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US 10,800,073 B2Granted
Vapor-permeable, substantially water-impermeable multilayer article
AssigneeFiberweb, Inc.
InventorMehdi Afshari
Life of this patent
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Abstract
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.
Claims18
A method of making an article, comprising:
- forming a laminate comprising (i) a nonwoven substrate comprising a plurality of intermittent bonds defining a bonded area from about 6% to about 40%, and (ii) a film supported by the nonwoven substrate, the film comprising a polyolefin, a nanoclay, and a pore-forming filler;
- and
- stretching the laminate to form pores in the film and to provide the article;
- wherein 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 the article has an elongation of at least about 5% to about 100% as measured according to ASTM D5034.
1 more element
Dependencies are inferred from the claim text.