KR101199850B1 - Process Of Dyeing Having High Light Fastness For Natural Cellulose Textiles - Google Patents

Abstract

PURPOSE: A dyeing process of high light fastness for a natural cellulose textile is provided to enhance light fastness and to prevent fiber strength reduction. CONSTITUTION: A dyeing process of high light fastness for a natural cellulose textile comprises: a step of dipping the natural cellulose textile fibers in a dyeing solution containing 1-20 g/L of hydrosulfite or 5-20 g/L of thioureadioxide, 0.1-2.0 g/L of leveling agent, 0.1-2.0 g/L of dispersing agent, 1-200 g/L of VAT dye, 1-20 g/L of soda ash or caustic soda(NaOH), and remaining amount of water at 90-130 Deg. C. for 45-60 minutes; a step of cooling and washing the natural cellulose textile fibers at 60-70 Deg. C.; and a step of dipping the natural cellulose textile fibers in a post-treatment solution containing 0.05-0.1 wt% of hydrogen peroxide, 0.05-0.1 wt% of acetic acid, 3-10 wt% of benzophenone-based light fastness enhancing agent or benzotriazine-based light fastness enhancing agent, and remaining amount of water at 90-135 Deg. C. and gradually cooling the natural cellulose textile fibers.

Description

Process of Dyeing Having High Light Fastness For Natural Cellulose Textiles

The present invention relates to a method for dyeing natural cellulosic fibers using bat dye (VAT), which is intended to express a high level of light fastness (sunlight) by peeling away from the conventional dyeing of reactive dyes or direct dyes. .

Hanji fiber or bamboo fiber used in the present invention is a natural cellulose fiber is environmentally friendly and harmless to the human body has been spotlighted as the most suitable fiber material for the recent well-being trend.

The dyeing method of the Hanji fiber or bamboo fiber has a method of dyeing the raw (duck fiber) or the finished fiber, mainly dyeing using natural dyes. Korean Patent Publication Nos. 2003-0018033 and 2007-0008771 refer to the dyeing of Doc fiber using natural dyes such as spines, gardenia, quince, safflower and ocher, but there is a problem of weakness of daylight fastness and wash fastness.

On the other hand, even when using a direct dye applied to cotton fibers wash fastness and daylight fastness was vulnerable, even when using a reactive dye has a problem that does not meet the industrial standards such as automotive interior material properties due to weak light fastness.

Therefore, the present invention overcomes the problems of conventional direct dyes and reactive dyes, and has excellent washing fastness and daylight fastness without the strength degradation of natural cellulose fibers, and can be mass-produced without the need for additional production equipment. The technical task is to provide a new dyeing method.

In order to solve the above technical problem, the present inventors have found that using a salt method, a reducing agent, and a light fastness enhancer of a benzophenone or a benzotriazine-based dye can be used to dye natural cellulose fibers without deteriorating physical properties. It is.

Therefore, according to the present invention, 1 to 20 g / L of hydrosulfite (Na ₂ S ₂ O ₄ ) as a reducing agent or 5 to 20 g / L of thiourea dioxide, 0.1 to 2.0 g / L of leveling agent and 0.1 to 2.0 g / L of dispersant 1, 200 g / l of VAT dye, 1-20 g / l of soda ash (Na ₂ CO ₃ ) or caustic soda (NaOH) and the remainder of the salt mixture mixed with water at a rate of 1-1.5 ° C./minute After immersing the natural cellulose fibers in the salt solution at 90-135 ℃ for 45-60 minutes, and then cooled to 60-70 ℃ at a rate of -2.0 ~ -1.5 ℃ / min, washed with water to finish the dyeing,

Hydrogen peroxide (H ₂ 0 ₂ ) 0.05 ~ 0.1% by weight, glacial acetic acid (CH ₃ COOH) 0.05 ~ 0.1% by weight, benzophenone-based light fastness enhancer or benzotriazine-based light fastness enhancer, and the balance is mixed with water After immersing in a post-treatment liquid of 90 ~ 135 ℃, there is provided a high light fastness dyeing method of natural cellulose fibers characterized by slow cooling and washing with water.

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

The present invention is a method for dyeing natural cellulose fibers to express a high level of light fastness (sunlight) by using a bat (VAT) dye to escape from the dye-oriented color reproduction of the existing reactive dyes or direct dyes It is about.

The dyeing method of the natural cellulose fibers of the present invention is a hydrosulfite (Na ₂ S ₂ O ₄ ) 1 ~ 20 g / L or thiourea dioxide 5 ~ 20 g / L, a leveling agent 0.1 ~ 2.0 g / L, a dispersant 0.1 to 2.0 g / l, VAT dye 1 to 200 g / l, soda ash (Na ₂ CO ₃ ) or caustic soda (NaOH) 1 to 20 g / l and the remainder was immersed in the mixed salt solution and then cooled slowly It cools and washes with water.

The natural cellulose fibers of the present invention is preferably Hanji fiber or bamboo fiber. First, the salt solution of the present invention contains a reducing agent of hydrosulfite (Na ₂ S ₂ O ₄ ) or thiourea dioxide to reduce the insoluble VAT dye to a water-soluble dye to facilitate dyeing into natural cellulose fibers.

