DOUBLE-LAYER RUBBER HOSE AND MANUFACTURE THEREOF

摘要

PURPOSE:To provide a double-layer rubber hose capable of corresponding to the demand of the lengthening of useful life in a fuel hose. etc., CONSTITUTION:A double-layer rubber hose has a fluororubber (FKM) layer 1 and a nitrile rubber (NBR) layer 3 adjacent to the FKM layer 1. (a) the FKM layer 1 used a three-dimensional FKM as a rubber component, and formed of an organic polyol vulcanization group KM compound combining quaternary ammonium salt, and a vulcanization induction time (T10) is compounded and designed so as to satisfy formula four min <= T10+(set vulcanizing temperature -170 deg.C)min/10 deg.C <= seven min. (b) the NBR layer 3 is formed of the organic peroxide vulcanization group rubber compound of NBR, into which a functional group having active hydrogen is introduced.