A method for high temperature and high pressure dyeing of polyester textiles

Abstract

The invention relates to a method for dyeing a terylene textile at high temperature and under high pressure and belongs to the technical field of weaving, printing and dyeing. A dye liquor which is prepared by mixing an organic solvent with high proportion of alcohols and a small amount of water with a disperse dye is adopted to dye the terylene textile under the condition of high temperature and high pressure, the dispersing performance of the disperse dye can be better improved, the utilization rate of the dye and the dye-uptake of the dye to a fiber are increased, dyeing defects such as color tone, color spot and stripy defects are avoided, meanwhile the dyeing difficulty can be reduced, the dyeing effect is improved, and the dyeing quality is improved. The problems that dyeing is difficult, the level-dyeing property is poor, water using amount is large and pollution is serious in the traditional process of dyeing the terylene textile at high temperature and under high pressure are solved. The alcoholic organic solvent used by the method is safe, non-toxic and easy to reclaim and use, so that the water using amount is reduced, the emission of liquid waste is reduced, and the method is safe, energy-saving, clean and environment-friendly.

Description

technical field [0001] The invention relates to a method for high-temperature and high-pressure dyeing of polyester textiles, belonging to the field of textile printing and dyeing processing. Background technique [0002] The conventional polyester high-temperature and high-pressure dyeing method is carried out in a closed dyeing device with a temperature higher than 100 ° C, which belongs to a damp heat dyeing method. This method is usually performed in water. On the one hand, due to factors such as dyeing mechanical properties, heating speed during dyeing, and the performance of disperse dyes, the dispersibility of the dye will be reduced, the dye will undergo secondary aggregation, or the dye will cause color and flowering due to poor compatibility of the dye. Dyeing defects such as stains and stripes will affect the quality. On the other hand, due to the need to consume a large amount of water resources in the entire dyeing process, the dyeing has serious environmental...

AI Technical Summary

Problems solved by technology

[0004] The open magazine "Tianjin Textile Science and Technology", the second issue of 2007 titled "Application of Ultrasonic Waves in Polyester Fabric Dyeing" mentioned the method of applying ultrasonic waves to polyester fabric dyeing, although this method can indeed gather disperse dyes. The body is smashed to make the dispersion more stable and accelerate the diffusion speed of the disperse dye inside the fiber, but its shortcoming is that it does not fundamentally solve the problems such as color flowers in the polyester dyeing process, and the ultrasonic wave in the polyester dyeing process The application process is complicated, the conditions are harsh, the cost is high, and it is difficult to realize industrialization, and this method does not solve the problem of large water consumption in the dyeing process

Although the method of treating polyester with low-temperature plasma combined with co-solvent before dyeing can indeed achieve the effect of normal-pressure low-temperature dyeing and energy saving of polyester, its disadvantage is that the process is complicated, and the co-solvent used is composed of benzene Methanol, chlorobenzene, dichlorobenzene, etc., which are mostly toxic substances and difficult to recycle

Although it uses ionic liquid as a solvent to dissolve disperse dyes to dye polyester and use alcohol and other organic solvents to recover ionic liquids and dyes after dyeing, it does play a pollution-free and clean role, but its shortcomings are The cost of recovering ionic liquid is high, and the ionic liquid is relatively expensive, and reagents such as wetting agents need to be added

But its shortcoming is that this method does not greatly reduce the amount of water used in the dyeing process, and there may be phenomena such as color flowers in the dyeing process

However, its shortcoming is that the process is only based on the process technology itself, and does not solve the problem of large water consumption