US3653382A - Expandable airfelt pad - Google Patents

Expandable airfelt pad Download PDF

Info

Publication number
US3653382A
US3653382A US886878A US3653382DA US3653382A US 3653382 A US3653382 A US 3653382A US 886878 A US886878 A US 886878A US 3653382D A US3653382D A US 3653382DA US 3653382 A US3653382 A US 3653382A
Authority
US
United States
Prior art keywords
airfelt
folded
pad
absorbent
inch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US886878A
Inventor
Charles E Easley
Charles L Wosaba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Procter and Gamble Co
Original Assignee
Procter and Gamble Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Application granted granted Critical
Publication of US3653382A publication Critical patent/US3653382A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47GHOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/02Bed linen; Blankets; Counterpanes
    • A47G9/0207Blankets; Duvets
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47GHOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/02Bed linen; Blankets; Counterpanes
    • A47G9/0238Bed linen
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47KSANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00Body-drying implements; Toilet paper; Holders therefor
    • A47K10/02Towels
    • A61F13/01021
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51121Topsheet, i.e. the permeable cover or layer facing the skin characterised by the material
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/53409Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad having a folded core
    • A61F13/53436Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad having a folded core having an undulated or corrugated cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/12Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022Non-woven fabric
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F2013/00361Plasters
    • A61F2013/00727Plasters means for wound humidity control
    • A61F2013/00731Plasters means for wound humidity control with absorbing pads
    • A61F2013/00744Plasters means for wound humidity control with absorbing pads containing non-woven
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F2013/49068Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the shape of the outline
    • A61F2013/49076Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the shape of the outline as "I"-shaped
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F2013/53445Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad from several sheets
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F2013/53765Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry
    • A61F2013/53786Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry with folds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F2013/8488Accessories, not otherwise provided for, for absorbent pads including testing apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00Personal care
    • B32B2555/02Diapers or napkins
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/30Nc systems
    • G05B2219/50Machine tool, machine tool null till machine tool work handling
    • G05B2219/50047Positioning, indexing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24669Aligned or parallel nonplanarities
    • Y10T428/24686Pleats or otherwise parallel adjacent folds
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/27Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]

