Popular Hot Sale China Product Textile 480 Denier Polyester Yarn

Ring spinning, air spinning, siro spinning and compact spinning

1. Ring spinning:

Ring spinning is the most commonly used spinning method in the market. Ring spinning refers to the spinning process in which the drawn fiber bar of the sliver or roving is introduced by rotating the ring steel ring, the bobbin winding speed is faster than that of the steel ring, and the cotton yarn is twisted into the spun yarn, which is widely used in the spinning engineering of various short fibers. For example, in general combing, combing and blending, the steel ring is twisted by the rotation of the ring driven by the bobbin through the yarn strip. At the same time, the friction of the ring makes its rotation speed slightly less than that of the bobbin. The spinning speed is high, and the form of ring spun yarn is the conical helix that most of the fibers transfer inside and outside, which makes the fibers twined inside and outside the yarn. The structure of the yarn is close and the strength is high, so it is suitable for making thread, weaving and knitting and other products.

2. Airspun:

Air spinning does not use spindle, but mainly relies on several parts such as combing roller, spinning cup, false twist device, etc. The carding roller is used to grab and feed sliver fibers. The centrifugal force generated by the high-speed rotation of the carding roller can throw the fibers out. The spinning cup is a small metal cup, and its rotation speed is more than 10 times higher than that of the comb roller. The centrifugal effect produced by this is to discharge the air in the cup outwards. According to the principle of fluid pressure, the cotton fiber enters the air flow cup, forms the fiber flow, and moves continuously along the inner wall of the cup. At this time, there is a yarn head outside the cup, which leads out and connects the fibers on the inner wall of the cup. In addition, the drilling effect of the cup with the high-speed rotation of the yarn tail is like "feeding" the cotton fiber while kneading the yarn to connect the yarn with the fibers on the inner wall of the cup. Under the spinning tension of the yarn drum, the yarn is drawn continuously and continuously to complete the air spinning Process.

3. The difference between air spinning and ring spinning:

One is new spinning technology, the other is old spinning technology. Air spinning is air spinning, while ring spinning is mechanical spinning, which is twisting by spindle, steel bell and steel ring, and drafting by roller. Air spinning is to transport fibers by air flow, and twist them by one end. Generally speaking, ring spun yarn has less hairiness, higher strength and better quality. Air spinning process is short, raw materials are short, yarn wool, count and twist can not be very high, the price is also low.

In terms of yarn structure, ring spinning is relatively close, while air spinning is relatively fluffy and rough in style, which is suitable for jeans fabric. Air spinning yarn is generally thick.

4. Air jet spinning:

Air jet spinning is a new spinning method which uses high-speed rotating air flow to twist the yarn into yarn. Air jet spinning adopts sliver feeding, four roller double short apron super large draft, which is twisted into yarn through fixed nozzle. After the sliver is led out, it is wound on the bobbin through the yarn cleaner, and directly wound into bobbin.

Air jet spinning can be used to spin 30-7.4 tex (20-80 British thread), which is suitable for pure spinning and blending of chemical fiber and cotton. Due to the special spinning mechanism of air-jet spinning, the structure and performance of air-jet spinning are obviously different from that of ring spinning, and its products have unique style.

5. Vortex spinning:

Eddy current spinning is a new spinning method, which uses fixed eddy current spinning tube instead of high-speed spinning cup. In a sense, vortex spinning is the real air spinning. The fiber strip is fed by the feeding roller, and then it is opened into single fiber by the prick roller. Under the action of air flow, it is fed into the vortex tube at high speed from the cotton conveying pipeline. Vortex tube is composed of core tube and outer tube. There are three tangential air inlets on the outer pipe, and the lower end is connected with the blower. The blower continuously draws air from the pipe, and the outside air enters the vortex pipe along the air inlet, generating vortex like air flow. When the rotating upward air flow reaches the core pipe, it merges with the fiber entering the cotton conveying pipe, forms a condensed fiber ring along the inner wall of the vortex pipe, stably revolves around the axis of the vortex pipe at high speed, and twists the fiber into yarn. From the guide hole, the yarn is continuously led out by the leading roller and wound into a bobbin. The main feature of vortex spinning is that the spinning parts with high speed rotation are omitted. Because of the use of air twisting, the problems of rotating inertia and bearing load caused by high-speed twisting parts (such as rotor spinning) and the problem of increasing spinning tension due to the air ring formed by spinning (such as ring spinning) are eliminated.

