Polyethylene Powder and Molded Article Thereof

A polyethylene powder satisfying the following (Requirements 1 to 3):

• (Requirement 1):
• viscosity-average molecular weight (Mv) is 200,000 or more and 3,000,000 or less
• (Requirement 2):
• complex viscosity |η*|m obtained by measurement under the following <Conditions for Measurement of Slurry Viscoelasticity>satisfies the following formula (1):
• 590.0×(Mv×104)1.18≥|η*|m≥13.3×(Mv×10−4)1.18 (1)
• <Conditions for Measurement of Slurry Viscoelasticity>
• measuring apparatus:
• MARS Ill manufactured by Thermo Fisher Scientific K.K.
• stage:
• 20 mm ϕ
• plate:
• 20 mm ϕ parallel plate
• gap:
• 0.5 mm
• slurry composition:
• 30 parts by mass of a polyethylene powder, 70 parts by mass of a liquid paraffin
• (the polyethylene powder:
• a powder passing through a sieve having an opening of 425 μm in accordance with JIS Z 8801 standard is used for measurement)
• measurement conditions:
• complex viscosity |η*| is measured by the following steps 1 to 2:
• step 1 a slurry is kept at 100° C. for 2 min
• step 2 after the step 1, temperature is increased from 100° C. to 140° C. at 1° C./min, and viscoelasticity during the temperature increase is measured at a frequency of 1 Hz and a strain of 10% under a nitrogen atmosphere
• determination of |η*|m:
• a temperature at a point in time when a value of d(log|η*|)/dT associated with dissolution of the polyethylene powder first reaches 0.03 or less after passing a peak is regarded as a temperature at which the dissolution of the polyethylene powder is completed, and complex viscosity |η*| at the temperature is |η*|m
• (T is measurement temperature)
• (Requirement 3):
• a value of any peak when d(log |η*|)/dT is plotted against temperature is 1.0 or more and 3.0 or less.