Fancy yarns can be roughly divided into the following categories according to their different processing methods: one is fancy yarns processed by ordinary spinning systems, such as chain threads, gold and silver threads, clipped threads, etc.; the other is fancy yarns processed by dyeing methods Threads such as mixed-color threads, printing threads, rainbow threads, etc.; the third is fancy threads processed by fancy twisting machines, which can be divided into overfeeding types such as spirals according to the difference and change in the feeding speed of core threads and decorative threads. Thread, braided thread, looped thread and control type such as belly thread, knot thread, etc.; fourth, special fancy thread such as chenille thread, core-spun thread, woolen thread, flocking thread, etc. There are many kinds of fancy appearance for decoration, and there are many kinds of production methods. The structure of fancy yarn consists of core yarn, decorative yarn and fixed yarn. The core yarn is strong and is the main yarn; the decorative yarn is wrapped around the core yarn with twists to form an effect; the fixed yarn is wrapped around the outer circumference of the decorative yarn in the opposite twist direction to fix the pattern, but there are also cases where the fixed yarn is not used.
The following introduces the names and composition characteristics of several common fancy yarns (threads):
1. Knot thread The decorative yarn is twisted and twisted at the same place for many times.
2. Spiral thread is made by combining and twisting two yarns with different fineness, twist and type.
3. Thick knot line The soft and thick fiber bundle is attached to the core yarn, and the outer is wrapped with fixed yarn.
4. Circle thread The decorative thread forms a closed circle and is wrapped with a fixed yarn.
5. Knotted thread The decorative yarn is wound on the core wire in a helical manner, but is thrown into a circle shape at intervals.
6. The chenille thread is sandwiched between the core thread and the horizontal decorative yarn. The end of the decorative yarn is loose with plush.
7. Diamond-shaped metal wire The outer periphery of the metal core wire (made of aluminum foil or metal sprayed material with a transparent protective film) is wound with another color, thin decorative wire and solid wire, with a diamond-shaped pattern effect.