KR101294776B1 - Process of processing dyeing for meta-aradmid/flame-resistant rayon mixed textiles - Google Patents

Abstract

PURPOSE: A two-step dyeing method of the meta type aramid/ flame resisting rayon blended fabric is provided to dye the aramid fiber in various colors without degradation phenomenon of the flame resisting rayon material and aramid fiber. CONSTITUTION: A two-step dyeing method of the meta type aramid/flame resisting rayon blended fiber performs the first dyeing progress by dipping the meta type aramid/ flame resisting rayon blended fiber after heating the first dyeing solution which includes 1-6 weight% of carrier compounding of benzyl alcohol or nonionic arylether system, 1.0-4.0 weight% of acetophenone, 0.1-0.5 weight% of acetic acid, 1-30 weight% of cation class dye, 0.1-0.3 weight% of NaNO_3 and water in 120-135°C. The fiber is sanitized with 60°C of aqueous solution that contains 0.05-0.5 weight% of sodium carbonate and 0.05-0.5 weight% of Na_2CO_3 after being cooled in 60-70°C. The second dyeing solution which contains 0.1-20 weight% of reactive dye heated from 40-60°C after adding 0.5-10 weight% of sulphate of soda. 0.5-7 weight% of Sodium carbonate (Na_2CO_3) is added at 60-80°C for 20-60 minutes with dipping meta type aramid/flame resisting rayon blended fiber to process the second dyeing progress. It is cooled and sanitized to 40-50°C.

Description

Process of Processing Dyeing For Meta―Aradmid ／ Flame―resistant Rayon Mixed Textiles}

The present invention relates to a two-bath dyeing method of the meta-aramid / flame retardant rayon blend fiber, in particular, so that the two-bath dyeing without the degradation of the strength and elongation of aramid and flame retardant rayon due to the use of a swelling agent used for aramid dyeing The present invention relates to a dyeing method that can be dyed by a method capable of reproducing all colors by using a cationic dye and a reactive dye to escape from the existing primary color reproduction.

Meta-aramid is a fiber that is in the spotlight as a functional composite material such as fire fighting suit, electric wire coating, and rubber reinforcing material due to its excellent chemical resistance and heat resistance. On the other hand, while maintaining the advantages of expensive meta-aramid to produce a flame-retardant rayon blended yarn or blended fabrics can be used in military uniforms or workwear in recent years because it can exhibit flame retardancy while minimizing the cost burden when using.

The cationic dye used for meta-aramid dyeing has a characteristic that the dyeing becomes smooth and the dyeing property is increased at pH 2.5-4.5, which is an acidic bath. On the other hand, rayon fiber is characterized by a decrease in strength and physical properties under strong acidic conditions. As the flame retardant rayon is embrittled in an acidic bath, it is important to dye the blend without changing the fiber properties in the pH stability and high temperature and high pressure dyeing conditions of the meta-aramid / flame retardant blend fiber.

In addition, due to the use of cationic dyes and swelling agents used in dyeing meta-aramid fibers, color of flame retardant rayon fibers as well as dyeing with meta-aramid fibers during one bath dyeing of meta-aramid / flame retardant blend fibers. affect. This is not a chemical / physical bond between the normal dye and the fiber, so it is not only a cause of color fastness but also a problem of a decrease in field reproducibility during spot dyeing.

Therefore, according to the present invention, there is no problem of reducing the strength of meta-aramid fibers by overcoming the problems of the conventional welding method, carrier dyeing method, ultra high temperature high pressure dyeing method, supercritical dyeing method, and the strength of flame retardant rayon in swelling agent and strong acidic bath. Its technical task is to provide a two-bath dyeing solution that can secure color fastness and color stability without deterioration, and to provide a new dyeing method for mass production without the need for additional production equipment.

MEANS TO SOLVE THE PROBLEM In order to solve the said technical problem, the meta-aramid fiber is dyed in various colors, without deterioration of a physical property, using the salt method of a cationic dye, the nonionic aryl ether carrier preparation, or the benzyl alcohol carrier preparation, and an acetophenone additive. The present invention has been completed by recognizing that flame retardant rayon can be dyed using additives such as reactive dyes, forget-me-not and alkali.

