JPH0141747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for dyeing and drying fibers, in which a dye is fixed on a fiber material such as thread, cloth, loose hair, etc., and then dried.

[Conventional technology]

For example, as a conventional fiber dyeing method,
There is one described in Publication No. 13677. This is a method of group-processing fiber materials using a liquid treatment agent, in which a thread package is attached to a porous thread-wound support pipe established in a first tank, and a selective activation valve is connected between the support pipe and the second tank. The first tank and the second tank are connected together with a processing agent storage source through a reversible pump, and the first tank is connected with a vacuum pump through a valve, and the second tank is connected with a valve. It consists of a structure in which a high pressure source and a steam generation source are connected via. Then, the selective operation valve is closed and the processing agent is stored in the second tank from the storage source, and the processing agent is heated by the steam generation source and the inside of the second tank is pressurized by the high pressure source. Meanwhile, in parallel with this, the pressure inside the first tank is reduced by a vacuum pump. Next, when the pressure difference in the first and second tanks reaches a certain value, the selection valve is opened and the processing agent in the second tank is applied to the yarn package through the spool support tube using the pressure difference. penetrate inside. Further, in a state where there is no pressure difference between the first and second tanks, the reversible pump is operated to circulate the processing agent from the second tank to the first tank and from the first tank to the second tank to perform dyeing. Once the dyeing is finished, the processing agent in the first tank is removed and the yarn package is taken out and placed in a separately prepared centrifugal separator or the like to dehydrate it or heat it to dry it.

[Problem to be solved by the invention]

However, according to the above method, one side of each fiber surface within the yarn package is dyed well due to the pressure of the treatment agent, but since the treatment agent passes under high pressure from the inside of the yarn package to the outside, each Even if the inner surface of the fiber is good, the outer surface is insufficiently dyed. In order to compensate for this, the processing agent is then simply circulated without any pressure difference between the two tanks, so the dyeing process takes a long time. Furthermore, in order to dry the yarn package after finishing the dyeing process, the yarn package must be removed from the first tank and dehydrated using a separately prepared centrifugal separator, etc., which requires a lot of effort and time. However, it is undeniable that the efficiency of dyeing and drying processing is reduced.

Therefore, the method for dyeing and drying fibers of the present invention eliminates the above-mentioned drawbacks, and increases the degree of fixation of dye molecules on both sides of the fiber material in an extremely short time, shortens the time required for dyeing, and also simplifies drying. The purpose of this is to improve workability and productivity by ensuring that the

[Means to solve the problem]

In order to achieve this purpose, the method for dyeing and drying fibers of the present invention involves establishing a porous pipe in an airtightly sealed dye tank with a lid, and connecting the porous pipe and the dye solution placed outside the dye tank. A depressurizing pump and a pressurizing pump are connected to the dye vat and the dye liquor tank through a plurality of valves, respectively, and the fibrous material is fixed to the outer periphery of the porous pipe. , operate the valve to reduce the pressure inside the dye tank using the pressure reducing pump, simultaneously pressurize the inside of the dye tank that stores the heated dye solution, and then operate the on-off valve to dye using the pressure difference between the two. The liquid is ejected from the porous pipe and permeated into the fiber material, and then the valve is operated to pressurize the inside of the dye tank where the dye liquid has accumulated using the pressurizing pump, and reduce the pressure inside the dye tank before opening and closing. By operating the valve, the dye liquor is returned from the porous pipe to the dye liquor tank by utilizing the pressure difference between the two sides, and then the inside of the dye tank is depressurized and heated uniformly while the fiber material is still attached to the porous pipe. to dry the fiber material.

