KR101720169B1 - Dnyeing method for natural fabric using natural dye stuffs and the natural dyeing fabric - Google Patents

Abstract

The present invention relates to a method of dyeing natural fabric by using natural dyestuff and natural dyed fabric dyed thereby. According to the present invention, since natural fabric treated by ultrasonic wave is dyed by using natural dyestuff powder of a nanoparticle size, the natural dyestuff is effectively adsorbed to the natural fabric in a short time and dye does almost not come out during washing, so excellent fastness is provided. Moreover, since chemical materials, such as a scouring agent and a mordant agent are not used during dyeing, problems such as environmental pollution, and skin allergy due to chemical materials can be prevented. Therefore, the natural dyed fabric can be used for manufacturing an operating gown, a patient gown, bandage, gauze, clothes for old persons and infants, a diaper, underwear, shirts, a necktie, a scarf, a handkerchief, a blouse, bed clothes, a curtain, a towel, a tablecloth, sportswear, etc.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing natural fabrics using natural dyes,

The present invention relates to a method of dyeing natural fabrics using natural dyes and a dyeing of natural dyed fabrics using the same.

As the quality of life improves, interest in lifestyle in clothing, clothing and shelter is changing. As a result, demand for fiber increases and awareness of consumers' various needs and quality is improved. It is urgently required to develop a fiber product, especially a natural fiber, which is superior in view of the above. In recent years, as the interest in the environmental pollution caused by the wastewater generated during the dyeing process using the chemical dye and the occurrence of the skin allergy by the chemical dye during the dyeing process has increased, And natural dyes using natural dyes have been preferred (Song and Baek, 2006, The Korean Society for Living Science, 17 (1): 79-86).

Natural dyes are separated from animals (rocks, greenery layers, murex, cochinil, etc.), minerals (loess, charcoal) and plants that exist in nature (natural wool, onion, gardenia, safflower, (Asbestos, cashmere, etc.), vegetable fabrics (cotton, cotton, flax, etc.), mineral fabrics (asbestos) and artificial fabrics are colored with natural and soft colors And has an advantage of having antibacterial, deodorizing and antiallergic properties by natural materials.

Natural dyeing work processes are usually divided into fiber scouring, dye extraction, dyeing and mordanting processes. Specifically, the scouring of the fibers is generally performed by treating the scouring agent to remove impurities except for the dye contained in the fiber product (fabric), immersing the scouring agent in the warm water for about 2 to 3 hours, and then performing the treatment several times. The dye extraction is carried out by boiling 2-3 times in a steamer after finely chopping natural salt. The dyeing is performed by immersing the fabric refined in the extracted dye for 20 to 30 minutes. After the dyeing process, the mordant is administered so that the dye can be more adhered to the fabric. At this time, in order to dye the fabric into a desired color, the dyeing and mordant treatment processes should be repeated 3 to 5 times as one set.

However, the amount of dye components extracted from natural materials is so small that a large amount of fabric can not be dyed, and dyeing takes a long time. Natural dyes are generally stored in liquid form through hot water extraction, so they can not be stored for a long period of time. In addition, the natural dyes can not be stored for a long period of time, It is easy to get dyed or dyed with different colors every time the dyed material is changed. Especially, when the dyed fabric is dyed with natural dyes, low fastness to sunlight, washing, sweat and dry cleaning is overcome As a difficult problem, it acts as a big obstacle to natural dye dyeing technique.

Recently, the development of powder dyes capable of dyeing with ease has been developed by the general public as well (Korean Patent No. 10-0267169; Korean Patent No. 10-0485032; Korean Patent No. 10-1139384; Korea Patent No. 10-0993414). However, the powdered natural dyes have poor solubility in water at a temperature of 50 ° C or less, and are not uniformly dyed when they are dyed because of their large size and unevenness. In addition, since an alkali agent is used to enhance the coloring power of the dye, there is a problem that it is not suitable for dyeing an animal textile which is weak in alkali.

