After the fine yarn is spliced and twisted, its strength unevenness will decrease. This is because the probability of weak links on the yarn body meeting during the merging process is very small. Twisting ensures good adhesion of the combined yarn. After twisting, the strands become even and the strength increases. The strength of the strands is generally greater than the sum of the strengths of the individual yarns. The strands have double twist, so they have good elasticity.
In order to prevent excessive stiffness of the strands, they are generally twisted in the opposite direction to the single yarn. At present, z-twist is generally used for fine single yarn, while s-twist is more commonly used for stranded yarn Sometimes, in order to create hidden stripes and grids in the fabric, single yarns can also be twisted with S, while stranded yarns can be twisted with Z accordingly. In order to obtain strands with high stiffness, sometimes a configuration of single yarn and strands twisted in the same direction is also used.
Generally, spliced yarn is made by twisting two or more colored yarns once or twice, and is mainly used in the production of colored fabrics. By using single yarns with different raw materials, special numbers, twist directions, twists, and colors, and twisting them together, a wide variety of twisted flower threads can be obtained. During the twisting process, if coarse and fine yarn, strong and weak twisted yarn, shiny artificial silk or metal wire are used, the color effect of the twisted flower thread will be more prominent
Generally, both stranded and spliced flower threads can be processed and made on ordinary twisting machines. According to the needs, it can be combined first and then twisted, or it can be completed in one go on the twisting machine.