CN103741523A - Solubilizing and dyeing method of supercritical CO2 fluid disperse dye - Google Patents
Solubilizing and dyeing method of supercritical CO2 fluid disperse dye Download PDFInfo
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- CN103741523A CN103741523A CN201310738685.5A CN201310738685A CN103741523A CN 103741523 A CN103741523 A CN 103741523A CN 201310738685 A CN201310738685 A CN 201310738685A CN 103741523 A CN103741523 A CN 103741523A
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Abstract
The invention is applicable to the field of a dyeing process and provides a solubilizing and dyeing method of a supercritical CO2 fluid disperse dye. According to the solubilizing and dyeing method, supercritical CO2 fluid is used for dissolving a disperse dye; a solubilizing agent is added to dye a fiber textile; meanwhile, dyeing process conditions including pressure, temperature and time and the like are optimized, and the solubility, the dyeing depth and the like of the disperse dye in the supercritical CO2 fluid are improved.
Description
Technical field
The invention belongs to field of dyeing process, relate in particular to a kind of supercritical CO
2fluid dispersion dye solubilization colouring method.
Background technology
Along with textile industry develops rapidly, the environmental pollution that process of textile production causes receives publicity day by day.Country has worked out a series of strict environmental legislations in succession, and the sewage disposal of industrial quarters and discharge etc. are supervised.According to statistics, the fabric weight of textile printing and dyeing processing is with the ratio that consumes the water yield up to 1:100~1:150, and national dyeing and printing process water consumption is estimated annual 1600000000 tons.At present, the middle water reuse ratio of the sector production process is very low, and sewage disposal and discharge account for production cost ratio, increases gradually.
Traditional dyeing course is usingd water as medium, plays the important function such as dispersion and dissolving dye and auxiliary agent, wetting and swollen fiber, seems not have water just cannot dye.But nature freshwater resources start shortage, water pollutes very serious.Now, in order to reduce water consumption and the dyeing waste of dyeing processing, people carry out large quantity research, are devoted to exploitation water saving and anhydrous staining technique.
Adopt supercritical CO
2fluid technique, utilizes reusable CO
2, under super critical condition with CO
2fluid is the medium processing of dyeing, and the integrated costs such as its energy resource consumption, lower than normal dyeing technique, have been realized non-aqueous dyeing, energy-saving and emission-reduction, therefore, and supercritical CO
2that fluid staining technique has is anhydrous, reduction of discharging, energy-conservation technical advantage, is a suitability for industrialized production new technology with development prospect.
Supercritical CO
2fluid refers to CO
2at the density fluid state of the non-condensability higher than under critical-temperature (Tc=31 ℃) and critical pressure (Pc=7.2MPa) condition, CO2 gas compression is arrived higher than more than Pc to CO more than Tc
2density can change in the scope from gas to liquid significantly continuously.Supercritical CO
2the character of fluid system, as gas, specifically has high as the density of liquid and low as the viscosity of liquid.By changing these two performance variables of temperature and pressure of system, can regulate density, the viscosity (intermolecular distance) of fluid, make it have specific physical property.
Supercritical CO
2the feature of fluid is as follows: 1, need only slight modification pressure, its density is just more big changes, and due to its low viscosity and high diffusibility, is conducive to the movement of material; 2, because the temperature difference moves greatly, can obtain higher translational speed.At present, utilize supercritical CO
2the advantage of fluid, by it, for extraction and chromatographic separated and refining material etc., such as extracting hop, natural product extraction etc., has a wide range of applications future in light industry, food, chemical industry, medicine and other fields.
As everyone knows, dyeing processing water consumption is many, electric energy and consumption of heat energy are large, the chemicals using is many, the dyestuff and the auxiliary agent that in the waste water of discharging after dyeing, contain not set, reclaim difficulty, sewage disposal difficulty, needs constantly to increase cost of water treatment in order to reach the sewage drainage standard improving gradually.Obviously, conventional colouring method will more and more be difficult to adapt to national energy-saving reduction of discharging industrial development strategy.
Summary of the invention
The object of the invention is to: a kind of supercritical CO is provided
2fluid dispersion dye solubilization colouring method, is intended to solve the problem that existing water dyeing causes shortage of water resources and pollution.
