Study On The Technology Of Bar-Type Ultrasonic Desizing

In the21st century, the global energy and environmental problems have attracted great attention. In China, in the face of these problems, a lot of constructive comments were raised. Energy conservation and emission reduction are the key. Each industry has the responsibility and obligation in the aspects of energy saving and emission reduction. And measures should be taken in improving the quality of products and reducing the damage to the environment. Textile, printing and dyeing industry as one of the polluting industries, is facing severe challenges. Desizing process, which is one of the biggest sources of pollution in textile production processes, should arouse people’s attention. To meet the requirements of low-carbon, green and environment-friendly, and to improve low efficiency,high energy and water consumption and other issues in traditional desizing methods, this paper presents a new type of desizing approach on the basis of ultrasonic cleaning technology----bar-type ultrasonic desizing technology.Some domestic and foreign researchers were trying to apply ultrasonic cleaning technology to the processes of textile desizing, and had achieved good desizing results. The main contents of this paper are as follows:(1) The idea of using bar-type ultrasound technology directly on fabric desizing based on the research of ultrasonic desizing at home and abroad is given, the theory of bar-type ultrasonic desizing is analyzed. A set of bar-type ultrasonic desizing equipment for experimental research is developed and assembled.(2) The combined effects of the bar-type ultrasonic desizing technology with alkali are researched. According to different parameters on the degree of influence to the desizing experiments, we selected four parameters as the experimental factors of the bar-type ultrasonic desizing, and got the optimal parameters of ultrasonic desizing process by L9(34) orthogonal experimental design. To study the relationships between the effect of bar-type ultrasonic desizing and size type, fabric specifications, two fabrics with different weave structures were selected for desizing experiment. Various fabric properties (such as the fabric breaking strength, elongation, whiteness, wettability, absorbance, dye uptake and scanning electron micrographs, etc.) of conventional alkaline desizing, bar-type ultrasonic desizing, ultrasonic-assisted alkaline desizing are analyzed and compared.The results showed that:using bar-type ultrasound technology directly on fabric desizing has practical value. The method using the bar-type ultrasound with the alkaline not only reaches the higher rate of desizing, but also the whiteness, wettability and dye uptake are improved. However, the breaking strength decreases. The bar-type ultrasonic desizing technology can not only improve the desizing efficiency, save energy resources and reduce environmental pollution, but also the desizing effectiveness and fabric performances are equal or better than that with conventional desizing methods.