Water vapor breathable, liquid water resistant material
US7148160B2 · kind B2 · utility
54Cited by
38References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 2004 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Jul 29, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/689
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a composite sheet material that is water vapor permeable and substantially liquid water impermeable. The composite sheet material includes an outer layer, a film, and a reinforcing layer and, preferably, has an ASTM D3833 water vapor transmission rate of greater than 250 g/m2/day, and a tensile strength of at least about 100 N/5 cm when tested in accordance with ASTM D5035. The sheet material is useful as a membrane for roofing, housewrap, insulation facing and in the fabrication of protective apparel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.