Dyeing method based on carbon dioxide supercritical dispersion mutual dissolution

Abstract

The invention discloses a dyeing method based on carbon dioxide supercritical dispersion mutual dissolution and belongs to the technical field of dyeing. According to the dyeing method based on carbondioxide supercritical dispersion mutual dissolution, CO2 is enabled to present a fluid state in a CO2 supercritical manner, thus, the effect of dissolving a coloring agent is achieved; after dyeing,CO2 is separated from the coloring agent; on the one hand, the investment of manpower and material resources in the later stage of treating printing and dyeing wastewater is effectively avoided; on the other hand, after the separation of CO2, the coloring agent is kept, thereby reducing the waste of the coloring agent effectively and improving the use rate; and meanwhile, through cooperative use of an assistant drying channel, a positioning gaseous disc, a ventilation positioning rod and a spiral laminated rolling frame in the dyeing process, the edges of the surface pores of cloth can be guaranteed not to be prone to being rubbed due to contact with the spiral laminated rolling frame during dyeing of the cloth, so that the uniformity of dyeing is effectively guaranteed, meanwhile, a blowing effect may be realized for the dyed cloth, the separation of the fluid CO2 is further accelerated, and the dyeing efficiency is effectively improved.

Description

technical field [0001] The invention relates to the technical field of dyeing, in particular to a dyeing method based on supercritical dispersion and mutual dissolution of carbon dioxide. Background technique [0002] The state in which the pressure and temperature of a substance exceed its critical pressure (Pc) and critical temperature (Tc) at the same time, or the state in which the relative pressure (P / Pc) and relative temperature (T / Tc) of a substance are greater than 1 at the same time is called The supercritical state of the substance. There are three phases of any kind of matter—gas, liquid, and solid. The point at which the liquid and gas phases are in equilibrium is called the critical point. The temperature and pressure at the critical point are called the critical temperature and critical pressure (the critical temperature and critical pressure of water are 374°C and 21.7MPa, respectively). Different substances require different pressures and temperatures for ...

AI Technical Summary

Problems solved by technology

[0004] The existing fabric dyeing is generally to dissolve the dyeing agent in the dissolving agent, and then immerse the cloth in the dissolving agent for dyeing. However, this dyeing method usually produces a large amount of printing and dyeing wastewater, and the printing and dyeing wastewater is relatively complicated and cannot be discharged directly. In the follow-up, a lot of manpower and material resources need to be invested in wastewater treatment, resulting in increased costs, not only the workload and difficulty of the work, but also the overall dyeing efficiency of the fabric is also low

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