Knowledge Of Clothing Materials -- Characteristics Of Different Yarns

Different yarn twisting processes produce different yarn structures and produce different product characteristics.

　　 1 strength

　　 yarn Strength depends on the cohesion and friction between fibers. If the fiber morphology and its arrangement are bad, such as bending, beating, folding, winding and other fibers, it is equivalent to shortening the length of the fiber and weakening the contact degree of the fibers, resulting in the slipping of fibers and the reduction of yarn strength.

The test shows that if the strength of ring yarn is 1, the strength of other kinds of yarns is 0.8 to 0.9 of rotor yarn, 0.6 to 0.7 of air-jet yarn, 0.8 of vortex yarn, and the highest strength of compact spinning is 1.15.

　　 2 hairiness

Textile products Feel And characteristics are mainly caused by hairiness How many decisions. From the production test, it can be clearly seen that the hairiness less than 2mm has little effect on the production process and the appearance quality of the fabric, but on the contrary, the fabric has a natural soft feel. However, the hairiness over 3mm is a potential factor affecting yarn quality. Compared with traditional ring yarns, the 1 to 2mm Mao Yu of airflow yarn, vortex yarn and compact yarn have been reduced. However, because of the low number of filament winding and the less twisting core, the air-jet yarn has more short hairs. Of course, in the spinning process, the number of Mao Yu can be controlled by adjusting the technological parameters.

Comparison of yarn hairiness for different spinning methods. Compared with traditional ring yarns, the number of harmful hairiness (>3mm) of non-traditional spinning decreased significantly, of which the compact yarn was reduced by 80%, the air-jet yarn was reduced by 85%, and the vortex spinning decreased by more than 90%, so the new yarn had good post-processing characteristics. Because the new yarn structure makes the surface of the yarn more stable, the increase of post processing hairiness is significantly lower than that of the traditional yarn. Especially when used as warp yarn, it can save about 50% of the size when sizing, greatly improve the loom efficiency and reduce the weaving cost. Data show that in the United States, the use of new yarn per 100m cloth can result in a reduction of 2.4 US dollars and a 72% decrease in flying flowers.

　　 3 wear resistance

Yarn Wear resistance It is closely related to the structure of yarns.

Because the fibers of traditional ring yarns are mostly spiral, when the friction is repeated, the helix fibers gradually become axial fibers, and the yarns are easily twisted and disintegrated quickly, so the wear resistance is poor.

Non conventional spinning has obvious advantages in wear resistance. Rotor spun yarn, air-jet yarn and vortex yarn are made up of two parts: yarn core and outer fiber. Irregular yarn is wrapped on the yarn, yarn is not easy to disintegrate, and the yarn surface friction coefficient is large. The yarn and yarn in the fabric are well connected, and it is not easy to produce relative slip, so the wear resistance is improved.

Compared with the ring yarns, the fibers of compact spinning are arranged orderly and straight, the yarn structure is compact, and the fibers are not easily dispersed, so the yarn has good wear resistance.

　　 4 twist potential

　　 Twisting potential It is also an important characteristic of yarn, and determines some characteristics of fabric, such as the oblique way of knitted fabric.

Traditional ring yarns and compact yarns are really twisted yarn. They have large twisting and easy to produce oblique and curling edges of knitted fabrics. Sometimes they need to be used to compensate for them.

The yarn structure of rotor spun yarn, air-jet yarn and vortex yarn determines its small twist. Rotor spun yarn Z twist and S twist exist at the same time, so the twisting potential is the lowest. Because of the high proportion of parallel fibers in jet yarn, the twisting force is small, and also has good post-processing characteristics.

　　 5 anti pilling

Vortex yarn knitted fabric has good wear resistance. Anti-pilling High grade. This is because the vortex yarn is made of straight core spun yarn, wrapped with filament wrapped around the outer layer, the fiber is obviously oriented, the yarn friction coefficient is large, the friction between the yarn and yarn is good, and the relative slip and wear resistance are not easy to increase. In addition, pilling is also closely related to yarn hairiness. By testing the pilling test, it can be seen that the vortex yarn fabric is 4 to 4.5, the air-jet yarn 4, the traditional ring yarn 2, the rotor yarn 2~3, and the compact spinning 3~4.