Therefore, according to the present invention, benzyl alcohol or nonionic aryl ether carrier preparation 1 to 6% by weight, acetophenone 1.0 to 4.0% by weight, glacial acetic acid 0.1 to 0.5% by weight, cationic dyes 1 to 30% by weight, NaNO ₃ 0.1 ~ 0.3% by weight and the balance of the first primary salt solution mixed with water, the meta-aramid / flame retardant rayon blend fibers were immersed in primary dyeing at 120 ~ 135 ℃, and then cooled and cooled to 60 ~ 70 ℃ After washing with a 60 ℃ aqueous solution containing 0.05 ~ 0.5% by weight of sodium hydrosulfite and 0.05 ~ 0.5% by weight of soda ash (Na ₂ CO ₃ ),

The secondary salt solution containing 0.1 to 20% by weight of the reactive dye was heated up and added to contain 0.5 to 10% by weight of forget-me-not at 40 to 60 ° C., and then heated again. Soda ash at 60 to 80 ° C. (Na ₂ CO ₃ ) Is added to 0.5 to 7% by weight, immersed meta-aramid / flame-retardant rayon blend fiber for 20 to 60 minutes at 60 ~ 80 ℃, after the second dyeing, cooled to 40 ~ 50 ℃ and washed with water A two-bath dyeing method of meta-aramid / flame retardant rayon blend fiber is provided.

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

The present invention relates to a method of two-bath dyeing of meta-aramid / flame retarded rayon blend fibers so as to reproduce all colors by using a cationic dye to escape from the existing color reproduction.

The two-bath dyeing method of the meta-aramid / flame retardant rayon blend fiber of the present invention is a meta-aramid / flame retardant rayon blend fiber for the preparation of benzyl alcohol or nonionic aryl ether carrier, acetophenone, glacial acetic acid, cationic dye, NaNO ₃ and As the remainder, the first primary salt solution containing water was heated up, and the primary dyeing was performed by immersing the meta-aramid / flame retarded rayon blend fiber at 120 to 135 ° C, and after cooling, sodium hydrosulfite and soda ash (Na ₂ CO ₃ After washing with aqueous solution containing), it was added to the secondary salt solution containing the reactive dye so as to contain the forget-me-not, and then heated up, and soda ash (Na ₂ CO ₃ ) was added to immerse the meta-aramid / flame retarded blend fiber. Secondary dyeing, then cooled and washed with water.

First, the salt solution of the present invention contains a carrier aid of 1 to 6% by weight of a nonionic arylether carrier aid or 1 to 6% by weight of benzyl alcohol, and contains 1 to 4% by weight of acetophenone and 0.1 to 0.5% by weight of glacial acetic acid. , 1 to 30% by weight of cationic dyes, 0.1 to 0.3% by weight of NaNO ₃ and the balance of water is used as the remainder, containing a carrier preparation (nonionic arylether carrier aid or benzyl alcohol) and acetophenone The dye is easily dyed with meta-aramid fibers. It is preferable to use Lanxess levegal c45 as a nonionic arylether carrier aid.

The glacial acetic acid acidifies the fibers immersed in the salt solution to affect the preparation of cationic dyes, acetophenone, etc., so that the cationic dyes are dyed to the fibers, and the pH is preferably adjusted to 3.5 to 5.0. When the pH is lower than 3.5 or higher than pH 5, the carrier preparations and dyes are deteriorated, so that they are not hydrolyzed and dyed.

NaNO ₃ plays a role of improving the solubility of the dye. It is preferable to dissolve it in the salt solution several times at intervals of 10 minutes or more and stir for 5 minutes. Non-uniform concentrations of NaNO ₃ in the saline solution can cause dyes to precipitate and spots on the fibers.

