METHOD AND MATERIAL FOR PREVENTING WARPAGE OF OPTICAL FILM

摘要

PROBLEM TO BE SOLVED: To provide a multilayer optical body having improved dimensional stability.

SOLUTION: A production method for an optical body in this invention involves a process for providing a multilayer reflective optical film with birefringence containing primary and secondary optical layers interlaminated, and a process for extrusion coating the first principle surface of the multilayer reflective optical film having birefringence with a flexible transparent layer having dimensional stability.

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