| 摘要 |
PROBLEM TO BE SOLVED: To provide ultra-high molecular weight ethylene-based copolymer powder which allows a molded article to be obtained therefrom, which is excellent in wear resistance, strength, continuous processing productivity, has high product physical properties, and is excellent in long-term stability while keeping various other physical properties, and to provide a molding which is obtained by using the ultra-high molecular weight ethylene-based copolymer powder. ! SOLUTION: The ultrahigh molecular weight ethylene-based copolymer powder contains an ethylene unit and an α-olefin unit having 3-8 carbon atoms and has a viscosity-average molecular weight equal to or higher than 2,500,000 and lower than 10,000,000. A content of the α-olefin unit is 0.01-0.10 mol% of the total moles of the ethylene unit and the α-olefin unit. The ultra-high molecular weight ethylene-based copolymer powder has crystallinity of 80% or lower and a bulk density of 0.40-0.60 g/cm3. ! COPYRIGHT: (C)2015,JPO&INPIT |
