Textile Technology | Development and Production Practice of Fancy Yarns

In recent years, fancy yarns and their fabrics, as a new star in the textile market, have been loved by consumers and have become a fashionable trend.

Fancy yarns refer to yarns produced by special processing technology, which have irregular or regular changes in appearance and structure, and are different from ordinary yarns. As a unique branch of yarn, fancy yarns have been widely used in various fields of the textile industry with their novel structure, colorful appearance and easy to create new effects.

2.1 Confirmation of fancy yarn style is difficult. Customers often extract a few or small sections from clothing or home textiles and ask the manufacturer to analyze the raw material composition, twist, twist direction and overfeed ratio of the core yarn, decorative yarn and consolidation yarn, and then try the sample. Generally, process design and trial production are carried out after the sample analysis is completed. The products produced in this process can only be approximate, and can only be put into production after the customer confirms. If the customer requires that it is exactly the same as the sample, all details such as production equipment and raw materials must be clarified before mass production can be achieved. In addition to sample analysis, this type of product also needs to include some design ideas. Some products may change in appearance or even completely unrecognizable when the raw materials change, so designers are required to have rich experience and judgment. It should be noted that if the sample is removed from the clothing, it has been a product that has undergone multiple post-processing, and what we design is the yarn. After finishing, the shrinkage of the core yarn and the consolidation yarn often causes qualitative changes in the pattern. Therefore, when making samples, we must consider the raw materials, equipment, driving speed, twist and other process factors.

2.2 Innovative independent design, active proofing, leading the trend Designers usually generate inspiration through market research, conduct conceptual design, and take the initiative to innovate in order to lead customer consumption. Structural design can be carried out on the basis of the original better fancy yarn products to derive a batch of new products. Such as bamboo yarn, gradient bamboo yarn (that is, the speed of the middle roller changes according to the requirements, and the rear roller also changes according to the requirements), AB yarn, color dot yarn, knot yarn, color dot bamboo yarn, segment color bamboo yarn, etc.

 

One of the most common quality problems in the production of fancy yarns is color difference. Therefore, a series of measures must be taken to prevent color difference in the production of fancy yarns. 6.1 The arrangement of the rovings entering the middle roller or the back roller must be uniform (1) If A yarn is on the left and B yarn is on the right, then the arrangement of the rovings on all spindles must be on the left. It is absolutely impossible for one spindle to have A yarn on the left and another spindle to have A yarn on the right, otherwise it is very easy to cause color difference. (2) The obvious color yarn should be arranged on the left, so that the secondary color covers the main color and it is not easy to have color difference. 6.2 Reasonable use of double-eye yarn guides. Double-eye yarn guides must be used at the entrance of the back roller to keep a certain distance between the two rovings to avoid mixing between fibers during traction. 6.3 Reasonable selection of process parameters (1) Minimize the twist difference as much as possible, because too much difference in spindle speed will increase the uneven twist and cause color difference. (2) Minimize the drafting in the back zone during drafting, and the pressure of the cradle should be consistent to ensure uniform yarn dryness. Conclusion

Due to the special yarn structure, the production process of fancy yarn is more difficult than that of ordinary ring-spun yarn. Therefore, according to the structural characteristics of different fancy yarns, corresponding technical measures should be taken to stabilize the production status and ensure product quality. However, fancy yarn has a relatively high added value and is one of the directions for adjusting the product structure of enterprises.