| 摘要 |
Disclosed is a thin and light webbing having a high strength per warp yarn unit, maintaining abrasion resistance, and using, as a warp yarn, a very strong polyester multifilament yarn for a seat belt made by fine single-yarn fibers. A yarn obtained by performing a twisting process of a high degree of twist which is not common for a conventional seat belt by a novel twisting method of a very low cost on a polyester multifilament yarn made of fine single-yarn fibers so as to be highly bound unlike the conventional method is used as a warp yarn. The polyester multifilament yarn of fine single-fibers is essential to be woven at the maximum stretch ratio in a yarn making process to obtain a novel very-strong polyester fiber for a seat belt. A multifilament yarn and/or a monofilament yarn of polyester is/are used as weft yarns. By making the weft yarns and warp yarns cross each other so as to be woven in a belt like configuration, a webbing having a very high strength per unit of warp yarns, using low-cost base yarns, and maintaining abrasion resistance is obtained.
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