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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0677383 (2017-08-15) |
등록번호 | US-10253439 (2019-04-09) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 0 인용 특허 : 392 |
This disclosure relates to an article that includes a nonwoven substrate and a film supported by the nonwoven substrate. The film can include a first polymer and a polymer that is immiscible with the first polymer. The first polymer can include a polyolefin and the second polymer can include a polyc
This disclosure relates to an article that includes a nonwoven substrate and a film supported by the nonwoven substrate. The film can include a first polymer and a polymer that is immiscible with the first polymer. The first polymer can include a polyolefin and the second polymer can include a polycycloolefin, a polymethylpentene, or a copolymer thereof.
1. A method of making an article, comprising: forming a laminate comprising a nonwoven substrate and a microporous breathable film supported by the nonwoven substrate, wherein the microporous breathable film comprises a first polymer and a second polymer, the second polymer being immiscible with the
1. A method of making an article, comprising: forming a laminate comprising a nonwoven substrate and a microporous breathable film supported by the nonwoven substrate, wherein the microporous breathable film comprises a first polymer and a second polymer, the second polymer being immiscible with the first polymer, the first polymer comprises a polyolefin, and the second polymer comprises a polycycloolefin, a polymethylpentene, or a copolymer thereof; andstretching the laminate to form the article;wherein the microporous breathable film is devoid of a pore-forming filler, and wherein the laminate has a MVTR from 35 g/m2/day to 140 g/m2/day according to ASTM E96-A and measured at 23° C. and 50 RH %. 2. The method of claim 1, wherein forming the laminate comprises extruding the film onto the nonwoven substrate. 3. The method of claim 1, wherein the laminate is stretched and at an elevated temperature. 4. The method of claim 3, wherein the elevated temperature is at least about 30° C. 5. The method of claim 1, wherein the laminate is stretched in the machine direction. 6. The method of claim 1, wherein the laminate is stretched in the cross-machine direction. 7. The method of claim 1, wherein the laminate is stretched by a method selected from the group consisting of ring rolling, tentering, embossing, creping and button breaking. 8. The method of claim 1, further comprising embossing the laminate prior to or after stretching the laminate. 9. The method of claim 1, further comprising bonding randomly disposed polymeric fibers to produce the nonwoven substrate prior to forming the laminate. 10. The method of claim 1, wherein the first polymer comprises at most about 99% of a total weight of the microporous breathable film and an amount of the second polymer comprises at least about 1% of the total weight of the microporous breathable film. 11. The method of claim 10, wherein the second polymer has a polymer backbone similar to that of the first polymer such that at least about 5% by weight of the amount of the second polymer is blended with the first polymer. 12. The method of claim 10, wherein at least about 30% by weight of the amount of the second polymer is blended with the first polymer. 13. The article of claim 10, wherein 5-30% by weight of the amount of the second polymer is blended with the first polymer. 14. The method of claim 1, wherein the second polymer comprises a poly(cycloolefin-co-olefin). 15. The method of claim 1, wherein the second polymer comprises a poly(norbornene-co-ethylene) or a copolymer formed from ethylene and norbornene substituted with a substituent. 16. The method of claim 1, wherein the first polymer comprises a polyethylene or a polypropylene.
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