KR102176636B1 - Dyeing Method Of For Improving Build-up And Fastness To A Modificated Polypropylene Yarn - Google Patents

Abstract

The present invention relates to a dyeing method for improving dyeing and fastness of a modified polypropylene yarn, comprising: a refining step (S1) of removing impurities from a polypropylene yarn in a dyeing tank (10) by using a refining agent; a dyeing step (S2) of dyeing the polypropylene yarn from which impurities are removed in the dyeing tank (10) by raising the temperature of a dyebath in the dyeing tank (10), which includes a dispersed dye or a liquid dye, to 131 to 140°C for 131 to 280 minutes according to the color of the dispersed dye or the liquid dye; a reduction cleaning step (S3) of uniformly reducing and cleaning a non-dyed portion and a contaminated portion of the polypropylene yarn by using a reduction bath including a reducing agent; and a dye residual amount removing step (S4) of forming a dye residual amount removing bath in the dyeing tank (10) to remove a residual amount of the dye remaining in the dyeing tank (10), raising the temperature, maintaining the raised temperature, and then discharging the residual amount of the dye from the dyeing tank (10), wherein the dispersed dye is used to dye the polypropylene yarn in a light color having a dyeing concentration of less than 1%, a neutral color having a dyeing concentration of 1% or more and less than 3%, a neutral deep color having a dyeing concentration of 3% or more and less than 6%, and a deep color having a dyeing concentration of 6% or more and less than 8%, and the liquid dye is used to dye the polypropylene yarn in a black color.

Description

Dyeing Method Of For Improving Build-up And Fastness To A Modificated Polypropylene Yarn}

The present invention is a refining step (S1) of removing impurities in the polypropylene yarn in the dyeing tank 10 using a refining agent; In the dyeing tank 10 by heating the dyeing bath in the dyeing tank 10 containing the disperse dye or liquid dye to 131 to 140°C for 131 to 280 minutes depending on the color of the disperse dye or liquid dye. A dyeing step (S2) of dyeing the polypropylene yarn from which impurities have been removed; Reduction washing step (S3) capable of uniformly reducing and washing undyed portions and contaminated portions of the polypropylene yarn using a reduction bath containing a reducing agent; And forming a dye residual amount removal bath in the dyeing tank 10 to remove the residual dye amount remaining in the dyeing tank 10, maintaining the elevated and elevated temperature, and then removing the residual dye discharged from the dyeing tank 10. Including step (S4), wherein the dispersion dye is the polypropylene yarn, a color rendering having a dyeing concentration of less than 1%, a neutral color having a dyeing concentration of 1% or more and less than 3%, 3% or more and less than 6% In a modified polypropylene yarn, characterized in that it is used for dyeing with a medium dark color having a dyeing concentration and a dark color having a dyeing concentration of 6% or more and up to 8%, and the liquid dye is used to dye the polypropylene yarn in black. It relates to a dyeing method for improving dyeing and fastness to the skin.

Hereinafter, referring to the background technology together with the accompanying drawings as follows.

Polypropylene (PP) is formed of a polymer material composed of hydrocarbons as shown in the following structural formula. Such polypropylene is light due to its low specific gravity, does not absorb moisture, does not generate static electricity, and cannot generate germs, so it is attracting attention as an automobile interior and sanitary material. In addition, polypropylene has low thermal conductivity, excellent heat retention, excellent chemical resistance, abrasion resistance, and elasticity, and has recently been developed into various fiber materials. Currently, polypropylene fibers are generally made of staple fibers or filament yarns.

[PP structural formula]

However, since the polypropylene yarn is actually hydrophobic and highly crystalline, it has a disadvantage that it is difficult for water or dye to penetrate and dyeing is difficult. Specifically, polypropylene yarns are not well-dyed because of the compactness of the non-polar structure and molecular structure having a high crystal region of 2/3 or more, and as a result, raw yarns occupy most of the polypropylene yarns. There is a limit to its use as a textile for clothing.

Thus, in order to color and dye hydrophobic polypropylene yarn, a resin chip is generally used as a method of giving a color by mixing a pigment-based dye in a polymer compound and then spinning it. It has not been able to solve the fundamental problem of polypropylene yarn that cannot be given.

