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How to distinguish chemical fiber filament FDY, POY, DTY, ATY...

Time : 2021-05-31 Hits : 7

I. FDY fully drawn wire:



Synthetic filament made by spinning and drawing. The fibers are sufficiently stretched to be used directly in textile warping.

Conventional polyester and nylon full stretch yarn, are chemical fiber filament. FDY fabrics feel smooth and soft, and are often used to weave silk like fabrics. It has a wide range of applications in clothing and home textiles.

2. POY pre-oriented yarn


Full name: Pre-oriented YARN or PARTIALLY ORIENTED YARN.

Refers to a synthetic filament whose orientation is between the unoriented and drawn filaments obtained by high speed spinning. Compared with the unstretched yarn, it has a certain degree of orientation and good stability, and is often used as the special yarn of DTY.

Three, DTY tensile deformation wire:


Full name: Draw Textured Yarn.

Is the use of POY to do the original wire, stretching and false twist deformation processing. Often have a certain elasticity and contraction.

Four, ATY air deformation yarn:


Dupont invented by the United States, the principle is to use the air jet method to make the air jet technology on the tow for interlacing processing, forming irregular kink coil, so that the tow has a fluffy yarn. The processed deformed yarn has the properties of both filament and staple yarn. It has strong wool feeling, good hand feeling and better covering than staple yarn.


Suitable for weaving, knitting, the use of air deformation technology, can be made into medium, fine single-filament or multifilament, or core-spun wool, linen, cotton, etc., known as artificial yarn deformation yarn, can also be processed for carpet, sand, tapestry use of coarse yarn. General air deformation machine can be discharged four kinds of primordium, primordium can be monofilament, can also be pre-oriented. The monofilament size of a typical deformed filament is less than 2.8 DTEX (2.5D). In order to increase the number of yarns, the oil content of the primary yarn should be low.

Physical properties

Air - deformed yarn is better than pre - deformed yarn in puffiness, air permeability, luster and softness. The thinness is 10-15 % higher than that of the primary filament. The boiling water shrinkage is maintained at about 3 %, but the strength decreases by 40 % because only a small part of the single filament is stretched, but it bears the bearing capacity of the whole filament bundle.

V. Types of other chemical fiber filaments:

Primary silk: undrawn (conventional spinning) (UDY), semi-preoriented (medium speed spinning) (MOY), highly oriented (ultra-high speed spinning) (HOY)

Stretched yarn: low speed drawn yarn (DY), full yarn (spinning one-step method) (Foy)

Textured yarn: conventional textured yarn (DY)

Six, discrimination method:

1, hand pull method:

In general, POY can be pulled longer, and FDY can be pulled less. Because POY is pre-oriented and not fully stretched, the remaining elongation should be more than 50%. While FDY is fully oriented filament, the remaining elongation is generally more than 40%, which is relatively stable.

2, appearance identification method:

DTY fibers are curly, POY and FDY fibers are straight, and FDY fibers have better strength, POY fibers have less strength.

Seven, the difference between filament and staple fiber:

A FILAMENT is a continuous strand of natural or chemical fibres that has not been cut. There are either single or multiple filaments.

2, Spun refers to the length of a few millimeters to dozens of millimeters of fibers, such as cotton, wool, hemp and other natural fibers, can also be SPUN by filament.

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