Claims
- 1. A breathable composite having hydrostatic head according to IST 80.4-92 of at least about 4 inches comprising a laminate of at least one fibrous, nonwoven web layer and at least one thermoplastic, breathable film layer, wherein breathability is provided by a plurality of point-like deformations of the film layer.
- 2. The composite of claim 1 having a MVTR of at least about 500 g/m2/day.
- 3. The composite of claim 2 wherein the fibrous nonwoven web layer comprises filaments comprising at least one polyolefin resin.
- 4. The composite of claim 2 wherein the thermoplastic, breathable film layer comprises at least one polyolefin resin.
- 5. The composite of claim 2 wherein the thermoplastic, breathable film layer comprises at least one polyolefin resin and the nonwoven web layer comprises filaments comprising at least one polyolefin resin.
- 6. The composite of claim 5 having a cloth-like texture at at least one surface thereof.
- 7. The composite of claim 5 having a hydrostatic head of at least about 7 inches.
- 8. The composite of claim 7 wherein the polyolefin resin of the thermoplastic, breathable film layer comprises at least one polyethylene resin.
- 9. The composite of claim 8 wherein the polyolefin resin of the filaments comprises at least one polyethylene resin.
- 10. The composite of claim 8 wherein the polyolefin resin of the filaments comprises at least one polypropylene resin.
- 11. The composite of claim 7 wherein the polyolefin resin of the thermoplastic, breathable film layer comprises at least one polypropylene resin.
- 12. The composite of claim 11 wherein the polyolefin resin of the filaments comprises at least one polyethylene resin.
- 13. The composite of claim 11 wherein the polyolefin resin of the filaments comprises at least one polypropylene resin.
- 14. A breathable composite comprising a laminate comprising at least one breathable film layer and at least one nonwoven web layer, wherein the breathable film layer comprises a polyolefin resin and a finely divided particulate material capable of promoting breathability, the nonwoven web layer comprises filaments of at least one polyolefin resin, and breathability is provided by a plurality of embossed, point-like deformations of the film layer, such points occupying about 8 to about 40% of the area of a surface of the composite and being present on such surface at a density of about 100 to about 500 points per square inch.
- 15. The composite of claim 14 wherein the polyolefin resin of the breathable film layer comprises at least one polyethylene resin.
- 16. The composite of claim 15 wherein the nonwoven web layer comprises a web of substantially continuous filaments.
- 17. The composite of claim 16 wherein the filaments comprise at least one polypropylene resin.
- 18. The composite of claim 17 having a cloth-like texture at at least one surface thereof.
- 19. The composite of claim 16 wherein the filaments comprise at least one polyethylene resin.
- 20. The composite of claim 19 having a cloth-like texture at at least one surface thereof.
- 21. The composite of claim 15 wherein the nonwoven web layer comprises a web of staple fibers.
- 22. The composite of claim 21 wherein the staple fibers comprise at least one polypropylene resin.
- 23. The composite of claim 22 having a cloth-like texture at at least one surface thereof.
- 24. The composite of claim 21 wherein the staple fibers comprise at least one polyethylene resin.
- 25. The composite of claim 24 having a cloth-like texture at at least one surface thereof.
- 26. The composite of claim 14 wherein the polyolefin resin of the breathable film layer comprises at least one polypropylene resin.
- 27. The composite of claim 14 wherein the nonwoven web layer comprises a web of substantially continuous filaments comprising at least one polypropylene resin.
- 28. The composite of claim 14 wherein the nonwoven web layer comprises staple fibers comprising at least one polypropylene resin.
- 29. The composite of claim 14 wherein the nonwoven web layer comprises a web of substantially continuous filaments comprising at least one polyethylene resin.
- 30. The composite of claim 14 wherein the nonwoven web layer comprises staple fibers comprising at least one polyethylene resin.
- 31. A process for making a breathable composite comprising applying to at least one surface of a fibrous nonwoven web a coating of a molten, film-forming thermoplastic resin composition capable of developing breathability, cooling the molten resin to form a coated web and applying heat and pressure to the coated web at a plurality of points on a surface of the coated web, with the heat, pressure and density of the points being effective to impart breathability while maintaining liquid barrier properties.
- 32. The process of claim 31 wherein heat and pressure are applied to the coated web by point embossing the coated web.
- 33. The process of claim 32 wherein the film forming resin composition is applied to the web by extrusion coating.
- 34. The process of claim 33 wherein the web comprises substantially continuous filaments comprising a thermoplastic resin.
- 35. The process of claim 33 wherein the web comprises staple fibers comprising a thermoplastic resin.
- 36. A process for making a breathable composite comprising contacting a nonwoven fibrous web comprising filaments of a thermoplastic resin with a film comprising a thermoplastic resin composition capable of developing breathability and point embossing the film in contact with the web under conditions of temperature, pressure and density of embossing points effective to adhere the film to the web and develop breathability in the film.
- 37. The process of claim 36 wherein the filaments of the web comprise at least one polypropylene resin.
- 38. The process of claim 36 wherein the filaments of the web comprise at least one polyethylene resin.
- 39. The process of claim 36 wherein the thermoplastic resin of the film comprises at least one polypropylene resin.
- 40. The process of claim 36 wherein the thermoplastic resin of the film comprises at least one polyethylene resin.
Parent Case Info
[0001] This application claims the benefit of U.S. Provisional Application No. 60/082,514, filed Apr. 21, 1998.
Provisional Applications (1)
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Number |
Date |
Country |
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60082514 |
Apr 1998 |
US |