| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite molding made by strongly joining a molding composed of a thermoplastic elastomer composition to a molding composed of a polypropylene-based resin by vibration welding to integrate. SOLUTION: The composite molding is made by integrating the molding 2 composed of the polypropylene-based resin (A) and the molding 1 composed of the thermoplastic elastomer composition (B) into one body by vibration welding. The polypropylene-based resin (A) shows a bending modulus of not less than 1,000 MPa and has a melting peak temperature of not lower than 160°C measured by a differential scanning calorimeter, and the thermoplastic elastomer composition (B) contains a polypropylene-based polymer having a melting peak temperature, whose difference from that of the polypropylene-based resin (A) being not more than 10°C, and an ethylene-propylene-based copolymer rubber, and shows a bending modulus of 150 to 800 MPa. COPYRIGHT: (C)2009,JPO&INPIT |
