KR20050111982A - Industrial supercritical fluid dye apparatus - Google Patents

Abstract

An object of the present invention is to develop an industrial supercritical fluid dyeing machine for dyeing hydrophobic fibers (woven, knitted, thread, nonwoven forms of hydrophobic fibers such as PET and PP.) Under supercritical carbon dioxide. Industrial Supercritical Fluid Dyeing Machine is a dyeing tank to which a carrier to wind hydrophobic fibers is fixed, a flow converter that converts the flow of supercritical fluid to a wound fiber to make uniform and rapid dyeing, a dye bath into which dye is injected, and a super Supercritical fluid circulation circulation pump to increase the frequency of contact between dye dissolved in critical carbon dioxide and fiber, heat exchanger for heating or cooling supercritical fluid, carbon dioxide stored in storage tank and supplied as pressurized pump to dyeing equipment A high pressure dyeing device connected to a high pressure pipe is a supply device, a carbon dioxide recovery device for decompressing and cooling carbon dioxide after a dyeing process is completed, and recovering it to a storage tank with a recovery pump.

Description

Industrial supercritical fluid dye apparatus

The present invention relates to an industrial supercritical fluid dyeing machine for dyeing hydrophobic fibers in supercritical carbon dioxide.

In general, Korea was classified as a water shortage country by the United Nations Institute for International Population and Behavior (PAI) in 1995, and is expected to become a water famine country in 2025. Therefore, it is necessary to prevent water pollution and save water.

The textile industry consumes a lot of water. As water consumption increases, energy consumption and wastewater treatment costs increase. In addition, the cost used for water, wastewater treatment, and energy in the dyeing process is about 25-30% of the dyeing process cost, which leads to a rise in dyeing cost. Disperse dyes used for dyeing synthetic fibers (polyester, nylon, acetate) are not soluble in water and are dyed by dispersing the dye in water using a dispersant. Various preparations are also included in the dyeing process, most of which are hardly decomposable substances, which are becoming the main cause of water pollution. In addition, the use of water is essential for washing and drying, which leads to high consumption of water and energy, and high costs for wastewater treatment. To date, low liquid dyeing machines have been developed to reduce water use, but the water savings were not as great as expected.

The present invention is to solve the problems of the conventional water-based dyeing, supercritical fluid has a low viscosity and a high diffusion coefficient, such as gas, so the penetration into the polymer is fast, and the pressure and temperature of the dye It has the advantage of controlling solubility, so it is possible to use dyes, solvent dyes, pigments, etc. to disperse textiles and yarns of hydrophobic fibers without using surfactants or dispersants. Its purpose is to produce industrial supercritical fluid dyeers.

As a non-aqueous dyeing method that does not use water for dyeing, dyeing under supercritical carbon dioxide (CO ₂ ) is actively considered in many countries. In the supercritical fluid dyeing process, since no dyeing aids such as surfactants and dispersants, which are hardly decomposable substances, are used, almost no waste water is generated. In addition, the dye molecules dissolved in the molecular state during the supercritical fluid dye is rapidly diffused into the fiber by the high diffusion of the supercritical fluid, so the dyeing speed is high, there is an energy saving effect of about 40 to 50%.

