| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyethylene resin composition for bottle cap, having excellent dimensional stability in storage at normal temperature and high temperature when used as a bottle cap and having rigidity, impact strength, moldability, stress cracking resistance, etc. <P>SOLUTION: The polyethylene resin composition for bottle cap is a copolymer of ethylene and a 3-20C α-olefin and satisfies the requirements (a) to (f). (a) The MFR of cord D is 1.0-8 g/10 min; (b) the MFR of cord G is 120-400 g/10 min, (c) the ratio FRR(G/D) of the MFR of cord D to the MFR of cord G is ≥45; (d) the density is ≥955 kg/m<SP>3</SP>; (e) the content (FL) of the component having a molecular weight of ≤1,000 measured by high-temperature GPC is 0.2-4 wt.% and (f) the content (FH) of the component having a molecular weight of ≥1,000,000 measured by high-temperature GPC is 0.3-5 wt.%. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
