According to the different dyeing process objects, the dyeing methods can be divided into garment dyeing, fabric dyeing (mainly woven fabric dyeing, knitted fabric dyeing and non-woven material dyeing), yarn dyeing (can be divided into hank dyeing, cheese dyeing, warp dyeing) Shaft yarn dyeing and continuous warp yarn dyeing) and loose fiber dyeing four categories.
Among them, fabric dyeing is the most widely used. Garment dyeing refers to the method of dyeing textile materials into garments. Yarn dyeing is mostly used for yarn-dyed fabrics and knitted fabrics, and loose fiber dyeing is mainly used for dyed textile materials.
According to the different contact methods between the dye and the fabric (dyeing process), it can be divided into two types: Exhaust dyeing and pad dyeing.
Exhaust dyeing, It is a dyeing method in which the dyed fabric is immersed in the dye liquor, and the dye is evenly dyed to the textile through the circulation of the dye liquor and the relative movement of the dyed object. During dip dyeing, the dye and the dyed material can be circulated at the same time, or in a single cycle.The dip dyeing equipment is simple, easy to operate, and has wide adaptability. It is especially suitable for dyeing loose fibers, yarns, knitted fabrics, wool fabrics and other dyes that cannot withstand tension or pressure. Dip dyeing is intermittent production, with low labor production efficiency, which is suitable for small batch and multi-variety production.
Pad dyeing, It is to immerse the open-width fabric in the dye liquor for a short time, and then press it by pressing rollers to squeeze the dye liquor into the fibers and the voids of the fabric tissue, and remove the excess dye liquor to make the dye evenly distributed on the fabric. The fabric after the dye padding is processed by steaming or baking to complete the diffusion and fixation of the dye on the fiber. Pad dyeing is mainly used for dyeing fabrics.