US20040091186A1 - Packaging bag with zipper - Google Patents
Packaging bag with zipper Download PDFInfo
- Publication number
- US20040091186A1 US20040091186A1 US10/700,901 US70090103A US2004091186A1 US 20040091186 A1 US20040091186 A1 US 20040091186A1 US 70090103 A US70090103 A US 70090103A US 2004091186 A1 US2004091186 A1 US 2004091186A1
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- Prior art keywords
- zipper
- bag
- resin
- packaging bag
- tapes
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
- B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
- B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
- B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
- B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
Definitions
- the present invention relates to a packaging bag with a zipper.
- a conventional packaging bag with zipper of this kind is known from Utility Model Registration No. 2557256, for example.
- a packaging bag is conventionally known wherein an openable and closable zipper which performs a male and female coupling action is provided at opposing positions of a bag in the vicinity of the opening end thereof, and in an integral fashion with the bag.
- a packaging bag of the kind disclosed in Utility Model Registration No. 2557256 described above which comprises an integrally provided openable and closable zipper performing a male and female coupling action, before opening or closing the zipper, the perimeter of the bag is closed by heat sealing along the edge adjacent to the opening end of the bag, and when the zipper is opened and the contents of the bag are to be removed, the heat sealed section along the edge adjacent to the opening end of the bag is cut and discarded. In this state, the zipper is opened and the contents are removed.
- the zipper is opened, and the contents removed, after cutting the heat seal section at the edge adjacent to the opening end of the bag, but during transportation of the product (a bag containing the contents), or the like, the contents (liquid contents) may pass through small gaps in the male/female engaging section of the zipper, due to the pressure of the contents, or the like, and collect inbetween the zipper section and the heat seal section along the edge adjacent to the opening end of the bag, and if, in this state, the end consumer who has purchased the product cuts the heat seal portion along the edge adjacent to the opening end of the bag, in order to remove the contents, then the liquid contents that have collected between the zipper section and the heat seal section along the edge adjacent to the opening end of the bag will spill out.
- the present invention was devised in order to resolve the aforementioned problem, an object thereof being to prevent contents from entering between the zipper section and the heat seal section along the edge adjacent to the opening end of the bag, during transportation, or the like.
- a packaging bag with zipper in which a male zipper tape and a female zipper tape are bonded to inner faces of respective front and rear side sheet sections, or rear and front side sheet sections, in the vicinity of the opening end of the bag.
- the upper end of the bag comes at the top when the bag is in an upright state.
- the opening end of the bag is located above a position where the zipper is disposed, and is closed by means of heat sealing.
- the respective zipper tapes are bonded together in at least a region below the engaging section of the zipper tapes, out of regions above and below the same engaging section, with heat sealing strength of a degree that allows the zipper tapes to be manually peeled apart, by means of an interface peeling action, an interlayer peeling action, or a cohesive peeling action.
- either one of the zipper tapes is made from a hot melt type adhesive resin, and the other zipper tape is made from a polyethylene type resin or a polypropylene type resin of the same kind as a material forming the inner layers of the bag.
- both zipper tapes are made from a polyethylene type resin or polypropylene type resin of the same type as the material forming the inner layers of the bag, and a hot melt type adhesive resin section is provided on one of the zipper tapes at least in a bonding region formed by heat sealing below the engaging section of the zipper tapes.
- one of the zipper tapes is made from a hot melt type adhesive resin
- the outer face of the other zipper tape is made from a polyethylene type resin or polypropylene type resin of the same type as the material forming the inner layers of the bag
- the inner face of the other zipper tape is made from a polyethylene type resin or polypropylene type resin of a different type from the material forming the inner layers of the bag.
- the inner faces of both zipper tapes are made from a polyethylene type resin or polypropylene type resin, and a hot melt type adhesive resin section is provided on the inner face of one of the zipper tapes, at least in a bonding region formed by heat sealing in a position below the engaging section of the zipper tapes.
- a hot melt type adhesive resin section which is to be bonded to the inner layer of the bag, is provided on the outer face of the zipper tape made from polyethylene type resin or polypropylene type resin.
- both zipper tapes are made from a resin containing a material comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin.
- a resin section containing a material comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin is provided on the inner faces of both zipper tapes, at least in the bonding region formed by heat sealing below the engaging section of the zipper tapes.
- the heat sealed section along the edge adjacent to the opening end of the packaging bag is cut, and in this state, the bonding region between the zipper tapes can be peeled apart readily with user's fingers, and the contents can be removed from the packaging bag.
- FIG. 1 is a perspective view of a packaging bag with zipper according to a first embodiment of the present invention
- FIG. 2 is an enlarged sectional view of a principal part of this packaging bag with zipper
- FIG. 3 is an enlarged sectional view of the principal part of this packaging bag with zipper, showing the bag in an open state;
- FIG. 4 is an enlarged sectional view of a principal part of a packaging bag with zipper according to a second embodiment, showing the bag in an open state;
- FIG. 5 is an enlarged sectional view of a principal part of a packaging bag with zipper according to a third embodiment, showing the bag in an open state;
- FIG. 6 is an enlarged sectional view of a principal part of a packaging bag with zipper according to a fourth embodiment, showing the bag in an open state.
