Yarn is the fiber tie, divided into three types: spun yarn, filament yarn and fancy yarn.

Spun yarn is by short fiber classics with a twist or textiles, such as rotor spinning gathered together the tie of materials; Long silk yarn is made by filament (such as silk, chemical fiber silk or rayon) merger tie together; Fancy yarn mainly for change of yarn appearance or color. Are wrapped, core, bamboo, pot-bellied, color points, waveform, braid, towels, loops, knop, feathers, toothbrush, centipede, tape, dyeing, chenille, etc.

The concept of yarn is commonly used in the following:

1, yarn twist, per unit length in the twisting number back. Has the branch of Z twist and S twist;

2, general comb (carded) - spinning process only after carding machine only at one end and textile yarn;

3, combing, spinning combing machine at both ends of the fibers used in the process of combed yarn, less impurities, fiber more straight;

4, blending - two or more different nature of the yarn fiber blend together;

5, yarn count, used to represent the index of yarn fineness, mainly has the imperial count, metric count, number, number;

6, single yarn - the product directly on spinning frame, once untwisting would disperse, referred to as "yarn;

7 - two or more than two, thread and yarn twist together, hereinafter referred to as line;

8, sewing thread, used for clothing and other sewing products generally referred to as the suture line of products;

9, new spinning - rather, a new type of spinning and traditional ring spinning method have end to free end spinning process, such as air spinning, friction spinning, yarn twist, but intertwined.