Definitions

  • ABSTRACT A composite pad composed of a topsheet and a bottom sheet
  • the absorbent, folded planar airfelt pad con- U.S. slsts ofa glabrous surfaced and folded alrfelt composed of less CL 1 A6lf tha textil length fibers uch as wood fibers and in.
  • This invention relates to improvements in the use of short fibered airfelt pads as the absorbent layers in disposable articles such as diapers, sanitary napkins and bandages, and the invention provides for rupture preventing use of such airfelt pads in these single use situations wherein the property of disposal by toilet flushing is a desirable attribute. More particularly, the invention provides an improved fluid absorbent, folded airfelt pad and composite pad containing same for use in disposable structures and articles which are subject to in use stresses and strains while in either a dry or moist condition due to their intended function.
  • the invention provides for an absorbent, folded airfelt pad and composite pad containing same, wherein an airfelt prepared from wood fibers is imparted with resistance to in use stresses and strains by a glabrous surfacing and folded structure.
  • the folded structure and glabrous surfacing overcomes the normal lack of tensile and bursting strength in such an airfelt pad by providing an airfelt structure capable of withstanding high strain with low stress levels so that sufficient stress to tear, rupture, bunch or split the pad is not generated.
  • glabrous surfaced refers to an airfelt provided with a surface which prevents or minimizes fiber entanglement between surfaces of the airfelt when it is in a folded configuration, whereby surface slippage between folds is enhanced to the extent that the airfelt cannot rupture itself without fold slippage under stress.
  • airfelts have advantage in the manufacture of disposable articles, such as diapers, sanitary napkins, and bandages, in that airfelts are fluid absorbent, bulky, resilient and economically advantageous by nature
  • certain real problems have been and are encountered in incorporating the advantageous aspects of such airfelts in disposable articles. These problems result from the inherent flimsy nature of a short fibered airfelt in that these airfelts have little or no inherent tensile or bursting strength.
  • the disposable articles wherein such airfelts can be advantageous are structured of one or more layers of non-woven, plastic, creped tissue, and like materials used as top and bottom sheets to contain and cover an airfelt; the airfelt is made part of such a structure to provide the advantageous qualities of fluid absorbency, bulk and resiliency mentioned above.
  • the present absorbent, folded airfelt pad and composite pad method of incorporating an airfelt in a disposable article was developed.
  • the advantageous absorbent, folded planar airfelt pad of the present invention comprises an airfelt prepared from short fibers, i.e. wood fibers, cotton linter fibers and other fibers derived from woody plants, provided with glabrous surfaces and given a folded configuration.
  • These glabrous surfaces permit folding or pleating of the airfelt without entanglement of the airfelt fibers in the adjacent surfaces of substantially horizontal folds, thereby permitting each fold to slip or open at a low stress level when the pad is placed under in use strain loading.
  • one suitable embodiment of the present advantageous absorbent, folded airfelt pad is one wherein both surfaces of an airfelt are provided with a laminant overlay or glabrous surface of, for example, creped tissue prior to folding or pleating.
  • the airfelt with surfaces of creped tissue is then given a cross-machine direction folding treatment to provide the required resiliency in the resultant absorbent, folded airfelt pad structure.
  • the glabrous surfaced airfelt pad of the present structure having tissue overlays on each of its surfaces is not itself sufficiently strong to withstand the in use forces to which it is subjected while in a fluid wetted condition, it is only when the present structure is given convoluting folds in the cross-machine direction that such ability to adapt to mechanical stress is attained.
  • an absorbent, folded airfelt pad and composite pad having the required resistance to strain loading together with a pleasing bulky nature, is prepared according to the present invention.
  • Another object of this invention is to provide an absorbent, folded airfelt pad which retains its ability to be easily repulped and flushed after use in a disposable article, but which is possessed of glabrous fiber retaining surfaces and has a pleated or folded form adapted to cooperate with the layers of the conventional disposable articles in which it finds use.
  • Another object of this invention is to provide an absorbent, folded airfelt pad having glabrous surfaces provided by facing tissue sheets which absorbent, folded airfelt pads provide required resistance to failure not so much by their real tensile strength, but by their cooperative nature in avoiding the setting up of stress concentration points.
  • an absorbent, folded planar airfelt pad folded in pleated form and provided with glabrous surfaces to allow slippage of the substantially horizontal folds upon application of mechanical stress.
  • a composite pad comprising an absorbent, folded airfelt pad disposed between a topsheet and a bottom sheet.
  • the invention comprises an airfelt composed of wood pulp fibers, which airfelt is surfaced on both of its sides or faces with tissue paper prior to folding the airfelt in the manner described in detail below to provide ability to absorb stress loading during in use situations and thereby to prevent excessive shifting and rupture failure in the resulting absorbent, folded airfelt pad.
  • the weak airfelt can be provided with the required glabrous surfaces by either a surface spraying of water soluble adhesive or a non-woven sheet used as alternates to the tissue paper surfaces. Also combinations of tissue paper, non-woven materials and in situ provision for a glabrous surface can be made.
  • FIG. 1 is an enlarged isometric view of a preferred embodiment of the composite pad and the absorbent, folded airfelt pad of this invention, illustrating a preferred fold configuration with the absorbent, folded airfelt pad in operative position between a topsheet and a bottom sheet, which topsheet is turned back to reveal the absorbent, folded airfelt pad;
  • FIG. 2 is an enlarged fragmentary cross sectional view taken along line 22 of FIG. 1 to further illustrate the fold configuration in the absorbent, folded airfelt pad;
  • FIG. 3 is an enlarged isometric view of another preferred embodiment of the absorbent, folded airfelt pad of this invention, illustrating another fold configuration with the pad in operative position as a composite pad between a turned back topsheet and a bottom sheet;
  • FIG. 4 is an enlarged fragmentary cross sectional view taken along line 4-4 ofFIG. 3;
  • FIG. 5 is an enlarged isometric view of yet another preferred form ofthe present absorbent, folded airfelt pad, il-
  • FIG. 6 is an enlarged fragmentary cross sectional view of FIG. 5 taken along line 66;
  • FIG. 7 is an isometric view, illustrating the absorbent, folded airfelt pad and composite pad of FIG. 1 assembled in a pleated disposable diaper
  • FIG. 8 is an isometric view of the diaper illustrated in FIG. 7 placed in the form assumed when he diaper is worn by an infant.
  • FIG. I of the drawings there is illustrated a composite pad I and an absorbent, folded airfelt pad 2, which absorbent, folded airfelt pad 2 comprises an airfelt 3 which is covered on both its surfaces, to provide the above stated glabrous surfaces, with tissue 4, which can be creped and has a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft., preferably about 10 lb. to about 12 lb. per 3,000 sq. ft.
  • the airfelt 3 has a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft., preferably about 24 lb. to about lb.
  • Absorbent, folded airfelt pad 2 is disposed between topsheet 7 and bottom sheet 8 to form composite pad
  • the absorbent, folded airfelt pad 2 illustrated is provided with folds 5 having a frequency of about 1 fold to about 4 folds, preferably about 2 folds to about 3 folds, per inch such that the fold ratio, or ratio of folded to nonfolded length, in the absorbent, folded airfelt pad 2 is about 0.3 to about 0.7 and preferably is about 0.4 to about 0.5
  • the folded thickness of absorbent, folded airfelt pad 2 is about 0.030 inch to about 0.250 inch, preferably about 0.070 inch to about 0.150 inch, and can be adjusted by calendering between rolls for an intended disposable article use.
  • Lines of embossing 6, which are about one-sixteenth inch to about three thirty-seconds inch in width on widely spaced, for example about 1 inch to about 2 inch centers cross the folds 5 in a generally perpendicular direction and can be provided by roller embossing, as illustrated in FIG. 1. These lines of embossing 6 are used to maintain the folded integrity of absorbent, folded airfelt pad 2 for facilitation of its assembly into disposable articles.
  • Various embossing patterns such as diamonds, circles, dots, etc. or like patterns of water soluble adhesives, applied to supply low strength bonds which do not prevent in use extension of the folds 5, can be employed in place of the lines of embossing 6 for absorbent, folded airfelt pad 2 integrity.
  • the folds 5 shown in FIG. 1 are preferably oriented in the cross-machine direction of airfelt 3 and provide expansion for the absorbent, folded airfelt pad 2 in the machine direction.
  • the illustrated pattern of folds 5 shown in FIG. 1 will provide protection against failure under machine direction in use loading as well as under loading along a diagonal direction which has a lateral component such as the type of loading placed on a diaper by baby leg and buttock movements during crawling and walking.
  • Other fold patterns, for example diagonal folds, in absorbent, folded airfelt pad 2 can be employed to provide either crossmachine or machine direction expansion in absorbent, folded airfelt pad 2 or combinations of fold patterns can be employed.
  • tissue 4 layers providing the glabrous surfaces of the airfelt 3 need only provide sufficient tensile strength to enable the pull-out or potential pull-out of the folds 5 in the absorbent, folded airfelt pad 2.
  • the tissue 4 can be creped, and the tensile strength thereof does and is not intended to provide the full in use protection against rupture or bursting failure. Indeed, if it did so, the tissue 4 or other covering material can render the absorbent, folded airfelt pad 2 so stiff and non-resilient as to negate its usefulness in a disposable article or diaper structure, although such resiliency and stiffness may not negate effectiveness in other disposable articles such as bed pads.
  • the folds 5 in absorbent, folded airfelt pad 2 act by expansion and slippage to prevent in use tenslle stresses from localizing to the extent that rupture or bursting failures are caused.
  • FIG. 2 further illustrates the nature of the composite pad I as comprising a topsheet 7 and a bottom sheet 8 with absorbent, folded airfelt pad 2 disposed therebetween.
  • the fold configuration of the folds 5 is readily apparent.
  • topsheet 7 and bottom sheet 8 are either unattached or only edge attached to absorbent, folded airfelt pad 2 so that the slippage and expansion of folds 5 can be fully utilized within the disposable article to prevent rupture of absorbent, folded airfelt pad 2 and airfelt 3.
  • FIG. 3 there is illustrated another em bodiment of composite pad I wherein the folds 5 in absorbent, folded airfelt pad 2 are in the form of interlocking T" or Greek letter omega chains.
  • the absorbent, folded airfelt pad 2 of FIG. 3 is stabilized for handling ease in assembling disposable articles by the above described lines of embossing 6extending across the folds 5. 1
  • FIG. 4 further illustrates the interlocking T folds 5 in absorbent, folded airfelt pad 2 as one preferred embodiment of the present invention.
  • FIG. 5 there is again illustrated a composite pad 1 having an absorbent, folded airfelt pad 2 disposed between a topsheet 7 and a bottom sheet 8. It is noted that the folds 5 of FIG. 5 have a configuration similar to the folds 5 in FIG. I with the exception that they overlap less or have a higher fold ratio, as defined above.
  • FIG. 7 illustrates a pleated diaper 9, as an embodiment of a disposable article, in which composite pad I and absorbent folded airfelt pad 2 are imminently suited to use.
  • bottom sheet 8 is extended outwardly from absorbent, folded airfelt pad 2 to provide leg seal and waist pinning area for pleated diaper 9.