Reducing conditions for chemical bonding of the fiber immersed in the salt solution and the VAT dye occur smoothly under alkaline conditions, thereby increasing the reducibility of the VAT dye by containing alkali such as soda ash and caustic soda. It is preferable to adjust pH to 8.0-11.0. If the pH is lower than 8.0 or higher than pH 11.0, the reduction of reducibility may cause the dyeing rate of the VAT dye to the fiber to be lowered to the fiber or at the extreme alkali condition due to dye impregnation. Dispersants and leveling agents prevent staining and disproportionation that may occur under alkaline conditions when the VAT dye is dyed to the fibers immersed in the salt solution.

In the present invention, the salt solution is heated at a rate of 1 ~ 1.5 ℃ / min, and immersed and dyed natural cellulose fibers in the salt solution for 45 to 60 minutes at 90 ~ 135 ℃, hi-temperature jigger dyeing It is preferable to heat up at 1-1.5 degree-C / min in RAPID (jet dyeing) at the speed of about 1 degree-C / min. When the fiber is treated in the salt solution for a long time, the polymerization catalyst of the fiber bundle, the process impurities, etc. are reduced to cause discoloration phenomenon. Soaking for 45 to 60 minutes is preferable.

After immersion in the salt solution, the dyeing is completed by cooling to 60-70 ° C and washing with water at a rate of -2.0 to -1.5 ° C / min. The washing process is washed with hot water in the machine for 5 to 30 minutes at 50 ~ 80 ℃. Unfixed dyes or preparations attached to the surface of the fiber can be removed by the washing process, and the remaining preparations must be removed to ensure uniform color due to oxidation under the oxidizing conditions of the post-treatment process, and to reduce the fastness. Can be prevented.

The bat (VAT) dye of the present invention is a reducing dye, so it is necessary to go through the oxidation process again to confirm the natural dyed color. Therefore, the oxidation process, which is a post-treatment of the natural cellulose fiber after the dyeing process is hydrogen peroxide (H ₂ 0 ₂ ) 0.05 ~ 0.1% by weight, glacial acetic acid (CH ₃ COOH) 0.05 ~ 0.1% by weight, benzophenone-based light fastness enhancer or benzo After immersing in a post-treatment solution of 90 ~ 135 ℃ mixed with water with 3 to 10% by weight of triazine-based light fastness enhancer and the balance, it is completed by cooling by slow cooling.

Hydrogen peroxide (H ₂ O ₂ ) of the after-treatment liquid implements a unique color by oxidizing the reducing agent and dye included in the reduction dyeing. The glacial acetic acid (CH ₃ COOH) is an acidic aid to pH correction that can be generated when the alkali added to the reducing conditions for chemical bonding of the fiber immersed in the salt solution and the VAT dye is added to the hydrogen peroxide (H ₂ 0 ₂ ) It is intended to facilitate oxidation.

The benzophenone-based or benzotriazine-based light fastness enhancer actively binds to fibers in an acidic bath and binds to fibers like bonds of dyes, so that UV (ultraviolet) light does not directly contact dyes through diffuse reflection of light. Daylight) to increase the fastness.

On the other hand, it is preferable that the pre-treatment is not performed before the natural cellulose fibers in the salt solution, except the case of the yarn is spun yarn. In the case of the spun yarn, the treatment is performed, and the basic bath CPB (COLD PAD BATCH) with 30 ~ 40 ° C is added to the derivatization solution containing 10 ~ 20.0 g / l enzyme, 0.5 ~ 1.0 g / l surfactant and water as remainder. ), And rinse with water after aging in a aging room at 30 ~ 40 ℃.

Soda ash (Na ₂ CO ₃ ) 5 ~ 10.0 g / l, hydrogen peroxide (H ₂ O ₂ ) 5 ~ 10.0 g / l, hydrogen peroxide stabilizer 3.0 ~ 5.0 g / l, refining agent 5 ~ 10.0 g / l and the remainder as water It is immersed in the refining solution, treated in a basic bath CPB (COLD PAD BATCH) of 40 ~ 50 ℃, aged in a aging room of 30 ~ 40 ℃, washed with water and then pretreated. Afterwards, a process of washing with water at 70-85 ° C. may be added, and the oil component, scavenger, wax and other impurities in the fiber may be removed before entering the dyeing process by the pretreatment process.

According to the present invention, a new dyeing method that can overcome the problems of dyeing natural cellulose fibers, such as Hanji fiber or bamboo fiber, with existing reactive dyes, can be mass-produced without the need for additional strength of the fiber, and without the need for additional production equipment. It can provide a new dyeing method that can be widely used in industrial applications such as interior materials such as sofas or curtains, as well as automotive interiors by improving the light fastness (daylight) fastness.

Figure 1 is a photograph of the HEADLINER standard test report of the automotive interior (No. 2) GRAY COLOR stained Hanji fiber using a bat (VAT) dye of an embodiment of the present invention.
Figure 2 is a photograph of the SEAT standard test report of the vehicle interior (No. 2) GRAY COLOR dyeing Hanji fiber using a bat (VAT) dye of an embodiment of the present invention.

