Dyeing And Finishing Technology: It Is Estimated That The Cost Of Dyeing And Finishing Per Ton Of Fabric Can Be Reduced By 31%.

< p > in the whole a href= "http://sjfzxm.com/news/index_z.asp" > textile industry < /a > industrial chain, the position of printing and dyeing industry is very important, which ultimately reflects the level and value of textile fabric products.

At the same time, printing and dyeing industry is a very serious industry for energy consumption, water consumption and discharge in the textile industry. The traditional cotton knitting dyeing process is mainly followed: 98 C high temperature drifting, 60 C dyeing and 95 C soaping. During the whole dyeing and finishing process, the drifting drifting and soaping must be controlled above 95 degrees C, so as to achieve the ideal processing effect.

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＜p＞　　传统的染整加工理念认为，棉纤维除纤维素外，还含有蜡质、含氮物质、果胶、灰分、色素等天然共生物，这些天然共生物在练漂阶段必须全部去除，这样才能满足后续染色的要求，练漂工艺一般采用高温强碱的化学方法将织物在95~100°C的高温中处理30~60分钟，通过烧碱、表面活性剂、双氧水等化学品的水解、皂化、乳化、净洗、增溶、氧化以及溶解等物理化学作用将上述的天然共生物以及沾附的其他杂质去除，在如此强烈的化学作用下，棉纤维上的天然共生物(包括有益的棉蜡等)被去除殆尽，所以传统工艺耗能高，织物损耗大，排污严重，手感粗糙，布面折痕和擦伤非常明显，随着国家在能源和排污方面的政策的不断出台，传统工艺的应用局限性越来越明显，使用传统工艺的染厂在能耗和环保方面的压力也越来越大，从而促进了染整工艺逐渐向低能耗、

In recent years, with the rapid development of cotton knitted processing auxiliaries and equipment, low temperature processing and continuous continuous machining have gradually become the two main development trends.

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< p > > a href= "http://sjfzxm.com/news/index_z.asp" > low temperature < /a > scouring and bleaching is one of the most important development trends of cotton knitted scouring and bleaching process. The low temperature scouring and bleaching process of the cotton fabric with high retention and co culture, which is composed of biological enzymes and hydrogen peroxide activators, has been successfully applied to the low temperature scouring and bleaching process of the whole cotton fiber processing technology at 60 degree temperature and low temperature dyeing and finishing. It has successfully drifted the scouring and bleaching temperature from 98 to 60 degrees by using enzyme enzyme scouring, low-temperature scouring and low-temperature activation of hydrogen peroxide. The enzyme is alkaline pectinase, which can effectively hydrolyze pectin on cotton fibers at 50~80 50~80 and achieve the effect of targeted impurity removal.

Hydrogen peroxide activator is an amino nitrile compound. Under alkaline conditions, it can produce peroxide carboxylic acid with higher oxidation-reduction potential than HOO- decomposed by hydrogen peroxide. The peroxide carboxylic acid has stronger bleaching capacity than hydrogen peroxide, and can be bleached at low temperature. Therefore, the processing condition is mild, which can reasonably retain and effectively control the total biological content of cotton wax and so on, and can greatly reduce energy consumption, reduce fabric loss, reduce pollution and improve the handle and cloth quality. The technology has achieved normal industrial production, and has successfully selected Sixth Batch of "China's printing and dyeing industry energy-saving and emission reduction advanced technology recommended catalogue".

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< p > 60 degree scouring and bleaching process can reduce sewage, reduce wastage, improve hand feeling and improve the quality of cloth. It is mainly due to the retention of a considerable amount of cotton fiber and other useful cotton products at 60 degree low temperature. Dyeing at less than 60 degrees can effectively retain the common organisms left by low temperature scouring and bleaching.

Most of the reactive dyes currently used can be dyed below 60 degrees. By optimizing the dyeing conditions and controlling the dyeing process reasonably, reactive dyes can be dyed with the required dyeing depth under the condition that the fabric contains a considerable amount of cotton wax, and can be evenly dyed (little residue of traditional technology, such as cotton wax and so on). Thus, the ideal dyeing effect can be obtained, and the color fastness is also in line with the requirements. This is also essential for the realization of the whole low-temperature dyeing and finishing process.

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< p > < a href= "http://sjfzxm.com/news/index_z.asp > > /a >, from the whole processing flow, it is very limited to achieve 60 degree low temperature scouring and bleaching and 60 degree dyeing.

在传统工艺中，练漂和皂洗工序的加工温度都要求在95℃以上，如果仅在练漂工序实现了60℃加工，而后续仍然进行95℃高温皂洗，那练漂工序所保留的棉蜡等有益的共生物同样会被大量去除，这样60℃练漂工艺在排污、损耗、手感和布面效果等方面所获得的优势将不复存在，所以只有实现60℃练漂、60℃染色、60℃皂洗全流程的低温加工，才能将低温工艺的优势保留到最后，最终获取最大的综合效益，实现印染行业的节能减排，通过合适的低温皂洗剂的制备及其相应的工艺过程的开发，将皂洗温度从95℃降至60℃，既能达到产品所需的皂洗效果，又可以保留通过低温练漂所留下来的棉纤维上有益的天然共生物，该技术已经实现正常工业化生产。

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< p > because of the obvious difference in the processing concept and processing technology between the cryogenic process and the traditional process, this technology aims to master the technological structure of the cryogenic process through the systematic research (rationalization of the technological formula and various performance indexes of the fabric after processing), and the machining characteristics of each processing ring (including scouring, bleaching, dyeing, soaping and finishing) are different from the traditional processing characteristics, so as to realize the industrialization of the research on the integration technology of the high retention 60 cotton low temperature dyeing and finishing process.

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