The Ctt Yarn Quality Evaluation Applied Research

The CTT comprehensive evaluating system can be used to test various appearance and mechanics performance of yarns including diameter, unevenness, hairiness, conventional faults and dynamic breaking strength, friction and abrasion ability, thermal elongation and shrink when the yarns are running and so on. Generally speaking, the CTT system has better precision, more extensive range of testing speeds by comparison with the conventional instruments. Meanwhile, the exoteric condition (like the temperature and relative humidity, the color of fibers as well as the blended way) can not affect the testing results of CTT system. The testing process of CTT is thorough automatic and the testing results can be reserved easily. The CTT system can test even all performance of yarns and the testing results are steadier, which can not be compared by any other machines recently. The CTT keeps the running tension of yarns stable when they are running, which can make the testing results more correct and reproduced, this is also distinctive as well. The CTT system also has some particular testing items like the flying and the abrasion between the yarns and various parts of machines by simulating the running situation of yarns when weaves. In view of above advantages of the CTT, the article not only introduces the testing principle and testing process of each testing item and the influence caused by the testing situation (testing speeds and pre-tension), but also studies the relativity and finds out the interrelated equation between the CTT and other conventional apparatuses by experimental and mathematical methods, which can make the CTT more practical. Finally, the article does the comprehensive quality evaluating system of cotton yarns and picks up the appearance and mechanics factors to predict the general quality of yarns by using the CTT's results and main element analysis of statistics. On the base of quantitative compositor about two factors, the article sets up the comprehensive quality evaluating reference frame and does the subarea analyse, which makes the evaluating of comprehensive yarn quality and choosing the correct yarn according different quality demand more convenient, scientific and reasonable. The finish of above works can help CTT serve the practical testing better and make our testing field keep pace with international gradually.