White polyester film and reflection sheet
US8197931B2 · kind B2 · utility
11Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Aug 11, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/254
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A white polyester film containing voids, wherein a resin constituting the film has a layer (layer A) formed by using a polyester resin and a cyclic olefin copolymerized resin, and wherein a void ratio taken in a cross-section of the layer is more than 25% and 75% or less and the average particle size of the cyclic olefin copolymerized resin in the film is 0.1 μm or more and 3 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.