KR101231050B1 - Dyeing method of rayon-polyester union cloth - Google Patents

Abstract

The present invention provides a method for dyeing a rayon-normal pressure chlorophilic polyester knitted fabric characterized in that a rayon-normal pressure hydrogen fluoride polyester woven fabric is dipped in a mixing bath of a reactive dye and a disperse dye having triazine as a reactor.
According to the dyeing method of the present invention, it is possible to dye the rayon-normal pressure hydrogenated polyester fiber woven fabric in one step without modifying the rayon fiber, while ensuring the color matching of the woven fabric composed of the different fiber.

Description

DYEING METHOD OF RAYON-POLYESTER UNION CLOTH [0002]

The present invention relates to a method of dyeing a rayon-polyester textile material, and more particularly, to a method of dyeing a rayon-polyester textile material having excellent color matching by using reactive dyes and disperse dyes having triazine as a reactor.

Rayon fibers are soft and glossy enough to be called artificial dogs, and sweat absorption / release is also fast, making them widely used as cloth materials. However, since the rayon fiber is limited in water washing and is weak in strength, it is often torn and mixed with other materials such as polyester, so that it is usually used as a cloth for woven fabrics.

However, since the rayon fibers and the polyester fibers blended therewith have different dyeing conditions, there is a limitation in producing them from a woven fabric and developing them. That is, the rayon fibers are usually dyed at a temperature of about 80 ° C. using reactive dyes, while the polyester is usually carried out at a high temperature / high pressure of up to 130, using disperse dyes. Therefore, the dyeing of the above-mentioned textiles requires dyeing twice to dye the polyester fibers after dyeing the rayon fibers, which is disadvantageous in terms of cost. In addition, as described above, since the polyester is dyed under a high temperature / high pressure, the rayon fiber is denatured in this process, so that the unique luster and soft touch are lost, and the color of the rayon fiber is also discolored .

Therefore, the inventors of the present invention have found that when a triazine dye is used as a reactive dye in a cloth knitted with an ordinary pressure rayon fiber and an ordinary rayon fiber, and a disperse dye combined with an azo or quinoline disperse dye is used, The present inventors confirmed that it is possible to secure the same color even when dyed in a relatively mild condition.

An object of the present invention is to provide a dyeing method of a rayon-polyester textile material having superior color matching property by using a reactive dye having triazine as a reactor and an azo-type or quinoline-based disperse dye as a raw material knitted with normal- .

In order to achieve the above object, the dyeing method of the present invention is characterized in that a rayon-normal pressure mercury-free polyester textile fabric is dipped in a mixing bath of a triazine reactive dye and a disperse dye and then dried.

The triazine-based dye may be at least one selected from the group consisting of the following chemical formulas (1), (2) and (3)

[Chemical Formula 1]

(2)

(3)

The disperse dye is preferably an azo dye, an anthraquinone dye or a mixture thereof.

The azo-based dye may be a compound represented by the following Formula 4:

[Chemical Formula 4]

Wherein R ₁ and R ₂ are independently H or a C 1 to C 10 linear or branched saturated hydrocarbon.

The anthraquinone-based dye may be at least one selected from the group consisting of compounds represented by the following formulas (5) and (6)

[Chemical Formula 5]

In the above formula, X is a halogen element such as Cl, Br or the like.

The pH of the mixing bath is preferably 5 to 9.

It is preferable that the immersion salt is performed at a temperature of 90 to 110 DEG C for 10 to 100 minutes.

According to the dyeing method of the present invention, even when the rayon-polyester fiber fabric is dyed in one step without denaturation of the rayon fiber, the same color consistency of the fabric made of the heterogeneous fiber can be ensured.

FIG. 1 is a photograph showing the dyeability of a coated fabric according to the first embodiment of the present invention. FIG.
FIG. 2 is a photograph showing the dyeability of a coated fabric according to the second embodiment of the present invention. FIG.
FIG. 3 is a photograph of the evaluation of dyeability of a coated fabric according to a third embodiment of the present invention, which is a comparative evaluation image of a fabric using normal pressure polyester and a fabric using normal pressure polyester.

The method for dyeing a rayon-polyester textile material of the present invention is characterized in that a rayon-normal pressure hydrogenated polyester textile material is dipped in a mixed bath of a reactive dye and a disperse dye having triazine as a reactor and then dried.

The atmospheric pressure phosphorescent polyester fiber used as the rayon-polyester textile fabric in the present invention refers to a fiber capable of dyeing at normal pressure, which is spun using a polyester copolymer as a raw material, and includes not only flammable fibers but also lead-free fibers. The term "polyester copolymer" as used herein means a copolymer obtained by copolymerizing terephthalic acid and a diol, wherein the diol component contains ethylene glycol as a main component and a polyhydric alcohol such as triethylene glycol, tetraethylene glycol or pentaethylene glycol is added. The copolymerization ratio of polyhydric alcohols other than ethylene glycol is usually from 5 to 20%.

