Chemical fiber filaments are divided into the following types: DTY: false twisted textured yarn is called DTY (D raw Tex-tu red Y a rn), also known as stretch yarn. DTY network wire: The network wire refers to the filament in the network nozzle, the filament is entangled with each other by the jet airflow, and the filament is a periodic network point. Network processing is mostly used for POY, FDY and DTY processing. The low-elastic network yarn manufactured by combining network technology and DTY technology has both the bulkiness and good elasticity of the textured yarn, as well as many periodicity and network points, which improves the filament The tightness of the machine eliminates several processes of textile processing and can improve the ability of the tow to pass through the water jet loom.

POY and FDY: The spinning speed of high-speed spinning is 3000 ~ 6000m / min, and the wound yarn with spinning speed below 4000m / min has a high degree of orientation. ien ted ya rn). If drawing is introduced during the spinning process, a wound yarn with a high degree of orientation and medium crystallinity can be obtained as a fully drawn yarn, commonly known as FDY (fu lly d raw ya rn).
DT: Stretched twisted yarn is called DT (D raw Tw is t). Using POY as the raw silk warp drafting and twisting machine, drawing mainly and giving e79fa5e98193e58685e5aeb931333332643237 a small amount of twist, you can get DT. 100D / 36F, 150D / 36F, 50D / 18F, etc., these are the expression methods of fiber specifications. The data above the diagonal line indicates the fineness of the fiber, D is the fiber denier unit "denier", that is, in the standard state, expressed in grams of 9000 meters long fiber weight, such as 100 grams is 100 denier (100D); oblique line The data below shows the number of holes used in the spinneret during spinning, and also indicates the number of single filaments that the yarn of this specification has, such as 36F, meaning that the spinneret used during spinning has 36 holes, that is, the fiber has 36 Root monofilament.
Bright, semi-dull, full-dull: In order to eliminate the gloss of the fiber, titanium dioxide (T iO 2) is added to the melt to reduce the gloss of the fiber. If TiO 2 is not added to the melt as a glossy filament (or a large glossy filament), adding 0.3% is a semi-matting filament, and greater than 0.3% is a full matting filament.
50D / 18F iron: 50 denier and 18 holes, iron pipe coiled. 75D / 36F paper: 75 denier 36 holes, paper tube roll. 150D / 36F cation: 150 denier with 36 holes, improved dyeing performance by cation.
210D / 72F fat thin silk: 210 denier 72-hole slub silk. "Fat and thin silk" is a non-standard textile vocabulary, generally understood as "slubby silk", that is, a period of thick and thin silk.
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. It is often used as a special yarn for drawing false twist textured yarn (DTY). (Generally not used for weaving)
DTY: stretch textured yarn, full name: DRAW TEXTURED YARN. It is made by using POY as raw silk, drawing and false twisting. There is often a certain degree of elasticity and contractility. (Generally, there are network and no network wire, network means network node)
FDY: Fully stretched. Full name: FULL DRAW YARN. Synthetic filaments further prepared by spinning and drawing. The fiber has been fully stretched and can be used directly in textile processing.