What is strong twist yarn? What are the advantages of strong twist yarn?
In order to make the yarn have certain physical and mechanical properties such as strength, elasticity, elongation, luster, and feel, the cotton yarn must be changed by twisting, and the yarn twisting is realized by the fiber structure. The relative angular displacement makes the originally straight and parallel fibers incline with the yarn axis to change the yarn structure. During the twisting process, the thick sliver gradually shrinks from the width, and the two sides are gradually folded and rolled into the center of the yarn sliver, forming a twisting triangle. , in the twisting triangle, the width and cross-section of the sliver changes, from a flat ribbon to a cylindrical yarn.
(1) Definition of twist: A twist is a sliver that rotates 360 degrees around its axis.
(2) Definition of twist: the number of twists in the specified length of the sliver 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 the yarn, according to the twist 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) Definition of twist direction: when the sliver is in a vertical position, the inclination direction of the helix formed by the rotation of the units constituting the sliver around the axis of the sliver.
(5) Definition of S twist: The inclination direction of the fibers in the sliver is consistent with the middle of the letter S. It is a right-hand or clockwise twist yarn.
Strong twist yarn is mainly used on weaving weft yarn, which can make the fabric wrinkle unique style.
Due to the above unique functions, strong twisted yarns as special yarns have always had a place in the yarn market. Strong twist yarn can be produced without improving equipment and adding accessories, and the product has high technical content and added value. However, the production of strong twisted yarn is difficult, and the product quality is difficult to control. The production enterprise must have certain technical ability and management experience.
Strong twist yarn is a very common fabric, it is made into a variety of different garments and other uses in daily life. However, not many people know the characteristics of this fabric. In order to help people better understand, the following is a brief introduction to this problem, hoping to help those in need.
Strong twisted yarn has good dimensional stability and small shrinkage in washing. In short, clothing or other textiles made of this fabric do not need to worry about shrinking after washing.
Advantages of Strong Twist Yarn
The strong twist yarn has a good luster and is very beautiful, with a very smooth and comfortable hand. It's great for making underwear and doesn't harm the skin.
In addition, the strong twisted yarn has a unique touch like silk, and it has good vertical and elegant suspension. In addition to this feature, Tencel bamboo-cotton fabric also has good air permeability and wetness. When the textiles made of it are worn in summer, people do not need to worry about its air permeability and wetness.
Strong twisted yarn fully meets the requirements of modern people in terms of comprehensive performance, and its cotton content is relatively large, and it uses plant fibers, so it does not cause any harm to the human body. It has strong plasticity, so it can make a variety of clothes, it is very comfortable to wear, soft to the touch, drape is also very strong, and there is no smell after burning, so it belongs to a healthy and green textile .
Commonly used twist coefficient, woven warp yarn is higher, and knitting is generally lower, about 3.5-3.6. Due to the different uses of the yarn, there are yarn products with different twist coefficients. According to the calculation data of Japan Textile, 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), especially strong twist = 5.0-6.5 (twist coefficient). High-twist yarn generally needs to go through the steaming process before it can be woven, and sometimes it needs to be equipped with a twister to be woven.