Polyester films, their use for obtaining composite films and resultant composite films
US5242757A · kind A · utility
40Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Orientated semi-crystalline polyester films characterized in that they have a planar orientation coefficient .DELTA.p of greater than or equal to 165.times.10.sup.-3 and a degree of transverse shrinkage of less than or equal to 2.7% at 200.degree. C. These films are suitable as a support for obtaining composite films by extrusion-coating of an olefin polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.