KR102605948B1 - Infrared light transmission clothing for heating chamber - Google Patents

Abstract

The near-infrared ray-transmitting clothing for a heating chamber of the present invention includes nano-nonwoven fabric on the innermost side of the clothing; SnO ₂ Nd on the nanononwoven fabric; It is characterized by sequentially stacking an AZO thin film on the SnO ₂ Nd thin film, an alumina nanocarbon fiber on the AZO thin film, a silicon thin film on the alumina nanocarbon fiber, and an anti-reflection film (MgF2) on the silicon thin film. The nano-nonwoven fabric is formed to be in contact with the human skin, and the anti-reflection film (MgF2) is formed on the outside of the covering.
The near-infrared ray-transmitting clothing for a thermal chamber of the present invention has antibacterial activity, high thermal conductivity, excellent heat resistance, excellent chemical resistance and corrosion resistance, and is lightweight.

Description

Near-infrared transmission clothing for heating chamber {Infrared light transmission clothing for heating chamber}

The present invention relates to near-infrared ray-transmitting clothing for a heating chamber. More specifically, it is a technology that allows near-infrared rays to penetrate well in the near-infrared wavelength band (1000 nm to 2100 nm), which penetrates deepest into the human skin and increases body temperature, while preventing other wavelengths from penetrating well.

When other wavelengths are transmitted, the body temperature is heated by wavelengths that cannot penetrate deep into the skin, which causes the problem of reduced effectiveness of the heating chamber.

A person's normal body temperature is 36.5℃, and the temperature inside the body where the internal organs are located is preferably around 37℃. The skin surface temperature is around 34-35℃, which is somewhat lower than the core body temperature. Our body is greatly influenced by core body temperature. Even if core body temperature increases or decreases by just 0.5 to 1 degrees Celsius, the activities that release, convert, and store energy are affected.

It is known that when core body temperature rises by 1℃, the basal metabolic rate increases by 15%. Conversely, when body temperature drops, blood circulation does not work properly, and oxygen, nutrients, and immune substances carried by blood are not properly transported throughout the body, which breaks the balance in the body and makes it easy to be exposed to various diseases. In this way, core body temperature plays an important role in regulating body temperature and increasing immunity. In particular, cancer patients often have lower body temperatures than the general public, because cancer cells like cold environments, making the body colder. It is a well-known fact that cancer cells are weak to heat and hate heat.

The visible light range is 380nm (purple) to 780nm (red), and infrared is an electromagnetic wave that has a stronger thermal effect than the red of visible light, and the infrared range is divided into 0.78㎛~1mm. 780nm∼3000nm is called near infrared rays. A large amount of these infrared rays are radiated on Earth by solar rays in natural conditions. Even at room temperature, trace amounts of radiation are emitted between substances. Near-infrared rays can see deep into an object and promote biological activity by vibrating the molecules that make up the object. In other words, when near-infrared rays penetrate the living body because they have good absorption, they are effective in dilating microvasculature along with resonance effect, and are used as physiological energy of the living body, which is an important factor in the growth, reproduction, and maintenance of health of the living body.

Near-infrared rays penetrate up to 6mm, which is 12 times deeper than far-infrared rays, which penetrate up to 0.5mm of the skin, activating skin cells and preventing skin aging by promoting the production of collagen and elastin, which are components of the skin.

As background technology for the present invention, Republic of Korea Patent Publication No. 10-2334478, “Method for manufacturing an optical laminate including a thermochromic layer with excellent optical properties by controlling photoevaporation and optical sintering conditions” (hereinafter referred to as “Prior Art 1”) ") is an optical laminate that includes a thermochromic layer containing vanadium oxide particles, the adhesive strength of the thermochromic layer and the substrate is 50 N/m or more, and the thermochromic layer is controlled to have a specific void area ratio. This technology relates to the laminate having excellent visible light transmittance and infrared transmittance.

However, Prior Art 1 is a technology that aims to transmit only near-infrared rays, which is intended to be achieved in the present invention, by transmitting even visible light.

