Specialty yarns: These are composite structures formed by twisting core yarn and wrapping yarn (decorative yarn). The surface can exhibit a textured effect similar to boucles, increasing the three-dimensionality and decorative appeal of the fabric. They are widely used in the production of decorative fabrics.
Sewing thread: This type of thread uses polyester filament as its core, with an outer layer uniformly covered with pure cotton, polyester staple fiber, or viscose fiber. It combines the high strength of the core yarn with the softness of the outer fibers, and is wound into a pagoda-shaped ball for high-speed use in industrial sewing machines.
