What are the processes of yarn? Which craft of cloth is better?

Different staple fiber spinning technology has different effects on the physical properties and appearance of the yarn, and even affects the characteristics of the final product.

1) Different spinning methods have different effects on the yarn structure, the structure of staple fiber yarn is different from that of filament, first of all, the arrangement of the outer and inner fibers of the yarn, and the external structure includes the appearance and surface structure of the yarn. Such as: the arrangement of fibers on the surface of the yarn; hairiness of yarn; coefficient of friction of yarn; characteristics of yarn; Abrasion resistance and other surface properties of yarn.

2) The internal structure of the yarn is mainly the entire cross-section of the fiber body and the longitudinal arrangement of the yarn, the fiber orientation, elongation, etc

The internal structure of displacement and twist includes: yarn strength; degree of fiber mixing; flexural strength; compressibility; Resilience (tendency to knot).

The above explanation of the meaning of the structure is not necessarily complete, but it provides the complexity of the yarn's properties.

Spinning process. This paragraph.

In order to obtain a concept of the effect of the spinning process on the yarn structure, 3DTEX, 38 mm viscose staple fibers were used and test spinning in 5 different spinning process systems.

1) Traditional ring spinning process; (2) Compact spinning ring spinning process; (3) Double nozzle (MTS) pseudo-entangled spinning process; (4) Vortex spinning (MVS) spinning; (5) Rotor spinning.

1) The external structure of the yarn as mentioned above can be seen on a scanning electron microscope. Application of microelectronic photography**: including rotor spinning, air-jet spinning, vortex spinning, ordinary ring spinning and compact ring spinning five kinds, from the ** can see the external fiber orientation of the yarn produced by five processes, among which more fibers form yarn in the external structure of the compact ring yarn, almost all fibers are formed in the yarn body, improve the short fiber yarn, the twist structure of the yarn is seen very clearly, and one end of the fiber is pulled into the yarn body along the length of the yarn, and the orientation of the tight ring yarn is the best

2) Traditional ring spinning, under the same twist conditions, the surface of traditional ring spinning is disordered, a large number of fiber tail ends are not twisted into the yarn body, and a single fiber stretches out of the yarn body, which may be caused by the steel ring, steel traveler or yarn guide.

3) Vortex spinning, similar to ring spinning, the fibers are well arranged in the yarn body, and when the spinning speed is 350 minutes, the wrapped fibers are finely spiraled. The twist is basically the same as the ring yarn, and the actual twist of the yarn is basically the same as the calculated twist. The ratio of wrapped fibers to untwisted core fibers accounts for a high percentage, almost all of which cover the core fibers, so the appearance of the vortex yarn is basically similar to that of ring yarn, and the outer wrapped fibers form a true twist together with the untwisted core.

4) Double nozzle false twist yarn, double nozzle false twist yarn, and vortex yarn is different in essence, the wrapped fiber of double nozzle jet yarn accounts for only 6% of all fibers 8 About 90 of the fibers are stretched without twist, it can be clearly seen that the wrapping tightness of the wrapped fiber to the yarn core is larger than that of the vortex yarn.

5) Rotor spinning, regardless of whether the rotor yarn belongs to the category of true twist, but the fiber arrangement on the rotor yarn is disordered, and the fiber in the middle of the yarn shows no clear spiral in the Z and S directions, and the fiber is straight. It can be clearly seen that the wrapped yarn is not tangled, which is the advantage of rotor yarn and the basis of rotor yarn characteristics.

Yarn can be divided according to the process, divided into pure spinning yarn, blended yarn, new fiber yarn, special process yarn, colored yarn, sewing yarn, functional yarn. One of the pure spun yarns.

The surface includes two categories: cotton yarn and chemical fiber; Blended yarn contains polyester, nitrile, linen, cotton, plush, linen, and silk; The new fiber yarn includes high-performance fibers, cellulose fibers, and natural fibers; The cloth made by these different processes is different, to say which process of cloth is good, it mainly depends on what kind of clothing your cloth is used for, according to different uses of the cloth required is different, the requirements of the cloth are different, the process requirements of the yarn are also different. As.

If you want to see the details, you can go to the mesh to find out.

There are air spinning and ring spinning.

Ring spinning is better.

sand line process; There are ring spinning, air spinning, air-jet spinning, friction spinning, electrostatic spinning, compact spinning, etc., the influence of various spinning methods on the properties of yarn: specific to see the use.

1.Compact spinning.

Compact spinning is to add a bundling area in front of the roller in front of the traditional ring spinning machine, so that the fibers have a process of sorting and bunching before being twisted, reducing or even eliminating the twisting triangle, so that the fibers are gathered tightly, arranged evenly and straightly, and the edge fibers are reduced, so that the hairiness of the yarn is reduced, and the dryness and strength of the yarn strips are improved. At present, there are two ways to tightly spin aggregate fibers:

One is to aggregate the fibers through the air flow;

The second is to gather fibers mechanically.

