KR100885551B1 - Method for dyeing nanofiber cloth - Google Patents

Abstract

A dyeing method of nano-fiber cloth using far infrared rays dyeing machine is capable of dyeing not only functional nano-fiber cloth but also micro fiber. A dyeing method of nano-fiber cloth(1) comprises next steps. Salt solution including coloring agent and binder is manufactured. The salt brine is absorbed in the nano-fiber cloth. And by using far infrared rays dyeing machine, the nano-fiber cloth in which the salt brine is absorbed is dried. The salt brine includes more additives.

Description

Method for dyeing nanofiber cloth

The present invention relates to a dyeing method of a nanofiber fabric, and more particularly, to a dyeing method of a nanofiber fabric capable of imparting functionality as well as dyeing of ultrafine nanofibers which cannot be achieved by conventional dyeing using a far-infrared dyeing machine. It is about.

Nanofibers are as smooth as skin, thinner and lighter than paper, breathing sweat, but not accepting any foreign substances such as bacteria, and the world is blowing the fever of developing nanofibers. This is because these nanofibers lead to dream fibers as ultra-fine yarns with diameters of only a few to several hundred nanometers (1 nanometer (nm) = 1 billionth of a meter). For reference, human hair is about 80,000 nm, and a piece of paper is about 100,000 nm thick.

These nanofibers with diameters of several hundreds of nm have a large surface area per unit volume that cannot be compared with conventional microfibers, and can manufacture nanofibers with various surface properties, structures, and composite components, thus overcoming the limitations of conventional microfiber applications. And the creation of new functional products.

The nanofiber web using the manufacturing technology of such nanofibers is known to be developed as an ultra high precision filter medium for environmental industry, electric and electronic industry material, medical biomaterial, and high performance composite material.

In the future, in order to create a variety of nanofibers, such as commercialization of the finished product, it is most important to maintain the intrinsic advantages of the fiber, in particular, it is required to have a good color fastness.

Meanwhile, in the case of thin fabrics, screen printing, and in the case of medium / rear fabrics, Laura and rotary printing methods are widely used, and the printing methods are limited to general fabrics / knitted fabrics, and also to general microfibers (2.1 μm in diameter). However, nanofibers having more fineness have a disadvantage in that the dyeing itself is difficult.

Therefore, there is still a need for a separate dyeing process for effective dyeing of nanofibers.

Accordingly, the technical problem to be achieved by the present invention is to provide a dyeing method of a nanofiber fabric capable of imparting functionality as well as dyeing of ultrafine nanofibers, which cannot be achieved by a conventional dyeing method, using a far-infrared dyeing machine.

The present invention to achieve the above technical problem,

Preparing a salt solution containing a colorant and a binder;

Adsorbing the salt solution on a nanofiber fabric; And

It provides a method for dyeing a nanofiber fabric comprising the step of drying the nanofiber fabric adsorbed by the salt solution using a far infrared dyeing machine.

According to one embodiment of the present invention, the salt solution may further include an additive.

According to another embodiment of the present invention, the step of adsorbing the salt solution to the nanofiber fabric is the step of immersing the nanofiber fabric in the treatment tank containing the salt solution; And it may comprise the step of pressing the nanofiber fabric immersed in the saline solution.

According to another embodiment of the present invention, the step of adsorbing the salt solution to the nanofiber fabric may include applying the salt solution to the nanofiber fabric.

According to another embodiment of the present invention, the step of adsorbing the saline solution to the nanofiber fabric is the step of immersing the nanofiber fabric in the treatment tank containing the salt solution, and pressing the nanofiber fabric immersed in the salt solution; And applying the salt solution to the nanofiber fabric at the same time.

According to another embodiment of the present invention, the step of pre-drying the nanofiber fabric between the step of adsorbing the saline solution to the nanofiber fabric and the step of drying the nanofiber fabric adsorbed by the salt solution using a far infrared dyeing machine It may include.

According to another embodiment of the present invention, the drying step may be performed for 1.5 to 3.5 minutes at a temperature of 80 to 300 ℃.

According to another embodiment of the present invention, the wavelength of the far infrared ray may be 6 μm to 11 μm.

According to another embodiment of the present invention, the nanofiber fabric may include a substrate and a nanofiber web formed on the substrate.

According to another embodiment of the present invention, the nanofiber web may be prepared by spinning the polymer solution by flash spinning, static spinning, melt blow spinning, electro blow spinning, or electroflash hybrid spinning.

