The Latest Development Trend of Green Environmental Assistant Dyestuffs
In recent years, the Chinese economy has maintained sustained and rapid growth. As a big producer of textile products, the demand for dyes, auxiliaries and finishing agents is very large. This not only attracts chemical manufacturers in European countries and the United States, but also attracts the attention of chemical manufacturers in Asia. Japan, Korea, India Manufacturers in countries such as Japan have come. According to statistics, China’s dye production has grown rapidly in 2003 and has become a major producer, consumer, and trader of dyes, additives, and organic pigments in the world.
Advocating the concept of environmental protection and green is the only way for the sustainable development of the printing and dyeing industry; on the other hand, as energy and water resources are increasingly scarce, energy saving and water saving in some areas are even directly related to the survival of enterprises. Therefore, under the premise of ensuring and improving the quality of products, it is more necessary to consider the cooperation of printing and dyeing auxiliaries and shorten the process flow as much as possible. The requirements of environmental protection, energy saving and water saving complement each other, and suitable auxiliaries can play a multiplier role. In addition, the environmentally friendly additives are also easily removed in the sewage treatment process, which can increase the reuse rate of the treated wastewater and achieve a good water saving effect. The new dyeing and finishing auxiliaries that can shorten the process flow and save energy at this exhibition are a bright spot.
Victoria acid reduction cleaning agent. In the traditional process, in order to remove the floating color of disperse dyes, it is usually necessary to carry out reduction cleaning. Since the dyeing is carried out under weakly acidic conditions, and the basic conditions for reduction and cleaning are required, the dyeing waste liquid needs to be emptied and freshly added. Water and heat up again to 60°C for 15 minutes. And Cyclanon. ECO can be reduced and cleaned directly under acidic conditions. After dyeing, fresh water was not changed, the dyeing solution was directly cooled to 80°C, pH was adjusted to 3.5-4, and Cyclanon was added. The ECO is operated for 20 minutes to complete the reduction cleaning. In addition, Cyclanon. ECO is low foam and stable to air. More traditional craftsmanship, Cyclanon. ECO can at least reduce the energy required for one-time heating and one cylinder of fresh water, saving about 1 h of processing time per cylinder. At the same time, for the products containing spandex and polyester/wool blends, the reduction of acidic conditions also helps to protect the elasticity of the spandex and the wool fibers.
The German company ROTTA is an international chemical company known worldwide for the research, development and production of various types of textiles, dyeing, printing and dyeing, papermaking and leather chemicals. Its headquarters is located in Mannheim on the Rhine. Qingdao Longta Fine Chemical Co., Ltd. is a sole proprietorship company established by ROTTA in China in 1994. Qingdao Longta Fine Chemicals Co., Ltd. has brought together with the knitted fabrics, yarn dyeing process and a full set of additives, including oxygen bleaching effect aids 197, deoxygenase 180, for the improvement of water quality polyvalent chelating agent 130 and so on. Good pretreatment is the guarantee of successful dyeing. The fabric after oxygen bleaching should be uniform, thorough and clean. The technical process recommended by Qingdao Longta Fine Chemical Co., Ltd. is as follows: a rapid oxygen bleaching row of liquid cloth, a pickling row of liquid enzyme deoxidation dyeing. Suitable equipment includes overflow dyeing machines, cheese dyeing machines, air stream dyeing machines, continuous steam bleaching machines, and cold pad batch bleaching machines. The key auxiliary agent for rapid oxygen bleaching is oxygen drift auxiliary agent 197, which is composed of working solution with Hz0z and kept at 98~100°C for 45~60min (or 20min at 110°C, 15min at 120°C, 130°C) 5 min) can achieve good bleaching effect. If the hardness of the water used exceeds 350 X 10 and the water pipe is rusted, a 1% polyvalent chelating agent 130 may be added as appropriate. This process eliminates the need for caustic soda, penetrating agents, stabilizers, chelating agents and other additives, greatly simplifying the operation and improving the quality stability. The pH value of wastewater after bleaching is weakly acidic, and the color of COD and BOD is low, which reduces the intensity of wastewater treatment.
Enzyme preparation is a kind of protein and it is a biocatalyst. Because of its unique structure and three-dimensional configuration, it has the unique characteristics of reaction, and it has the advantages of high efficiency, low cost and high quality. In addition, the enzyme preparation is non-toxic, and it is easily biodegradable and has no pollution to the environment. Catalase belongs to the second generation enzyme preparation, which is produced by genetic engineering method. It has a greater role in shortening the pre-treatment process and improving the dyeing effect.