What are the main methods of printing and dyeing cloth?

Fabric dyeing can be divided into four categories: clothing dyeing, fabric dyeing (mainly fabric dyeing, knitted fabric dyeing and nonwoven material dyeing), yarn dyeing (including hank dyeing, bobbin dyeing, warp beam dyeing and continuous warp dyeing) and bulk fiber dyeing.

According to the different contact modes (dyeing process) between dyes and fabrics, they can be divided into dip dyeing and pad dyeing.

1, disseminated

It is a dyeing method that the dyed fabric is immersed in the dye solution, and the dye is evenly dyed on the textile through the circulation of the dye solution and the relative movement of the dyed object. In the process of dip dyeing, dyes and dyes can be circulated at the same time or in one cycle.

Dip dyeing equipment is simple, easy to operate and wide in adaptability, especially suitable for dyeing fabrics that cannot withstand tension or rolling, such as loose fibers, yarns, knitted fabrics and woolen fabrics. Dip dyeing is intermittent production, which has low labor production efficiency and is suitable for small batch and multi-variety production.

Step 2 pad dyeing

Soak the open-width fabric in the dye solution for a short time, and then squeeze the dye solution into the gap between the fiber and the fabric structure with a press roller to remove the excess dye solution so that the dye is evenly distributed on the fabric. The fabric impregnated with dye is steamed or dried to complete the diffusion and fixation of dye on the fiber. Pad dyeing is mainly used for fabric dyeing.

Extended data

Dyeing fastness is one of the important quality indexes to measure dyed products. Fading fastness is low, and fading fastness is high. The dyeing fastness depends largely on its chemical structure. In addition, the physical state of dye on fiber, dispersion degree, combination of dye and fiber, dyeing method and process conditions also have great influence. ?

Dyeing fastness mainly includes washing fastness, rubbing fastness, sunlight fastness, perspiration fastness, ironing fastness, weather fastness, scrubbing fastness, sublimation fastness, bleaching fastness and alkali fastness. In addition, according to the special use of the product, there are fastness to seawater and fastness to smoke.