| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition for a circuit breaker achieving high level flame resistance, GWIT property and HWI properties, and excellent in strength, arc resistance and hydrolysis resistance.SOLUTION: There is provided a polyester resin composition for a circuit breaker containing 100 pts.mass of polybutylene terephthalate resin (A), 5 to 30 pts.mass of a bromine flame resistant (B), 5 to 40 pts.mass of a triazine-based flame retardant (C), 2 to 12 pts.mass of an antimony-based flame retardant assistant (D) and 35 to 100 pts.mass of a flat cross section glass fiber having an average value of a ratio between a major axis and a minor axis (major axis/minor axis) of 1.5 to 8 (E). |
