Surface-protective film-attached polarizing film, and method for producing polarizing film
US11204447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2017 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Apr 2, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2457/202
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A surface-protective film attached polarizing film is disclosed which includes a polarizing film (A) having a thickness of 100 μm or less, and a surface-protective film (B) provided on at least one surface of the polarizing film (A), wherein the polarizing film (A) comprises a polarizer, and a protective film provided on at least one surface of the polarizer, the polarizer comprises a polyvinyl alcohol-based resin and has a thickness of 10 μm or less, the polarizing film (A) has a width WA, the surface-protective film (B) has a width WB, a difference between the widths WA and WB (WA−WB) is 3 mm or more, and a peel strength of the surface-protective film (B) to the polarizing film (A) is 0.2 N/25-mm or less. The surface-protective film-attached polarizing film allows to be restrained the polarizing film from being broken, when the surface-protective film is peeled from the polarizing film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.