Sanyang Textile: Reduce Hairiness And Improve Combed Yarn Grade.

Generally speaking, high-end products require very high yarn hairiness. Excessive hairiness will cause unclear openings in the weaving process, increased breakage and lower efficiency of looms, which will also cause fabric to produce plush and affect fabric style.

Sanyang Textile Co., Ltd.

The proportion is 100%. In order to reduce the yarn Mao Yu and improve the product quality, the company's organization tackling group has carried out a lot of research and Analysis on reducing combed yarn Mao Yu, and achieved good results.

There are many factors that cause hairiness, such as raw material, technology, mechanical state, and so on.

Temperature and humidity will have a certain effect on hairiness.

Therefore, when the raw material is selected, the fineness, length, uniformity and short fiber rate of the fiber should be controlled according to the requirements of yarn hairiness, so as to create good conditions for reducing yarn hairiness.

After that, the process of pre spinning should also reduce fiber damage, eliminate short fiber and improve the fiber's straightness so as to make the semi finished products uniform, smooth and hairless, so as to lay a foundation for reducing the yarn hairiness.

In the process of cleaning, we should reduce

For damage, short flow should be selected and the speed of the beater should be reduced appropriately.

In the carding process, we should reduce fiber damage and exclude short fiber.

The speed of carding needle roller has a great influence on the increase of short staple, so the speed of the needle roller should be reduced appropriately so as to reduce the damage to the fiber.

At the same time, increase the speed of the cover plate appropriately and increase the elimination of the short pile.

Sanyin Textile Co., Ltd. produces long staple cotton on the carding machine. The lower speed of 360r/min and 810r/min is chosen for the cylinder and the thorn roller, and the higher speed of 260mm/min is chosen for the cover plate.

In the combing process, we should strengthen the elimination of the short pile, and reasonably control the rate of combed noil is an important measure.

But the rate of combed noil is related to spinning cost, so it should be reasonably determined according to specific requirements.

Long staple cotton has long fiber length and short staple rate, and the rate of combed noil is generally below 18%.

The total drawing ratio of the combing preparation process is reduced, which can reduce sticky roll and reduce hairiness.

The combing process should also strengthen the repair of the holes and rotten edges of the cotton web so as to ensure that the fibers are straight.

In the drawing process, the key is to optimize the drafting process and improve the fiber's straightness.

The overall drawing of combing varieties should be grasps to a minimum, so as to prevent the stripes from being too ripe and slit.

In addition, the drawing speed of the single eye drawing strip of Sanyang Textile Co., Ltd. is controlled within 410m/min, so as to prevent the sliver from winding and rotting.

The diameter of the bell mouth of the drawing is small, so that it can increase the tightness of the sliver and avoid the rotten sliver.

In roving process, emphasis should be placed on increasing the density of the sliver and improving the finish of roving.

It is necessary to adopt suitable collector openings, whether the collectors are smooth or not, the size and geometry of the openings have great influence on yarn hairiness, and the opening of the collectors is small, so that the roving can be properly folded to make the roving tightly and polished. Proper addition of roving twist coefficient and larger roving twist coefficient can prevent fiber diffusion in spinning drafting process, and reduce yarn hairiness.

The roving twist factor should generally be selected at 102.

There are many factors that affect the hairiness of spinning process, such as spinning technology, cots, aprons, rings, travellers and other spinning equipment, mechanical conditions, workshop temperature and humidity. Spinning is the most important process to control hairiness.

Process factors: first, the location of the front roller.

The front roller of the spinning machine is moved forward properly, reducing the surrounding arc of the fiber on the front roller, reducing the twisting triangle area and reducing the yarn hairiness.

The amount of rubber roller should be controlled at 3mm.

Followed by the spinning process.

Reducing the drafting ratio of the back zone and enlarging the center distance of the back roller can enhance the polymerization of the fibers in the drafting area, reduce the diffusion degree of the fibers in the drafting area, and increase the tightness of the sliver into the front drafting area, which is conducive to reducing the yarn hairiness.

