| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-layer injection molding comprising a hard layer excellent in rigidity and a flexible soft layer, even though a soft layer is not crosslinked, excellent in heat resistance capable of being used at 50°C or higher under the general living environment and further easy to recycle a material, and the manufacturing method. SOLUTION: The multi-layer injection molding body is composed of the hard layer comprising at least one or more kind of crystalline polyolefins (A) selected from the group consisting of an ethylene copolymer and a propylene copolymer having specific density and MRF, and the soft layer comprising an ethylene/α-olefin copolymer (B) to be manufactured by using a metallocene catalyst, and having specific density, MFR, Mw/Mn, a melting peak temperature, a melting transition heat and flexural rigidity. COPYRIGHT: (C)2004,JPO |
