Ring spinning schematic
2 Compact spinning ( Compact)
Compact spinning is a new spinning technology that is spun on an improved new ring spinning machine. The spinning mechanism is mainly as follows: a fiber cohesion area is added in front of the traction device of the ring spinning machine, which basically eliminates the spinning twisting triangle area between the front roller and the twisting point. After the fiber slivers are output from the front opening of the front roller, they first pass through the mesh apron coated by the special-shaped suction duct. The slivers move on the mesh apron. Due to the contraction and polymerization of the air flow, the slivers are gathered through the suction groove of the special-shaped tube. It rotates and gradually changes from a flat ribbon to a cylinder. The ends of the fibers are all twisted into the yarn, so the yarn is very tight and the yarn has a smooth appearance and less hairiness. Compactly spun yarns have higher strength and less hairiness. It is least likely to cause fraying during the weaving process.
Comparison between traditional ring spinning and compact spinning
The purpose of compact spinning is to make the fibers as parallel and close as possible before twisting the yarn. This is an important criterion for high-quality compact spinning yarns. Making the fibers as parallel and consistent as possible before twisting is a prerequisite for its advantage.
The advantages of compact spinning are: the yarn has very little hairiness, especially hairiness above 3mm. It also improves the efficiency of the subsequent loom and the smoothness of the cloth surface; The cohesion between the yarns is large and the strength is high; the evenness is uneven, and the thickness and detail indicators are better than traditional yarns. However, the cost of compact spinning equipment is high, which increases the equipment investment of spinning mills. In addition to the great improvement in hairiness indicators, other indicators of yarn such as evenness, thickness, and details have not improved much.
Sirospun is also known as twisted spinning, domestic It was called A/B yarn, and later officially named Siro spinning.
Siro spinning uses double rovings to be fed into the spinning frame. Two parallel roving slivers maintained at a certain distance are drafted by rollers in the spinning drafting area. The jaws first form two small triangles, and then they are brought together and twisted into a yarn strip. Due to the transfer effect of twist, a small amount of twist has been added to a single strand before twisting. Therefore, the twisted yarn has a different strand style from ordinary single yarn. If color-spun roving is used as feed, pattern-like “AB” blended yarn can be spun.
Illustration of Siro spinning yarn
Siro spinning was originally designed to be used in wool spinning and is characterized by less hairiness. , high strength and good wear resistance, achieving the effect that wool yarn can be woven with single yarn, so as to achieve the lightness and thinness of wool fabric. Although siro spinning has made great improvements compared to similar conventional yarns in many aspects, there is still a certain distance to truly achieve weaving of woolen single yarn without sizing. Later, wool spinning mostly abandoned this method, and instead used this method in blended fabrics such as T/C, C.V.C, etc. It is popular because it can produce a twist effect of doubling yarns after dyeing and has a good hand feel.
Recently, in order to improve the problem of hairiness, such as spinning some fibers that are prone to hairiness, such as viscose staple fiber, modal, Tencel®, etc., even cotton is used. Produced by this method, the raw material grade used in siro yarn can be lower than that of conventional ring-spun yarn, while its fabric has less hairiness than conventional ring-spun yarn fabric, has a soft hand feel, is wear-resistant, and has good breathability.
Sirofil is a Developed on the basis of winding spinning, serofil spinning feeds a filament and a short fiber roving separately, and maintains a fixed distance from the holding point of the front traction roller. They form a triangle area. Twisted to form a serofil composite yarn. The filament is fed directly from the back side of the front roller nip without drafting, and is twisted with the roving strips behind the front roller to form a yarn.
<img data-preview-src="" data-preview-group="1" src="http://pic.168tex.com/Upload/News/image /20��Siro yarn with double-strand structure characteristics.
Siro spinning’s simultaneous twisting in the same direction gives the yarn a special structure. The fibers on the surface of Siro spinning are neatly arranged, the yarn has a tight structure, less hairiness, and is resistant to fluffing. Pilling is good. Compared with stranded fabrics, Siro fabrics have a softer feel and are smoother. Siro spinning can be used for woven fabrics and knitted fabrics, and can also replace strands for high-count and high-density fabrics.
b. Compact spinning technology is a new type of ring spinning technology based on traditional ring spinning. Simply put, it is a spinning technology that densifies the fibers output by the spinning machine after drafting. That is, by adding an air suction device before twisting the sliver, and through the control of negative pressure, the loose fibers are gathered and cohesive, and the fibers are controlled The area is fully straightened and the twisting triangle area on the traditional spinning machine is reduced, so that the fibers can be twisted in a parallel and tight state.
Because each fiber in the sliver is evenly stressed and tightly coupled, the yarn structure and quality are comprehensively improved, including hairiness, strength, evenness, wear resistance, and yarn appearance. There has been a significant improvement.
c. Compact Siro spinning is a combined process spinning method that combines compact spinning and Siro spinning. The yarn spun by this technology combines two The excellent characteristics and quality of the spinning method. Compared with traditional ring-spun single yarn and siro yarn, compact siro yarn has less hairiness, higher strength, and has the plying effect of siro spinning. It is the best choice for spinning high-end fabrics. Ideal raw material with good development prospects. </p