The object of the present invention is achieved like this:
A kind of supercritical CO
2fluid terylene DISPERSE DYES solubilising colouring method, passes through supercritical CO
2fluid dissolves DISPERSE DYES, and adds solubilizer, and fabric is dyeed.
Described method is specially:
By putting into dyestuff still after DISPERSE DYES filter cake and solubilizer mixing, fabric is wound on dyeing axle and puts into dyeing caldron, by booster pump, input liquid carbon dioxide, by circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabric ectonexine;
Or, DISPERSE DYES filter cake is put into dyestuff still, fabric is wound on dyeing axle and puts into dyeing caldron, by booster pump, input liquid carbon dioxide, by circulating pump, the supercritical CO 2 dyeing fluid that is dissolved with DISPERSE DYES is circulated between curling fabric ectonexine, meanwhile, at the dyestuff dyeing cycle process initial stage, solubilizer is injected to dyeing system.
Described solubilizer is the composite solubilizer of perchloroethylene and 1-2 kind secondary solvent.
Described secondary solvent is selected from oxolane, chloroform, N, dinethylformamide, carrene, dimethyl sulfoxide (DMSO), absolute ethyl alcohol, normal propyl alcohol, isobutanol, heptane, n-hexane, benzene,toluene,xylene, acetone, the formula of described composite solubilizer is: perchloroethylene 50%-80%, secondary solvent A20%-50%, secondary solvent B0%-20%.
Described DISPERSE DYES and composite solubilizer solid-liquid ratio are 1:2-1:10; When described composite solubilizer injected at the dyestuff dyeing cycle process initial stage, with the speed of flow 1ml-10ml/ minute, inject.
In dyeing course, system pressure keeps 20 MPa-30MPa, and heating systems temperature keeps 100 ℃-130 ℃, and the dyeing cycle time is 40min-120min.
Described method also comprises:
Complete dyeing cycle after the time, reduce system pressure to 3MPa-8MPa, reduce system temperature to 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, last step-down cooling, takes out DYED FABRICS.
Outstanding advantages of the present invention is: the present invention passes through supercritical CO
2fluid dissolves DISPERSE DYES, and adds solubilizer, and fabric is dyeed, and has saved a large amount of water resources, meanwhile, by optimizing the dyeing conditions such as pressure, temperature and time, improves DISPERSE DYES at supercritical CO
2solubility in fluid, dye level etc., applicable to the dyeing of polyster fibre and fabric, synthetic fiber and fabric etc.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Supercritical CO provided by the invention
2fluid dispersion dye solubilization colouring method, by carry solubilizer in dyeing course, is optimized the dyeing conditions such as pressure, temperature and time simultaneously, improves DISPERSE DYES at supercritical CO
2solubility in fluid, dye level etc., applicable to the dyeing of polyster fibre and fabric, synthetic fiber and fabric etc.
Because polyster fibre is at supercritical CO
2in fluid, expanded, when temperature surpasses its glass transition temperature, polyster fibre is in elastomeric state, and molecule segment moves, and free volume increases, and is dissolved in supercritical CO
2dISPERSE DYES in fluid can enter fibrous inside, selects to add a certain proportion of solubilizer can improve DISPERSE DYES at supercritical CO
2solubility in fluid.
The selection of solubilizer need meet following requirement: dyestuff dissolves, boiling point suitably, does not burn or burning-point is very high, it is easy to reclaim.Perchloroethylene, trichloro-ethylene and 1,1,1-trichloroethanes are proper, wherein take perchloroethylene as first-selected.But in actual applications, the dissolving of DISPERSE DYES in perchloroethylene is unsatisfactory.
The present invention adopts composite solubilizer, take perchloroethylene as main solvent, at oxolane, chloroform, N, in dinethylformamide (DMF), carrene, dimethyl sulfoxide (DMSO), absolute ethyl alcohol, normal propyl alcohol, isobutanol, heptane, n-hexane, benzene,toluene,xylene, acetone equal solvent, selecting 1-2 kind is secondary solvent, according to below with reference to formulated:
Perchloroethylene 50%-80%
Secondary solvent A 20%-50%
Secondary solvent B 0%-20%.
Supercritical CO
2in fluid dyeing, adopt a certain amount of composite solubilizer can effectively improve DISPERSE DYES solubility, be conducive to optimize dyeing condition, obtain good Color.
