How to distinguish between polyester and nylon silk: FDY DTY ATY POY

How to distinguish the spinning form of polyester and nylon:

FDY: FULLY DRAWN YARN

POY: PREORIENTTED YARN

DTY: DRAW TEXTURING YARN

ATY air deformed yarn: Invented by DuPont of the United States, the principle is to use air jet technology to entangle the tow to form irregularly twisted loops, so that the tow has a fluffy yarn.

The key equipment is an air jet deforming nozzle. When the filament enters the nozzle at a low super-feed rate, the hot air stream impacts along the running direction of the tow to disperse and eject it. The tow is fixed under the action of deformation and heat setting in the nozzle. The nozzle design should reduce the air consumption and improve the entanglement effect. The Y-shaped design can make the knots stable and the lengths of the knots are consistent. Air-jet textured yarns are not yarns with loose fiber ends, but filaments that are produced by mechanical methods with irregular loops and kinks. The looped filaments are entangled by adjacent filaments and fixed after heat treatment.

POY

Pre-oriented yarn, full name: PRE-ORIENTED YARN or PARTIALLY ORIENTED YARN. Refers to incompletely drawn chemical fiber filaments with a degree of orientation obtained by high-speed spinning between unoriented 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 network wire

Stretch deformed yarn, full name: DRAW TEXTURED YARN. It is made by using POY as raw yarn, and stretching and false twisting. Often has some elasticity and contractility.

DTY network wire

Network filaments refer to filaments in which the filaments are entangled with each other to form periodic network points in the nozzle of the network. Network processing is mostly used for the processing of POY, FDY and DTY. The low-elasticity network yarn manufactured by combining network technology and DTY technology has both the bulkiness and good elasticity of deformed yarn, and many periodic and network points, which improves the filament. The compactness eliminates several processes of textile processing and can improve the ability of the tow to pass through the water jet loom.

Generally there are low elastic silk, medium elastic silk, high elastic silk, light mesh, heavy mesh, non-mesh, low elastic light mesh, ply yarn and so on.

It is determined according to the network nozzle beauty type, the temperature of the first and second hot boxes, and the raw silk.

FDY

Fully stretched silk. Full name: FULL DRAW YARN. A synthetic fiber filament further prepared by spinning and drawing. The fiber is fully drawn and can be used directly in textile processing. The drawing effect is introduced in the spinning process, and a wound yarn with high orientation and medium crystallinity can be obtained, which is a fully drawn yarn. Conventional fully-stretched polyester and nylon yarns belong to chemical fiber filaments. FDY fabric feels smooth and soft, and is often used to weave artificial silk fabrics. It has a wide range of uses in clothing and home textiles.

ATY

The air deformed yarn was invented by DuPont of the United States. The principle is to use air jet technology to entangle the tow to form irregular twisted loops, so that the tow has a fluffy yarn. The processed textured yarn has the properties of both filament and staple fiber yarns, with strong hair feel, good hand feel, and better coverage than staple fiber yarns.

use:

It is suitable for weaving and knitting. It can be made into medium and fine fine monofilament or multifilament, or core-wool, imitation hemp, imitation cotton and so on. Coarse fineness yarn for carpet, sofa, and tapestry applications. One strand of air deformer can discharge four kinds of raw filaments. The raw filaments can be monofilaments or pre-oriented filaments. The monofilament fineness of general textured yarn is lower than 2.8DTEX (2.5D). In order to increase the number of loops on the yarn, the oil content of the raw yarn should be low.

Physical properties:

Air-textured yarn is better than the original yarn in the form of bulkiness, air permeability, gloss, and softness. The fineness is 10-15% higher than the original silk, and the boiling water shrinkage is maintained 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 entire tow.

Other chemical fiber filament types:

(1) Born yarn: undrawn yarn (conventional spinning) (UDY), semi-pre-oriented yarn (medium-speed spinning) (MOY), pre-oriented yarn (high-speed spinning) (POY), high-oriented yarn (super High-speed spinning) (HOY);

(2) Drawn yarn: low-speed drawn yarn (DY), fully drawn yarn (one-step spinning method) (FDY), fully drawn (one-step spinning method) (FOY);

(3) Textured yarn: conventional textured yarn (DY), stretched textured yarn (DTY), air textured yarn (ATY).

Identification method

By hand:

Generally, POY can be pulled longer, while FDY can be pulled 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, the remaining elongation is generally more than 40%, which is relatively stable.

Appearance:

DTY fibers are crimped, POY and FDY fibers are straight, while the strength of FDY is better, and the strength of POY is less.