Refrigerant transporting hose

A refrigerant transporting hose comprising:

• an inner tube for transporting a refrigerant, said inner tube including an inner and an outer rubber layer and an intermediate resinous layer interposed between said inner and outer rubber layers, said intermediate resinous layer resisting permeation of refrigerant therethrough, said inner rubber layer having a thickness of 0.05 to 1 mm, said intermediate resin layer having a thickness of 0.05 to 0.5 mm, said outer rubber layer having a thickness of 1 to 3 mm, said intermediate resinous layer being adhesively bonded to said inner and outer rubber layers;
• 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 tube and said outer tube, said reinforcing fiber layer being adhesively bonded to the inner and outer tubes to constitute an integral tubular body,
• said inner rubber layer of the inner tube being formed of a rubber material selected from the group consisting of acrylonitrile-butadiene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, chloroprene rubber, chlorinated isobutylene-isoprene rubber and ethylene propylene diene rubber,
• said intermediate resinous layer of the inner tube being formed of a resinous material selected from the group consisting of polyamide resin, saponified ethylene-vinyl acetate copolymer and a blend of polyamide resin and rubber material,
• said outer rubber layer of the inner tube being formed of a rubber material selected from the group consisting of acrylonitrile-butadiene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, chloroprene rubber, chlorinated isobutylene-isoprene rubber and ethylene propylene diene rubber,
• said inner rubber layer having a resistance to water permeation as high as, or higher than, a resistance to water permeation of said outer rubber layer,
• said intermediate resinous layer having a resistance to water permeation lower than the resistance to water permeation of each of said inner and outer rubber layers.