- FIG. 1 to FIG. 3 show a first embodiment of the present invention.
- numeral 1 denotes a four-side seal type packaging bag, wherein a male zipper tape 4 and a female zipper tape 5 are bonded by heat sealing to the inner faces of respective sheet sections 2 , 3 on the front side and rear side (or vice versa) of the bag in the vicinity of the opening end of the packaging bag 1 .
- the sheet sections 2 , 3 forming the packaging bag 1 have a two-layer structure wherein the respective outer layers 2 a, 3 a are made from nylon film and the respective inner layers 2 b, 3 b are made from polyethylene film.
- the male zipper tape 4 and the female zipper tape 5 are bonded to the inner faces of the respective sheet sections 2 , 3 , in the vicinity of the opening end of the packaging bag 1 located at the upper end of the packaging bag 1 when the bag is in an upright state, and more specifically, in a position slightly below the upper end of the packaging bag 1 , and these zipper tapes are fabricated from materials of the kinds described below.
- A is a hot melt type adhesive resin
- B is a polypropylene type resin
- a polyethylene type resin layer 6 and a hot melt type adhesive resin layer 7 are formed respectively by combined extrusion on the material A forming the male zipper tape 4 and material B forming the female zipper tape 5 , on the faces thereof which oppose the inner faces 2 b, 3 b of the respective sheet sections 2 , 3 .
- the male zipper tape 4 and the female zipper tape 5 are heat sealed, respectively, onto the inner face of the sheet section 2 and the inner face of the sheet section, at a temperature of 180° C., for example, a sealing time of one second, and a sealing pressure of 20 N/cm 2 , then the polyethylene type resin layer 6 of the zipper tape 4 and the inner layer 2 b of the polyethylene film of the sheet section 2 fuse together, and the hot melt type adhesive resin layer 7 of the zipper tape 5 fuses with the inner layer 3 b of the polyethylene film of the sheet section 3 .
- the polyethylene type resin layer 6 of the zipper tape 4 and the polyethylene film of the inner layer 2 b of the sheet section 2 are of the same type and become completely fused together, and the hot melt type adhesive resin layer 7 of the zipper tape 5 and the polyethylene film of the inner layer 3 b of the sheet section 3 are bonded together by a heat sealing strength of approximately 5 N/15 mm.
- the hot melt type adhesive resin has characteristics whereby, when heated, it bonds with polyolefin type resins, such as polyethylene, and has a heat sealing strength with polyolefin type resins of 5 N/15 mm or above.
- the respective zipper tapes 4 , 5 are bonded together by heat sealing along a lower end in the width direction of the zipper portion when the packaging bag 1 is in an upright state, in such a manner that the zipper tapes can be peeled apart by an interface peeling action.
- Numeral 8 denotes the bonding region between the zipper tapes 4 , 5 . Since the material of the zipper tape 4 is a hot melt type adhesive resin, and the material of the zipper tape 5 is a polypropylene type resin, then the heat sealing strength will be approximately the aforementioned figure of 5 N/15 mm. This heat sealing strength of approximately 5 N/15 mm is of a degree that allows the zipper tapes to be peeled apart readily by hand.
- a resin suitable for bonding the zipper tapes 4 , 5 together in such a manner that they can be peeled apart by an interface peeling action for example, a resin formed from a resin composition comprising at least one type of resin selected from a group comprising ethylene ethylacrylate copolymer comprising a main ingredient of ethylene vinyl acetate copolymer manufactured by Hirodine Corp., and petroleum resins, turpentine resins and rosin type resins.
- the material of the male zipper tape 4 is stated as a hot melt type adhesive resin
- the material of the female zipper tape 5 is stated as a polypropylene type resin, but a reverse configuration is also possible.
- a hot melt type adhesive resin layer is formed on the male zipper tape 4
- a polyethylene type resin layer is formed on the female zipper tape 5 .
- the packaging bag 1 was a rectangular seal type bag, but it is also possible to apply it to a gusset type bag, butt-seam bag, standing pack type bag, or the like.
- the respective zipper tapes 4 , 5 are bonded together along the lower end in the width direction of the zipper portion when the packaging bag 1 is in an upright state, with a heat sealing strength of a degree that allows the zipper tapes to be peeled apart readily by hand, so that there will be no infiltration of liquid contents through gaps in the engaging section 9 between the zipper tapes 4 , 5 , during transportation, or the like.
- the heat sealing strength of the bonding region 8 between the zipper tapes 4 , 5 is approximately the same as the heat sealing strength between the inner face of the packaging bag 1 and the female zipper tape 5 provided with a hot melt type adhesive resin layer 7 made from a polypropylene type resin as described above, but since the bonding region 8 is disposed in the end portion below the position of the zipper, then separation between the female zipper tape 5 and the packaging bag 1 is not liable to occur when the bonding region 8 below the zipper is peeled apart manually with the user's fingers.
- a bonding region 8 is provided between the zipper tapes 4 , 5 in an end region below the position in which the zipper is disposed, but in addition to this bonding region 8 , it is also possible to provide a bonding region between the zipper tapes 4 , 5 in a position slightly below the end portion located above the zipper position.
