Surface-protecting film
US10245811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2014 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | May 2, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2453/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The surface protective film of the present invention is characterized in that the film comprises a polyolefin-based substrate layer and a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer contains at least a styrene-based elastomer, an acrylic-based pressure-sensitive adhesive and a tackifier, and in the pressure-sensitive adhesive layer, the styrene-based elastomer is blended in an amount of not less than 50% by mass but not more than 90% by mass based on the total amount of the pressure-sensitive adhesive layer, the acrylic-based pressure-sensitive adhesive is blended in an amount of not less than 1% by mass but not more than 40% by mass based on the total amount of the pressure-sensitive adhesive layer, and the tackifier is blended in an amount of not less than 1% by mass but not more than 49% by mass based on the total amount of the pressure-sensitive adhesive layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.