Advantages, Disadvantages and Application Innovation of Sirospun Cotton Yarn

In recent years, we have paid special attention to the quality of cotton yarn and developed a series of siro spinning products, such as 10S/12S/16S, which have a large inventory and are cost-effective. Compared with traditional single-yarn ring spinning, siro spinning has many advantages, such as less hairiness, more even evenness, high anti-pilling properties, soft hand feel, good friction resistance, and better breathability. sex.

The following will explain the advantages, disadvantages and application innovations of serospun cotton yarn:

　1. The principle of sirospun

Sirospun is A spinning method that spins yarn with a ply-like structure on a traditional ring spinning machine is to feed two rovings with a certain distance apart on the spinning machine. After drafting, the two single rovings are output from the front roller. The yarn strips, and the single yarn strips have a small amount of twist due to the transfer of twist. After being spliced, they are further twisted into a ply-like yarn and wound on the bobbin. Siro spinning is also called double twist spinning. It is called A and B yarns in China. It has recently been officially named siro spinning.

　2. Advantages of Sirospun

　1. The breaking strength of the yarn is high; 2. The elongation at break is large; 3. Hairiness is greatly reduced; 4. Wear resistance and resistance to Good pilling; 5. Thickness and details are significantly reduced; 6. Flying in the workshop is reduced; 7. Energy and labor are saved; 8. Equipment investment is low;

3. Siro Comparison between spinning and ring spinning

　1. Improvement of straightness

　This is because Siro spinning is made of double rovings Feeding and merging in the drafting area, so evenness and coarse details are improved to varying degrees.

　2. Improvement of hairiness

This is because in the spinning triangle area, the single yarn is slightly twisted first, and then added twist. The sliver has become a cylinder at the main twist point, which is conducive to the entanglement of the fiber ends into the yarn body.

　3. Powerful increase

It is because the whisker has a triangular twisting area at the output of the front roller, and the whisker is The tension force twists them together to form double center yarn strips similar to strands. When stressed, the two yarn strips squeeze each other, making it difficult for the fibers to slip off. They have low hairiness and high fiber utilization, so they are strong.

IV. Problems prone to siro spinning

1. The yarn strips before merging are too thin and may cause accidental drafting;

　2. The details of the yarn are increased, and the finer the yarn, the more obvious the increase;

　3. Spinning yarn breaks increase and production efficiency decreases.

5. Siro spinning end-breaking treatment

Since Siro spinning is fed into the spun yarn drafting area by two slivers with a certain distance, which are drafted separately and then twisted into yarn, there is a situation where one of the two strands of sliver ends is broken and the other runs into a single yarn. , and when the spinning tension is stable, the ends will not stop, resulting in wrong yarn count. In order to ensure the quality of spinning, it is necessary to install a Siro spinning single yarn breaking device. After one yarn is broken, the breaking device can break the other single yarn. Yarn interrupted.

Six. Key points of converting ring spinning machine to siro spinning

　1. To double the number of roving feeds, The creel needs to be modified;

　2. The rear, middle and front yarn yarn collectors should be changed from a single head to a double-trough structure with a certain distance;

　3. The original yarn rewinding traverse device is abolished and replaced with fixed yarn rewinding;

4. It is necessary to install a roving end-break self-stop device to prevent Single roving feeding;

5. Because the strands are usually S-twisted, Siro spinning is also produced with S-twist, and the spindle transmission must be changed accordingly;

6. It costs about 100,000 yuan to modify each car (generally, ring spinning machines can be modified into sero spinning machines);

　7 . The modified spinning machine can be easily restored to the original ordinary ring spinning machine at any time as needed.

Seven. The price of siro spinning in the market

Cotton, polyester cotton series

　1. 8S-16S siro spinning price = ring spinning price + 500 yuan

2. Siro spinning price above 16S = ring spinning price + 500 Yuan-1000 Yuan