Hydraulically entangled nonwoven elastomeric web and method of forming the same

• US 4,939,016 A
• Filed: 03/18/1988
• Issued: 07/03/1990
• Est. Priority Date: 03/18/1988
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Corporation
• Inventors: Smith, Roland C., Trimble, Lloyd E., Kimmitt, Deborah A., Radwanski, Fred R., Everhart, Cherie H.
• Primary Examiner(s): Bell, James J.
• Application Number:
  US07/170,209
• Time in Patent Office: 837 Days
• Field of Search: 428/181, 428/182, 428/152, 428/153, 428/283, 428/284, 428/288, 428/297, 428/298, 428/299, 428/300, 428/326, 428/903, 428/913, 428/327, 28/104
• US Class Current: 428/152
• CPC Class Codes: D04H 1/492 by fluid jet D04H1/49 takes precedence
• CPC Class Codes: D04H 1/56 in association with fibre formation, e.g. immediately following extrusion of staple fibres
• CPC Class Codes: Y10S 428/903 Microfiber, less than 100 micron diameter
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/24446 Wrinkled, creased, crinkled or creped
• CPC Class Codes: Y10T 428/24694 Parallel corrugations
• CPC Class Codes: Y10T 428/253 Cellulosic [e.g., wood, paper, cork, rayon, etc.]
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 442/602 Nonwoven fabric comprises an elastic strand or fiber material

Abstract

A composite nonwoven elastomeric web material, and method of forming such material, as well as a nonwoven elastomeric web material and method of forming such material, are disclosed. The composite web material is provided by hydraulically entangling a laminate of at least (1) a layer of meltblown fibers; and (2) at least one further layer, preferably of at least one of pulp fibers, staple fibers, meltblown fibers, and continuous filaments, with or without particulate material, with at least one of the layer of meltblown fibers and the further layer being elastic so as to form an elastic web material after hydraulic entanglement. The nonwoven elastomeric web material is provided by hydraulically entangling a layer of meltblown elastomeric fibers. The material formed can be cloth-like with smooth surfaces, and with isotropic elasticity and strength. Different texture properties, including a corrugated stretchable fabric, can be provided by pre-stretching and then hydraulically entangling while stretched.

Claims

1. A composite nonwoven elastomeric web comprising:

a first fibrous layer including meltblown fibers; and

a second fibrous layer;

wherein the fibers of at least one of the layers are elastomeric and the layers are joined by hydraulic entanglement of the fibers of at least one of the layers with the fibers of the other layer and wherein the composite nonwoven elastomeric web has substantially smooth outer surfaces.

2. The composite nonwoven elastomeric web according to claim 1, wherein the second fibrous layer includes fibers selected from the group including pulp fibers, staple fibers and meltblown fibers.

3. The composite nonwoven elastomeric web according to claim 2, wherein the first fibrous layer is a layer of elastomeric meltblown fibers.

4. The composite nonwoven elastomeric web according to claim 3, consisting essentially of said layer of elastomeric meltblown fibers and said second fibrous layer.

5. The composite nonwoven elastomeric web according to claim 3, wherein said second fibrous layer is a web.

6. The composite nonwoven elastomeric web according to claim 2, wherein said pulp fibers are wood pulp fibers.

7. The composite nonwoven elastomeric web according to claim 1, wherein said second fibrous layer is a sheet of paper.

8. The composite nonwoven elastomeric web according to claim 1, wherein said composite includes a third fibrous layer which, in conjunction with said second fibrous layer, sandwich the layer including elastomeric meltblown fibers.

9. The composite nonwoven elastomeric web according to claim 8, wherein at least one of said second and third fibrous layers is a sheet of paper.

10. The composite nonwoven elastomeric web according to claim 8, wherein at least one of said second and third fibrous layers is a layer of pulp fibers.

11. The composite nonwoven elastomeric web according to claim 8, wherein at least one of said second and third fibrous layers is a layer of staple fibers.

12. The composite nonwoven elastomeric web according to claim 1, wherein said staple fibers are polyester staple fibers.

13. The composite nonwoven elastomeric web according to claim 12, wherein the polyester staple fibers are carded.

14. The composite nonwoven elastomeric web according to claim 1, wherein said second fibrous layer includes carded polyester staple fibers.