[Effect]

The dyeing tank is airtightly sealed by fixing the fiber material to the porous pipe, and the on-off valve is closed and the valve is operated to reduce the pressure inside the dyeing tank with the decompression pump.At the same time, the inside of the dyeing tank is put under high pressure with the pressurizing pump. state. and,
When the pressure difference in the dye vat and dye liquor tank reaches a certain value, the on-off valve is opened all at once and the dye liquor in the dye liquor tank is pumped under high pressure through the many small holes in the porous pipe using the pressure difference. It is blown out into the dye vat. This causes the dye molecules of the dye liquor to penetrate deeply into the fiber material, especially the inner surface. Next, the on-off valve is closed again and the valve is operated to bring the interior of the dyeing tank to a high pressure state using the pressurizing pump, and at the same time, bring the interior of the dye liquor tank to a reduced pressure state using the decompression pump. When the pressure difference in the dye vat and dye liquid tank reaches a certain value, the on-off valve is opened again and the dye liquid in the dye vat is transferred into the porous pipe and further into the dye liquid tank using the pressure difference. Return with high pressure. As a result, the dye molecules of the dye liquor flow back into the fiber material in the opposite direction and penetrate deeply into the outer surface. Next, the dye liquor is returned to the dye liquor tank, and the interior of the dye tank is reduced in pressure while being fixed to the porous tube, and the textile material is dried by uniform heating.

〔Example〕

An embodiment of the fiber dyeing and drying method of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, reference numeral 1 in the figure indicates a dye tank with a lid that can be hermetically sealed, and a plurality of porous pipes 3 are vertically established on a branch base 2 in the dye tank 1.
A fiber material 4 such as worsted yarn cheese can be inserted into each of the porous tubes 3. 5 is a dye liquid tank, and a steam pipe 6 is installed therein to heat the dye liquid stored therein. The bottom of the dye liquor tank 5 and the branch base 2 connected to the porous pipe 3 in the dye tank 1 are connected by a communicating pipe 7.
is provided with an on-off valve 8. Reference numeral 9 denotes a vacuum generating pump, and the vacuum pump 9 has a branched suction side, one of which is connected to the upper part of the dye tank 1 through a valve 10, and the other connected to the upper part of the dye liquor tank 5 through a valve 11. Continue. Reference numeral 12 denotes a pressure pump for compression, and the blowing side of the pressure pump 12 is branched, one of which is connected to the upper part of the dye tank 1 via a valve 13, and the other is connected to the upper part of the dye liquor tank 5 with a valve 14. Inherited through. Reference numeral 15 denotes a microwave generator with an output of several kilowatts, which is composed of a known magnetron oscillation tube and oscillates microwaves with a frequency of 2400 to 2500 megahertz, and its waveguide 16 is connected to the upper part of the dye tank 1. 17,18
indicate pressure gauges attached to the dye tank 1 and the dye liquid tank 5, respectively.

When dyeing each of the fibrous materials 4 fixed to the porous tube 3, the on-off valve 8 is first closed, the valves 10 and 14 are opened, and the valves 11 and 13 are closed and the pressure reducing pump 9 and the pressurizing pump are By operating the dye tank 12, the pressure inside the dye tank 1 is reduced and at the same time the pressure inside the dye liquor tank 5 is increased. Further, the temperature of the dye liquid in the dye liquid tank 5 is set to a constant temperature by heating from the steam pipe 6. Then, the pressure inside the dye tank 1 is reduced to a sufficiently low air pressure, and the dye tank 5 is
Pressurize the inside to the highest possible air pressure and then open/close valve 8.
open all at once. Then, the dye liquid in the dye liquid tank 5 is transferred to the communication pipe 7 and the branch base 2 due to the pressure difference.
It is blown out into the dyeing tank 1 at high pressure through the many small holes of the porous pipe 3. For this reason, the dye liquid is sprayed at high pressure onto the fiber material 4 that is fixed to the porous tube 3, and the dye molecules penetrate deeply between the fiber structures, causing the surface of the fiber surface facing the flow direction (inner surface) to become It is dyed firmly. As the dye liquor blows out from the porous pipe 3, the air pressure inside the dye tank 1 increases, and the dye liquor that has been in the dye liquor tank 5 accumulates in the dye tank 1. Next, open/close valve 8 again
Close valve 1 and open valves 11 and 13.
0 and 14, the vacuum pump 9 is connected to the dye liquor tank 5, and the pressure pump 12 is connected to the dye tank 1, respectively. Both pumps 9 and 12 are operated to pressurize the inside of the dye tank 1 and at the same time reduce the pressure inside the dye liquid tank 5. Then, when the pressure is sufficiently increased and decreased, the on-off valve 8 is opened and the dye liquor accumulated in the dye tank 1 is returned to the dye liquor tank 5 through the communication pipe 7. At this time, the dye liquor accumulated in the dye tank 1 flows back through the fiber material 4 in the opposite direction due to the pressure difference and is absorbed into the small pores of the porous tube 3, so that the dye molecules are absorbed into the fiber material 4. It penetrates into the tissue again in a different direction, and the surface of the fiber surface facing the direction of flow (outer surface) is firmly stained. By repeating this process as necessary, the dye molecules are more deeply fixed in the fiber tissue. After completing the necessary dyeing process, the dye liquor is returned to the dye liquor tank 5, and the pressure inside the dye tank 1 is reduced again while each fiber material 4 remains fixed to the porous tube 3. As a result, the water impregnated in each fiber material 4 causes low-temperature boiling and evaporates under reduced pressure, and if necessary, the microwave generator 15 is operated to introduce microwaves into the dyeing tank 1. By irradiating each fiber material 4, each fiber material 4 is
is dried by uniform heating. Since heating is performed under reduced pressure in this manner, drying can be accomplished in a short time.

