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Web materials having elastic-like and expansive zones

Info

Publication number
CA2239425C
CA2239425C CA 2239425 CA2239425A CA2239425C CA 2239425 C CA2239425 C CA 2239425C CA 2239425 CA2239425 CA 2239425 CA 2239425 A CA2239425 A CA 2239425A CA 2239425 C CA2239425 C CA 2239425C
Authority
CA
Grant status
Grant
Patent type
Prior art keywords
web
material
zone
region
elastic
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
CA 2239425
Other languages
French (fr)
Other versions
CA2239425A1 (en )
Inventor
Richard Worthington Lodge
John Joseph Curro
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
Grant date

Links

Classifications

    • 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
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • 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
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/4902Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/18Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers

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.

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.
CA 2239425 1995-12-04 1996-11-20 Web materials having elastic-like and expansive zones Expired - Lifetime CA2239425C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US56647195 true 1995-12-04 1995-12-04
US08/566,471 1995-12-04
PCT/US1996/018649 WO1997020531A1 (en) 1995-12-04 1996-11-20 Web materials having elastic-like and expansive zones

Publications (2)

Publication Number Publication Date
CA2239425A1 true CA2239425A1 (en) 1997-06-12
CA2239425C true CA2239425C (en) 2001-07-24

Family

ID=24263035

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2239425 Expired - Lifetime CA2239425C (en) 1995-12-04 1996-11-20 Web materials having elastic-like and expansive zones

Country Status (9)

Country Link
US (1) US5993432A (en)
JP (1) JP3067808B2 (en)
KR (1) KR100459955B1 (en)
CN (1) CN1146680C (en)
CA (1) CA2239425C (en)
DE (2) DE69623327T2 (en)
EP (1) EP0871421B1 (en)
ES (1) ES2180814T3 (en)
WO (1) WO1997020531A1 (en)

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Also Published As

Publication number Publication date Type
EP0871421A1 (en) 1998-10-21 application
DE69623327T2 (en) 2002-12-19 grant
CA2239425A1 (en) 1997-06-12 application
CN1146680C (en) 2004-04-21 grant
JPH11500794A (en) 1999-01-19 application
CN1207663A (en) 1999-02-10 application
WO1997020531A1 (en) 1997-06-12 application
ES2180814T3 (en) 2003-02-16 grant
DE69623327D1 (en) 2002-10-02 grant
KR100459955B1 (en) 2005-01-15 grant
EP0871421B1 (en) 2002-08-28 grant
US5993432A (en) 1999-11-30 grant
JP3067808B2 (en) 2000-07-24 grant

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Effective date: 20161121