  • FIG. 8 illustrates the form of pleated diaper 9 when placed about an infant in wearing position so that bottom sheet 8 is on the outside and is available at the infants waist for pinning while absorbent, folded airfelt pad 2 and topsheet 7 are interior of pleated diaper 9.
  • Topsheet 7 is shown in position to contact a babys skin while absorbent, folded airfelt pad 2 lies below.
  • absorbent, folded airfelt pad 2 and composite pad 1 structures are structures which provide nonordered resistance to stresses to result in an unexpected increase in apparent rupture or burst resistance over that which would be obtained from the sum rupture or burst resistances of the surface layers and the airfelt.
  • the absorbent, folded airfelt pad 2 exhibits a marked increase to rupture and burst stresses over that afforded by either airfelt 3 or airfelt 3 together with surfaces of tissue 4. This improvement in tear or burst resistance is realized by forming absorbent, folded airfelt pad 2 from airfelt 3 which in other than its tissue 4 surface layers has little or no apparent tear or tensile strength.
  • the absorbent, folded airfelt pad 2 is folded so that, under the in use loading to which it is subject, any tensile or burst stresses are generalized and absorbed by the structure without approaching its absolute tensile strength.
  • tissue 4 surface layers of the absorbent, folded airfelt pad 2 do not approach the tensile strength which would be required to resist failure.
  • tissue 4 or glabrous surface layers prevent either airfelt 3 fiber entanglement at contact surfaces between adjacent folds 5 or fiber entanglement interaction between the absorbent, folded airfelt pad 2 and other disposable article layers, e.g.
  • absorbent, folded airfelt pad 2 is that, for a given basis weight, it has an apparent bulk resiliency hysteresis with regard to pressure loading and unloading that is difficult or impossible to realize in a nonfolded structure. This hysteresis or springiness under repeated pressure loading is also imparted to composite pad 1. Comparing between pads of equal basis weight, the absorbent, folded airfelt pad 2 of the present invention exhibits an increased absorbency as compared with a nonfolded structure containing like layers.
  • a test apparatus was employed wherein a 4 by 4 inch sample of the composite pad 1, or absorbent, folded airfelt pad 2, as prepared for test by wetting with 2 times its dry weight with water and allowing it to sit or equilibrate for I minute, was restrained in compression between two annular, flat metal rings of aluminum with an internal opening diameter of 3.5 inches.
  • the bottom center of the 3.5 inch diameter sample thus restrained rested on a 1.5 inch diameter first plate covered with,.one-sixteenth inch polyurethane foam.
  • a second 1 inch diameter plate covered with one-sixteenth polyurethane foam was centered and pressed down on the top of the sample, disposed on the first or bottom plate, with a pressure of 12.7 lb. per sq. in.
  • test sample was additionally wetted with 2 times its dry weight of water and allowed to equilibrate for 1 minute.
  • the first plate, pressing on the bottom surface of the sample under test, was free to rotate in the plane of the sample while the second plate pressing against the top surface was articulated so that it could be rotated within an arc of 45 at a frequency of 55 times per minute.
  • the rotary movement of the first and second plates tended to tear out the restrained test sample in a circle arou nd the articulated 1 inch diameter central pressure plate.
  • a test period in this simulated test with the described rotary articulation was 4 minutes, and the test results were recorded as tear grades from 0 to 3 by inspection, with tear grades greater than I equated to unsatisfactory performance in actual use.
  • the tear grades assigned to individual test samples had the following meaning:
  • EXAMPLE I An absorbent, folded airfelt pad was formed by first preparing an airfelt from Southern softwood kraft fibers. The airfelt has a basis weight prior to folding of 48 lb. per 3,000 sq. ft., and was enclosed between two sheets of creped tissue paper, each of which tissue paper sheets had a basis weight of l 1.5 lb. per 3,000 sq. ft. The resulting composite material was folded in the fold configuration illustrated in FIGS. 3 and 4 with a fold frequency of 4 folds per inch and a fold ratio of 0.57.
  • the substantially horizontal folds were made to run in the crossmachine direction of the tissue paper enclosing sheets and were held in place, for convenience in handling the resulting absorbent, folded airfelt pad, by l/l6 inch wide embossing lines located on l /sinch centers and running across the folds.
  • the resulting absorbent, folded planar airfelt pad had a thickness of 0.175 inch, as folded, and was calendered between a rubber roll and a steel roll loaded to 35 lb. per linear inch to reduce the thickness to 0.120 inch.
  • the topsheet was a non-woven rayon fiber material having a basis weight of 13 lb. per 3,000 sq. ft., while the bottom sheet was a polyethylene sheet having a thickness of 0.001 inch.
  • the diaper was shown to hold 195 grams, or 7.5 times its dry absorbent, folded airfelt pad weight, of water while subjected to a compressive loading of 1 lb. per sq. inch to simulate in use pressures.
  • the diaper of this example was also found to be tear resistant, flushable by the method described above and otherwise satisfactory for use when subjected to actual wearing and soiling by an infant.
  • a diaper with an absorbent pad weight of 25 grams was prepared in a similar way from identical materials, with the exception that the airfelt was not folded and additional airfelt was provided for equal weight, was found to hold only 169 grams or 6.5 times it dry weight of water.
  • This comparison diaper had a tear grade of 3, evidencing a tearing of greater than 180 around the oscillated portion and unsatisfactory susceptibility to in use failure.
  • a composite pad assembled from an absorbent, folded airfelt pad, prepared from airfelt having an unfolded basis weight of 8 lb. per 3,000 sq. ft. and tissue having a basis weight of6 lb. per 3,000 sq. ft., using a fold ratio of 0.3 and a fold frequency of 1 per inch in the manner of this example I will be found to be tear and rupture resistant, absorbent and otherwise satisfactory for disposable article use as a diaper.
  • the absorbent, folded airfelt pad of this example I assembled into a composite pad having a non-woven topsheet and a bottom sheet comprised of a plastic sheet with an outer non-woven layer, will be found suitable for use either as a sanitary napkin or as a bandage.
  • EXAMPLE II An absorbent, folded airfelt pad was formed by first preparing an airfelt from Southern softwood kraft fibers.
  • the airfelt had a basis weight prior to folding of 48 lb. per 3,000 sq. ft., and was enclosed between two sheets of creped tissue paper, each of which has an unfolded basis weight of 11.5 lb. per 3,000 sq. ft.
  • the resulting composite material was folded in the fold configuration illustrated in FIGS. 1 and 2 with a fold frequency of 2.7 folds per inch and a fold ratio of 0.57.
  • the folds were made to run in the cross-machine direction of the tissue paper enclosing sheets and were held in place by 1/16 inch wide embossing lines located on 1%0 inch centers and running across the folds.
  • the resulting absorbent, folded airfelt pad cut to measure 16 inches in the folded direction and 12.5 inches in the cross fold direction and having a weight of 26 grams was assembled into a diaper having a topsheet and a bottom sheet as illustrated in FIG. 7.
  • the topsheet was a non-woven rayon fiber material having a basis weight of 13 lb. per 3,000 sq. ft.
  • the bottom sheet was a polyethylene sheet having a thickness of0.00l inch.
  • the prepared diaper was shown to hold 200 grams, or 7.7 times its dry weight, of water while subjected to a compressive loading of 1 lb. per sq. in. to simulate in use pressures.
  • a simulated test of tear under in use movement using the test apparatus and method described above, was conducted on the diaper with the result that no tearing, or a tear grade of 0, was observed.
  • the diaper of this example ll was found to be tear resistant, flushable by the method described above and otherwise satisfactory for use when subjected to actual wear by an infant.
  • a composite pad assembled from an absorbent, folded airfelt pad, prepared from airfelt having an unfolded basis weight of 200 lb. per 3,000 sq. ft. and tissue having an unfolded basis weight of 24 lb. per 3,000 sq. ft., with a fold ratio of 0.7 and a fold frequency of 2 per inch, will be found to be tear and rupture resistant, absorbent and otherwise satisfactory for disposable article use as a diaper or a bed pad.
  • An absorbent, folded airfelt pad was formed by first preparing an airfelt from Southern softwood kraft fibers.
  • the airfelt had an unfolded basis weight of 72 lb. per 3,000 sq. ft., and was enclosed between two sheets of creped tissue paper, each of which tissue paper sheets had a basis weight of l 1.5 lb. per 3,000 sq. ft.
  • the resulting composite material was folded in the fold configuration illustrated in FIGS. 3 and 4 with a fold frequency of3 folds per inch and a fold ratio of0.67.
  • the folds were made to run in the cross-machine direction of the tissue paper enclosing sheets and were held in place by an embossed diamond pattern consisting of 1 inch machine direction by 2 inch cross-machine direction diamonds outlined by embossed lines with a width of three thirty-seconds inch.
  • the so cut piece of absorbent, folded airfelt pad was assembled into a diaper having a topsheet and a bottom sheet as illustrated in FIG. 7.
  • the topsheet was a non-woven rayon fiber material having a basis weight of 13 lb. per 3,000 sq. ft., while the bottom sheet was a polyethylene sheet having a thickness of0.00l inch.
  • the diaper was shown to hold 231 grams, or 7.7 times its dry weight of water while subjected to a compressive loading of 1 lb. per sq. in. to simulate in use pressures.
  • a simulated test of tear under in use movement was conducted on the diaper with the result that a tear grade of l was recorded. Although this tear grade of 1 indicates a small amount of tear, less than of total tear around the test periphery, the diaper of this example III was found to be tear resistant, flushable and otherwise satisfactory for use when subjected to actual wear by an infant.
  • a composite pad prepared in the manner of this example 111, from an absorbent, folded airfelt pad, made from airfelt having an unfolded basis weight of 24 lb. per 3,000 sq. ft. and tissue having an unfolded basis weight of 6 lb. per 3,000 sq. ft., with a fold ratio of 0.4 and a fold frequency of 4 per inch, will be found to be tear and rupture resistant, absorbent and otherwise satisfactory for use as a diaper.
  • An absorbent, folded, planar airfelt pad for use in disposable articles which airfelt pad is comprised of airfelt with glabrous surfaces and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length of about 0.3 to about 0.7.
  • An absorbent, folded, planar airfelt pad for use in disposable articles which airfelt pad is comprised of airfelt having a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length ratio of about 0.3 to about 0.7.
  • the absorbent, folded, planar airfelt pad for use in disposable articles of claim 2 wherein the folds are stabilized by lines of embossing having a width of about one-sixteenth inch to about three thirty-seconds inch and the absorbent, folded airfelt pad thickness is about 0.030 inch to about 0.250 inch.
  • An absorbent, folded, planar airfelt pad for use in disposable articles which airfelt pad is comprised of airfelt having a basis weight of about 24 lb. to about 100 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 10 lb. to about 12 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 2 to about 3 folds per inch together with a folded to unfolded length ratio of about 0.4 to about 0.5.
  • the absorbent, folded, planar airfelt pad for use in disposable articles of claim 4 wherein the substantially horizontal folds are stabilized by lines of embossing having a width of about one-sixteenth inch to about three thirtyseconds inch and the absorbent, folded airfelt pad thickness is about 0.070 inch to about 0.150 inch.
  • a composite pad for use as a disposable article which composite pad is comprised of a topsheet and a bottom sheet with an absorbent, folded, planar airfelt pad disposed therebetween, which airfelt pad is comprised of airfelt having a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length ratio of about 0.3 to about 0.7.
  • topsheet is a non-woven sheet
  • bottom sheet is a plastic film
  • the disposable article is a diaper.
  • topsheet is a non-woven sheet
  • bottom sheet is a plastic film with an outer layer of non-woven sheet
  • the disposable article is a sanitary napkin.

