Common Fabric Finishing Process

Anti felting finishing

The directional friction effect caused by the scale structure makes the wool fabric produce great felting shrinkage when it is washed.

In order to prevent this phenomenon, chlorination method can be used to destroy the scale structure or to coat the scales with high molecular weight resin, so as to eliminate the directional friction effect of wool and achieve the effect of anti felting.

Chlorination is usually used in the processing of wool tops, but the working environment is rather bad and the ventilation in workplaces is better.

At present, because of the emergence of silicone resin and polyurethane resin, the processing of the latter is possible.

At present, domestic wool anti felting finishing agent has some AV-801, it is a silicone resin.

It makes use of the active groups in the silicone resin to chemically bond with the active groups in the wool protein molecules, forming a reticular film on the surface of the wool fibers, eliminating the directional friction effect caused by the scale structure of the wool, and achieving the purpose of anti felting shrinkage.

The water soluble polyurethane resin wool shrink proof agent NDR-9801, developed by the research group headed by Professor Yang Dingguo, has the same shrinkage proof effect.

Hygienic antibacterial finishing

In the wool textile industry, there are already high count shirt fabrics. These fabrics are often contacted with human skin.

It is necessary.

Organic silicon antibacterial and deodorant finishing agent AV-990, developed by advanced chemical Beijing branch and northwest Textile Institute, is a new type of sterilizing agent for organosilicon quaternary ammonium polymer.

It uses the active groups in silicone polymers to grafted cationic groups with bactericidal properties on the surface of the fibers, killing negative charged bacteria.

It mainly uses cationic groups to penetrate the surface film of bacteria, resulting in the efflux of bacteria and the bactericidal effect.

The agent was tested by the environmental hygiene monitoring Institute of the Chinese Academy of preventive medicine, and its LD50 was more than 10g/kg, which belonged to the actual non-toxic level.

It has no obvious irritation to skin and no skin allergy. It is a new and safe antibacterial finishing agent.

Dip finishing process

Finishing process: one dip rolling or two dip two rolling, the rolling rate is 70% ~ 80%, and then dry at 5min 110~130.

AV-990, 0.8% ~ 1.3% (o.w.f.), temperature 30~50 degrees, bath ratio 15~20: 1, dehydrated at 80~110 degrees.

? an antiseptic finishing agent is suitable for all kinds of textile fabrics.

Uniform, spinning is not easy to break, such as spinning cashmere high count knitting yarn, fineness should be below 16 m, fineness should be dispersed about 20%, but finely fined fiber also makes the fabric surface pilling. Therefore, it is best to use imitation treatment for cashmere fabrics.

For woven cashmere products, fineness can be around 16 m.

It contains coarse hairs.

According to the requirements of different products, determine the number of coarse hairs in plush, the knitted products should be strictly controlled below 0.5%, the woven products should be controlled below 0.7%, and the gross wool rate should exceed the required requirements, and then repeat the carding machine once again. Then the average length of the fibers should be reduced. If manual labor is used again, the cost of labor and time is not the best policy. Since 1985, the gross wool rate has not been raised generally, and it is generally higher than 0.5%, which is generally higher than 0.5%, even higher than 1%.

The color absorbs rate of coarse hairs is different from that of fuzz, so if coarse hairs are more, it will affect the color of suede and affect the quality of products.

Single fiber strength.

Although there are generally no specific criteria for examination, it should also be noted that if there is no deterioration,

Fiber strength will be reduced. According to practical experience, the strength of single fiber should be at least 3.7 grams or less.

The above quality indicators must be comprehensively analyzed and assessed, because some indicators are complementary to each other, and sometimes only one-sided consideration of fiber length, because the length is long and the selling price can be high, that is, without considering the amount of coarse wool and impurity, it is necessary to consider comprehensively the various quality indicators.