| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition for vibration welding, which achieves excellent toughness of welded parts in a low-temperature environment and excellent toughness of welded parts with a resin composition containing no copolymerized polyester and provides a molding excellent in processability and heat resistance.SOLUTION: A polyester resin composition for vibration welding comprises (A) 10-90 pts. wt. of a polybutylene terephthalate resin having a melt flow rate under conditions of 250°C and 1,000 gf of 20 g/10 min or smaller, (B) 10-90 pts. wt. of a polyethylene terephthalate resin which contains a polyethylene terephthalate copolymer and has a melting point of 215-235°C, and relative to a combined content of (A) and (B) of 100 pts. wt., (C) 1-20 pts. wt. of a glycidyl-containing copolymer containing an α-olefin and a glycidyl ester of an α,&bgr;-unsaturated acid as copolymerization components and (E) 10-60 pts. wt. of a reinforcing fiber. |
