KR20180136670A - A method of dyeing high tenacity polyester fabrics with excellent light fastness and thereby dyed high strength polyester fabrics - Google Patents

Abstract

The present invention relates to a method for dyeing a high strength polyester thick fineness yarn fabric, comprising: a refining step which immerses a fabric woven by a high polyester thick fineness yarn with 1,000 denier or more into an aqueous solution adding a surfactant and sodium hydroxide (NaOH) to remove impurities from the fabric; a discharging step which plasma-treats the polyester fabric at oxygen atmosphere under atmosphere pressure to modify a surface of the fabric; and a dyeing step which immerses the polyester fabric in a dye to dye the fabric with a predetermined color. Accordingly, the present invention passes through the refining step for minimizing impurities of a fabric woven by high strength polyester thick fineness yarn fabric, and modifies a surface of the fabric to have an affinity with dyes, and accordingly, have an excellent light fastness.

Description

[0001] The present invention relates to a method of dyeing high tenacity polyester taconic filaments having excellent light fastness, and to a dyeing method of dyeing high tenacity polyester fabrics with excellent light fastness and dyed high strength polyester fabrics,

The present invention relates to a method of dyeing fabrics, and more particularly to a method and fabric for modifying fabrics woven with high denier polyester fasteners having nylon-like properties and having excellent light fastness.

Polyester fabrics are used extensively in synthetic fibers such as nylon, as well as natural fibers such as cotton, which have excellent durability, tensile strength and texture, and good compatibility with other fibers. Taesundo polyester is widely used according to the demand of the industrial material which requires the desired fashion trend and the durable property.

However, due to relatively low physical characteristics compared to conventional nylon, the company is aware of the fact that it is a low-priced product. In addition, there is an oversupply due to a relatively simple manufacturing process. In addition, sales are plummeting due to a drop in oil prices. In addition, due to the recent global economic downturn and oversupply of fabrics for apparel, it is hard to compete with the existing product lineups.

However, among the high denier (over 500d) fabrics, the nylon fabric is mainly supplied by Cordura series products of Invista, and the delivery is relative due to the buyer's own demand such as Hang- However, due to high unit prices, raw materials have been moving to high-strength polyesters, which can replace some nylons recently.

In recent years, researches have been actively conducted to replace nylon with fabric for clothing and other high-strength industrial polyester fabrics in domestic market, and leisure products and military products And polyester yarn with nylon-like properties.

Therefore, although research and development have been actively conducted to cope with this problem, high denier industrial polyester is not easy to exhibit a light fastness of 4 or more. That is, the crystallization region inside the yarn is larger than the garment yarn and the ratio of the amorphous region is low due to the high stretching, so that the dyeing with the disperse dye is harder than the yarn for general garment.

In addition, in case of dyes applicable to conventional polyester yarns, the color is generally darker than that of nylon dyes, and in order to improve the fastness of light in the existing working conditions, application of various dyes and preparation is very difficult Professional manpower input is also difficult with our own manpower alone.

Therefore, in order to satisfy the demand characteristics of the high-tenacity polyester woven fabric and to preoccupy the new market, it is urgently necessary to dye the fabric with a light fastness of 4 to 5 or more.

Korean Patent Registration No. 10-1221413 (entitled "Two-Tone Expression Dyeing Method of Polyester Fabric in Tanshang Temple and Dyed Tangshan Polyester Fabric") Korean Patent Publication No. 10-1412098 (entitled "Method for dyeing high tenacity polyester stretch fabric and dyed high tenacity polyester stretch fabric)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a method for fabricating a high denier polyester yarn, So as to have an overall excellent light fastness of light, and to provide a dyed fabric by this method.

In order to achieve this object, the present invention provides a method for dyeing high tenacity polyester taconic filaments comprising: applying a fabric woven with a high tenacity polyester staple fiber of 1000 denier or higher to 76-92 wt% hot water at 50 < ) And 3 to 12% by weight of an anionic surfactant and 5 to 12% by weight of an anionic surfactant to remove impurities; treating the polyester fabric in an oxygen atmosphere at atmospheric pressure at 100 to 300 W for 5 to 10 minutes and then stained with a discharge step of forming recesses and protrusions at the surface of the fabric, and the polyester fabric was immersed in a weight ratio of 1:50 to the dye dispersant is added in a concentration of 3% pigment and 1g per liter, hypochlorous sodium sulfate (Na ₂ S ₂ O ₄ ) and sodium hydroxide (NaOH) so as to remove the remaining dye.

The refining step according to the present invention is characterized in that the polyester fabric is immersed in an aqueous solution at 40 to 95 캜 for 10 to 50 minutes to remove impurities.

