Summary：Maturity is the key to affect the yarn quality: various structural characteristics of cotton fiber affect the yarn quali...
Maturity is the key to affect the yarn quality: various structural characteristics of cotton fiber affect the yarn quality, and the most fatal defect of yarn is the uneven color absorption after dyeing treatment after weaving into grey cloth, which can not be tested and predicted in the whole cotton spinning test project.
At present, in the textile industry, if you want to know the result of cotton yarn dyeing, you can only know the result by weaving and dyeing the batch of cotton yarn. For the time being, there is no instrument or method to predict the situation. Of course, there are many reasons for the fabric to cross after dyeing, excluding weaving and dyeing problems.
Many people say that it is difficult to tell what causes the horizontal rising on the circular knitted fabric. My method is: knowing the number of yarn feeding routes of the loom, assuming that it is 90 routes, I will remove 90 yarns from the finished fabric, wrap each yarn on a cardboard, and then put 90 color yarns under the color light for comparison, so as to distinguish the deep, medium and light, such as obvious color difference, That is, the color receiving rate of cotton yarn is uneven, which has nothing to do with weaving. Uneven dyeing of cotton yarn, to the greatest extent, is due to the great difference in maturity of cotton fiber, resulting in uneven color reception. The proportion of cotton fiber with different maturity in the yarn is different, resulting in problems after dyeing.
Establishment of Standard Archives: first, establish a standard archives, which includes: a) standard archives of cotton fibers of various maturity, that is, standard drawings of each micronaire value; b) various patterns of cotton fibers from horizontal.
A. Standard pattern of each micronaire value: take all kinds of commonly used cotton and arrange the pattern according to its micronaire value, including raw cotton, sliver and cotton yarn (cotton yarn can calculate the number of fibers in yarn according to micronaire value for comparison with the actual situation).
B. Transverse fiber pattern: collect various transverse finished fabrics, fold the transverse part into fiber pattern, try to find out their common points in the transverse fiber pattern and make standard samples. Comparison with the standard sample office: collect a large number of flat cotton fiber sample drawings, compare them with the micronaire value drawings, and then determine the true maturity of cotton fiber. It is not difficult to find that most of the flat cotton fibers are immature fibers, and the query data is far from the micronaire value of cotton tested before spinning.
Try to check the cotton fiber maturity before dyeing, and then uate the situation after dyeing. After long-term operation, summarize the successful examples as the standard method of enterprises. For each characteristic and maturity of cotton fiber, test items, under various clear data, re understand the cotton fiber, and then make cotton blending and other processes, so that the problems after yarn forming can be solved in advance.
