LAMINATE FILM, OPTICAL FILM, POLARIZER PROTECTIVE FILM, POLARIZING PLATE, IMAGE DISPLAY DEVICE, AND METHOD FOR PRODUCING LAMINATE FILM

摘要

PROBLEM TO BE SOLVED: To provide a laminate film that has excellent adhesiveness to a polarizer and suppresses occurrence of blocking.SOLUTION: The laminate film of the present invention includes a highly adhesive layer that comprises a polyester-based resin, a hydrophilic group-containing resin, and a hydrophilic group-reactive crosslinking agent. When an amount of hydrophilic functional groups is calculated from contents of fluorine atoms and carbon atoms measured by ESCA method under the conditions that the surface of the highly adhesive layer is brought into contact with vapor of trifluoroacetic acid anhydride at 25°C for 10 minutes and then irradiated with X-rays from a direction at 90 degrees with respect to the surface, the amount A of hydrophilic functional groups is 4 to 25% on a basis of functional groups per one carbon atom. When an amount B of hydrophilic functional groups is obtained in the same procedure as above described except that the irradiation angle of X-rays is 20 degrees with respect to the surface, A and B satisfy 1