| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hose which has flexibility offering superior handleability and constructibility, and improved durability. <P>SOLUTION: The hose includes an innermost tube composed of three or more layers at least including an innermost layer, a second inner layer adjacent to the innermost layer, and an outer layer disposed outside the second inner layer. The innermost layer and the second inner layer are both made of a polyolefin-based resin, and the outer layer is made of a thermoplastic elastomer. The innermost layer, whose hardness is 45D to 70D, is harder than the second inner layer, whose hardness is 65A to 44D. The total of thicknesses of the innermost layer and second inner layer is 1.1 to 2.0 mm. Both innermost layer and second inner layer are molded by co-extrusion, and are bridged by electron beam exposure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