In order to solve this problem, a polypropylene (Modificated Polypropylene; MPP) yarn having been chemically modified to enable dyeing of polypropylene has been proposed. For example, research on manufacturing polypropylene to allow dyeing by adding a functional polymer material and a non-crystalline functional polymer material to a water-soluble group or a reactive group is being actively conducted, and some companies in Korea are currently modifying polypropylene yarns. It is a situation that has been successfully marketed.

However, it is still difficult to apply such modified polypropylene as a material for actual clothing. Since the modified fiber is also unable to apply a binder on the fiber, it is adsorbed, but it is not possible to control the phenomenon that the dye is continuously discharged by washing with water or washing, and the dipping and printing process required for textiles After washing fastness (grade 3 or higher), friction fastness (grade 3-4 or higher), and light fastness (grade 3-4 or higher) were not satisfied.

Meanwhile, since the modified polypropylene yarn has a relatively low thermal curing temperature, it is important to properly control the dyeing temperature during the dyeing process, and special attention should be paid to preventing deformation of other fiber materials used together. For example, in the case of impregnating modified polypropylene/urethane fibers or modified polypropylene/spandex fibers, the dyeing rate increases as the temperature increases, but treatment at an excessively high temperature increases the urethane material and spandex contained in the fibers. ) Is thermally decomposed.

In addition, when printing the modified polypropylene yarn, attention should be paid to the fixing method and fixing temperature in consideration of the heat curing temperature. This is because the general polyester fiber is stable against heat even at 200°C or higher, but the modified polypropylene yarn can undergo thermal curing at a relatively low temperature of about 160°C. In addition, since the modified polypropylene yarn is of low hygroscopicity, heat treatment by applying the existing steaming method as it is is an unsuitable fixing method in printing the modified polypropylene yarn.

Therefore, it is intended to be applied to the modified polypropylene yarn, and it realizes excellent dyeing rate, build-up characteristics, fastness to washing, friction and sunlight, and at the same time preventing heat deformation of the material so that complete dyeing can be achieved. The'Dyeing Method of Modified Polypropylene Yarn' of Patent No. 10-1560157, which has been applied and registered after the development of a new type of dye and a dyeing method, has been disclosed.

However, the dyeing method of the modified polypropylene yarn of Patent No. 10-1560157 realizes superior dyeing rate, build-up characteristics, fastness to washing, friction and sunlight compared to the conventional dyeing method. It is true that it prevents heat deformation of the material, but there are still insufficient parts in dyeing rate, build-up characteristics, washing fastness, friction fastness, light fastness, and sublimation fastness, and thermal deformation prevention characteristics of the material. Is emerging as an urgent task.

Korean Registered Patent No. 10-1926624 (2018.12.03.)

The dyeing method for improving dyeing and fastness of the modified polypropylene yarn according to the present invention is to solve the following matters.

It is an object of the present invention to improve dyeing and fastness to polypropylene yarns with improved dyeing rate, build-up properties, washing fastness, friction fastness, light fastness, and sublimation fastness, and thermal deformation prevention properties of the material. It is to provide a dyeing method for

The dyeing method for improving dyeing and fastness to the modified polypropylene yarn according to the present invention is to solve the above problems,

Refining step (S1) of removing impurities in the polypropylene yarn in the dyeing tank 10 using a refining agent; In the dyeing tank 10 by heating the dyeing bath in the dyeing tank 10 containing the disperse dye or liquid dye to 131 to 140°C for 131 to 280 minutes depending on the color of the disperse dye or liquid dye. A dyeing step (S2) of dyeing the polypropylene yarn from which impurities have been removed; Reduction washing step (S3) capable of uniformly reducing and washing undyed portions and contaminated portions of the polypropylene yarn using a reduction bath containing a reducing agent; And forming a dye residual amount removal bath in the dyeing tank 10 to remove the residual dye amount remaining in the dyeing tank 10, maintaining the elevated and elevated temperature, and then removing the residual dye discharged from the dyeing tank 10. Including step (S4), wherein the dispersion dye is the polypropylene yarn, a color rendering having a dyeing concentration of less than 1%, a neutral color having a dyeing concentration of 1% or more and less than 3%, 3% or more and less than 6% It is characterized in that it is used for dyeing in medium tones having a dyeing concentration, and to dark colors having a dyeing concentration of 6% or more and up to 8%, and the liquid dye is used to dye the polypropylene yarn in black.

