Refregerant transporting hose

Claim 1

A refrigerant transporting hose comprising: an inner tube; an outer tube of a rubber material located radially outwardly of said inner tube, said outer tube having a thickness of 1 to 2.5 mm; and a reinforcing fiber layer interposed between said inner and outer tubes, such that said reinforcing fiber layer is adhesively bonded to the inner and outer tubes to constitute an integral tubular body, said inner tube including a resinous layer formed of a blend of modified polyolefin and polyamide resin, said modified polyolefin being selected from the group consisting of (i) a copolymer of olefin monomer and comonomer selected from ethylenically unsaturated carboxylic acid and its derivative, (ii) graft copolymer of polyolefin and graft monomer selected from ethylenically unsaturated carboxylic acid and its derivative, and (iii) reaction product of polyolefin and reaction agent selected from carboxylic acid and its derivative, said copolymer, graft copolymer or reaction product having 0.1 to 20% by mole of said comonomer, graft monomer or reaction agent, respectively, a ratio by weight of said modified polyolefin to said polyamide resin being within a range of 30/70 to 70/30 , said resinous layer having a thickness of 0.1 to 2.5 mm, said inner tube further including an innermost layer of a rubber material located radially inwardly of said resinous layer, said innermost layer and said resinous layer being adhesively bonded to each other, said innermost layer having a thickness of 0.3 to 1 mm.