| 摘要 |
A glass fiber reinforced resin composition suitable as an injection molding material for automobile instrument panels. Essentially the resin composition is a blend of 55-77 wt % of a propylene-ethylene block copolymer at least partially modified by graft copolymerization with an unsaturated carboxylic acid or its derivative, 5-15 wt % of an ethylene-propylene rubber in which the content of ethylene is 60-85 wt % and 18-30 wt % of glass fiber having a filament diameter of 8-15 mu m. The melt flow index of the modified propylene-ethylene block copolymer and the Mooney viscosity of the ethylene-propylene rubber are strictly specified. The resin composition is pelletized from a melted state such that the glass fiber dispersed in the pellets is not smaller than 550 mu m and, preferably, not greater than 1100 mu m in mean filament length. This resin composition is good in moldability and provides instrument panels high in rigidity, in heat distortion resistance and also in impact resistance. |