The present invention relates to an industrial supercritical fluid dyeing machine for dyeing fabrics and yarns in supercritical carbon dioxide. The supercritical fluid dyeing machine includes a dye bath (10), a dye bath (60), a circulation pump (40), and a heat exchanger (30). Cooling the carbon dioxide stored in the dyeing device and the storage tank 77 connected to the high-pressure pipe line line 50 is supplied to the dyeing device as a pressure pump (78) or by reducing and cooling the carbon dioxide after the dyeing process is completed recovery pump ( 76) is a carbon dioxide supply and recovery device for recovering to the storage tank (77), and the carbon dioxide filled in the dyeing device with a pressurized pump (78) in the storage tank (77) is circulated by the circulation pump (40) and heat exchange When heated with a group 30, the dye dissolved in the dye bath 60 is transferred to a high diffusion coefficient in the dye solution with a low viscosity, which is a characteristic of the supercritical fluid beyond the critical point, and the supercritical fluid dyeing is performed. Go to In the chlorine wound on the carrier 14, the inside and the outside of the tainted substance are dyed in a uniform and short time by the flow converter 20 which allows the circulating supercritical fluid to flow from the inside to the outside or the outside of the tainted substance. When the dyeing process is completed, the supercritical fluid becomes carbon dioxide gas while passing through the pressure reducing valve 70, and foreign matters such as unfixed dye are filtered out from the separating device 73 and the separating filter 74 and the cooler 75. Liquefied carbon dioxide cooled in) is characterized in that the structure including a series of each means stored in the storage tank 77 by the recovery pump 76, it is characterized in that the fabric or yarn can be dyed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The structure of the supercritical fluid dyeing machine is a dyeing machine for dyeing yarn wound on a cone or a beam dyeing machine for dyeing fabrics wound around a beam according to the type of the dye (15). (Cheese Dyeing) structure can be.

1 is a configuration diagram of an industrial supercritical fluid dyeing machine according to the present invention, a dye tank means 10, a jacket 11, a quick locking device 12, a safety device 13, a spindle 14, the chlorine ( 15), actuator 16, flow conversion means 20, heat exchange means 30, circulation pump means 40, line filter means 50, dye bath means 60, pressure reducing valve means 70, carbon dioxide Supply means 76, carbon dioxide storage means 77, recovery valve 72, on-off valve 71, cyclone 73, separation filter 74, cooler 75, recovery pump 76, storage tank ( 77), the pressure pump 78, the electric controller 81, the PLC controller 82, and the pressure sensor 83.

The carrier on which the chlorine is wound is mounted on a dyeing tank, and then purged to exhaust the remaining air, and the carbon dioxide is charged and pressurized to a prescribed density. The tank 60, the heat exchange means 30, the flow conversion means 20, the dye tank means 10, the line filter means 50, the circulation pump means 40 in the order of the outside of the heat exchanger and the dye bath When the jacket's heating raises the temperature, the carbon dioxide is supercritical beyond the critical point (temperature 31.06 ° C, pressure 73.8 bar).

Figure 2 is an out-in flow chart of the supercritical fluid according to the present invention, Figure 3 is an in-out flow chart. Since supercritical carbon dioxide has a low viscosity and a high diffusion coefficient, dissolved disperse dyes, solvent dyes, and pigments easily diffuse into the fibrous polymer. As the temperature and pressure increase, the solubility of the dye increases and the dyeability is improved. At this time, the supercritical fluid flows from the inside to the outside and from the outside to the inside, as shown in Figs. 2 and 3, by increasing the contact frequency of the dye and the chlorine 15 as shown in Figs. It can contribute to shortening the dyeing time.

In general, the refining process is economical to be processed in a continuous refiner, but if the refining process is insufficient, spinning or knitting oil may be dissolved in the supercritical fluid dyeing process. Refining in supercritical fluids is the same as for dyeing but with different temperatures. Refining in the supercritical state reverses the process of supercritical dyeing, and foreign matters attached to the fibers are dissolved in the supercritical fluid. The foreign matter dissolved here is separated and removed in a depressurization process.

Carbon dioxide used as a medium in the supercritical fluid dyeer can be recovered and reused up to about 95%, and unfixed dyes can also be recovered and reused. Dye separation means is composed of a flow control valve, a pressure reducing valve means, a cyclone, a separation filter, a cooler, a recovery pump, a storage tank as shown in FIG.

Detailed description of each device

1. Structure of the dye bath means (10)

As shown in FIG. 2, the dye tank means 10, which is configured in the shape of a blood (base) or a horizontal (beam dyeing machine) according to the shape of the dye 15, is attached to the flow converting means 20, the flow of fluid Free operation to increase the frequency of contact with the chlorine 15. The work door capable of accommodating the tainted material 15 is provided with a rapid return means 12 that can be opened and closed quickly, and a safety device 13 is also installed. Outside the dyeing tank means 10 is installed in the jacket saturated steam heat medium oil, or electric heater to supply a heat source to heat or cool.

