Patent ID: 7821740
Filing Date: 2010-10-26
Classification: C08G,C08L,G11B

Abstract:
1. A ramp which is obtained by molding a resin composition comprising: (A) 100 parts by weight of a polyoxymethylene resin, and (B) 0.1 to 10 parts by weight of a polyolefin resin selected from the group consisting of high-density polyethylene, medium-density polyethylene, high-pressure low-density polyethylene, straight-chain low-density polyethylene, ultra-low-density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, propylene-butene copolymer, polybutene, hydrogenated polybutadiene, ethylene-acrylic ester copolymer, ethylene-methacrylic ester copolymer, ethylene-acrylic acid copolymer and ethylene-vinyl acetate copolymer, and provided that said ramp is a ramp for a hard disc; wherein the ramp is used after it is washed with at least one solvent selected from the group consisting of halogen-containing solvents, aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, liquefied carbon dioxide gas, surfactant-containing water, and pure water.