According to another embodiment of the present invention, the polymer is polyimide, polyamide, polyaramid, polybenzimidazole, polyetherimide, polyacrylonitrile, polyethylene, polypropylene, polyaniline, polyethylene oxide, polyethylene naphthalate, poly At least one selected from the group consisting of butylene terephthalate, styrene-butadiene-rubber (SBR), polystyrene, polyvinyl chloride, polyvinyl alcohol, polyvinylidene fluoride, polyvinylbutylene, polyethylene terephthalate, and polysulfone have.

According to the present invention, by using a far-infrared dyeing machine, it is possible to provide a dyeing method of a nanofiber fabric capable of imparting functionality as well as dyeing nanofibers that are not microfibers by conventional dyeing methods.

Hereinafter, the dyeing method of the nanofiber fabric according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention comprises the steps of preparing a salt solution containing a colorant and a binder; Adsorbing the salt solution on a nanofiber fabric; And it relates to a dyeing method of the nanofiber fabric comprising the step of dyeing the nanofiber fabric adsorbed the salt solution using a far infrared dyeing machine.

1 is a schematic diagram of a far-infrared dyeing machine used in the dyeing method of the nanofiber fabric according to an embodiment of the present invention.

The dye solution containing the colorant is adsorbed by the colorant applying roller 3 through the feed roller 2, and the nanofiber fabric 1, which is the dye, is adsorbed, using a colorant applying roller 3 'having a different color or the like. Color may be applied to the nanofiber fabric. After passing through the preliminary drying roller (4) equipped with a heater, the water in the salt solution is removed, and the nanofiber fabric (1) in which the salt solution is adsorbed through the transfer rollers (5, 7) and the transfer belt (6) is a far-infrared dyeing machine. It is dyed while passing (part partitioned with a dotted line), and is wound up by the winding roller 14.

First, looking at the manufacturing step of the salt solution is as follows.

A colorant according to an embodiment of the present invention is a material having a unique color by selectively absorbing visible light, and generally has a property of stability to withstand sunlight, washing, friction, sweat, etc. by coloring with a fiber by a suitable dyeing method, that is, It refers to an organic aromatic compound having a fastness, and can be classified into a dye having solubility in a double salt bath and a pigment having insolubility in a salt bath and used with a fixing agent.

The dye may be used by selecting any one of acid dyes, reactive dyes, disperse dyes, azo dyes, bat dyes and natural dyes or a mixture of two or more, but is not particularly limited thereto, and is suitable for each fiber material Dyes can be used.

In addition, conventional pigments and organic pigments may be used as the pigment.

Specific examples of the inorganic pigments include white pigments such as titanium dioxide, zinc oxide, barium sulfate, and silicon dioxide; Green pigments such as chrome green; Blue pigments such as cobalt blue, ultramarine blue, and Prussian blue, and brown pigments such as giena brown; Black pigments such as carbon black and iron black.

In addition, as organic pigments, organic pigments such as orange, green, etc. in addition to magenta, cyan, yellow, and black, which are basic colors of ink, are used. For example, magenta is C.I. Pigment Red 122, C.I. Pigment Red 57: 1, C.I. Pigment Red 185, C.I. Pigment Red 176, C.I. Pigment Red 48: 3, C.I. Pigment Red 247, C.I. Pigment Red 170, C.I. Pigment Red 53: 1, C.I. Pigment Red 149, C.I. Pigment Violet 19, C.I. Pigment Red242, C.I. Pigment Red 37 is selected and used, yellow is C.I. Pigment Yellow 181, C.I. Pigment Yellow 191, C.I. Pigment Yellow 83, C.I. Pigment Yellow 180, C.I. Pigment Yellow 13, C.I. Pigment Yellow 120, C.I. Pigment Yellow 194, C.I. Pigment Yellow 151, C.I. Pigment Yellow 139, C.I. Pigment Yellow 17, C.I. Pigment Yellow 155 is selected and used, cyan is C.I. Pigment Blue 15: 1, C.I. Pigment Blue 15: 3 is used. Black is carbon black C.I. Balck 7, Carbon black C.I. Selected from Balck 11, orange is C.I. Pigment Orange 13, C.I. Pigment Orange 34, C.I. Pigment Orange 38, C.I. Pigment Orange 72, C.I. Pigment Orange 43, C.I. Pigment Orange 68, C.I. Pigment Orange 74, C.I. Pigment Orange 5 is selected and used, and green color is C.I. Pigment Green 7, C.I. Pigment Green 36, C.I. Selected from Pigment Green 17.

