POLYETHYLENE-BASED RESIN COMPOSITION AND CROSSLINKED POLYETHYLENE PIPE

摘要

PROBLEM TO BE SOLVED: To provide a polyethylene-based resin composition, capable of giving such a silane-crosslinked polyethylene pipe that formation of gum caused by bleedout of an antioxidant or a lubricant is decreased, when molded, and therefore failure in molding is decreased, and the antioxidant or the lubricant is made to be difficult to migrate to a surface of a molded product, even when used for a long period, and to provide the crosslinked polyethylene pipe given from the resin composition.;SOLUTION: This polyethylene-based resin composition is given by mixing an ethylene-vinyl acetate copolymer into a mixture in an amount of 1-5 wt.% based on the mixture, wherein the mixture contains a silane-modified polyethylene which is formed by mixing a silane compound and a polyethylene-based resin and conducting graft reaction thereof and the ethylene-vinyl acetate copolymer has a number-average molecular weight of 2,000-4,000, a density of 920-940 kg/m³, and a vinyl acetate content of 8-20 wt.%.;COPYRIGHT: (C)2007,JPO&INPIT