2. Flow conversion means (20)

The dye is dissolved and circulated, and the supercritical fluid is dyed from the surface where it first touches, and the dye is gradually moved to the inside, so that the surface or the inside is the same. By attaching the flow converting means 20 to an industrial supercritical fluid dyeing machine in which many salts 15 are wound, the dye solution flows from the inside of the fabric to the outside and from the outside to shorten the uniform dyeing and dyeing time. By utilizing the flow converting means 20 in a supercritical fluid dyeing machine, a simple structure in which the high pressure pipe is concentrated is reduced, and the pressure loss is reduced and the operation is easy. In the actuator 16 driven by the compressed air in the fluid flow converting means 20, when the rotation axis of the flow guide tube rotates, the salt solution moves from the outside to the inside of the salt solution 15, from the inside to the outside, as shown in FIGS. 2 and 3. Will flow. In addition, it is possible to adjust the flow rate by adjusting the opening degree of the flow converting means 20.

3. Circulating pump means 40

The number of times of contact between the dye and the salt 15 is an important factor of uniform dyeing. The supercritical fluid dyeing machine is characterized in that it further comprises a centrifugal pump (Centrifugal Pump) for circulating a large flow rate. The supercritical fluid centrifugal pump is a pump that can supply a large flow rate at a relatively low head, and canned pump is a centrifugal pump of a special structure that does not require a mechanical seal by using an electric motor in a high pressure container for use at high pressure. Use The centrifugal pump may adjust the flow rate by adjusting the rotation speed with an inverter. The flow rate is controlled by installing an electronic differential pressure gauge that measures the pressure at the outlet and inlet of the circulation pump. In the supercritical fluid that is circulated, the crumbs of fabric are collected and removed from the line filter installed at the inlet of the circulation pump to protect the circulation pump.

4. Heat exchanger (30)

The heat exchange means 30 is a spiral (single or multiple) high pressure tube is connected to the high pressure pipe, the heat exchanger 30 is a spiral (single or multiple) high pressure tube is connected to the high pressure pipe Supercritical fluid flows inside and can be heated with saturated steam, heating oil, electric heater, etc.The temperature reading is installed at the outlet of the supercritical fluid of the heat exchanger so that the remote temperature can be It is characterized by being adjusted.

5. Dye Tank (60)

A quick opening device is installed to facilitate dye transfer, and the flow converter controls the flow rate of supercritical fluid flowing through the dye bath 60 to dissolve the dye efficiently. The temperature sensor and temperature controller installed in the tank outlet pipe are used to control the temperature of the dye bath so that the dye dissolves well and a filter is installed to prevent undissolved dye particles from flowing into the supercritical fluid.

6. Dye Separation Recovery System

The dye separation apparatus is constructed as shown in FIG. When the supercritical carbon dioxide after the dyeing process is completed is depressurized below the critical point through the flow control valve (71) shutoff valve (72), the decompression valve, the carbon dioxide converted to gas rapidly loses its solubility, and thus foreign substances such as dyes precipitated into particles. Are separated from the fluid while passing through the cyclone separator (73). The carbon dioxide from which the foreign matter has been removed is again filtered through the membrane filter, which is the separation filter 74, to filter out the remaining fine particles. Particulate carbon dioxide is stored in the carbon dioxide storage tank 77 by the recovery pump 76 through the cooler (75).

7. Pressure Reducing Valve (70)

And a pressure reducing valve means as shown in FIG. The pressure reducing valve means is configured to convert the electrical signal into air pressure to regulate the secondary pressure of the pressure reducing valve. The pressure reducing valve means of the supercritical fluid has a plurality of pressure reducing patterns. A diaphragm is attached to the pressure reducing valve means to be manually adjusted, and as shown in FIG. 4, the electric controller 81 is connected to the PLC 82. Then, the electric signal indicated by the PLC 82 is transmitted to the electric controller. By converting into air pressure and supplying the diaphragm of the pressure reducing valve means, the pressure of supercritical fluid can be remotely controlled arbitrarily, and the pressure reducing pressure programmed in PLC can be arbitrarily adjusted according to the data.

