| 摘要 |
PROBLEM TO BE SOLVED: To improve an adhesive strength by providing an adhesiveness reformed layer consisting of copolymer of ester resin, acrylic resin, urethane resin and at least one kind of these copolymers on one surface of a polypropylene terephthalate film. SOLUTION: At least one surface of a polypropylene terephthalate film, an adhesiveness reformed layer is furnished which consists of ester resin, acrylic resin, urethane resin, and one kind of these copolymers. The adhesiveness reformed layer can be formed by applying application liquid on a biaxially oriented polyester film base material, or applying application liquid on an unoriented or uniaxially oriented polyester film base material to then be dried, and carrying out thermal fixation as required after performing uniaxial orientation or biaxial orientation. In this manner, a sufficient adhesive strength is obtained with the consequence that defects can be supplemented with respect to a polyethylene terephthalate film and a polyamide film. |
