| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerant transporting hose which avoids the formation of bubbles in an adhesive layer caused by the abrupt lowering of pressure in the hose during maintenance and the like, is excellent in interlayer adhesion properties and in flexibility and excellent in low permeability to a refrigerant. SOLUTION: The refrigerant transporting hose includes an innermost layer 1 containing as a principal component a polyamide resin, a low-permeability layer 2 formed on the outer periphery of the innermost layer 1 and formed of a polyvinyl alcohol, and a rubber layer (an inner rubber layer 3a and an outer rubber layer 3b) formed on the outer periphery of the low-permeability layer 2. The adhesive layer 5 is formed at an interface between the innermost layer 1 and the low-permeability layer 2. The adhesive layer is formed of a rubber cement adhesive containing as essential components: (A) a halogenated butyl rubber; (B) a phenolic resin; (C) carbon black; (D) silica; and (E) a resin vulcanizing agent. COPYRIGHT: (C)2009,JPO&INPIT
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