In the present invention, adding of solubilizer has two kinds of methods: the one, before dyeing, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, after mixing, add in dyestuff still; The 2nd, at the dyestuff dyeing cycle process initial stage, utilize a small-sized charge pump, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, with the speed of flow 1ml-10ml/ minute, solubilizer is injected to dyeing system.
Because composite solubilizer has changed supercritical CO to a certain extent
2fluid dyeing environment, comprises degrees of expansion, the vitrification point of fiber, the solubility of dyestuff, dye level, dyeing kinetics, uniform dyeing property etc., therefore needs to optimize the techniques such as pressure, temperature and time that regulate dyeing system.
Described supercritical CO
2fluid dispersion dye solubilization colouring method can comprise two kinds according to the mode that adds of solubilizer: one,, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, take pure DISPERSE DYES filter cake and composite solubilizer, put into dyestuff still after mixing; Take a certain amount of fabric and be entirely wound on dyeing axle, put into dyeing caldron; By booster pump, input liquid carbon dioxide, system pressure is increased to 20 MPa-30MPa, heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabric ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside, and the dyeing cycle time reaches 40min-120min; Two, pure DISPERSE DYES filter cake is put into dyestuff still; Take a certain amount of fabric and be entirely wound on dyeing axle, put into dyeing caldron; By booster pump, input liquid carbon dioxide, system pressure is increased to 20MPa-30MPa, heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, the supercritical CO 2 dyeing fluid that is dissolved with DISPERSE DYES is circulated between curling fabric ectonexine, simultaneously, at the dyestuff dyeing cycle process initial stage, utilize a small-sized charge pump, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, with flow 1ml-10ml/ minute speed, solubilizer is injected to dyeing system, keep pressure and temperature, the dyeing cycle time reaches 40min-120min.
Complete dyeing cycle after the time, reduce system pressure to 3MPa-8MPa, reduce system temperature to 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, last step-down cooling, takes out DYED FABRICS.
By adopting DatacolorSF6OOX colour examining spectrometer (U.S. Datacolor company), with certain wavelength, measure the K/S value of DYED FABRICS, more general supercritical CO
2the textile dyeing degree of depth of fluid dyeing, result shows that the dye level of colouring method provided by the invention promotes 5%-60%.
According to GBT3920-1997 textiles _ COLOR FASTNESS test _ colour fastness to rubbing and GBT3921-2008 textiles _ COLOR FASTNESS test _ fastness to soaping standard, the dacron of the dyeing of colouring method provided by the invention is carried out to dyefastness detection, result shows that DYED FABRICS is up to state standards, its fastness to soaping 3-5 level, colour fastness to rubbing 3-4 level.
It is below above-mentioned supercritical CO
2several specific embodiments of fluid dispersion dye solubilization colouring method.
Embodiment 1
Take after pure dispersed blue dye filter cake 1g and solubilizer 2ml-8ml mix and put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain brightly painted blue dacron, its fastness to soaping 3-5 level, colour fastness to rubbing 3-4.5 level.
Embodiment 2
Take after pure dispersed blue dye filter cake 3g and solubilizer 10ml-25ml mix and put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20 MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain the dark dense blue dacron of color, its fastness to soaping 3-4.5 level, colour fastness to rubbing 3-4 level.
Embodiment 3
Take pure dispersive red dye filter cake 1g and put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; At the dyestuff dyeing cycle process initial stage, utilize a small-sized charge pump, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, with flow 1ml-10ml/ minute speed, solubilizer is injected to dyeing system; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain brightly painted red dacron, its fastness to soaping 3-5 level, colour fastness to rubbing 3-5 level.
Embodiment 4
Take pure dispersive red dye filter cake 3g and put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; At the dyestuff dyeing cycle process initial stage, utilize a small-sized charge pump, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, with flow 1ml-10ml/ minute speed, solubilizer is injected to dyeing system; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain the dark dense red dacron of color, its fastness to soaping 3-5 level, colour fastness to rubbing 3-5 level.
Embodiment 5
Take after pure disperse yellow dye filter cake 2g and solubilizer 4ml-15ml mix and put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain brightly painted yellow dacron, its fastness to soaping 3-5 level, colour fastness to rubbing 3-4.5 level.
