PURPOSE: To secure the high adhesiveness between an outer pipe and an inner pipe by forming the second inner pipe layer from an acrylic rubber vulcanizate and forming the first outer pipe layer from an epichlrohydrine rubber vulcanizate and forming an interposed layer which possesses the superior close adhesiveness for both of the CSM vulcanizate and AFM vulcanizate.
CONSTITUTION: As for a multilayer rubber hose consisting of an inner pipe 11, reinforcing layer 5, and an outer pipe 13, the inner pipe 11 consists of the first inner pipe layer 11a and the second inner pipe layer 11b, and the first inner pipe layer 11a is prepared by a vulcanizate of the blend rubber (AFM) which contains acrylic rubber and PVDF and has the weight mixing ratio of the former/the latter = 95/5-40/60. The outer pipe 13 consists of the first outer pipe layer 13a and the second outer pipe layer 13b, and the first outer pipe layer 13a is formed form a vulcanizate of epichlorohydrine rubber, and the second outer pipe layer 13b is formed from a vulcanizate of chlorosulfonated polyethylene rubber (CSM). Accordingly, a multi-layer rubber hose which possesses the sufficient between-layer adhesiveness and is provided with high deterioration resistance for gasoline and abrasion resistance can be obtained.
TATEMATSU NOBUHITO
ICHIKAWA MASAYOSHI
