What is the process of dyeing cloth? What is the standard of color matching after leaving the can?

The technological process of cloth dyeing, dyeing cloth, and finished cloth produced by packaging, sewing, desizing, oxygen bleaching, mercerizing, setting, dyeing, finishing, pre-shrinking, setting grey cloth (woven cloth, knitted cloth, etc.). ) fabrics dyed by professional dyeing equipment.

Scouring and bleaching remove impurities contained in natural fibers, while in the process of textile processing, various sizes, oils and polluted dirt are added. The existence of these impurities not only hinders the smooth progress of dyeing and finishing, but also affects the wearability of fabrics. The purpose of scouring and bleaching is to remove impurities from the fabric by chemical and physical and mechanical actions, so that the fabric is white, soft and breathable, which meets the wearing requirements and provides qualified semi-finished products for dyeing, printing and finishing.

Extended data

Grey cloth preparation

Grey cloth preparation includes grey cloth inspection, cloth turning (batch, package and printing) and sewing. The purpose of raw cloth inspection is to check the quality of grey cloth and solve problems in time. The inspection contents include physical indicators and appearance defects.

Fabric dyeing process

singeing

The purpose of singeing is to burn the fluff on the cloth surface, make the cloth surface smooth and beautiful, and prevent uneven printing and dyeing caused by fluff in printing and dyeing.

desize

In order to weave smoothly, textile mills often size warp yarns to improve strength and wear resistance. The size on grey cloth not only affects the water absorption of fabric, but also affects the quality of dyeing and finishing products and increases the consumption of dyeing chemicals. Therefore, the pulp should be removed before cooking. This process is called desizing.

Dye

Dyeing is a complicated process, and the dyeing process of different quality fabrics is different, such as cotton, polyester cotton, nylon, polyester, chemical fiber products, blended products and so on. Some can be pad-dyed and jig-dyed, some must be dyed at high temperature and high pressure, some must be dyed only once, and some must be colored many times.

Although dyeing can be done by a rolling mill, it is also the most difficult process, because besides the known color control, there are many unknown things in it, such as the stability of dyes at different temperatures, the control of steam, the control of rolling mill pressure and so on. These are very delicate tasks.

Long dyeing process is divided into two parts: pre-dyeing and post-fixation. According to the different kinds of dyes, the dyeing methods are different. Dyes generally have activity, stone forest, vulcanization and coating. They have their own advantages and disadvantages. Generally speaking, they depend on the desired color and cannot be replaced with each other.

afterfinish

Finishing is a textile technical project that endows clothing fabrics with wearability and aesthetics. The following are the common textile finishing types at present. The main equipment includes singeing machine, desizing machine, mercerizing machine, liquid ammonia machine, setting machine, pre-shrinking machine, calender, water washing machine, sanding machine, wool grabbing machine and coating machine.