As shown in Fig. 4, the indicated pressure is maintained by feeding back the value measured by the pressure sensor installed in the secondary of the pressure reducing valve means. The PLC 82 instructs the discharge and shutoff of the flow regulating valve 72 while maintaining the appropriate pressure of the supercritical fluid dyeing machine according to the instruction while maintaining the input various decompression patterns.

8. Pressurization of CO2

The carbon dioxide stored in the storage tank 77 is pressurized by the dyeing device with a pressure pump 78.

Hereinafter, the embodiment illustrating the present invention.

Example 1

In a 5-liter supercritical dyeing machine, 400g of polyester plain fabric is wound on a beam, 40g of CI Disperse Red 60 dispersion dye is filled in the dye bath, and the whole device is heated to 120 ° C and raised to 300bar by adding carbon dioxide. Stain for a minute. The K / S value representing the scattering coefficient and absorption coefficient ratio of the reflected light by projecting visible light onto the dyed fabric was the largest at the wavelength of 500∼540nm, and samples were taken at 1 m intervals from the wound fabric. As a result of measuring the change of dyeing amount according to the position of fabric, the color difference values of other samples based on the innermost fabric were 0.5 ~ 2.0%

Example 2

In a 5 liter supercritical dyeing machine, 400 g of polyester plain fabric is wound on a beam and 40 g of CI Disperse Red 60 dispersion dye is filled in a dye bath.The whole device is heated to 120 ° C. and carbon dioxide is raised to 300 bar. Stain for a minute. The K / S value representing the scattering coefficient and absorption coefficient ratio of the reflected light by projecting visible light onto the dyed fabric was the largest at the wavelength of 500∼540nm, and samples were taken at 1 m intervals from the wound fabric. As a result of measuring the change of dyeing amount according to the position of fabric, color difference values of other samples based on the innermost fabric were 0.0 ~ 1.6%.

Example 3

In a 5-liter supercritical dyeing machine, 400 g of polyester plain fabric is wound on a beam and 40 g of CI Disperse Red 60 dispersion dye is filled in a dye bath.The whole device is heated to 120 ° C. and carbon dioxide is raised to 300 bar. Stain for a minute. The K / S value representing the scattering coefficient and absorption coefficient ratio of the reflected light by projecting visible light onto the dyed fabric was the largest at the wavelength of 500∼540nm, and samples were taken at 1 m intervals from the wound fabric. As a result of measuring the change of dyeing amount according to the position of fabric, the color difference values of other samples based on the innermost fabric were 0.0 ~ 1.1%.

Example 4

In a 5 liter supercritical dyeing machine, 400 g of polyester plain fabric is wound on a beam and 40 g of CI Disperse Red 60 dispersion dye is filled in a dye bath.The whole device is heated to 120 ° C. and carbon dioxide is raised to 300 bar. Stain for a minute. The K / S value representing the scattering coefficient and absorption coefficient ratio of the reflected light by projecting visible light onto the dyed fabric was the largest at the wavelength of 500∼540nm, and samples were taken at 1 m intervals from the wound fabric. As a result of measuring the sample, the color difference value of other samples was 0.0 ~ 1.0% based on the innermost fabric.

Example 5

In a 5-liter supercritical dyeing machine, 400 g of polyester plain fabric is wound on a beam, and 20 g of CI Disperse Blue 60 dispersion dye is filled in a dye bath.The whole device is heated to 120 ° C. and carbon dioxide is raised to 300 bar. Stain for a minute. The K / S value representing the ratio of the scattering coefficient and absorption coefficient of the reflected light by projecting visible light onto the dyed fabric was the largest at wavelength 660∼680 nm. As a result of measuring each sample, the color difference values of other samples were 0.2 ~ 1.5% based on the innermost fabric.

Example 6

In a 5-liter supercritical dyeing machine, 400 g of polyester plain fabric is wound on a beam, and 20 g of CI Disperse Blue 60 dispersion dye is filled in a dye bath.The whole apparatus is heated to 120 ° C. and carbon dioxide is added to 300 bar. After the dyeing, the dyeing was performed for 90 minutes. The K / S value representing the ratio of the scattering coefficient and absorption coefficient of the reflected light by projecting visible light onto the dyed fabric was the largest at wavelength 660-680 nm. As a result of measuring each sample, the color difference values of other samples were 0.0 ~ 1.8% based on the innermost fabric.

