Importance

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Abstract

The optical film with pressure sensitive adhesive comprises an optical film and a front-side pressure sensitive adhesive sheet. The front-side pressure sensitive adhesive sheet is a laminated pressure sensitive adhesive sheet and includes a first pressure sensitive adhesive layer disposed in contact with the optical film, and a second pressure sensitive adhesive layer disposed at the furthest from the optical film. The first pressure sensitive adhesive layer has a storage elastic modulus of 9×10³ Pa or less at 150° C., and a ratio G′₂₀/G′₁₅₀ of 20 or more, where G′₂₀ is a storage elastic modulus at 20° C. and G′₁₅₀ is a storage elastic modulus at 150° C. The second pressure sensitive adhesive layer has a storage elastic modulus of 4×10⁵ Pa or less at 20° C., and a storage elastic modulus of 1×10⁴ Pa or more at 150° C.

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First Claim