DAMPING RESIN COMPOSITION AND MOLDED ARTICLE USING THE SAME

摘要

A damping resin composition contains: 100 parts by weight of a polymer blend of 40 to 70% by weight of a polypropylene resin and 30 to 60% by weight of a thermoplastic elastomer; and 5 to 60 parts by weight of an inorganic filler, the thermoplastic elastomer comprising at least one member selected from the group consisting of an elastomer having a Tg of 0° C. to 20° C. and an elastomer having a Tg of -20° C. to 0° C. and an ethylene-alpha-olefin copolymer. Using this damping resin compostion, a vehicle rocker-panel molding, which is attached to the lower part of a vehicle side body is molded. The rocker-panel molding has a bottom section and a side section substantially perpendicular to the bottom section and having prescribed rigidity, showing a nearly L-shaped crosswise profile, in which the bottom section is thinner than the side section so that vibration energy generated on foreign matter's striking against the rocker-panel molding is forcibly converted to heat energy by the thinner bottom section thereby to suppress transmission of noise to the space of the automobile.