Patent ID: 8808821

Claim:
A material roll, comprising: an optical film; a first base film disposed on a first surface of the optical film with a first pressure-sensitive adhesive layer interposed between the first surface of the optical film and the first base film; and a second base film disposed on a second surface of the optical film with a second pressure-sensitive adhesive layer interposed between the second surface of the optical film and the second base film, wherein an adhesive power A of the first pressure-sensitive adhesive layer at an interface on the first base film side, an adhesive power B of the first pressure-sensitive adhesive layer at an interface on the optical film side, an adhesive power C of the second pressure-sensitive adhesive layer at an interface on the optical film side, and an adhesive power D of the second pressure-sensitive adhesive layer at an interface on the second base film side satisfy the relationships A<B and A<C<D, and the optical film is wound so that the first base film is on an outer side and the second base film is in an inner side, wherein the adhesive power A is 0.05 to 0.3 N; wherein the adhesive power B is 10 to 30 N; wherein the adhesive power C is 0.3 to 1.5 N; and wherein the adhesive power D is 2 to 10 N; and wherein the optical film includes a laminated film including at least one of a polarizing film, a retardation film, and a brightness enhancement film.