Test of yarn twist There are two methods for testing the twist of spinning yarn, namely the direct de-twisting method and the tension method. The tension method is also called the …

Yarn twist index and its calculation-twist direction The twist direction refers to the twisting direction of the spinning yarn. It is described based on the inclination of the fibe…

Yarn twist index and its calculation-twist width and twist coefficient If the cross-section of the spinning yarn is regarded as a circle, the angles between the fibers at different…

Yarn twist index and its calculation-twist degree and twist angle If one end of the fiber sliver is controlled and held, and the other end rotates around its own axis, a spinning y…

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…