| abstract |
A polyethylene resin composition comprising 15 to 90% by weight of a polyethylene resin composition (A) and 85 to 10% by weight of a polyolefin resin composition (B), wherein the polyethylene resin composition (A) comprises ultra-high-molecular weight polyethylene (component (a-1)) having an intrinsic viscosity [η] of 10 to 40 dl/g and low-molecular weight to high-molecular weight polyethylene (component (a-2)) having an intrinsic viscosity [η] of 0.1 to 5 dl/g, the amount of said component (a-1) being more than 35% by weight and not more than 90% by weight, the amount of said component (a-2) being not less than 10% by weight and less than 65% by weight, each amount being based on the total amount of the component (a-1) and the component (a-2), and the polyethylene resin composition (A) has a density of 930 to 980 kg/m 3 and an intrinsic viscosity [η] of 5 to 35 dl/g. The polyethylene resin composition is excellent in at least the following properties (1) to (8): (1) mechanical properties (mechanical properties equal to or higher than those of conventional ultra-high-molecular weight polyethylene), (2) abrasion resistance (abrasion resistance remarkably improved or enhanced as compared with that of conventional ultra-high-molecular weight polyethylene), (3) appearance, (4) moldability, (5) self-lubricating properties, (6) chemical resistance, (7) impact resistance (impact strength), and (8) flexibility. |