Technological process of dyeing and finishing of high temperature overflow dyeing machine
Dec 19, 2022
1. Preprocessing
Natural fibers contain impurities that add stains of various sizes, oils and contamination during fiber processing. The existence of these impurities will not only hinder the smooth progress of dyeing and finishing, but also affect the abrasion resistance of the fabric.
Therefore, using chemical and physical mechanical action to remove impurities in the fabric, the fabric is white and soft, with strong air permeability, showing the natural luster of the fabric that meets the requirements of clothing, and is a qualified semi-finished product, providing products for dyeing, printing and finishing.
2. Dyeing
The dye bath (dye + auxiliaries + solvent) is used for the treatment of fibers. The chemical or physicochemical combination of the dye and the fiber makes the dye in the dye bath transfer to the fiber to form an insoluble colorant. Makes the color of the cloth uniform and has good discoloration resistance.
According to the contact method (dyeing process) between the dye and the fabric, it can be divided into two types: dip dyeing and pad dyeing.
3. Printing
The print is spot dyed and requires some resistance to discoloration. It is necessary to combine dyes into color paste (dye + color paste + chemical agent), and dye the fabric according to the preset pattern to make it have a certain resistance to discoloration, thereby forming a pattern.
Printing is divided into flat screen printing, rotary screen printing, transfer printing, digital printing, etc.
4. Organize
Textile finishing is also known as finishing. Through physical, chemical or a combination of the two methods, improve the appearance, feel and internal quality of the fabric (hard finishing, soft finishing, calendering or napping, etc.) Anti-corrosion, mildew-proof, moth-proof, antibacterial, etc.), endow the fabric with special practical effect.