The refining step (S1) includes a refining bath generating step (S1-1) of adding the polypropylene yarn, water, and a refining agent to the dyeing tank 10 together to generate a refining bath; A temperature raising step (S1-2) of raising the refining bath to a temperature of 90°C; A temperature maintenance step of maintaining the temperature of the refining bath at 90° C. for 10 minutes (S1-3); A first draining step (S1-4) of first draining the refining bath from the dyeing tank 10; Dyeing tank water filling and washing step (S1-5) of filling the dyeing tank 10 with water of 40° C. or less and washing the dyeing tank 10 with the water (S1-5); And a second drainage step (S1-6) of secondary drainage of the refining bath from the dyeing tank 10.

The dyeing step (S2) includes a preparation step (S2-1) of a polypropylene yarn for preparing a polypropylene yarn in one or more of the cheese 40 and the hank 50; Arrangement step (S2-2) of the polypropylene yarn in the dyeing tank by inserting the polypropylene yarn into the column 11 of the dyeing tank (10); A salt bath forming step (S2-3) of forming a salt bath by introducing the dispersion dye, liquid dye, preparation, and water into the dyeing tank 10; A temperature raising step (S2-4) of the salt bath of raising the temperature of the salt bath to one selected from among temperatures of 131 to 140°C; A temperature maintenance step (S2-5) of a dye bath maintaining the elevated temperature for 30 to 60 minutes depending on the dispersion dye or the liquid dye; Cooling the salt bath of cooling the maintained temperature to a temperature of 80 ℃ (S2-6); And a salt bath discharge step (S2-7) of discharging the salt bath from the dyeing tank 10, wherein the dispersion dye is selected from an S type or an SE type.

In the temperature maintaining step (S2-5) of the dye bath, when the disperse dye is color rendering, the heated temperature is maintained for 30 minutes, and in the temperature maintaining step (S2-5) of the dye bath, the disperse dye is neutral or medium-dark , Or when the color is dark or the liquid dye is black, the elevated temperature is maintained for 60 minutes.

In the heating step (S2-4), when the disperse dye is a color rendering having a dyeing concentration of less than 1%, the dye bath is heated to a temperature of 131 to 140℃ by 1℃ every 2 minutes, and the disperse dye is neutral, It is characterized in that the temperature of the dye bath is raised to a temperature of 131 to 140° C. by 1° C. per minute when the medium or dark color or the liquid dye is black.

In the reduction washing step (S3), water, a weakly alkaline preparation, and a reducing agent are added into the dyeing tank 10 in which the dyed polypropylene yarn is disposed, and dyed with the dispersion dye or liquid dye, and then the undyed portion And a reduction bath forming step (S3-1) of forming a reduction bath capable of uniformly reducing and washing the contaminated material. A reduction bath temperature maintaining step (S3-2) of maintaining the reduction bath at 85° C. for 15 to 20 minutes; It characterized in that it comprises a reduction bath discharge step (S3-3) of discharging the reduction bath from the dyeing tank (10).

The dye residual amount removing step (S4) includes a dyeing tank water filling and washing step (S4-1) of filling the dyeing tank 10 with water and washing the dyeing tank 10 with the water; Dye residual amount removal bath formation step of adding water, antistatic agent, paraffin-added softener, and glacial acetic acid to the dyeing tank 10 to remove the residual dye remaining in the dyeing tank 10 (S4-2); A step of raising the temperature of the residual dye removal bath to 60° C. (S4-3); Maintaining the temperature of the dye residual amount removing bath at 60° C. for 10 to 20 minutes (S4-4); And a step of discharging the dye residual amount removing bath (S4-5) for discharging the dye residual amount removing bath from the dyeing tank 10.