Abstract

A composite pad composed of a topsheet and a bottom sheet with an absorbent, folded planar airfelt pad disposed therebetween. The absorbent, folded planar airfelt pad consists of a glabrous surfaced and folded airfelt composed of less than textile length fibers such as wood pulp fibers and intended for use as an absorbent layer in disposable articles, for example disposable diapers having a topsheet, an absorbent layer, and a relatively water impermeable backsheet. The glabrous surfaced and folded airfelt provides interface slippage between substantially horizontal folds thereby avoiding tensile stresses and preventing in use rupture failure of the absorbent layer in the disposable articles, while contributing to toilet flushing disposal and absorbency.

Description

1 States atent 1 3,653,382 Easley et a1. [45] Apr. 4, 1972 [54] EXPANDABLE AHRFELT PAD 3,481,337 12/1969 Ruffo ..128/284 [72] Inventors: Charles E. Easley; Charles L. wosaba, H, 3,525,337 8/1970 S1mons et al ..128/290 b th f t', Oh'
o o Cmcmna l 10 Primary Examiner-Charles F. Rosenbaum [73] Assignee: The Procter & Gamble Company, Cincin- Attorney-William S. Shelow, Ill
nati, Ohio 221 Filed: Dec. 22, 1969 [57] ABSTRACT A composite pad composed of a topsheet and a bottom sheet [21] Appl' No" 886,878 with an absorbent, folded planar airfelt pad disposed I therebetween. The absorbent, folded planar airfelt pad con- U.S. slsts ofa glabrous surfaced and folded alrfelt composed of less CL 1 A6lf tha textil length fibers uch as wood fibers and in. [58] Field of Search ..128/284, 286, 287, 290, 296, tended for use as an absorbent layer in disposable articles, for 128/156; 161/116, 122, 123, 130, 1 2 example disposable diapers having a topsheet, an absorbent layer, and a relatively water impermeable backsheet. The [56] References cued glabrous surfaced and folded airfelt provides interface slip- UNITED STATES PATENTS page between substantially horizontal folds thereby avoiding tensile stresses and preventing in use rupture failure of the ab- Gl'een n so -bent layer in the disposable articles contributing to Hervey et 31.. toilet flushing disposal and absorbency 3,430,629 3/1969 Murphy ..128/284 3,441,023 4/1969 128/287 8 Claims, 8 Drawing Figures Rijssenbeek Patented April 4, 1972 3,653,382
2 Sheets-Sheet 2 INVENTORS Charles E. Eosley BY Charles L- Wosobo II ATTORNEY EXPANDABLE AIRFELT PAD BACKGROUND OF THE INVENTION This invention relates to improvements in the use of short fibered airfelt pads as the absorbent layers in disposable articles such as diapers, sanitary napkins and bandages, and the invention provides for rupture preventing use of such airfelt pads in these single use situations wherein the property of disposal by toilet flushing is a desirable attribute. More particularly, the invention provides an improved fluid absorbent, folded airfelt pad and composite pad containing same for use in disposable structures and articles which are subject to in use stresses and strains while in either a dry or moist condition due to their intended function.
Specifically, the invention provides for an absorbent, folded airfelt pad and composite pad containing same, wherein an airfelt prepared from wood fibers is imparted with resistance to in use stresses and strains by a glabrous surfacing and folded structure. The folded structure and glabrous surfacing overcomes the normal lack of tensile and bursting strength in such an airfelt pad by providing an airfelt structure capable of withstanding high strain with low stress levels so that sufficient stress to tear, rupture, bunch or split the pad is not generated.
in referring to airfelts herein, applicants intend reference to sheets which are formed from short wood fibers or similar cellulosic fibers by dispersing the fibers in an air or gaseous stream and depositing them on a moving foraminous receiving media to form minimally cohesive sheets or pads having little or no inherent tensile strength. The term, glabrous surfaced, with reference to airfelt, refers to an airfelt provided with a surface which prevents or minimizes fiber entanglement between surfaces of the airfelt when it is in a folded configuration, whereby surface slippage between folds is enhanced to the extent that the airfelt cannot rupture itself without fold slippage under stress. Processes for the formation of airfelt pads are well-known in the art as exemplified by the processes and apparatus of U.S. Pat. No. 2,618,816, issued to C. G. .Ioa on Nov. 25, 1952 and U.S. Pat. No. 2,689,985, issued to W. H. Burger et al. on Sept. 28, 1954.
Although it has been realized that airfelts have advantage in the manufacture of disposable articles, such as diapers, sanitary napkins, and bandages, in that airfelts are fluid absorbent, bulky, resilient and economically advantageous by nature, certain real problems have been and are encountered in incorporating the advantageous aspects of such airfelts in disposable articles. These problems result from the inherent flimsy nature of a short fibered airfelt in that these airfelts have little or no inherent tensile or bursting strength. In general, the disposable articles wherein such airfelts can be advantageous are structured of one or more layers of non-woven, plastic, creped tissue, and like materials used as top and bottom sheets to contain and cover an airfelt; the airfelt is made part of such a structure to provide the advantageous qualities of fluid absorbency, bulk and resiliency mentioned above.
At the same time, incorporation of these airfelts has in the past been accompanied by problems because it is the intended nature of such disposable articles that they absorb body fluids and are placed in mechanical stress situations during use. Past experience has shown that airfelts in these moist or wet mechanical stressed situations bunch, ball up, shift, rupture, burst and otherwise mechanically fail to stay in place while contributing little or no overall strength to the disposable article. The addition of wet strength additives to such airfelts to provide tensile strength is not desirable since this addition negates the desirable flimsy nature of the airfelt in toilet flushing disposal.
Recognizing the important absorbency and resiliency characteristics, as well as the economic advantages, inherent in airfelt pads for these disposable structures, several methods to improve the flimsy nature of the airfelt pads in disposable articles have been disclosed in the prior art. Examples of these methods are provided by such patents as U.S. Pat. No. 3,395,708, issued to L. R. B. Hervey et al. on Aug. 6, 1968,
U.S. Pat. No. 2,896,618, issued to R. J. Schaeffer on July 28, 1959 and U.S. Pat. No. 2,931,360, issued to F. F. Dexter on Apr. 5, 1960.
The methods disclosed in the prior art have in their various forms provided for the stabilization of airfelt pads and do in some degree prevent the shifting and bunching of said pads; however, there has remained a problem of making an airfelt pad cooperate to best advantage in disposable articles. By cooperation it is intended to convey the meaning that the airfelt is not only prevented from bunching up, shifting, rupturing and tearing to constitute a failure of the disposable article in which it is incorporated, but is provided with such a form that it materially contributes to the stability, resiliency and fluid absorbency of such a structure. The disclosed characteristics of the present absorbent, folded airfelt pad are considered to be of particular importance when such absorbent, folded airfelt pad forms the absorbent layer of a disposable article having a topsheet of controlled hydrophobicity and a plastic bottom sheet such as those disclosed in U.S. Reissue No. 26,151, originally U.S. Pat. No. 3,180,335, issued to R. C. Duncan et al. on Apr. 27, 1965. While the several methods noted above for airfelt pad stabilization are available, applicants are unaware of any prior art method of engendering the present cooperation from an airfelt in a disposable article.
SUMMARY OF THE INVENTION Inasmuch as a practical means of gaining the several advantages of airfelts in disposable articles without suffering the disadvantages resulting from the flimsy nature of such materials was desired, the present absorbent, folded airfelt pad and composite pad method of incorporating an airfelt in a disposable article was developed. In general, the advantageous absorbent, folded planar airfelt pad of the present invention comprises an airfelt prepared from short fibers, i.e. wood fibers, cotton linter fibers and other fibers derived from woody plants, provided with glabrous surfaces and given a folded configuration. These glabrous surfaces permit folding or pleating of the airfelt without entanglement of the airfelt fibers in the adjacent surfaces of substantially horizontal folds, thereby permitting each fold to slip or open at a low stress level when the pad is placed under in use strain loading.
Although this would be possible, it is not intended, and the present glabrous, or slippage, surfaces do not in and of themselves provide the total tensile and bursting strengths necessary for the advantageous incorporation of an airfelt in a disposable structure. To provide such strength would defeat the desirable toilet flushability of the absorbent, folded airfelt pad, wherein such pad is disintegrated by water contact and flushed away. Rather, it is the sum of the airfelt and the cooperation between the absorbent, folded airfelt pad and its surfaces which provides the necessary resistance to mechanical failure.
In this regard one suitable embodiment of the present advantageous absorbent, folded airfelt pad is one wherein both surfaces of an airfelt are provided with a laminant overlay or glabrous surface of, for example, creped tissue prior to folding or pleating. The airfelt with surfaces of creped tissue is then given a cross-machine direction folding treatment to provide the required resiliency in the resultant absorbent, folded airfelt pad structure. This is to say that the glabrous surfaced airfelt pad of the present structure having tissue overlays on each of its surfaces is not itself sufficiently strong to withstand the in use forces to which it is subjected while in a fluid wetted condition, it is only when the present structure is given convoluting folds in the cross-machine direction that such ability to adapt to mechanical stress is attained. In this manner and according to the details and embodiments of the present invention discussed below, an absorbent, folded airfelt pad and composite pad, having the required resistance to strain loading together with a pleasing bulky nature, is prepared according to the present invention.
It is, accordingly, the principle object of this invention to provide an absorbent, folded airfelt pad as an improvement for airfelts to be incorporated in disposable articles of a personal use nature.
Another object of this invention is to provide an absorbent, folded airfelt pad which retains its ability to be easily repulped and flushed after use in a disposable article, but which is possessed of glabrous fiber retaining surfaces and has a pleated or folded form adapted to cooperate with the layers of the conventional disposable articles in which it finds use.
Another object of this invention is to provide an absorbent, folded airfelt pad having glabrous surfaces provided by facing tissue sheets which absorbent, folded airfelt pads provide required resistance to failure not so much by their real tensile strength, but by their cooperative nature in avoiding the setting up of stress concentration points.
It is yet another object of this invention to provide an absor-- bent, folded airfelt with glabrous surfaces and a convoluted or folded form such that stresses applied to the airfelt pad are generalized instead of being focused at a failure point.
It is still a further object of this invention to provide a composite pad exhibiting bulk, resiliency and enhanced fluid absorbency, which composite pad comprises a topsheet and a bottom sheet with an absorbent, folded airfelt pad lying therebetween.
Briefly stated, in accordance with one aspect of this invention, there is provided an absorbent, folded planar airfelt pad, folded in pleated form and provided with glabrous surfaces to allow slippage of the substantially horizontal folds upon application of mechanical stress. There is also provided a composite pad comprising an absorbent, folded airfelt pad disposed between a topsheet and a bottom sheet.
In one specific embodiment, the invention comprises an airfelt composed of wood pulp fibers, which airfelt is surfaced on both of its sides or faces with tissue paper prior to folding the airfelt in the manner described in detail below to provide ability to absorb stress loading during in use situations and thereby to prevent excessive shifting and rupture failure in the resulting absorbent, folded airfelt pad. In other specific embodiments, the weak airfelt can be provided with the required glabrous surfaces by either a surface spraying of water soluble adhesive or a non-woven sheet used as alternates to the tissue paper surfaces. Also combinations of tissue paper, non-woven materials and in situ provision for a glabrous surface can be made.
BRIEF DESCRIPTION OF THE DRAWINGS While the application concludes with claims particularly pointing out and distinctly claiming the subject matter which is regarded as forming the present invention, it is believed that the invention will be better understood from the accompanying description taken in connection with the accompanying drawing, wherein like numbers refer to like elements in the various figures, in which:
FIG. 1 is an enlarged isometric view ofa preferred embodiment of the composite pad and the absorbent, folded airfelt pad of this invention, illustrating a preferred fold configuration with the absorbent, folded airfelt pad in operative position between a topsheet and a bottom sheet, which topsheet is turned back to reveal the absorbent, folded airfelt pad;
FIG. 2 is an enlarged fragmentary cross sectional view taken along line 22 of FIG. 1 to further illustrate the fold configuration in the absorbent, folded airfelt pad;
FIG. 3 is an enlarged isometric view of another preferred embodiment of the absorbent, folded airfelt pad of this invention, illustrating another fold configuration with the pad in operative position as a composite pad between a turned back topsheet and a bottom sheet;
FIG. 4 is an enlarged fragmentary cross sectional view taken along line 4-4 ofFIG. 3;
FIG. 5 is an enlarged isometric view of yet another preferred form ofthe present absorbent, folded airfelt pad, il-
lustrating another fold ratio in the absorbent, folded airfelt pad with the pad in operative position between a topsheet and a bottom sheet as a composite pad;
FIG. 6 is an enlarged fragmentary cross sectional view of FIG. 5 taken along line 66;
FIG. 7 is an isometric view, illustrating the absorbent, folded airfelt pad and composite pad of FIG. 1 assembled in a pleated disposable diaper; and
FIG. 8 is an isometric view of the diaper illustrated in FIG. 7 placed in the form assumed when he diaper is worn by an infant.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG. I of the drawings, there is illustrated a composite pad I and an absorbent, folded airfelt pad 2, which absorbent, folded airfelt pad 2 comprises an airfelt 3 which is covered on both its surfaces, to provide the above stated glabrous surfaces, with tissue 4, which can be creped and has a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft., preferably about 10 lb. to about 12 lb. per 3,000 sq. ft. The airfelt 3 has a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft., preferably about 24 lb. to about lb. per 3,000 sq. ft. Absorbent, folded airfelt pad 2 is disposed between topsheet 7 and bottom sheet 8 to form composite pad The absorbent, folded airfelt pad 2 illustrated is provided with folds 5 having a frequency of about 1 fold to about 4 folds, preferably about 2 folds to about 3 folds, per inch such that the fold ratio, or ratio of folded to nonfolded length, in the absorbent, folded airfelt pad 2 is about 0.3 to about 0.7 and preferably is about 0.4 to about 0.5 The folded thickness of absorbent, folded airfelt pad 2 is about 0.030 inch to about 0.250 inch, preferably about 0.070 inch to about 0.150 inch, and can be adjusted by calendering between rolls for an intended disposable article use. Lines of embossing 6, which are about one-sixteenth inch to about three thirty-seconds inch in width on widely spaced, for example about 1 inch to about 2 inch centers cross the folds 5 in a generally perpendicular direction and can be provided by roller embossing, as illustrated in FIG. 1. These lines of embossing 6 are used to maintain the folded integrity of absorbent, folded airfelt pad 2 for facilitation of its assembly into disposable articles. Various embossing patterns such as diamonds, circles, dots, etc. or like patterns of water soluble adhesives, applied to supply low strength bonds which do not prevent in use extension of the folds 5, can be employed in place of the lines of embossing 6 for absorbent, folded airfelt pad 2 integrity. The folds 5 shown in FIG. 1 are preferably oriented in the cross-machine direction of airfelt 3 and provide expansion for the absorbent, folded airfelt pad 2 in the machine direction. The illustrated pattern of folds 5 shown in FIG. 1 will provide protection against failure under machine direction in use loading as well as under loading along a diagonal direction which has a lateral component such as the type of loading placed on a diaper by baby leg and buttock movements during crawling and walking. Other fold patterns, for example diagonal folds, in absorbent, folded airfelt pad 2 can be employed to provide either crossmachine or machine direction expansion in absorbent, folded airfelt pad 2 or combinations of fold patterns can be employed. It is noted that the tissue 4 layers providing the glabrous surfaces of the airfelt 3 need only provide sufficient tensile strength to enable the pull-out or potential pull-out of the folds 5 in the absorbent, folded airfelt pad 2. The tissue 4 can be creped, and the tensile strength thereof does and is not intended to provide the full in use protection against rupture or bursting failure. Indeed, if it did so, the tissue 4 or other covering material can render the absorbent, folded airfelt pad 2 so stiff and non-resilient as to negate its usefulness in a disposable article or diaper structure, although such resiliency and stiffness may not negate effectiveness in other disposable articles such as bed pads. The folds 5 in absorbent, folded airfelt pad 2 act by expansion and slippage to prevent in use tenslle stresses from localizing to the extent that rupture or bursting failures are caused.
