| abstract |
PURPOSE: To obtain a biaxially stretched polyester film excellent in electrostatic property and surface flatness by adding an alkylphenylether sulfoacetate and/or a di(alkylphenylether) sulfosuccinate to polyester. n CONSTITUTION: 100pts.wt. polyester having ethylene terephthalate units as main repeating units is mixed with 0.1W10pts.wt. an alkylphenylether sulfoacetate (a) of the formula I and/or a di(alkylphenylether)sulfosuccinate (b) of the formula II, where R is an alkyl group, (m) is 0 or integer of 1W5, and (n) is integer of 1W 10. The resin composition is melted and extruded by T-die method, inflation method, etc., and the molding is further biaxially concurrently or in order to form a biaxially stretched film which is in turn thermally fixed. n COPYRIGHT: (C)1985,JPO&Japio |