New technology of “continuous dyeing of fabric modified coating”
Question: What is the new technology of “continuous dyeing of fabric modified coating”?
Answer: The new technology of continuous dyeing of fabric modified coating has brought new concepts and practices to the design, development and production of washed fabrics. Clothes made of casual fabrics produced with this technology, such as washed series of jackets and casual pants, are consistent in style with the style pursued by European high-end products, and the natural distressed effect after washing is very soft, and the edges of sewing Some color transitions present a hazy effect, which reaches the level of European famous brands in terms of quality, color and style.
Question: Why is it so difficult to tell that this product is dyed with paint?
Answer: There are three factors: First, paint dyeing, as the name suggests, is to apply paint on the cloth surface. One notable feature of fabrics produced in China using paint dyeing is that the colors on the front and back of the fabric will not be the same. The new technology uses fiber modification to produce penetration, which makes the fabric produce a “transparent dyeing” effect. Therefore, the fabrics produced with the new technology, especially thin and medium-thick fabrics, have almost no color difference between the front and back sides. Secondly, because the fabrics printed and dyed with paint have the effect of adhesive, the feel cannot be compared with conventionally printed and dyed products. However, the new technology fundamentally removes the adhesive, so the product feels the same as conventionally printed and dyed products. If there is no In particular, many engineers and technicians who have been engaged in printing and dyeing all their lives regard products that are continuously dyed with denatured coatings as pad-dyed products. Third, the color fastness of ordinary pigment-printed products is very low, while the color fastness of fabrics produced with new technologies can reach about level 4 after being washed. It is precisely because of these obvious differences between the new technology and traditional paint printing that many “old masters” in the industry have never thought that these clothes with special styles are products produced by using paint dyeing.
Question: What are the social and economic benefits of using the new technology of “continuous dyeing with fabric modified coating”?
Answer: New technologies have made breakthroughs in energy conservation, consumption reduction, and pollutant emission reduction. Compared with the traditional dyeing process, the new technology of continuous dyeing of fabric modified coatings can save 20% of dyes (coatings), more than 95% of caustic soda, 100% of salts, and more than 50% of auxiliaries. In particular, it can reduce more than 90% of auxiliary wastewater. emission. In terms of energy consumption, compared with the traditional dyeing process, the new technology saves 31% of electricity, 30% of steam, and 94.8% of water in the dyeing process. Considering that the paint-dyed products are then washed with garments, the overall water saving is more than 50%. At the same time, the process route is greatly shortened, saving 65% of the floor space.
According to calculations by relevant experts, using the “new technology of continuous dyeing of fabric modified coatings” for printing and dyeing production, the overall resource consumption level is 57% of the traditional dyeing process, and each million meters/year of production capacity can save costs every year. 300,000 to 400,000 yuan. Each million meters of production can reduce total wastewater discharge by 12,000 tons/year, CODcr by 1.2 tons/year, ammonia nitrogen by 0.18 tons/year, and total phosphorus by 0.012 tons/year.
The new technology of continuous dyeing of fabric modified coatings has narrowed the gap between my country’s coating dyeing technology and the international advanced level, and finally achieved transcendence through innovation. Paint dyeing has been recognized as an eco-friendly dyeing technology that needs development. The application of paint printing and dyeing processes in the United States has exceeded 60%.
From the 1980s to the present, although paint dyeing technology has received increasing attention and corresponding development in our country, its proportion is still not high. Compared with the traditional paint dyeing process route, the new technology of continuous dyeing of fabric modified paint no longer uses auxiliary materials such as salt and alkali in the production process, and eliminates the two steps of flat washing, soaping, and reduction steamer, and has an obvious short process route. , energy saving and consumption reduction, reduction of pollutant emissions and reduction of production plant area. At the same time, the new technology of continuous dyeing of fabric modified coatings basically meets the dyeing requirements of various fabrics. It is more adaptable to different fibers, different tissues and different specifications, and the product quality can meet relevant technical quality standards. For fabrics with different performance requirements, paint scraper dyeing and paint jig dyeing can be used flexibly. For yarn-dyed and printed and dyed fabrics, paint over-dying can be used. For extremely dark colors, cold-dyed primer over-dying also has good results.
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