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Publication numberCA2239425 C
Publication typeGrant
Application numberCA 2239425
PCT numberPCT/US1996/018649
Publication date24 Jul 2001
Filing date20 Nov 1996
Priority date4 Dec 1995
Also published asCA2239425A1, CN1146680C, CN1207663A, DE69623327D1, DE69623327T2, EP0871421A1, EP0871421B1, US5993432, WO1997020531A1
Publication numberCA 2239425, CA 2239425 C, CA 2239425C, CA-C-2239425, CA2239425 C, CA2239425C, PCT/1996/18649, PCT/US/1996/018649, PCT/US/1996/18649, PCT/US/96/018649, PCT/US/96/18649, PCT/US1996/018649, PCT/US1996/18649, PCT/US1996018649, PCT/US199618649, PCT/US96/018649, PCT/US96/18649, PCT/US96018649, PCT/US9618649
InventorsRichard Worthington Lodge, John Joseph Curro
ApplicantThe Procter & Gamble Company, Richard Worthington Lodge, John Joseph Curro
Export CitationBiBTeX, EndNote, RefMan
External Links: CIPO, Espacenet
Web materials having elastic-like and expansive zones
CA 2239425 C
Abstract
A web material exhibiting both an elastic-like and an expansive behavior in response to an applied elongation. The web material includes an elastic-like zone and an expansive zone disposed adjacent to the elastic-like zone. The expansive zone allows the elastic-like zone to extend without generating excessive tensional forces. The elastic-like zone includes a strainable network having a first region and a second region. The second region has a surface-pathlength greater than the surface-pathlength of the first region.
The expansive zone has a surface-pathlength greater than the first region and different than that of the second region.
Description  available in
Claims(11)
1. A web material exhibiting both an elastic-like and an expansive behavior in response to an applied elongation along at least one axis thereof, said web material comprising:
an elastic-like zone and an expansive zone disposed adjacent to said elastic-like zone, said elastic-like zone and said expansive zone being formed of substantially the same material composition, said elastic-like zone comprising a strainable network comprising a first region having a surface-pathlength and a second region having a surface-pathlength, the surface-pathlength of said second region being greater than the surface-pathlength of said first region as measured parallel to said axis while said web is in an untensioned condition, said expansive zone having a surface-pathlength greater than the surface-pathlength of said first region and a surface-pathlength different than the surface-pathlength of said second region as measured parallel to said axis while said web is in an untensioned condition.
2. The web material of Claim 1, wherein said first region undergoes a substantially molecular-level deformation and said second region initially undergoes a substantially geometric deformation in response to the applied elongation.
3. The web material of Claim 2, wherein said expansive zone initially undergoes a substantially geometric deformation in response to the applied elongation.
4. The web material of any one of claims 1 to 3, wherein said first region and said second region are visually distinct from one another.
5. The web material of any one of claims 1 to 4, wherein said second region comprises a plurality of rib-like elements.
6. The web material of any one of claims 1 to 5, wherein said expansive zone comprises a plurality of incrementally stretched regions.
7. The web material of any one of claims 1 to 6, wherein said expansive zone is contiguous with said elastic-like zone.
8. The web material of any one of claims 1 to 7, wherein said web material comprises a portion of a disposable absorbent article.
9. The web material any one of claims 1 to 8, wherein said web material comprises a portion of a backsheet on a disposable absorbent article.
10. The web material any one of claims 1 to 9, wherein said web material comprises a portion of a topsheet on a disposable absorbent article.
11. The web material any one of claims 1 to 10, wherein said web material forms a waist feature, an elasticized leg cuff, or an ear flap on a disposable diaper.
Classifications
International ClassificationD04H1/54, A61F13/496, A61F5/44, B29C55/18, A61F13/494, A61F13/15
Cooperative ClassificationB29C55/18, A61F13/4902, A61F13/49009
European ClassificationA61F13/49D2H, A61F13/49D2, B29C55/18, D04H1/54B
Legal Events
DateCodeEventDescription
3 Jun 1998EEERExamination request
23 Jan 2017MKEXExpiry
Effective date: 20161121