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Sewing thread twist <br> The sewing thread is twisted and twisted one turn for a roundabout. The number of twists in the unit length of the sewing thread is called the twist. China's cotton yarns are made with special twist, which is expressed by the number of twists in the length of 10 cm yarn; combed wool and chemical filaments are measured by the metric count, that is, the number of twists per meter; There is also an inch count system in terms of the number of turns per inch.
Sewing thread twist coefficient <br> Sewing thread twist can not be used to compare the twisting degree of different thickness yarns, because the same twist, the thick yarn has a more inclined fiber than the thin yarn. In actual production, the æ» coefficient is often used to indicate the degree of twisting of the sewing thread. The æ» coefficient is a relative value indicating the degree of twisting of the yarn in combination with the linear density, and can be used to compare the twisting degree of the yarn of different thickness sewing threads. The twist factor can be calculated from the twist of the sewing thread and the linear density of the sewing thread.
Sewing thread < <br> Sewing thread ç¼çº« The sewing thread æ» direction refers to the oblique direction of the single yarn in the fiber or strand in the single yarn after the sewing thread is twisted. It is divided into two types: Zæ» and Sæ». After twisting, the twist direction of the yarn tends from the lower right corner to the upper left corner, and the oblique direction is the same as the middle of the "S", which is called Sæ» or smooth hand. The twist of the sewing thread tends from the lower left corner to the upper right corner, and the oblique direction Consistent with the middle of the "Z", it is called Zæ» or backhand. Generally, single yarns are usually Z æ», and strands are S æ».
The twisting direction of the sewing thread strands is expressed in the direction of the twisted ones. For example, a single yarn is a Z æ», a primary æ» is S æ», and a æ» is a Z æ» strand, and its æ» is represented by ZSZ.
The twisting direction of the sewing thread yarn greatly affects the appearance and feel of the fabric, and the warp and weft yarns are combined with the fabric structure to weave a fabric having different appearances and feels.
Sewing thread twisting <br> The sewing thread twisting causes the two sections of the sliver to rotate relative to each other, and the fibers originally parallel to the yarn axis in the sliver are inclined into a spiral. For short fibers, twisting is mainly to increase the strength of the sewing thread. The twisting of the filaments can both increase the strength of the yarn of the sewing thread and produce an effect. The amount of twisting of the sewing thread and the twisting and twisting of the sewing thread in the fabric have a great influence on the appearance and performance of the product.
November 11, 2022