By using the cationic dye in the present invention, the dye may be absorbed into the aramid fiber under the aid of the acetophenone and the carrier aid which is the nonionic aryl ether carrier carrier or benzyl alcohol, and the dye may be physically held by the aramid fiber. It combines with the counterions (nitrogen or chlorine) present. The cationic dyes may be azo, anthraquinone, cyanine, triphenyl-methane, or oxazine dyes.

The reason for dyeing the meta-aramid fiber portion first in the present invention is as follows. Due to the use of swelling agents used in dyeing meta-aramid fiber parts, it is not dyeing but dyeing for all natural and synthetic fibers dyed together, which not only causes a decrease in color fastness but also reduces field reproducibility when spot dyeing is performed. Since the primary dyeing process of dyeing the meta-aramid fiber portion of the first dyeing and dyeing the flame-retardant rayon fiber portion of the secondary dye under the second bath conditions using a reactive dye.

For example, when dyeing flame-retardant rayon fiber portions firstly with reactive dyes and then meta-aramid fiber portions secondly, meta-aramid fiber portions are dyed at temperatures higher than 60 ℃, which is the dyeing temperature of reactive dyes. As a result, the dyed color of the flame retardant rayon fiber was discolored and the dye was dyed due to the swelling agent and the catch-on dye used to dye the meta-aramid fiber. Not only does the workability of the same color that can be worked with the same color deteriorate, but it can also lead to degradation in the fastness.

In addition, the present invention shows the stability of the fastness due to the conditions of the reduction cleaning after the first dyeing on the meta-aramid fiber portion, if the primary dyeing dyed flame retardant rayon and the second dyeing of the meta-aramid fiber portion 2 It is highly likely that the dye will be discolored by breaking the bonding groups of the reactive dyes dyed in flame retardant rayon as well as the dyes undyed in the meta-aramid fiber part due to the reduction and washing process after the second dyeing.

Therefore, in the present invention, the dyeing of meta-aramid fibers in the primary dyeing using a catch-on dye at a high temperature and high pressure of 120 ~ 135 ℃, cooled to 60 ~ 70 ℃ sodium hydrosulfite 0.05 ~ 0.5% by weight and After washing with 60 ° C aqueous solution containing 0.05 ~ 0.5% by weight of soda ash (Na ₂ CO ₃ ), after washing with reduction, dyeing flame-retardant rayon at 60 ° C using reactive dye as secondary dyeing Color fastness and color stability were secured under the conditions for completing the process.

After the first dyeing, the flame-retardant rayon portion is dyed, the second dyeing solution containing 0.1 to 20% by weight of the reactive dye is heated at a rate of 1 ~ 2.0 ℃ / min 0.5 to 10 at the temperature of 40 ~ 60 ℃ After adding to contain the wt%, the temperature was again increased at a rate of 1 to 2.0 ° C./min, and soda ash (Na ₂ CO ₃ ) was added at 0.5 to 7 wt% at 60 to 80 ° C. to 20 to 20 ° C. at 60 to 80 ° C. After secondary dyeing by immersing meta-aramid / blend fiber for 60 minutes, it cools to 40-50 degreeC at the speed of -1.5-2.0 degreeC / min, and washes with water.

The meta-aramid / flame retardant rayon blend fiber has a weight ratio of meta-aramid and flame retardant rayon of 65:35 to 50:50, which is preferable in terms of price competitiveness of the fiber, which exhibits flame retardant functionality and is economical.

When the meta-aramid / flame retardant rayon blended fiber is a mixed yarn of meta-aramid / flame retardant rayon, it should be treated as it is a mixed yarn. In order to ensure flame retardancy, which is the main reason for using meta-aramid fibers, it can be removed and pretreated.

After treatment at 50 ℃ ~ 70 ℃ in a treatment agent containing 1.0 ~ 3.0% by weight of enzyme caller and 0.1 ~ 0.3% by weight of surfactant in a mating room of 40 ~ 60 ℃ after washing with water after 8-12 hours Before immersing the aramid-based flame retardant blend fiber in the first salt solution, 1 to 4% by weight of soda ash (Na ₂ CO ₃ ), 0.5 to 3% by weight of hydrogen peroxide (H ₂ O ₂ ), 0.1 to 1.0% by weight of hydrogen peroxide stabilizer It is recommended to add a pretreatment step of treating the pretreatment liquid at 40 to 60 ° C., and then rinsing the water at 70 to 85 ° C. after aging for 8 to 12 hours. The pretreatment process can remove oil components, fibers, waxes and other impurities in the fiber prior to entering the dyeing process. In this case, it is important to avoid contact with strong alkalis such as caustic soda because the flame-retardant rayon fiber part is vulnerable to strong alkalis, which may cause strength degradation and embrittlement.