Example 7

In a 5-liter supercritical dyeing machine, 400 g of polyester plain fabric is wound on a beam, and 20 g of CI Disperse Blue 60 dispersion dye is filled in a dye bath.The whole apparatus is heated to 120 ° C. and carbon dioxide is added to 300 bar. After raising, dyeing was performed for 180 minutes. The K / S value representing the ratio of the scattering coefficient and absorption coefficient of the reflected light by projecting visible light onto the dyed fabric was the largest at wavelength 660-680 nm. As a result of measuring each sample, the color difference values of other samples were 0.0 ~ 0.9% based on the innermost fabric.

Example 8

In a 5 liter supercritical dyeing machine, 800 g of polyester plain fabric was wound on a beam and 40 g of CI Disperse Red 60 dispersion dye was filled in a dye bath.The whole device was heated to 120 ° C. and carbon dioxide was added to 300 bar. After raising, dyeing was performed for 60 minutes. The K / S value representing the ratio of scattering and absorption coefficients of the reflected light by projecting visible light onto the dyed fabric was the highest at the wavelength of 500-540 nm. As a result of measuring each sample, the color difference values of other samples were 0.5 ~ 6.5% based on the innermost fabric.

Example 9

In a 5 liter supercritical dyeing machine, 800 g of polyester plain fabric was wound on a beam and 40 g of CI Disperse Red 60 dispersion dye was filled in a dye bath.The whole device was heated to 120 ° C. and carbon dioxide was added to 300 bar. After raising, dyeing was performed for 120 minutes. The K / S value representing the ratio of scattering and absorption coefficients of the reflected light by projecting visible light onto the dyed fabric was the highest at the wavelength of 500-540 nm. As a result of measuring each sample, the color difference values of other samples were 0.2 ~ 2.3% based on the innermost fabric.

Example 10

In a 5 liter supercritical dyeing machine, 800 g of polyester plain fabric is wound on a beam, and 80 g of CI Disperse Red 60 disperse dye is filled in a dye bath.The whole device is heated to 120 ° C. and carbon dioxide is added to 300 bar. After raising, dyeing was performed for 120 minutes. The K / S value representing the ratio of scattering and absorption coefficients of the reflected light by projecting visible light onto the dyed fabric was the highest at the wavelength of 500-540 nm. As a result of measuring each sample, the color difference values of other samples were 0.1 ~ 1.5% based on the innermost fabric.

Example 11

In a 5-liter supercritical dyeing machine, 800 g of polyester plain fabric was wound on a beam and filled with 160 g of CI Disperse Red 60 dispersion dye in a dye bath.The whole device was heated to 120 ° C. and carbon dioxide was added to 300 bar. After raising, dyeing was performed for 120 minutes. The K / S value representing the ratio of scattering and absorption coefficients of the reflected light by projecting visible light onto the dyed fabric was the highest at the wavelength of 500-540 nm. As a result of measuring each sample, the color difference values of other samples were 0.2 ~ 2.6% based on the innermost fabric.

Example 12

Using a 5L volume supercritical carbon dioxide dyeing machine, 400g of polypropylene knitted fabric (non-woven fabric) is wound around the beam in the dye bath and 2.0% owf (8.0g) of Oil Red EGN (CI Solvent Red 26), which has affinity with polypropylene fiber, ) Was added. After that, the temperature was raised to 110 ° C. at 1.0 ° C./min, and carbon dioxide was pressurized with a pressurized pump to adjust 280 bar and dyed for 20 minutes in a supercritical fluid state. The dyed fabric had the highest absorption wavelength at 520 nm and the color difference according to the wound position of the stain was less than 1, showing little difference.

