| 摘要 |
PURPOSE:A polyester resin composition for molding having improved crystallization rate, obtained by blending a polyester having ethylene terephthalate as a main repeating unit with a tetrafluoroethylene (co)polymer having an average particle diameter of specific value. CONSTITUTION:(A) 100pts.wt. polyethylene terephthalate or polyester having >=80mol% ethylene terephthalate repeating unit is blended with (B) 0.001-2pts. wt., preferably 0.002-1.5pts.wt. polytetrafluoroethylene or copolymer consisting essentially of tetrafluoroethylene having <=100mum, preferably <50mum average particle diameter and, if necessary, a crystal nucleus forming agent, a filler, etc., before polycondensation reaction of the component A is completed or the whole components are dried, blended and extruded in a molten state by an extruder, to give the aimed composition. |