FIG. 2 further illustrates the nature of the composite pad I as comprising a topsheet 7 and a bottom sheet 8 with absorbent, folded airfelt pad 2 disposed therebetween. The fold configuration of the folds 5 is readily apparent. In disposable article use, topsheet 7 and bottom sheet 8 are either unattached or only edge attached to absorbent, folded airfelt pad 2 so that the slippage and expansion of folds 5 can be fully utilized within the disposable article to prevent rupture of absorbent, folded airfelt pad 2 and airfelt 3.
Referring further to FIG. 3 there is illustrated another em bodiment of composite pad I wherein the folds 5 in absorbent, folded airfelt pad 2 are in the form of interlocking T" or Greek letter omega chains. The absorbent, folded airfelt pad 2 of FIG. 3 is stabilized for handling ease in assembling disposable articles by the above described lines of embossing 6extending across the folds 5. 1
FIG. 4 further illustrates the interlocking T folds 5 in absorbent, folded airfelt pad 2 as one preferred embodiment of the present invention.
Referring now to FIG. 5 there is again illustrated a composite pad 1 having an absorbent, folded airfelt pad 2 disposed between a topsheet 7 and a bottom sheet 8. It is noted that the folds 5 of FIG. 5 have a configuration similar to the folds 5 in FIG. I with the exception that they overlap less or have a higher fold ratio, as defined above.
FIG. 7 illustrates a pleated diaper 9, as an embodiment ofa disposable article, in which composite pad I and absorbent folded airfelt pad 2 are imminently suited to use. In FIG. 7, bottom sheet 8 is extended outwardly from absorbent, folded airfelt pad 2 to provide leg seal and waist pinning area for pleated diaper 9.
FIG. 8 illustrates the form of pleated diaper 9 when placed about an infant in wearing position so that bottom sheet 8 is on the outside and is available at the infants waist for pinning while absorbent, folded airfelt pad 2 and topsheet 7 are interior of pleated diaper 9. Topsheet 7 is shown in position to contact a babys skin while absorbent, folded airfelt pad 2 lies below.
In noting major advantages of the present absorbent, folded airfelt pad 2 and composite pad 1 structures, it is specifically noted that they are structures which provide nonordered resistance to stresses to result in an unexpected increase in apparent rupture or burst resistance over that which would be obtained from the sum rupture or burst resistances of the surface layers and the airfelt. In particular, the absorbent, folded airfelt pad 2 exhibits a marked increase to rupture and burst stresses over that afforded by either airfelt 3 or airfelt 3 together with surfaces of tissue 4. This improvement in tear or burst resistance is realized by forming absorbent, folded airfelt pad 2 from airfelt 3 which in other than its tissue 4 surface layers has little or no apparent tear or tensile strength. The absorbent, folded airfelt pad 2 is folded so that, under the in use loading to which it is subject, any tensile or burst stresses are generalized and absorbed by the structure without approaching its absolute tensile strength. In this regard, it is noted that the tissue 4 surface layers of the absorbent, folded airfelt pad 2 do not approach the tensile strength which would be required to resist failure. In fact, it is only necessary that the tissue 4 or glabrous surface layers prevent either airfelt 3 fiber entanglement at contact surfaces between adjacent folds 5 or fiber entanglement interaction between the absorbent, folded airfelt pad 2 and other disposable article layers, e.g. topsheet 7 and bottom sheet 8 in composite pad 1, which would prevent absorbent, folded airfelt pad 2 from slipping, stretching or expanding under stress loading. Another advantage of the absorbent, folded airfelt pad 2 is that, for a given basis weight, it has an apparent bulk resiliency hysteresis with regard to pressure loading and unloading that is difficult or impossible to realize in a nonfolded structure. This hysteresis or springiness under repeated pressure loading is also imparted to composite pad 1. Comparing between pads of equal basis weight, the absorbent, folded airfelt pad 2 of the present invention exhibits an increased absorbency as compared with a nonfolded structure containing like layers.
In testing the composite pad 1 and absorbent, folded airfelt pad 2 both a simulated testing of wearer movement in disposable article use and observed results of disposable diapers after infant wear was employed.
In the simulated testing, a test apparatus was employed wherein a 4 by 4 inch sample of the composite pad 1, or absorbent, folded airfelt pad 2, as prepared for test by wetting with 2 times its dry weight with water and allowing it to sit or equilibrate for I minute, was restrained in compression between two annular, flat metal rings of aluminum with an internal opening diameter of 3.5 inches. The bottom center of the 3.5 inch diameter sample thus restrained rested on a 1.5 inch diameter first plate covered with,.one-sixteenth inch polyurethane foam. A second 1 inch diameter plate covered with one-sixteenth polyurethane foam was centered and pressed down on the top of the sample, disposed on the first or bottom plate, with a pressure of 12.7 lb. per sq. in. and the test sample was additionally wetted with 2 times its dry weight of water and allowed to equilibrate for 1 minute. The first plate, pressing on the bottom surface of the sample under test, was free to rotate in the plane of the sample while the second plate pressing against the top surface was articulated so that it could be rotated within an arc of 45 at a frequency of 55 times per minute. The rotary movement of the first and second plates tended to tear out the restrained test sample in a circle arou nd the articulated 1 inch diameter central pressure plate. A test period in this simulated test with the described rotary articulation was 4 minutes, and the test results were recorded as tear grades from 0 to 3 by inspection, with tear grades greater than I equated to unsatisfactory performance in actual use. The tear grades assigned to individual test samples had the following meaning:
Tear grade 0-no tear around the 1 inch diameter compressed area Tear grade l-tearing in less than a total of around the compressed area Tear grade 2tearing in a total of 90 to around the compressed area Tear grade 3-tearing greater than a total of 180 around the compressed area Having described the composite pad 1 and absorbent, folded airfelt pad 2 of this invention, the following examples are intended to be further illustrative of the manner in which the products of this invention can be formed and of their uses in disposable articles.
EXAMPLE I An absorbent, folded airfelt pad was formed by first preparing an airfelt from Southern softwood kraft fibers. The airfelt has a basis weight prior to folding of 48 lb. per 3,000 sq. ft., and was enclosed between two sheets of creped tissue paper, each of which tissue paper sheets had a basis weight of l 1.5 lb. per 3,000 sq. ft. The resulting composite material was folded in the fold configuration illustrated in FIGS. 3 and 4 with a fold frequency of 4 folds per inch and a fold ratio of 0.57. The substantially horizontal folds were made to run in the crossmachine direction of the tissue paper enclosing sheets and were held in place, for convenience in handling the resulting absorbent, folded airfelt pad, by l/l6 inch wide embossing lines located on l /sinch centers and running across the folds.
The resulting absorbent, folded planar airfelt pad had a thickness of 0.175 inch, as folded, and was calendered between a rubber roll and a steel roll loaded to 35 lb. per linear inch to reduce the thickness to 0.120 inch. A piece of the absorbent, folded airfelt pad, measuring 16 inches in the fold direction and 12.5 inches in the cross fold direction with a weight of 26 grams, was assembled into a composite pad diaper having a topsheet and a bottom sheet as illustrated in FIGS. 7 and 8. The topsheet was a non-woven rayon fiber material having a basis weight of 13 lb. per 3,000 sq. ft., while the bottom sheet was a polyethylene sheet having a thickness of 0.001 inch.
The diaper was shown to hold 195 grams, or 7.5 times its dry absorbent, folded airfelt pad weight, of water while subjected to a compressive loading of 1 lb. per sq. inch to simulate in use pressures. A simulated test of tear under in use movement, using the test apparatus and method described above, was conducted on the diaper with the result that no tearing, or a tear grade of 0, was recorded. The diaper of this example was also found to be tear resistant, flushable by the method described above and otherwise satisfactory for use when subjected to actual wearing and soiling by an infant.
For comparison, a diaper with an absorbent pad weight of 25 grams was prepared in a similar way from identical materials, with the exception that the airfelt was not folded and additional airfelt was provided for equal weight, was found to hold only 169 grams or 6.5 times it dry weight of water. This comparison diaper had a tear grade of 3, evidencing a tearing of greater than 180 around the oscillated portion and unsatisfactory susceptibility to in use failure.
A composite pad assembled from an absorbent, folded airfelt pad, prepared from airfelt having an unfolded basis weight of 8 lb. per 3,000 sq. ft. and tissue having a basis weight of6 lb. per 3,000 sq. ft., using a fold ratio of 0.3 and a fold frequency of 1 per inch in the manner of this example I will be found to be tear and rupture resistant, absorbent and otherwise satisfactory for disposable article use as a diaper. The absorbent, folded airfelt pad of this example I assembled into a composite pad having a non-woven topsheet and a bottom sheet comprised of a plastic sheet with an outer non-woven layer, will be found suitable for use either as a sanitary napkin or as a bandage.
EXAMPLE II An absorbent, folded airfelt pad was formed by first preparing an airfelt from Southern softwood kraft fibers. The airfelt had a basis weight prior to folding of 48 lb. per 3,000 sq. ft., and was enclosed between two sheets of creped tissue paper, each of which has an unfolded basis weight of 11.5 lb. per 3,000 sq. ft. The resulting composite material was folded in the fold configuration illustrated in FIGS. 1 and 2 with a fold frequency of 2.7 folds per inch and a fold ratio of 0.57. The folds were made to run in the cross-machine direction of the tissue paper enclosing sheets and were held in place by 1/16 inch wide embossing lines located on 1%0 inch centers and running across the folds.
The resulting absorbent, folded airfelt pad cut to measure 16 inches in the folded direction and 12.5 inches in the cross fold direction and having a weight of 26 grams was assembled into a diaper having a topsheet and a bottom sheet as illustrated in FIG. 7. The topsheet was a non-woven rayon fiber material having a basis weight of 13 lb. per 3,000 sq. ft., while the bottom sheet was a polyethylene sheet having a thickness of0.00l inch.
The prepared diaper was shown to hold 200 grams, or 7.7 times its dry weight, of water while subjected to a compressive loading of 1 lb. per sq. in. to simulate in use pressures. A simulated test of tear under in use movement, using the test apparatus and method described above, was conducted on the diaper with the result that no tearing, or a tear grade of 0, was observed. Like the diaper of example I, the diaper of this example ll was found to be tear resistant, flushable by the method described above and otherwise satisfactory for use when subjected to actual wear by an infant.
A composite pad assembled from an absorbent, folded airfelt pad, prepared from airfelt having an unfolded basis weight of 200 lb. per 3,000 sq. ft. and tissue having an unfolded basis weight of 24 lb. per 3,000 sq. ft., with a fold ratio of 0.7 and a fold frequency of 2 per inch, will be found to be tear and rupture resistant, absorbent and otherwise satisfactory for disposable article use as a diaper or a bed pad.
An absorbent, folded airfelt pad was formed by first preparing an airfelt from Southern softwood kraft fibers. The airfelt had an unfolded basis weight of 72 lb. per 3,000 sq. ft., and was enclosed between two sheets of creped tissue paper, each of which tissue paper sheets had a basis weight of l 1.5 lb. per 3,000 sq. ft. The resulting composite material was folded in the fold configuration illustrated in FIGS. 3 and 4 with a fold frequency of3 folds per inch and a fold ratio of0.67. The folds were made to run in the cross-machine direction of the tissue paper enclosing sheets and were held in place by an embossed diamond pattern consisting of 1 inch machine direction by 2 inch cross-machine direction diamonds outlined by embossed lines with a width of three thirty-seconds inch.
The resulting absorbent, folded airfelt pad, cut to measure 16 inches in the fold direction and 12.5 inches in the cross fold direction, had a weight of 30 grams. The so cut piece of absorbent, folded airfelt pad was assembled into a diaper having a topsheet and a bottom sheet as illustrated in FIG. 7. The topsheet was a non-woven rayon fiber material having a basis weight of 13 lb. per 3,000 sq. ft., while the bottom sheet was a polyethylene sheet having a thickness of0.00l inch.
The diaper was shown to hold 231 grams, or 7.7 times its dry weight of water while subjected to a compressive loading of 1 lb. per sq. in. to simulate in use pressures. A simulated test of tear under in use movement, using the test apparatus and method described above, was conducted on the diaper with the result that a tear grade of l was recorded. Although this tear grade of 1 indicates a small amount of tear, less than of total tear around the test periphery, the diaper of this example III was found to be tear resistant, flushable and otherwise satisfactory for use when subjected to actual wear by an infant.
A composite pad prepared in the manner of this example 111, from an absorbent, folded airfelt pad, made from airfelt having an unfolded basis weight of 24 lb. per 3,000 sq. ft. and tissue having an unfolded basis weight of 6 lb. per 3,000 sq. ft., with a fold ratio of 0.4 and a fold frequency of 4 per inch, will be found to be tear and rupture resistant, absorbent and otherwise satisfactory for use as a diaper.
Those skilled in the art of disposable article manufacture will realize that, although the composite pad and absorbent, folded airfelt pad of the present invention have been described primarily in terms of their use in diapers, bandages and sanitary napkins, the possible uses of such pads are multitudinous. ln fact, the such pads can be used wherever the use situation ofa disposable article is such that the article requires or finds advantage in both absorbency and resistance to stress. Such situations are found, for example, in disposable bed clothes, bed pads, dental bibs and surgical drapes.
Therefore, while specific examples of embodiments of the present invention have been described above, it will be apparent that changes and modifications may be made in the described pad structures without departing from the spirit of the invention. It will be further understood that the examples cited and the procedures set forth are intended to be illustrative only and are not intended as limiting this invention, it being intended that all equivalents thereof be included within the scope of the appended claims.
Having thus described the invention, what is claimed is:
1. An absorbent, folded, planar airfelt pad for use in disposable articles, which airfelt pad is comprised of airfelt with glabrous surfaces and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length of about 0.3 to about 0.7.
2. An absorbent, folded, planar airfelt pad for use in disposable articles, which airfelt pad is comprised of airfelt having a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length ratio of about 0.3 to about 0.7.
3. The absorbent, folded, planar airfelt pad for use in disposable articles of claim 2 wherein the folds are stabilized by lines of embossing having a width of about one-sixteenth inch to about three thirty-seconds inch and the absorbent, folded airfelt pad thickness is about 0.030 inch to about 0.250 inch.
4. An absorbent, folded, planar airfelt pad for use in disposable articles, which airfelt pad is comprised of airfelt having a basis weight of about 24 lb. to about 100 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 10 lb. to about 12 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 2 to about 3 folds per inch together with a folded to unfolded length ratio of about 0.4 to about 0.5.
5. The absorbent, folded, planar airfelt pad for use in disposable articles of claim 4 wherein the substantially horizontal folds are stabilized by lines of embossing having a width of about one-sixteenth inch to about three thirtyseconds inch and the absorbent, folded airfelt pad thickness is about 0.070 inch to about 0.150 inch.
6. A composite pad for use as a disposable article, which composite pad is comprised of a topsheet and a bottom sheet with an absorbent, folded, planar airfelt pad disposed therebetween, which airfelt pad is comprised of airfelt having a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length ratio of about 0.3 to about 0.7.
7. The composite pad for use as a disposable article of claim 6 wherein the topsheet is a non-woven sheet, the bottom sheet is a plastic film and the disposable article is a diaper.
8. The composite pad for use in a disposable article of claim 6 wherein the topsheet is a non-woven sheet, the bottom sheet is a plastic film with an outer layer of non-woven sheet and the disposable article is a sanitary napkin.
* g;;g UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,653,382 Dated April 4, 197 2 Invent0r(s) Charles E. Easley and Charles L. Wosaba, II
It is certified that error appears in the above-identified patent and that said Letters Patent are'hereby corrected as shown below:
Column 3, line 19, "airfelt with glabrous surfaces" should read airfelt pad with glabrous surfaces- Column 4, line 10, "when he diaper" should read when the diaper-.
Column 4, line 33, after "0.5", insert Column 6, line 19, "one-sixteenth polyurethane" should read one-sixteenth inch polyurethane.
Column 6, line 66, "1 1/8 inch" should read 1 3/8 inch-.
Column 7, line 48, '1 1/8 0 inch" should read 1 3/8 inch-.
Column 7, line 51, "folded" should read fold.
Signed and sealed this 15th day of August 1972.
(SEAL) Attest:
EDWARD M. FLETCHER, JR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patent

