The development of ancient and modern textile technological processes is designed according to textile raw materials. Therefore, raw materials have an important position in textile technology. The fibers used for textiles in various countries in the ancient world were natural fibers, generally three types of staple fibers: wool, hemp, and cotton. For example, the wool used in the Mediterranean region was only wool and linen; cotton used to be used in the Indian Peninsula. Of course, the modern and ancient textile methods have been greatly different. Today's The Yarn exhibition will introduce you.
Vortex spinning
The vortex-spun yarn has similar properties to ordinary ring-spun yarns, but the withdrawal speed is 20 times higher than that of ordinary ring-spun yarns, and 3 times that of rotor-spun yarns. The quality of the vortex yarn is not as good as that of the ordinary ring yarn, but when the output is increased at a higher speed, the quality of the vortex yarn is similar to that of the ordinary ring yarn.
The MVS vortex spinning machine uses two rotating nozzles to generate spiral gas, which is used to push the fed sliver around the fixed spindle to generate twist and form yarn. One end of the loose fiber is twisted around the overlapped fiber to form a true twist. The vortex yarn is similar to the ordinary ring-spun yarn. The yarn is divided into two parts, that is, the inner core and the outer layer of the yarn. The outer layer is the wrapped fiber.
The vortex spinning system is fully automatic, eliminating all rotating machinery to twist the originals. This is the biggest advantage of the vortex spinning machine. It can reduce the maintenance costs of many machines. It directly feeds the sliver produced by the draw frame and eliminates the roving process. However, there is a major problem with vortex spinning, which is the waste of raw materials during the spinning process. The fiber loss is about 5%. Although the lost fiber is mostly short fibers, it does not affect the quality of the yarn.
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Vortex spinning and rotor spinning have formed a competitive situation in the market, especially for carded yarn in the production of cotton spinning systems. The output of vortex spinning is very high, which is suitable for the production of fine yarns, and the production cost can be halved. It can be used in the combed wool spinning industry in the future.
Solo spinning
Unlike Siro spinning, solospun can be directly used for weaving without sizing. Solo spinning is another improvement of ring spinning technology. In addition to solo spinning technology, there are many The grooves are installed on the spinning frame, and the fiber bundles are output from the front to several fine wire grooves. The fiber ropes passing through these grooves are merged into one yarn, and the synthetic yarn is merged by a plurality of single yarns. Compared with Siro spinning, Siro spinning is only two grooves. The advantages of solo spinning are high yarn strength, good friction resistance and less hairiness.
Solo spinning can also be used on warp knitting machines instead of double-stranded yarns. The solo spinning mechanism is relatively simple, and it is easy to install and remove. One installer installs 1,000 solo spinning devices in three hours. The machine has many functions and strong adaptability. The solo spinning mechanism can be removed. The machine continues to run within one minute. The production cost of solo spinning is also low. The roller can be replaced every 6 months. Only the roller needs to be replaced in the whole machine. Any tool.
Soro spinning has great economic advantages in wool spinning, such as a wide range of wool fiber processing; high output and spinning efficiency; eliminating the twisting system and performing joint processing; increasing the winding output and efficiency; can be used as much as possible Thick wool fiber; Compared with double-strand production, the output time is short.
Solo spinning can produce fine count yarns for weaving light-weight fabrics. Solo spinning can be used to produce higher quality wool garments and a wider range of wool products.
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Compact spinning
The technology of compact spinning ring spinning machines at home and abroad is basically divided into two categories: one is the Swiss Rieter com4 model, which uses a perforated cage instead of the front roller to achieve the cohesion of the fiber; The other is Suessen's use of special-shaped negative pressure suction ducts and perforated rolls to form a cohesive effect on the fibers. It's Suessen-style. The two kinds of cohesive compact spinning have the same principle, but different forms, each with its own advantages and disadvantages. In the combed wool spinning industry, the compact ring spinning machine can process and produce wool combed compact yarns and blended yarns with chemical fibers. The output is increased by 10-30% compared with ordinary combed wool spinning ring yarns.
Compact ring spinning has better yarn properties and structure, less yarn hairiness, high fiber interest rate, high yarn strength, yarn surface gloss, smoothness, uniform evenness, and twist adjustment to increase yield and improve yarn Softness, compact spinning yarns and fabric appearance are greatly improved. When weaving on compact air-jet loom with compact ring-spun yarn, the weft insertion speed is increased, and the stoppage rate is reduced by 50%. The fabric is woven from compact ring-spun yarn, with a clear and shiny appearance. %, More importantly, the harmful hairiness of 3 mm and above is eliminated, and the scorching can be eliminated. The tight spinning ring combed wool spinning has a 50% reduction in breakage than the ordinary ring spun yarn. Reduced by 20%, the average end break rate is between 4-60%, and the elongation of compact spinning ring combed wool yarn is 20% better than that of ordinary ring yarn. Due to the good structure of compact-spun yarns, the number of fibers in the cross section of the yarn is reduced by 10%. Therefore, coarse wool and low-priced wool fibers can be used to produce fine wool yarns. The raw material cost per kilogram of combed wool yarn is reduced by RMB 6-9.
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Although compact spinning ring-combed wool yarn has many advantages, it also has some problems that need to be further solved. For example, the compact ring spinning machine is too expensive, and the investment cost per spindle is increased by about 50%. Even if Suessen is refitting in China's FA506, FA507 and wool ring spinning machines, the conversion cost of each spindle must reach RMB1500 or above; large maintenance of negative pressure suction hole system; the negative pressure suction hole of Rieter com4 negative pressure suction cage or Suessen aprons is easily blocked; the service life of ring and traveller is longer than ordinary ring spinning The steel ring traveler is short; the spinning joint problem of the compact ring spinning machine also needs to be improved to improve the appearance of the cloth surface.