At this time, in order to raise the coloring degree of a nanofiber cloth, an organic pigment is preferable as a coloring agent.

The content of the colorant in the dye bath is 0.5 to 3.5% by weight of the fiber, preferably 1 to 3% by weight, based on the weight of the nanofiber fabric to be dyed.

When the content of the colorant is less than 0.5% by weight o.w.f, the light fastness and washing fastness are lowered, and when the content of the colorant is greater than 3.5% by weight o.w.f, the frictional fastness and touch feeling are lowered, which is not preferable.

As the binder, polyurethane, silicone, melamine resin, urea resin, glyoxal resin, hydrogen carbonate resin, polyester imide, polyacrylic acid ester, polyolefin, or polyamide may be used.

Among these, the polyurethane-based binder may be preferably used in consideration of the feel of the fiber, and the silicone-based binder may be preferably used in consideration of the elasticity and aesthetics of the fiber.

The content of the binder in the salt bath is 3 to 10% o.w.f, preferably 4 to 7% o.w.f relative to the weight of the nanofiber fabric to be dyed.

When the content of the binder is less than 3% by weight o.w.f, washing and frictional fastness are lowered, and when the content of the binder is 10% by weight o.w.f or more, the touch is poor, which is not preferable.

And in order to give the functionality of the nanofiber fabric, an additive may be further included in the salt solution. The additives include water repellents, thickeners and the like.

Examples of the water repellent include fluorine-based, paraffin-based, zircon-based, alkylamide-based and silicon-based, and the like, wherein the fluorine-based water-repellent refers to a perfluoroalkyl group having self-reactive groups such as epoxy groups, methylol groups, chlorotriazine groups, and block isocyanate groups in the molecule. Perfluoroalkyl group-containing compound having an anionic group such as a perfluoroalkyl group-containing compound having a reactive group capable of reacting through a multifunctional crosslinking agent such as a compound, a hydroxyl group, an amino group and a carboxyl group, a phosphate ester group, a sulfonic acid group and a sulfuric acid ester group And copolymerizable polymerizable perfluoroalkyl group-containing vinyl monomers, homopolymers thereof or other copolymerizable vinyl monomers.

Examples of commercially available water repellents include paraffin-based resins such as NUVA-TTC (manufactured by Clariant), Asahi Guard AG-7000 (manufactured by Meisei Kagaku), NK Guard NDN-7E (manufactured by Nikka Kagaku), and the like. Palladium A (manufactured by Meisei Chemical Co., Ltd.), High Ripple K-320 (manufactured by Sankoriken), Palladium A (manufactured by Ohara Palladium), Reperlite P-120 (manufactured by Kyoeisha Kagaku), etc. In addition, palladium SPH (made by Ohara palladium), sun softener AM-200 (made by Nikka Kagaku), such as alkylamide system, light silicon P-316 (made by Kyoeisha Kagaku), dry phone 500 (Nikka Kaga) Commercial items, such as coupe) can be used. In particular, a fluorine-based compound is preferable because a good water repellent effect can be obtained.

The thickener is selected from at least one of natural or synthetic water-soluble polymers such as sodium alginate, carboxymethyl cellulose, hydroxyethyl cellulose, locust bean gum, tragaganth gum, guar gum, gum arabic, gelatin, polyvinyl alcohol.

The content of the additive is 0.3 to 4.5% by weight o.w.f, preferably 0.5 to 3.5% by weight o.w.f relative to the weight of the nanofiber fabric to be dyed.

If the content of the additive is less than 0.3% by weight o.w.f, there is almost no effect of adding the additive. If the content is more than 4.5% by weight o.w.f, the fastness is lowered and the touch feeling is lowered, which is not preferable.

In the preparation of the salt solution according to an embodiment of the present invention, water may be used as a medium for dispersing and dissolving the above-described colorant, binder, and additive.

The content of the medium may be added so that the concentration of the entire solid content such as colorant is 4 to 15% by weight, preferably 6 to 11% by weight. In determining the content of the medium, when the concentration of the total solid content is less than 4% by weight, dyeing, washing and friction fastness are lowered, and when it exceeds 15% by weight, the dyeing property is increased but the touch feeling is poor, which is not preferable.

