Sheet-like structure of polyurethane, which is capable of absorbing water vapor and transmitting water vapor
US4181637A · kind A · utility
10Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1977 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | Dec 22, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31971
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a sheet-like structure of polyurethane, which is capable of absorbing water vapor and transmitting water vapor, with a uniformly incorporated additive composed of solid particles of at least one swellable, modified polymer. The invention also relates to a process for manufacturing the sheet-like structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.