Electrical insulating materials made partly or wholly of polyester film
US4868035A · kind A · utility
8Cited by
6References
15Claims
0Family size
Inventors
Key dates
| Filing date | May 16, 1988 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | May 16, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/691
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Improved electrical insulating tapes are disclosed having a poly(ethylene terephthalate) film component. The film has one amorphous surface and an opposite crystalline surface. In a preferred embodiment, a composite insulating material is provided having the film component with a fiber glass yarn strand layer adhered thereto. The fiber glass yarn strands are substantially continuous and uninterrupted, and are substantially parallel to the axis of elongation of the tape, and to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.