Effect on yarn elongation at break For single yarns, twisting reduces the possibility of fiber slippage in the spinning yarn and increases fiber elongation and deformation, which i…

Effect on yarn strength For short fiber yarns, the direct function of twisting is to obtain strength, but it does not mean that the greater the degree of twisting, the greater the …

Effect of twisting degree on yarn diameter and density The degree of twisting of the spinning yarn not only affects the appearance quality such as diameter and finish of the spinni…

Yarn evenness test method There are many ways to test the unevenness of spinning yarn. Here are only two commonly used simple methods. 1. Cut-off weighing method: Use a yarn length…

The main reasons for yarn evenness and uneven evenness 1. The evenness of the spinning yarn (line density, linear density uniformity) refers to the degree of change in thickness al…

Line density deviation Due to process, equipment, operation and other reasons, there will be a certain deviation between the linear density of the actually produced spinning yarn a…

Yarn fineness index The fineness index of spinning yarn is the same as that of fiber and can be divided into two categories: direct index and indirect index. Direct indicators refe…

Examples of yarn process The process flow of some commonly used spinning yarns when spun with new domestic machines is shown in Table 3-3, and the process flow of finishing is show…

According to the structure and shape of yarn Spinning yarn is composed of fabric fibers and is a continuous strip with certain mechanical properties, fineness and softness. The so-…