Embodiment 6
Take pure disperse yellow dye filter cake 3g and put into dyestuff still; Put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; At the dyestuff dyeing cycle process initial stage, utilize a small-sized charge pump, according to dyestuff and solubilizer solid-liquid ratio 1:2-1:10, with flow 1ml-10ml/ minute speed, solubilizer is injected to dyeing system; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain the dark dense yellow dacron of color, its fastness to soaping 3-5 level, colour fastness to rubbing 3-5 level.
Embodiment 7
Take after the emerald green blue dyestuff filter cake 3g of pure dispersion and solubilizer 10ml-30ml mix and put into dyestuff still; Put into dyestuff still; Take 100g fabrics of polyester and be entirely wound on dyeing axle, and put into dyeing caldron; By booster pump, input liquid carbon dioxide, make system pressure be increased to 20MPa-30MPa; Heating systems temperature reaches 100 ℃-130 ℃; By circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabrics of polyester ectonexine, is conducive to dyestuff and adsorbs equably, permeates, anchors at fibrous inside; Keep pressure 20MPa-30MPa, 100 ℃-130 ℃ of temperature, the dyeing cycle time reaches 40min-120min; Complete dyeing cycle after the time, reduce system pressure and reach 3MPa-8MPa, reduce system temperature and reach 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, step-down cooling, takes out DYED FABRICS.Obtain the blue dacron of the dark dense kingfisher of color, its fastness to soaping 3-5 level, colour fastness to rubbing 3-5 level.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a supercritical CO
2fluid dispersion dye solubilization colouring method, is characterized in that, passes through supercritical CO
2fluid dissolves DISPERSE DYES, and adds solubilizer, and fabric is dyeed.
2. supercritical CO as claimed in claim 1
2fluid dispersion dye solubilization colouring method, is characterized in that, described method is specially:
By putting into dyestuff still after DISPERSE DYES filter cake and solubilizer mixing, fabric is wound on dyeing axle and puts into dyeing caldron, by booster pump, input liquid carbon dioxide, by circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabric ectonexine;
Or, DISPERSE DYES filter cake is put into dyestuff still, fabric is wound on dyeing axle and puts into dyeing caldron, by booster pump, input liquid carbon dioxide, by circulating pump, make to be dissolved with the supercritical CO of DISPERSE DYES
2dyeing fluid circulates between curling fabric ectonexine, and at the dyestuff dyeing cycle process initial stage, solubilizer is injected to dyeing system.
3. supercritical CO as claimed in claim 1 or 2
2fluid dispersion dye solubilization colouring method, is characterized in that, described solubilizer is the composite solubilizer of perchloroethylene and 1-2 kind secondary solvent.
4. supercritical CO as claimed in claim 3
2fluid dispersion dye solubilization colouring method, it is characterized in that, described secondary solvent is selected from oxolane, chloroform, N, dinethylformamide, carrene, dimethyl sulfoxide (DMSO), absolute ethyl alcohol, normal propyl alcohol, isobutanol, heptane, n-hexane, benzene,toluene,xylene, acetone, the formula of described composite solubilizer is: perchloroethylene 50%-80%, secondary solvent A20%-50%, secondary solvent B0%-20%.
5. supercritical CO as claimed in claim 3
2fluid dispersion dye solubilization colouring method, is characterized in that, described DISPERSE DYES and composite solubilizer solid-liquid ratio are 1:2-1:10; When described composite solubilizer injected at the dyestuff dyeing cycle process initial stage, with the speed of flow 1ml-10ml/ minute, inject.
6. supercritical CO as claimed in claim 3
2fluid dispersion dye solubilization colouring method, is characterized in that, in dyeing course, system pressure keeps 20 MPa-30MPa, and heating systems temperature keeps 100 ℃-130 ℃, and the dyeing cycle time is 40min-120min.
7. supercritical CO as claimed in claim 3
2fluid dispersion dye solubilization colouring method, is characterized in that, described method also comprises:
Complete dyeing cycle after the time, reduce system pressure to 3MPa-8MPa, reduce system temperature to 20 ℃-50 ℃, by separating still, carry out dyestuff, solvent and carbon dioxide recovery; By booster pump, input a certain amount of carbon dioxide, reach certain super critical condition, the fabrics of polyester after wash cycles dyeing; Reclaim residue, carbon dioxide, last step-down cooling, takes out DYED FABRICS.
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