| 摘要 |
PURPOSE:To obtain a film having high transparency and excellent bondability, slipperiness, abrasion resistance, blocking resistance, handleability, etc., by forming a specific coating film containing acrylic resin, etc., on a film surface. CONSTITUTION:The objective polyester film having a haze value of <=4% and a frictional coefficient (mus) of <=0.8 is produced by forming a coating film composed of (A) 10-80wt.% of an acrylic resin having a second-order transition point (Tg) of 5-110 deg.C (preferably 10-90 deg.C), (B) 15-85wt.% of a polyester resin having a second-order transition point (Tg) of 5-100 deg.C (preferably 10-70 deg.C) and (C) 5-30wt.% of a surface-roughening substance having an average particle diameter of <=0.5mum on at least one surface of a polyester film. The acrylic resin is an aqueous dispersion of a copolymer produced by using an alkyl acrylate or alkyl methacrylate as a main monomer and copolymerizing with other monomers. The polyester resin is an aqueous dispersion of a polymer containing an ester unit of terephthalic acid component and 1,4 butanediol component. |
