| 摘要 |
PURPOSE: A resin prepared by blow molding a polyethylene resin having specified physical properties using compressed clean air in a clean room is provided, which is suitable for material of hollow molded products excellent in impact resistance and storing high purity chemicals. CONSTITUTION: The polyethylene resin such as high density polyethylene has a weight average molecular weight of more than 150,000, which is measured by a gel chromatography, a molecular weight distribution (weight average molecular weight/number average molecular weight) of 1 to 30, the amount of a low molecular weight extracted by hexane according to ASTM D5227 and residual metal of 0.1% by weight respectively. The blow molded product is prepared by blow molding the polyethylene resin using compressed clean air in a clean room keeping the degree of cleanness in a class below 1,000.
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