Continuous pad dyeing method for braids

Abstract

A continuous pad dyeing method for braids includes the following steps: preparing a dip dyeing box and a pad dyeing box, wherein the dip dyeing box and the pad dyeing box are filled with dye liquor, adding a leveling agent and a penetrating agent, wherein the dip dyeing box is a high-temperature box, and the pad dyeing box is a normal-temperature box; feeding a blank belt into the dip dyeing box for dip dyeing, and after the blank belt is discharged, feeding the blank belt into the dip dyeing box again, wherein dip dyeing is carried out for at least two times in the dip dyeing box; then feeding the blank belt into the pad dyeing box for pad dyeing and rolling the blank belt by a compression roller assembly, and thus enabling the dye liquor to permeate into the blank belt; then feeding the blank belt into a steam box, and steaming and fixing color with saturated steam; feeding into a water washing tank for washing to remove flooding, and then feeding into a color fixing washing tank for color fixing; and drying and shaping to finish processing. Through continuous arrangement of the dip dyeing box and the pad dyeing box, direct continuous dyeing is achieved; the number of times of dipping in dye liquor is increased through the dip dyeing box, the dipping time is prolonged, meanwhile, level dyeing and thorough dyeing are promoted, and the phenomena of white section, dyeing defects, color impure and large color difference of the front face and the back face caused by the uneven dyeing process of the braid are improved.

Description

technical field [0001] The invention relates to the field of webbing dyeing, in particular to a continuous pad dyeing method for webbing combined with exhaust dyeing technology. Background technique [0002] Continuous pad dyeing has the characteristics of short dyeing time and relatively simple process control, and is applied to large-scale ribbon dyeing production. Pad dyeing process: Pad dyeing solution→steam fixation→washing→fixation→drying, the dye molecules are preliminarily adsorbed on the surface of the fiber through rolling and pressing; after the high temperature of the steam, the fiber expands and increases the internal void , the adsorption and diffusion of dye molecules fully enter and fix the inside of the fiber. During the padding process, the time for the webbing to be dipped in the dye solution is several seconds to more than ten seconds. The dye solution must quickly penetrate into the gaps of the webbing tissue, and the webbing needs to have good wetting ...

AI Technical Summary

Problems solved by technology

Exhaust dyeing with high temperature and high pressure dyeing vat has good level dyeing and penetration dyeing performance, and the dyeing quality is higher than that of pad dyeing at room temperature. Due to the long dyeing time, low efficiency and high energy consumption, exhaust dyeing is not suitable for large-scale dyeing production of webbing

Images