The foaming Characteristic resin constituent for the high polyethylene foam canning electric wire production by inert gas foaming modulo canning and this, the high foaming insulating polyethylene canning electric wire null which

摘要

PROBLEM TO BE SOLVED: To provide a foaming material having the high foaming, even and fine cell structure by heating and kneading the high density polyethylene having a specified range of material value, polypropylene and ethylene--olefin copolymer, polysiloxane-polyether block copolymer and nucleus forming agent. ;SOLUTION: 100 pts.wt. of high density polyethylene having a DSC measured melting point at 127-136C, density at 0.945-0.967 g/cm3 and MFR at 0.1-10, and 2-50 pts.wt. of polypropylene having a melting point at 130C or more, and 50-200 pts.wt. of ethylene--olefin copolymer manufactured by metallocene catalyst having a melting point at 98-121C, density at 0.990-0.935 g/cm3, MFR at 0.5-3, and 0.1-5 pts.wt. of polysiloxane-polyether block copolymer expressed with a formula I, and 0.02-5 pts.wt. of one kind or more of azo-di-carbon amid and talc as a nucleus forming agent are blended, heated at 145-165C, and kneaded. In the formula, R represents an alkyl group, an alkoxy group or the like, X represents a formula II, (m) represents 5-300, and (n) represents 2-20.;COPYRIGHT: (C)2000,JPO