| 摘要 |
PURPOSE:To obtain the subject composition having excellent rigidity, heat- resistance, moldability, etc., and lessened problems of the lowering of tensile elongation, generation of odor and food hygienicity by compounding a crystalline polyester resin to a specific stereoregular polypropylene, etc. CONSTITUTION:The objective composition is produced by compounding (A) 100 pts.wt. of a stereoregular polypropylene having an isotactic pentad fraction in a boiling heptane insoluble component of >=0.955 and a 20 deg.C xylene-soluble polymer content of <=4.0wt.% or a block copolymer composed of propylene and ethylene or 4-6C alpha-olefin and containing >=65wt.% of the stereoregular polypropylene with (B) 0.005-7.0 pts.wt. of a crystalline polyester resin (preferably polybutylene terephthalate having an intrinsic viscosity of 0.08-3.0dl/g) and (C) a thermal oxidation stabilizer, a lubricant, etc. |
