BIAXIALLY-ORIENTED POLYESTER FILM HAVING EXCELLENT ABRASION RESISTANCE

摘要

PURPOSE:To provide a polyester film also having excellent abrasion resistance while making travelling and flatness coexist by forming a large number of projections based on fine particles onto the surface of the polyester film. CONSTITUTION:A large number of projections based on fine particles are formed onto at least one surface of a biaxially-oriented polyester film, and surface roughness at a time when a section, where there is no projection based on fine particles in said film surface, is measured by an interatomic power microscope is 0.2-2nm on an average.