In addition, Republic of Korea Patent Publication No. 10-1964165 "Method for manufacturing non-woven fabric with blood circulation and antibacterial properties" (hereinafter referred to as "Prior Art 2") relates to a method for manufacturing non-woven fabric with blood circulation and antibacterial properties. Prior art 2 is a non-woven fabric that is widely used for clothing as well as medical and industrial purposes, which is manufactured by spinning electrospinning liquid containing zinc oxide and pegmatite powder, thereby strengthening antibacterial properties and blood circulation promotion functions, and in addition, water-repellent properties. It is about a method of manufacturing non-woven fabric with improved blood circulation and antibacterial properties that can also implement properties and deodorizing functions, thereby contributing to the improvement of human health.

However, Prior Art 2 only describes a technology for emitting far-infrared rays, but is a technology that is far from transmitting only near-infrared rays, which is intended to be achieved in the present invention.

(0001) Republic of Korea Patent Publication No. 10-2334478 (0002) Republic of Korea Patent Publication No. 10-1964165

The purpose of the present invention is to provide near-infrared ray-transmitting clothing for a thermal chamber that transmits near-infrared rays in the wavelength range of 1000 nm to 2100 nm within the thermal therapy chamber.

Another object of the present invention is to provide near-infrared ray-transmitting clothing for a heating chamber that has antibacterial activity, high thermal conductivity, excellent heat resistance, excellent chemical resistance and corrosion resistance, and excellent lightness.

The near-infrared ray-transmitting clothing for a heating chamber of the present invention includes a nano-nonwoven fabric on the innermost side of the clothing, a SnO ₂ Nd thin film on the nano-non-woven fabric, an AZO thin film on the SnO ₂ Nd thin film, an alumina nanocarbon fiber on the AZO thin film, and an alumina nanocarbon fiber. It is characterized by sequentially stacking a silicon thin film on top and an anti-reflection film (MgF2) on the silicon thin film.

In addition, in the near-infrared ray-transmitting clothing for a heating chamber of the present invention, the nano-nonwoven fabric is composed of a tungsten precursor ((NH4) ₆ [H ₂ W ₁₂ O ₄₀ ]·nH ₂ O), a cesium precursor (Cs ₂ CO ₃ ), and a precursor mixture solution. Polyvinylpyrrolidone (PVP, C ₆ H ₉ NO)n), which is advantageous for fiber spinning conditions, is selected as a polymer, and nanowires are formed by electrospinning according to the concentration of PVP using H ₂ O as a solvent;

The manufactured nanowires are placed in an alumina crucible and fired for 3 hours using a sintering furnace, followed by heat treatment at 600°C in an air atmosphere; A mixture of the nanowire dispersion and a hard coating agent, which is a UV curable resin, in a molar ratio of 73.1:26.9 was coated on the prepared nanowires to a thickness of 4㎛; It is characterized by drying in a hot air dryer at 80°C for 2 minutes.

In addition, in the near-infrared ray-transmitting clothing for a heating chamber of the present invention, the thickness of the AZO thin film is 600 nm; The thickness of the alumina nanocarbon fiber is 150 to 600 nm, and the thickness of the anti-reflection film (MgF2) is 80 nm.

In addition, the near-infrared ray-transmitting clothing for a heating chamber of the present invention is characterized in that the nano-nonwoven fabric is formed so as to be in contact with the human skin, and the anti-reflection film (MgF2) is formed on the outside of the clothing.

The near-infrared ray-transmitting clothing for a thermal chamber of the present invention has the effect of effectively transmitting near-infrared rays with a wavelength of 1000 nm to 2100 nm within the thermal therapy chamber.

The near-infrared ray-transmitting clothing of the present invention has the effect of effectively transmitting near-infrared rays at a wavelength of 1000 nm to 2100 nm and preventing transmission of other wavelengths.

The near-infrared ray-transmitting clothing for a thermal chamber of the present invention has antibacterial activity, high thermal conductivity, excellent heat resistance, excellent chemical resistance and corrosion resistance, and is lightweight.

1 is an overall schematic diagram.
Figure 2 is a graph showing the near-infrared transmittance of nanononwoven fabric.
Figure 3 is a graph showing the near-infrared transmittance of a ZnO thin film, a ZnONd thin film, a SnO ₂ thin film, and a SnO ₂ Nd thin film.
Figure 4 is an SEM photograph of (a) ZnONd and (b) ZnO.
Figure 5 is a graph showing the near-infrared transmittance according to the deposition temperature of AZO.
Figure 6 is a graph showing the energy band gap according to the deposition temperature of AZO.
Figure 7 is a graph showing the near-infrared transmittance of alumina nanocarbon fibers.
Figure 8 is a cross-sectional surface photo of alumina nanocarbon fiber.
Figure 9 is a graph showing the near-infrared transmittance of a silicon thin film.
Figure 10 is an SEM photo of the anti-reflection film (MgF ₂₎ .
Figure 11 is a graph showing the near-infrared ray transmittance of clothing according to the present invention.

