Yarn quality of different spinning types "big competition"

1, strong

The strength of the yarn depends on the cohesion and friction between the fibers. If the fiber morphology and its arrangement are not good, that is, there are bending, looping, folding, winding and other fibers exist, it is equivalent to shorten the length of the fiber, weakening the degree of contact with the fiber, which is easy to produce fiber slip, reduce Yarn strength.

According to tests, if the ring yarn strength is 1, the strength of other types of yarns is: 0.8-0.9 for rotor yarn, 0.6-0.7 for air-jet yarn, 0.8 for vortex yarn, and 1.15 for compact spinning strength.

2, hair feather

The feel and properties of textile products are largely determined by the hairiness. It can be clearly seen from the production test that hairinesses less than 2 mm in length have little effect on the production process and the appearance quality of the Fabric, but instead have a natural soft feel to the fabric. However, hairiness exceeding 3 mm in length is a potential factor affecting yarn quality. Compared to traditional ring yarns, the airflow yarns, vortex yarns, and compact yarns have a 1 to 2 mm hairiness, while the air-jet yarns have a low hairiness due to the low number of winding fibers. In the spinning process, the number of hairiness can be controlled by adjusting the process parameters.

Comparison of yarn counts for yarns of different spinning methods. Compared with conventional ring yarns, the number of harmful hairs (>3mm) is significantly reduced for non-traditional spinning, with compact yarns reduced by approximately 80%, air-jet yarns by approximately 85%, and vortex spinning by approximately 90%. The new yarns all have good post-processing characteristics. Because the new yarn structure makes the surface of the yarn more stable, the increase in hairiness after the processing is significantly lower than that of the conventional yarn. In particular, as warp yarns, about 50% of the slurry can be saved during sizing, greatly increasing the efficiency of the loom and reducing the weaving cost. According to information, the cost of weaving per new 100m cloth in the United States can be reduced by US$2.4, and flyout by 72%.

3, wear resistance

The abrasion resistance of the yarn is closely related to the structure of the yarn.

Traditional ring-spun yarns are mostly in the form of a helix due to the fact that when the friction is repeated, the helix fibers gradually become axial fibers, and the yarns are easily disintegrated and quickly worn off, resulting in poor wear resistance.

Non-traditional spinning has obvious advantages in terms of wear resistance. Rotor, air-jet and vortex yarns are composed of a yarn core and an outer wrapping fiber. The surface of the yarn is wrapped with irregular winding fibers and the yarn is not easily disintegrated. At the same time, the friction coefficient of the surface of the yarn is large, and the cohesion between the yarn and the yarn in the fabric is good and the relative slippage is not easily generated, so the wear resistance is improved.

Compared with ring-spun yarns, the fibers of compact spinning are arranged neatly, the yarn structure is tight, and the fibers are not easily dissipated, so the abrasion resistance of the yarn is good.

4, the trend

Deterrence is also an important characteristic of yarns and determines some characteristics of fabrics, such as the oblique path of knitted fabrics.

Conventional ring yarns and compact yarns are true-twisted yarns. They have a large tendency to produce slanting and hemming of knitted fabrics. Sometimes, they need to be compensated by the combination of threads.

The yarn forming structure of rotor yarn, air-jet yarn and vortex yarn determines its tendency to be small. The rotor yarns z and s are present at the same time, so the tendency is the lowest. Due to the high proportion of parallel fibers in the air-jet yarns, the draw-back force is small and also has good post-processing characteristics.

5, anti-pilling

Vortex knitted fabrics have good abrasion resistance and high pilling resistance. This is because the middle of the vortex yarn is a straight core yarn, and the outer layer is covered with winding fibers, the fiber orientation is obvious, the coefficient of friction of the yarn is large, the friction between the yarn and the yarn in the fabric is good, relative slip is not easy to occur, and the wear resistance is improved. In addition, pilling is also closely related to the condition of yarn hairiness. Through the test of pilling tests, we can see: vortex yarn fabrics 4 to 4.5, air-jet yarn 4, traditional ring yarn 2, rotary cup yarn 2 to 3, compact spinning 3 to 4.

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