Claims (8)

1. An absorbent, folded, planar airfelt pad for use in disposable articles, which airfelt pad is comprised of airfelt with glabrous surfaces and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length of about 0.3 to about 0.7.
2. An absorbent, folded, planar airfelt pad for use in disposable articles, which airfelt pad is comprised of airfelt having a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length ratio of about 0.3 to about 0.7.
3. The absorbent, folded, planar airfelt pad for use in disposable articles of claim 2 wherein the folds are stabilized by lines of embossing having a width of about one-sixteenth inch to About three thirty-seconds inch and the absorbent, folded airfelt pad thickness is about 0.030 inch to about 0.250 inch.
4. An absorbent, folded, planar airfelt pad for use in disposable articles, which airfelt pad is comprised of airfelt having a basis weight of about 24 lb. to about 100 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 10 lb. to about 12 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 2 to about 3 folds per inch together with a folded to unfolded length ratio of about 0.4 to about 0.5.
5. The absorbent, folded, planar airfelt pad for use in disposable articles of claim 4 wherein the substantially horizontal folds are stabilized by lines of embossing having a width of about one-sixteenth inch to about three thirty-seconds inch and the absorbent, folded airfelt pad thickness is about 0.070 inch to about 0.150 inch.
6. A composite pad for use as a disposable article, which composite pad is comprised of a topsheet and a bottom sheet with an absorbent, folded, planar airfelt pad disposed therebetween, which airfelt pad is comprised of airfelt having a basis weight of about 8 lb. to about 200 lb. per 3,000 sq. ft. with glabrous surfaces of tissue having a basis weight of about 6 lb. to about 24 lb. per 3,000 sq. ft. and has a multiplicity of substantially horizontal folds having a frequency of about 1 to about 4 folds per inch together with a folded to unfolded length ratio of about 0.3 to about 0.7.
7. The composite pad for use as a disposable article of claim 6 wherein the topsheet is a non-woven sheet, the bottom sheet is a plastic film and the disposable article is a diaper.
8. The composite pad for use in a disposable article of claim 6 wherein the topsheet is a non-woven sheet, the bottom sheet is a plastic film with an outer layer of non-woven sheet and the disposable article is a sanitary napkin.
US886878A 1969-12-22 1969-12-22 Expandable airfelt pad Expired - Lifetime US3653382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88687869A 1969-12-22 1969-12-22

Publications (1)

Publication Number Publication Date
US3653382A true US3653382A (en) 1972-04-04

Family

ID=25389981

Family Applications (1)

Application Number Title Priority Date Filing Date
US886878A Expired - Lifetime US3653382A (en) 1969-12-22 1969-12-22 Expandable airfelt pad

Country Status (8)

Country Link
US (1) US3653382A (en)
BE (1) BE760610A (en)
CA (1) CA940283A (en)
DE (1) DE2062790A1 (en)
FR (1) FR2075886B1 (en)
GB (1) GB1312370A (en)
NL (1) NL7018696A (en)
SE (1) SE384131B (en)

