Polarizing film, pressure-sensitive-adhesive-layer-attached polarizing film, and image display device and method for continuously producing same
US10345500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2016 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Apr 15, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B27/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention pertains to a polarizing film having a transparent resin layer on at least one side of a polarizer containing a polyvinyl alcohol-based resin, wherein the transparent resin layer has a thickness of 0.2 μm or more and is formed from a layer-forming material containing a polyvinyl alcohol-based resin having a saponification degree of 96 mol % or more, and wherein the combined total content of sodium acetate and potassium acetate contained in the transparent resin layer is less than 1 wt %. This polarizing film has crack-resistant properties, and can minimize degradation of the optical characteristics in a heating and humidifying test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.