- the two zipper tapes 4 , 5 are bonded together in such a manner that they can be peeled apart by an interface peeling action, by a heat sealing strength of a degree which permits the tapes to be peeled apart manually, at a position below the engaging section 9 of the zipper tapes 4 , 5 , but it is also possible for them to be bonded on the basis of an interlayer peeling action or a cohesive peeling action.
- a hot melt type adhesive resin used for forming a cohesive peel it would be suitable to use a resin having a polyolefin known as VMX (registered trademark) manufactured by Mitsubishi Chemical Corp.
- a main ingredient which comprises a polymer alloy of a multi-component polymer in which non-crystalline vinyl polymer is contained in a uniform manner in a polyolefin resin which has been grafted with a radical polymerisation monomer, and a polymer in which styrene is dispersed in the dispersion phase of a polyolefin.
- the packaging bag 1 is made from a synthetic resin fabricated from sheet sections 2 , 3 having a two-layer structure comprising nylon film in the outer layers 2 a, 3 a, and polyethylene film in the inner layers 2 b, 3 b, but the materials used are not limited in particular to these.
- a synthetic resin film such as a polyethylene film or a polypropylene film, or the like, is used to fabricate the inner layers, due to the requirements of heat sealing, it is possible to use a material other than a synthetic resin, such as aluminium foil, paper, rayon paper, or the like, as a material to be laminated on the outer sides of the inner layers.
- a polyethylene type resin layer 6 and a hot melt type adhesive resin layer 7 are formed respectively on the faces opposing the inner layers 2 b, 3 b of the respective sheet sections 2 , 3 , but whilst the hot melt type adhesive resin layer 7 provided on the side of the female zipper tape 5 made from a polypropylene type resin is required, it is possible to omit the polyethylene type resin layer 6 provided on the side of the male zipper tape 4 made from a hot melt type adhesive resin.
- the male zipper tape or the female zipper tape from a hot melt type adhesive resin
- the other zipper tape made from a polyethylene type resin since the other zipper tape made from a polyethylene type resin is of the same type as the polyethylene film on the inner layer 3 b of the sheet section 3 , it will fuse completely with same, and the zipper tape made from a hot melt type adhesive resin and the polyethylene film on the inner layer 4 b of the sheet section 4 will be bonded together by a heat sealing strength of approximately 5 N/15 mm, similarly to the embodiment described above.
- the heat sealing strength between the zipper tapes may also be approximately 5 N/15 mm, and the two zipper tapes may be bonded together on the basis of an interface peeling action, as in the embodiment described above, or a interlayer peeling action, or a cohesive peeling action.
- a composition may also be adopted wherein one of the zipper tapes is made from a hot melt type adhesive resin, and the outer face of the other zipper tape is made from a polyethylene type resin, whilst the inner face thereof is made from a polypropylene type resin which is different to the material forming the inner layer of the packaging bag 1 .
- the zipper tapes 4 , 5 are bonded by heat sealing to the inner faces of the respective sheet sections 2 , 3 of the packaging bag 1 , but it is also possible for the two zipper tapes 4 , 5 to be installed on the inner faces of the respective sheet sections 2 , 3 of the packaging bag 1 by being laid respectively over the inner faces of the sheet sections 2 , 3 of the packaging bag 1 in a sheet state, and bonded to same, whilst the zipper tapes 4 , 5 are in a molten state directly after molten extrusion.
- FIG. 4 shows a second embodiment of the present invention.
- the second embodiment shown in FIG. 4 is a modification of the first embodiment shown in FIGS. 1. to 3 , and whereas in the first embodiment, the male zipper tape 4 and the hot melt type adhesive resin layer 7 provided on the outer face side of the female zipper tape 5 are made entirely of a hot melt type adhesive resin, in this second embodiment, the male zipper tape 4 is made from a polyethylene type resin of the same type as the inner layer 2 b of the packaging bag 1 , and the female zipper tape 5 is made from a polypropylene type resin, a section 11 made from a hot melt type adhesive resin being provided on the inner face of the male zipper tape 4 , in the vicinity of the bonding region 8 of the two zipper tapes 4 , 5 , and a section 12 made from a hot melt type adhesive resin being provided on the entire outer face side of the female zipper tape 5 .
- FIG. 5 shows a third embodiment of the present invention.
- the male zipper tape 4 and the female zipper tape 5 are both made from a polyethylene type resin of the same type as forming the inner layers 2 b, 3 b of the packaging bag 1 , and a section 13 made from a hot melt type adhesive resin is provided on the inner face of the female zipper tape 5 , only in the vicinity of the bonding region 8 of the zipper tapes 4 , 5 .
- both the zipper tapes 4 , 5 are made from a resin containing a random mixture of a straight-chain type low-density polyethylene resin and a polybutene-1 resin, for example, as means for bonding the zipper tapes 4 , 5 together in a readily peelable manner, in a position below the engaging section 9 , with heat sealing strength of a degree that allows the zipper tapes to be manually peeled apart.
- the bonding region 8 along the lower end section of the zipper tapes 4 , 5 fabricated from the foregoing material will not couple completely, and hence it will be possible to peel apart the bonding region 8 of the zipper tapes 4 , 5 , readily and manually, by means of a cohesive peeling action.
- FIG. 6 shows a fourth embodiment of the present invention.
