| 摘要 |
The object the present invention is to provide an exterior molding body for automobile which is reinforced by a long fiber, is excellent in mechanical properties such as bending elastic modulus and bending strength, chemical resistance and heat resistance, is lightened, has high designability and is reduced in the anisotropy of linear expansion coefficient of molding body caused by the fiber orientation at filling thereof to a mold. In an aspect of the present invention, there is provided an exterior molding body comprising a long fiber reinforced thermoplastic resin having such properties that: the content of long fiber dispersed in the molding body is 30 to 90% by weight, the average fiber length of long fiber is 1.5 to 10 mm, the maximum project area of said molding body is not less than 20000 mm<2>, the molding body has such a shape that the length of narrow resin flow path at the portion having not more than 100 mm<2> of cross sectional area in the mold cavity at the molding is not more than 150 mm, the maximum linear expansion coefficient at a portion of said molding body having a wall thickness of not less than 2 mm is not more than 5 X 10 -5 K<-1> and the ratio of maximum linear expansion coefficient/minimum linear expansion coefficient is not more than 1.8. |
