| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject resin that is suitable for production of injection- molded products excellent in mechanical properties as tensile strength, flexural modules and the like, the fixed strain environmental stress cracking by mainly adding the polyethylene having a density and the like in specific ranges. SOLUTION: The objective resin contains (A) polyethylene having the density of 0.880-0.960 g/cm<3> , preferably 0.900-0.925 g/cm<3> ; the melt flow under 2.16 kg load (MFR2.16 ) at 190 deg.C of 0.01-200 g/10 min, preferably 3-50 g/10 min; the ratio of MFR10.0 /MFR2.16 (where the former is the MFR under 10.0 kg load at 190 deg.C) of 3-10, preferalby 3-8; the ratio of Mw/Mn (the weight-average weight to the number-average molecular weight) of 2.0-4.0, preferably 2.2-3.7 and the swell ratio(SR) of <1.35, preferably SR<=1.25 and (B) when desired, a polymer other than the component A in an amount of <=30 wt.% based on the whole polymers. The component A is preferably produced by using a single site catalyst. |
