Vapor-permeable, substantially water-impermeable multilayer article
US11383504B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 22, 2020 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Oct 22, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/678
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.