Voided films of polyester with polyolefin particles
US4187113A · kind A · utility
80Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1977 |
| Grant date | Feb 5, 1980 |
| Priority date | — |
| Expiry date | Nov 3, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31536
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Opaque voided films having a total luminous transmission not exceeding 25% are made from blends of a polyester preferably polyethylene terephthalate, with 3 to 27% of an ethylene or propylene polymer, prepared by dry blending. One end use of the film, as a base for photographic prints is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.