Next, look at the step of adsorbing the salt solution to the nanofiber fabric as follows.

Adsorption of the salt solution to the nanofiber fabric may be divided into a front squeegee method and a precipitated double-sided padding method.

In this case, the method may further include pre-drying the nanofiber fabric between the step of adsorbing the saline solution to the nanofiber fabric and drying the nanofiber fabric to which the saline is adsorbed using a far-infrared dyeing machine.

The preliminary drying step is 10 to 50 parts by weight, based on 100 parts by weight of the nanofiber fabric, the moisture contained in the nanofiber fabric while passing through the pre-drying roller equipped with a heater to the nanofiber fabric adsorbed salt solution A process of reducing the amount of residual water to a level of 20 to 30 parts by weight. If the amount of residual water is less than 10 parts by weight, water content necessary for dyeing is insufficient, resulting in damage to fabric and inferior dyeing. If it is more than 50 parts by weight, the pre-drying is insufficient, so that the dyeing property and the pick-up rate are lowered, which is not preferable.

At this time, the temperature of the heater mounted on the preliminary drying roller is 100 to 120 ℃, preferably 105 to 115 ℃, if the temperature is less than 100 ℃ has almost no effect of drying, if the temperature is higher than 120 ℃ the fabric may deteriorate Not desirable

Moreover, the time of predrying is 30 second-1 minute, Preferably it is 40 second-55 second. If the time of the predrying is less than 30 seconds, there is almost no effect of predrying, and if it is more than 1 minute, the fabric may deteriorate, which is not preferable.

Looking specifically at the step of adsorbing the salt solution to the nanofiber fabric, it can be shown in Figures 2 and 3. At this time, an example including a predrying step is shown, but this is optional, and the present invention is not limited thereto.

First, as a front squeegeeing method as shown in Figure 2 includes applying a salt solution to the nanofiber fabric, specifically, the nanofiber fabric 21 supplied from the nanofiber fabric supply unit 20 is a supply roller The dye solution is applied to the nanofiber fabric while passing through the colorant applying roller 23 provided with the salt solution portion 25 and the squeegeeing knife 26 via (22).

Thereafter, the water in the salt solution is removed through the preliminary drying rollers 27 and 28, and is transported toward the far-infrared dyeing machine 29. In this case, a plurality of colors may be applied to the nanofiber fabric by further installing a colorant applying roller 24 having a different color.

Second, the step of immersing the nanofiber fabric in the treatment tank containing the salt solution as a precipitation double-sided padding method as shown in Figure 3; And pressing the nanofiber fabric immersed in the salt solution. Specifically, the nanofiber fabric 31 supplied from the nanofiber fabric supply unit 30 passes through the coloring treatment tank 35 provided with the salt solution 33 and the treatment tank roller 34 via the supply roller 32. While the nanofiber fabric is immersed in the salt solution, the salt solution is sufficiently adsorbed. In this case, when an additive such as a water repellent is further included in the salt solution, the additive is also sufficiently adsorbed onto the nanofiber fabric. Subsequently, the colorant and other additives are compressed to be sufficiently applied to the nanofiber fabric while passing through the pressing roller 36, and then water in the salt solution is removed through the predrying rollers 37 and 38, and the far-infrared dyeing machine 39 Is transported to the side.

Third, a method of simultaneously proceeding by combining the front squeegeeing method and the precipitation double-sided padding method is also possible. That is, the step of adsorbing the salt solution to the nanofiber fabric is the step of immersing the nanofiber fabric in the treatment tank containing the salt solution, and pressing the nanofiber fabric immersed in the salt solution; And applying the salt solution to the nanofiber fabric at the same time. Thus, it is possible to give two or more patterns and colors to the nanofiber fabric in one continuous dyeing process.

The content of the salt solution adsorbed on the nanofiber fabric is such that the pickup rate is 5 to 40% by weight, preferably 10 to 30% by weight. When the pick-up rate is less than 5%, the dyeing fastness is lowered, and when the pick-up rate is higher than 40%, moisture remaining in the nanofiber fabric is high, which may cause contamination and defects of the fabric in the dyeing step using a far infrared dyeing machine.

Finally, the method according to an embodiment of the present invention is completed the dyeing of the nanofiber fabric through the step of drying the nanofiber fabric adsorbed by the salt solution using a far-infrared dyeing machine.

Looking at the drying step using the far infrared dyeing machine with reference to Figure 1 as follows.