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837338A (en) * 1972-11-24 1974-09-24 Kendall & Co Conformable nonwoven bandage
US3885568A (en) * 1971-03-26 1975-05-27 Charles H Schaar Expandable article
US3913578A (en) * 1973-12-03 1975-10-21 Colgate Palmolive Co Disposable diaper
US4560380A (en) * 1982-09-29 1985-12-24 Flare Products, Inc. Disposable therapy diaper
US4568341A (en) * 1982-03-10 1986-02-04 James G. Mitchell Absorbent pads, incontinence care products and methods of production
US4853273A (en) * 1987-12-21 1989-08-01 Elmatco Products, Incorporated Drill board and method of making the same
US5141794A (en) * 1989-11-03 1992-08-25 At&T Bell Laboratories Superabsorbent article having relatively thin liquid absorbent portion
US5484430A (en) * 1990-12-19 1996-01-16 The Procter & Gamble Company Sanitary napkin having transversely segmented core
US5591148A (en) * 1994-04-08 1997-01-07 The Procter & Gamble Company Sanitary napkin having an independently displaceable central core segment
US5611790A (en) * 1990-06-18 1997-03-18 The Procter & Gamble Company Stretchable absorbent articles
US5658269A (en) * 1990-10-29 1997-08-19 The Procter & Gamble Company Extensible absorbent articles
US5674212A (en) * 1990-10-29 1997-10-07 The Procter & Gamble Company Extensible absorbent articles
US5695487A (en) * 1994-09-09 1997-12-09 Kimberly-Clark Worldwide, Inc. Z-directon liquid transport medium
US5713884A (en) * 1990-06-18 1998-02-03 The Procter & Gamble Company Stretchable absorbent articles
WO1999000093A1 (en) 1997-06-30 1999-01-07 The Procter & Gamble Company Absorbent article with multi-layered extensible wings
WO1999000094A1 (en) 1997-06-30 1999-01-07 The Procter & Gamble Company Extensible crimp seal for sanitary napkins
WO1999001518A1 (en) 1997-07-03 1999-01-14 E.I. Du Pont De Nemours And Company Method for making a photodurable aqueous titanium dioxide pigment slurry
WO1999042066A1 (en) * 1998-02-18 1999-08-26 Johnson & Johnson Inc. Absorbent article including a component layer having a hindrance to fluid flow across the layer
US5954705A (en) * 1995-06-13 1999-09-21 The Procter & Gamble Company Absorbent article
US6049023A (en) * 1997-12-31 2000-04-11 Kimberly-Clark Worldwide, Inc. Extensible absorbent article including a tearable layer
US6059764A (en) * 1990-06-18 2000-05-09 The Procter & Gamble Company Stretchable absorbent articles
WO2001015650A1 (en) * 1999-08-27 2001-03-08 Kimberly-Clark Worldwide, Inc. Absorbent article having pleated extensible absorbent layer
US6346097B1 (en) * 1997-08-08 2002-02-12 Kimberly-Clark Worldwide, Inc. Personal care product with expandable BM containment
US6500159B1 (en) * 1999-09-28 2002-12-31 Johnson & Johnson Industria E Comercio Ltda I 3170 Corrugated sanitary napkin
US20030014031A1 (en) * 1999-08-27 2003-01-16 Tanzer Richard Warren Incontinence garment having pleated extensible liquid retention layer
US20030124928A1 (en) * 2001-12-27 2003-07-03 Sherrod Earle H. Non-slip absorbent article
US20030236512A1 (en) * 2002-06-19 2003-12-25 Baker Andrew A. Absorbent core with folding zones for absorbency distribution
US20040166321A1 (en) * 2003-02-21 2004-08-26 Rippl Carl G. Non-slip portable absorbent article
US20050022298A1 (en) * 2003-07-31 2005-02-03 De Leon Maria E. Mat featuring a removable portion
AU780641B2 (en) * 1999-09-28 2005-04-07 Johnson & Johnson Industria E Comercio Ltda A hygienic napkin
US20050100713A1 (en) * 2001-04-20 2005-05-12 The Procter & Gamble Company Self-bonded corrugated fibrous web
US20050228357A1 (en) * 2004-04-09 2005-10-13 Uni-Charm Corporation Disposable diaper
US20050234421A1 (en) * 2004-04-14 2005-10-20 Uni-Charm Corporation Disposable diaper
US20060206091A1 (en) * 2005-03-10 2006-09-14 Tyco Healthcare Retail Services Ag Absorbent article having a channeled absorbent layer and method of making the same
US20070078422A1 (en) * 2005-09-30 2007-04-05 Tyco Healthcare Retail Services Ag Absorbent article configured for controlled deformation and method of making the same
US20070197988A1 (en) * 2006-02-23 2007-08-23 Select Medical Products, Inc. CPM pad with fiber filling
US20070207306A1 (en) * 2006-03-03 2007-09-06 New Pig Corporation Expanding tape barrier
US20080119810A1 (en) * 2006-11-22 2008-05-22 Uni-Charm Corporation Absorbent article and manufacturing method thereof
EP2415429A1 (en) * 2009-03-31 2012-02-08 Unicharm Corporation Absorbent article
EP2612960A1 (en) * 2010-08-31 2013-07-10 Unicharm Corporation Nonwoven fabric, method of manufacturing same, and absorbent article
US20170196734A1 (en) * 2014-05-29 2017-07-13 First Care Products Ltd. Wound dressing apparatus and method of use thereof
EP3461465A1 (en) * 2017-09-29 2019-04-03 Johnson & Johnson Consumer Inc. Extensible dressings
KR102109078B1 (en) * 2018-11-15 2020-05-12 아이엠 바이오(주) Laminated type gauze for strengthening elasticity and its manufacturing method thereof
CN112826667A (en) * 2019-11-22 2021-05-25 尤妮佳股份有限公司 Absorbent core for absorbent article and absorbent article comprising the same
RU2779570C2 (en) * 2017-09-29 2022-09-09 Джонсон энд Джонсон Консьюмер Инк. Stretchable dressings

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108382A (en) * 1980-08-12 1992-04-28 Timbale Corporation Nv Disposable containers
GR79970B (en) * 1983-08-15 1984-10-31 Personal Products Co
US4930942A (en) * 1986-12-22 1990-06-05 E. R. Squibb & Sons, Inc. Method of disposal of articles by flushing
US4830187A (en) * 1986-12-22 1989-05-16 E. R. Squibb & Sons, Inc. Means for disposal of articles by flushing and ostomy pouches particularly suited for such disposal
US4762738A (en) * 1986-12-22 1988-08-09 E. R. Squibb & Sons, Inc. Means for disposal of articles by flushing and ostomy pouches particularly suited for such disposal
US5650219A (en) * 1991-04-10 1997-07-22 Isolyser Co. Inc. Method of disposal of hot water soluble garments and like fabrics
US6048410A (en) * 1991-04-10 2000-04-11 Isolyser Company, Inc. Method of disposal of hot water soluble garments and like fabrics
US5871679A (en) * 1991-04-10 1999-02-16 Isolyser Company, Inc. Method of producing hot water soluble garments and like fabrics
US5620786A (en) * 1993-04-29 1997-04-15 Isolyser Co. Inc. Hot water soluble towels, sponges and gauzes
US5470653A (en) * 1994-08-05 1995-11-28 Isolyser Company, Inc. Disposable mop heads
US5661217A (en) * 1994-08-05 1997-08-26 Isolyser Company, Inc. Method of manufacturing monolithic structures from polyvinyl alcohol
US5707731A (en) * 1996-05-09 1998-01-13 Isolyser Company, Inc. Disposable cleaning articles
US5891812A (en) * 1996-10-11 1999-04-06 Isolyser Company, Inc. Liquid absorbable non-permeable fabrics and methods of making, using, and disposing thereof
DE19705737C2 (en) * 1997-02-14 2000-04-27 Spinnerei C B Goeldner Gmbh & Medical absorbent and process for its manufacture
EP3551147B1 (en) 2016-12-12 2023-08-09 Smith & Nephew PLC Wound dressing
CN112641358A (en) * 2020-08-27 2021-04-13 安徽蓝天巾被有限公司 Towel for children

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US810131A (en) * 1904-06-13 1906-01-16 American Absorbent Fiber Company Absorbent bandage.
US3395708A (en) * 1966-11-09 1968-08-06 Riegel Textile Corp Method for improving a fluffed fibrous wood pulp batt for use in sanitary products and the products thereof
US3430629A (en) * 1965-08-17 1969-03-04 Int Paper Canada Disposable diaper
US3441023A (en) * 1965-02-12 1969-04-29 Page Zellstoffkrepp Gmbh Absorption pad for the treatment of wounds and for infant care
US3481337A (en) * 1966-02-26 1969-12-02 Johnson & Johnson Corrugated diaper
US3525337A (en) * 1967-10-30 1970-08-25 Kimberly Clark Co Absorbent accordion pleated shaped pad with backing sheet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US810131A (en) * 1904-06-13 1906-01-16 American Absorbent Fiber Company Absorbent bandage.
US3441023A (en) * 1965-02-12 1969-04-29 Page Zellstoffkrepp Gmbh Absorption pad for the treatment of wounds and for infant care
US3430629A (en) * 1965-08-17 1969-03-04 Int Paper Canada Disposable diaper
US3481337A (en) * 1966-02-26 1969-12-02 Johnson & Johnson Corrugated diaper
US3395708A (en) * 1966-11-09 1968-08-06 Riegel Textile Corp Method for improving a fluffed fibrous wood pulp batt for use in sanitary products and the products thereof
US3525337A (en) * 1967-10-30 1970-08-25 Kimberly Clark Co Absorbent accordion pleated shaped pad with backing sheet

