| 摘要 |
<p>To provide a double carcass-type marine hose with greatly improved shock absorption performance of the outer side carcass layer group, with reduced weight and lower cost. Nylon 66 cords with a ply structure are used as carcass cords 9b of the outer side carcass layer group 9, which is configured by laminating carcass layers 9a, the breaking elongation of these nylon 66 cords is not less than 30% and the strength thereof is not less than 5.9 cN/dtex, and the upper twist coefficient K calculated from K = T×D 1/2 is set to not less than 1000 and not more than 3100, where the cord fineness is D (dtex) and the upper twist count is T (No./10 cm), and the shock produced when the inner side carcass layer group is damaged is absorbed by the outer side carcass layer group 9.</p> |
