Test apparatus for dyeing

Abstract

To provide a dyeing test device capable of dyeing with excellent reproducibility in dyeing treatment by a supercritical fluid.SOLUTION: A dyeing vessel 10 of a dyeing test device comprises: a vessel body 11 having a communication port formed in a lateral surface for circulating a dyeing medium and opening at an upper end; a storing body 18 to store dye disposed in the vessel body 11; a cylindrical support body 14 detachably disposed so as to be spaced at a prescribed interval from an inner peripheral surface of the vessel body 11; and a liquid permeable inner cylindrical body 15 holding a cloth piece for dyeing around it. An outer cylindrical body 16 and the inner cylindrical body 15 are fitted at a prescribed interval to a lower side of the support body 14. An agitator 31 is disposed so as to face an upper side of the inner cylindrical body 15 inside the support body 14.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a test apparatus for dyeing fabrics and the like using a supercritical fluid as a dyeing medium.

Background Art

[0002] The dyeing technique using a supercritical fluid as a dyeing medium is a dyeing technique that does not use water at all. By changing the state of the supercritical fluid, it can be circulated and reused, and is attracting attention as a technique with extremely low environmental impact.

[0003] For example, in the case of carbon dioxide (CO2), a dye is dissolved in a supercritical fluid set in a supercritical or subcritical state, and the supercritical fluid is passed through a fabric placed in a dyeing tank for dyeing. After the dyeing is completed, the supercritical fluid is released to take out the fabric in a dry state, and the CO2 that has returned to a gas can be recovered as a liquid by pressurizing and compressing it and reused.

[0004] As a processing apparatus for dyeing using such a supercritical fluid for reuse, for example, Patent Document 1 describes an apparatus in which a supercritical fluid is supplied to an autoclave for dyeing through a pump, a heat exchanger, and a saturator, and the supercritical fluid is recovered from the autoclave for dyeing through a pressure relief valve, a condenser, a liquid reservoir, and a pump and circulated.

[0005] When performing a dyeing process, a dyeing test is usually carried out in advance and then the dyeing process is carried out based on the test results. For example, in Patent Document 2, a dyeing tank is arranged in a constant temperature air bath tank, a stirrer, a sample fabric, and a dye sandwiched between filters are placed in the dyeing tank and sealed, the air in the dyeing tank is replaced with carbon dioxide, and then the temperature in the constant temperature air bath tank is heated to a predetermined temperature and liquid carbon dioxide is supplied to the dyeing tank and pressurized, and the inside of the dyeing tank is set to a supercritical state by controlling to a predetermined temperature and a predetermined pressure to perform a dyeing test.

[0006] In Patent Document 3, in order to perform a dyeing test on a plurality of samples simultaneously, samples and dyes are introduced into a plurality of dyeing cups with different volumes, filled with a dyeing medium from a medium gas source, and rotated while performing heating control in a state separated from the medium gas source to perform a dyeing test simultaneously.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0008] In the dyeing process using a supercritical fluid as a dyeing medium, as described in Patent Document 1, the dyeing medium can be circulated and used, but since it is necessary to perform the treatment in a closed system, when performing a dyeing test, as described in Patent Document 2, one sample is performed under one test condition, which is not as efficient as conventional aqueous dyeing.

[0009] Therefore, as described in Patent Document 3, it has been proposed to perform a dyeing test on a plurality of samples simultaneously, but it is difficult to perform the test under the same conditions as a mass-production dyeing apparatus, and there is a problem that the reproducibility of dyeing is low.

[0010]

