What is steamed yarn? Is steamed yarn also important in the fabric production process?

Steaming process

● Step 1: Warm up the fuselage.

During the yarn steaming process, water drop spots on the yarn are a common problem. Water drop spots can cause dyeing and other problems in subsequent processes. Therefore, the preheating process of steamed yarn is absolutely necessary, especially for wool yarn.

● Step 2: Vacuum.

Lower the boiling point of water to produce the required low temperature saturated steam.

● Step 3: Heating.

Let low-temperature saturated steam penetrate into the conical bobbin. Every production process (spinning, twisting, weaving…) will cause tension effects on yarns and fibers, and the effect of tension will cause entanglement of yarns. The stress relaxation in the molecular structure of man-made fibers causes the fibers to shrink. Tension and tangles can cause problems in subsequent processes.

● Step 4: Keep warm.

By Zhen�The transformation into a low-temperature saturated steam state enables the entire package including packaging materials to be completely processed. The moisture of the cold steam is transferred to the yarn, which distributes the moisture absolutely evenly, achieving consistent yarn strength and friction values. At the same time, the heat treatment also relaxes the twist.

During the yarn production process, the fiber moisture is constantly evaporating. From raw materials to cheese, the cumulative humidity reduction exceeds 4%. Different spinning mills have different yarn moisture indexes. Increasing the speed of the machine will cause a large loss of weight (moisture); the high temperature and friction inside the machine will evaporate the moisture in the yarn and reduce the quality of the yarn. , which is not conducive to subsequent processing steps.

● Step 5: Secondary vacuuming.

The unique secondary vacuum design of the yarn steaming machine can ensure the yarn processing effect.

● Step 6: Secondary heating and heat preservation.

Ensures compensation for yarn weight loss and improves yarn quality.

Yarn humidification treatment (yarn steaming) is done after winding and before the yarn is put into storage. If the storage time of the yarn is long, it will be done before delivery. good. Appropriate packaging of yarn during transportation, such as yarn bags or yarn reels, tensioned and sealed wrapping, can maintain the humidity of the yarn. In addition, knitting and weaving can also benefit from humidifying the yarn before use. Research on weaving supply and demand shows that humidified yarn is better than non-humidified yarn (dry yarn). When humidified yarn is used for weft weaving, the number of machine stops will be greatly reduced, and the strength of the yarn will be greatly reduced. And the elongation at break is improved, the hairiness is reduced, and the weaving efficiency is increased by 2%. In terms of knitting, it can be seen that flying flowers are significantly reduced.

In trade, buyers will never accept additional price increases. The increase in yarn weight is also the increase in profits. Generally, the investment return period for yarn humidification treatment equipment is less than one year, while the investment return period for cotton yarn humidification equipment is even less than half a year. In addition, the quality requirements of export trade also require continuous improvement of yarn quality. Therefore, the humidification treatment of yarn has become an important part of contemporary textile technology, which can compensate for the loss of yarn weight and improve the quality of yarn.

Recommended steaming temperature/℃