- both of the zipper tapes 4 , 5 are made from a polyethylene type resin of the same type as forming the inner layers 2 b, 3 b of the packaging bag 1 , and resin sections 14 , 15 containing a resin comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin are provided on the inner faces of the two zipper tapes 4 , 5 , at least in the vicinity of the bonding region 8 located below the engaging section 9 of the zipper tapes 4 , 5 .
- the respective zipper tapes 4 , 5 may have a structure comprising three or more layers.
- a adhesive resin a material other than a polyethylene type resin or a polypropylene type resin, a hot melt type adhesive resin, or a resin containing a random mixture of a straight-chain type low-density polyethylene type resin and a polybutene-1 resin.
- the bonding region 9 of the zipper tapes 4 , 5 is bonded with a heat seal strength of approximately 5 N/15 mm, but it may be sufficient if the heat sealing strength is 1 N/15 mm or above.
Abstract
A packaging bag with zipper is provided that prevents contents from entering between a zipper section and a heat seal section along the edge adjacent to an opening end of the bag, during transportation for example. For this purpose, the packaging bag has a male zipper tape and a female zipper tape bonded to inner faces of the front and rear side sheet sections, or vice versa, in the vicinity of the opening end which comes at the top when the bag is in an upright state. The opening end thus located above the position of the zipper is closed by heat sealing. The zipper tapes are bonded together at least in a region below the engaging section, out of regions above and below the engaging section, with heat sealing strength of a degree that allows the zipper tapes to peel apart by an action of interface peeling, interlayer peeling, or cohesive peeling.
Description
- 1. Field of the Invention
- The present invention relates to a packaging bag with a zipper.
- 2. Description of the Related Art
- A conventional packaging bag with zipper of this kind is known from Utility Model Registration No. 2557256, for example. In other words, a packaging bag is conventionally known wherein an openable and closable zipper which performs a male and female coupling action is provided at opposing positions of a bag in the vicinity of the opening end thereof, and in an integral fashion with the bag.
- In a packaging bag of the kind disclosed in Utility Model Registration No. 2557256 described above, which comprises an integrally provided openable and closable zipper performing a male and female coupling action, before opening or closing the zipper, the perimeter of the bag is closed by heat sealing along the edge adjacent to the opening end of the bag, and when the zipper is opened and the contents of the bag are to be removed, the heat sealed section along the edge adjacent to the opening end of the bag is cut and discarded. In this state, the zipper is opened and the contents are removed.
- Therefore, with a packaging bag with zipper such as that described above, the zipper is opened, and the contents removed, after cutting the heat seal section at the edge adjacent to the opening end of the bag, but during transportation of the product (a bag containing the contents), or the like, the contents (liquid contents) may pass through small gaps in the male/female engaging section of the zipper, due to the pressure of the contents, or the like, and collect inbetween the zipper section and the heat seal section along the edge adjacent to the opening end of the bag, and if, in this state, the end consumer who has purchased the product cuts the heat seal portion along the edge adjacent to the opening end of the bag, in order to remove the contents, then the liquid contents that have collected between the zipper section and the heat seal section along the edge adjacent to the opening end of the bag will spill out.
- The present invention was devised in order to resolve the aforementioned problem, an object thereof being to prevent contents from entering between the zipper section and the heat seal section along the edge adjacent to the opening end of the bag, during transportation, or the like.
- In order to achieve this object, the present invention is devised as follows:
- Provided by the present invention is a packaging bag with zipper, in which a male zipper tape and a female zipper tape are bonded to inner faces of respective front and rear side sheet sections, or rear and front side sheet sections, in the vicinity of the opening end of the bag. The upper end of the bag comes at the top when the bag is in an upright state. The opening end of the bag is located above a position where the zipper is disposed, and is closed by means of heat sealing. The respective zipper tapes are bonded together in at least a region below the engaging section of the zipper tapes, out of regions above and below the same engaging section, with heat sealing strength of a degree that allows the zipper tapes to be manually peeled apart, by means of an interface peeling action, an interlayer peeling action, or a cohesive peeling action.
- In the packaging bag with zipper, either one of the zipper tapes is made from a hot melt type adhesive resin, and the other zipper tape is made from a polyethylene type resin or a polypropylene type resin of the same kind as a material forming the inner layers of the bag.
- In the packaging bag with zipper, both zipper tapes are made from a polyethylene type resin or polypropylene type resin of the same type as the material forming the inner layers of the bag, and a hot melt type adhesive resin section is provided on one of the zipper tapes at least in a bonding region formed by heat sealing below the engaging section of the zipper tapes.
- In the packaging bag with zipper, one of the zipper tapes is made from a hot melt type adhesive resin, the outer face of the other zipper tape is made from a polyethylene type resin or polypropylene type resin of the same type as the material forming the inner layers of the bag, and the inner face of the other zipper tape is made from a polyethylene type resin or polypropylene type resin of a different type from the material forming the inner layers of the bag.
- In the packaging bag with zipper, the inner faces of both zipper tapes are made from a polyethylene type resin or polypropylene type resin, and a hot melt type adhesive resin section is provided on the inner face of one of the zipper tapes, at least in a bonding region formed by heat sealing in a position below the engaging section of the zipper tapes.
