| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a resin composition for a large-sized high purity chemical container, which is reduced in the amount of fine particles and eluting components, and excellent in surface roughing resistance during molding. <P>SOLUTION: The polyethylene resin composition essentially contains a polyethylene resin component composed of a low molecular weight component and a high molecular weight component, and has been produced by the multistage polymerization using a Ziegler catalyst. The low molecular weight component is an ethylene homopolymer or a copolymer of ethylene with a 3-20Cα-olefin, having 3-50 g/10 min melt flow rate (MFR code D) and 960-974 kg/m<SP>3</SP>density. The high molecular weight component has 0.40-0.46 mass fraction to the composition. The composition has 955-965 kg/m<SP>3</SP>density, and 0.40-1.0 g/10 min MFR (code T); and contains substantially no additive. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
