METHOD FOR PRODUCING HOSE WITH PROTECTOR LAYER

摘要

A method for manufacturing a hose with a protector layer 2 on the outer periphery of a tubular polyamide resin layer 1 includes steps of: preparing a rubber composition for forming the protector layer by separately preparing a first rubber material containing components (A) to (C) and a second rubber material containing components (a) and (b) but substantially free of a sulfur vulcanization agent and mixing them in a mixer; and forming the protector layer 2 by continuously vulcanizing unvulcanized rubber after continuous extrusion of the rubber composition onto the outer periphery of the previously formed polyamide resin layer 1.
(A) Ethylene-propylene rubber
(B) Sulfur vulcanization agent
(C) Thiuram vulcanization accelerator (mp. 66 to 105 °C)
(a) Ethylene-propylene rubber
(b) Vulcanization accelerator (mp. 120 °C or higher)