Importance

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Abstract

To provide a hose for transporting a refrigerant, a butyl rubber layer 7 is formed on outer periphery of a tubular resin layer 1, which is in contact with a refrigerant, and an ethylene-propylene rubber layer 8 is further formed on the outer periphery thereof. The resin layer 1 is composed of a material that contains, as a main component, a mixture of a polyamide resin and a modified polyolefin elastomer, a skin layer 6 is formed only on an inner peripheral surface of the resin layer, and tensile modulus (A) of the skin layer 6, tensile modulus (B) of the resin layer 1 excluding the skin layer 6, tensile modulus (C) of the butyl rubber layer 7, and tensile modulus (D) of the ethylene-propylene rubber layer 8 satisfy the relationship that is defined by the following formula (α):

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First Claim