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US 10,850,491 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 that includes a nonwoven substrate, a first film supported by the nonwoven substrate, and a second film such that the first film is between the nonwoven substrate and the second film. The first film includes a first polymer and a pore-forming filler. The difference between a surface energy of the first film and a surface energy of the nonwoven substrate is at most about 10 mN/m. The second film includes a second polymer capable of absorbing and desorbing moisture and providing a barrier to aqueous fluids.
Claims21
A method of making an article, comprising:
- applying a first film and a second film onto a nonwoven substrate to form a laminate such that the first film is directly or indirectly between the nonwoven substrate and the second film, wherein the first film comprises a first polymer and a pore-forming filler, and the difference between a surface energy of the first film and a surface energy of the nonwoven substrate is at most about 10 mN/m, and the second film comprises a monolithic breathable film comprising a second polymer capable of absorbing and desorbing moisture and providing a barrier to aqueous fluids;
- wherein the laminate has an original length;
- and
- stretching the laminate to form pores in the first film;
- wherein the laminate has a maximum percent elongation determined by a difference between a second length and the original length of less than 70% according to ASTM D5034;
- wherein the second length is the length of the article at break.
3 more elements
Dependencies are inferred from the claim text.