KR20230059223A - Dyeing method of natural dye using CPB process - Google Patents

Abstract

The present invention relates to a dyeing method of a natural dye using a cold pad batch (CPB) process, which can provide the optimum process of dye using natural dyes wherein the process uses the CPB process, a field of a continuous dyeing method, to conduct a mordant dye of preprocessed fabrics with priority and maximizes the mordant effect through aging. Disclosed is, in the present invention, the dyeing method of a natural dye using the CPB process, which comprises: a preprocessing process which prepares a grey fabric and removes impurities of the fabric; a tenter process which tenters and dries the preprocessed fabric in a tenter under a temperature condition of 190±5 ℃; a mordant process which pads the dried fabric with a mordant agent; an aging process which ages the mordanted fabric for 12 hours or more; a washing and drying process which washes the fabric having the aging finished and then dries the same under a temperature condition of 180-195 ℃; a natural dye dyeing process which pads the mordanted fabric with a natural dye to fix the dye; a washing process which removes unfixed dyes after the dye of the natural dye is completed; and a postprocessing process which processes the fabric having the washing process finished.

Description

Dyeing method of natural dye using CPB process}

The present invention relates to a method for dyeing natural dyes using a CPB process, and more particularly, to preferentially mordant a fabric pretreated by utilizing a Cold Pad Batch (CPB) process, which is one of the continuous dyeing methods. It relates to a dyeing method of natural dyes using a CPB process that can provide an optimal process of dyeing using natural dyes that maximizes the mordant effect through progress and aging.

Until now, natural dyeing has been conducted mainly by the batch dyeing method, and in the case of cotton fabric knit, which is a representative natural dyeing product, there have been many difficulties in product development due to disadvantages such as wrinkles, uneven dyeing, pilling, and poor color fastness. .

On the other hand, among the dyeing methods of reactive dyes, the Cold Pad Batch (CPB) method is a dyeing method that has advantages in production and management. Compared to other methods, the dye adsorption rate is higher and dyeing is possible at a lower temperature, so it is not only very economical, such as low energy consumption and high productivity, but also has the advantage of being environment-friendly because there is little wastewater generated due to the operation under a low bath ratio. It is known as a dyeing method.

As a dyeing method of natural dyes using the CPB dyeing method, Korean Patent Registration No. 10-1380374 discloses a 'dyeing method of natural dyes using the CPB process'. However, the dyeing method utilizes a CPB process to undergo a padding process with natural dyes and then performs padding with a mordant to fix the dye. ), so the dye attached to the fabric crawls out of the mordant solution, causing uneven dyeing, and it is difficult to express vivid colors.

1. Republic of Korea Patent Registration No. 10-1380374 2. Republic of Korea Patent Registration No. 10-1301635 3. Republic of Korea Patent Registration No. 10-1729447

The present invention has been devised to solve the above-mentioned problems of the prior art, and by proceeding with the pre-mordanting process of the mordant before the padding process of the natural dye, it maximizes the mordant effect, that is, the fixation effect of the dye, to realize vivid color expression. Its solution is to provide a dyeing method of natural dyes using the CPB process of.

The dyeing method of natural dyes using the CPB process according to the present invention that solves the above problems is a pretreatment step of preparing raw fabric and removing impurities from the fabric; and, the pretreated fabric is 190 ± 5 A tenter process of tentering and drying under a temperature condition of ° C; a mordant process of padding the dried fabric with a mordant; and an aging process of aging the mordant-treated fabric for 12 hours or more; and A washing and drying step of washing the aged fabric with water and then drying it under a temperature condition of 180 to 195 ° C; and a natural dye dyeing step of fixing the dye by padding the mordant-treated fabric with a natural dye; and a water washing step for removing the unfixed dye after the dyeing of the natural dye is completed; and a post-processing step of processing the fabric upon which the water washing step is completed.

Here, the pretreatment process consists of a padding process, a aging process, and a continuous water washing process,

In the padding process, the prepared raw fabric is immersed in a scouring bath agent containing 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide at a padding speed of 15 to 30 m/min. Continuous scouring to remove impurities from the fabric under the condition,

Alternatively, the prepared raw fabric is added to a bleaching agent containing 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a water stabilizer, 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide Bathing and bleaching under the condition of a padding speed of 15 to 30 m/min,

Alternatively, the prepared raw fabric is processed into a silket containing 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a water stabilizer, 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 1% by weight of an absorbent, and 10 to 40% by weight of sodium hydroxide It is made by any one of the processes of processing the silket by supplying it to the silket processing device equipped with a padding speed of 15 to 30 m/min,

In the aging process, the fabric after the padding process is rotated in a place where the room temperature is maintained so that the pretreatment liquid buried in the fabric does not flow downward, and aged for 0 to 24 hours under conditions of a temperature of 20 to 30 ° C.

