| 摘要 |
PURPOSE:An ethylene polymer composition excellent in moldability and mechanical properties, comprising an ethylene homopolymer and an ethylene copolymer and having properties within specified ranges. CONSTITUTION:The titled composition containing 15-90pts.wt. ethylene homopolymer (preferably, a combination of an ethylene homopolymer of an intrinsic viscosity eta of 12-25 with an ethylene homopolymer of an intrinsic viscosity eta of 0.2-1.5 at a mixing ratio of the former to the latter of 1:1-10) and 85- 10pts.wt. ethylene copolymer (e.g., ethylene/propylene copolymer) and satisfying the conditions of an intrinsic viscosity eta of 2.0-5.0dl/g, a density of 0.938- 0.970g/cm<3>, a swell ratio >= 1.30, log MI >= 0.81-0.69 (eta) (wherein MI is a melt index and eta is an intrinsic viscosity) and log MT >= 1-0.33 log MI (wherein MT is a melt tension). This composition is excellent in moldability, and can be molded by any of blow molding and injection molding, has excellent properties such as high rigidity, good fluidity during molding, and high environmental stress cracking resistance.
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