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

摘要

Disclosed are super high molecular weight polyolefin fine particles having small particle diameters and a narrow particle size distribution. Also disclosed are a molded body made of such super high molecular weight polyolefin fine particles, and a sintered filter obtained by sintering molding the super high molecular weight polyolefin fine particles. Specifically disclosed are super high molecular weight polyolefin fine particles containing 1-50 ppm of titanium atoms and 1-1000 ppm of aluminum atoms. The super high molecular weight polyolefin fine particles are characterized in that[A]the limiting viscosity[η]as measured in decalin at 135°C is not less than 5 dl/g,[B]the average particle diameter is not more than 20μm, and[C]particles having a diameter within the range of 0-40μm are contained in an amount of not less than 90% by mass.