A Method Of Reducing Yarn Hairiness

It refers to the fiber protrusion that extends the surface of the yarn substrate.

With the improvement of textile quality and the widespread use of shuttleless looms, the harm of yarn hairiness is increasingly prominent.

Such as weaving high density fabric causes the opening of the warp is not clear, causing false suspension, three jump and other defects.

Shuttleless weaving often results in stopping the weft insertion, and when the hairiness is small, the fabric is smooth, smooth and clear.

Many hairiness, especially uneven, will appear weft, streaks and cloud spots.

Yarn hairiness has become an important factor affecting the quality of fabric production. Therefore, effectively reducing yarn hairiness has become a focus of textile enterprises.

Due to the recent continuous high temperature and low rain, the winding workshop temperature of the company is high and the humidity is low, and the hairiness growth rate of 3mm is even higher than 4.18 times. Therefore, under the condition of ensuring the winding forming and hardness, the company reduces the statistical tension of the winding hairiness as much as possible, from 120cN to 100cN. Under the condition of guaranteeing the completion of production, the lower winding speed is reduced from 1200 feather feather index Hm/min to 1000m/min.

Equipment adjustment: implement high standard and strict request in the cotton spinning machine platform, shorten the cycle to 15 days (formerly 30 days), pay attention to the maintenance of single spindle, and ensure the cleaning of yarn channel.

Do the temperature and humidity records, do the quota and timing (by shift monitor): check and record every 2h; pay attention to the maintenance of the temperature and humidity meter (regularly add water and replace the absorbent gauze on the wet bulb's head, and the hairiness index of the spinning tube yarn is also correct than the temperature and humidity), so that the humidity is controlled between 60~65, which is lower than normal, but the winding yarn of the winding tube is less than normal.

The H value has increased a lot, 60 hours must sprinkle the humidification, above 65 must stop humidifying.

And it is on the rise.

Sprinkler methods and specifications: before the sprinkler, clean the floor. Do not sprinkle lightly and sprinkle the water. It is strictly prohibited to pour the water directly onto the ground. The water should be sprinkled in the middle passage and the machine.

Mao Yu improved significantly: 1mm Mao Yu's H value was 29.2; 2mm Mao Yu H value was 4.6; 3mm Mao Yu H value was 0.77.

In order to control the yarn hairiness index, it is necessary to further study the physical index of roving and the choice of ring traveller and collar and the recession period of ring traveller.

Moisture regain of roving.

In the production process, the friction between fibers and fibers, and the mechanical surfaces can easily cause static electricity. When the fibers are charged with isoelectric charges, they repel each other, causing the fibers to not hold each other, causing the fiber ends in the yarn to expose due to static electricity and increase yarn hairiness.

The roving twist factor has a certain effect on yarn hairiness.

The coefficient of twist is too small. Roving is easy to appear in the winding and pportation process. The more fibers that appear on the roving surface, the greater the probability of hairiness in the spinning process.

In order to reasonably control the H value of yarn hairiness, it is suggested that the service life of domestic bearing steel collar should not exceed 30 months, and its hairiness value will deteriorate seriously after 30 months.

control

Its growth is a systematic project. It is necessary to strengthen the control of the physical indexes before roving, such as the moisture regain and twist coefficient of roving, the temperature and humidity of the yarn, the tension and speed of the winding, etc., and comprehensively adjust the process, equipment and operation, pay special attention to the quality of the basic work in the equipment and operation, and pay attention to the effect of temperature and humidity on the yarn hairiness growth fundamentally, so as to control the yarn hairiness index in all directions.