In the present invention, the term " rayon " includes all the fibers produced by regenerating the cellulose fiber regardless of its origin. On the other hand, interlocks, single piquets, double-faced piquets, firic tissues and the like were used for the textiles dyed by the dyeing method of the present invention.

In the dyeing method of the present invention, the dye having triazine as a reactor is used for dyeing rayon fiber, which is one component constituting the fabric. In order to dye the rayon fibers, various reactive dyes having triazine, pyrimidine, quinoxaline, active double bonds, acid azide and the like as a reactor are generally used. Among them, in the present invention, a triazine-based dye which is stable even at a temperature of 90 or more, is stable even in neutrality, and can exhibit color is used. Examples of the dye having triazine as a reactor include compounds represented by the following formulas. These may be used alone or in combination of two or more components.

[Chemical Formula 1]

(2)

(3)

.

.

Meanwhile, in the present invention, the disperse dye is used for dyeing polyester fibers. As the dyes used for this purpose, azo dyes, anthraquinone dyes or mixtures thereof having excellent neutral stability may be used.

Examples of the azo dyes include compounds represented by the following formula (4).

[Chemical Formula 4]

Wherein R ₁ and R ₂ are independently H or a C 1 to C 10 linear or branched saturated hydrocarbon.

Further, the anthraquinone dyes may be at least one selected from the group consisting of compounds represented by the following formulas (5) and (6);

[Chemical Formula 5]

In the above formula, X is a halogen element such as Cl, Br or the like.

In the dyeing method of the present invention, it is used to prevent stains due to rapid dyeing of the rayon fibers, and salts such as Nacl, Na ₂ SO ₄ and the like can be used.

The pH of the mixing bath is preferably 5 to 9, more preferably 6 to 8. When the pH of the mixing bath is less than 5, the amount of the polyester to be dyed decreases, which is not preferable. When the pH of the mixing bath is more than 9, the amount of polyester to be dyed decreases. To adjust the pH, a buffer solution may be used if necessary.

In addition, it is preferable that the immersion salt is performed at a temperature of 90 to 110 ° C for 10 to 100 minutes. If the temperature of the dipping is less than 90 캜, the dye is not sufficiently wetted, which is not preferable. If the temperature exceeds 110 캜, the physical properties of the rayon fiber are deteriorated. If the dipping time is less than 10 minutes, the dye is not sufficiently wetted and does not desirably wet. If it exceeds 100 minutes, the physical properties of the rayon fiber are deteriorated.

On the other hand, the drying after the salt dip can be carried out by a conventional method in the art. Specifically, there is a method of performing heat fixation in a tenter of 170-200 ° C. after drying in a net drier at 130-170 ° C., dehydration in a centrifugal dehydrator, and simultaneous drying and thermal fixation in a tenter at 180-200 ° C. .

In the present specification, the term " woven fabric " may be different from the conventional meaning, but it will be apparent to those skilled in the art that knitted fabrics or nonwoven fabrics knitted or woven by mixing rayon and polyester fibers are collectively referred to.

Hereinafter, the present invention will be described in more detail with reference to Examples. This is for further illustrating the present invention, and the scope of the present invention is not limited to these examples.

Example 1: Pigmented dyeing

1. Preparation of Dye Mixing Bath

First, a mixed bath of a reactive dye and a disperse dye was prepared at the composition and concentration shown in Table 1 below:

dyes unit Red color yellow Blue Earthy division chief ingredient product no Reactivity
dyes Formula 1 KYR Yellow CN-EX o.w.f 0.30 0.138 (2) KYR Red CN-3B o.w.f 0.30 0.039 (3) KYR Blue CN-MG o.w.f 0.30 0.123 synthesis 0.30 0.30 0.30 0.30 Dispersion
dyes Formula 4 KM Yellow AQ-LE o.w.f 0.0052 0.126 0.0117 0.0489 Formula 5 KM Red AQ-LE o.w.f 0.3120 0.012 0.0204 0.0495 6 KM Blue AQ-LE o.w.f 0.1330 0.0486 synthesis 0.3172 0.138 0.1351 0.1470 sulphate of soda g / l 20 20 20 20 Buffer solution (pH = 7) g / l 1.0 1.0 1.0 1.0

- Disperse dye: Mitsui Toatsu Co., Ltd.

- Reactive dye: manufactured by Japan Gyaron Co., Ltd.

-Buffer solution: manufactured by Mdohman Korea, DiaSupport, KH ₂ PO ₄ / Na ₂ HPO ₄ buffer solution

2. Dyed fabrics

In a mixing bath having the above composition, a knitted fabric, a kneaded cloth and a buffer solution were directly knitted into a circular knitted fabric with 120 denier of 40 filaments of rayon and 75 denier of 36 filament of atmospheric pressure fluorine polyester, and the mixture was heated from 40 ° C to 100 ° C over 25 minutes And then stained at 100 DEG C for 40 minutes and cooled again to 40 DEG C over 20 minutes.

In the drying process, dehydration was performed in a centrifugal dehydrator, followed by simultaneous drying and thermal fixation in a tenter at 180 ° C.

