To eminently improve the mechanical strength of a place necessary for a fiber-reinforced thermoplastic resin molding.
In the fiber-reinforced thermoplastic resin molding, the average content of reinforcing fibers is 5-70 wt.%. A resin joint part having an internal rib effect in the direction of force applied to the molding is formed at a position needing strength in the molding so that an X layer, a Y layer, and a Z layer meet conditions in which the X layer is a fiber-reinforced thermoplastic resin layer with a matrix formed by the thermoplastic resin and has a thickness of 10 mm or below and the content of the reinforcing fibers of 5-70 wt.%; the Y layer is a non-reinforced thermoplastic resin layer having a thickness of 0.05 mm or below and the content of the reinforcing fibers of below 5 wt.%; and the Z layer is a fiber-reinforced thermoplastic resin layer with a matrix formed by the thermoplastic resin and has a thickness of 10 mm or below and the content of the reinforcing fibers of 5-70 wt.%.
ISHIZAWA HIROYASU
KAWAZOE TETSUHIRO
KATAYAMA MASAHIRO
KOSAKA SHIGEYUKI
