Polyester film
US5562984A · kind A · utility
10Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Mar 30, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyester film contains a polyester having an intrinsic viscosity (IV) in the range from 0.65 to 0.8 and an antioxidant. The polyester has an endothermic high temperature peak at a temperature of (A).degree.C. and an endothermic low temperature peak at a temperature of (B).degree.C., both peaks being measured by differential scanning calorimetry (DSC), and the value of (A-B) is in the range from 25.degree. C. to 50.degree. C. The polyester film is suitable for use an insulation film, exhibiting improved ageing properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.