FDY, POY, DTY, ATY classification

Full drawn yarn: full drawn yarn (Taiwan called full drawn yarn). The synthetic fiber filament is further prepared by spinning and drawing. The fiber has been fully stretched and can be directly used in textile processing. Conventional polyester and nylon full stretch silk, all belong to chemical fiber filament. FDY fabric is smooth and soft, which is often used to weave silk like fabric. It is widely used in clothing and home textile.

▍ full name of POY pre oriented yarn: pre oriented yarn or partial oriented yarn. It refers to the incompletely stretched chemical fiber filament with the degree of orientation between the non oriented fiber and the stretched fiber obtained by high-speed spinning. Compared with the untwisted wire, it has a certain degree of orientation and good stability, and is often used as a special wire for DTY.

▍ full name of DTY tensile deformation wire: draw textured yarn. POY is used to make raw silk, which is processed by drawing and false twisting. Often has certain elasticity and contractibility.

▍ ATY air textured yarn was invented by DuPont of the United States. The principle is to use air jet technology to cross process the tow, forming irregular kinked loops, so that the tow has a fluffy loop like yarn. The textured yarn has the properties of both filament yarn and staple yarn. It has strong wool feeling, good handle and better covering than staple yarn. The utility model is suitable for shuttle weaving and knitting. By using air deformation technology, it can be made into medium and fine size monofilament or multifilament, or core covered wool like, hemp like, cotton like, etc., which is called yarn like deformation yarn, and can also be processed into coarse size yarn for carpet, sand release and tapestry purposes. Generally, there are four kinds of primary filaments on the air texturing machine. The primary filaments can be either monofilaments or pre oriented filaments. In general, the monofilament size of deformed filament is lower than 2.8 dtex (2.5D). In order to increase the yarn's on-line Terry, the oil content of the raw silk should be low. The physical air textured yarn is superior to the original silk in the aspects of fluffy, air permeability, luster and softness. The size of the filament is 10-15% higher than that of the precursor, the boiling water shrinkage is kept at about 3%, but the strength is reduced by 40%, because only a small part of the monofilament is stretched, but it bears the bearing capacity of the whole tow.

▍ other kinds of chemical fiber filaments: untwisted (conventional spinning) (udy), semi pre oriented (medium speed spinning) (Moy), highly oriented (ultra-high speed spinning) (Hoy) stretching: low speed stretching (Dy), full spinning (one-step spinning) (foy) texturing: conventional texturing (Dy)

▍ identification method: pull the ratio of POY that can be pulled again by hand Longer, less FDY. Because POY is a pre oriented wire, not fully stretched, the remaining elongation should be more than 50%; while FDY is a fully oriented wire, the remaining elongation is generally more than 40%, which is relatively stable. In appearance, DTY fiber is curly, POY and FDY fiber are straight, while FDY fiber has better strength, POY is a little weak