Polyester yarn

402 100% polyester yarn for sewing thread virgin color yizheng fiber material

Ring spinning, rotor spinning, siro spinning, compact spinning, etc

1. Ring spinning:

Ring spinning is the most widely used spinning method in the market. Ring spinning refers to the introduction of the drawn sliver or roving sliver through the rotation of the ring traveler. The winding speed of the bobbin is faster than that of the traveler. The cotton yarn is twisted into spinning yarn, which is widely used in the spinning engineering of various short fibers. For example, in carding, combing and blending, the coiler is twisted by the bobbin driven by the sliver. At the same time, the friction of the ring makes the rotation speed slightly less than that of the bobbin. With high spinning speed, ring spun yarn is in the form of conical helix with internal and external transfer of fibers, which makes the fibers intertwined inside and outside of the yarn. The structure of the yarn is compact and its strength is high. It is suitable for various products such as yarn making, weaving and knitting.

Ring spinning (combing) process:

Cleaning carding pre drawing sliver winding combing drawing roving spinning winding winding

Ring spinning (carding) process:

Cleaning carding drawing roving spinning winding

2. Rotor spinning:

It is mainly composed of twister and multi roller. The carding roller is used to grab and carding the sliver fiber, which can be thrown out by the centrifugal force generated by its high-speed rotation. The spinning cup is a small metal cup. Its rotating speed is more than 10 times higher than that of the carding roller. The centrifugal effect produced by the spinning cup exhausts the air in the cup outward. According to the principle of fluid pressure, the cotton fiber enters the air flow cup and forms a fiber flow, which continuously moves along the inner wall of the cup. At this time, there is a yarn head outside the cup, which leads out the fibers from the inner wall of the cup and connects them. In addition, the drilling effect caused by the high-speed rotation of the cup with the yarn tail is like feeding cotton fiber while adding yarn kneading to connect the yarn with the fiber in the inner wall of the cup. The yarn is drawn under the spinning tension of the bobbin, and the yarn is continuously output to complete the air spinning Process.

Characteristics of rotor spinning

Rotor spinning has the advantages of high speed, large winding, wide adaptability, simple mechanism and no need of spindle, steel ring and bead, which can increase the spinning output by many times.

3. Difference between rotor spinning and ring spinning:

Rotor spinning and ring spinning are new textile technology and old spinning technology. Rotor spinning is rotor spinning, while ring spinning is mechanical spinning. It is twisted by spindle, steel bell and coil, and drawn by roller. In the case of rotor spinning, fibers are transported by air flow and twisted by one end. Generally speaking, ring yarn has less hairiness, higher strength and better quality. The process of rotor spinning is short, the raw material is short, the yarn wool, count and twist can not be very high, and the price is also low.

From the yarn structure, ring spinning is more compact, while the rotor spinning is more fluffy and rough style, which is suitable for denim fabric, and the air spinning yarn is generally thicker.

4. Air jet spinning:

Air jet spinning is a new spinning method which uses high-speed rotating air to twist the sliver into yarn. Air jet spinning adopts sliver feeding, four roller double short aprons super draft and twisting yarn through fixed nozzle. After the sliver is drawn out, it is wound to the bobbin through the yarn cleaner and directly wound into the bobbin yarn.

Air jet spinning can produce 30-7.4 tex (20-80 British count) yarn, which is suitable for pure spinning and blending of chemical fiber and cotton. Due to the special yarn forming mechanism of air-jet spinning, the structure and properties of air-jet yarn are obviously different from those of ring spun yarn, and the products have unique style.

The characteristics of air-jet spinning and its products are as follows

a. High spinning speed. Air jet spinning adopts air twisting without high-speed rotating parts (such as the steel ring in ring spinning) to realize high-speed spinning. The spinning speed can reach 120-300 M / min, and the output per head is equivalent to 10-15 times of that of ring spinning.

b. The technological process is short. Compared with ring spinning, air jet spinning has less roving and bobbin processes, saving about 30% of workshop area. Compared with ring spinning, 90 people are employed for 10000 spindles, which is about 60% less. The consumption of machine materials is about 30% lower than that of ring spinning. The maintenance cost and workload are also reduced.

c. The product quality is good, has the characteristic. The comprehensive evaluation of air-jet yarn quality is better than that of ring spinning, except that the yarn strength is 5-20% lower than that of ring spinning. The physical properties of air-jet yarn, such as evenness CV, thickness and yarn defects, are better than those of ring spun yarn. The hairiness above 3mm is less than that of ring spun yarn. Although the yarn strength is lower, the strength unevenness is lower than that of ring yarn. It is suitable for weaving new type looms such as rapier loom and air-jet loom. The production efficiency of loom can be increased by more than 2%.

Besides being similar to ring spun yarn, air-jet spinning has its own unique characteristics. The friction coefficient of air-jet yarn is larger, and the yarn has directionality, and its friction performance also has directionality. The wear resistance is better than that of ring spun yarn, but the handle is hard.

Some special kinds of yarn, such as colored yarn, core spun yarn and blended yarn, can be developed by adding some devices to air-jet spinning.

d. The variety adapts widely. Air jet yarn can be used not only for knitting products, but also for woven products. The more widely used are: knitted T-shirt products, the fabric surface is even and plump, no skew, less stripe shadow, less sliver defects, anti pilling, cool and breathable, strong three-dimensional sense; bedding, using the characteristics of air-jet yarn is dry and stiff, can obtain the effect of uniform cloth surface, thick hand feeling and good air permeability; leisure products, such as: double-sided casual wear, sportswear, etc.