In the cooling step (S2-6) of the dyeing bath, an external cooling method of the dyeing tank 10 to cool the outside of the dyeing tank 10 with water using a hose, and cooling disposed within the dyeing tank 10 It is characterized in that the dyeing bath is cooled to a temperature of 80° C. by one or more of the internal cooling methods of the dyeing tank 10 in which the inside of the dyeing tank 10 is cooled by water flowing in the coil.

The dyeing method for improving dyeing and fastness of the modified polypropylene yarn according to the present invention includes dyeing rate, build-up characteristics, washing fastness, friction fastness, sunlight fastness, and sublimation fastness by the above solution. It is possible to exert the effect of providing a dyeing method for improving dyeing and fastness to polypropylene yarns with improved heat deformation prevention properties of the material.

1 is a flowchart sequentially showing a dyeing method for improving dyeing and fastness to a modified polypropylene yarn of the present invention.
FIG. 2 is a flow chart showing the refining steps of FIG. 1 in order.
FIG. 3 is a flow chart showing sequentially by subdividing the dyeing steps of FIG. 1.
Figure 4 is a flow chart showing in order the subdivided and sequentially reduced washing step of Figure 1;
5 is a diagram showing a dyeing tank and an input tank used in the present invention.
6 is a view showing cheese and hank used in the dyeing step of FIG. 3.
FIG. 7 is a graph showing a process of heating the salt bath, maintaining the temperature rising temperature, and cooling the salt bath in the dyeing step of FIG. 3 in temperature-time coordinates.

Hereinafter, the present invention will be described with reference to the accompanying drawings, and the present invention will be described in detail with reference to preferred embodiments as follows.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, only the present embodiment is to complete the disclosure of the present invention, It is provided to fully inform the knowledgeable person of the scope of the invention, and the invention is only defined by the scope of the claims. And, throughout the entire specification, the same reference numerals refer to the same elements.

The present invention relates to a dyeing method for improving dyeing and fastness to a modified polypropylene yarn.

FIG. 1 is a flow chart sequentially showing a dyeing method for improving dyeing and fastness to a modified polypropylene yarn of the present invention, and FIG. 2 is a flow chart subdividing and sequentially showing the refining step of FIG. 1, and FIG. Fig. 1 is a flow chart subdividing and sequentially showing the dyeing steps of Fig. 1, Fig. 4 is a flow chart subdividing and sequentially showing the reduction and cleaning steps of Fig. 1, and Fig. 5 shows the dyeing tank and the input tank used in the present invention. 6 is a view showing the cheese and hank used in the dyeing step of FIG. 3, and FIG. 7 is a temperature-time coordinate of the process of raising the temperature, maintaining the temperature increase, and cooling the salt bath in the dyeing step of FIG. 3 This is the graph shown.

As shown in Figure 1, the dyeing method for improving dyeing and fastness to the modified polypropylene yarn of the present invention, refining step (S1), dyeing step (S2), reducing washing step (S3), and the remaining amount of dye It includes a removing step (S4).

1. Refining step (S1)

The refining step (S1) is a step of removing impurities in the polypropylene yarn in the dyeing tank 10 using a scouring agent.

Specifically, the refining step (S1) includes an input step (S1-1) of injecting the polypropylene yarn, water, and a scouring agent together into the dyeing tank 10 to generate a scouring bath; A temperature raising step (S1-2) of raising the refining bath to a temperature of 90°C; A temperature maintenance step of maintaining the temperature of the refining bath at 90° C. for 10 minutes (S1-3); A first draining step (S1-4) of first draining the refining bath from the dyeing tank 10; Dyeing tank water filling and washing step (S1-5) of filling the dyeing tank 10 with water of 40° C. or less and washing the dyeing tank 10 with the water (S1-5); And a second draining step (S1-6) of secondary draining the refining bath from the dyeing tank 10. Here, the water and the refining agent may be introduced through the input tank 20 by the operation of the pump P, as shown in FIG. 5.

According to the above configuration, when the polypropylene yarn is dyed by removing impurities in the polypropylene yarn using a scouring agent, it is possible to achieve more vivid color dyeing for the polypropylene yarn than when the impurities in the polypropylene yarn are not removed. There will be.