That is, the far-infrared dyeing machine is a nano-fabric (13) of a rectangular housing (13) arranged long in the conveying direction of the (1) in order to prevent the heat released to the outside, frames for fixing the housing, the front of the housing , The conveying belt 6 driven by the conveying rollers 5, 7, the conveying rollers 5, 7 provided at the rear end, and the nanofiber fabric 1 supported and conveyed on the upper surface of the conveying belt. It consists of far-infrared heaters 8 for irradiating far-infrared rays .. A circulating fan 9 is installed on the upper portion of the far-infrared heater 8 and driven by a fan motor 10. In addition, the upper portion of the housing 13 is discharged. A duct 11 is formed to discharge the dried air to the outside, and a cooling air discharge duct 12 is provided at the rear end of the far-infrared dyeing machine.

Therefore, the nanofiber fabric 1 to which the salt solution is adsorbed is transferred into the far-infrared dyeing machine through the conveying belts 6 driven by the conveying rollers 5 and 7, wherein the far-infrared heater 8 located above the conveying belts. The nanofiber fabric is heated by the drying process. A plurality of circulation fans 9 are positioned on the far infrared heater, which serves to uniformly occur throughout the nanofiber fabric without partial dyeing by concentrating water vapor discharged during the drying process in a specific place. The circulation fan 9 is operated by a fan motor 10 located thereon.

In addition, the upper surface of the housing 13 is provided with a discharge duct 11 for discharging the dried air to the outside to discharge the dried air inside the housing 13 to the outside.

Finally, the cooling air discharge duct 12 is installed vertically above the nanofiber fabric conveyed by the transfer belt 6, and serves to rapidly cool the heated nanofiber fabric by discharging air at room temperature. .

Then, the nanofiber fabric dried while passing through the far-infrared dyeing machine is wound by the winding roller 14.

In other words, the drying step using the far-infrared dyeing machine according to an embodiment of the present invention is directed to the radiant heating of far-infrared radiation having direct and instantaneous electromagnetic properties of heat transfer rather than a heating method using intermediate media such as conduction or convection. By maximizing the movement of each molecule of the nanofibers, ie translation, rotation and vibration movements, the colorant (dye or pigment) is brought about through the rearrangement of the mutual molecular arrangements. The chromophores and chromophores, which are the expression of the chromophores, promote high molecular color fastness by promoting nanofiber molecular structure and binding.

At this time, the irradiation distance from the far-infrared heater to the nanofiber fabric, which is the salt solution, is 150 to 400 mm, preferably 200 to 300 mm. In this case, if the distance is less than 150mm, deterioration may occur to the fabric, and if it is more than 400mm, the dyeing rate is lowered, which is not preferable.

The dyeing step by the far infrared heater is performed at a temperature of 80 to 300 ° C, preferably 100 to 150 ° C for 1.5 to 3.5 minutes, preferably 2 to 3 minutes.

If the drying temperature is less than 80 ℃, there is almost no dyeing effect, if it is above 300 ℃ nanofiber fabric is deteriorated is not preferable, if the drying time is less than 1.5 minutes, there is almost no drying effect, if more than 3.5 minutes time exposed to heat This increase is undesirable because the nanofiber fabric may be deformed.

In addition, the wavelength of the far infrared ray of the said far infrared heater is 6-11 micrometers, Preferably it is 6-7 micrometers. If the wavelength is less than 6㎛ far infrared rays are transmitted through the nanofiber fabric has a low depth to simply heat only the applied colorant does not effect the coloring effect, the colorant is dried on the nanofiber fabric occurs, if more than 11㎛ far-infrared Since the penetrating power of is increased, the phenomenon that energy is leaked to the outside becomes worse, so that the colorant and the nanofiber fabric are not heated, and drying is not effective, which is not preferable.

Nanofiber fabric according to an embodiment of the present invention includes a substrate and a nanofiber web formed on the substrate.

The nanofibers are ultra-fine filaments having an average diameter of 800 to 900 nm, and may be prepared by spinning a polymer solution by microfiber flash spinning, static spinning, melt blow spinning, electro blow spinning, or electro flash hybrid spinning. After the nanofibers are discharged to the spinning nozzle, the nanofibers are collected in a web state at the bottom thereof to form a nano oil-based web.

