Birefringent polyester film with low haze having specified Tan Delta value
US10067278B2 · kind B2 · utility
1Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jul 31, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/28
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A birefringent polyester film includes naphthalate units, ethylene units, a titanate compound, a planar branching unit, and 1 to 80 ppm metal content. The birefringent polyester film has an out-of-plane birefringence of at least 0.1 at 633 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.