Accordingly, the inventors of the present invention attempted to develop a new dyeing method that can improve the fastness while showing the color possessed by natural dyestuffs. In the meantime, the present inventors have found that the use of a scouring agent (alkali, surfactant, etc.) It is possible to remove the impurities of animal fibers without using a high-pressure enzyme treatment. By using the nano-sized natural dye powder, it is possible to increase the dyeing amount of the dye to the fabric during dyeing and to obtain natural fibers having improved washing fastness And the need for a specialized fabric capable of maintaining the color due to high color fastness even in frequent washing has been raised, and the present invention has been completed.

It is an object of the present invention to provide a method of dyeing natural fabrics in which the dyeing amount and fastness of dye are improved by ultrasonication of natural fabrics and dyeing using nanomolecularized vegetable dyes through ultrahigh pressure enzyme treatment.

It is another object of the present invention to provide a natural dyeing fabric stained by the above-mentioned dyeing method.

The present invention provides a method of natural dyeing characterized in that it comprises the following steps:

a) a refining step in which a natural fabric is soaked in water and ultrasonically treated;

b) preparation of a natural dye powder which is hydrothermally treated with a vegetable salt and then hydrolyzed with an enzymatic hydrolysis enzyme, followed by pulverization;

c) dyeing the natural dye powder in step b) by dissolving it in water at room temperature to prepare a natural dye liquid, and dipping the natural fabric of step a) in the natural dye liquid; And

d) a post-treatment step of washing and drying the dyed natural fabric in step c).

Hereinafter, the natural dyeing method of the natural fabrics of the present invention will be described in detail as follows.

a) Refining step in which the natural fabric is immersed in water and then sonicated.

Specifically, the step (a) of the present invention is a refining step of removing impurities of a natural fabric by ultrasonication to a natural fabric. In the ultrasonic treatment, impurities or cuticles attached to the fabric surface are removed in a short time, Polysaccharides and the like, it is possible to increase the amount of salt to be added to the fabric, and to keep the texture and physical properties inherent to the fabric as it is.

The ultrasonic treatment is carried out by immersing the natural fabrics in water and for 2 to 4 hours, preferably 3 to 10 hours, in the upper and lower portions of the sound waves having a frequency of 15 KHz or more, preferably 15 to 30 KHz and more preferably 17 to 28 KHz, Lt; / RTI > If an animal tissue is sonicated at less than 15 KHz or sonicated for less than 2 hours, it will not break the bond between the structural proteins of the animal tissue and may not be sonicated at more than 30 KHz or sonicated for more than 4 hours There is little increase in the efficiency of cutting the bond between the structural proteins of the animal tissue as compared with the sound wave having the lower frequency, which is uneconomical.

The natural fabrics used in the present invention are obtained from plants, animals or minerals, and any natural fabric can be used as long as it can be directly used as a covering material. For example, the fabric obtained from the plant may be selected from the group consisting of seed parent fibers (cotton, canvas, and pale), bast fibers (flax, jersey, jute, hemp), flax fibers (Manila hemp, Coir). ≪ / RTI > The fabric obtained from the animal may be a fabric made of at least one selected from the group consisting of silk (silkworm, silk), wool (wool, wool, mohair, cashmere, camel, rabbit) and fur . The fabric obtained from the mineral may be asbestos.

b) a step of preparing a natural dye powder.

Specifically, step (b) of the present invention comprises hydrothermally treating a plant salt, adding a decomposing enzyme, subjecting the enzyme to an ultrahigh pressure enzyme treatment at a specific temperature, pressure and time, and pulverizing the powder to prepare a natural dye powder having nano- to be.

In the present invention, the plant salt material is not limited to a plant that can extract pigments such as yellow, red, black, and blue. Examples of the plant material include, but are not limited to, rice bran, rice bran, yellow rice, onion, marigold, Safflower, succulent, bitter sunny, green tea leaf, duck, bilberry, persimmon or the like.

In the present invention, the hydrothermal treatment is a step of extracting a pigment from a vegetable coloring material. The vegetable coloring material is cut into 3 to 5 cm in the longitudinal direction, and the vegetable coloring matter is added to the water. The vegetable coloring material is boiled at 90 to 110 ° C for 2 to 5 hours . At this time, the content of the vegetable salt may vary depending on the kind of the salt.

In the present invention, the glucosease is selected from the group consisting of Viscozyme, Celluclast, Amyloglucosidase (AMG), Termamyl and Ultraflo Or a mixture of two or more.