Example 13

Using a supercritical carbon dioxide dyeing machine of 5L volume, 400g of polypropylene knitted fabric (non-woven fabric) is wound around the beam in the dye bath and 2.0% owf (8.0g) of Oil Blue N (CI Solvent Blue 14) having affinity with polypropylene fiber in the dye bath. ) Was added g. After that, the temperature was raised to 110 ° C. at 1.0 ° C./min, and carbon dioxide was pressurized with a pressurized pump to adjust 280 bar and dyed for 20 minutes in a supercritical fluid state. The dyed fabric had the highest absorption wavelength at 600 nm and the color difference according to the wound position of the stain was less than 1, showing little difference.

In Comparative Example for comparison with the above Example was dyed in water under the following conditions.

Comparative Example 1.

The polypropylene knitted fabric was dyed in an aqueous system (200 ml) using an IR dyeing machine. Experimental conditions were as follows. 10 g of polypropylene was placed in a pot of a dyeing machine, and Oil Red EGN (C. I. Solvent Red 26) 2.0% o.w.f. (0.2g) and a dispersant 10% o.w.f. (1.0g) were added. Thereafter, the temperature was raised to 110 ° C. at 1.0 ° C./min, followed by dyeing for 20 minutes.

Comparative Example 2.

The polypropylene knitted fabric was dyed in an aqueous system (200 ml) using an IR dyeing machine. Experimental conditions were as follows. 10 g of polypropylene knitted fabric was placed in a dyeing machine pot, and Oil Blue N (C. I. Solvent Blue 14) 2.0% o.w.f. (0.2g) and a dispersant 10% o.w.f. (1.0g) were added thereto. Thereafter, the temperature was raised to 110 ° C. at 1.0 ° C./min, followed by dyeing for 20 minutes.

In Examples 1 to 11

Since the circulation of supercritical carbon dioxide was not large, the CI Disperse Red 60 dispersion dye had a homogenousity close to the allowable at 60 minutes of dyeing time, and the uniformity of the fabric was satisfactory at 90 minutes. The case showed satisfactory leveling at 180 minutes. In the 40 liter and 130 liter dyeing machines, the circulation was greater, which resulted in the infection within 60 minutes.

In Examples 12-13

Polypropylene fiber is an extremely hydrophobic fiber that requires dyes that are much more hydrophobic than conventional disperse dyes to dye them. In this case, the hydrophobic dyes are not soluble in hot water, so the dye penetrates into the fiber. Is difficult and very difficult to obtain a uniform dyeing. In this case, when carbon dioxide in supercritical state is used, carbon dioxide has a symmetric non-polar chemical structure, so that these hydrophobic dyes dissolve better than in water, and thus, molecular molecules are highly dispersed in supercritical fluid. It is diffused into the polypropylene fiber by the sex and uniformly dyed.

From the result of Example 12-13, the deep polypropylene dyeing which was excellent in uniformity was obtained. On the other hand, in Comparative Example 1-2, although the dye has affinity for the polypropylene fiber, the solubility of the dye in the aqueous system was extremely low and the dispersion was very poor even with a general dispersant, resulting in very poor leveling.

Color fastness measurement result

The polyester fibers were dyed with C. I. Disperse Red 60 dye by supercritical dyeing and conventional wet dyeing, and the dyeing fastness of each dyed fabric was measured. Washing fastness KS K 0430 A-3, sublimation fastness KS K 0719 (180 ℃ x30sec), friction fastness KS K 0650 chronometer, daylight fastness AATCC (American Association of Textile Chemists and Colorists) 16E (63 ℃ 20 hrs ) Was measured according to the standard.

The fastness grade of the fiber dyed in supercritical carbon dioxide is similar to that of the conventional wet dyeing method, but the degree of light fastness and frictional fastness is about 0.5 grade, so that the dyeing in supercritical carbon dioxide is more excellent. Is showing.

Color fastness item Supercritical Fluid Staining Conventional wet dyeing Laundry Fading 4-5 4-5 pollution Acetate 4 4 Cotton 4-5 4-5 Nylon 4 3-4 Polyester 4-5 4-5 Acrylic 4-5 4-5 Wool 4-5 4-5 friction dry 4-5 4 Wetting 4-5 4-5 Daylight (20hrs) Fading 3-4 3 Fading 4-5 4-5 pollution Polyester One One Cotton One One

  * Each fastness value is divided into 1-5 grades, the closer the number is, the better.

