How to quickly and effectively identify the spinning process and yarn varieties

　How to quickly and effectively identify the spinning process and spinning yarn varieties

　　1. Burning and hand feel visual inspection method

　　It is to identify the fiber method by eye and hand touch. The principle is based on the burning characteristics of various fibers and the appearance of form, color, finish, length, thickness, strength, elasticity, feel and the situation of miscellaneous, relying on the human sensory organs to qualitatively identify the fabric fiber method. This method can quickly identify the raw materials of various fabrics, and without the help of instruments, extremely useful.

　　2. Identification of colored cotton and colored cotton

　　The difference between colored cotton and colored cotton is mainly to see the color of the fiber cross-section, if it is colored cotton, the color of the fiber cross-section from the center to the edge of the cross-section gradually fade, and colored cotton fiber cross-section fiber slices edge color dark, to the center of the color edge gradually fade, because the spinning process, the transfer of the inner and outer layers of fibers at the same time, the layer of fibers on the inner layer of fibers have obvious extrusion effect.

　　3. Ring spinning and airflow spinning to distinguish

　　Ring spinning is spun on the spinning machine and get, and spinning twist are Z twist, so with S twist for retreat, fiber can be separate.

　　Air-flow spinning is through the air flow back to form a vortex, so the spinning yarn surface fibers entangled with each other, while the internal fibers have a certain twist, but because the surface fibers are entangled with each other, so regardless of z twist or S twist untwisting, can not make the fibers separate.

　　Therefore by the above method can be distinguished from the two, and the same yarn count of spinning yarn, ring spinning strength is better than air spinning, hairiness, dry air spinning is better than ring spinning.

　　4. Ring spinning double stranded yarn and the identification of cyclo-spinning

　　Ring spinning is spun on a spinning machine and get, and single yarn spinning twist direction are Z twist, two single yarn and adopt S twist for twisting. The Sai Lo spinning by two sure spacing of the strip fed into the spinning drafting area, respectively, after drafting twisted into yarn, and two spinning yarn is "Z" twist, twisted into yarn after its twist direction or "Z" twist. So look at the twist direction of the spun yarn, you can distinguish between the two.

　　5. Air-jet spinning and vortex spinning to distinguish

　　The structure of air-jet yarn is divided into two parts: the core and the outer fiber, the core is parallel and twisted, the structure is tighter, the outer fiber is loose and irregularly wound outside the core, so the structure of air-jet yarn is looser and fuller in appearance. The core fibers are arranged in parallel with no twist, and the outer fibers are wrapped in a regular spiral on the surface of the core, and the proportion of the outer regular spiral wrapped fibers is higher, accounting for about 60% of the total fibers, so that the inner end-twisted fibers are almost completely covered, overcoming the problem of exposed core of air-jet yarn.

　　So just peel off the outer layer of fibers, see whether the inner layer of fibers are twisted and whether the outer wrapped fibers are regular to distinguish the two. And air-jet spinning is mainly spinning chemical fiber is cotton blended chemical fiber fabrics, pure chemical fiber yarn and its blended chemical fiber fabric yarn, Cotton no air-jet spinning.

　　6. The identification of combed yarn and closely spun yarn

　　Close spun yarn just look at the entire fabric surface of the spun yarn rarely have cotton knots, spun yarn strips are also very uniform, the fabric surface is very complete and clean. Other can also look at the dismantling of the spun yarn, if it is closely spun, then the whole spun yarn lint very little, also very clean, strong than combed cotton is also good. The whole cloth surface feel a little thinner than the combed cotton. So from the above three aspects we can distinguish them.

　　7. Close spun yarn and the tightly spun yarn of the complex to distinguish

　　The similarity between compact spinning and cyclo-spinning yarn is that both are in the traditional ring spinning twisting triangle increased the spacer plate and air-absorbing cohesion device, so the spinning yarn of uniform dryness, increased strength, less hairiness of the yarn.

　　The difference between compact spinning is in the spinning machine is a single feed while the Sai Lo spinning is in the spinning machine is fed into the two keep a certain distance between the roving, after drafting, by the front roller output these two single yarn whiskers, and due to the transfer of twist and the single yarn whiskers with a small amount of twist, after the combination is further twisted into a similar combined spinning yarn, winding on the tube.

　　8. Identification of Cotton bamboo yarn and linen yarn

　　Cotton bamboo knot's bamboo knot thickness, bamboo knot spacing, the length of the bamboo knot, and the yarn count of the bottom yarn are all pre-designed, so there is a definite rule. Linen spinning is carried out in the case of semi-degumming, and the length of hemp fiber is poorly regulated, the length varies, so the spun yarn, the stem is severely uneven, the yarn count of the longitudinal presents irregular thickness of different bamboo knots, bamboo knot spacing is also not regular. So just start from these characteristics, you can distinguish them.

　　9. Identification of cotton yarn and human cotton yarn

　　1. Cotton yarn does not spark when it burns, while human cotton yarn will spark and burn faster than cotton yarn.

　　2、When cotton yarn is wetted with water, its strength will not drop, but when human cotton yarn is wetted with water, its strength drops greatly, and the wet strength is much smaller than the dry strength.

