PROBLEM TO BE SOLVED: To provide an ultrahigh molecular weight polyethylene powder capable of providing an ultrahigh molecular weight polyethylene fiber having uniform yarn diameter, capable of highly extending and continuously spinning.;SOLUTION: There is provided an ultrahigh molecular weight polyethylene powder having viscosity average molecular weight is 10×104 to 1000×104, and difference between a temperature to reach 80% torque value of maximum torque value and a temperature to reach 20% torque value of the maximum torque value in a measurement of torque value under following mix condition of 0.1°C to 50°C. mix condition Raw materials: A mixture containing 5 pts.mass of the ultrahigh molecular weight polyethylene powder and 95 pts.mass of a liquid paraffin based on 100 pts.mass of total of the ultrahigh molecular weight polyethylene powder and the liquid paraffin. Torque value measurement: After mixing the raw materials at 130°C for 30 min, further they are mixed at 240°C for 15 min; temperature rise rate to 130°C to 240°C is 22°C/min.; screw rotation number is 50 rpm; under nitrogen atmosphere.;SELECTED DRAWING: None;COPYRIGHT: (C)2019,JPO&INPIT
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