Means for Solving the Problems

[0011] ​The dyeing test apparatus according to the present invention includes a dyeing section for accommodating a dye and a cloth piece for dyeing, a supply section for supplying a dyeing medium into the dyeing section, an adjustment section for adjusting the temperature and pressure of the dyeing medium filled in the dyeing section, and a control section for controlling the adjustment section to set the dyeing medium in the dyeing section to a predetermined temperature and a predetermined pressure and perform a dyeing process in a supercritical fluid state. In the dyeing test apparatus, the dyeing section includes a container body having a communication port formed on a side surface and connected to the supply section via a pipeline to allow the dyeing medium to flow therethrough and having an upper side opened, a container for accommodating the dye disposed in the container body, a sealing body for detachably sealing the opening of the container body, a cylindrical support body detachably disposed at a predetermined interval from the inner peripheral surface of the container body, an outer cylindrical body detachably attached to the lower side of the support body at a predetermined interval from the inner peripheral surface of the container body, a liquid-permeable inner cylindrical body detachably attached to the lower side of the support body at a predetermined interval inside the outer cylindrical body and holding the cloth piece around it, and a stirring body attached to the lower side of the sealing body and disposed opposite to the upper side of the inner cylindrical body inside the support body. Further, the inner cylindrical body is formed of a mesh-like cylindrical body, and a pedestal member disposed at the bottom of the container body is detachably attached to the lower end. Further, the support body is provided with a plurality of protrusions on the outer peripheral surface, and by the protrusions abutting against the inner peripheral surface of the container body, it is disposed at a predetermined interval from the inner peripheral surface of the container body. Further, the sealing body supports the rotation axis of the stirring body, and a drive mechanism for rotationally driving the stirring body is provided above the sealing body.

Effect of the Invention

[0012] By having the above-described configuration, the present invention can stir a dyeing medium composed of a supercritical fluid sealed in the container body by the stirring body, and uniformly diffuse and flow the dye contained in the container body while dissolving it.

[0013] That is, the dye dissolved in the supercritical fluid by the stirring operation of the stirrer becomes a dye solution and flows into the inner cylinder attached to the lower side. It passes through the inner cylinder and diffuses between the inner cylinder and the outer cylinder, and the dye solution uniformly contacts the entire piece of cloth for dyeing held around the inner cylinder and passes from the inside to the outside.

[0014] Also, the dye solution diffused between the inner cylinder and the outer cylinder flows upward between the lower side of the outer cylinder and the container body due to the flow generated by the stirring operation, and a convective-like flow is generated between the center (inside the inner cylinder) and the periphery (outside the outer cylinder) of the container body, so that the dye solution uniformly diffuses into the container body.

[0015] Moreover, by the reverse stirring operation of the stirrer, the dye solution can be made to flow in the direction of flowing out of the inner cylinder. Due to such a flow, the dye solution can be passed through the piece of cloth for dyeing from the outside to the inside, and the dye solution can uniformly contact both sides of the piece of cloth for dyeing.

[0016] Therefore, it becomes possible to flow the dye solution uniformly diffused in a sealed state and uniformly contact the entire piece of cloth for dyeing, and a dyeing process with good reproducibility can be performed. And since the dye solution sealed in the container body can be stirred, uniformly diffused, and flowed, a plurality of dyeing parts can be connected to the supply part to perform individual dyeing processes, and it is possible to improve efficiency by simultaneously testing a plurality of samples under different conditions.

[0017] Also, by detachably attaching a sealing body to the container body, the support body detachably supported inside can be taken out. Since the outer cylinder and the inner cylinder are detachably attached to the support body, the outer cylinder and the inner cylinder can be removed and easily disassembled. The set of the dye and the piece of cloth for dyeing is easy, and the inside of the container can be easily cleaned, greatly improving the convenience of the operation.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0019] Hereinafter, the present invention will be described in detail based on the embodiments shown in the accompanying drawings. FIG. 1 is a schematic configuration diagram of a dyeing test apparatus according to the present invention.

[0020] The dyeing test apparatus 1 includes a dyeing container 10 for accommodating a dye and a piece of cloth for dyeing, and a supply pump 50 for supplying a dyeing medium into the dyeing container 10. Between the common supply pipe 51 and the common discharge pipe 52 connected to the supply pump 50, the dyeing container 10 is connected through a piped pipeline. Therefore, by attaching a plurality of dyeing containers 10 between the common supply pipe 51 and the common discharge pipe 52, it is possible to perform dyeing processes under different conditions simultaneously.

[0021] Examples of the cloth piece used in the test include those obtained by cutting dyeable materials such as woven fabrics, non-woven fabrics, fiber bundles, and yarns into test shapes. However, when conducting a processing test for improving the function of the material by a supercritical fluid, other materials can also be used.

[0022] An introduction valve 20 is connected to the introduction pipeline between the common supply pipe 51 and the dyeing container 10, and a discharge adjustment valve 21 and a discharge valve 22 are connected in series to the discharge pipeline between the dyeing container 10 and the common discharge pipe 52. Further, a pressure sensor 23 and a safety valve 24 are connected in series to a pipeline branched on the dyeing container 10 side of the introduction valve 20 in the introduction pipeline, and the discharge side of the safety valve 24 is connected to the common discharge pipe 52.