The following examples are given as non-limiting examples of the high light fastness dyeing method of the natural cellulose fibers of the present invention.

Example 1

1. Pretreatment Process

A fabric woven with a gelatinous weave (from Seol Corp.) in a derivatization solution containing 20.0 g / l of enzyme-based enzyme (BI0-1200), 0.5 g / l of surfactant and remainder as water was used as a basic bath CPB (40 ° C). COLD PAD BATCH) and then aged in the AGEING ROOM at 40 ℃ for 16 hours and washed with water. Then, 10.0 g / l of soda ash (Na ₂ CO ₃ ), 10.0 g / l of hydrogen peroxide (H ₂ O ₂ ), 3.0 g / l of hydrogen peroxide stabilizer, 10.0 g / l of refining agent and remainder were immersed in a refining liquid containing water. After treatment in a basic bath CPB (COLD PAD BATCH) of ℃ ℃ aged in 40 ℃ aging room (AGEING ROOM) for 16 hours and washed with water at 85 ℃ to complete the pretreatment.

2. Dyeing Process

SL-DS as a leveling agent 0.5 g / l, DISPER MD 1.0g / l as a dispersing agent, 5.0% by weight of Kedanthrene GRAY M (% by weight) of VAT dye, hydrosulfite (Na ₂ S ₂ O ₄ ) 5.0 g / ℓ , 5.0 g / l caustic soda (NaOH) and the remainder of the mixed salt solution were heated in a RAPID dyeing machine at a rate of 1 ° C./min to soak the fabric at 90 ° C. for 1 hour, and then -1.5 ° C./min. After cooling at 70 ° C. and washing with water at 70 ° C., the resultant is dyed by warm water at 70 ° C., followed by two baths, 0.05% by weight of H ₂ O ₂ , 0.1% by weight of glacial acetic acid (CH ₃ COOH), and benzoine as a light fastener 10.0% by weight of triazine-based light fastness enhancer (DYSTAR SERA FAST P-PAS NEW) and the post-treatment liquid mixed with water were heated at a rate of 1 ° C./minute in a RAPID dyeing machine and the fabric was heated at 90 ° C. for 1 hour. After immersion, the mixture was cooled at a rate of −1.5 ° C./min, cooled to 70 ° C., and washed with warm water at 70 ° C. to complete dyeing in gray.

The test results of the standard applied to HEADLINER and SEAT of automobile interior materials using the fabric of Example 1 are shown in FIGS. 1 and 2. (No. 2) As a result, the light fastness (daylight) fastness is excellently expressed and the headliner and the seat of the car are excellent. It was found that the dyeing was excellent even on the physical property standard.

Claims (3)

Hydrosulfite (Na ₂ S ₂ O ₄ ) 1-20 g / l or Thiourea Dioxide 5-20 g / l, Leveling agent 0.1-2.0 g / l, Dispersant 0.1-2.0 g / l, VAT dye 1- 200 g / l, 1 to 20 g / l of soda ash (Na ₂ CO ₃ ) or caustic soda (NaOH) and the remainder of the salt solution mixed with water at a rate of 1 to 1.5 ° C./minute After immersing the natural cellulose fibers in the salt solution for ˜ 60 minutes, cooled to 60-70 ℃ at a rate of -2.0 ~ -1.5 ℃ / min, washed with water and finished dyeing, hydrogen peroxide (H ₂ 0 ₂ ) 0.05 ~ 0.1% by weight, glacial acetic acid (CH ₃ COOH) 0.05 ~ 0.1% by weight, benzophenone-based light fastness enhancer or 3-10% by weight of benzotriazine-based light fastness enhancer and 90 to 135 ℃ after-treatment mixed with water A high light fastness dyeing method of a natural cellulose fiber, which is immersed in, followed by slow cooling.
The method of claim 1, wherein the natural cellulose-based fiber is a high light fastness dyeing method of natural cellulose-based fiber, characterized in that the Hanji fiber or bamboo fiber.
The method according to claim 1, wherein before the dyeing of the natural cellulose fibers, the natural cellulose fibers are immersed in a derivatizing solution containing 10 to 20.0 g / l enzyme surfactant, 0.5 to 1.0 g / l surfactant and the balance as water. After treatment in 30 ~ 40 ℃ basic bath CPB (COLD PAD BATCH), and after aging in 30 ~ 40 ℃ aging room, washing with water, 5 ~ 10.0 g / L of Soda ash (Na ₂ CO ₃ ), hydrogen peroxide (H ₂ O ₂ ) 5 ~ 10.0 g / ℓ, hydrogen peroxide stabilizer 3.0 ~ 5.0 g / ℓ, refiner 5 ~ 10.0 g / ℓ and remainder immersed in the refining solution containing water in basic bath CPB (COLD PAD BATCH) at 40 ~ 50 ℃ A high light fastness dyeing method of natural cellulose fibers, characterized in that for performing a pre-treatment step of washing after aging in a aging room of 30 ~ 40 ℃ after treatment.

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