Laminated film
US10513098B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Feb 27, 2017 |
| Grant date | Dec 24, 2019 |
| Priority date | — |
| Expiry date | Feb 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/0231
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A protective film is capable of protecting and preserving an optical sheet surface, particularly the back surface of a prism sheet, independent of the shape and composition thereof in a range of adhesive forces appropriate for various adherends. A layered film having an adhesive layer having a styrene-based elastomer as the main component thereof on at least one surface of a base material layer, the layered film characterized in that the loss tangent tan δ and the shear storage modulus G′ of the elastomer at 1 Hz in a temperature range of 30-60° C. are within specific ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.