[0023] Around the dyeing container 10, a heater 25 is attached to cover the entire container with a heat insulating material (indicated by a dotted line). Around the portion where the discharge adjustment valve 21 and the discharge valve 22 are connected in series, a heater 26 is attached to cover the entire portion from the discharge side pipeline of the dyeing container 10 to the attachment location of the heater 26 with a heat insulating material (indicated by a dotted line).

[0024] Above the dyeing container 10, a stirring device 30 for stirring the dyeing medium filled inside the container is provided. The stirring device 30 includes a stirring body 31 built into the dyeing container 10 and a drive mechanism 32 for operating the stirring body 31.

[0025] The dyeing container 10 includes a container body 11 with an open upper side, a sealing body 12 for sealing the opening of the container body 11, and a lid body 13 formed to cover the sealing body 12. By screwing the lid body 13 around the opening of the container body 11, the sealing body 12 is pressed against the opening and sealed.

[0026] At the center of the sealing body 12, the rotating shaft of the stirring body 31 is pivotally supported. By removing the lid body 13 from the container body 11, removing the sealing body 12 from the opening, and moving it upward together with the stirring device 30, the opening of the container body 11 is exposed.

[0027] The pressure of the dyeing medium filled in the dyeing container 10 is adjusted to a predetermined pressure by operating the high-pressure dyeing medium supplied from the supply pump 50 and the introduction valve 20, the discharge adjustment valve 21, and the discharge valve 22. In this example, by adjusting the discharge adjustment valve 21 connected to the discharge side of the dyeing container 10, the pressure of the dyeing medium filled in the dyeing container 10 can be adjusted. Therefore, even when a plurality of dyeing containers are connected to a common supply pump, the pressure can be adjusted individually.

[0028] Also, the temperature of the dyeing medium in the dyeing container 10 is adjusted to a predetermined temperature by heating the heater 25 provided around it. In this example, the adjustment unit for adjusting the temperature and pressure of the dyeing medium filled in the dyeing section is realized by devices related to such pressure and temperature adjustments.

[0029] Further, the control unit 100 controls the pressure and temperature of the dyeing medium in the dyeing container 10 based on detection signals from various sensors such as a pressure sensor 23 that detects the pressure in the pipeline corresponding to the pressure of the dyeing medium in the dyeing container 10, a temperature sensor (not shown) that detects the temperature in the dyeing container 10, and a temperature sensor (not shown) that detects the heating temperature of the heaters 25 and 26, so as to perform a dyeing process on the dyeing medium in the dyeing unit 10 in a supercritical fluid state.

[0030] When supplying high-pressure carbon dioxide liquid from the supply unit into the dyeing container 10, carbon dioxide is supplied from a siphon-type liquefied carbon dioxide cylinder through a cooler (chiller) by a liquid feed pump and pressurized to the pressure set by the control unit. During the pressurization operation, the liquefied carbon dioxide exceeds the critical point (304 °C, 7.4 MPa) and changes from a subcritical state to a supercritical state, generating a supercritical fluid in the dyeing container 10. By previously installing fibers and dyes in the dyeing container 10, the dyeing process can be performed.

[0031] FIG. 2 is a schematic cross-sectional view showing the internal structure of the dyeing container. The dyeing container 10 includes a container body 11 made of a metal material with high pressure resistance. The container body 11 is provided with an inlet portion 11a for introducing the dyeing medium and an outlet portion 11b for discharging the dyeing medium disposed opposite to each other on the upper side surface. The inlet portion 11a is connected and communicated with the introduction pipeline of the dyeing medium, and the outlet portion 11b is connected and communicated with the discharge pipeline, forming a communication port for flowing the dyeing medium.

[0032] On the lower side surface of the container body 11, an inlet portion 11c for introducing the cleaning liquid and an outlet portion 11d for discharging the cleaning liquid are disposed opposite to each other and provided, and are connected to a cleaning mechanism (not shown) during the cleaning process after the dyeing process so as to communicate with the inside of the container body 11.