In the continuous water washing process, the aged fabric is steamed for 5 minutes to 10 minutes under conditions of a steam temperature of 25 to 100 ° C and a transfer speed of 15 to 25 m / min, and then washed with washing water at 95 ± 5 ° C. characterized by

Here, the mordant is characterized in that it is used as a mordant solution by dissolving potassium aluminum sulfate in water at room temperature to contain 1 to 5% by weight.

Here, the natural dye is characterized in that the madder.

The dyeing method of natural dyes using the CPB process provided according to the present invention can obtain a very vivid color expression effect despite the low concentration of dye and mordant, and therefore, the use of less dye and mordant during mass production. However, it is possible to obtain a dark color and save direct costs, which is a very big advantage considering that natural dyes are expensive.

In addition, it has the advantage of maximizing the mordant effect by solving the difficulties of uneven salt and vivid color development during the conventional post-mordanting treatment process.

1 shows the result of testing the color difference expression value (K/S) at a wavelength of 520 nm according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

In the present invention, in general, the mordant padding treatment is performed to fix the dye by padding the mordant after the dyeing process of reactive dyes, natural dyes, etc. is completed. There was a problem that the dye attached to the fabric crawled out of the mordant solution and caused uneven dyeing, and it was difficult to express vivid colors. Accordingly, the inventors of the present invention have found that the above conventional problems can be solved when the mordant treatment is performed before the padding process of natural dyes, and the present invention has been completed.

The dyeing method of natural dyes using the CPB process according to the present invention includes a pretreatment step of preparing raw fabric and removing impurities from the fabric, and tentering the pretreated fabric in a tenter at a temperature of 190 ± 5 ° C. A tenter process of tentering and drying; a mordant process of padding the dried fabric with a mordant; and an aging process of aging the mordant-treated fabric for 12 hours or more; and, the matured fabric Washing with water and then drying under a temperature condition of 180 to 195 ° C; and a natural dye dyeing step of padding the mordant-treated fabric with natural dye to fix the dye; and dyeing of the natural dye After completion, a water washing step for removing unfixed dye; and a post-processing step of processing the fabric after the water washing step is completed.

At this time, in the pretreatment process, a padding process, a aging process, and a continuous washing process are continuously performed,

In the padding process (see Table 1), the prepared raw fabric is immersed in a scouring bath containing 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide, so that the padding speed is 15 to 15%. Continuous scouring to remove impurities from the fabric at a speed of 30 m/min,

Alternatively, the prepared dough fabric is scoured with 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of fruit stabilizer, 1 to 2% by weight of scouring agent, 1% by weight of water purifying agent, 0.1% by weight of absorbent, and 1 to 2% by weight of sodium hydroxide Bathed in a bleaching agent containing 15 ~ 30m / min bleaching under the conditions of the padding speed,

Alternatively, the prepared raw fabric is processed into a silket containing 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a water stabilizer, 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 1% by weight of an absorbent, and 10 to 40% by weight of sodium hydroxide Supplying the silket processing device at a padding speed of 15 to 30 m/min to perform one selected process among the processes of processing the silket,

In the aging process, the fabric after the padding process is rotated in a place where the room temperature is maintained so that the pretreatment liquid buried in the fabric does not flow downward, and aged for 0 to 24 hours under conditions of a temperature of 20 to 30 ° C.

In the continuous water washing process, the aged fabric is steamed for 5 to 10 minutes under conditions of a steam temperature of 25 to 100 ° C and a transfer speed of 15 to 25 m / min, and then washed with washing water at 95 ± 5 ° C. will be. Each of these series of processes is performed continuously.

Table 1 of the present invention shows the process conditions of the padding process among the pretreatment processes. In addition, the mordant used in the mordant step constituting the present invention is a commonly used mordant, preferably aluminum sulfate potassium as the mordant. At this time, the mordant is used as a mordant solution by dissolving potassium aluminum sulfate in water at room temperature to contain 1 to 5% by weight.

