What is the difference between air-jet spinning and air-jet spinning?

The difference between air-jet spinning and air-jet spinning lies in the spinning method, structure and performance.

Open-end spinning:

Open-end spinning does not use spindles, but mainly relies on multiple components such as opening rollers, spinning rotors, and false twisting devices. The opening roller is used to grab and card the fed sliver fibers. The centrifugal force generated by its high-speed rotation can throw out the captured fibers. The spinning cup is a small metal cup. Its rotation speed is more than 10 times higher than that of the detangling roller. The resulting centrifugal effect discharges the air in the cup outward; based on the principle of fluid pressure, the cotton fibers enter the airflow cup. , and form a fiber flow, which continuously moves along the inner wall of the cup. At this time, there is a yarn end outside the cup, which draws out the fibers on the inner wall of the cup and connects them. In addition, the cup rotates with the yarn tail at high speed, which is like "feeding" the cotton fiber while adding yarn. The thread is kneaded to connect the yarn to the fiber on the inner wall of the cup, and is stretched under the winding tension of the yarn tube to continuously output the yarn to complete the process of air-jet spinning.

Characteristics of air-jet spinning:

Air-jet spinning has the advantages of high speed, large yarn volume, wide adaptability, simple mechanism and no need for spindles, steel rings and travelers. Double the production of spun yarn.

Air jet spinning

Jet spinning is a new spinning method that uses high-speed rotating airflow to twist yarn slivers into yarn. Air-jet spinning uses cotton sliver to feed, four rollers and double short aprons for super large draft, and is twisted into yarn through a fixed nozzle. After the yarn is drawn out, it is wound onto the yarn cone through the yarn clearer and directly wound into cone yarn.

Air jet spinning can spin 30-7.4tex (20-80 British count) yarn, and is suitable for pure spinning and blending of chemical fibers and cotton. Due to the special yarn formation mechanism of air-jet spinning, the structure and performance of air-jet yarn are significantly different from ring-spun yarn, and its products have a unique style.

1. Characteristics of air-jet spinning and its products:

1. High spinning speed. Air-jet spinning uses air twisting and does not have high-speed rotating parts (such as travelers in ring spinning), achieving high-speed spinning. The spinning speed can reach 120-300 m/min. The output of each head is equivalent to that of each ring spinning spindle. 10-15 times. 2. The process flow is short. Compared with ring spinning, air-jet spinning requires two less processes: roving and bobbin, saving about 30% of the factory area. Compared with ring-spun yarn, the number of workers per 10,000 spindles is 90, a reduction of about 60%. The machine material consumption is about 30% lower than that of ring-spun yarn. Daily maintenance costs and maintenance workload are also reduced.

3. The products are of good quality and distinctive. The comprehensive evaluation of the quality of air-jet yarn is good. Except for the yarn strength which is 5-20% lower than that of ring-spun yarn, other quality indicators are better than that of ring-spun yarn. The physical properties of air-jet yarn, such as evenness CV value, coarse details 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-spun yarn. It is suitable for the weaving of new looms such as rapier looms and air-jet looms, and can increase the production efficiency of the loom by more than 2%.

In addition to being similar to ring-spun yarn, the quality of air-jet yarn is also unique. The friction coefficient of air-jet yarn is larger, the yarn is directional, and its friction performance is also directional. The wear resistance is better than that of ring-spun yarn, but the hand feel is harder.

With the addition of some additional devices, air-jet spinning can also develop some special varieties of yarns, such as fancy yarns, core-spun yarns, mixed yarns, etc.

4. Wide variety adaptability. Air-jet yarn can be used for both knitted products and woven products, with a wide range of varieties. The products with more applications include: knitted T-shirt products, the fabric surface is even and plump, no skew, few stripes, fewer stripe defects, anti-pilling, cool and breathable, and strong three-dimensional effect; bedding, which uses air-jet yarn to dry well and stiff Characteristics, you can get the effects of even cloth surface, thick feel, crispness and good breathability; casual products, such as double-sided casual wear, sportswear, etc.

Based on the characteristics of air-jet yarn, unique style products can also be developed. For example, the stiffness and roughness of air-jet fabrics can be used to process them into linen-like fabrics, crepe fabrics, wool-like products, etc.