[0033] The container body 11 is formed in a cylindrical shape, and inside it, a cylindrical support 14 is detachably arranged at a predetermined interval from the inner peripheral surface of the container body 11. A plurality of protrusions 14a are attached and fixed to the outer peripheral surface of the support 14, and by the protrusions 14a abutting against the inner peripheral surface of the container body 11, it is held at a predetermined interval.

[0034] Below the support 14, an inner cylinder 15 and an outer cylinder 16 are arranged substantially concentrically and are detachably supported. The inner cylinder 15 is formed in a cylindrical shape from a mesh-like material and has liquid permeability, and is attached below the support 14 with a predetermined interval from the outer cylinder 16. Note that the inner cylinder 15 can be made of a material other than a mesh-like material as long as it has liquid permeability, for example, a thin plate material with a large number of small holes may also be used.

[0035] Flange-shaped attachment members 15a and 15b are respectively fixed to the upper and lower ends of the inner cylinder 15. The attachment member 15a is fitted into a fitting portion 14b protruding inside the support 14 and is detachably attached. The attachment member 15b is fitted into a fitting portion 17b protruding inside a pedestal member 17 arranged on the bottom surface of the container body 11 and is detachably attached.

[0036] A plurality of protrusions 17a are fixed to the outer peripheral surface of the pedestal member 17, and by the protrusions 17a abutting against the outer peripheral surface on the bottom surface side of the container body 11, the inner cylinder 15 to which the pedestal member 17 is attached is stably held inside the container body 11.

[0037] The outer cylinder 16 is formed in a shape with substantially the same thickness as the lower end portion of the support 14, and its upper end portion is fitted into the step portion of the lower end portion of the support 14 and is detachably attached. And the outer cylinder 16 extends in a shape where the surface is flush with no step from the lower end portion of the support 14, and is attached with a predetermined interval between the lower end portion and the pedestal member 17.

[0038] Inside the support 14, a container 18 for containing dye, which abuts against the upper end of the inner cylindrical body 15, is detachably attached. In this example, the container 18 is composed of two upper and lower mesh materials fitted inside the support 14, and the dye D is contained between the mesh materials. The container 18 only needs to be arranged inside the container body 11. For example, it can also be arranged so that a bag body containing dye is suspended between the inner cylindrical body 15 and the outer cylindrical body 16, and is not particularly limited.

[0039] Inside the support 14, a propeller-shaped agitator 31 is arranged facing the upper side of the inner cylindrical body 15 above the container 18. A rotating shaft 33 is attached to the upper side of the agitator 31, and the agitator 31 rotates due to the rotation of the rotating shaft 33 to cause the dyeing medium to flow in the vertical direction. At the upper end portion of the support 14 above the agitator 31, a plurality of locations are notched in the circumferential direction to form a gap with the sealing body 12, and the dyeing medium flowing due to the rotation of the agitator 31 flows in and out between the inside and the outside of the support 14.

[0040] When taking out each member arranged inside the container body 11, the lid body 13 is removed and the agitator 31 together with the sealing body 12 is moved upward to expose the opening of the container body 11. Then, the support 14 is pulled upward to take out the inner cylindrical body 15 and the outer cylindrical body 16 to which the pedestal member 17 is attached at the lower end. Then, the inner cylindrical body 15 and the outer cylindrical body 16 are removed from below the support 14, and the pedestal member 17 is removed from the lower end of the inner cylindrical body 15. In this way, each member can be easily taken out and disassembled.

[0041] When accommodating the disassembled members in the container body 11, a cloth piece to be dyed is wound around the outer peripheral surface of the inner cylindrical body 15. The cloth piece may be formed to have a width substantially the same as the entire length of the inner cylindrical body 15, and may be wound so as to cover the entire outer peripheral surface of the inner cylindrical body 15 without overlapping.

[0042] After fitting and attaching the upper mounting member of the inner cylinder body 15 wrapped with the cloth piece to the lower side of the support body 14, the outer cylinder body 16 is mounted on the outside of the inner cylinder body 15 and fitted and attached to the lower side of the support body 14. Next, the pedestal member 17 is fitted and attached to the lower mounting member of the inner cylinder body 15, and with the pedestal member 17 facing downward, the support body 14 is inserted and accommodated into the container body 11. After fitting and arranging the container 18 containing the dye from above the accommodated support body 14, the stirring body 31 is lowered together with the sealing body 12 from above, the stirring body 31 is arranged inside the support body 14, and the opening of the container body 11 is sealed by the sealing body 12. The lid body 13 is screwed and fixed to the container body 11 from above the sealed sealing body 12. In this way, the dye and the cloth piece for dyeing can be easily attached and each member can be accommodated.