The sugar chain degrading enzyme of the present invention has an advantage of facilitating the pulverization by easily removing the sugar molecule bound to the pigment extracted from the plant salt.

In the present invention, the saccharide-degrading enzyme is preferably used in an amount of 0.01 to 1 part by weight, preferably 0.01 to 0.5 part by weight, based on 100 parts by weight of the hydrothermally treated plant material. If the content of the glucosease is less than 0.01 part by weight, the sugar molecules bound to the dye can not be easily removed and the powdering process can not be easily performed. If the content of the glucosease is more than 1 part by weight, And the yield of the extracted natural dyes is insignificant.

In the present invention, the ultrahigh pressure enzyme treatment is very effective in hydrolyzing a substrate by enzymes for a predetermined time at a certain pressure and at a specific temperature to enhance the dyeing amount of the dye on the fabric during dyeing.

Specifically, the specific temperature for the ultrahigh pressure enzyme treatment is 40 to 60 DEG C, preferably 45 to 55 DEG C, more preferably 50 DEG C, and the ultrahigh pressure is 100 to 300 MPa, preferably 150 to 250 MPa, 200 MPa, and the period of time is 1 to 10 minutes, preferably 3 to 8 minutes, more preferably 5 minutes. The enzyme is the above-described saccharide-degrading enzyme, and the substrate is a hydrothermally treated plant salt. In the conditions other than the above conditions, there is a problem in that it takes a long time to extract the pigment from the vegetable color material or the sugar molecule (viscous) bound to the pigment is not completely removed.

In the present invention, the pulverization means that the natural dye liquid extracted through the ultrahigh pressure enzyme treatment is filtered and dried to produce powder. In this case, the drying can be performed by any method that removes moisture of the natural dye liquid. For example, freeze drying, spray drying, fluidized bed drying and vacuum drying may be used. Preferably, .

The natural dye powder prepared according to the present invention is uniform and has a particle size of 100 nm to 1,000 nm. Therefore, the natural dye powder is easily dissolved in water at 50 ° C or less and is effectively absorbed in the fabric without causing a change in the dye component, And since the natural dye liquid is strongly adsorbed to the fabric, the washing solution is hardly removed even in washing, and washing fastness can be improved.

c) dyeing the natural fabric.

Specifically, in step c) of the present invention, the natural dye powder prepared in step b) is dissolved in water to prepare a natural salt solution. Then, the natural ultrasonic treated fabric is put into the natural salt solution, Is a dyeing step.

In the present invention, the time for immersing the natural fabric in the natural salt solution is preferably 5 to 15 minutes. In the general natural dye dyeing, it is required to be dipped for at least 20 to 30 minutes to develop a desired color. In the present invention, since the ultrasonic treatment of natural fabrics and the use of the nanomolecularized natural dye powder are used, 5 to 15 minutes, preferably 8 To 10 minutes, the dye is sufficiently absorbed by the fabric, and dyeing is possible in a short time.

d) a post-treatment step of washing and drying the dyed fabric.

In the present invention, the washing and drying are not particularly limited as long as the dye is applied to the dyed fabrics while removing impurities or unstably dyed natural dyes from the dyed fabrics. For example, the dyed fabrics It may be washed three to five times in running water, dehydrated and then dried in a shady, windy environment.

In another aspect, the present invention provides a natural dyeing fabric dyed by the above dyeing method.

The natural dyes dyed according to the present invention can effectively absorb natural dyes on natural fabrics and provide excellent fastness, as well as solving problems such as environmental pollution and the occurrence of skin allergy due to chemical substances. Therefore, Shirt, tie, scarf, handkerchief, blouse, bedclothes, curtain, cloth, towel, tablecloth, and sportswear. But is not limited thereto.

According to the present invention, natural dye is ultrasonically treated with nanomolecularized natural dye powder to effectively absorb natural dye into fabric in a short period of time. In addition, since there is an advantage of solving the problems such as environmental pollution and skin allergy occurrence caused by chemical substances because no chemical substance such as scouring agent or mordanting agent is used in dyeing, the natural dyeing fabric dyed according to the present invention can be used in surgical ward, Shirt, tie, scarf, handkerchief, blouse, bedclothes, curtain, cloth, towel, tablecloth and sportswear, etc.

