| abstract |
A polyolefin composition for injection molding which comprises substantially a super-high molecular weight polyethylene such as one having a molecular weight of about 1,650,000 or more and a low molecular weight to high molecular weight polyethylene such as one having a molecular weight of about 1,500 to about 360,000. This composition is produced by a multi-stage polymerization process involving a step of producing super-high molecular weight polyethylene and a step of producing low molecular weight or high molecular weight polyethylene. |