Clothing material knowledge - characteristics of different yarns

The feel and characteristics of textile products are mainly determined by the number of hairiness. It can be clearly seen from the production test that hairiness less than 2mm in length has little impact on the production process and the appearance quality of the fabric. On the contrary, it will make the fabric have a natural soft feel. However, hairiness over 3mm in length is a potential factor affecting yarn quality.

Different twisting processes produce different yarn structures and product characteristics.

1, strong

Yarn strength depends on the holding force and friction between the fibers. If the fiber form and arrangement state is not good, that is, there are bending, circling, folding, winding and other fibers exist, which is equivalent to reducing the fiber length, weakening the fiber contact degree, thus easy to produce slip between fibers, reduce the yarn strength.

According to the test, if the strength of ring spun yarn is 1, then the strength of other types of yarn is 0.8 ~ 0.9, 0.6 ~ 0.7, 0.8 and 1.15 respectively.

2, hairiness,

The feel and characteristics of textile products are mainly determined by the number of hairiness. It can be clearly seen from the production test that hairiness less than 2mm in length has little impact on the production process and the appearance quality of the fabric. On the contrary, it will make the fabric have a natural soft feel. However, hairiness over 3mm in length is a potential factor affecting yarn quality. Compared with traditional ring spinning yarns, the hairiness of airflow yarns, vortex yarns and compact yarns is reduced by 1 ~ 2mm, while air-jet yarns have more short hairiness due to the low number of winding fibers and less coverage of non-twist core. Of course, the number of hairiness can be controlled by adjusting technological parameters in the spinning process.

Is the comparison of yarn hairiness of different spinning methods. Compared with traditional ring spun yarns, the harmful hairiness (>3mm) of non-traditional spinning yarns is significantly reduced, including 80% reduction of compact yarns, 85% reduction of air-jet yarns, and 90% reduction of eddy current yarns. Therefore, the new yarns have good post-processing characteristics. As the new yarn structure makes the yarn surface more stable, the hairiness increase after processing is significantly lower than that of traditional yarns. Especially as warp yarns, sizing can save sizing material by 50%, greatly improve loom efficiency and reduce weaving cost. According to some data, in the United States, the weaving cost of the new type of yarn can be reduced by $2.40 per 100m cloth, and the flying flower can be reduced by 72%.

3. Wear resistance

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

Because most of the traditional ring spinning fibers are helical, when repeated friction, the helical fibers gradually become axial fibers, and the yarn is easy to lose twist and break up quickly, so the wear resistance is poor.

Non-traditional spinning has obvious advantage in resistance to wear, rotor yarn, jet yarn and vortex yarn consists of two parts, outsourcing core yarn and fiber, yarn surface with irregular wrapping fibre, yarn is not easy to collapse, at the same time, the yarn surface friction coefficient is big, between the yarn in the fabric and yarn as well is good, not easy to produce relative sliding, so the wear resistance improved.

Compared with ring spun yarns, the fibers of compact spinning are arranged neatly and straight, and the yarns have a tight structure, which is not easy to break off. Therefore, the yarns have good wear resistance.

4, twist

Twist is also an important characteristic of yarn and determines some of the characteristics of the fabric, such as the inclination of the knitted fabric.

Traditional ring and compact yarns are true twist yarns, which have a high twist potential and tend to produce the warp and hem of knitted fabrics.

The low twist potential is determined by the yarn structure of rotary cup yarn, air-jet yarn and eddy current yarn. There are both Z twist and S twist in rotary cup yarn, so the twist potential is the lowest.

5. Fight puck

Eddy-yarn knitted fabric has good wear resistance and high pilling resistance. This is because the center of the vortex yarn is flat core yarn, outer coating winding fiber, fiber orientation is obvious, the friction coefficient of the yarn is large, the friction between the inner yarn and the yarn is good, not easy to produce relative slip, wear resistance is improved, in addition, pilling and yarn hairiness is closely related. It can be seen from the pilling test that: 4 ~ 4.5 grades of vortex yarn, 4 grades of air-jet yarn, 2 grades of traditional ring spinning yarn, 2 ~ 3 grades of rotary cup yarn and 3 ~ 4 grades of compact spinning yarn.