| 摘要 |
PURPOSE:To enable the use of a core made of a lead alloy containing no antimony, by providing a woven tube made of yarns oriented differently from the core. CONSTITUTION:A tube is made of woven yarns 1 and 2 oriented differently from a core. The yarns 1 and 2 are produced by spinning an acid-resisting and anti-oxidizing fiberglass or plastic fibers of polyester, acrylic resin or the like. The tube may include an elastic yarn 3 oriented alike to the core. In that case, the yarn 3 is produced by spinning fibers of an elastic material. When the core is elongated, the angle of crossing of the yarns 1 and 2 of the tube is changed so that the tube itself can be elongated. Since the yarn 3 oriented alike to the core is elastic, the yarn 3 can be elongated along with the elongation of the core. |
