Printing And Dyeing Equipment Towards Green Environment

Under the guidance of the global low carbon economy and under the guidance of the national energy conservation and emission reduction policy, the development of dyeing and printing equipment is developing towards the direction of water saving, electricity saving and less pollution.

China International Conference held in June this year, 2010

Pretreatment equipment: energy saving as the goal

Pretreatment is the basis for ensuring the quality of printing and dyeing products. It is a large consumer of water and energy consumption in printing and dyeing process. Its water consumption accounts for more than 60% of the whole printing and dyeing industry, and the pollution level accounts for more than 70%.

Therefore, upgrading the energy saving and environmental protection level of traditional dyeing and finishing equipment is a main direction of equipment manufacturing enterprises in recent years, and has achieved great results.

The typical cold pad batch process is developed by the German GOLLER company. The process is short and the energy saving effect is very significant.

In addition, in the development of pre-treatment equipment, the new technology of water less is being implemented to reduce the consumption of water and chemicals from the source.

According to the technological requirements, the Soft-Coating double faced liquid feeding device exhibited by the German MONFORTS company at the 2010 China International Textile Machinery Exhibition and ITMA Asian exhibition, the fabric can carry out one side liquid feeding and two side liquid feeding. Two grooves can place different liquids for different types of processing on two sides. By adjusting the rotational speed of the liquid roller by microwave detection, the required moisture content, the time of liquid feeding and the depth of penetration can be obtained.

With this liquid feeding method, the liquid ratio of fabric is only 10% to 20%. Some do not even need to bake. The effect of saving water, saving chemicals and saving heat is ideal.

Domestic printing and dyeing equipment has also made great breakthroughs in energy saving.

The ultrasonic washing machine of Jiangsu red flag has applied the ultrasonic wave to the fabric washing, which has attracted the attention of the industry.

Zhangjiagang Jianye

In order to reduce energy consumption, the equipment manufacturers also work hard to shorten the technological process. However, due to the constraints of technology and chemicals, there has not been a real pre-processing equipment for printing and dyeing.

Therefore, the situation of large amount of water and steam before treatment has not been fundamentally changed.

The concept of zero emission system launched by Benin Ge in 2008 is still not being promoted in actual production due to the restrictions on the use cost and other factors. However, the industry has revealed that the relevant technical conditions of "zero emissions" are already available, which is bound to be the ultimate goal of the printing and dyeing industry.

dyeing

In order to achieve the effect of saving water, low bath ratio has become a technical goal of dyeing machine.

Lixin, THIES and other international famous printing and dyeing equipment manufacturers at the 2010 China International Textile Machinery Exhibition and ITMA Asia exhibition show the dye bath ratio of 1 to 3.

At present, most printing and dyeing enterprises in China use batch dyeing machines, especially overflow dyeing machines.

The key to the technological progress of batch dyeing machine is how to reduce energy consumption and emissions, improve the reproducibility of process and reduce dependence on human beings.

Starting from the goal of energy saving and emission reduction, the dyeing machine manufacturers in China have constantly improved the overflow dyeing machine, and introduced various ultra-low bath ratio (1: 4.5) dyeing machines. However, it is difficult to achieve the actual production in terms of the current structure of the fabric traced fabric.

Continuous flat width dyeing for woven fabrics is very mature at present. However, the continuous flat dyeing of knitted fabrics has not been produced and applied. Domestic manufacturers, such as Jiangsu's red flag, new Union and Jianye, all have their own core technologies, basically woven fabric continuous pad dyeing machines. Each unit has no technical change or innovation.

At present, the study of flat width continuous dyeing machine is mainly focused on dyeing of knitted fabrics, but tension and curling problems have not been breakthroughs. Most of them are still in conceptual discussion and propaganda.

To really solve this problem, we need a process.

