| abstract |
An object of the present invention is to provide a polyethylene polymer powder and a method for producing the same, which can improve the molding efficiency while maintaining the strength and wear resistance of the shape at a high level. The polyethylene polymer powder of the present invention comprises an ethylene homopolymer or copolymer, has an intrinsic viscosity IV of 12 dL / g or more and 35 dL / g or less, and a half-value width of a melting peak of 2 ° C. or more and 7 It is characterized by being not more than ° C., Span (laser particle size distribution measurement) being 0.9 or more and 2 or less, and α-olefin content being 0 mol% or more and 1.50 mol% or less. Moreover, the production method of the present invention is a method for producing the above-mentioned polyethylene-based polymer powder, comprising a polymerization step in which slurry polymerization of ethylene or ethylene and α-olefin is carried out using a loop reactor, The supply of the solvent and ethylene or the supply of the solvent, ethylene and α-olefin is performed in a plurality of supply series. [Selection figure] None |