Compressively resistant and resilient fibrous nonwoven web

• US 5,522,810 A
• Filed: 06/05/1995
• Issued: 06/04/1996
• Est. Priority Date: 06/05/1995
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Corporation
• Inventors: Allen, Roe C. Jr., Burnes, Andrew S.
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): Zuttarelli, P.
• Application Number:
  US08/463,593
• Time in Patent Office: 365 Days
• Field of Search: 604/358, 604/365-367, 604/370, 428/224, 428/373, 428/374
• US Class Current: 604/366
• CPC Class Codes: A61F 13/513 characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61F 2013/153 in dry conditions
• CPC Class Codes: A61F 2013/15373 Calliper, i.e. thickness
• CPC Class Codes: A61F 2013/15422 Density
• CPC Class Codes: A61F 2013/15552 Air permeability
• CPC Class Codes: A61F 2013/53024 being bicomponent fibres
• CPC Class Codes: Y10T 428/2929 Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
• CPC Class Codes: Y10T 428/2931 Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]

Abstract

Disclosed herein is a compressively resistant and resilient fibrous nonwoven web which is suitable for a wide variety of uses including, but not limited to, a portion of a personal care absorbent product which is located on the side of the absorbent core of the product which faces the wearer. The nonwoven web can include bicomponent fiber and has a thickness of 2.5 mm or greater at a pressure of 68.9 pascal, a specific volume of 14 cc/g or greater at a pressure of 6,895 pascal, and a Frazier air permeability of 100 cubic meters per square meter per minute or greater.

Claims

1. A compressively resistant and resilient fibrous nonwoven web comprising:

a plurality of randomly-deposited fibers bonded to one another to form a nonwoven web, said nonwoven web having a thickness of 2.5 millimeters or greater at a pressure of 68.9 pascals, a specific volume of 14 cubic centimeters per gram or greater at a pressure of 6,895 pascals, a compression resistance of 25 percent or greater and a compression resiliency of 80 percent or greater.

2. The nonwoven web of claim 1 which has a Frazier air permeability of 100 cubic meters per square meter per minute or greater.

3. The nonwoven web of claim 1 wherein at least a portion of said plurality of fibers are bicomponent fibers.

4. The nonwoven web of claim 3 wherein said plurality of fibers are thermally bonded.

5. A personal care absorbent product comprising:

a liquid-permeable top sheet and a bottom sheet with an absorbent core disposed therebetween, said top sheet comprising the nonwoven web of claim 1.

6. The personal care absorbent product of claim 5 wherein said product is a diaper.

7. The personal care absorbent product of claim 5 wherein said product is a training pant.

8. The personal care absorbent product of claim 5 wherein said product is an incontinence device.

9. The personal care absorbent product of claim 5 wherein said product is a sanitary napkin.

10. The personal care absorbent product of claim 5 wherein said product is a bandage.

20. A personal care absorbent product comprising:

a liquid-permeable top sheet and a bottom sheet with an absorbent core disposed therebetween and a separation layer disposed between said top sheet and said absorbent core, said separation layer comprising the nonwoven web of claim 1.

21. The personal care absorbent product of claim 20 wherein said product is a diaper.

22. The personal care absorbent product of claim 20 wherein said product is a training pant.

23. The personal care absorbent product of claim 20 wherein said product is an incontinence device.

24. The personal care absorbent product of claim 20 wherein said product is a sanitary napkin.

25. The personal care absorbent product of claim 20 wherein said product is a bandage.

11. A compressively resistant and resilient fibrous nonwoven web comprising:

a plurality of fibers thermally bonded to form a nonwoven web wherein at least a portion of said fibers comprise bicomponent fibers, said nonwoven web having a thickness of 2.5 millimeters or greater at a pressure of 68.9 pascals, a specific volume of 14 cubic centimeters per gram or greater at a pressure of 6,895 pascals, a compression resistance of 25 percent or greater, a compression resiliency of 80 percent or greater and a Frazier air permeability of 100 cubic meters or greater.

12. The nonwoven web of claim 11 wherein at least a portion of said plurality of fibers are bicomponent fibers.

13. The nonwoven web of claim 12 wherein said plurality of fibers are thermally bonded.

14. A personal care absorbent product comprising:

a liquid-permeable top sheet and a bottom sheet with an absorbent core disposed therebetween, said top sheet comprising the nonwoven web of claim 11.

15. The personal care absorbent product of claim 14 wherein said product is a diaper.

16. The personal care absorbent product of claim 14 wherein said product is a training pant.

17. The personal care absorbent product of claim 14 wherein said product is an incontinence device.

18. The personal care absorbent product of claim 14 wherein said product is a sanitary napkin.

19. The personal care absorbent product of claim 14 wherein said product is a bandage.

26. A personal care absorbent product comprising:

a liquid-permeable top sheet and a bottom sheet with an absorbent core disposed therebetween and a separation layer disposed between said top sheet and said absorbent core, said separation layer comprising the nonwoven web of claim 11.

27. The personal care absorbent product of claim 26 wherein said product is a diaper.

28. The personal care absorbent product of claim 26 wherein said product is a training pant.

29. The personal care absorbent product of claim 26 wherein said product is an incontinence device.

30. The personal care absorbent product of claim 26 wherein said product is a sanitary napkin.

31. The personal care absorbent product of claim 26 wherein said product is a bandage.