　　3, put cotton yarn and human cotton yarn into a cup of water at the same time, because the permeability of human cotton yarn is better than cotton yarn, so human cotton yarn sinks into the bottom of the cup first, while cotton yarn is a little slower (but it is worth noting that cotton yarn that has just been pretreated and not washed with desizing lye will also sink into the water immediately after wetting due to the permeability of alkali)

　　With the above three methods, we can distinguish cotton yarn from human cotton yarn.

　　10. Identification of silk and wool yarn

　　Silk and wool yarn have burnt feather odor when burning, so we can't distinguish them at this point, so we can only distinguish them by looking at the number of single fibers, silk through the practice of dyeing, and then take off part of the silk glue, so the two filaments are separated, if it is 1/22D/20D silk filament number will become 14 ~ 16, other from the finish of the luster we can also quickly to distinguish. Other from the spinnable count, 1/22D/20D almost 500 counts of yarn, such a yarn count only embedded spinning yarn can reach, so from the thickness of the raw material we can also be distinguished.

　　11. Identification of cotton yarn and bamboo fiber yarn

　　1. Cotton yarn does not spark when it burns, while bamboo yarn burns and burns faster than cotton yarn.

　　2. When cotton yarn is wetted with water, its strength will not drop, while bamboo fiber yarn is wetted with water, its strength will drop, only about 60% of dry strength.

　　3, Put cotton yarn and bamboo fiber yarn into a cup of water at the same time, because bamboo fiber yarn has better permeability than cotton yarn, so bamboo fiber yarn sinks into the bottom of the cup first, while cotton yarn is a little slower (but it is worth noting that cotton yarn which has just been pretreated and not washed with desizing lye will also sink into the water immediately after wetting due to the permeability of alkali).

　　4, the cross-sectional shape under the electron microscope is different.

　　12. Identification of polyester-cotton yarn and polyester-viscose yarn

　　The two spinning yarn untwist, and then look at the length of the single fiber; polyester cotton yarn regardless of polyester staple fiber or cotton fiber is usually cotton type, its polyester cut off length is 38mm, and cotton even with long staple cotton its fiber length in 23mm ~ 45mm. and polyester viscose yarn if cotton type yarn, its cut off length are in 38mm, medium length yarn its cut off length in 51mm ~ 76mm, wool type yarn its We can distinguish them by the length of fiber.

　　13. Identification of three kinds of Tencel

　　TSG100 is a kind of Tencel that can be raw fibrillated, if the finished TSG100 Tencel spun yarn has a very fine fleece on the surface.

　　TSA100 is a kind of tencel that cannot be fibrillated, and there is no fuzz on the surface of TSA100 tencel spun yarn if it is finished.

　　TSLF100 is a kind of tencel that can be between the original fiber and can not original fibrillation, if finishing into the finished product of TSLF100 tencel spinning yarn surface has hair feathers, and many hair feathers in the whole spinning yarn is not evenly distributed.

　　14. Polyester and nylon identification

　　1, polyester regardless of cationic modified polyester, and regardless of the draft and low elastic yarn, the flame color is light red when burning, with aromatic odor.

　　2, nylon regardless of draft and low elastic yarn, burning odor, white or light-colored nylon burning flame color is light blue, while black or dark nylon burning flame color is light yellow.

　　15. There are finished silk, diamond silk how to identify

　　The finish of the silk and diamond silk is almost the same, the surface of the silk is very bright.

　　In the spinning of the finished silk and diamond silk added TiO2 finishing agent content is not the same, and diamond silk almost no TiO2 finishing agent, so poor spinnability, so the single fiber of the silk thread is very little, so to distinguish between the two is to count the number of single fibers to identify them.

　　16. Identification of general polyester and cationic polyester

　　If both are raw silk, then we just need to look at the finish, cationic polyester finish between the semi-finished and finished, belongs to the sub-finished type, so from this point we can distinguish them. If the finished product, then the dark color is cationic polyester (except color woven fabrics), remove a few silk threads down, pull a few, the poor strength is cationic polyester.

　　17. Identification of low-stretch and empty change silk

　　Low-stretch yarn (twisted need to untwist) need not use too much force to pull, the fiber always show curl state. In the process of deformation finishing, the fibers are deformed by the swirl of the airflow in the nozzle, so that the fibers and fibers are tangled and twisted, so you can pull hard, but never make the tangled fibers separate from each other. We can use this to distinguish between the two types of yarn.

　　18. Identification of polyester, nylon, polyacrylonitrile fiber

　　1, polyester, regardless of cationic modified polyester, regardless of the draft and low elastic yarn, the flame color is light red when burning, aromatic odor.

　　2, nylon, regardless of draft and low elastic yarn, burning odor, white or light-colored nylon burning flame color is light blue, while black or dark nylon burning flame color is light yellow.

　　3, polyacrylonitrile fiber, regardless of draft and low stretch yarn, burning odor, the flame color is light red when burning.

　　The use of this can be used to identify the three fibers.

　　19. Cotton yarn and linen cotton, linen viscose yarn identification

　　Cotton yarn if not bamboo yarn, regardless of ring spinning, or airflow spinning, the entire spinning line is basically uniform in the stem. And flax spinning is carried out in the case of semi-degumming, and hemp fiber single fiber is shorter, so as long as the spinning line contains flax, regardless of its blend of chemical fiber fabric than how much, spun out of the yarn, the stem is always uneven, the longitudinal branch of yarn showing irregular thickness of different bamboo knots, bamboo knot spacing is not regular. So as long as from this feature, you can distinguish them.