| abstract |
A biaxially oriented polyester film for a magnetic recording medium, which comprises an aromatic polyester resin composition comprising: (A) an aromatic polyester, (B) silicone resin particles which can be obtained by polymerizing a silane compound containing trialkoxysilane in the presence of a surfactant and water, contain at least 80 wt% of recurring units and are substantially spherical, and (C) other inert fine particles. This biaxially oriented polyester film for a magnetic recording medium has an extremely small number of coarse protrusions and excellent winding property, abrasion resistance and traveling durability and can be produced at a low production cost. |