Pressure-sensitive adhesive sheet having a transparent pressure-sensitive adhesive layer
US10072184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2015 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | Jan 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pressure-sensitive adhesive sheet comprises a support and a transparent pressure-sensitive adhesive layer on the support. The pressure-sensitive adhesive layer comprises a base adhesive zone made essentially of a transparent base pressure-sensitive adhesive material and formed over a given range from a first principal surface of the pressure-sensitive adhesive layer in a thickness direction of the pressure-sensitive adhesive layer, and a transparent, adherent, refractive index-adjusting zone formed over a given range from a second principal surface of the pressure-sensitive adhesive layer in the thickness direction, and wherein the refractive index-adjusting zone has a refractive index greater than a refractive index of the base pressure-sensitive adhesive material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.