The polymer may be any conventional synthetic resin such as a thermoplastic resin and a thermosetting resin. Non-limiting examples of the polymer include polyimide, polyamide, polyaramid, polybenzimidazole, polyetherimide, polyacrylonitrile, polyethylene, polypropylene, polyaniline, polyethylene oxide, polyethylene naphthalate, polybutylene tere Phthalates, styrene-butadiene-rubbers (SBR), polystyrene, polyvinyl chloride, polyvinylalcohol, polyvinylidene fluoride, polyvinylbutylene, polyethylene terephthalate, and polysulfones are possible, but are not limited to these.

A solvent is selected according to these polymers to prepare a polymer solution.

As the base material of the nanofiber fabric used in the embodiment of the present invention, a non-woven fabric such as a meltblown nonwoven fabric, a spunbond nonwoven fabric, a needle punching and a spunlace nonwoven fabric, a fabric, a knitted fabric, a paper, or a nanofiber web layer may be used. There is no limit.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the present invention is not limited to the following examples.

Example 1

As a nanofiber fabric, a nanofiber fabric manufactured by Nanotechnics Co., Ltd. was used. The nanofiber fabric first obtained a nanofiber having an average diameter of 830 nm prepared by electrospinning using formic acid with nylon 66 (Dupont) as a solvent, followed by a nanofiber web made of the nanofiber (30 g / m ² ) and a polyester suede substrate (200 g / m ² ) are manufactured by adhering the water punching method.

In addition, 3% by weight owf of pigment resin (One Plus, black LB (jet black pigment)), 5% by weight owf of binder (OnePlus K_110), 2% by weight owf of water repellent (Daeyoung Chemical, S-300), and thickener (One Plus D71 Co., Ltd.) A salt solution was prepared by supplying water to 1 wt% owf so that the total solid content concentration was 10 wt%.

Subsequently, using the precipitation double-sided padding method as shown in Figure 3, the nanofiber fabric is immersed in a coloring treatment tank into which the salt solution prepared in advance, so that the saline solution is sufficiently adsorbed, and then picked up from the compression roller via a transfer belt. It was pressed so that the rate was 20%. The pressed nanofiber fabric was dyed and wound for 3 minutes at 120 ° C. controlled temperature conditions in a far-infrared dyeing machine equipped with a far-infrared heater having a wavelength of 10 μm and having an irradiation distance of 250 mm from the nanofiber fabric to complete dyeing. Then, the dyeing fastness of the dyed nanofiber fabric was evaluated.

Example 2

After passing through the pressing roller, and before being transferred to the far-infrared dyeing machine, except that the step of further drying the compressed nanofiber fabric in a predrying roller equipped with a heater set to a temperature of 110 ℃ for 45 seconds It was stained under the same conditions as. Then, the dyeing fastness of the dyed nanofiber fabric was evaluated.

Example 3

By using the front squeegeeing method as shown in FIG. 2, except that the salt solution is applied to the nanofiber fabric by passing the nanofiber fabric to the dye applying roller equipped with the salt solution and the squeegeeing knife equipped with the salt solution. Then, it stained under the same conditions as in Example 1. Then, the dyeing fastness of the dyed nanofiber fabric was evaluated.

Example 4

After passing through the colorant applying roller and before being transferred to the far-infrared dyeing machine, except that the dye-coated nanofiber fabric is further dried in a predrying roller equipped with a heater set at a temperature of 110 ° C. for 45 seconds. Staining was carried out under the same conditions as in Example 3. Then, the dyeing fastness of the dyed nanofiber fabric was evaluated.

Comparative Example 1

The nanofiber fabric was dyed under the same conditions as in Example 2 except for dyeing treatment at 150 ° C. for 5 minutes using a steamer.

However, after the type of dyeing treatment, it was confirmed that the nanofiber web of the nanofiber fabric was separated from the substrate by the moisture of the steamer, and many nanofibers were broken and contaminated, so that the dyeing fastness could not be evaluated.

Dye Fastness Evaluation

The dyeing fastnesses of the dyed nanofiber fabrics obtained in Examples 1 to 4 were evaluated under the following conditions.

Daylight Fastness Test

The fastness of daylight was measured under the method and conditions described in KS K ISO 105 B02: 2005 by requesting the Korea Textile Materials Processing Institute, 666-2, Namsu-ri, Yangju-si, Gyeonggi-do.

Laundry fastness test

The color fastness of the laundry was measured in accordance with the method and conditions described in KS K ISO 105 C01: 2007 by requesting the Korea Textile and Materials Research Institute, 666-2, Namsu-ri, Yangju-si, Gyeonggi-do.