According to the present invention, it is possible to dye aramid fibers in various colors without reducing the strength of the aramid fibers and the flame retardant rayon material, and provide a new dyeing method capable of mass production without the need for additional production equipment. In addition, while maintaining the advantages of the expensive aramid fibers can be flame retardant while minimizing the cost burden when using a flame retardant rayon blended yarn or blend fabrics.

1 is a test report measuring the change in physical properties (tensile strength) after two bath dyeing of meta-aramid / flame-retardant rayon blend fibers of one embodiment of the present invention.
FIG. 2 is a photograph of a test report of the first surface of a blue-dyed fabric of a method of dyeing two-methods of meta-aramid / flame retardant rayon blend fibers according to an embodiment of the present invention. FIG.
3 is a photograph of a test report of the first page of the spun yarn dyed in blue in the dyeing method of meta-aramid / flame retardant rayon mixed spun yarn of an embodiment of the present invention.

In the following examples, non-limiting examples of the two-bath dyeing method of the meta-aramid / flame retardant rayon blend fibers of the present invention.

Example 1

Carrier preparation benzyl alcohol 2% by weight and acetophenone 1.5% by weight, glacial acetic acid 0.2% by weight, Astrazon Golden yellow GL-E 0.25% by weight, Astrazon BLUE FGRL 1.5% by weight, NaNO ₃ 0.15 The salt solution mixed with water by weight and remainder was heated at a rate of 1 ° C./min, and mixed with ARAWIN 50% of Woongjin Chemical and 50% flame retardant rayon of Lenzing for 1 hour at 130 ° C. After immersing the woven fabric with spun blended yarn, it was cooled at -1.5 ° C / min, cooled to 70 ° C, followed by 60% by weight of sodium hydrosulfite and 0.5% by weight of soda ash (Na ₂ CO ₃ ). After the first dyeing by washing in an aqueous solution of ℃, 0.3% by weight of reactive dyes (DERIMRINE YELLOW CL-2R), 0.05% by weight of reactive dyes (DERIMRINE RED CL-5B), 1.15% by weight of reactive dyes (DERIMRINE BLUE HF-RL) The secondary salt solution mixed with water as remainder up to 40 ° C using a speed of 1 ~ 2.0 ° C / min Was added to the temperature was raised containing 3% by weight of the Glauber's salt at 40 ℃ then temperature was raised at a rate of 1 ~ 2.0 ℃ / min back to 60 ℃.

Then, soda ash (Na ₂ CO ₃ ) is added at 60 ° C. to contain 5% by weight, and the meta-aramid / flame retardant rayon blended fabric is immersed at 60 ° C. for 20 to 60 minutes, and then the speed is -1.5 to 2.0 ° C./min. The mixture was cooled to 40 ° C., washed with 60 ° C. aqueous solution, and then dyed blue.

[Example 2]

