| 摘要 |
PROBLEM TO BE SOLVED: To provide a core yarn sewing thread having stitch strength and stitch quality with slight thread breakage during sewing in high-speed sewability or automatic sewability and buttonhole sewability according to computer control when sewing is carried out with an industrial lock stitch sewing machine. SOLUTION: The core yarn sewing thread is obtained as follows. A two-layer structural yarn is formed by surrounding a sheath yarn composed of a staple fiber yarn parallel in the cylindrical form in the yarn longitudinal direction of a core yarn composed of a filament yarn. A plurality of zero-twist core yarns of a three-layer structure in which a binding part is composed by winding with a part of the staple fiber yarn of the sheath yarn on the outer layer thereof are doubled and final twist is then applied thereto. COPYRIGHT: (C)2005,JPO&NCIPI
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