The grades of the color fastnesses of Examples 1 to 4 are shown in Table 1 below. In washing fastness, the first grade is the lowest wash fastness, the fifth grade is the highest wash fastness. However, in daylight fastness, Class 1 is the lowest daylight fastness, and Class 8 is the highest daylight fastness.

Dyeing fastness Color fastness Example 1 Grade 4 Grade 4 Example 2 Grade 4 Grade 4 Example 3 Grade 4 Grade 4 Example 4 Grade 4 Grade 4

Referring to Table 1, in the case of Examples 1 to 4 using the dyeing method of the nanofiber fabric of the present invention, it was confirmed that both the light fastness and the wash fastness were excellent. On the other hand, in the case of dyeing the nanofiber fabric by the conventional printing method using a steamer, the nanofiber web is separated from the substrate by moisture during the heat treatment process and the nanofiber fabric is damaged, so that the dyeing treatment itself is impossible.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

1 is a schematic diagram of a far-infrared dyeing machine used in the dyeing method of the nanofiber fabric according to an embodiment of the present invention.

Figure 2 is a schematic diagram of the adsorption step of the salt solution of the dyeing method according to an embodiment of the present invention.

Figure 3 is a schematic diagram of the adsorption step of the salt solution of the dyeing method according to an embodiment of the present invention.

<Brief description of symbols used in the drawings>

1, 21, 31: nanofiber fabric 2, 22, 32: feed roller

3, 3 ', 23, 24: coloring agent applying roller

4, 27, 28, 37, 38: predrying roller

5, 7: feed roller 6: feed belt

8: Far infrared heater 9: circulation fan

10: fan motor 11: exhaust duct

12: cooling air exhaust duct 13: housing

14: winding roller 20, 30: nanofiber fabric supply portion

25: salt solution 26: squeezing knife

29, 39: far infrared dyeing machine 33: saline solution

34: treatment tank roller 35: coloring treatment tank

36: crimping roller

Claims (11)

Preparing a salt solution containing a colorant and a binder; Adsorbing the salt solution on a nanofiber fabric; And Drying the nanofiber fabric adsorbed the saline solution using a far-infrared dyeing machine, The nanofiber fabric dyeing method of the nanofiber fabric, characterized in that it comprises a substrate and a nanofiber web formed on the substrate. The method of dyeing a nanofiber fabric according to claim 1, wherein the salt solution further comprises an additive. The method according to claim 1, wherein the step of adsorbing the saline solution to the nanofiber fabric comprises: immersing the nanofiber fabric into a treatment tank including the saline solution; And pressing the nanofiber fabric immersed in the saline solution. The method of claim 1, wherein the step of adsorbing the saline solution to the nanofiber fabric comprises applying the saline solution to the nanofiber fabric. The method of claim 1, wherein the step of adsorbing the saline solution to the nanofiber fabric comprises: immersing the nanofiber fabric in a treatment tank including the saline solution and compressing the nanofiber fabric in which the saline solution is immersed; And applying the salt solution to the nanofiber fabric at the same time. The method of claim 1, further comprising pre-drying the nanofiber fabric between adsorbing the saline solution to the nanofiber fabric and drying the nanofiber fabric to which the saline solution is adsorbed using a far-infrared dyeing machine. Dyeing method of a nanofiber fabric characterized in that. The method of dyeing a nanofiber fabric according to claim 1, wherein the drying step is performed at a temperature of 80 to 300 ° C. for 1.5 to 3.5 minutes. The method of dyeing a nanofiber fabric according to claim 1, wherein the wavelength of the far infrared rays is 6 to 11 µm. delete The method of dyeing a nanofiber fabric according to claim 1, wherein the nanofiber web is produced by spinning a polymer solution by flash spinning, static spinning, melt blow spinning, electro blow spinning, or electro flash hybrid spinning. The method of claim 10, wherein the polymer is polyimide, polyamide, polyaramid, polybenzimidazole, polyetherimide, polyacrylonitrile, polyethylene, polypropylene, polyaniline, polyethylene oxide, polyethylene naphthalate, polybutylene tere At least one selected from the group consisting of phthalate, styrene-butadiene-rubber (SBR), polystyrene, polyvinyl chloride, polyvinyl alcohol, polyvinylidene fluoride, polyvinylbutylene, polyethylene terephthalate, and polysulfone Method of dyeing nanofiber fabrics.

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