| Our country is famous for silk production, the supply and demand of silk is very large and is rising year by year, therefore, how to make the best use of waste silk is becoming more and more important. According to the research made by many experts and industries, the pretreatment processes of waste silk material are mature on the whole. But there are still many problems. Up to now, the traditional refining process of waste silk has troubles to hold silk glue while removing the oil Especially to the oily bisu material. So we try to find a new way to pretreat waste silk material with the aid of ultrasonic to solve these problems.Ultrasonic has some special functions such as precipitation,agglomeration,emulsification and dispersion. The new pretreatment processes may be more efficient and pollution-free. So the research is very significant. The main content of this paper is to study the effect of degumming and oil removing when the two different materials are respective under the action of the traditional method and ultrasonic method, and the change of the physical properties of refined wasted silk and get the best technological parameters between traditional method and ultrasonic method. The results are as follows:1. For waste silk bisu material(1) The conventional experiment with single-factor shows that the residual pupa gum and oil content will be low when the temperature, the alkali content and time is increased.(2) The conventional orthogonal experiment shows that the temperature is the most important factor, and its effect is obvious. When the temperature is about 90℃, the alkali content is about 0.4g/L and the time is about 15min ,we get the best result.(3) The ultrasonic experiment with single-factor shows that the residual pupa gum and oil content will be low when the temperature and time is increased.(4) The ultrasonic experiment with two factor shows that 60-70℃and 15min is the better factors.(5) Compared to the traditional process, the ultrasonic method gives a lower temperature, the alkali content, time and damnification?. It also saves the cost and sources. The use of ultrasonic in the refining of waste silk bisu material is completely available.2 .For waste silk frison material (1) The single-factor experiment in traditional process shows that the residual pupa gum and oil content will decrease when the temperature goes up ,and the alkali content and time rises.(2) The high sericin content waste silk frison material should be dipped before refining, to make it loose and to improve yield of the opening and carding of silk spinning. The use of JFC improves the loose degree and reduces processing hours. The optimum condition fordipping is : the temperature is 35℃, the alkali content is about 0.4g/L ,the JFC content is about 2g/L and the bath ratio is about 1:50, lasting 5 hour.(3) The Orthogonal test on traditional refining process shows that the optimum condition for the waste silk frison material is: the temperature is 100℃, the alkali content is about 0.4g/L,lasting 15 minutes.(4) The single-factor experiment on ultrasonic refine shows that the residual pupa gum and oil content will decrease when the temperature and time go up.(5) According to the comparison analysis between traditional and the ultrasonic process, the latter doesn't have any advantage over the former, it still needs a high temperature, alkali content, and processing hours as the traditional way.(6) The experiment using ultrasonic to dip shows that the processing time is greatly decreased . Whatever frequency is high or low, after 40 minutes processing, the residual pupa gum and oil content can be in the reasonable range.
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