Tactile Measurement Results

In the dyeing process, the uniformity and fastness of the dyed fabric are very important parts, but in the existing wet dyeing process, the fabric is dyed while contacting with the dye solution in which the dye is dissolved while rotating the fabric inside the dyeing machine. In this process, there is a problem that the fabric touches the inner wall of the dyeing machine and the texture of the fabric is degraded, and after finishing the dyeing process, a post-processing process is added to improve the feel. Reducing these processes can also reduce the time of the entire dyeing process and thus increase the economics. Experiments showed that the surface of the fabric changes when dyed with supercritical carbon dioxide. The effect of this change on the feel of the fabric was sampled and measured using the KES-FB System. The mechanical properties of the fabrics were obtained using KN-202-LDY equation, and KOSHI, NUMERI, FUKURAMI, and total hand values were obtained using KN-302-SUMMER equation. . This value is slightly higher after dyeing with supercritical carbon dioxide compared to the fabric before dyeing. As a result, it was found that the fabrics dyed with supercritical carbon dioxide slightly improved the feel. Total Hand Value is the value representing the sewing processability of the fabric after the dyeing process.

Fabric before dyeing Fabric after supercritical dyeing Remarks KOSHI 8.25 7.78 10: river NUMERI 6.09 6.61 10: river FUKURAMI 8.20 8.34 10: river T.H.V. 0.77 1.40 5: excellent

The above embodiments are provided to illustrate the present invention, and the scope of the present invention is not limited to the embodiments, and may be modified or modified by those skilled in the art within the scope of the present invention defined by the appended claims. For example, the shape and structure of the elements of each component specifically shown in the embodiments of the present invention can be modified.

As described above, in the present invention, hydrophobic dyes (dispersants, solvent dyes, pigments, etc.) under supercritical carbon dioxide are easily dissolved without a dispersant, and have a low viscosity and high diffusion carbon dioxide as a medium. Dye particles easily penetrate inside. The diffusion of dye molecules dissolved in supercritical fluid is about 100 times faster than the diffusion of dye molecules dissolved in water.

As a result of this, when dyed with supercritical carbon dioxide, it has much higher cost-saving effect than general water dyeing process. The solubility of the dye in supercritical carbon dioxide is higher at higher temperatures and pressures, and the solubility of the dye is greatly improved by adding a suitable co-solvent to the supercritical carbon dioxide.

Industrial supercritical fluid dyeing machine in the present invention was developed for the industrial use utilizing the characteristics of the supercritical fluid, not only PET, but also environmentally friendly PP fiber that can be extended to use as a home interior material, such as partitions, wallpaper, It is an eco-friendly dyeing machine that saves water and energy. Industrial supercritical fluid dyeing machines are dyed at temperatures between 200 and 300 atm and 80 to 160 ° C using carbon dioxide as a medium.

1 is a block diagram of an industrial supercritical fluid dyeing machine according to the present invention.

2 is an out-in flow chart of a supercritical fluid according to the present invention.

3 is an in-out flow chart of a supercritical fluid according to the present invention.

Figure 4 is a perspective view showing a pressure reducing device of the supercritical fluid according to the present invention.

Figure 5 is a perspective view showing a supercritical fluid dye dye separation apparatus according to the present invention.

※ Explanation of code about main part of drawing ※

10: dyeing tank 20: flow converter

30: heat exchanger 40: circulation pump

50: line filter 60: dye bath

70: pressure reducing valve

Claims (15)

