| 摘要 |
PURPOSE:To obtain a multi-layer tube for vehicles, which is light in weight and high in resistance to puncture, by laminating resin whose strength is high and is of gas barrier properties on the inside of the tube. CONSTITUTION:High-strength and gas-barrier-property resin 3 having a thickness of 1-30% of that of elastomer 2, an F-5 value (tensile strength at the time of 5% of elongation) which is higher than that of the elastomer 2 and gas barrier properties is laminated on the inside of thermoplastic polyurethane elastomer 2 of a multi-layer tube 1. In other words, the resin 3 is composed of a resin selected out of polyvinylidene chloride resin, polyester resin, polyamide resin, vinylethylene alcohol copolymer resin, acrylic denatured fluorine resin, acrylic resin and polycarbonate resin or combination of more than one kind of them. This tube does not deteriorate elasticity and possesses excellent pressure-resistance strength and air holding properties. |