15. The composite nonwoven elastomeric web according to claim 3, wherein said first fibrous layer includes a web of elastomeric meltblown fibers and a web of polyolefin meltblown fibers so that the first fibrous web is adapted to have barrier properties.

16. The composite nonwoven elastomeric web according to claim 1, having isotropic elastic properties.

17. The composite nonwoven elastomeric web according to claim 3, wherein the first fibrous layer was in stretched configuration during hydraulic entangling so that a corrugated composite web is formed.

18. The composite nonwoven elastomeric web according to claim 1, wherein said second fibrous layer is an admixture of meltblown fibers and at least one material selected from the group including staple fibers, pulp fibers, particulate material and continuous filaments.

19. The composite nonwoven elastomeric web according to claim 1, wherein said admixture further includes a particulate material.

20. The composite nonwoven elastomeric web according to claim 1, wherein said second fibrous layer includes cellulose fibers.

21. The composite nonwoven elastomeric web according to claim 1, wherein said second fibrous layer includes synthetic pulp fibers, the synthetic pulp fibers being not greater than 0.25 inches long and 1.3 denier.

22. The composite nonwoven elastomeric web according to claim 21, wherein the synthetic pulp fibers are polyester pulp fibers.

23. The composite nonwoven elastomeric web according to claim 3, wherein the elastomeric meltblown fibers are selected from the group consisting of polyurethane fibers and polyetherester fibers.

24. The coupling nonwoven elastomeric web according to claim 23, wherein the second fibrous layer includes 15-65% polyester pulp fibers, of the basis weight of the composite web.

25. The composite nonwoven elastomeric web according to claim 24, wherein the composite web has a basis weight of 100-200 g/m².

26. The composite nonwoven elastomeric web according to claim 1, wherein the web has a terry-cloth surface.

27. A nonwoven elastomeric web formed by hydraulically entangling a layer of meltblown elastomeric fibers.

28. The nonwoven elastomeric web according to claim 27, wherein said meltblown elastomeric fibers are formed of a single elastomeric material.

29. A process of forming a composite nonwoven elastic web comprising:

providing a first fibrous layer including meltblown fibers,

directing a plurality of high-pressure liquid streams toward a surface of said first fibrous layer to entangle the fibers of said layer,

overlaying said entangled first fibrous layer with a second fibrous layer, wherein the fibers of at least one of the layers are elastomeric; and

directing a plurality of high-pressure liquid streams toward a surface of said laminate to entangle the fibers of at least one of the layers with the fibers of the other layer, and

wherein the composite nonwoven elastomeric web has substantially smooth outer surfaces.

30. The process according to claim 29 wherein said plurality of high-pressure liquid streams are directed to said surface of said laminate a plurality of times.

31. The process according to claim 29, wherein said of high-pressure liquid streams are directed toward each surface of said laminate.

32. The process according to claim 31, wherein said laminate includes a third fibrous layer which, in conjunction with said second fibrous layer, sandwich the layer including elastomeric meltblown fibers.

33. The product formed by the process of claim 32.

34. The product formed by the process of claim 29.

35. A process of forming a nonwoven elastomeric web comprising the steps of:

providing a layer of meltblown elastomeric fibers; and

directing a plurality of high-pressure liquid streams toward a surface of said layer, to entangle said fibers.

36. The process according to claim 35, wherein said meltblown elastomeric fibers are formed of a single material.

37. The formed by the process of claim 35.

38. A process of forming a composite nonwoven elastic web comprising the steps of:

providing a first fibrous layer including elastomeric meltblown fibers,

directing a plurality of high-pressure liquid streams toward a surface of said first fibrous layer to entangle the fibers of said layer,

overlaying said entangled first fibrous layer with a second non-elastomeric filamentary layer;

directing a plurality of high-pressure liquid streams toward a surface of said laminate to entangle the fibers of at least one of the layers with the filaments of the other layer; and

stretching and relaxing the hydraulically entangled composite nonwoven web, and

wherein the composite nonwoven elastomeric web has substantially smooth outer surfaces.

39. A composite nonwoven elastomeric web comprising a layer of elastomeric meltblown fibers hydraulically entangled with at least one mechanically worked non-elastomeric filamentary layer.

40. A composite nonwoven elastomeric web comprising a layer of meltblown fibers hydraulically entangled with at least one elastomeric filamentary layer.