Biaxially oriented films containing layers of polyethylene naphthalate bibenzoate (PENBB) and process for the production of these films
US5919536A · kind A · utility
8Cited by
15References
27Claims
0Family size
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Inventors
Key dates
| Filing date | Apr 5, 1996 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Apr 5, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Biaxially oriented films containing at least one layer of polyethylene naphthalate bibenzoate (PENBB) copolyester wherein the copolyester contains from about 60 to about 40 mol % of a first recurring unit of the formula (II). ##STR1## and about 40 to about 60 mol % of a second recurring unit of formula (I). The copolyester preferably contains less than 10 mol % of recurring units derived from terephthalate or other dicarboxylic acids. The films have a total thickness of 0.05-500 .mu.m and may contain inert particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.