Semi-worsted
Semi-worsted spinning is an innovative technology between worsted and carded spinning. Semi-worsted knitwear has the advantages of softness and fullness of carded spinning products, a wide range of materials, and yarns of worsted products. High support, flat fabric, delicate taste grade. The emergence of this technology has broken the boundaries of the use of traditional combed wool, carded wool, and even cotton spinning raw materials and equipment, greatly expanding the development space for woolen products. Its market space is vast and its economic benefits are very obvious. However, the technical difficulties in production still need to be explored and continuously broken.
Source: Global Textile Network
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What fabric is good for socks? Introduction to stockings fabric knowledge, walk into the store that sells socks, and a wide variety of socks will also dazzle you. In order to ensure their own market, socks manufacturers are also introducing new fabrics. Customers will also choose socks according to their preferences. But some customers are also numb and don't know enough about the fabric. The socks exhibition provides you with some fabric knowledge:
Sock fabric:
1. pure cotton fabric
Pure cotton fabrics burn faster when they come into contact with flames, and they will turn to ashes instantly. After leaving the flame, the remaining part will continue to burn, the ash left is grayish white, twist it with your hands to make it delicate and loose, and smell the burning paper smell in the air.
2. Wool fabric
The wool fabric touches the flame and burns slowly. The burnt ash is black and twisted lightly by hand. It feels crispy. Due to the protein content of wool, there is a greater odor in the air after ignition.
3. Velvet fabric
Velvet fabric Sock fabric is relatively advanced, but the socks manufacturers consider that the grades of consumers are different, and the content of velvet in each type of socks is also different. You have to know that when you use both hands to pinch the ends of the socks, the better the elasticity, the higher the velvet content. Velvet socks look smoother. They feel soft, comfortable, and especially close to the body, and they last longer.
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What fabric is good for socks
Stockings fabric
1. Nylon stockings: With its high strength, good abrasion resistance, and good elasticity, it has been beautiful for half a century.
2. Core-spun yarn: It is the more popular stocking raw material on the market. It refers to the spandex-cored yarn formed by covering or winding with spandex yarn. Features, also has the advantage of high elasticity of spandex.
3. Velvet stockings: All raw materials are made of unidirectional core-spun yarn or bidirectional core-spun yarn. Knitted socks have high elasticity, soft feel, fine transparency and better than nylon stockings. Keep warm.
4. Ultra-thin velvet socks: Weaving with high-tech ultra-fine fiber full-elastic silk that is softer than hair, with dense and delicate texture, smooth and silky touch, crystal transparency, and good breathability.
5. Combed cotton: The combing machine is used to comb the fibers during the processing of cotton fibers, and the various impurities of the fibers are almost completely removed. Fabrics made with this cotton will feel better.
6. Mercerized cotton: refers to the mercerizing process of raw cotton fibers under a certain tension in a concentrated alkali solution. The mercerized cotton fibers are more lustrous than the raw cotton fibers on the premise that the performance of other physical indicators does not change. Better degree, more comfortable feel, relatively easy to wrinkle.
Thickness points
Dan (D): refers to the fineness unit of sock fiber.
Every 9000 meters of fiber weighs as many dan (D).
At present, velvet socks are divided into 6D "thin to the end", 10D ultra-thin, 15D ultra-thin, 50D, 80D, 120D, 150D, 300D to 2000D.
Generally, ultra-thin ones can be used in summer, 50D, 80D, 120D, and 150D can be used in spring and autumn, and extra-thick and warm velvet socks can be used in winter. The thickness of 1600D is basically the same as that of ordinary cotton wool pants.
The core wire is thin.
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Purchase and maintenance of stockings:
The selection of silk socks should pay attention to whether there is drawing, whether it is skewed, and whether there are missing needles. Also, choose the right size. In the choice of color of socks, people with thin legs should choose lighter socks; conversely, people with thicker legs should choose darker socks. When wearing socks, be careful to wear them slowly. Do not pull hard. Toenails must be cut frequently. Chemical fiber socks have poor hygroscopicity and should be washed frequently. Socks should be rubbed gently when washing. Do not use hot water for scalding. Exposure to air and dry.
Wearing socks should also be selected according to climate change and different clothing colors. Dark socks should be worn in cold weather and flesh-colored socks in warm weather. Generally, high skirts should be worn when wearing skirts, and medium socks should not be worn, otherwise the calf will feel short and thick. Tights can be worn in the cold, which can keep warm and abdomen, making the figure more beautiful.
What's the difference between pantyhose's added crotch, free crotch, open file, four-sided cutout.
There are 3 types of upshift, front upshift, rear upshift, and front and rear upshift. The prices are also more expensive than normal. The biggest benefit after adding crotch is that it is suitable for people with enlarged hips. Not only is it not easy to wear the crotch of pantyhose, but it is also more loose and not stuffy. Without a crotch, the crotch will wear easily after wearing it a few times, and the panty will slip easily.
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The free crotch and open crotch are actually a concept. It is convenient for ladies to go to the toilet. Wear pantyhose first and then the inner storeroom. The crotch is designed to be free of crotch / open crotch to avoid taking off socks. This design is especially suitable for summer. In summer, the working environment of many women requires wearing skirts and stockings, while pantyhose will wrap the inner library, which is easy to sweat and breed bacteria, and is not breathable. Three / four-sided cutouts are more breathable and cooler. The common point is that they are more sexy!
Source: Global Textile Network
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