Textile dyeing method
1. Coloring of the original solution
Chemical fiber (man-made fiber and synthetic fiber) manufacturing, the first to prepare spinning stock, general stock is colorless or white, made of fiber is white. But when out of some need, can add colored substances (such as color masterbatch) or spinning color, after fully mixed and then spinning, you can get a variety of colored fiber, can be short fiber, but also can be filament. The color phase of the colored fiber obtained by the original solution coloring is stable, with good color fastness and low production cost, but the batch size is large, which increases the cleaning burden of spinning equipment. As a result, it is generally difficult to produce only the more common colors, such as blue, black and group (such as military) textiles, for small batch production that changes rapidly with the market demand.
2, bulk fiber dyeing
For some effect, such as richer layering, a hazy feeling, or to reduce the color difference of the yarn, you can use loose fiber (wool, cotton, chemical fiber) dyeing. Yarns and yarns can be obtained by dyeing loose fibers and then spinning and weaving. The dyeing method is mainly dip dyeing, but also pad dyeing (continuous dyeing).
3. Tow dyeing
Both man-made and synthetic fibres are made into tow which are then cut off to form staple fibres, so that the tow can also be dyed. This method has the advantages of small batch dyeing, optional color phase designation, and saves the cleaning work of a large number of equipment in the two sections of raw liquid and spinning. Tow dyeing can be pad dyeing or dip dyeing, but it is seldom used in China.
4. Stripe dyeing
After the dyeing of bulk fiber, the spinning process should go through the whole spinning process, namely mixing, carding, doubling, roving and spinning. In this process, colored fiber will inevitably remain in the passing equipment, when changing the hue, cleaning work is very troublesome, so there is a wool dyeing, and then according to the needs of the back of the drawing roving spinning. This process has become a mature process in wool spinning. In recent years, there are also plans to transplant this process to cotton spinning to make yarns. Stripe dyeing can not only make the yarn get rich color gradation, but also minimize the "stripe flower".
5. Yarn (filament) dyeing
Yarn-dyed (weaving, knitting and weaving) products are made by first dyeing the yarn and then arranging the warp and weft yarns of different colors according to certain rules (some yarns are also used to weave the fabric of uniform color). The products have unique styles. Yarns are dyed either by dip or by pad dyeing, such as denim warp.
6. Fabric dyeing
In the current textile (whether it is woven or knitted), the fabric dyeing is the most important dyeing method. In addition to the full-width dyeing of the fabric with the same hue (color cloth), there is also local dyeing, namely dyeing into different colors, such as printing, wool tip dyeing, sandwich dyeing, etc., and local dyeing of the yarn. Fabric dyeing can be carried out in open width or rope-like manner, or by dip dyeing, pad dyeing or even gas phase transfer dyeing.
7. Garment dyeing
To adapt to the market and respond quickly, or to acquire a particular style, the fabric can be pretreated and made into clothing before being dyed (or printed). Both woven and knitted fabrics can be dyed for ready-to-wear. The garment is dyed by dipping. Generally speaking, the more advanced the dyeing process is, the lower its cost will be, and any design and color can be made up for in the later production after the occurrence of problems. The later the dyeing process, not only can reduce the addition of semi-finished products, but also can quickly respond to the market demand, but its dyeing uniformity, dye and processing technology requirements are higher.