The effect of decentralized dye dyeing
The heat migration of decentralized dyes is not under dry heat conditions, and the dye is redistributed in the two phases of fiber and surface solvents. Instead, its inherent physical characteristics are also caused. Essence
By analyzing the effects of dyeing temperature, thermal treatment temperature and time, the sublimation of dye, surfactant and post -tidal agent, dyeing method, and thermal type on dye thermal migration, try to use the pre -dye high -temperature scheduled type, no contact below 130 ° C, no contact Several coping measures such as hot air drying and low temperature and soft drying process, as well as low -temperature and slow -speed resin finishing processes to control the influence of the heat migration of dyes to the minimum.
Polyester fabrics (pure polyester fabrics or polyester cotton, polyester adhesion and other intertwined, mixed textile fabrics) are dyed after decentralized dyes (especially high -temperature and high pressure dyeing), and dry heat treatment above 130 ° C.
For example, after dyeing heat tensor, resin roasting, etc. In the following three aspects, different degrees of changes are usually undergone, such as dyeing firmness (soap washing, friction, sun exposure) significantly decreased. Generally, the dark color decreased by 0.5 ～ 1.5; the color of the cloth surface changes to varying degrees; the pollution of the coatings or blended fabrics such as polyester cotton, polyester sticky, and other intersection or blended fabrics will increase significantly.
Why is the decentralized staining fastness poor?
Disted dyeing is mainly because polyester fiber dyeing is high -temperature and high pressure. Although the dye molecules are small, the dye molecules are not guaranteed to enter the fiber during dyeing. It is used to destroy the dye molecules that do not enter the fiber to improve the role of improvement and improve color and light.
Polyester fabrics are dyed dyed, especially in the middle and dark staining. In order to fully remove the low polymers on the surface of the fabric, the dyeing fastness is improved.
The blending fabric generally refers to the blend of the yarn from two or more ingredients, so this kind of fabric has the advantages of these two ingredients. And you can adjust the component ratio to obtain more characteristics of one of the ingredients.
The blending generally refers to the short fiber blend, that is, the two fibers of different ingredients are mixed together in the form of short fiber. For example: polyester cotton blending fabrics are usually called T/C, CVC.T/R, etc. It is woven with polyester short fiber and cotton fiber or artificial fiber blend. It has some advantages: with the appearance and feel of the whole cotton cloth, weakening the chemical fiber luster and chemical fiber feel of polyester cloth, and improve the level.
Increased coloring, because polyester cloth is high -temperature color, and the color fastness is higher than the all -cotton color fastness. Therefore, the coloring of polyester cotton -mixed woven fabrics is also improved compared to the all -cotton color fastness.
However, in order to improve the coloring of polyester cotton cloth, it is necessary to do restoration and cleaning (the so -called R/C), and the post -processing after the high temperature dyeing. Only after reducing and cleaning can the ideal prison.
The short fiber blending allows the characteristics of each composition to be evenly played. Similarly, other ingredients blended can also exert their respective advantages to meet some functional or comfortable or economical requirements. In the blend of cotton or human cotton fiber, the dyeing temperature cannot be higher than the temperature of the full cloth. Under the stimulus of strong alkali or insurance powder, the fiber strong or tearing force for polyester cotton or polyester cotton fiber cloth will be severely reduced, and it is difficult to achieve the quality of the product in the subsequent links.
After finishing the factors considering
1. Try to use the high temperature preparation before dyeing, so that the fixed tollment after dyeing can adopt gentle conditions, but it should be noted that it is lighter to the fixed, and it is easy to cause deep edge problems.
2. Try to use as much as possible below 130 ° C without contact with hot air drying, such as horizontal guide rollers dryer. Avoid drilling with baked tube.
3. Try to use the low gentle and soft baking process below 130 ° C to avoid the use of high -temperature baking technology. Try to use a low temperature and slow -speed resin collation process to avoid using high -temperature fast resin collation.