Several common new spinning techniques for improving hairiness
1. COMPACT YARN
It is a new concept and new technology of spinning. It is mainly improved on the spinning frame. The drafting system is different from the traditional spinning frame. After the roller is output, a set of fiber gathering device is added to effectively pass the two drafts. The roving slivers converge before entering the twisting zone. A stream of air is used to pull the sliver from the clamping point of the roller drafting system and gather it on a porous surface. The sliver is compressed due to suction and the jaws are reduced At the roving width, the height of the spinning triangle is greatly reduced, the twisting effect of the cotton yarn is increased, and the cotton fiber is more ordered and tighter, which greatly reduces the number of cotton yarn hairiness.
2. Sirospun spins and twists
Mainland China is called A and B yarns, and recently officially named Siro Spinning. It is to feed two rovings with a certain distance on the spinning frame. After drawing, the two single yarn whiskers are output from the front roller, and the single yarn whiskers have a small amount of twist due to the transmission of twist. Afterwards, it is further twisted into a ply-like yarn and wound on the bobbin. The original design purpose of Siro spinning is for wool spinning. The yarn exists: less hairiness, high strength and good wear resistance. To achieve the effect that wool yarn can be woven by a single yarn to achieve the thinning of wool fabrics, although Siro spinning has been greatly improved in many aspects compared to similar conventional yarns, there is still a certain distance to achieve the single woven of wool yarn without sizing After that, wool spinning also gave up this method, but it was used in blending such as T / C, CVC, etc. Because it can produce the twist effect of the yarn after dyeing, it has a good feel, so it is popular. Recently, it has improved the problem of hairiness , Such as spinning some fibers that are prone to hairiness, such as artificial cotton, modal, tencel, soybean fiber, and even cotton are produced by this method, the raw material grade of Siro yarn can be lower than that of conventional ring spinning, and its fabric is more conventional The ring strand yarn fabric has less hairiness, soft hand feeling, wear resistance and good air permeability.
Similar to Siro spinning, it also changes on the basis of Siro spinning, the difference is that a roving is changed to a fine denier filament, and another roving (wool, cotton or hemp, silk, etc.) A filament feeding device is added to the ring spinning machine, so that the filaments and the normally drawn whiskers are fed at a certain distance and fed equally, and they merge at the downstream of the front roller jaws and twist into yarn. Due to the use of various chemical fiber filaments and spun yarns, two-component raw materials are twisted, so it is also known as two-component spinning or composite yarn. Sirofi spinning fabrics have elasticity, wrinkle resistance, drape, good breathability, and anti-pilling. The fabric has good dimensional stability and many product changes.
4, Solo spinning (Solospun)
Also known as cable spinning, a new technology introduced by the International Wool Bureau is to add a split roller with many grooves on the surface of the front roller. Its role is to use the groove to divide the flat whiskers output under the front jaws. Into many narrow strips, these narrow strips of fiber rotate around their own twisting center due to twist transmission, with a small amount of twist, and then move down with the yarn winding movement, and then are gathered and twisted to form a similar multi-strand yarn The twisted cable yarn is called cable spinning. Compared with Siro yarn made by twisting only two weakly twisted strands, this kind of yarn twisted by multiple weakly twisted strands has higher strength, better wear resistance and more Fewer hairiness is most suitable for pure wool or blended yarn. In fact, the single yarn of Solo yarn can be woven directly into cloth without sizing.
This spinning method is based on compact spinning and is equipped with the characteristics of Siro spinning. That is, two rovings with a certain distance are fed on the compact spinning machine. The exposed hairy feathers are gathered on the porous surface, which is further twisted by the sliver being compressed by suction, and wound around the bobbin. The hairiness of the yarn is almost non-existent, and the strength is also higher. It is most suitable for mercerizing yarn, and can reduce the process of singeing and reduce the bottom cost.