| 摘要 |
PURPOSE:To provide a polyester compsn. which has good moldability and gives moldings having excellent surface gloss and mechanical properties, by blending a specified nucleating agent, a crystallization accelerator and a reinforcing fiber with polyethylene terephthalate. CONSTITUTION:100-pts.wt. polyethylene terephthalate or polyester composed of at least 80mol% of an ethylene terephthalate repeating unit, 0.05-10pts.wt. at least one member selected from among an inorg. nucleating agent having an average particle size of 50mu or below (e.g. talc or silica) and an org. compd. (or high-molecular compd.) contg. metal carboxylate groups, 0.3-15pts.wt. ester compd. of the formula (wherein R1 is alkylene; R2, R3 are each alkyl, benzyl, etc.; m, n are each 1 or greater) derived from an aliph. dibasic acid, and 0- 150pts.wt. reinforcing fiber (e.g. glass fiber) are mixed together to obtain the desired polyester compsn. |
