Preventive film for polarizer and polarizing plate using the same

摘要

A preventive film for a polarizer which comprises a non-oriented two-layer film comprising a polycarbonate film having a glass transition temperature of 100° C. or higher and, laminated on one surface thereof, a polyester him: a preventive film for a polarizer which comprises a non-oriented three-layer comprising a polycarbonate film having a glass transition temperature of 100° C. or higher and a polyester film laminated on one surface thereof and a polybutylene terephthalate film laminated on the other surface thereof and a polarizing pate which uses a polarizing film comprising a polarizer and two sheets of the above film adhered by heating with no use of an adhesive agent to both sides thereof. The preventive film exhibits an extremely small double refraction and is capable of being adhered directly to a polarizer through heating and the polarizing plate can be produced at a low cost.