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    • 4. 发明公开
    • MARINE HOSE AND METHOD FOR MANUFACTURING SAME
    • EP4425023A1
    • 2024-09-04
    • EP22886445.0
    • 2022-08-30
    • The Yokohama Rubber Co., Ltd.
    • NISHI TakaakiTAMADA YoshinoriTORIUMI Shuichi
    • F16L11/08B32B1/08B32B27/40
    • B32B1/08B32B27/40F16L11/08
    • To provide a marine hose including a urethane layer having a good wear resistance and a desired thickness on the outermost circumferential surface of the marine hose, which can increase the productivity of the marine hose, and a method for manufacturing the marine hose. A urethane layer (10) having a desired thickness and having a multilayer structure in which a urethane inner circumferential layer (11a) and a urethane outer circumferential layer (12) are layered in sequence is provided on an outer circumferential surface of a main hose body (3) subjected to vulcanization by vulcanizing the main hose body (3) and forming a sheet-shaped material (11T) made of a rubber composition containing millable urethane polymer into a urethane inner circumferential layer (11) by steam-vulcanizing, in a vulcanizer (4), a formed body obtained by layering the sheet-shaped material (11T) on the outer circumferential surface having a cylindrical shape in which reinforcing layers (5, 6, 7) are embedded between an inner surface layer (4) having a cylindrical shape and being unvulcanized and a cover layer (9), and by forming a liquid material (12T) made of a rubber composition containing castable urethane polymer into the urethane outer circumferential layer (12) by applying the liquid material (12T) on an outer circumferential surface of the urethane inner circumferential layer (11) and aging the liquid material (12T).