Colored spinning products have become more and more popular among people in recent years. Many dyed spinning companies are in the general environment. Although it is not favorable to still maintain good profits, what are the advantages of color spinning? How different is the production technology of color spinning from ordinary natural color spinning?
Advantages of color spinning
1. Unique color
The color of colored spun yarn is fiber mixed color style, which is different from the pure dyeing of natural color yarn or natural color cloth. Colored spinning raw materials contain at least one colored fiber, which is formed by fibers of different colors that are fully mixed during spinning. Therefore, fabrics composed of colored yarns can show a “spatial mixing” effect and have layered changes.
2. Low-carbon and environmentally friendly
Colored spinning reverses the traditional spinning first and then dyeing process The process is to first dye the fibers and then mix and spin them. However, most color-spun products are not entirely made of dyed fiber. 40%-50% of the raw materials of color-spun yarn are natural fibers, which are only partially dyed. So it is relatively more energy-saving and environmentally friendly.
Natural fiber has two functions as a raw material for colored spinning: one is as a color (white); the other is used for the shades of all colored spinning products adjust.
For example, for common light-colored cotton and linen gray yarn, dyed cotton generally only accounts for about 10%, that is, about 90% of the cotton fiber is undyed. All natural.
Special note, if the colored fibers in dyed textile products are chemical fibers, then its production process can be completely pollution-free. For example, some colored chemical fibers use “dope coloring” technology and add color masterbatch during the spinning process. The production process is pollution-free and zero-emission.
3. Advantages of dyeing
The traditional “spinning first and then dyeing” process, because of chemical Different characteristics lead to different fiber dyeing properties, which brings trouble to the dyeing of blended yarns and fabrics. Colored spinning adopts the process of “dye first, then spin”, which just solves the color registration problem of fiber blends of the opposite sex.
Because before spinning is mentioned in the dyeing process, no matter what kind of fiber is made: natural, regenerated, synthetic; no matter what dyeing process is required: high temperature and high pressure dyeing, or normal temperature and normal pressure dyeing; no matter what kind Dyes: reactive, dispersed, direct, reducing… can be broken down individually and then combined perfectly after dyeing. Therefore, dyeing multi-raw material blended products is no longer difficult.
4. Product development advantages
Product development of natural yarns is mainly based on changes in fiber materials and spinning technology, such as:
New functional fiber raw materials: This type of conceptual new fiber includes: bamboo fiber, soybean fiber, milk fiber, and shell fiber; the functions include UV resistance, antibacterial and deodorant, moisture wicking, fire retardant, waterproof, and anti- Oil, easy to remove, far infrared, anti-static, anti-electromagnetic radiation, etc.
New spinning technology: compact spinning and siro spinning yarns are smoother and cleaner, slub yarns have a phase-changing style, air-jet vortex spinning yarns absorb moisture and dry quickly, are not prone to fluffing and pilling, etc.
Methods and means for developing new products of natural yarns can introduce color spinning, and new variations can occur. In addition to changes in fiber and technology, color spinning also has elements of color and art, which gives it Color spinning has a wider space. Example:
1. Melting products
After consumers use the fashions made from this kind of yarn products for a period of time, they can change them into another style through simple methods.
In fact, it is a new product produced by water-soluble fiber entering color spinning. For natural color spinning, water-soluble fiber can develop hollow yarn and fluffy yarn, which have a soft hand feel. After the yarn is spun, the water-soluble fiber is dissolved away, and the yarn fabric When a gap occurs, it becomes hollow or fluffy. It is loose and soft. Color spinning is also possible. Color spinning can also develop color-changing products. The colored water-soluble fiber is a small proportion of the dyed yarn. When this small proportion is water-soluble, the color in the dyed yarn will be reduced. The ratio changes, and the yarn fabric changes color.
When consumers use this kind of clothing, as long as they are not exposed to high-temperature water, it will not change color. After using it for a period of time, they only need to soak the clothing in moderate hot water and wash it. After a certain period of time, the color changes. For example, there should be three types of orange products.It is composed of quite colored fibers, the main part is natural fiber, there is a part of yellow fiber, and a small part of red fiber. If the red part is made of water-soluble fiber, when the red is dissolved in water, the orange color will turn into light yellow.
2. Colored porcelain yarn
Capture inspiration from nature and life culture, and use it to Fibers are mixed in color to create a colored yarn with a special color style. When you see this color, you will think of handicrafts and porcelain, injecting a sense of nobility, elegance and mystery into the clothing.
