| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyolefin-based resin material for producing a blow molded container, fuel tank, pipe, etc., as a thin thickness products excellent in the long term performance by improving its long term performances such as a molding stability in thin thickness molding, etc., and stress-cracking resistance, etc., in a good balance. <P>SOLUTION: This polyolefin-based resin material obtained by melting/mixing/kneading the polyolefin-based resin satisfying a condition of having a strain curing parameter of viscosity under stretch,λ>0, and having a long chain branch is provided with that its high load melt flow rate (HLMFR; at 190°C, under 21.6 kg load) and swell ratio (SR) satisfy the following relational formulae. The relational formulae are: HLMFR<SB>1</SB>/HLMFR<SB>0</SB>>1.00 and SR<SB>1</SB>/SR<SB>0</SB><1.00 [wherein, HLMFR<SB>0</SB>and SR<SB>0</SB>are values before extrusion, and HLMFR<SB>1</SB>and SR<SB>1</SB>are values after extruded twice]. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