In the process of tight spinning and twisting into yarn, the fiber is more straight and parallel, the structure is good, the internal and external transfer of the fiber is reduced, the surface fiber and the edge fiber on both sides are controlled, and the fiber head end is easy to be twisted into the yarn body, so the tight spinning strip is evenly dry, the strength is improved, the hairiness is reduced, and the friction resistance is improved. In addition, in the subsequent processing, singeing can be omitted, waxing can be omitted, fabric pilling can be reduced, the efficiency of the loom can be improved, and the printing and dyeing effect of the fabric can be improved.

The transformation of compact spinning technology in ring spinning machines is more complex and more demanding, so its transformation and production costs are high. At the same time, compact spinning has high requirements for the dryness and uniformity of roving. Compact spinning products are compact, uniform and glossy, suitable for traditional high-grade fabrics, but cannot replace ordinary ring spinning, such as yarn for fleecing fabrics and yarn for some special style products still need to be completed on ordinary spinning frames.

2.Sirospun

Cello spinning is a spinning method that spins yarns with a similar strand structure on a conventional ring spinning machine. Siro spinning technology was first applied to wool spinning, and then gradually applied to cotton spinning. Cello spinning is to keep a certain distance between the two rovings in parallel feeding into the same drafting area of the spinning frame, after drafting, by the front roller output two single yarn whiskers, the two single yarn whiskers each have a small amount of twisting, and finally converge together, further twisted into similar strands of siro yarn.

The essence of siro spinning is to twist the strands of two single yarn whiskers in the same direction, so in the twisting section of the single yarn whiskers, the transfer of fibers is not as strong as that of ordinary spinning yarn twisting, the fibers are straighter, the spatial spiral fibers are less, the fiber head has fewer extensions, and the yarn surface is smooth. When the two whiskers converge for the same direction twisting, the twist of the strand twisting increases rapidly, the fiber helix and inclination increase, and the strand strength increases, because its twisting mechanism is different from the general double-strand thread, so the siro spinning fiber is arranged neatly, the hairiness is less, the structure is compact, and the luster and wear resistance are better.

Two rovings can be different fibers, or the same fiber or two fibers with the same blended ratio, the fabric woven with this yarn is dyed with a single fiber or two fibers with different colors and double dyed, the fabric can present a plump and lively style, with a strong three-dimensional sense, so it is widely used in many high-end textiles.

The following problems should be paid attention to in the production of siro spinning on the ring spinning frame: Due to the use of double roving feeding, the roving frame should be transformed to increase capacity, and the roving adopts a smaller package, and the roving quantity is reduced to a certain extent; In addition, a double-groove yarn guide is required.

To produce yarns with a similar strand style and a thinner yarn style, in addition to a small quantity for roving, the spinning frame should use a large drafting multiple.

The detailed steps of the processing process of the cloth are divided into:

1.Yarn drawing: The yarn is extracted by the chemical fiber through the process, and the thickness of the yarn is determined, and the factory generally buys the yarn cake directly (this process is not completed in the factory);

2.Warping: concentrate the scattered yarn cakes on the plate head, and the number of the plate head is related to the texture of the yarn;

3.Yarn merging: merge the yarns of two or more pan heads into one disc head, for example, 600d yarn can be formed by merging two 300d yarns;

4.Sizing: Sizing water after yarn merging to make the yarn stronger;

5.Warp separation: the warp yarn is staggered up and down by the machine, so that the weft yarn can pass through;

6.Weaving: there are two kinds of knitted fabrics and woven fabrics;

7.Shaping: After weaving, the grey cloth is made, and then the cloth is dried and shaped by high temperature;

8.Bleaching and dyeing: dyeing the fabric, dyeing according to customer needs, it should be noted that the current domestic bleaching and dyeing technology, in each tank of bleaching and dyeing of the cloth will have the phenomenon of color difference, the industry has become a vat, this is because of the difference in the allocation of dyeing materials, temperature control, dyeing time and other differences in bleaching and dyeing;

9.After tidying up: post-processing of dyed fabrics, known to the special needs of sufficient fabrics;

Woven fabric refers to the fabric that is interwoven with yarn as warp and weft and interwoven according to various fabric structures. The earliest electric loom was a wooden shuttle to drive the weft yarn to interweave with the warp yarn.

The law of the warp and weft yarns floating and sinking interweaving in the woven fabric becomes the fabric structure. The appearance and function of the fabric are also different depending on the fabric structure, which is mainly divided into three types: plain weave change weave, twill weave change weave, and satin weave change weave.

Because of the different structures, the appearance style and function of the three kinds of fabrics are also different.