RETARDATION FILM FOR FLEXIBLE DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide a retardation film for a flexible display having a small absolute value of photoelastic coefficient and a high retardation value and excellent also in balance of folding resistance and transparency.

SOLUTION: The retardation film contains a copolymer obtained by copolymerizing an isopropenyl aromatic monomer and a vinyl aromatic monomer, and it is obtained by at least uniaxial stretching the film and has high heat resistance, a low photoelastic coefficient and folding resistance.

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