On the other hand, the target textiles are interlock, single pique, interlock (composite leadless), furice (composite leadless), single pique (composite leadless), double sided pique (composite leadless), interlock The fabric was evaluated using a single pique (composite false) and a double-faced pique (composite false).

3. Evaluation

FIG. 1 is a photograph showing the result of dyeing four colors of red, blue, yellow and earth colors of pale colors for each fabric in Example 1. FIG. 1 is a photograph of each material sampled and scanned using a scanner.

Referring to FIG. 1, in the case of a single composition of rayon and normal pressure-modified polyester fiber, a color difference appears in all of red, blue, yellow and earthy colors. However, in the case of a woven fabric in which these two fibers are alternately knitted in a ratio of 1: Interlock, and single pique, the difference in dyeing is not fully visible due to the scattering effect of each fiber material.

Example 2: Dichroic dyeing

Experiments were carried out in the same manner as in Example 1 except that a mixed bath of a reactive dye and a disperse dye was prepared at the composition and concentration shown in the following Table 2 and the knitted fabric was soaked.

dyes unit Red color yellow Blue Gray color Reactivity
dyes Formula 1 KYR Yellow CN-EX o.w.f 0.30 0.138 (2) KYR Red CN-3B o.w.f 0.30 0.039 (3) KYR Blue CN-MG o.w.f 0.30 0.123 synthesis 0.30 0.30 0.30 0.30 Dispersion
dyes Formula 4 KM Yellow AQ-LE o.w.f 0.0052 0.126 0.0117 0.0489 Formula 5 KM Red AQ-LE o.w.f 0.3120 0.012 0.0204 0.0495 6 KM Blue AQ-LE o.w.f 0.1330 0.0486 synthesis 0.3172 0.138 0.1351 0.1470 salt g / l 20 20 20 20 Buffer solution (pH = 7) g / l 1.0 1.0 1.0 1.0

FIG. 2 is a photograph showing the dyeability of a coated fabric according to the second embodiment of the present invention. FIG. Referring to FIG. 2, there is found a difference in dyeability between the different materials of the rayon and the normal pressure chlorophyll polyester fiber, as in the case of the pale color. However, we could not find any problems due to the difference in dyeability between different materials in interlock, single pique, and other tissues. This is probably due to the scattering effect between each fiber material in the tissue.

Example 3: Comparative evaluation with general polyester woven fabrics

Except that the fabric was knitted in an interlock structure with rayon fibers and normal pressure chemically adsorbed polyester fibers and the fabric was dyed with the dye composition as shown in Table 3 using a rayon fiber and a fabric knitted into an interlocking structure with a normal polyethylene terephthalate fiber. And then stained. The dye composition is shown in Table 3 below.

dyes Blue Red color black division chief ingredient product no Reactivity
dyes Formula 1 KYR Yellow CN-EX - 0.0900 2.7600 (2) KYR Red CN-3B - 0.5040 0.7800 (3) KYR Blue CN-MG 0.6000 0.0060 2.4600 Dispersion
dyes Formula 4 KM Yellow AQ-LE 0.0585 0.0905 1.956 Formula 5 KM Red AQ-LE 0.1020 1.2900 1.980 6 KM Blue AQ-LE 0.6650 0.0110 1.944 Mallow (g / l) 20 20 80 The buffer solution (g / l) One One One

Photographs comparing dyeing results are shown in FIG. 3 by color. The left side of each color photograph is a fabric using normal polyethylene terephthalate fiber. The right side image shows the case of using atmospheric pressure phosphoric ester fiber. When the polyethylene terephthalate fiber is used, the color is weak and the color difference between the different types of fibers is severe And it was not possible to confirm the color difference between the different kinds of fibers at the same time, when the normal pressure mercury polyester fiber was used.

Claims (7)

A method for dyeing a rayon-polyester woven fabric characterized in that a rayon-normal pressure hydrogenated polyester textile material is dipped in a mixing bath of a reactive dye having triazine as a reactor and an azo or quinoline disperse dye. [2] The method according to claim 1, wherein the reactive dye having triazine as a reactor is at least one selected from the group consisting of the following Chemical Formulas 1, 2 and 3:
[Chemical Formula 1]

(2)

(3)

The method according to claim 1, wherein the disperse dye is an azo dye or an anthraquinone dye or a mixture thereof. 4. The method of dyeing a rayon-polyester textile material according to claim 3, wherein the azo dye is a compound represented by the following formula (4)
[Chemical Formula 4]

Wherein R ₁ and R ₂ are independently H or a C 1 to C 10 linear or branched saturated hydrocarbon. 4. The method of claim 3, wherein the anthraquinone dye is at least one selected from the group consisting of compounds represented by the following formulas (5) and (6)
[Chemical Formula 5]

In the above formula, X is a halogen element including Br and Cl. The method according to claim 1, wherein the pH of the mixing bath is from 5 to 9. The method according to claim 1, wherein the dipping is performed at a temperature of 90 to 110 ° C. for 10 to 100 minutes.

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