- In the packaging bag with zipper, a hot melt type adhesive resin section which is to be bonded to the inner layer of the bag, is provided on the outer face of the zipper tape made from polyethylene type resin or polypropylene type resin.
- In the packaging bag with zipper, both zipper tapes are made from a resin containing a material comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin.
- In the packaging bag with zipper, a resin section containing a material comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin is provided on the inner faces of both zipper tapes, at least in the bonding region formed by heat sealing below the engaging section of the zipper tapes.
- According to the foregoing, by closing and bonding two zipper tapes together by heat sealing in at least a position below the engaging section of the male zipper tape and the female zipper tape each bonded by heat sealing to the inner faces of the packaging bag in the vicinity of the opening end of the bag, liquid contents can be prevented from leaking via gaps in the engaging section between the zipper tapes. And no contents accumulate between the zipper section and the heat seal section along the edge of the opening end. By bonding together the two zipper tapes with heat sealing strength of a degree that allows the zipper tapes to be manually peeled apart, in at least a position below the engaging section of the zipper tapes, by means of an interface peeling action, an interlayer peeling action or a cohesive peeling action. Then when the contents are to be taken out from the packaging bag, the heat sealed section along the edge adjacent to the opening end of the packaging bag is cut, and in this state, the bonding region between the zipper tapes can be peeled apart readily with user's fingers, and the contents can be removed from the packaging bag.
- FIG. 1 is a perspective view of a packaging bag with zipper according to a first embodiment of the present invention;
- FIG. 2 is an enlarged sectional view of a principal part of this packaging bag with zipper;
- FIG. 3 is an enlarged sectional view of the principal part of this packaging bag with zipper, showing the bag in an open state;
- FIG. 4 is an enlarged sectional view of a principal part of a packaging bag with zipper according to a second embodiment, showing the bag in an open state;
- FIG. 5 is an enlarged sectional view of a principal part of a packaging bag with zipper according to a third embodiment, showing the bag in an open state; and
- FIG. 6 is an enlarged sectional view of a principal part of a packaging bag with zipper according to a fourth embodiment, showing the bag in an open state.
- FIG. 1 to FIG. 3 show a first embodiment of the present invention.
- In FIG. 1 to FIG. 3,
numeral 1 denotes a four-side seal type packaging bag, wherein amale zipper tape 4 and afemale zipper tape 5 are bonded by heat sealing to the inner faces ofrespective sheet sections packaging bag 1. - The
sheet sections packaging bag 1 have a two-layer structure wherein the respectiveouter layers inner layers male zipper tape 4 and thefemale zipper tape 5 are bonded to the inner faces of therespective sheet sections packaging bag 1 located at the upper end of thepackaging bag 1 when the bag is in an upright state, and more specifically, in a position slightly below the upper end of thepackaging bag 1, and these zipper tapes are fabricated from materials of the kinds described below. - For example, taking the material of the
male zipper tape 4 as A and the material of thefemale zipper tape 5 as B, then A is a hot melt type adhesive resin and B is a polypropylene type resin, and a polyethylenetype resin layer 6 and a hot melt typeadhesive resin layer 7 are formed respectively by combined extrusion on the material A forming themale zipper tape 4 and material B forming thefemale zipper tape 5, on the faces thereof which oppose theinner faces respective sheet sections male zipper tape 4 and thefemale zipper tape 5 are heat sealed, respectively, onto the inner face of thesheet section 2 and the inner face of the sheet section, at a temperature of 180° C., for example, a sealing time of one second, and a sealing pressure of 20 N/cm2, then the polyethylenetype resin layer 6 of thezipper tape 4 and theinner layer 2 b of the polyethylene film of thesheet section 2 fuse together, and the hot melt typeadhesive resin layer 7 of thezipper tape 5 fuses with theinner layer 3 b of the polyethylene film of thesheet section 3. In this case, the polyethylenetype resin layer 6 of thezipper tape 4 and the polyethylene film of theinner layer 2 b of thesheet section 2 are of the same type and become completely fused together, and the hot melt typeadhesive resin layer 7 of thezipper tape 5 and the polyethylene film of theinner layer 3 b of thesheet section 3 are bonded together by a heat sealing strength of approximately 5 N/15 mm. In other words, it was found on the basis of experimentation, that the hot melt type adhesive resin has characteristics whereby, when heated, it bonds with polyolefin type resins, such as polyethylene, and has a heat sealing strength with polyolefin type resins of 5 N/15 mm or above. - Furthermore, in the
packaging bag 1 with zipper according to the present embodiment, therespective zipper tapes packaging bag 1 is in an upright state, in such a manner that the zipper tapes can be peeled apart by an interface peeling action. Numeral 8 denotes the bonding region between thezipper tapes zipper tape 4 is a hot melt type adhesive resin, and the material of thezipper tape 5 is a polypropylene type resin, then the heat sealing strength will be approximately the aforementioned figure of 5 N/15 mm. This heat sealing strength of approximately 5 N/15 mm is of a degree that allows the zipper tapes to be peeled apart readily by hand. - Furthermore, since the
engaging section 9 of themale zipper tape 4 and thefemale zipper tape 5 would be deformed if heated were applied thereto, only the end regions above and below the position of the zipper are heat sealed, by sandwiching them respectively between seal bars from the outer sides. - Various types of hot melt type adhesive resin are known, but in the present embodiment, it is possible to use, as a resin suitable for bonding the