The polypropylene yarn used in the present invention is made of staple fibers as spun yarns or long fibers as false twisted yarns, and the short fibers consist of 4 to 49 counts so as to be able to be produced with the current technology, and the long fibers are It is preferably composed of 50 to 600 denier.

2. Dyeing step (S2)

In the dyeing step (S2), the polypropylene yarn from which impurities have been removed in the dyeing tank 10 is heated to 131 to 140°C for a period of 131 to 280 minutes in the dyeing bath containing a dispersion dye or a liquid dye. Dyeing. By heating the dyeing bath to 131 to 140°C for a period of 131 to 280 minutes, build-up characteristics, washing, friction and light fastness, and heat deformation of the material are prevented. The characteristics are improved.

5, the dyeing tank 10 is connected through the input tank 20 and the injection pipe 31, and the discharge pipe 32 connected to the pump P connected to the free end of the injection pipe 31. ), which is configured to discharge the dye in the dyeing tank 10 to the outside through an outlet (not shown) exposed to the outside of the pump P by the operation of the pump P. have.

The disperse dye is the polypropylene yarn, a color rendering color having a dyeing concentration of less than 1%, a neutral color having a dyeing concentration of 1% or more and less than 3%, a medium dark color having a dyeing concentration of 3% or more and less than 6%, and It is used to dye a dark color having a dyeing concentration of 6% or more and up to 8%, and the liquid dye is used to dye the polypropylene yarn in black. These disperse dyes are dissolved in the fiber bundle, and then the hydroxyl group and amino group of the dye inside the fiber are dyed by hydrogen bonding with the amino group and carboxyl group of the fiber. Here, the dyeing concentration means the amount of dye (g) / fiber weight (g) × 100 (%).

Specifically, the dyeing step (S2), the preparation step (S2-1) of a polypropylene yarn for preparing a polypropylene yarn in one or more states of the cheese 40 and the hank 50; Arrangement step (S2-2) of the polypropylene yarn in the dyeing tank by inserting the polypropylene yarn into the column 11 of the dyeing tank (10); A salt bath forming step (S2-3) of forming a salt bath by introducing the dispersion dye, liquid dye, preparation, and water into the dyeing tank 10; A heating step (S2-4) of the salt bath of raising the temperature of the salt bath to a temperature selected from among temperatures of 131 to 140°C; A temperature maintenance step (S2-5) of a dye bath maintaining the elevated temperature for 30 to 60 minutes depending on the dispersion dye or the liquid dye; Cooling the salt bath of cooling the maintained temperature to a temperature of 80 ℃ (S2-6); And a salt bath discharging step (S2-7) of discharging the salt bath from the dyeing tank 10, wherein the dispersion dye is selected from an S type or an SE type.

Here, the preparation refers to at least one of a dispersant and glacial acetic acid, and the dispersant is 1 to 2% as a percentage (%) of the polypropylene yarn as a dye, which is most advantageous for dispersion of the disperse dye, and the glacial acetic acid is ph 4 If it is less than the pH of the glacial acetic acid, it is preferable to maintain the pH of the glacial acetic acid at 4 to 5 because the disperse dye becomes acidic and dyeing is difficult. If the pH exceeds 5, the disperse dye changes to alkaline and thus dispersion is difficult.

In the heating step (S2-4) of the salt bath, the salt bath is heated to a temperature selected from 131 to 140°C, and the reason why the temperature raising temperature of the salt bath is in the range of 131 to 140°C is If is less than 131℃, the dyeing rate, build-up characteristics, fastness of washing, friction and sunlight, and heat distortion prevention characteristics of the material are not derived to the desired level, and the temperature rises. When the temperature exceeds 140℃, the dyeing rate, build-up characteristics, fastness of washing, friction and sunlight, and heat distortion prevention characteristics of the material are improved, but the dyeing tank ( 10) This is because safety problems such as bursting of safety pins or cracking of welds in other mechanical parts connected to the dyeing tank 10 occur.

