Trend Of Dyeing And Finishing Machinery: High Efficiency, Energy Saving And Environmental Protection

Over the past two years, new technologies, new technologies and new equipment have been emerging at home and abroad, showing the momentum of vigorous development of the global printing and dyeing machinery industry. Energy saving, environmental protection and high efficiency are the direction of the sustainable development of dyeing and finishing industry in twenty-first Century. Short process and anhydrous processing technology, no plate printing technology, low temperature plasma treatment and other new technologies and automation technologies are the development trend of dyeing and finishing machinery in the future.

Since 2002, China's textile industry has made great progress, the speed of industrial upgrading has greatly accelerated, and the purchase amount of textile machinery equipment has also increased rapidly. In 2002, imports and dyeing machinery and finishing machinery amounted to 618 million US dollars, accounting for 19.4% of the total imported equipment, ranking second. In 2003, our import and dyeing and finishing machinery was 978 million, accounting for 21.10% of the total imported equipment, ranking first.

Since the last textile machinery exhibition, there have been many improvements and improvements in dyeing and finishing equipment at home and abroad. New technologies, new equipment and new technology exhibited at this exhibition further show the vigorous development of printing and dyeing machinery both at home and abroad.

At present, the general trend of dyeing and finishing equipment technology development is: to develop environmental protection, energy saving, saving time and high efficiency, short process, attach importance to anhydrous processing technology, no plate printing technology, low temperature plasma treatment and other new technologies; another important trend is the widespread use of automation technology, the spanmission system uses the AC variable frequency multi unit synchronous speed control system; in the control system, the programmable logic controller (PLC) or industrial computer control (IPC) is widely applied, and the on-line monitoring of parameters is widely applied, which improves the automation degree of dyeing and finishing equipment, and improves the stability and reproducibility of the process.

With the development of dyeing and finishing industry, modern information control technology based on electronic computer has penetrated into all fields of dyeing and finishing machinery. Dyeing and finishing equipment is widely used for integration, automation, man-machine conversation, process setting, automatic detection and control, and remote diagnosis.

Dyeing and finishing in ecology Environmental protection technology On the one hand, the international textile industry is developing rapidly. Manufacturers at home and abroad are paying more attention to environmental protection and energy conservation. Dyeing equipment emphasizes the efficiency of the equipment in the design scheme, which is conducive to ecological environmental protection, striving to optimize dyeing process and reduce consumption of chemicals and energy, so as to achieve the goal of high efficiency, high speed and short flow.

Dyeing and finishing production has the trend of short process and high efficiency. The short process and high efficiency process equipment are mainly cold pad batch pretreatment, wet short steam pretreatment, rolling mercerizing, cold pad batch dyeing, wet short steaming dyeing, rolling dyeing and high liquid feeding device.

The trend of textile personalization, comfort, functionalization and fashion promotes. Dyeing and finishing equipment To adapt to the trend of small batch, multi variety and multiple use of one machine.

The current trend of dyeing and finishing in the world is to develop new technologies and equipment based on the concept of ecology. Such as the use of anhydrous processing technology, no plate printing technology, low-temperature plasma treatment technology, nano technology, enzyme technology, etc., making the printing and dyeing finishing process shorter, more efficient and better product performance.

New technologies and equipment are mainly in the following aspects:

A new process for continuous treatment of knitted fabrics. Continuous flat width dyeing and finishing of knitted fabrics has not only improved. quality The fabric has small damage, good flexibility and reproducibility, and can reduce production cost by about 10% to 15%.

Improvement of mercerizing machine. The nominal width is 3200 millimeters, 3400 millimeters suitable for woven fabrics processing special width cloth direct roller mercerizing machine. A five roll or two roll thread micro pulling device is added between the straight roller soaking area and the mercerizing stable zone to effectively prevent the zonal shrinkage of the fabric after being impregnated with alkali.

Digital jet printing. Digital jet printing with printing technology revolution, printing speed up to (360dpi) 25 square meters / hour.

Alkali concentration on-line monitoring. The "alkali concentration computer on-line monitoring system" developed by Xi'an de Gao Jiamei printing and dyeing Co., Ltd. has a good man-machine interface. The whole machine controls the use of large size color LCD touch screen, showing intuitionistic, convenient operation, and state at a glance; through PID adjustment, it achieves no excess optimal control, with high accuracy and high stability.

In recent years, the degree of electromechanical integration of dyeing and finishing equipment has been improved, and the application scope of electronic technology has been expanding. In the product design, the modularization and building blocks are emphasized. The electrical drive is stable and reliable, and the tension is adjustable, so that the human machine environment can be fully coordinated. However, there is still a considerable gap between China's dyeing and finishing equipment and the advanced level abroad. If automatic control and program control are poor, online monitoring is not really solved; remote monitoring and fault diagnosis technology is not yet available in China; quantitative titration and automatic feeding are not necessary. The main gaps are as follows:

On line detection technology of dyeing and finishing equipment parameters: in the process of dyeing and finishing, mercerizing, dyeing, steaming and stereotyping, on-line inspection of certain process parameters is always the key technical problem of dyeing and finishing. The main requirement is to detect, spanform and control timely the parameter signals during the process of dyeing and finishing, and work steadily and reliably. At present, the key problem is to develop sensors that can detect parameters such as chromatic aberration, alkali concentration and hydrogen peroxide concentration. These parameters can be adjusted and controlled in time, which can greatly improve the dyeing and finishing quality, reduce consumption, improve the production rate, achieve higher repeatability, and maintain process stability.

The development of new equipment: at present, the innovation of dyeing and finishing technology is still lagging behind the world's textile machinery power. Dyeing and finishing equipment manufacturers should provide corresponding dyeing and finishing equipment according to the requirements of products. It is necessary to develop suitable processing equipment for the special requirements of new fibers Lycar, Tencel, Lyocell and Modal.

Manufacturing accuracy and matching: dyeing and finishing equipment manufacturing accuracy, matching parts quality and reliability is poor. We are lagging behind in new materials, new processes and new manufacturing technologies. The material of the key parts is very important, especially the wearing parts, such as bearing and guide roller, should be improved.

Energy saving and environmental protection: the development of printing and dyeing equipment should be closely matched with the development of technology and dyestuff. We should further study the process and equipment of desizing, boiling, bleaching, one-step dyeing, wet steaming, and so on, and solve the problems of energy saving and consumption reduction in the aspects of high efficiency unit and heat recovery, etc., and accelerate the development of heat spanfer printing technology, alkali recovery device, foam finishing, airflow dyeing technology and equipment, so as to meet the ever higher environmental requirements.

After sales service: the ability of after-sales service is far from meeting the needs of enterprises. There is a big gap between the service level and the international advanced level. We must attach importance to after-sale service and take service as an important means to improve and perfect the level of equipment technology.