Vapour-barrier membrane based on a PA666/EVOH blend
US9719246B2 · kind B2 · utility
0Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2013 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Oct 31, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/081
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a vapor retarder membrane, intended to be used for improving the airtightness of a building or of a room, comprising at least one active layer having a water vapor permeability which increases with the surrounding relative humidity, said active layer comprising at least 90% by weight of a blend of ethylene/vinyl alcohol (EVOH) copolymer and of a copolyamide 6-6.6 (PA666), the latter having a melting point below 210° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.