| 摘要 |
PURPOSE: A chrome-based mixed catalyst for an olefin polymerization is provided to apply the catalyst to a yarn molding resin and a mono-filament using high density polyolefin. CONSTITUTION: A chrome-based mixed catalyst for an olefin polymerization contains a mixture including 20~80wt% of silica-titania-cromia tergels catalyst and 80~20wt% of silica-cromia catalyst. The tergels catalyst contains 0.5~2.5wt% of Ti, 0.5~2.0wt% of Cr. The tergels catalyst is activated by plasticizing 4~8 hours at 650~850 deg C.
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