| 摘要 |
PROBLEM TO BE SOLVED: To improve adhesiveness to a ultraviolet curable resin, blocking resistance, and lubricity by forming an acryl-modified polyurethane having a specified acrylic resin component/polyurethane resin component weight ratio at least on one side of a polyester film in a specified application thickness. SOLUTION: At least on one side of a polyester film. an acryl-modified polyurethane having an acrylic resin component/polyurethane resin component weight ratio of 3/7-7/3 is formed to have an application thickness after drying of 0.1-2μm. In the production of the acryl-modified polyurethane, for example, an acrylic compound is dispersed in an aqueous polyurethane, and they are reacted to obtain an aqueous dispersion. The production method of the adhesive polyester film includes, for example, a method in which the aqueous dispersion of the acryl-modified polyurethane is applied on the base polyester film, or a method in which the application is done in a process for producing a biaxially oriented polyester film. |
