| 摘要 |
PROBLEM TO BE SOLVED: To prevent the foaming in vulcanization by blending a predetermined range of silica and a predetermined range of silane coupling agent to an ethylene acryl rubber layer or an acryl rubber layer in a laminated rubber hose. SOLUTION: A laminated rubber hose includes an ethylene acryl rubber layer made of a copolymer of ethylene monomer and acryl monomer, or an acryl rubber layer as an inner layer and an outer layer, and manufactured by vulcanization and molding. Silica composed of synthetic silicic acid of 10-50 phr and a silane coupling agent of amino group, mercapto group, vinyl group, epoxy group, methacryl group and the like as a silicon compound of 0.05-3 phr are blended in the ethylene acryl rubber layer or the acryl rubber layer. Whereby the foaming can be effectively prevented even in the steam vulcanization under a normal low pressure.
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