Sewing thread and process for producing the same
AssigneeToray Industries, Inc.
InventorsHaruki Kitamura, Toshihiko Kimura, Kazuo Umeda, Yoshikazu Tsuji, Naoki Yamaga, Akihiro Maekawa
Life of this patent
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Abstract
To provide a sewing thread that is excellent in high-speed sewability and automatic sewing characteristics. A sewing thread includes a plurality of under-twisted yarns provided with upper-twist, the yarns each being composed of a sheath-core structure yarn composed of two or more multifilament yarns, wherein part of the sheath-core structure yarn protrudes as loops on a yarn surface, the loops being composed of 50 to 300 loops/m with 0.7 to less than 1.2 mm length and 10 or less loops/m with 1.2 mm or more length, and wherein the yarns have a strength of 4 to 6 CN/dtex.
Claims11
A sewing thread comprising a plurality of under-twisted yarns, each of the under-twisted yarns being a sheath-core structure yarn composed of a sheath yarn comprising sheath filaments and a core yarn comprising core filaments, the sewing thread having an upper-twist therein,
- wherein a part of the sheath-core structure yarn protrudes as loops on a surface of the sewing thread, the loops with 0.7 to less than 1.2 mm length are 50 to 300 loops per meter, and the loops with 1.2 mm or more length are 10 or less loops per meter.
Dependencies are inferred from the claim text.