In addition, in the heating step (S2-4), when the disperse dye has a dyeing concentration of less than 1%, the dye bath is heated to a temperature of 131 to 140℃ by 1℃ every 2 minutes, and the disperse dye is When the liquid dye is neutral, medium or dark, or the liquid dye is black, the dye bath is heated to a temperature of 131 to 140℃ by 1℃ per minute, thereby building-up of disperse dyes by color for polypropylene yarns. ) It is possible to derive the desired good level of properties, washing, fastness to friction and sunlight, and heat deformation prevention properties of the material.

In the temperature maintaining step (S2-5) of the dye bath, when the disperse dye is color rendering, the heated temperature is maintained for 30 minutes, and in the temperature maintaining step (S2-5) of the dye bath, the disperse dye is neutral or medium-dark , Or dark color or when the liquid dye is black, the elevated temperature is maintained for 60 minutes, and according to this configuration, it is possible to secure a leveling property to achieve uniform dyeing for the polypropylene yarn for each color.

In the cooling step (S2-6) of the dyeing bath, an external cooling method of the dyeing tank 10 to cool the outside of the dyeing tank 10 with water using a hose, and cooling disposed within the dyeing tank 10 The dye bath is cooled to a temperature of 80° C. by one or more of the internal cooling methods of the dyeing tank 10 that cools the inside of the dyeing tank 10 by water flowing in the coil. According to this configuration, since the dyeing tank 10 can be cooled in various ways, even when one of the cooling methods cannot be used, the dyeing tank 10 can be cooled using the other cooling method. .

The S-type disperse dye is a highly activated energy type dye that has excellent sublimation fastness (the degree of coloration by sublimation of a part of the dye during storage, or contamination to adjacent fabrics), and has excellent washing fastness and heat deformation prevention properties of the material. It is excellent, and the SE type dispersion dye is a medium activation energy type, and is suitable for use in colors of neutral colors or higher. The sublimation fastness, washing fastness, and heat distortion prevention properties of the material are not superior to those of the S type dispersion dye, but conventional dyes Better than others.

3. Reduction cleaning step (S3)

In the reduction washing step (S3), the undyed portion and the contaminated portion of the polypropylene yarn may be uniformly reduced and washed using a reduction bath containing a reducing agent.

Specifically, in the reduction washing step (S3), water, a weak alkaline preparation, and a reducing agent are added into the dyeing tank 10 in which the dyed polypropylene yarn is disposed, and then dyed with the dispersion dye or liquid dye. A reduction bath forming step (S3-1) of forming a reduction bath capable of uniformly reducing and washing undyed portions and contaminated ones; A reduction bath temperature maintaining step (S3-2) of maintaining the reduction bath at 85° C. for 15 to 20 minutes; And a reduction bath discharge step (S3-3) of discharging the reduction bath from the dyeing tank 10. According to this configuration, it is possible to uniformly reduce and clean the undyed portion and the contaminated portion of the polypropylene yarn using a reducing bath containing a reducing agent. Here, the water, the weakly alkaline aid, and the reducing agent may be introduced through the input tank 20 by the operation of the pump P as shown in FIG. 5.

4. Dye residual amount removal step (S4)

In the dye residual amount removing step (S4), a dye residual amount removing bath is formed in the dyeing tank 10 to remove the residual dye amount remaining in the dyeing tank 10, and the temperature raised and elevated temperature is maintained, and then the dyeing tank ( 10).

Specifically, the dye residual amount removal step (S4) includes a dyeing tank water filling and washing step (S4-1) of filling the dyeing tank 10 with water to flush the dyeing tank 10 with the water; Dye residual amount removal bath formation step of adding water, antistatic agent, paraffin-added softener, and glacial acetic acid to the dyeing tank 10 to remove the residual dye remaining in the dyeing tank 10 (S4-2); A step of raising the temperature of the residual dye removal bath to 60° C. (S4-3); Maintaining the temperature of the dye residual amount removing bath at 60° C. for 10 to 20 minutes (S4-4); And a discharging step (S4-5) of the dye residual amount removing bath for discharging the dye residual amount removing bath from the dyeing tank 10. Here, the water, the antistatic agent, the paraffin-added softener, and the glacial acetic acid may be added through the input tank 20 by the operation of the pump P as shown in FIG. 5.