Characterized by high tenacity polyester woven fabrics with excellent light fastness, produced by the process according to the invention.

It should be understood, however, that the terminology or words of the present specification and claims should not be construed in an ordinary sense or in a dictionary, and that the inventors shall not be limited to the concept of a term It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

INDUSTRIAL APPLICABILITY As described in the above construction and operation, the present invention is capable of uniformly refining a fabric woven with a high denier polyester fastening yarn from a low density to a high density to prevent imbalance of refining according to abrupt concentration change, The fabric is plasma-discharged to form roughness so that the surface is coarse, thereby improving the affinity with the dye and providing an overall excellent light fastness.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart briefly illustrating a dyeing method according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method for dyeing fabrics, comprising a dyeing step of sequentially passing a scouring step (S10), a discharging step (S20) and a dyeing step (S30) as shown in FIG. 1, to be. The high tenacity polyester woven fabric of the present invention refers to a woven fabric that is woven with a yarn having a cutting load of 7.0 g / d, 1000 denier or more.

First, the refining step (S10) according to the present invention is a process of dipping a high tenacity polyester woven fabric into a refining solution to remove impurities contained in the fabric. The refining solution is a water solution containing 76 to 92% by weight of warm water at 50 DEG C, 3 to 12% by weight of sodium hydroxide (NaOH) and 5 to 12% by weight of anionic surfactant, For 50 minutes to remove impurities.

In order to prevent irregularity of refining due to a sudden change in concentration, refining the impurities from a low-concentration aqueous solution into a high-concentration aqueous solution and refining them is preferable. On the other hand, examples of the anionic surfactant include sulfonic acid alkyl sulfonates, alkylbenzenes and alkyl dodecyl sulfonic acid salts.

The discharging step S20 according to the present invention is a process of modifying the surface of the refined polyester fabric using an atmospheric pressure plasma apparatus. Here, the plasma apparatus is a type of dielectric barrier discharge, which can treat the surface of the fabric in-line instead of the conventional batch type. Such a plasma apparatus can be applied to large fabrics by widening the gap between the electrodes to 20 to 30 cm.

That is, when the chamber of the plasma apparatus is filled with oxygen of 99% or more and a high voltage of 10 to 30 kHz is applied to the processing surface, a plasma is formed in the chamber, and when the polyester fabric is passed through the chamber, concavities and convexities are formed on the surface of the yarn . The fabric having the irregularities can improve the dyeability by improving the affinity with the dye.

It is preferable that the output of the plasma apparatus is set to 100 to 300 W and the processing time is set to 5 to 10 minutes. When the treatment is carried out at 100 W for 5 minutes or less, the degree of irregularities on the surface is insufficient. When the treatment is carried out at 300 W for 10 minutes or more, the treatment is preferably carried out at 200 W for 10 minutes as the fabric is damaged by sputtering .

Finally, the dyeing step (S30) according to the present invention is a process of dying a surface-modified polyester fabric with a predetermined color by dipping in a dye. That is, the polyester fabric is dyed in a ratio of 1: 50 by weight to a dye containing 3% of a pigment and 1 g of a dispersant per liter. After the dyeing is completed, it is recommended to wash the remaining dye with a detergent mixed with sodium hyposulfate (Na ₂ S ₂ O ₄ ) and sodium hydroxide (NaOH).

Hereinafter, the effects of the dyeing method of the present invention will be examined through the following experiments.

<< First Experiment >>

와 Ethylene glycol

로 측정 속도는 2 mm/min으로 설정하였음. 마지막으로 플라즈마 처리에 따른 폴리에스터 직물의 물성 변화를 알아보기 위해 인장강도 시험을 실시하였으며, 측정 속도는 250 mm/min으로 설정하였음.In order to observe the changes in the physical form and composition of the fabric surface before and after the atmospheric plasma treatment in the oxygen atmosphere, the first experiment was performed using a field emission scanning electron microscope (FE-SEM, Hitachi, S-4800) and Fourier Transform Infrared Spectroscopy / Attenuated Total Reflectance FT-IR / ATR, Perkin Elmer, Spectrum GX). To investigate the surface activity, we measured the dynamic contact angle using elemental analysis using X-ray photoelectron spectroscopy (XPS, ULVAC-PHI, Quantera SXM) and dynamic contact angle analyzer (DCA, KRUSS, K100 Mk1). The measured contact angle was used to determine the surface tension, and the solvent used in the measurement of the dynamic contact angle was distilled water

And Ethylene glycol

The measurement speed was set at 2 mm / min. Finally, tensile strength test was carried out to determine the change of physical properties of polyester fabric by plasma treatment, and the measurement speed was set at 250 mm / min.