But the draft in the back area is too small, and the yarn is easy to harden. Generally it can be controlled by 1.18~1.25 times.

The third is the twist factor of spinning.

Increasing yarn twist factor properly is good for reducing hairiness.

The choice of twist coefficient depends mainly on the requirement of the final product to the spinning and the production of yarn.

Increasing yarn twist factor properly is good for reducing yarn hairiness.

The fourth is spinning spindle speed.

For varieties with high hairiness requirements, spindle speed should not be too high.

The fifth is the weight of the traveller.

Within a certain range, the tightening of travellers will help reduce hairiness.

Equipment factors: first, use the low hardness cots.

The selection of Rubber Cots with lower hardness can increase the grip area and reduce the twisting triangle area, which will help to reduce the spinning Mao Yu.

Secondly, reasonable selection of steel collar and traveller.

The type and matching of steel collar and traveller affect the size of the traveller's yarn channel and the steady state of the traveller's running, thus affecting the yarn hairiness.

Sanyang Textile Co., Ltd. selects PG1-3842 steel collar and L1f Blake ring traveller to cooperate, and the effect is better.

Third, reasonably determine the service life of rings and travellers.

Generally, there is a running in period, a stable period and a recession period between the travellers and the rings in an exchange cycle.

In the running in period, the recession period and the steel collar, the ring travellers have poor matching conditions, poor smoothness in operation, large fluctuation in the yarn tension, and large friction force on the yarn to the yarn, so the yarn hairiness is more.

During the stable period, the travellers are running smoothly, the fluctuation of spinning tension is small, and the yarn passages are smooth, so the yarn hairiness is less.

Especially when the steel ring is worn seriously, it is easy to cross the channel, and the yarn will be shaved by the worn notch to produce more hairiness.

Therefore, we should pay attention to grope for different types and different types of travellers and make reasonable exchange cycle to avoid overdue use.

At the same time, the length of the steel collar affects the hairiness.

Mechanical state: in the spinning process, the guide yarn hooks are worn and grooved, and the finishing degree is reduced. It is easy to scrape the yarn and increase the yarn hairiness.

The yarn guide hook, the collar and the spindle are three different centers, causing the air ring to be wrong, causing the yarn to rub and impact with the spacer plate and rub against the top of the tube, so that the yarn hairiness multiplied.

When the spacing between the traveller cleaner and the steel collar is too large, the cleaning effect will be invalid, and the number of travellers will increase.

Therefore, in the actual production, we must keep the yarn path clean and clean, attach importance to equipment maintenance, find that problems should be repaired in time, and keep the equipment in good condition.

Temperature and humidity in workshop: temperature and humidity affect the rigidity and conductivity of fiber, so it also has certain effect on yarn hairiness.

With relatively large humidity, the fibers will be softer and easier to be twisted into the yarn.

Therefore, the relative humidity of the spinning workshop should be increased appropriately. The relative humidity of the spinning workshop of Sanyang Textile Co., Ltd. is generally controlled at 55%~60%.

The winding process is the most frequent process of hairiness, which generally needs to increase by 1 times. This is mainly due to the friction of various parts on the yarn.

The yarn hairiness increased with the increase of winding speed.

Therefore, in order to reduce the yarn hairiness, the proper low winding speed should be selected as far as possible.

The greater the yarn tension, the more hairiness.

The reason is that the yarn tension increases and the friction between the yarn and the machine increases, so the hairiness increases.

It is helpful to reduce yarn hairiness if the winding tension is properly reduced without affecting the forming process of the cheese.

Mao Yu problem is the comprehensive embodiment of raw materials, technology, equipment and management level. It is also a difficult point for textile technicians to study and control for a long time. Over the years, people have been studying and taking measures from various production links to improve the reduction of Mao Yu in ordinary ring spinning, but there is still a certain gap from the higher requirements of people.

Although the compact spinning process has achieved significant results in reducing hairiness, equipment pformation costs a lot of money.

Therefore, ordinary ring spinning should be properly selected and various special parts are selected, new spinning equipment should be selected, reasonable process should be studied and discussed, and the Mao Yu problem should be minimun.