Dyeing tank means in which the carrier is wound around the fabric or thread in a sealed high-pressure container; A flow converting means configured to convert the state flowing through the supercritical carbon dioxide and the dye solution in which the dye is dissolved in the dye bath means to achieve uniform dyeing and to shorten the dyeing time; Heat exchanger means for raising or cooling the temperature of the supercritical carbon dioxide; Circulation pump means configured to circulate supercritical carbon dioxide for uniform dyeing of the dyes and the salts; A line filter means configured to protect a main apparatus by collecting foreign matter contained in supercritical carbon dioxide circulated in a pipe connected to the dye bath means, the dye bath means, the heat exchanger means, and the circulation pump means; Dye bath means for storing and dissolving the dye; A pressure reducing valve means configured to be remotely controlled to lower the pressure of supercritical carbon dioxide after the dyeing ends; Cyclone separation means for collecting the non-fixed dye, which is precipitated by the reduced pressure of the gas carbon dioxide solubilized in a cyclone; Separation filter means for collecting the cyclone-separated carbon dioxide again in the Membrane Filter; Cooler means for cooling the supercritical fluid; Carbon dioxide recovery pump means further comprising sending the cooled carbon dioxide to a recovery pump storage means; Carbon dioxide storage means configured to cool and store the carbon dioxide; Carbon dioxide pressurizing pump means for supplying carbon dioxide to the dyeing tank; Industrial supercritical fluid dyeing machine, characterized in that consisting of. The method of claim 1, The dyeing tank means is an industrial supercritical fluid dyeing machine further comprises a heating / cooling means for heating or cooling from the outside. The method of claim 2, The dyeing tank means is an industrial supercritical fluid dyeing machine further comprises a rapid opening means so that the input and collection of the fabric can be made in a short time. The method of claim 1, The dyeing tank means is an industrial supercritical fluid dyeing machine further comprises a flow converting means for converting the flow direction of the supercritical fluid or to control the flow rate. The method of claim 1, The circulating pump means uses a centrifugal pump to circulate a large amount of supercritical fluid in the salted water, and the circulating pump and the driving motor are installed inside a high pressure container to further add a cannel pump having a special structure requiring no mechanical seal. Industrial supercritical fluid dyeing machine comprising a. The method of claim 1, The heat exchange means is an industrial supercritical fluid dyeing machine, characterized in that the spiral (single or multiple) high-pressure tube is composed of a connecting mechanism to the high pressure pipe. The method of claim 1 The line filter means is installed in front of the circulation pump to remove foreign substances contained in the supercritical fluid circulated and the industrial supercritical fluid dyeing machine further comprises a rapid opening mechanism. The method of claim 1 The dye tank means is a dye basket containing a dye is attached to the filter is installed in the lower so that the insoluble dye flows out of the flow control device that promotes dye dissolution by passing a portion of the supercritical carbon dioxide circulated through the dye basket And, the flow rate control device is an industrial supercritical fluid dyeing machine, characterized in that further comprises rotating to an electric motor or air pressure cylinder. The method of claim 1, The decompression valve means is characterized in that the decompression pressure indicated by the PLC to be depressurized by converting the electrical signal to the air pressure in the electric converter to apply a pressure to the diagram of the decompression valve further comprises a remote control decompressor means Supercritical Fluid Dyeing Machine. The method of claim 1 The dye separation device is collected when the supercritical carbon dioxide after the dyeing process is decompressed below the critical point in the pressure reducing valve is separated from the fluid through the cyclone, which is separated from the carbon dioxide converted into gas and precipitated is separated from the fluid Industrial supercritical fluid dyeing machine, characterized in that it further comprises. The method of claim 1 The separation filter is an industrial supercritical fluid dyeing machine, characterized in that the carbon dioxide from which the foreign matter is removed from the dye separator is again filtered through the Membrane Filter, and the remaining fine particles are further filtered. The method of claim 1, The cooler means is an industrial supercritical fluid dyeing machine for dyeing hydrophobic fibers using a hydrophobic dye, characterized in that the spiral (single or multi) high-pressure tube further comprises a connecting mechanism to the high pressure pipe. The method of claim 1, The industrial supercritical fluid dyeing machine further comprises storing carbon dioxide in a storage tank means by using the recovery pump means. The method of claim 1, The industrial supercritical fluid dyeing machine further comprises pressurizing the carbon dioxide stored in the storage means by means of the pressure pump means using the pressure pump. The method according to claim 9, Industrial supercritical fluid dyeing machine using a 4-way valve, characterized in that the carbon dioxide injection and recovery pipes and devices are configured in a simple structure.