SUPER HIGH MOLECULAR WEIGHT POLYOLEFIN FINE PARTICLE, METHOD FOR PRODUCING THE SAME AND MOLDED BODY OF THE SAME

摘要

[Subject] The present invention provides ultra-high molecular weight polyolefin fine particles having a small particle diameter and a narrow particle size distribution, a molded article made of the fine particles and a sintered filter obtainable by sintering molding the ultra-high molecular weight polyolefin fine particles. [Means for solving the subject] The ultra-high molecular weight polyolefin fine particles comprising 1 to 50 ppm of a titanium atom and 1 to 1000 ppm of an aluminum atom, wherein the ultra-high molecular weight polyolefin fine particles have:
[A] an intrinsic viscosity, as measured in decalin at 135°C, of not less than 5 dl/g,
[B] an average particle diameter of not more than 20 µm, and
[C] a content of particles having a particle diameter of 0 to 40 µm of not less than 90 % by mass.