Cited By (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885568A (en) * 1971-03-26 1975-05-27 Charles H Schaar Expandable article
US3837338A (en) * 1972-11-24 1974-09-24 Kendall & Co Conformable nonwoven bandage
US3913578A (en) * 1973-12-03 1975-10-21 Colgate Palmolive Co Disposable diaper
US4568341A (en) * 1982-03-10 1986-02-04 James G. Mitchell Absorbent pads, incontinence care products and methods of production
US4560380A (en) * 1982-09-29 1985-12-24 Flare Products, Inc. Disposable therapy diaper
US4853273A (en) * 1987-12-21 1989-08-01 Elmatco Products, Incorporated Drill board and method of making the same
US5141794A (en) * 1989-11-03 1992-08-25 At&T Bell Laboratories Superabsorbent article having relatively thin liquid absorbent portion
US5713884A (en) * 1990-06-18 1998-02-03 The Procter & Gamble Company Stretchable absorbent articles
US5611790A (en) * 1990-06-18 1997-03-18 The Procter & Gamble Company Stretchable absorbent articles
US5702382A (en) * 1990-06-18 1997-12-30 The Procter & Gamble Company Extensible absorbent articles
US5824004A (en) * 1990-06-18 1998-10-20 The Procter & Gamble Company Stretchable absorbent articles
US6287288B1 (en) 1990-06-18 2001-09-11 The Procter & Gamble Company Stretchable absorbent articles
US6059764A (en) * 1990-06-18 2000-05-09 The Procter & Gamble Company Stretchable absorbent articles
US5658269A (en) * 1990-10-29 1997-08-19 The Procter & Gamble Company Extensible absorbent articles
US5674212A (en) * 1990-10-29 1997-10-07 The Procter & Gamble Company Extensible absorbent articles
US5683375A (en) * 1990-10-29 1997-11-04 The Procter & Gamble Company Extensible absorbent articles
US5484430A (en) * 1990-12-19 1996-01-16 The Procter & Gamble Company Sanitary napkin having transversely segmented core
US5591148A (en) * 1994-04-08 1997-01-07 The Procter & Gamble Company Sanitary napkin having an independently displaceable central core segment
US5695487A (en) * 1994-09-09 1997-12-09 Kimberly-Clark Worldwide, Inc. Z-directon liquid transport medium
US5954705A (en) * 1995-06-13 1999-09-21 The Procter & Gamble Company Absorbent article
WO1999000094A1 (en) 1997-06-30 1999-01-07 The Procter & Gamble Company Extensible crimp seal for sanitary napkins
WO1999000093A1 (en) 1997-06-30 1999-01-07 The Procter & Gamble Company Absorbent article with multi-layered extensible wings
WO1999001518A1 (en) 1997-07-03 1999-01-14 E.I. Du Pont De Nemours And Company Method for making a photodurable aqueous titanium dioxide pigment slurry
US6346097B1 (en) * 1997-08-08 2002-02-12 Kimberly-Clark Worldwide, Inc. Personal care product with expandable BM containment
US6049023A (en) * 1997-12-31 2000-04-11 Kimberly-Clark Worldwide, Inc. Extensible absorbent article including a tearable layer
WO1999042066A1 (en) * 1998-02-18 1999-08-26 Johnson & Johnson Inc. Absorbent article including a component layer having a hindrance to fluid flow across the layer
US7137971B2 (en) 1999-08-27 2006-11-21 Kimberly-Clark Worldwide, Inc. Incontinence garment having pleated extensible liquid retention layer
GB2369781A (en) * 1999-08-27 2002-06-12 Kimberly Clark Co Absorbent article having pleated extensible absorbent layer
US20030014031A1 (en) * 1999-08-27 2003-01-16 Tanzer Richard Warren Incontinence garment having pleated extensible liquid retention layer
GB2369781B (en) * 1999-08-27 2003-11-12 Kimberly Clark Co Absorbent article having pleated extensible absorbent layer
WO2001015650A1 (en) * 1999-08-27 2001-03-08 Kimberly-Clark Worldwide, Inc. Absorbent article having pleated extensible absorbent layer
US6500159B1 (en) * 1999-09-28 2002-12-31 Johnson & Johnson Industria E Comercio Ltda I 3170 Corrugated sanitary napkin
AU780641B2 (en) * 1999-09-28 2005-04-07 Johnson & Johnson Industria E Comercio Ltda A hygienic napkin
US7427434B2 (en) * 2001-04-20 2008-09-23 The Procter & Gamble Company Self-bonded corrugated fibrous web
US20050100713A1 (en) * 2001-04-20 2005-05-12 The Procter & Gamble Company Self-bonded corrugated fibrous web
US20030124928A1 (en) * 2001-12-27 2003-07-03 Sherrod Earle H. Non-slip absorbent article
US6911407B2 (en) 2001-12-27 2005-06-28 Kimberly-Clark Worldwide, Inc. Non-slip absorbent article
US20030236512A1 (en) * 2002-06-19 2003-12-25 Baker Andrew A. Absorbent core with folding zones for absorbency distribution
US20040166321A1 (en) * 2003-02-21 2004-08-26 Rippl Carl G. Non-slip portable absorbent article
US20050022298A1 (en) * 2003-07-31 2005-02-03 De Leon Maria E. Mat featuring a removable portion
US7766888B2 (en) * 2004-04-09 2010-08-03 Uni-Charm Corporation Disposable diaper with feces retaining pocket
US20050228357A1 (en) * 2004-04-09 2005-10-13 Uni-Charm Corporation Disposable diaper
US20050234421A1 (en) * 2004-04-14 2005-10-20 Uni-Charm Corporation Disposable diaper
US7500969B2 (en) 2004-04-14 2009-03-10 Uni-Charm Corporation Disposable diaper
US20060206091A1 (en) * 2005-03-10 2006-09-14 Tyco Healthcare Retail Services Ag Absorbent article having a channeled absorbent layer and method of making the same
US20070282291A1 (en) * 2005-03-10 2007-12-06 Robert Cole Absorbent article having a channeled absorbent layer and method of making the same
US20070282290A1 (en) * 2005-03-10 2007-12-06 Robert Cole Absorbent article having a channeled absorbent layer and method of making the same
US20070078422A1 (en) * 2005-09-30 2007-04-05 Tyco Healthcare Retail Services Ag Absorbent article configured for controlled deformation and method of making the same
US20070197988A1 (en) * 2006-02-23 2007-08-23 Select Medical Products, Inc. CPM pad with fiber filling
US20070207306A1 (en) * 2006-03-03 2007-09-06 New Pig Corporation Expanding tape barrier
US20080119810A1 (en) * 2006-11-22 2008-05-22 Uni-Charm Corporation Absorbent article and manufacturing method thereof
US8998871B2 (en) * 2006-11-22 2015-04-07 Uni-Charm Corporation Absorbent article with compressed channel portions
EP2415429A1 (en) * 2009-03-31 2012-02-08 Unicharm Corporation Absorbent article
EP2415429A4 (en) * 2009-03-31 2013-05-15 Unicharm Corp Absorbent article
US9084698B2 (en) 2009-03-31 2015-07-21 Unicharm Corporation Absorbent article with folded liquid-absorbent structure
EP2612960A1 (en) * 2010-08-31 2013-07-10 Unicharm Corporation Nonwoven fabric, method of manufacturing same, and absorbent article
EP2612960A4 (en) * 2010-08-31 2014-01-01 Unicharm Corp Nonwoven fabric, method of manufacturing same, and absorbent article
US10507139B2 (en) * 2014-05-29 2019-12-17 First Care Products Ltd. Wound dressing apparatus and method of use thereof
US20170196734A1 (en) * 2014-05-29 2017-07-13 First Care Products Ltd. Wound dressing apparatus and method of use thereof
US11224544B2 (en) 2017-09-29 2022-01-18 Johnson & Johnson Consumer Inc. Extensible dressings
JP2019063520A (en) * 2017-09-29 2019-04-25 ジョンソン・アンド・ジョンソン・コンシューマー・インコーポレイテッドJohnson & Johnson Consumer Inc. Extensible dressings
CN109602541A (en) * 2017-09-29 2019-04-12 强生消费者公司 Extendable dressing
EP3461465A1 (en) * 2017-09-29 2019-04-03 Johnson & Johnson Consumer Inc. Extensible dressings
CN109602541B (en) * 2017-09-29 2022-05-03 强生消费者公司 Extensible dressing
US11389335B2 (en) 2017-09-29 2022-07-19 Johnson & Johnson Consumer Inc. Extensible dressings
RU2779570C2 (en) * 2017-09-29 2022-09-09 Джонсон энд Джонсон Консьюмер Инк. Stretchable dressings
KR102109078B1 (en) * 2018-11-15 2020-05-12 아이엠 바이오(주) Laminated type gauze for strengthening elasticity and its manufacturing method thereof
CN112826667A (en) * 2019-11-22 2021-05-25 尤妮佳股份有限公司 Absorbent core for absorbent article and absorbent article comprising the same
JP2021079036A (en) * 2019-11-22 2021-05-27 ユニ・チャーム株式会社 Absorbent core for absorbent article, absorbent article including the absorbent core

Also Published As

Publication number Publication date
FR2075886B1 (en) 1973-02-02
CA940283A (en) 1974-01-22
BE760610A (en) 1971-06-21
FR2075886A1 (en) 1971-10-15
SE384131B (en) 1976-04-26
DE2062790A1 (en) 1971-07-01
GB1312370A (en) 1973-04-04
NL7018696A (en) 1971-06-24

Similar Documents

Publication Publication Date Title
US3653382A (en) Expandable airfelt pad
JP2514294B2 (en) Body side cover for absorbent articles
US4041951A (en) Absorptive structure having improved surface dryness and improved resistance to rewetting in-use
US3881490A (en) Thin, flexible absorbent pads
RU2597586C1 (en) Absorbent product for personal hygiene, having wings and protective strip
US4650481A (en) Crinkled, quilted absorbent pad
US5312386A (en) Disposable sanitary pad
US3426756A (en) Disposable diaper
US3769978A (en) Diaper system and absorbent pad therefor
US2952259A (en) Absorbent product
KR20090110359A (en) Absorptive article
JPH11506503A (en) Articles with soft absorbent pulp sheets
JP2004113783A (en) Absorptive article
TW201231025A (en) Absorptive article
JPS63267359A (en) Liquid dispersing system of absorbing pad
JP4719799B2 (en) Interlabial pad
CN108463198B (en) Absorbent commodity and method for manufacturing absorbent commodity
CA1105689A (en) Absorbent article with improved pad
KR100322311B1 (en) Biaxially corrugated flexible sheet material for absorbent articles
JP2002165830A (en) Surface sheet for absorptive article
TWI450708B (en) Absorbent items
CN108472180A (en) Absorbent commodity and method for manufacturing absorbent commodity
JP4712533B2 (en) Absorbent articles
EP0442223B1 (en) Disposable absorbent product
NZ198895A (en) Sanitary napkin with reservoir formed by compression of the fibrous batt