<Sample Preparation>

After adding 6 Kg of scouring agent (HD-OPB, ICEI allotment) and 5 Kg of NaOH in warm water at 50 ° C., the prepared polyester fabric was added, and then the temperature was raised from 50 ° C. to 70 ° C. for 20 minutes and then maintained at 70 ° C. for 10 minutes Firstly refined by drainage treatment. 9 Kg of scouring agent (HD-OPB, ICEI alluvium) and 7 Kg of NaOH were added at 70 ° C., and then the temperature was increased from 70 ° C. to 95 ° C. for 20 minutes, maintained at 95 ° C. for 20 minutes, .

<Experimental Conditions>

The surface of the refined polyester fabric was modified using a plasma apparatus of the following specifications. The plasma apparatus was a glow-discharge etching system equipped with a 3.56 MHz RF-generator (Max Power: 650 W). Under the oxygen atmosphere, the processing power was set to 100 W, 200 W and 300 W, and the treatment time was 5 minutes and 10 minutes. The distance between the upper electrode and the lower electrode is 50 mm, and the oxygen gas used is an ultra-high purity industrial gas having a purity of 99.99% or more.

<FT-IR / ATR analysis result>

As a result of the analysis, it was found that the main peak at 3000 cm -1 or more and the main peak at 1800 cm -1 or less were not changed even though the plasma treatment time and the processing power were increased. This shows that there is no change in the physical properties of the fabric due to the composition change since the plasma treatment does not affect the fabric binding.

&Lt; FE-SEM observation result >

Plasma treatment time 5 min Untreated 100W

200W 300W

Plasma treatment time 10 min Untreated 100W

200W 300W

As a result of the observation, it was found that there was no change in the shape of the fabric and no change in the surface state when treated with 100W and 200W. However, when plasma treatment is performed at 300W, the shape of the fabric is rough, and the surface has irregularities called micro-pits or micro-craters.

<AFM analysis result>

Plasma treatment time 10 min




100W

200W

300W

As a result of the analysis, it is seen that when the plasma treatment is performed for 10 minutes, the shape of the fabric changes from 100 W, and the surface is rough and uneven. It can be seen that this irregularity becomes larger as the plasma processing power is increased. In case of 300W, the shape of the fabric is rough and the cracked portion can be seen. This phenomenon shows that the plasma under the oxygen atmosphere acts on the surface of the fabric to make irregularities on the surface of the fabric, and the greater the processing power, the larger and more irregularities are produced.

In addition, at 200W and 5 minutes of atmospheric pressure plasma treatment conditions, the surface irregularities are not large. However, in the case of 100W and 10 minutes, the irregularities on the surface are visually observed. This means that even if the plasma processing power is increased, the fabric surface can not be roughened if the time is not sufficient and the processing time is required to be higher for processing power reduction.

<XPS analysis>

Samples
Chemical composition [at.%] Atomic ratio C O N O / C N / C Untreated 85.63 11.43 1.20 0.13 0.01 100W 77.42 17.00 2.15 0.22 0.03 200W 73.28 19.49 2.92 0.27 0.04 300W 73.22 16.5 2.98 0.23 0.04

As a result of analysis, the composition ratio of C decreased with increasing the processing power, whereas the composition ratio of O increased with increasing the processing power. This can be regarded as an increase in the degree of activation of the oxygen on the fabric surface. The C-O bond thus activated may be bonded to other coating liquids or emulsions and thus may have a higher adhesive strength.

However, in the case of 300W, the proportion of C decreased slightly compared to 200W, but the proportion of O decreased. This indicates that the activator does not increase unconditionally as the intensity of the plasma treatment increases, and that it can have the highest binding energy under proper conditions.

&Lt; Contact angle measurement &

Distilled water

Ethylene glycol

As a result, distilled water and ethylene glycol solvent showed similar tendency. As the processing power increases from untreated polyester fabrics, the contact angle decreases, indicating that the activator on the surface of the fabric increases and the hydrophilic properties are getting stronger.

However, the decreasing contact angle also increases from 200W to 300W. This is considered to be due to the fact that the plasma treatment power is increased but the oxygen bond on the surface of the fabric is no longer increased. Comparing the contact angle according to the plasma treatment time, it can be seen that the treatment for 10 minutes than the fabric treated for 5 minutes has a lower contact angle.

Samples
Contact angle (??) Surface free energy (mJ / m2)
Water Ethylene glycol Untreated 59.12 71.33 42.52 100W 50.87 56.46 43.72 200W 48.16 51.07 48.54 300W 51.22 56.95 49.34

Surface tension increases with increasing processing power and processing time. Compared with the processing power and processing time, the processing power was 48 mJ / m2 at 200W, and the surface tension at 493.4mJ / m2 at 300W was stronger than the treated fabric.

