Three-dimensional, seamless waterproof breathable flexible composite material
US5650225A · kind A · utility
33Cited by
13References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1996 |
| Grant date | Jul 22, 1997 |
| Priority date | — |
| Expiry date | Aug 8, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2246
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Waterproof, breathable, flexible, seamless shaped articles, such as gloves or socks, are described which are made of a flexible layered composite comprising: PA1 (a) a microporous thermoplastic polyester polyurethane or polyether polyurethane that is water vapor permeable, and PA1 (b) a nonporous copolymer that is waterproof but water vapor permeable which provides improved waterproofness to the microporous polymer layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.