At this time, when the mordant solution in which the aluminum sulfate potassium sulfate used as the mordant is dissolved contains less than 1% by weight of potassium aluminum sulfate, the concentration of the dyed color becomes lighter, and when it exceeds 5% by weight, the mordant padding (Padding ) And after aging, the phenomenon of dropping off of the mordant, which is unreacted, occurs, resulting in an increase in the amount of mordant, resulting in waste.

According to the present invention, the natural dye used in the dye padding is a madder.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, the examples described below are examples for explaining the present invention, and the present invention is not limited to the following examples, and any modifications can be made by those skilled in the art within the scope of the invention described in the claims.

[Example]

Saengwon Foundation: CM 40’S SINGLE

Pretreatment: CM 40'S SINGLE SILKET Pretreatment

Mordant: potassium aluminum sulfate

Mordant solution: Prepared by dissolving potassium aluminum sulfate in water at room temperature to contain 1 to 5% by weight.

Natural dye: madder

Natural dye solution ratio: 1.2% OWS

A raw material was prepared, and the prepared raw material was added to a scouring bath agent containing 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide, as shown in Table 1 below. Continuous scouring by immersion to remove impurities from the fabric under the conditions of a padding speed of 15 to 30 m/min

Alternatively, a raw fabric is prepared, and the prepared fabric is 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a fruit stabilizer, 1 to 2% by weight of a refining agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide 15 to 30 m/min by bathing in a bleaching agent containing

Alternatively, a raw fabric is prepared, and the prepared fabric is 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a fruit stabilizer, 1 to 2% by weight of a refining agent, 1% by weight of a water purification agent, 1% by weight of an absorbent, and 10 to 40% by weight of sodium hydroxide % to a silket processing device equipped with a silket processing agent at a padding speed of 15 to 30 m/min to process the silk and perform any one process selected from pre-treatment of the raw fabric.

In the aging process, the fabric after the padding process is rotated in a place where the room temperature is maintained so that the pretreatment liquid buried in the fabric does not flow downward, and aged for 0 to 24 hours under conditions of a temperature of 20 to 30 ° C.

The aged fabric was subjected to a water washing process by passing it through continuous water centuries. In the specific water washing process, the aged fabric is steamed in a steam treatment machine at a steam temperature of 25 to 100 ° C and a transfer speed of 15 to 25 m / min for 5 to 10 minutes, and then washed with washing water at 95 ± 5 ° C. By doing so, the fabric was pretreated.

The fabric on which the pretreatment process is completed is dried in a tenter at a temperature of 180 to 195 ° C. The dried pre-treated fabric is treated with a mordant solution in a mordant solution.

At this time, the prepared aluminum sulfate potassium solution was used as the mordant, and the mordant treatment was performed at a PADDING speed of 15 to 30 m/min at room temperature.

After the mordant treatment, it is aged for 12 hours in an aging room, washed with water maintaining a temperature of 95 ± 5 ° C. to remove residual mordant, and then dried at a temperature range of 180 to 195 ° C.

The dried, mordant-treated fabric is immersed in a dye container filled with natural dyes to complete dyeing by padding with natural dyes, and then a water washing step is performed to wash off unfixed dyes.

condition refinement bleaching SILKET hydrogen peroxide 0 2-5% 2-5% fruit stabilizer 0 1-3% 1-3% refiner 1-2% 1-2% 1-2% water purifier One% One% One% absorbent 0.1% 0.1% One% sodium hydroxide 1-2% 1-2% 10-40% PADDING SPEED 15~30m/min 15~30m/min 15~30m/min

As a result of preparing three samples of the dyed fabric and testing each sample for color difference (K / S) at a wavelength of 520 nm, as shown in FIG. 1, a K / S value of 3.361 was obtained.

A fastness test of the dyed fabric of the above example was performed.

Washing fastness (KS K ISO 105-C06: 2010, 40℃, 30 minutes, 0.4% detergent, 10 beads): grade

The results are as follows.