3. Segment colored yarn
Another segment will appear intermittently along the length of the yarn. A kind of color, some people call it rainbow yarn. In fact, it is a small-magnification slub yarn. There are sections of colored segments and small-magnification slubs along the length of the yarn. If you dissect it, you will find that there are mainly some extra colored fibers. In fact, segmented yarn is a variation of ordinary slub yarn in color spinning.
4. Two-color colorful yarn
Siro spinning technology has entered the color spinning. With the color elements, it has evolved into two-color yarns and multi-color yarns. The main reason is that the two phase yarns fed into the spinning machine use different yarns. color.
Then extend this technology to the roving process, By changing the usual single sliver feeding method to the double feeding method of “sliver ten rovings”, another colorful style of roving siro spinning technology has evolved.
5. Colored yarn
Derived from neps, cotton Knots were originally defects that occurred during the spinning process, but dyed spinning deliberately made them larger. The large nep defects were transformed into colorful dots, and a new product of colorful dot yarn was born.
There are also silk-like colorful dot yarns, silk rain yarns, ruffle yarns, moire yarns, etc., which can be understood as: the change of colorful dots in the yarn It became messy, tiny pieces of yarn.
These methods can also be combined. For example, the dissolution technology is combined with segment color and color point technology. The segment color and color point can be changed. Orange can turn into yellow or red, colored dots can turn into colorless dots, etc. The colors can be changed endlessly. Technical problems and solutions for spinning
Colored spinning is in line with the mainstream development trend and has advantages. However, compared with natural color spinning, the production of colored spinning, especially the production of high-quality products, adopts the process of ordinary natural color spinning. Product quality cannot be guaranteed.
1. Color mixing problem
For the development of color spinning and color spinning products, if the fibers of various colors are not mixed evenly, after being made into yarn or cloth, the surface of the fabric will not have a three-dimensional, subtle, hazy color style, but will vary from piece to piece. If the color is different or horizontal, it is defective yarn or waste fabric.
In fact, natural color spinning also has color mixing technology, which is the mixing function of cleaning, combing, combining and finishing. Although the raw materials of each mark are all pure white, the colors will be slightly different. Xinjiang cotton is whiter, and cotton from inland and coastal areas is whiter. Relatively yellowish, clear Only through mixing can it dissolve into one color. However, in the season when new cotton is on the market, if the cotton is slightly improperly mixed, yellow and white yarn will be produced, because the difference between the yellow and white of new cotton and old cotton is a bit large, which shows that the general spinning process is mixed. Functionality is limited.
The color difference of color-spun raw materials is much greater than that of natural-color spun yarn. For example, the common hemp gray yarn is a blend of black cotton and white cotton. It is the difference between black and white. The yellow and white difference between cotton and new cotton is much greater, and the general mixing technology cannot meet the needs of color spinning.
2. Proofing pair. Color problem
Regular varieties of natural color yarns can be produced first and then sold. Colored yarns are different. Generally, samples must be sampled first, and the order can only be produced after the customer confirms it.
Proofing is required:
First, it must be accurate. If the color of the printed sample is not accurate with the incoming sample, the customer will not place an order; second, it must be fast. Proofing cannot take a long time. If it is slow, you will not be able to grab it. order.According to market demand, the main use of colored yarn is knitted clothing. Designers can meet people’s fashion needs by changing local colors or overall changes such as collars and sleeves of clothing. Fashion changes with time, place and season, which determines Due to the requirements of small varieties, large batches, and fast speed of colored spinning, companies that cannot respond quickly will be eliminated by the market; third, the cost of proofing must be low, and only a small amount of raw materials can be used to make yarn and cloth samples. It is necessary to be able to spin a small amount of yarn samples and weave a small amount of cloth samples from hundreds of grams, tens of grams, or even a few grams or a few fractions of grams of raw materials. If it takes tens or hundreds of kilograms of raw materials to make this sample, it is meaningless. The subsequent orders may only be tens of kilograms.
After proofing, whether the color of mass-produced products can be guaranteed to be accurate, that is, the color matching of mass-produced products, is a more important issue. For large-scale production, materials must be fed according to the color ratio determined by pre-prototype color matching, but the determined color ratio may change due to some reasons during the production process. For example, there is waste in the usual blowing and combing process. The proportions of various components in waste are not the same as the ratios of raw cotton of various marks. Even if the color ratio of each component in colored spinning is very small, Small changes can also bring big visual differences. The production of dyed yarn is different from that of natural yarn. The quality of regular varieties of natural yarn does not meet the requirements of high-end customers. You can reduce losses by lowering the selling price and selling it to mid- to low-end customers. Colored yarn is an order system, and it is very dangerous if the color is wrong. What is difficult to deal with is not only the waste of yarn, but also the customer’s responsibility for delayed orders.