It is possible to wash the dyeing tank 10 with the water by the dyeing tank water filling and washing step (S4-1).

In the dye residual amount removal bath forming step (S4-2), the antistatic agent can prevent the residual amount of dye from being attached to the dyeing tank 10 by the force of electricity, and the dyeing tank by the softener added with paraffin. (10) It is possible to remove the remaining amount of dye remaining in the dye and at the same time, it is possible to prevent some of the remaining amount of dye from re-adhering to the dyeing tank 10 with paraffin.It is also possible to prevent the remaining amount of dye in the dyeing tank 10 by glacial acetic acid. By being able to remove the residual amount of dye, the removal efficiency of the residual amount of dye remaining in the dyeing tank 10 is improved.

The washing power for the dyeing tank 10 may be increased due to the temperature of the dye residual amount removing bath increased in the temperature raising step (S4-3) of the dye residual amount removing bath and the temperature maintaining step (S4-4) of the dye residual amount removing bath. Thereafter, while passing through the discharge step (S4-5) of the residual dye amount removal bath, a cleanly washed dyeing tank 10 may be secured.

S1: refining step
S1-1: Refining bath generation step
S1-2: Temperature raising step
S1-3: Temperature maintenance step
S1-4: 1st drainage stage
S1-5: Dyeing tank water filling and washing step
S1-7: 2nd drainage stage
S2: Dyeing step
S2-1: Preparation of polypropylene yarn
S2-2: Arrangement step in the dyeing tank of polypropylene yarn
S2-3: Salt bath formation step
S2-4: Heating step of salt bath
S2-5: Temperature maintenance step of the salt bath
S2-6; Cooling step of salt bath
S2-7: Salt bath discharge step
S3: reduction cleaning step
S3-1: reduction bath formation step
S3-2: Reduction bath temperature maintenance step
S3-3: Reduction bath discharge step
S4: Dye residual amount removal step
S4-1: Dyeing tank water filling and washing step
S4-2: Dye residual amount removal bath formation step
S4-3: Heating step of the dye residual amount removal bath
S4-4: Temperature maintenance step of the dye residual amount removal bath
S4-5: Discharge step of the dye residual amount removal bath
10: dyeing tank
20: input tank
31: injection tube
32: discharge pipe
40: cheese
50: Hank
P: pump

Claims (6)

