Method and apparatus for producing a polarized resin film
US10084292B2 · kind B2 · utility
1Cited by
1References
14Claims
0Family size
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Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Nov 30, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object of the present invention is to provide a polarized vinylidene fluoride/tetrafluoroethylene copolymer resin film that can significantly reduce, when used as an optical film, the deterioration of the quality of video or still images formed by display elements.The present invention provides a polarized vinylidene fluoride/tetrafluoroethylene copolymer resin film having 2,000 or fewer spot defects per m2, the number of spot defects being measured by a defect measurement method;
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.