THERMOPLASTIC RESIN COMPOSITION FOR IMPACT ABSORBING MEMBER AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a thermoplastic resin composition for impact absorbing members that is obtained by blending 1-200 parts by weight of an inorganic filler (C) to 100 parts by weight in total of 50-80 parts by weight of a thermoplastic resin (A) and 20-50 parts by weight of a gummous polymer (B) having a reactive functional group, wherein: the thermoplastic resin (A) forms a continuous phase; the gummous polymer (B) having a reactive functional group forms a disperse phase; the inorganic filler (C) is dispersed in the continuous phase and/or the disperse phase; the thermoplastic resin composition contains, in the disperse phase (B) of the gummous polymer (B), greater than or equal to 10% by area of particles having particle sizes of 1-100 nm and formed of a compound produced by a reaction between the thermoplastic resin (A) and the gummous polymer (B); and the load-displacement curve at the time of subjecting a square pillar to high-speed compression under specific conditions has a rectangular waveform having high load and large displacement. The present invention provides a thermoplastic resin composition that: is suitable for impact absorbing members; is excellent in strength, rigidity, and heat resistance; and is resistant to breaking upon high-speed compression and can achieve a rectangular waveform having high load, even as a molded product having a simple shape.