* Discoloration: 4-5

* pollution

- Acetate 4-5

- Scenes 4-5

- Polyamide 4-5

- Polyester 4-5

- Acrylic 4-5

- Mo 4-5

Referring to Korean Patent Registration No. 10-1380374, which is a prior art, 'Dyeing method of natural dyes using CPB process', the color expression of the dyed fabric according to the above embodiment was compared with the conventional method of post-mordanting treatment. The results are as shown in Table 2 below.

item prior art Example Material CM 40’S SINGLE SILKET CM 40’S SINGLE SILKET dyes madder madder dye concentration 4% OWS 1.2% OWS mordant potassium aluminum sulfate potassium aluminum sulfate mordant concentration 3% OWS 1% OWS color expression
(K/S) up to 0.29

3.36

As shown in Table 3, in the present invention, despite the low concentration of dye and mordant, it can be seen that the difference in color expressed is 11.5 times different. In general, the mordant is Al, Fe depending on the natural dye used. , Cu, etc. are used a lot, and even with the same natural dye, the color comes out differently depending on the mordant used.

In this example, Al was selected as a mordant according to the madder dye, and a mordant solution was prepared and used by dissolving commercially available potassium aluminum sulfate (alum).

These mordants always have fluidity at the appropriate concentration of the mordants depending on the fabric and natural dyes.

The proper concentration of the mordant for the madder dye in the CM 40'S SINGLE SILKET fabric used as an example in the present invention is to use a mordant solution dissolved in water at room temperature to contain 1% by weight of potassium aluminum sulfate.

As a result of the test, when the concentration is lower than this, the color concentration to be dyed becomes light, and when it is high, the amount of the mordant that is unreacted and eliminated during washing with water after padding of the mordant + aging increases, which can cause waste.

That is, if there is an appropriate mordant concentration attached to the fabric, and if less than the mordant is entered, the color will appear light, and if more than the appropriate mordant is entered, the amount of unattached mordant increases, resulting in the phenomenon of falling off during washing. .

As a result of the above, the present invention can obtain a deep color even when a small amount of dye and mordant is used in mass production, so direct costs can be saved, which is a great advantage considering that natural dyes are expensive.

Claims (4)

A pretreatment step of preparing raw fabric and removing impurities from the fabric; and,
A tenter process of tentering and drying the pretreated fabric in a tenter under a temperature condition of 190 ± 5 ° C; and
A mordant step of padding the dried fabric with a mordant;
An aging process of aging the mordant-treated fabric for 12 hours or more;
A washing and drying step of washing the aged fabric with water and then drying it under a temperature condition of 180 to 195 ° C; and
A natural dye dyeing process of padding the mordant-treated fabric with natural dye to fix the dye; and
After the dyeing of the natural dye is completed, a water washing step for removing unfixed dye; and
Dyeing method of natural dyes using the CPB process, characterized in that it comprises a post-processing step of processing the fabric on which the water washing step is completed.
According to claim 1,
The pretreatment process consists of a padding process, a aging process, and a continuous water washing process,
In the padding process, the prepared raw fabric is immersed in a scouring bath agent containing 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide at a padding speed of 15 to 30 m/min. Continuous scouring to remove impurities from the fabric under the condition,
Alternatively, the prepared raw fabric is added to a bleaching agent containing 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a water stabilizer, 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 0.1% by weight of an absorbent, and 1 to 2% by weight of sodium hydroxide Bleach with a padding speed condition of 15 to 30 m/min by bathing,
Alternatively, the prepared raw fabric is processed into a silket containing 2 to 5% by weight of hydrogen peroxide, 1 to 3% by weight of a water stabilizer, 1 to 2% by weight of a scouring agent, 1% by weight of a water purification agent, 1% by weight of an absorbent, and 10 to 40% by weight of sodium hydroxide It is made by any one process selected from among the processes of supplying the silket at a padding speed of 15 to 30 m/min to the silket processing device equipped with the agent,
In the aging process, the fabric after the padding process is rotated in a place where the room temperature is maintained so that the pretreatment liquid buried in the fabric does not flow downward, and aged for 0 to 24 hours under conditions of a temperature of 20 to 30 ° C.
In the continuous water washing process, the aged fabric is steamed for 5 minutes to 10 minutes under conditions of a steam temperature of 25 to 100 ° C and a transfer speed of 15 to 25 m / min, and then washed with washing water at 95 ± 5 ° C. Dyeing method of natural dyes using the CPB process, characterized in that.
According to claim 1,
The mordant is a dyeing method of natural dyes using a CPB process, characterized in that for use as a mordant solution by dissolving potassium aluminum sulfate in water at room temperature to contain 1 to 5% by weight.
According to claim 1,
The natural dye is a dyeing method of natural dyes using a CPB process, characterized in that the madder.

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