The dyeing equipment shown in Figure 2 is equipped with two dyeing tanks for one dye liquor tank in order to increase productivity compared to the one in Figure 1, and the dyeing equipment is alternately connected to both dyeing tanks from the dye liquor tank. It is possible to supply a dye liquor, or to perform a dyeing process in one dye tank while replacing the fiber material in the other dye tank. The dyeing method in this apparatus is also the same as that shown in FIG. 1 already explained, so the same or corresponding parts are given the same reference numerals as in FIG. 1, and detailed explanation thereof will be omitted.

〔Effect of the invention〕

As described above, according to the fiber dyeing and drying method of the present invention, the dye solution can be infiltrated into the fiber material through the porous tube in different directions from the inner surface and the outer surface, both under high pressure. Because it is carried out under different conditions, it is possible to fix the dye molecules into the fiber tissue in an extremely short time, and it is fixed evenly and evenly, improving the fixing properties of the dye molecules and preventing discoloration. . Furthermore, after dyeing, the fibers are heated and dried under reduced pressure while attached to the porous tube, which shortens the drying time and saves the time and effort of taking them out and putting them in a dehydrator as in the past. Together with the above-mentioned factors, this has an effect that greatly contributes to improving the working efficiency and productivity in these dyeing and drying steps.

[Brief explanation of drawings]

The figures relate to the fiber dyeing and drying method of the present invention; Figure 1 is a piping system diagram of the fiber dyeing equipment;
The figure is a piping system diagram showing another embodiment. 1... dye tank, 3... porous pipe, 4... fiber material,
5... Dye liquid tank, 7... Communication pipe, 8... Open/close valve, 9... Pressure reducing pump, 10, 11... Valve,
12...pressure pump, 13,14...valve.

Claims (1)

[Claims] 1. A porous pipe is established in an airtightly sealed dye tank with a lid, and the porous pipe is communicated with a dye liquor tank placed outside the dye tank via an on-off valve, so that the dye tank and the dye tank are A depressurizing pump and a pressurizing pump are each connected to the liquid tank via a plurality of valves, a fibrous material is fixed to the outer periphery of the porous pipe, and the valves are operated to reduce the pressure in the dyeing tank by the decompressing pump. At the same time, by pressurizing the inside of the dye liquid tank that stores the heated dye liquid and then operating the on-off valve, the dye liquid is squirted out from the porous pipe using the pressure difference between the two, allowing it to penetrate into the textile material. Then, the valve is operated to pressurize the inside of the dye vat in which the dye liquid has accumulated using the pressure pump, and the pressure inside the dye liquid tank is reduced, and then the on-off valve is operated to increase the pressure of the dye liquid by utilizing the pressure difference between the two. A fiber characterized in that the fiber material is returned from the porous pipe into a dye liquor tank, and then the interior of the dye tank is depressurized and uniformly heated while the fiber material is attached to the porous pipe to dry the fiber material. dyeing and drying methods.