Optical film and method for manufacturing same, polarization plate, and liquid crystal display apparatus
US10240033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2015 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Jul 31, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The optical film of the present invention is an optical film including a thermoplastic resin, in which the optical film has a moisture permeability of 70 g/m2/day or less (in terms of a film thickness of 40 μm), and contains a moisture permeability-reducing compound having a molecular weight of 200 or more and satisfying Formula (1) described below. Formula (1) A/B≤0.9 (A represents a moisture permeability of an optical film in a case in which 10 mass % of the moisture permeability-reducing compound is added to the mass of the thermoplastic resin, and B represents a moisture permeability of an optical film in a case in which the thermoplastic resin is included and the moisture permeability-reducing compound is not added.)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.