[0043] FIG. 3 is an explanatory view showing how the dyeing medium flows due to the rotation of the stirring body. Due to the rotation of the stirring body 31, the dyeing medium flows downward or upward above the support body 14. When the dyeing medium flows downward, the dyeing medium passes through the container 18 and flows into the inner cylinder body 15, and then flows into the outer cylinder body 16 through the inner cylinder body 15.

[0044] The dye dissolves in the dyeing medium passing through the container 18, and the dyebath in which the dye is dissolved flows into the inner cylinder body 15. Since the bottom of the inner cylinder body 15 is closed by the pedestal member 17, the dyebath flowing into the inside radiates out from the outer peripheral surface of the inner cylinder body 15 and comes into uniform contact with the entire wrapped cloth piece, so that a uniform dyeing process can be performed.

[0045] The dyebath flowing into the outer cylinder body 16 flows out from between the lower end of the outer cylinder body 16 and the pedestal member 17 and rises in the gap between the outer cylinder body 16 and the inner peripheral surface of the container body 11, and the rising dyebath rises along the inner peripheral surface and flows into the inside of the support body 14 from the upper end of the support body 14. Since the outer peripheral surfaces of the support body 14 and the outer cylinder body 16 are flush, the upward flow flows with almost no turbulence.

[0046] In this case, a downward flow is generated at the center of the container body 11 (inside the inner cylinder 15), and an upward flow is generated at the periphery (outside the outer cylinder 16), so that a flow similar to convection is generated, and the dyeing medium convects while repeatedly passing through the container 18, and the dye solution uniformly diffuses into the container body.

[0047] Also, when the dyeing medium flows upward due to the rotation of the agitator 31, it flows in the opposite direction to the case where it flows downward, and a downward flow is generated at the periphery (outside the outer cylinder 16), and an upward flow is generated at the center (inside the inner cylinder 15). Since the bottom of the inner cylinder 15 is connected to the pedestal member 17, the dye solution flows in converging from the periphery of the inner cylinder 15 into the inner cylinder 15 and passes through the entire peripheral surface. Therefore, the dye solution passes from the outside to the inside and uniformly contacts the entire piece of cloth wound around the periphery of the inner cylinder 15, and a uniform dyeing process is performed.

[0048] Therefore, by controlling the rotation direction of the agitator 31 and appropriately combining the downward and upward flow operations, the flow from the inside to the outside or from the outside to the inside is repeatedly performed on the entire piece of cloth, and the dye solution is uniformly contacted throughout to enable a uniform dyeing process.

Example

[0049] In the dyeing test apparatus shown in FIG. 1, three sets of a set of pipelines and components connecting the dyeing container 10 and the common supply pipe 51 and the common discharge pipe 52 were connected to configure the test apparatus. The dyeing container 10 is made of metal, and for the support 14, the outer cylinder 16, and the pedestal member 17, which are dyeing jigs set inside, those formed by shaping a metal material were used. For the inner cylinder 15 and the container 18, those obtained by cutting a metal mesh material were used. As the supply pump 50, a pump (SFX-2-10) manufactured by ISCO was used.

[0050] The control unit 100 sets the temperature inside the container and the like for heating control of the heaters 25 and 26, and sets the pressure inside the container. Also, the rotation direction and rotation time of the stirring device are set. Such settings of temperature and the like are set for each dyeing container.

[0051] Remove the lid 13, take out the dyeing jig in the dyeing container 10, wrap a piece of cloth for dyeing (for example, a commercially available PET fabric cut to 10 cm in length and 30 cm in width; weight 6 g) around the inner cylinder 15, and after accommodating the dye (yellow and red dyes manufactured by Kowa Chemical Industry Co., Ltd.; corresponding to 9 / 13 amounts of concentrations 0.1% and 2%) in the container 18, insert it into the dyeing container 10. Insert the agitator 31 into the support 14, seal the opening of the dyeing container 10 with the sealing body 12, and then screw on the lid 13.

[0052] Next, after controlling the heating of the heater so that the temperature inside the container reaches the set temperature (for example, 120°C), open the introduction valve 20, introduce the liquid of carbon dioxide, which is the dyeing medium, into the dyeing container 10, and start operating the stirring device.