Hereinafter, the present invention will be described in more detail by way of examples and the like. It is to be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be obvious to you.

Example 1: Preparation of Natural Dye Powder According to the Invention

After adding 0.3 g of Viscozyme to 100 ml of the extracted juice, it was treated with ultrahigh pressure enzyme treatment at a pressure of 200 MPa and maintained at a temperature of 50 ° C. After the addition of 2 L of water to 1.2 kg of gardenia and heating (hydrothermal treatment) Placed in the chamber of the apparatus and treated for 5 minutes. Thereafter, the supersaturated enzyme-treated salt solution was lyophilized and pulverized to prepare a powdered natural dye having a diameter of 100 to 1,000 nm.

Example  2: Manufacture of dyed natural fabrics using natural dye powders according to the invention

The wool was placed in water and ultrasonicated to produce a frequency of 20 kHz.

Then, 10 g of the natural dye powder prepared in Example 1 was dissolved in 100 ml of water to prepare a natural salt solution. The ultrasonic treated wool, machachine or asbestos was dipped in the natural salt solution and dyed for 10 minutes.

Then, the dyed wool, wool or asbestos from the natural salt solution was washed twice in the running water, and then dried to dye natural fabrics.

Comparative Example 1:

The natural fabric was dyed in the same manner as in Example 2, except that the wool, machachane, or asbestos was not subjected to ultrasonic treatment in Example 2 above.

Comparative Example 2:

The natural fabric was dyed in the same manner as in Example 2, except that 2 L of water was added to 1.2 kg of the gardenia in Example 2 and heated (hydrothermally treated) and the extracted salt solution was used to dye the wool.

Test Example 1 Measurement of Salt Loading (K / S)

The K / S value was measured by the following method in order to indirectly confirm the degree of dye attachment of the dyed natural fabrics of Example 2, Comparative Example 1 or Comparative Example 2. The reflectance (R, Reflectance) was measured using a spectrophotometer (Color-Eye 7000A, Machbeth, USA), and the K / S value was obtained by substituting this value into the equation K / S = (1-R) ² / 2R. The results are shown in Table 1.

Test Example 2: Wash fastness measurement

The washing fastness of the dyed natural fabrics of Example 2, Comparative Example 1 or Comparative Example 2 was measured according to the KSK 0430 A-1 method in order to confirm the degree of dye dropout after washing. The results are shown in Table 1.

Salt loading (K / S) Wash fastness Exterior Example 2 8.2 5 Great Comparative Example 1 1.5 3 usually Comparative Example 2 1.6 3 usually

As shown in Table 1, the salt loading on the dyed wool according to the method of Example 2 was excellent as 8.2, and the washing fastness was also excellent.

Claims (7)

A method of dyeing a natural fabric, comprising the steps of:
a) a refining step in which a natural fabric is soaked in water and ultrasonically treated;
b) preparing a natural dye powder by hydrothermal treatment of the plant material, adding the saccharide degrading enzyme, treating the mixture at a temperature of 40 to 60 ° C and a pressure of 100 to 300 MPa for 1 to 10 minutes, followed by pulverization;
c) dyeing the natural dye powder in step b) by dissolving it in water at room temperature to prepare a natural dye liquid, and dipping the natural fabric of step a) in the natural dye liquid; And
d) a post-treatment step of washing and drying the dyed natural fabric in step c).
The method according to claim 1, wherein the ultrasonic treatment in step (a) comprises sonic waves having a frequency of 15 KHz to 30 KHz.
[3] The method according to claim 1, wherein in step b), the saccharide degrading enzyme is used in an amount of 0.01 to 1 part by weight based on 100 parts by weight of the hydrothermally treated plant salt.
delete The method according to claim 1, wherein the dyeing in step c) is performed for 5 to 15 minutes.
delete 6. The method of claim 5,
The natural dyeing fabric is characterized in that it is used for manufacturing surgical gowns, patient clothes, bandages, gauzes, woolen clothes, baby clothes, diapers, underwear, shirts, ties, scarves, handkerchiefs, blouses, bedclothes, curtains, cloths, towels, tablecloths, By weight.