Protective film and sheet
US12358267B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2021 |
| Grant date | Jul 15, 2025 |
| Priority date | — |
| Expiry date | Sep 29, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A protective film containing a transparent polyolefin resin layer with improved or even superior weather resistance, and a sheet using the protective film. A protective film according to the present embodiment includes at least a transparent polyolefin resin layer. The transparent polyolefin resin layer contains a hindered amine light stabilizer represented by general formula (I) below in a range of 0.05 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of a transparent olefin resin included in the transparent polyolefin resin layer. (In general formula (I), R is an alkyl group having 1-18 carbon atoms, or a cycloalkyl group having 5-8 carbon atoms.)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.