There is an optimal ratio of single yarn to strand, in this range, the strand strength increases with the increase of strand, and decreases when the critical value is exceeded. The properties of the fibers and the spinning method play a decisive role in the performance of the yarn. In the process of twisting, due to the transfer of fibers, from the inner layer of the yarn to the outer layer, and then from the outer layer to the inner layer, repeated transfer for many times, the fiber around the axis of the yarn is spiral-shaped, and the spiral radius alternately increases or decreases along the axial direction. At this time, fibers with long lengths tend more to the axis of the yarn, and fibers with short lengths tend more to the outer layer of the yarn. Fineness fibers tend to the axis of the yarn, and fineness fibers tend to the outer layer of the yarn. Fibers with a small initial modulus are more located in the outer layer, and fibers with a large initial modulus are more located in the inner layer. Reasonable selection of fibers with different properties can be spun into different styles of yarn, adapt to different fabric uses or improve performance. Since the length, fineness and cross-sectional shape of the fiber can be arbitrarily selected, the outer fabric should use chemical fiber and cotton blending with slightly thicker and shorter fiber to increase the wool shape of the yarn surface. Underwear fabrics should use chemical fibers with slightly finer fibers and slightly longer lengths, so that cotton fibers are in the outer layer of the yarn to improve moisture absorption and wearing comfort. Free end spinning includes airflow spinning, electrospinning, vortex spinning, etc. spinning yarn, because the fiber transfer is less inward when twisting, the yarn core is tight and loose outside, the structure is looser, the fiber straightness is poor, the holding force between the fibers is poor, the yarn strength is low, but the dyeability and wear resistance are good. The yarn spun by self-twisting spinning, also known as self-twisting yarn, is the use of rolling rollers to produce periodic positive and reverse false degree of whiskers, and there is a periodic no point on the yarn, so the strength is low, and it is generally woven after the strands are formed.
This is a commonly used yarn untwister on the circular machine, also called untwister, twister reducer, this is a twister with an extended rod, generally suitable for yarn cylinders with an inner diameter of 58MM.
In addition, we have other accessories such as Circular machine oiler, Control Panel, Adjustable Yarn Bobbin Cover, Synchronous Belt, Needle Cylinder and so on.
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