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Finely understand the factors that affect the wear resistance of sewing thread?
- Apr 17, 2018 -

The factors affecting the abrasion resistance of the sewing thread, in addition to the abrasive properties, have an important influence on the structure of the fibers, the sewing thread, and the abrasion test conditions. Wear-resistant sewing thread and textile fiber must have: low elastic modulus; large elastic deformation; creep deformation, slow elastic deformation to plastic deformation ratio value is large, slow elastic deformation of large absolute value; slow elastic deformation rate Big. The wear of the sewing thread can be considered to be caused by the fiber being subjected to very complex stresses (pulling, bending, twisting, shearing, rubbing), as well as being cut and the whole or partial threading of the fiber. Therefore, the structure of the sewing thread and the tightness of the fiber arrangement also have an effect on the wear.

The twist of the core spun yarn is an important part of the yarn structure of the sewing thread. Yarn twist of the core thread has an important influence on the strength and elongation of the sewing thread.

When the number of turns increases, the pressure of the fiber on the yarn axis increases, the frictional resistance between fibers increases, and it is not easy to slip off. This is a positive aspect of the strength of the short fiber yarn. However, as the number of turns increases, the inclination of the fibers increases. When the twist is small, the slip factor plays a major role, so as the twist increases, the strength of the short fiber increases. When the twist is large enough, the negative effect of the tilt plays a dominant role. As the twist increases, the strength of the short fiber yarn decreases. Therefore, the relationship between the spun yarn and the twist is similar to the parabolic law, and the twist factor is called the critical twist factor when it corresponds to the highest strength. The critical twist coefficient is related to the fiber properties. The fiber length is long and the fineness is fine. When the surface friction coefficient is large, the critical twist coefficient moves in the direction of low twist.

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