2% by weight of carrier preparation benzyl alcohol and 1.5% by weight of acetophenone, 0.2% by weight of glacial acetic acid, 20.0% by weight of Astrazon BLACK SW, 0.15% by weight of NaNO ₃ and the balance of the first salt solution with water The temperature was raised at a rate of / min, and the fabric was immersed in a blended spinning yarn mixed with 50% of ARAWIN of Woongjin Chemical and 50% of flame retardant rayon of Lenzing, for 1 hour at 130 ° C, and then -1.5 ° C. After cooling at a rate of / min to 70 ℃ and washed with a 60 ℃ aqueous solution containing 0.5% by weight of sodium hydrosulfite and 0.5% by weight of soda ash (Na ₂ CO ₃ ), after primary dyeing reactive dyes (Oyoung Industry BLACK CNN) 5% by weight of the secondary salt solution mixed with water as a balance up to 40 ℃ using a weight of 1 ~ 2.0 ℃ / min at a rate of 3 to 20% by weight to put the forget-me-not at 60 ℃ again The temperature is raised at a rate of 1 to 2.0 deg. C / min. Then, soda ash (Na ₂ CO ₃ ) is added at 60 ° C. to 5% by weight, and the meta-aramid / flame retardant rayon mixed fabric is immersed at 60 ° C. for 20 to 60 minutes, and then 40 at a rate of -1.5 to 2.0 ° C./min. After cooling to ℃ and washed with an aqueous solution of 60 ℃ to complete the dyeing black.

Washing fastness, sublimation fastness and friction fastness of the fabric dyed by the above Examples are shown in Table 1 below.

division Dye Concentration ^One) Light fastness ²⁾ Wash fastness ³⁾ Friction fastness (dry / wet) ⁴⁾

Example 1

Astrazon Golden yellow GL-E (0.25)




2-3








4








4



Astrazon BLUE FGRL (1.5) DERIMRINE YELLOW CL-2R (0.3) DERIMRINE RED CL-5B (0.05) DERIMRINE BLUE HF-RL (1.15)
Example 2 Astrazon BLACK SW (20.0)
3-4
4
3-4
Oyoung Industry BLACK CNN (5.0)

1) Dye solid content 100% 2) ISO 105 BO2: 2000 method

3) ISO 105 C06: 1994 method 4) ISO 105 X 12: 2001 method

As shown in Table 1, the light fastness, washing fastness and friction fastness of each embodiment are excellently expressed, and it can be seen that the dyeing is excellent for various colors.

Claims (3)

Benzyl alcohol or nonionic aryl ether carrier preparation 1 to 6% by weight, acetophenone 1.0 to 4.0% by weight, glacial acetic acid 0.1 to 0.5% by weight, cationic dyes 1 to 30% by weight, NaNO ₃ 0.1 to 0.3% by weight and the balance As a result, the primary salt solution mixed with water was heated to immerse the meta-aramid / flame retarded rayon blend fiber at 120 to 135 ° C. for primary dyeing, and then cooled to 60 to 70 ° C., followed by sodium hydrosulfite 0.05 After washing in an aqueous solution of 60 ℃ containing ~ 0.5% by weight and 0.05 ~ 0.5% by weight of soda ash (Na ₂ CO ₃ ),
The secondary salt solution containing 0.1 to 20% by weight of the reactive dye was heated up, and then the forget-meat was added at 40 to 60 ° C to contain 0.5 to 10% by weight. Meta-based aramid / flame retarded rayon blend fiber for 20 to 60 minutes at 60-80 ° C. and secondary dyeing, followed by cooling to 40-50 ° C. and washing with water. 2 bath dyeing method of aramid / flame retardant rayon blend fiber. The treatment agent according to claim 1, wherein the meta-aramid / flame retardant rayon blend fiber is a meta-aramid / flame retardant rayon blended yarn. After treatment at 50 ℃ ~ 70 ℃, aging after 8 ~ 12 hours in AGEING ROOM of 40 ℃ ~ 60 ℃, washing with water and before soaking the meta-aramid / flame retardant blend fiber in the first saline solution (Na2CO3) ) 1 ~ 4% by weight, hydrogen peroxide (H2O2) 0.5 ~ 3% by weight, and hydrogen peroxide stabilizer containing 0.1 ~ 1.0% by weight of pre-treatment solution at 40 ~ 60 ° C, then aged in aging room for 8 ~ 12 hours and then at 70 ~ 85 ° C A two-bath dyeing method of meta-aramid / flame retardant rayon blend fiber, further comprising a pretreatment step of washing with water. The method of claim 1, wherein the meta-aramid / flame retardant rayon blend fiber has a weight ratio of meta-aramid and flame retardant rayon in a range of 65:35 to 50:50. .

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