3. The problem of heterochromatic yarn defects
The typical heterochromatic yarn defect is heterochromatic Dots and colorful flying flowers.
①Odd-colored spots
Odd-colored spots are mainly colored neps. Spinning definitely has to face the problem of neps and impurities. When spinning in natural color, larger knots will form defects on the cloth surface. It is necessary to remove the knots and control them through blowing, carding and combing. Within the allowed range. The knots are reflected as color points in the colored yarn. Colored yarn is composed of multi-colored fibers and is a mixed color. However, the knots in the yarn are usually the color of one of the fibers. This feature makes it more likely to appear as defects, such as: a small proportion of black cotton and a large proportion of white cotton. On the blended light-colored hemp gray gauze. Black spots can easily appear as defects; conversely, white spots can easily appear as defects on the dark hemp gray gauze made of a large proportion of black cotton and a small proportion of white cotton.
② Different-colored flying flowers yarn defects
Similarly, natural color spinning also has the problem of yarn defects of different colors, which belongs to the category of foreign fibers. Therefore, there are methods and means such as manual picking of raw cotton, blow cleaning and foreign fiber removal equipment, and winding electric cleaning and foreign fiber detection functions. However, it is unrealistic to rely on these methods to solve the problem of different-color yarn defects in colored spinning production.
Manual picking of raw cotton and clear flower foreign fiber removal equipment can eliminate foreign fiber components in natural color spinning raw materials, but different types of dyed spinning raw materials have different color components from each other, and the raw materials of each component of the same variety are also different from each other. color, it is impossible to Other types of raw materials are discarded as foreign fibers, and it is impossible to retain only one component of the same type of raw materials and discard the others; manual picking of raw cotton and blowroom foreign fiber removal equipment cannot solve the abnormalities that occur in the production process after blowing. Problems with yarn defects.
The winding electric cleaner foreign fiber detection function can detect a small amount of residual foreign fiber components in the natural yarn and remove them to ensure yarn quality. However, for colored spinning, it is unrealistic to rely solely on winding electric cleaners to remove odd-colored yarn defects. If there are no effective technical measures in the previous spinning process, a large number of odd-colored yarn defects will inevitably occur, and causes The situation where the electric clearer frequently cuts yarn defects and the winding is inefficient and paralyzed. The winding electric cleaner foreign fiber detection function can only be used as an auxiliary technical measure to remove foreign fiber yarn defects in colored spinning.
Technical solution
1. Color spinning
A very natural logic for how to achieve uniform color mixing in color spinning is to add mixing means. Usually dye spinning enterprises will add a mixing process before opening and cleaning cotton. The mixing methods include manual mixing, cotton picking machine mixing, flower machine mixing and special machine mixing.
Color blending cannot be understood as simply adding mixing means. The technological principle of color spinning and mixing is: the mixing method must not only be precise, but also gentle. This involves the particularity of dyed spinning raw materials and process. Some of the fibers and colored cotton in the dyed spinning raw materials are dyed from natural cotton. During the dyeing process, the cotton fiber has withstood acid, alkali, high temperature, mechanical action, etc., making the fiber very fragile. It is meaningless to simply pursue uniform mixing, repeatedly use the mixing function in the general spinning process, and use destructive means to achieve precise mixing at the expense of fiber spinnability.
2. Proofing and color matching method
Special process is required for color spinning proofing and color matching method, a key technical point is: how to use hundreds of grams, tens of grams, or even a few grams or fractions of a gramThe raw materials are spun into small and trace amounts of yarn samples. This is definitely not the usual spinning process, but requires special micro-sample yarn spinning technology; in addition, some special color matching and color matching process methods can be used to ensure accurate color during the color spinning production process.
3. Prevent odd-colored yarn defects
Colored yarns prevent odd-colored spots, flying flowers, etc. Methods for detecting yarn defects involve technical methods such as “double combing process” and “closed isolation”. The so-called “double combing process” is not a simple repeated application of the blowing and combing process; “closed isolation” is not simply using partition walls to separate the spinning machines that produce products of different colors. The double comb process must follow the principle of double comb process; the sealing and isolation skills must be mastered.
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