[0053] After the pressure value of the pressure sensor 23 reaches the set value (for example, 25 MPa), after the pressure inside the container stabilizes at the set pressure at the set temperature, close the introduction valve 20. To maintain the set pressure, when it becomes higher than the set pressure, open the discharge valve 22 and adjust the discharge amount with the discharge adjustment valve 21. When it becomes lower than the set pressure, open the introduction valve 20 for a short time to introduce carbon dioxide for pressure adjustment. Perform the dyeing process for a predetermined time (for example, 60 minutes) at the set temperature and set pressure.

[0054] After the dyeing process, stop the heating of the heater and the driving of the stirring device, stop the driving of the supply pump 50, then open the discharge valve 22 and gradually reduce the pressure with the discharge adjustment valve 21. After confirming that the pressure has returned to normal pressure, open the introduction valve 20. After confirming that the temperature inside the container has become normal temperature, remove the lid 13 and take out the dyed cloth piece from the dyeing container 10. Then, introduce the cleaning liquid into the dyeing container 10 by the cleaning mechanism to perform the cleaning process.

[0055] After removing the dye on the surface of the taken-out fabric pieces and drying them, the hue was evaluated. In both cases of concentrations of 0.1% and 2%, for each dye, they were dyed into a uniform color without color unevenness according to the concentration, and good reproducibility was confirmed. Also, regarding the evaluation of the dyeing fastness (JIS L0801), under various conditions such as washing, drying, water, sweat, sublimation, lightfastness, and rubbing, all treatments with each dye obtained an evaluation of grade 4 or higher, confirming that the same level of treatment as the actual dyeing treatment was carried out.

Explanation of Reference Signs

[0056] 1 ··· Dyeing test apparatus, 10 ··· Dyeing container, 11 ··· Container body, 12 ··· Sealing body, 13 ··· Cover body, 14 ··· Support body, 15 ··· Inner cylinder, 16 ··· Outer cylinder, 17 ··· Pedestal member, 18 ··· Receptacle, 20 ··· Introduction valve, 21 ··· Discharge adjustment valve, 22 ··· Discharge valve, 23 ··· Pressure sensor, 24 ··· Safety valve, 25, 26 ··· Heater, 30 ··· Stirring device, 31 ··· Stirring body, 32 ··· Driving mechanism, 50 ··· Supply pump, 51 ··· Common supply pipe, 52 ··· Common discharge pipe

Claims

1. In a dyeing test apparatus comprising a dyeing section for accommodating a dye and a cloth piece for dyeing, a supply section for supplying a dyeing medium into the dyeing section, an adjustment section for adjusting the temperature and pressure of the dyeing medium filled in the dyeing section, and a control section for controlling the adjustment section to set the dyeing medium in the dyeing section to a predetermined temperature and a predetermined pressure and perform a dyeing process in a supercritical fluid state, the dyeing section includes a container body having a communication port formed on a side surface thereof and connected to the supply section via a pipe line to allow the dyeing medium to flow therethrough, with an upper side thereof being open; a container for accommodating the dye disposed in the container body; a sealing body for detachably sealing the opening of the container body; a cylindrical support body detachably disposed at a predetermined interval from the inner peripheral surface of the container body; an outer cylindrical body detachably attached below the support body at a predetermined interval from the inner peripheral surface of the container body; a liquid-permeable inner cylindrical body detachably attached below the support body at a predetermined interval inside the outer cylindrical body and for holding the cloth piece therearound; and a stirring body attached below the sealing body and disposed opposite to the upper side of the inner cylindrical body inside the support body. A dyeing test apparatus.

2. The dyeing test apparatus according to claim 1, wherein the inner cylindrical body is formed of a mesh-like cylindrical body, and a pedestal member disposed at the bottom of the container body is detachably attached to a lower end portion thereof.

3. The dyeing test apparatus according to claim 1 or 2, wherein the support body is provided with a plurality of protrusions on an outer peripheral surface thereof, and the protrusions are disposed at a predetermined interval from the inner peripheral surface of the container body by contacting the inner peripheral surface of the container body.

4. The dyeing test apparatus according to claim 1 or 2, wherein the sealing body supports a rotation shaft of the stirring body, and a drive mechanism for rotationally driving the stirring body is provided above the sealing body.

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