Process for manufacturing composite flexible hose

Details Process for manufacturing composite flexible hose Process for manufacturing composite flexible hose

1994-07-15

1996-02-06

Scherbel, David

Pipes and tubular conduits

Flexible

Braided, interlaced, knitted or woven

138126, 138137, 138124, 428 362, F16L 1108

Patent

active

054889740

ABSTRACT:
The present invention relates to a composite flexible hose excellent in pliability without any adhesive layer between an innermost layer and an intermediate rubber layer. The hose consists of the innermost layer, the intermediate rubber layer, a fibrous reinforcement layer and an external rubber layer, each of which is formed in this order from the inside. The innermost layer is formed of a modified polyamide obtainable by blending of a polyamide and a carboxyl-containing modified polyolefin, and the intermediate rubber layer is formed of a rubber composition obtainable by a blend of 10 to 50 parts by weight of silicic acid or a salt thereof and 5 to 15 parts by weight of a brominated alkylphenol formaldehyde resin per 100 parts of the rubber material obtainable by blending butyl rubber and a halogenated butyl rubber at a weight ratio of 50/50 to 0/100. The composite flexible hose is completed by vulcanization after laminating each layer.

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