Breathable film compositions and articles and method
US6191221A · kind A · utility
27Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Sep 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J5/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A breathable film is composed of a uniform blend of two thermoplastic resins, one having a high moisture vapor transmission rate and the other having a low rate. The blend is melt extruded into a film having good handling characteristics and a controlled degree of moisture vapor transmission, as determined by blend ratio per unit of film thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.