Tubular body for water supply hot water supply, water supply hot water supply hose, and a manufacturing method of water supply hot water for the tubular body

摘要

PROBLEM TO BE SOLVED: To provide a pipe body having the improved flexibility, chlorine water resistance, and hygiene. ;SOLUTION: This water and hot water feed pipe body is so constituted that the inner layer 3 comprises silane crosslinked polyethylene with the density 0.91-0.94 g/cm3, and the outer layer 2 comprises flexible silane crosslinked polyolefin with the density 0.85-0.90 g/cm3 formed by contacted with moisture and crosslinked after melting and mixing a composition comprising (i) base polymer including one or more olefin copolymer, (ii) carrier polymer P1 containing organic unsaturated silane of a general formula RR'SiY2 (where R is a monohydric olefin unsaturated hydrocarbon group, Y is a hydrolytic organic group, and R' is a monohydric hydrocarbon group except for aliphatic unsaturated hydrocarbon or same to Y) and free radical generating agent and substantially having no water, and (iii) a carrier polymer P2 containing silanol condensed catalyst and antioxidant, at the temperature higher than the crystal melting point of the base polymer as the main material.;COPYRIGHT: (C)2001,JPO