zipper tapes - Moreover, in the embodiment described above, the material of the
male zipper tape 4 is stated as a hot melt type adhesive resin, and the material of thefemale zipper tape 5 is stated as a polypropylene type resin, but a reverse configuration is also possible. In this case, a hot melt type adhesive resin layer is formed on themale zipper tape 4, and a polyethylene type resin layer is formed on thefemale zipper tape 5. - Furthermore, in the embodiment described above, the
packaging bag 1 was a rectangular seal type bag, but it is also possible to apply it to a gusset type bag, butt-seam bag, standing pack type bag, or the like. - Contents are filled into the interior of the
packaging bag 1 provided with a zipper as described above, and the filled opening of thepackaging bag 1 is finally closed by heat sealing. Numeral 10 denotes the heat sealed section about the periphery of thepackaging bag 1. - As described above, in the present embodiment, the
respective zipper tapes packaging bag 1 is in an upright state, with a heat sealing strength of a degree that allows the zipper tapes to be peeled apart readily by hand, so that there will be no infiltration of liquid contents through gaps in theengaging section 9 between thezipper tapes - Therefore, when the contents are to be removed from the
packaging bag 1, by cutting and detaching theheat seal section 10 along the edge adjacent to the opening end of thepackaging bag 1, and then opening the zipper in this state and peeling apart thebonding region 8 in the portion below the position of the zipper, by using one's fingers, it is possible to extract the contents from thepackaging bag 1. The heat sealing strength of thebonding region 8 between thezipper tapes packaging bag 1 and thefemale zipper tape 5 provided with a hot melt typeadhesive resin layer 7 made from a polypropylene type resin as described above, but since thebonding region 8 is disposed in the end portion below the position of the zipper, then separation between thefemale zipper tape 5 and thepackaging bag 1 is not liable to occur when thebonding region 8 below the zipper is peeled apart manually with the user's fingers. In the embodiment illustrated in the drawings, abonding region 8 is provided between thezipper tapes bonding region 8, it is also possible to provide a bonding region between thezipper tapes - Furthermore, in the embodiment described above, the two
zipper tapes engaging section 9 of thezipper tapes - Furthermore, in the embodiment described above, the
packaging bag 1 is made from a synthetic resin fabricated fromsheet sections outer layers inner layers - Moreover, in the embodiment described above, in the
male zipper tape 4 made from a hot melt type adhesive resin and thefemale zipper tape 5 made from a propylene type resin, a polyethylenetype resin layer 6 and a hot melt typeadhesive resin layer 7 are formed respectively on the faces opposing theinner layers respective sheet sections adhesive resin layer 7 provided on the side of thefemale zipper tape 5 made from a polypropylene type resin is required, it is possible to omit the polyethylenetype resin layer 6 provided on the side of themale zipper tape 4 made from a hot melt type adhesive resin. Moreover, it is also possible to make the male zipper tape or the female zipper tape from a hot melt type adhesive resin, and to make the other zipper tape from a polyethylene type resin, and in this case, since the other zipper tape made from a polyethylene type resin is of the same type as the polyethylene film on theinner layer 3 b of thesheet section 3, it will fuse completely with same, and the zipper tape made from a hot melt type adhesive resin and the polyethylene film on the inner layer 4 b of thesheet section 4 will be bonded together by a heat sealing strength of approximately 5 N/15 mm, similarly to the embodiment described above. Moreover, the heat sealing strength between the zipper tapes may also be approximately 5 N/15 mm, and the two zipper tapes may be bonded together on the basis of an interface peeling action, as in the embodiment described above, or a interlayer peeling action, or a cohesive peeling action. Furthermore, a composition may also be adopted wherein one of the zipper tapes is made from a hot melt type adhesive resin, and the outer face of the other zipper tape is made from a polyethylene type resin, whilst the inner face thereof is made from a polypropylene type resin which is different to the material forming the inner layer of thepackaging bag 1. - Furthermore, in the embodiment described above, the
zipper tapes respective sheet sections packaging bag 1, but it is also possible for the twozipper tapes respective sheet sections packaging bag 1 by being laid respectively over the inner faces of thesheet sections packaging bag 1 in a sheet state, and bonded to same, whilst thezipper tapes - FIG. 4 shows a second embodiment of the present invention.
- The second embodiment shown in FIG. 4 is a modification of the first embodiment shown in FIGS. 1. to3, and whereas in the first embodiment, the
male zipper tape 4 and the hot melt typeadhesive resin layer 7 provided on the outer face side of thefemale zipper tape 5 are made entirely of a hot melt type adhesive resin, in this second embodiment, themale zipper tape 4 is made from a polyethylene type resin of the same type as theinner layer 2 b of thepackaging bag 1, and thefemale zipper tape 5 is made from a polypropylene type resin, asection 11 made from a hot melt type adhesive resin being provided on the inner face of themale zipper tape 4, in the vicinity of thebonding region 8 of the twozipper tapes section 12 made from a hot melt type adhesive resin being provided on the entire outer face side of thefemale zipper tape 5. It is also possible to provide a section made from a polyethylene type resin of the same type as theinner layer 3 b of thepackaging bag 1, instead of thesection 12 made from a hot melt type adhesive resin. Even if a section of a hot melt type adhesive resin is provided in the minimum necessary area at a position below the engagingsection 9 of thezipper tapes male zipper tape 4 is made from a hot melt type adhesive resin, then thesection 11 made from a hot melt type adhesive resin becomes unnecessary. - FIG. 5 shows a third embodiment of the present invention.
