| 摘要 |
PURPOSE:To obtain the titled composition, having excellent rigidity, transparency, impact whitening resistance, etc., and suitable as various packaging materials, containers, electrical appliance product parts, etc., by blending a specific propylene homopolymer with a specific styrene based block copolymer in a specific amount. CONSTITUTION:A composition obtained by blending highly crystalline propylene homopolymer having a relationship between isotactic pentad fraction (P) and melt flow rate (MFR) expressed by the formula 1.00>=P>=0.015logMFR+0.955 with 5-30wt.% styrene-ethylene.butylene-styrene block copolymer or styrene- ethylene.propylene block copolymer, preferably further <=15wt.% ethylene- propylene based copolymer rubber and/or <=15wt.% polyethylene. The blending ratio of the above-mentioned highly crystalline propylene homopolymer is >=60wt.% based on the composition. |
