Refrigerant transporting hose and polyamide resin composition for forming gas barrier layer of the same

摘要

A durable refrigerant transporting hose is provided which includes a gas barrier layer made of a polyamide resin composition, and prevented from being degraded by the refrigerant or compressor oil. A refrigerant transporting hose 1 including a gas barrier layer 2 made of a polyamide resin composition. The polyamide resin composition contains at least one metal compound selected from the group consisting of hydroxides, oxides and carbonates of divalent and trivalent metals in an amount of 1% to 15% by weight relative to the total amount of the metal compound and the polymer component. An olefin elastomer may be added to the polyamide resin composition to enhance the flexibility and durability.

主权项

1. A refrigerant transporting hose comprising a gas barrier layer made of a polyamide resin composition,
wherein the polyamide resin composition contains at least one metal compound selected from the group consisting of hydroxides, oxides and carbonates of divalent and trivalent metals in an amount of 1% to 15% by weight relative to the total amount of the metal compound and the polymer component, wherein the polyamide resin composition contains a polyolefin elastomer, and at least part of the polyolefin elastomer is modified with an acid, wherein the refrigerant transporting hose includes an inner resin layer having a three-layer structure including, from the inner side, an acid-modified fluororesin layer, the polyamide resin layer and a polyamide/polyolefin elastomer composite resin layer.