Dye kettle for supercritical CO2 waterless dyeing, and waterless dyeing method

Abstract

The invention provides a dye kettle for supercritical CO2 waterless dyeing, and a waterless dyeing method. The dye kettle comprises a dye kettle tank body and a dye cylinder in the dye kettle tank body, and is characterized in that the dye cylinder comprises a cylindrical shell and a bottom disk; the bottom disk is arranged at the lower end of the cylindrical shell; flow dividing holes are formed in the bottom disk uniformly; at least three dye dividing channels are vertically formed in the bottom disk; partition plates vertically fixed on the bottom disk and the cylindrical shell enclose to form the dye dividing channels; a dye net for placing dye is arranged at the bottom of interior of the dye cylinder and above the bottom disk; a filtering membrane is arranged at the top of the dye cylinder; and a protective net is arranged above the filtering membrane. Different dyes in the same dye cylinder are isolated by the dye dividing channels, so that supercritical CO2 waterless dyeing equipment can dye various colors at one time, the non-uniform dyeing phenomenon in the waterless dying process is reduced, and the aims that various dyes do not pollute each other and the use amount of the dyes can be controlled are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of dyeing equipment and relates to a supercritical CO 2 Dye kettle for anhydrous dyeing, in particular one for supercritical CO 2 A dye kettle for anhydrous dyeing and an anhydrous dyeing method. Background technique [0002] The traditional dyeing process consumes a lot of water, and the discharged sewage contains a lot of chemical substances such as dyes and surfactants, which pollutes the environment. In recent years, supercritical CO 2 Waterless dyeing technology is gradually replacing traditional dyeing. This technology has the advantages of high efficiency, no pollution, and short dyeing time. It is the development direction of future dyeing technology. [0003] The technology uses supercritical CO 2 As a dyeing medium, dyeing equipment usually includes a dye kettle, a dyeing tank and a supercritical CO that connects the dye kettle and the dyeing tank. 2 Drainage tube, the dye is placed in the dye...

AI Technical Summary

Problems solved by technology

[0004] The dyeing equipment used in large-scale production usually needs to dye multiple varieties at one time, while the existing supercritical CO 2 Anhydrous dyeing equipment can only dye one color at a time, this is because different dyes are in supercritical CO 2 The solubility in is not the same, for example: at 120 degrees Celsius, the solubility of disperse red is 2.5 / mole fraction × 10 when the pressure is 24 MPa 6 , but the solubility of disperse blue at the same temperature and pressure is as high as 17.9 / mole fraction×10 6

If these two dyes are simply put in the same dye pot, the fabric will be dyed unevenly

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