| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hose for cooling carbon dioxide gas, which has constant low permeability corresponding to the temperature of carbon dioxide gas, and prevents deterioration of a cooling performance. SOLUTION: This hose for cooling carbon dioxide gas comprises an inner pipe 1, which is made of polyamide resin having lower permeability to carbon dioxide gas that flows in a pipe; a plurality of barrier layers 2, which are installed around the inner pipe 1 and are obtained by spirally winding barrier tapes 20 that are composed of a laminar element of a metallic foil and a resin film; a resin reinforced layer 3, which is installed around the barrier layer 2; and an outer pipe 4, which is coated around the resin reinforced layer 3 and made of a thermoplastic elastomer (TPE). The number of barrier layers 2 corresponding to the temperature of carbon dioxide gas are installed, so that the hose has constant low permeability corresponding to the temperature of carbon dioxide gas. The inner pipe 1 is formed of resin having low permeability to carbon dioxide gas, so as to prevent a fluid path from being narrowed due to retention of carbon dioxide in the barrier layer 2.</p> |