The German Fuji (MONFORTS) wet steaming (wet short steaming) continuous dyeing machine has a very good design concept. It has a special design on the cloth roller, which can produce slight expansion of the fabric, prevent curling, and not cause excessive tension and fabric surface damage. It has a good guiding significance for the continuous flat dyeing of the knitted fabric.

It is worth mentioning that cold pad batch dyeing is a kind of dyeing method with high attention in recent years.

Its advantages are salt saving, steam saving and short technological process, which is in line with the current demand of low-carbon economy development advocated by the state.

However, cold pad batch dyeing is currently limited to reactive dyeing, and the quality of cold pad batch dyeing is affected by many factors, such as the quality of fiber and grey cloth, the quality of pre-treatment, etc. many domestic dyeing mills cannot guarantee the quality of these related processes because of the management and technological process, so it is easy to cause unstable quality of cold pad batch dyeing.

It is understood that cold pad batch dyeing has been used in many dyeing factories abroad.

Facts have proved that the cold pad batch dyeing technology itself has basically matured. The key problem is that the printing and dyeing factories must ensure the quality of each process before achieving cold pad batch dyeing.

According to the analysis of the industry, from the perspective of enterprise integration and technology upgrading in the printing and dyeing industry, we should encourage enterprises to apply cold pad batch dyeing, which is not only conducive to energy saving and emission reduction of enterprises, but also has practical significance for the entire printing and dyeing industry to achieve low-carbon development.

Printing machinery: more precise and efficient

With the rapid growth of China's printing industry in recent years, printing machinery manufacturing industry has maintained a good development trend in recent years.

Especially in recent two years, despite the impact of the financial crisis, sales of printing equipment are still in short supply.

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From the products displayed on 2010 China International Textile Machinery Exhibition and ITMA Asia exhibition, we can see that rotary screen printing machine continues to develop towards more precise, efficient, practical and convenient direction.

As an international leader in the technology of rotary screen printing, Holland STORK company has developed a new type of Picasso EVO rotary screen printing machine, which has reached a new height in terms of electrical configuration, practicability, ease of operation and maintenance.

The domestic printing machine is approaching the level of European first-class products in terms of color matching and parts processing.

The UNICA model introduced by Huangshi Jingwei and Italy Meichi company has greatly improved the technology level of the domestic rotary screen printing machine.

As the largest market share of rotary screen printing machine, its rotary screen printing machine has a good performance in precision, efficiency and practicality.

Xi'an DGE3080's rotary screen printing machine produced by de Gao and Da Vinci circular screen printing machine of Fujian Ju Wang have their own innovative points.

With the growth of demand, the flat screen printing machine has greatly improved its sales volume while improving its production speed and satisfying the printing of heavy fabrics.

The flat screen printing unit developed by Brussels, Switzerland, is all driven by servo motors, which is more precise.

The large scraper flat screen printing machine exhibited by Qi Zheng company separates the lifting tool structure from the lifting net structure, which is separately driven by the servo motor, making the scraping and printing more coordinated, thus improving the production speed of the equipment.

The application of digital printing technology has also been widely implemented in recent years. At the same time, digital printing technology is also improving, printing speed is further accelerated, the cost is further reduced, and product market recognition is higher and higher.

The printing speed of Italy Meichi company has been up to 400 sq m / h, and Italy MS has announced that its printing speed is 370 sq m / h.

Hangzhou Honghua has also been highly recognized in the domestic market for high-speed inkjet printing machines. At the 2010 China International Textile Machinery Exhibition and ITMA Asia exhibition, they demonstrated the printing process of domestic paints and inks.

The DSDPM (II) -160 printing machine exhibited by Shaoxing Dongsheng Digital Corporation has finished the printing process after printing the pattern pattern after the digital ink-jet printing. After finishing the whole part of the printing process, the process of steaming, washing and so on is completed. There is no water intervention in the whole process, and there is no sewage discharge. The water-saving effect is obvious.

Experts believe that with the improvement of product market recognition, the industrial application of digital printing has begun.