FDY fully stretched yarn
Full name: FULL DRAW YARN fully drawn yarn (called fully drawn yarn in Taiwan). Synthetic fiber filaments further produced by spinning and drawing. The fiber is fully stretched and can be used directly for textile processing.
Conventional fully drawn yarns include polyester and nylon, both of which are chemical fiber filaments. FDY fabric feels smooth and soft and is often used to weave silk-like fabrics. It has a wide range of uses in clothing and home textiles.
POY pre-oriented yarn
Full name: PRE-ORIENTED YARN or PARTIALLY ORIENTED YARN. It refers to the incompletely drawn chemical fiber filaments obtained by high-speed spinning with an orientation degree between unoriented yarns and drawn yarns. Compared with undrawn yarn, it has a certain degree of orientation and good stability, and is often used as a special yarn for drawn false twisted textured yarn (DTY).
DTY stretch textured yarn
Full name: DRAW TEXTURED YARN. It is made of POY as raw yarn, which is stretched and false-twisted. Often have a certain degree of elasticity and shrinkage.
ATY air textured yarn
Invented by DuPont in the United States, the principle is to use air jet technology to intersect the filament bundles to form irregularly twisted filament loops, making the filaments The bundle has fluffy terry-like yarn. The processed textured yarn has the properties of both filament and staple fiber yarns, with strong wooly feel, good hand feeling, and better coverage than staple fiber yarns.
Usage
Suitable for woven and knitted fabrics. Using air deformation technology, it can be made into medium or fine fineness monofilament or multifilament, or core-covered imitation wool or linen. , imitation cotton, etc., called imitation yarn textured yarn, can also be processed into coarse-density yarn used for carpets, sofas, and tapestries. There are four types of raw filaments that can be discharged from a general air texturing machine. The raw filaments can be single filaments or pre-oriented filaments. The single filament fineness of general textured yarn is less than 2.8
DTEX(2.5D). In order to increase the number of loops in the yarn, the oil content of the raw yarn should be low.
Physical Properties
The air-textured yarn is superior to the original yarn before deformation in terms of bulkiness, air permeability, gloss and softness. The fineness is 10-15% higher than that of the original filament. The boiling water shrinkage remains at about 3%, but the strength decreases by 40%, because only a small part of the monofilament is stretched, but it bears the bearing capacity of the entire filament bundle.
Other types of chemical fiber filaments
Raw yarn: undrawn yarn (conventional spinning) (UDY), semi-preoriented yarn (medium speed spinning) (MOY), Highly oriented yarn (ultra-high-speed spinning) (HOY)
Drawing yarn: low-speed drawing yarn (DY), full yarn (one-step spinning method) (FOY)
Textured yarn: conventional textured yarn (DY)
Identification method
Pull it by hand
Generally, POY can be stretched longer, while FDY can be stretched slightly less. Because POY is a pre-oriented yarn, it is not fully stretched, and the remaining elongation must be more than 50%; while FDY is a fully oriented yarn, and the remaining elongation is generally more than 40%, which is relatively stable.
In appearance
DTY fibers are curly, while POY and FDY fibers are straight. FDY has better strength, while POY has less strength.