&Lt; Measurement of tensile strength &

Samples Tensile strength (N) Strength retention (%) Untreated 5010.1 - 100 W, 5 min 5465.2 109.1 100 W, 10 min 5197.8 103.7 200 W, 5 min 4987.2 99.5 200 W, 10 min 5285.4 105.5 300 W, 5 min 4468.5 89.2 200 W, 10 min 4497.3 89.8

The results show that the fabric treated at 300W has lower tensile strength than the other conditions, which indicates that the cracks due to the excessive plasma treatment affected the change in physical properties. Therefore, as the plasma processing power and processing time increase, affinity increases, but the physical properties of the fabric are lowered during over treatment, so proper conditions are required for the plasma treatment.

<< Second Experiment >>

We will try to confirm the dyeability of the high strength polyester fabric by plasma treatment by basic dyeing test of polyester fabric after plasma treatment. The color intensity according to the plasma treatment was calculated by the computer color matching system SF-600 (Data color) and the K / S value at the intrinsic wavelength according to Kubelka-Munk equation. The dyes used are four colors of red, violet, blue, and black. Dyeing temperature Dyeing at 130 ℃ ~ 140 ℃ for 40 minutes and measured after soaping process.

<Experimental Conditions>

The prepared polyester fabric was treated with 200W, 10min plasma treatment, 300W and 5min plasma treatment, and 2g of each sample was prepared. Dianix dispersion dye of D company, which is a foreign dye maker, was applied. The dye concentration was fixed at 3% o.w.f. Sodium hydrosulfite (2 g / L, NaOH 1 g / L, 80 ℃, 10 min) was used as a dispersing agent, and Sunsolt RM 340 of Nika Korea was applied at a concentration of 1 g / Removal of residual dye on fabric surface through process.

<Color intensity comparison of dyeing>

4 Dye Lab. As a result of the dyeing experiment on the scale, the color intensity was slightly increased by the plasma treatment. This is considered to be the result of the roughness and the activity of the fabric surface by the plasma treatment as in the first experiment.

<Comparison of total K / S value of dyeing materials>

Samples Untreated Plasma
(200 W, 10 min) Plasma
(300 W, 5 min) Black 214.1 226.5 218.3 Red 223.0 282.9 278.4 Violet 122.6 131.0 133.5 Blue 133.6 148.5 147.8

Comparing the total K / S value of 4 kinds of dyes using plasma treated fabrics, the color intensity of 200W, 10min plasma treatment was higher than that of 300W, 5min treatment condition. Therefore, it is judged that it is more efficient to take the plasma treatment condition as long as possible.

As described above, in the case of the high-tenacity polyester fabric of 1000 denier or more, since the penetration amount of the dye is not enough due to the high crystallinity of the yarn and the decrease of the specific surface area compared to the three denier multifilament, the basic whiteness is weak and it is difficult to maintain the fastness. By setting the optimum plasma treatment for 10 minutes at the output, it is possible to improve the color saturation of the dyed material by giving the active surface to the surface of the fabric while generating the micro-roughness on the surface while maintaining the tensile strength.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

S10: refining step
S20: Discharge step
S30: Dyeing step

Claims (3)

CLAIMS 1. A method for dyeing high tenacity polyester taconic filaments comprising:
A fabric woven with a high tenacity polyester staple fiber of 1000 denier or more is immersed in an aqueous solution containing 76 to 92% by weight of hot water at 50 캜 in an amount of 3 to 12% by weight of sodium hydroxide (NaOH) and 5 to 12% by weight of an anionic surfactant, A scouring step of removing the slurry;
A discharge step of subjecting the polyester fabric to plasma treatment at 100 to 300 W for 5 to 10 minutes in an atmosphere of oxygen at atmospheric pressure to form irregularities on the surface of the fabric; And
The polyester fabric of a 3% and then the concentration of pigment, was immersed in a weight ratio of 1:50 to dye a dye dispersant is added per liter of 1g, hypochlorous sodium sulfate (Na ₂ S ₂ O ₄₎ and sodium hydroxide (NaOH) is mixed And removing the residual dye by washing with a detergent to remove the remaining dye. The dyeing method of high tenacity polyester tassel fabric having excellent light fastness of light. The method according to claim 1,
Wherein the refining step comprises dipping the polyester fabric in an aqueous solution at 40 to 95 캜 for 10 to 50 minutes to remove impurities. A high strength polyester tassel fabric having excellent light fastness, produced by the process according to any one of the preceding claims.

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