| 摘要 |
PURPOSE:To obtain the title film having excellent scratch resistance and friction coefficient by utilizing thermoplastic resin contg. particles and regulating a relation between the size of the particles and thickness of the film, the content and the thickness of the film to a specified range and specifying the Young's modulus of the film, the product of rupture strength and rupture strain and the flocculation energy density of thermoplastic resin. CONSTITUTION:A biaxially oriented thermoplastic resin film is constituted of thermoplastic resin A and particles as a main component. Young's modulus EA in the lengthwise direction of the film is regulated to at least 400 kg/mm<2>, the product sigmaA of rupture strength and rupture strain in the lengthwise direction is regulated to at least 20 kg/mm<2>. Mean particle diameter of these particles is regulated to 0.2-5 times of thickness of the film. The content of these particles is regulated to 0.1-30 wt.% and thickness of the film is regulated to 0.01-3mum. Further as the thermoplastic resin A, substance having flocculation energy density of at least 130 cal/mol is utilized and ethylene terephthalate and ethylene -2,6-naphthalate are prefereably utilized. As the particles, spherical silica particles based on colloidal silica and the particles (e.g. cross-linked polystyrene) based on a cross-linked high polymer, etc., are preferably utilized. |