6. Siro:

Also known as a, B yarn, recently officially named as siro spinning. Siro spinning is to feed two rovings with a certain distance on the spinning frame. After drafting, the front roller will output these two single yarn whiskers, and the single yarn whiskers will have a small amount of twist due to the transmission of twist. After splicing, the single yarn will be further twisted into a yarn similar to the composite yarn, which will be wound on the bobbin.

The original design of siro spinning is used for wool spinning, which is characterized by less hairiness, high strength, good wear resistance, achieving the effect of single yarn weaving of wool yarn, so as to realize the lightweight of wool fabric. Although siro spinning has greatly improved compared with the same conventional yarn in many aspects, there is still a certain distance to achieve the real worsted single yarn nonsizing weaving. Since then, wool spinning has mostly abandoned this method. Instead, it is used in blending, such as t / C, c.v.c. etc. because it can produce the twist effect of yarn blending after dyeing and has a good feel, it is popular. Recently, it is also used to improve the hairiness problem, such as spinning some fibers prone to hairiness, such as man-made cotton, modal, Tencel, soybean fiber, and even cotton. The raw materials used in Siro yarn are produced by this method Compared with conventional ring spinning, its fabric has less hairiness, soft handle, wear resistance and good air permeability.

7. Compact spinning:

Compact spinning is a new technology of spinning on the improved ring spinning frame. The spinning mechanism is mainly as follows: a fiber agglomeration area is added in front of the traction device of the ring spinning frame, which basically eliminates the spinning twisting triangle area between the front roller and the twisting point. After the fiber sliver is output from the front opening of the front roller, it first passes through the mesh grommet of the outer jacket of the special-shaped air suction pipe, and the sliver moves on the mesh grommet. Due to the contraction and polymerization of the air flow, it gathers and rotates the sliver through the air suction slot of the special-shaped pipe, and gradually turns from a flat ribbon to a cylinder. The ends of the fiber dimension are all twisted into the yarn, so the yarn is very tight, the appearance of the yarn is bright and clean, and the hairiness is small. Compact spinning yarn has higher strength and less hairiness. In the process of knitting, it is the most difficult to produce the phenomenon of galling.

The purpose of compact spinning is to make the fibers as parallel and close as possible before twisting, which is an important criterion for high-quality compact spinning. It is the premise of its advantage to make the fiber as parallel and consistent as possible before twisting.

8. Comparison of siro spinning, compact spinning and compact Siro Spinning:

a. Siro spinning is a spinning method of spinning yarn similar to strand structure on traditional ring spinning frame. Siro spinning technology was first applied in wool spinning, and then gradually applied to cotton spinning. Siro spinning uses two rovings to feed from the bell mouth, and keeps the separation state of two whiskers in the front and back draft area. It is combined after outputting a certain length from the front jaw, and twisted by the same spindle to form Siro yarn with double strand structure characteristics. The yarn of siro spinning has special structure because of synchronous twisting in the same direction. The fibers on the surface of siro spinning are arranged orderly, the yarn structure is compact, the hairiness is less, and the anti pilling is good. Compared with the strand fabric, Siro fabric is soft and smooth. Siro spinning can be used for woven and knitted fabrics, and can also be used for high count and high density fabrics instead of strands.

b. Compact spinning is a new ring spinning technology based on traditional ring spinning. Simply speaking, it is the spinning technology to densify the fiber output after the drafting of the spinning frame, that is to say, by adding the suction device before the twisting of the sliver, by controlling the negative pressure, the loose fiber is gathered and held together, the fiber is fully straightened in the controlled area, and the twisting triangle area on the traditional spinning frame is reduced, so that the fiber can be twisted in a parallel and tight state. As the fibers in the sliver are evenly stressed and tightly packed, the yarn structure and quality are comprehensively improved, hairiness, strength, evenness, wear resistance and yarn appearance are significantly improved.

c. Compact Siro spinning is a combination of compact spinning and siro spinning, which combines the excellent characteristics and quality of the two spinning methods. Compared with the traditional ring spinning single yarn and Siro yarn, compact Siro yarn has fewer hairiness, higher strength, and more effect of siro spinning composite. It is an ideal raw material for spinning high-grade fabrics, with good performance Development prospects.