| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an injection foamed product in which fine foamed cell structures are developed in injection expansion molding and foam having uniform size of foamed cells and excellent in mechanical properties is rationally and efficiently produced without depending on a part of the foam. SOLUTION: The method for producing propylene-based resin foam comprises melting a propylene-based resin composition containing 100 pts. wt. propylene-based resin (A), having 30-200 g/10 min MFR, in which isotactic pentad fraction of a propylene homopolymer or polymerization part of propylene alone is≥97.5% and 0.005-1 pt. wt. chemical foaming agent, introducing 0.01-2 wt.% physical foaming agent into a propylene-based resin composition in melted state, shaping the resin composition and carrying out expansion molding of the resin composition. COPYRIGHT: (C)2004,JPO&NCIPI |