- In the third embodiment shown in FIG. 5, the
male zipper tape 4 and thefemale zipper tape 5 are both made from a polyethylene type resin of the same type as forming theinner layers packaging bag 1, and asection 13 made from a hot melt type adhesive resin is provided on the inner face of thefemale zipper tape 5, only in the vicinity of thebonding region 8 of thezipper tapes - Furthermore, both the
zipper tapes zipper tapes section 9, with heat sealing strength of a degree that allows the zipper tapes to be manually peeled apart. Thus, thebonding region 8 along the lower end section of thezipper tapes bonding region 8 of thezipper tapes - FIG. 6 shows a fourth embodiment of the present invention.
- In the fourth embodiment shown in FIG. 6, both of the
zipper tapes inner layers packaging bag 1, andresin sections zipper tapes bonding region 8 located below the engagingsection 9 of thezipper tapes bonding region 8 in the lower end section of thezipper tapes bonding region 8 of thezipper tapes - In the embodiment illustrated in the drawings, the
respective zipper tapes zipper tapes - Furthermore, in the foregoing description, the
bonding region 9 of thezipper tapes
Claims (8)
1. A packaging bag with zipper, having a male zipper tape and a female zipper tape bonded to inner faces of respective front side and rear side sheet sections, or rear side and front side sheet sections, in a vicinity of an opening end of the bag located at an upper end of the bag when said bag is in an upright state, the opening end of the bag being located above a position where the zipper is disposed and being closed by means of heat sealing, wherein
the respective zipper tapes are bonded together in at least a region below an engaging section of said zipper tapes, out of regions below and above the engaging section, with heat sealing strength of a degree that allows the zipper tapes to be manually peeled apart, by means of an interface peeling action, an interlayer peeling action, or a cohesive peeling action.
2. The packaging bag with zipper according to claim 1 , wherein one of the zipper tapes is made from a hot melt type adhesive resin, and the other zipper tape is made from a polyethylene type resin or polypropylene type resin of a same kind as a material forming inner layers of the bag.
3. The packaging bag with zipper according to claim 1 , wherein both zipper tapes are made from a polyethylene type resin or polypropylene type resin of a same kind as a material forming inner layers of the bag, and a hot melt type adhesive resin section is provided on one of the zipper tapes at least in a bonding region formed by heat sealing below the engaging section of the zipper tapes.
4. The packaging bag with zipper according to claim 1 , wherein one of the zipper tapes is made from a hot melt type adhesive resin, and the other zipper tape is made to have an outer face made from a polyethylene type resin or polypropylene type resin of a same kind as a material forming inner layers of the bag, and to have an inner face made from a polyethylene type resin or polypropylene type resin of a different kind from the material forming the inner layers of the bag.
5. The packaging bag with zipper according to claim 1 , wherein the inner faces of both zipper tapes are made from a polyethylene type resin or polypropylene type resin, and a hot melt type adhesive resin section is provided on the inner face of one of the zipper tapes, at least in a bonding region formed by heat sealing below the engaging section of the zipper tapes.
6. The packaging bag with zipper according to claim 1 , wherein a hot melt type adhesive resin section to be bonded to the inner layer of the bag, is provided on an outer face of a zipper tape made from a polyethylene type resin or polypropylene type resin.
7. The packaging bag with zipper according to claim 1 , wherein both zipper tapes are made from a resin containing a material comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin.