A refining step (S1) of removing impurities in the polypropylene yarn in the dyeing tank 10 using a refining agent;
In the dyeing tank 10 by heating the dyeing bath in the dyeing tank 10 containing the disperse dye or liquid dye to 131 to 140°C for 131 to 280 minutes depending on the color of the disperse dye or liquid dye. A dyeing step (S2) of dyeing the polypropylene yarn from which impurities have been removed;
Reduction washing step (S3) capable of uniformly reducing and washing undyed portions and contaminated portions of the polypropylene yarn using a reduction bath containing a reducing agent; And
A dye residual amount removal step of forming a dye residual amount removal bath in the dyeing tank 10 to remove the residual dye amount remaining in the dyeing tank 10, maintaining the temperature raised and elevated temperature, and then discharged from the dyeing tank 10 Including (S4),
The disperse dye is the polypropylene yarn, a color rendering color having a dyeing concentration of less than 1%, a neutral color having a dyeing concentration of 1% or more and less than 3%, a medium dark color having a dyeing concentration of 3% or more and less than 6%, and It is used to dye a dark color having a dyeing concentration of 6% or more and up to 8%, and the liquid dye is used to dye the polypropylene yarn in black,
The dyeing step (S2),
The preparation step of polypropylene yarns (S2-1) of preparing polypropylene yarns in one or more states of cheese 40 and hank 50;
Arrangement step (S2-2) of the polypropylene yarn in the dyeing tank by inserting the polypropylene yarn into the column 11 of the dyeing tank (10);
A salt bath forming step (S2-3) of forming a salt bath by introducing the dispersion dye, liquid dye, preparation, and water into the dyeing tank 10;
A heating step (S2-4) of the salt bath of raising the temperature of the salt bath to a temperature selected from among temperatures of 131 to 140°C;
A temperature maintenance step (S2-5) of a dye bath maintaining the elevated temperature for 30 to 60 minutes depending on the dispersion dye or the liquid dye;
Cooling the salt bath of cooling the maintained temperature to a temperature of 80 ℃ (S2-6); And
Including a salt bath discharge step (S2-7) of discharging the salt bath from the dyeing tank 10,
The dispersion dye is selected as S type or SE type,
The dye residual amount removal step (S4),
Dyeing tank water filling and washing step (S4-1) of filling the dyeing tank 10 with water to flush the dyeing tank 10 with the water;
Dye residual amount removal bath formation step of adding water, antistatic agent, paraffin-added softener, and glacial acetic acid to the dyeing tank 10 to remove the residual dye remaining in the dyeing tank 10 (S4-2);
A step of raising the temperature of the residual dye removal bath to 60° C. (S4-3);
Maintaining the temperature of the dye residual amount removing bath at 60° C. for 10 to 20 minutes (S4-4); And
A dyeing method for improving dyeing and fastness to the modified polypropylene yarn, comprising the step of discharging the dye residual amount removing bath (S4-5) for discharging the dye residual amount removing bath from the dyeing tank 10. The method of claim 1,
The refining step (S1),
A scouring bath generating step (S1-1) of adding the polypropylene yarn, water, and scouring agent to the dyeing tank 10 together to generate a scouring bath;
A temperature raising step (S1-2) of raising the refining bath to a temperature of 90°C;
A temperature maintenance step of maintaining the temperature of the refining bath at 90° C. for 10 minutes (S1-3);
A first draining step (S1-4) of first draining the refining bath from the dyeing tank 10;
Dyeing tank water filling and washing step (S1-5) of filling the dyeing tank 10 with water of 40° C. or less and washing the dyeing tank 10 with the water (S1-5); And
A dyeing method for improving dyeing and fastness to the modified polypropylene yarn, characterized in that it comprises a second drainage step (S1-6) of secondary draining the scouring bath from the dyeing tank 10. The method of claim 1,
In the temperature maintaining step (S2-5) of the salt bath, when the disperse dye is color rendering, the elevated temperature is maintained for 30 minutes,
Modified polypropylene, characterized in that maintaining the heated temperature for 60 minutes when the disperse dye is neutral, medium dark, or deep in the dye bath temperature maintaining step (S2-5), or the liquid dye is black Dyeing method to improve dyeing and fastness to yarn. The method of claim 1,
In the heating step (S2-4),
When the disperse dye is a color rendering having a dyeing concentration of less than 1%, the dyeing bath is heated to a temperature of 131 to 140°C every 2 minutes,
When the disperse dye is neutral, medium or dark, or the liquid dye is black, the dyeing bath is heated to a temperature of 131 to 140° C. by 1° C. per minute, and dyeing for a modified polypropylene yarn and Dyeing method to improve fastness. The method of claim 1,
The reduction cleaning step (S3),
In the dyeing tank 10 in which the dyed polypropylene yarns are arranged, water, weakly alkaline preparations, and reducing agents are added and dyed with the disperse dye or liquid dye, and then the undyed parts and contaminated items can be uniformly reduced and washed. A reducing bath forming step (S3-1) of forming a reducing bath that can be;
A reduction bath temperature maintaining step (S3-2) of maintaining the reduction bath at 85° C. for 15 to 20 minutes;
Dyeing method for improving dyeing and fastness to the modified polypropylene yarn, characterized in that it comprises a reduction bath discharge step (S3-3) of discharging the reduction bath from the dyeing tank (10). The method of claim 1,
In the cooling step (S2-6) of the dyeing bath, an external cooling method of the dyeing tank 10 to cool the outside of the dyeing tank 10 with water using a hose, and cooling disposed within the dyeing tank 10 Modification characterized in that the dyeing bath is cooled to a temperature of 80°C by one or more of the internal cooling methods of the dyeing tank 10 that cools the inside of the dyeing tank 10 by water flowing in the coil. Dyeing method to improve dyeing and fastness to polypropylene yarn.

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