In order to make the yarn have certain physical and mechanical properties such as strength, elasticity, elongation, luster, and hand feel, the cotton yarn must be changed through twisting. The fiber structure is used to realize the yarn twisting. In fact, it is to use the cross-section of the cotton yarn to produce yarn. The relative angular displacement causes the originally straight and parallel fibers and the yarn axis to tilt to change the yarn structure. During the twisting process, the thick strip gradually shrinks in width, and the two sides gradually fold and are rolled into the center of the yarn line, forming a twisted triangle. , in the twisted triangle, the width and cross-section of the sliver change, from a flat ribbon to a cylindrical yarn.
(1) Definition of twist: A 360-degree rotation of the yarn around its axis is a twist.
(2) Definition of twist: The number of twists of the yarn within a specified length before untwisting, usually expressed as the number of twists per inch (T.P.I) or the number of twists per meter (T.P.M).
(3) Definition of twist coefficient: It is a measure of the degree of twisting of yarn, based on twists per unit length. T. M: Calculated by multiplying the number by the square root of the yarn density. T.M = T.P.I / square root of yarn count T.P.I = T.M x square root of yarn count
(4) Twist direction definition: When the yarn is in a vertical position, the tilt direction of the spiral formed by the rotation of the units making up the yarn around the axis of the yarn.
(5) S twist definition: The inclination direction of the fiber in the yarn is consistent with the middle of the letter S. It is a right-hand or clockwise twisted yarn.
Strongly twisted yarn is mainly used in woven weft yarns to create a unique wrinkled style on the fabric.
Due to the above unique functions, highly twisted yarn as a special yarn has always occupied a place in the yarn market. Strongly twisted yarn can be produced without improving equipment or adding accessories, and the product has high technical content and added value. However, the production of strongly twisted yarn is difficult and the product quality is difficult to control. Production companies must have certain technical capabilities and management experience.
Strongly twisted yarn is a very common fabric that is made into a variety of different garments and used for other purposes in daily life. However, not many people know the characteristics of this fabric. In order to help people understand it better, here is a brief introduction to this issue. I hope it can be helpful to those in need.
Strongly twisted yarn has good dimensional stability and small washing shrinkage. Simply put, clothing or other textiles made of this fabric do not need to worry about shrinkage after cleaning.
Strongly twisted yarn has good luster, is very beautiful, and feels very smooth and comfortable. It’s great for making underwear and won’t harm your skin.
In addition, the strongly twisted yarn has a unique silk-like feel, and is elegant and has good verticality. In addition to these characteristics, Tencel bamboo cotton fabric also has good air permeability and moisture resistance. When textiles made from it are worn in summer, people do not need to worry about its breathability and moisture resistance.
The comprehensive performance of strong twisted yarn fully meets the requirements of modern people, and it contains a large amount of cotton and uses plant fibers, so it does not cause any harm to the human body. It has strong plasticity, so it can be made into a variety of clothes. It is also very comfortable to wear, has a soft hand feel, and a very strong drape. It has no smell after burning, so it is a healthy and green textile. .
The commonly used twist coefficient is higher for woven warp yarns, while knitting warp yarns are generally lower, about 3.5-3.6. Due to different uses of yarn, there are different twist coefficient yarn products. According to Japanese textile calculation data, they are divided into: ordinary twist = 4.0 (twist coefficient), loose twist = 3.4 (twist coefficient), special loose twist = 1.32- 2.8 (twist coefficient), strong twist=5.0-5.4 (twist coefficient), special strong twist=5.0-6.5 (twist coefficient). High-twist yarn generally needs to go through a steaming process before it can be woven. Sometimes it is necessary to install a twist remover before it can be woven.
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