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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
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| 출원번호 | US-0523028 (2012-06-14) |
| 등록번호 | US-9827696 (2017-11-28) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 0 인용 특허 : 389 |
This disclosure relates to an article (e.g., a vapor-permeable, substantially water-impermeable multilayer article) that includes a nonwoven substrate and a film supported by the nonwoven substrate. The film includes a polyolefin, a nanoclay, and a pore-forming filler.
1. An article, comprising: (i) a breathable film comprising a polyolefin, a nanoclay, and a pore-forming filler, wherein the breathable film comprises pores around the pore-forming filler; and(ii) a nonwoven substrate, wherein the breathable film is supported by the nonwoven substrate;wherein the na
1. An article, comprising: (i) a breathable film comprising a polyolefin, a nanoclay, and a pore-forming filler, wherein the breathable film comprises pores around the pore-forming filler; and(ii) a nonwoven substrate, wherein the breathable film is supported by the nonwoven substrate;wherein the nanoclay comprises particles having an average aspect ratio of from about 200 to about 500; andwherein the article has a moisture vapor transmission rate of at least about 35 g/m2/day to at most about 140 g/m2/day when measured at 23° C. and 50 RH % and an elongation of at least about 5% to about 100% as measured according to ASTM D5034. 2. The article of claim 1, wherein the nanoclay comprises montmorillonite clay. 3. The article of claim 1, wherein the nanoclay has an average thickness of from about 0.5 nm to about 2 nm. 4. The article of claim 2, wherein the breathable film comprises from about 0.1% by weight to about 20% by weight of the nanoclay. 5. The article of claim 1, wherein the polyolefin comprises a polyethylene, a polypropylene, or a copolymer thereof. 6. The article of claim 5, wherein the polyolefin comprises a polyethylene selected from the group consisting of low-density polyethylene, linear low-density polyethylene, and high-density polyethylene. 7. The article of claim 5, wherein the breathable film further comprises a functionalized polyolefin. 8. The article of claim 1, wherein the pore-forming filler comprises calcium carbonate. 9. The article of claim 8, wherein the breathable film comprises from about 30% by weight to about 70% by weight of the calcium carbonate. 10. The article of claim 1, wherein the breathable film further comprises an elastomer. 11. The article of claim 10, wherein the elastomer is a thermoplastic olefin elastomer. 12. The article of claim 11, wherein the elastomer is a propylene-ethylene copolymer. 13. The article of claim 1, wherein the nonwoven substrate comprises randomly disposed polymeric fibers, at least some of the fibers being bonded to one another. 14. The article of claim 1, wherein, when the article has a unit weight of 1.25 osy, the article has a tensile strength of at least about 40 pounds in the machine direction as measured according to ASTM D5034. 15. The article of claim 1, wherein, when the article has a unit weight of 1.25 osy, the article has a tensile strength of at least about 35 pounds in the cross-machine direction as measured according to ASTM D5034. 16. The article of claim 1, wherein the article has a hydrostatic head of at least about 55 cm. 17. The article of claim 1, wherein the article is embossed. 18. A construction material, comprising the article of claim 1. 19. The construction material of claim 18, wherein the construction material is a housewrap or a roofwrap. 20. The article of claim 1, wherein: the nanoclay comprises particles of montmorillonite clay having an average thickness of from about 0.5 nm to about 2 nm;the polyolefin comprises a polyethylene, polypropylene, or a copolymer thereof; andthe pore-forming filler comprises calcium carbonate. 21. The article of claim 20, wherein the breathable film is supported by a nonwoven substrate comprising randomly disposed polymeric fibers, at least some of the fibers being bonded to one another. 22. The article of claim 21, wherein: the article has a unit weight of 1.25 osy; the article has a tensile strength of at least about 35 pounds in at least one of the machine direction or the cross-machine direction as measured according to ASTM D5034; and the article has a hydrostatic head of at least about 55 cm. 23. The article of claim 22, further comprising a thermoplastic olefin elastomer. 24. The article of claim 1, wherein the breathable film comprises a first breathable film, and the article further comprises a second breathable film comprising nanoclay and pore-forming filler; and wherein the nonwoven substrate is disposed between the first breathable film and the second breathable film. 25. The article of claim 1, wherein the moisture vapor transmission rate comprises at least about 35 g/m2/day to at most about 110 g/m2/day when measured at 23° C. and 50 RH %.
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