Stretchable mechanical/adhesive closure for a disposable diaper

• US 6,419,667 B1
• Filed: 10/09/1998
• Issued: 07/16/2002
• Est. Priority Date: 01/16/1996
• Status: Expired due to Term

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Hilston, Michael D., Hartman, William G., Spilizewski, Karen L., Avalon, Gary A., Savage, David L.
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): KIDWELL, MICHELE M
• Application Number:
  US09/101,564
• Time in Patent Office: 1,376 Days
• Field of Search: 604/389, 604/391, 604/398, 604/386, 604/387, 244/42, 243/06, 244/44--48, 244/52, 245/50
• US Class Current: 604/391
• CPC Class Codes: A61F 13/581 Tab fastener elements combining adhesive and mechanical fastening fabric strip fastener elements A61F13/62
• CPC Class Codes: Y10T 24/27 including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]

Abstract

A fastening system for releasably securing a diaper provides both mechanical and adhesive or cohesive securement. Tab members comprise a facestock layer, a contact layer of adhesive or cohesive overlying at least a portion of the facestock layer, and mechanical fastening elements projecting from at least a portion of the contact layer. The facestock layer includes extensible and substantially nonextensible polymeric portions. A landing member includes complementary mechanical fastening elements and a contact surface or cohesive for engagement with the tab adhesive or cohesive. A method is also disclosed for making the fastening system.

Claims

1. A fastening system for releasably securing a diaper closed about a user includes tab and landing members respectively mounted to opposite ends of said diaper, each of said tab members including a facestock layer comprising a coextrusion of extensible and substantially nonextensible polymeric portions, first contact securement means comprising a first contact layer of pressure-sensitive adhesive or cohesive overlying said facestock layer, and first mechanical fastening elements comprising discrete members extending within and projecting from said first contact layer overlying said nonextensible portion of said facestock layer only, said landing member including second mechanical fastening elements for mechanical interengagement with said first mechanical fastening elements and second contact securement means comprising a second contact layer of pressure-sensitive adhesive or cohesive for adhesive or cohesive contact securement with said first contact layer, whereby said tab and landing member provide mechanical interengagement and simultaneous adhesive or cohesive securement when said fastening system secures said diaper about a user.

2. A fastening system as in claim 1, wherein said first and second mechanical fastening elements respectively comprise hooks and loops.

3. A fastening system as in claim 2, wherein said loops also provide said second contact securement means.

4. A fastening system as in claim 1, wherein said first contact layer is a layer of pressure-sensitive adhesive.

5. A fastening system as in claim 1, wherein said first contact layer is a layer of cohesive.

6. A fastening system as in claim 5, wherein said second contact layer is a layer of cohesive.

7. A fastening system as in claim 1, wherein said landing member comprises a fibrous fabric having fibers providing said second mechanical fastening elements.

8. A fastening system as in claim 7, wherein said fibers also provide said second contact securement means.

9. A fastening system as in claim 1, wherein said discrete members of said first mechanical fastening elements are formed separate of said first contact layer.

10. A fastening system as in claim 9, wherein said discrete members of said first mechanical fastening elements are partially embedded in said first contact layer.

11. A method of making a fastening system for releasably securing a diaper about a user, said fastening system including tab and landing members respectively mounted to opposite ends of said diaper, comprising:

providing a laminate for forming said tab member by coextruding a facestock layer including extensible and substantially nonextensible polymeric portions, applying a first contact layer of pressure-sensitive adhesive or cohesive over said facestock layer, and providing first mechanical fastening elements comprising discrete members extending within and projecting from said first contact layer overlying said nonextensible portion of said facestock layer only, cutting said laminate to form said tab member with a length and a width such that said polymeric portions extend substantially across the width of said tab member at spaced locations along the length thereof,

providing said landing member including second mechanical fastening elements for mechanical interengagement with said first mechanical fastening elements and second contact securement means comprising a second contact layer of pressure-sensitive adhesive or cohesive for adhesive or cohesive contact securement with said first contact layer, and

mounting said tab and landing members to said opposite ends of said diaper, whereby said tab and landing member provide mechanical interengagement and simultaneous adhesive or cohesive securement when said fastening system secures said diaper about a user.

12. A method as in claim 11, wherein said landing member comprises a fibrous fabric having fibers providing said second mechanical fastening elements.

13. A method as in claim 12, wherein said fibers also provide said second contact layer and said first contact layer is a layer of pressure-sensitive adhesive.

14. A method of as in claim 11, wherein said first contact layer has a thickness and an exposed surface remote of said facestock layer, and providing said first mechanical fastening elements includes providing said discrete members separate of said first mechanical fastening elements and attaching said discrete members to the facestock layer with said discrete members of said first fastening elements extending through said exposed surface of said first contact layer.

15. A method as in claim 11, wherein said first contact layer has a thickness and an exposed surface remote of said face stock layer, and providing said first mechanical fastening elements includes integrally providing said first mechanical fastening elements and said face stock layer with said discrete members of said first mechanical fastening elements extending through said exposed surface of said first contact layer.