POLYESTER LAMINATE FILM CONTAINING FINE BUBBLES FOR PHOTOGRAPHIC PRINTING PAPER

摘要

PURPOSE: To provide the polyester laminate film containing fine bubbles for the high-quality photographic printing paper high in surface smoothness and whiteness and low in production cost. CONSTITUTION: This film is forded by coextruding and laminating the polyester layer A having a density of >=1.3g/cm<3> on one or both sides of the polyester layer B containing a large number of fine independent bubbles and having a density of 0.40-1.30g/cm<3> and one of the surface of the outermost surface layer has a (b) value of <2.0 and the other surface layer has a surface roughness Ra is higher than Ra of the former surface layer.