Process for producing support for use in formation of polyurethan films
US4569712A · kind A · utility
23Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1983 |
| Grant date | Feb 11, 1986 |
| Priority date | — |
| Expiry date | Sep 2, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/675
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process is dislosed for producing a support suitable for use in the formation of polyurethane films, the support comprising a base and a releasing layer on the base comprising a polymeric mixture of 95 to 65 parts by weight of polypropylene and 5 to 35 parts by weight of polyethylene, which process comprises extrusion coating the base with said mixture through a T-die to form the releasing layer on the base, the temperature of the mixture as extruded through the T-die being controlled below 300.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.