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The principle of waterproofing is like the lotus leaf effect. When water drops fall on the lotus leaf, the water droplets cannot penetrate but can roll freely due to the joint supporting effect of the air layer, the nipple bulge and the waxy layer. At present, there are three types of waterproof commonly used: fluoropolymer; Organosilicon type; Wax and waxy material. Fluorine waterproof according to the length of the carbon chain structure is divided into: C8, C6, C4. Fluorine-based waterproof electrolytic compounds include PFOA/PFOS and other fluorides. PFOA/PFOS have been limited by REACH and OEKO-TE, and PFOA/PFOS must be zero-emission from 2015

Moisture permeability is one of the most important indicators of outdoor function, which directly reflects human wearing comfort.

Moisture permeability requires that the fabric is not only wind and rain proof, but also can let sweat steam through, so as to ensure the comfort of human wearing.

This chapter mainly introduces the principle of moisture permeability and five test methods.

Ski wear plays an important role in the field of outdoor sports. One of the features of ski wear design is his color design. As winter outdoor sports clothing, the color of ski wear should try to give people a warm feeling, so the choice of color tends to warm color series, such as red, yellow and so on. In addition, an important functional feature of ski wear color is to meet the requirements of safety. Skiing is a dangerous sport, and striking colors help to form a good visual focus, attract attention, usually warm colors, bright colors, strong contrast colors have high visibility, have a warning role. Contrasting shades and shades of color have always been the favorite of ski wear designers, such as red and white, black and white, etc. If polyester fabric is selected, then brands, clothing factories and fabric factories have to face a severe problem: polyester color transfer! Polyester color transfer is unavoidable, but can be improved. Based on theory and practical experience, our company summarized the causes of polyester color transfer and six suggestions to improve the problem.

Color fastness to chlorine bleaching is a basic index for evaluating imported garments in developed countries. Chlorine bleaching refers to the use of sodium hypochlorite (alkaline) oxidation - to destroy the structure of the dye, so as to achieve the purpose of fading. Fabrics with poor bleaching fastness to chlorine are also prone to color change in alkaline environment.

US standard test method for color fastness to chlorine bleaching is: AATCC 188-2002. The principle is: put laundry detergent and chlorine bleaching solution into the sample, at the appropriate temperature with friction mixing, repeat 5 times of household washing, and then assess the color fastness of the sample after washing. The test method of AATCC standard is no different from that of ordinary household washing, so the standard color fastness test method is more suitable for the real environment of the garment.

Our company also encountered this kind of situation in the actual order operation. After the garment was finished, color spots were found in the fabric, which was also found in the part of uncut fabric. In view of this situation, our company conducted a series of experiments and analysis, and put forward relevant suggestions.

DMFa dimethylformamide is a low volatile solvent, widely used in coating, transfer film process, especially wet coating. DMFa is associated with cancer and is likely to lead to neonatal defects. General customer limit: 10ppm for children, 30ppm for adults

Fluorescent color is favored by designers because of its bright color. However, fluorescent color has a fatal defect: when encountering nylon fabric, especially red series, such as 17-2435TN,15-1456TN, etc., the color fastness of water stain is poor, and the risk is great. The fluorescent color fastness of nylon is a problem that cannot be solved at present.

At present, the main problems in the production of high-density nylon or polyester thin fabric composite TPU film in domestic fabric factories are as follows:

1, the problem of gluing: because the cloth is too thin, the glue is easy to penetrate into the cloth during the composite, resulting in the fabric can not be used.

2. Curling problem: the phenomenon of curling is easy to occur after the composite of high-density thin fabric, which makes it very difficult to make garments and cut them, and wastes more human hours.

In view of the above two problems, our company has comprehensively solved and overcome the existing problems from the production of composite roller, the improvement of composite machinery and equipment, the selection of membrane experiment and the adjustment of production process test. At present, the quality of mass production has been very stable, which has solved the headache problems of customers.