| 摘要 |
PURPOSE:To manufacture a molding equipped jointly with excellent flexibility, mechanical strength, and low temperature shock resistance by a method wherein both components of a propylene block copolymer having a specific composition and polypropylene are directly molded with an injection molding machine without preliminarily fusion kneading. CONSTITUTION:A molding material is manufactured by molding both components of a propylene block copolymer having a specific composition and polypropylene directly with an injection molding machine without preliminarily fusion kneading. The propylene block copolymer is composed of a composition of 0.01-5wt.% of polybutene, 1-50wt.% of polypropylene, and 45-98.99wt.% of propylene-ethylene random copolymer. Then, the propylene ethylene random copolymer contains 20-80mol% of monomer unit based on ethylene and 80-20mol% of monomer unit based on propylene, and M1 is set at 0.1-50g/10min. |