8. The packaging bag with zipper according to claim 1 , wherein a resin section containing a material comprising a random mixture of a straight-chain low-density polyethylene type resin and a polybutene-1 resin is provided on the inner faces of both zipper tapes, at least in a bonding region formed by heat sealing below the engaging section of the zipper tapes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002323230 | 2002-11-07 | ||
JP2002-323230 | 2002-11-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040091186A1 true US20040091186A1 (en) | 2004-05-13 |
Family
ID=32105470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/700,901 Abandoned US20040091186A1 (en) | 2002-11-07 | 2003-11-04 | Packaging bag with zipper |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040091186A1 (en) |
EP (1) | EP1418131A1 (en) |
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US20050042664A1 (en) * | 2003-08-22 | 2005-02-24 | Medimmune, Inc. | Humanization of antibodies |
US20060285778A1 (en) * | 2005-06-01 | 2006-12-21 | May Timothy J | Recloseable zipper with sealant on inner and outer surfaces of closure members |
US20070183692A1 (en) * | 2006-02-08 | 2007-08-09 | Pawloski James C | Reclosable pouch and zipper for a reclosable pouch |
US20090022435A1 (en) * | 2006-01-27 | 2009-01-22 | Kenichi Tanaka | Zipper tape, packing bag with zipper tape and apparatus for producing packing bag with zipper tape |
US20090119889A1 (en) * | 2005-11-08 | 2009-05-14 | Kenichi Tanaka | Interlock tool, bag making use thereof and process for producing them |
US20090300891A1 (en) * | 2005-02-22 | 2009-12-10 | Yoshinori Nanba | Tape with interlocking device |
US20100014787A1 (en) * | 2006-07-19 | 2010-01-21 | Ryo Katada | Packaging bag with fastener tape |
US7784160B2 (en) | 2007-03-16 | 2010-08-31 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US20100226599A1 (en) * | 2007-05-10 | 2010-09-09 | Ryo Katada | Fastener Tape and Packaging Bag with Fastener Tape |
US7857515B2 (en) | 2007-06-15 | 2010-12-28 | S.C. Johnson Home Storage, Inc. | Airtight closure mechanism for a reclosable pouch |
US7874731B2 (en) | 2007-06-15 | 2011-01-25 | S.C. Johnson Home Storage, Inc. | Valve for a recloseable container |
US7886412B2 (en) | 2007-03-16 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Pouch and airtight resealable closure mechanism therefor |
US7887238B2 (en) | 2007-06-15 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Flow channels for a pouch |
US7946766B2 (en) | 2007-06-15 | 2011-05-24 | S.C. Johnson & Son, Inc. | Offset closure mechanism for a reclosable pouch |
US7967509B2 (en) | 2007-06-15 | 2011-06-28 | S.C. Johnson & Son, Inc. | Pouch with a valve |
US20110162329A1 (en) * | 2010-01-05 | 2011-07-07 | Flair Flexible Packaging Corporation | Bag having both permanent and resealable seals |
US20110274801A1 (en) * | 2010-05-10 | 2011-11-10 | Robin Haber | Elastomeric multi-function squeezer/strainer device |
US20120275730A1 (en) * | 2009-12-11 | 2012-11-01 | Idemitsu Unitech Co., Ltd. | Zipper tape and packaging bag with zipper tape |
US10450106B2 (en) * | 2015-03-31 | 2019-10-22 | Idemitsu Unitech Co., Ltd. | Bag with zipper tape and method for producing same |
US11572219B2 (en) | 2019-02-08 | 2023-02-07 | Elplast Europe Sp. Z O.O. | Zipper closure and package using the same |
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JP4801328B2 (en) * | 2004-06-04 | 2011-10-26 | 出光ユニテック株式会社 | CHUCK TAPE, PACKAGING BAG WITH CHUCK TAPE, AND METHOD FOR MANUFACTURING PACKAGING BAG WITH CHUCK TAPE |
US20090257686A1 (en) * | 2008-04-14 | 2009-10-15 | Illinois Tool Works Inc. | Flow-wrapper package with reclosure |
US20090297817A1 (en) * | 2008-05-30 | 2009-12-03 | Illinois Tool Works Inc. | Sealant on polyethylene zipper for polypropylene film substrates |
CN114249015B (en) * | 2020-09-25 | 2022-11-08 | 科劲市场管理有限公司 | Bag container with sealing mechanism |
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---|---|---|---|---|
US20050042664A1 (en) * | 2003-08-22 | 2005-02-24 | Medimmune, Inc. | Humanization of antibodies |
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US8827556B2 (en) | 2007-03-16 | 2014-09-09 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US8176604B2 (en) | 2007-03-16 | 2012-05-15 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
US20100226599A1 (en) * | 2007-05-10 | 2010-09-09 | Ryo Katada | Fastener Tape and Packaging Bag with Fastener Tape |
US7946766B2 (en) | 2007-06-15 | 2011-05-24 | S.C. Johnson & Son, Inc. | Offset closure mechanism for a reclosable pouch |
US7967509B2 (en) | 2007-06-15 | 2011-06-28 | S.C. Johnson & Son, Inc. | Pouch with a valve |
US8231273B2 (en) | 2007-06-15 | 2012-07-31 | S.C. Johnson & Son, Inc. | Flow channel profile and a complementary groove for a pouch |
US7887238B2 (en) | 2007-06-15 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Flow channels for a pouch |
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US20120275730A1 (en) * | 2009-12-11 | 2012-11-01 | Idemitsu Unitech Co., Ltd. | Zipper tape and packaging bag with zipper tape |
US20110162329A1 (en) * | 2010-01-05 | 2011-07-07 | Flair Flexible Packaging Corporation | Bag having both permanent and resealable seals |
US20110274801A1 (en) * | 2010-05-10 | 2011-11-10 | Robin Haber | Elastomeric multi-function squeezer/strainer device |
WO2011143047A1 (en) * | 2010-05-10 | 2011-11-17 | Robin Haber | Elastomeric multi-function squeezer/strainer device |
US10450106B2 (en) * | 2015-03-31 | 2019-10-22 | Idemitsu Unitech Co., Ltd. | Bag with zipper tape and method for producing same |
US11572219B2 (en) | 2019-02-08 | 2023-02-07 | Elplast Europe Sp. Z O.O. | Zipper closure and package using the same |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: DAIWA GRAVURE CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHIBATA, YUKIHIKO;REEL/FRAME:014685/0719 Effective date: 20031031 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |