Study On The Degumming Process Of Hemp Technical Fibre

The hemp fiber is one of the most prospective cellulosic fibers. It has many natural healthcare functions, such as good bacterial repellency and inhibition, good moisture-absorption and air-permeability, radiation shielding, skin moisturizing etc. It is a real "green product", and many environmental protective textile and nonwoven-textile products can be developed from hemp fiber.The textile processing of hemp is still not ideal for the historical reasons and its inherent properties. Degumming is the most important process in the treatment of hemp fibres. It plays an important role in stabilizing and improving the product quality of the next process. In our country, the most widely used preparation method is chemical degumming. But this traditional method is time consuming and non- environmental-friendly. Although the degummed hemp can meet the need of carding and spinning, it isnot perfect enough, the quality and stability need to be improved.The thesis is based on these problems and finding the way to improve hemp degumming effect, so as to improve the quality of hemp product. There are not many researches on degumming process of hemp fiber whether at home or abroad. So the study is meaningful in improving hemp products and of more scientific value. It helps to speed up the technical progress.The main contents of this paper include:1. Applying the present methods of ramie pretreatments to hemp, finding the optimal degumming process for hemp.2. Reserching further on the process of hemp Enzymatic Degumming , including kinds of Enzyme, auxiliaries , conditions and so on, in order to reduce gum and alleviate the burden of the subsequent chemical degumming process.3. Finding the optimal conditions of chemical degumming process.4. Comparing the degumming effect of Enzymatic—chemical degumming process and chemical—Enzymatic degumming process.Then test the Residual gum and lignin content, and obtain the optimal processing conditions and parameters of enzymatic degumming of hemp. Because the vitality of enzyme is not highenough, enzymatic degumming is not effective. After the further chemical degumming, the requirement of spinning yarn is reached.