Hereinafter, in the description, only the parts necessary to understand the content of the present invention will be described, and descriptions of other known technologies will be omitted so as not to confuse the gist of the present invention.

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

Figure 1 is an overall schematic diagram, and Figure 2 is a graph showing the near-infrared transmittance of the nanononwoven fabric. Figure 3 is a graph showing the near-infrared transmittance of a ZnO thin film, a ZnONd thin film, a SnO ₂ thin film, and a SnO ₂ Nd thin film, and Figure 4 is an SEM photograph of (a) ZnONd and (b) ZnO.

Figure 5 is a graph showing the near-infrared transmittance according to the deposition temperature of AZO, and Figure 6 is a graph showing the energy band gap according to the deposition temperature of AZO. Figure 7 is a graph showing the near-infrared ray transmittance of alumina nanocarbon fiber, and Figure 8 is a cross-sectional surface photo of alumina nanocarbon fiber. Figure 9 is a graph showing the near-infrared transmittance of a silicon thin film.

Figure 10 is an SEM photo of the anti-reflection film (MgF ₂₎ , and Figure 11 is a graph showing the near-infrared transmittance of clothing according to the present invention.

The human skin is made up of keratin/epidermis, dermis, subcutaneous fat, and muscle. A depth of 4 mm or more is called subcutaneous fat, and the thickness of the subcutaneous fat layer is about 2 mm.

In the present invention, by heating the subcutaneous fat layer, especially at a depth of 5 mm or more, it is possible to most effectively warm the layer in a short time, thereby reducing the patient's fatigue and improving the turnover rate of the heating chamber. The near-infrared wavelengths of 1050 nm to 1350 nm used in the embodiments of the present invention penetrate a skin depth of 5 mm or more and warm the human body.

Near-infrared rays penetrate the skin up to about 6mm. While far-infrared rays are mostly absorbed by the skin's dead skin cells and are no longer transmitted, near-infrared rays penetrate deep into the skin. If there is a tumor such as cancer, it is necessary to adjust the wavelength to ensure the deepest penetration. The near-infrared region, which penetrates more than 5 mm deep into the skin, is 1050 nm to 1350 nm. The wavelengths between the zones most efficiently penetrate deep into the skin and cause body warming.

Therefore, an embodiment of the present invention seeks to provide clothing that transmits near-infrared rays well in the wavelength band of 1050 nm to 1350 nm. “Clothing” as used in the present invention generally means “clothes” or “clothing,” and is collectively referred to as “clothing” for convenience.

Depending on the purpose of the lighting device, it can be added as an auxiliary light source for light therapy and configured in the device. Light therapy can deliver light deep into the skin, promote cell growth, relax muscles, and help treat wounds.

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Infrared rays are classified into near infrared rays, mid infrared rays, and far infrared rays according to their wavelength.

Each wavelength classification is slightly different depending on the academic society or association, but in ISO 20473, it is classified as follows [Table 1].

appointed abbreviation wavelength near infrared NIR 780~3000nm mid-infrared MIR 3~50μm Far infrared rays FIR 50~1000μm

Near-infrared rays are electromagnetic waves with a wavelength of about 780-3000 nm, which has a wavelength close to red visible light. It also has properties close to visible light.

Near-infrared rays are light with a much shorter wavelength than far-infrared rays, and their penetration power is more than 10 times deeper than that of far-infrared rays. Mid-infrared rays are electromagnetic waves with a wavelength of about 3 to 50 μm and are classified as a part of near-infrared rays. In the case of far-infrared rays with long wavelengths, they are attenuated within 0.2 mm from the skin surface and the energy becomes 0. The area within 0.2mm from the skin surface corresponds to the dead skin cells.

Conventionally, when a user enters a heating chamber wearing clothes, near-infrared rays cannot penetrate the clothing, so when entering the heating chamber, the user must enter the heating chamber without wearing any clothes. Because you go in without clothes, the psychological burden is great depending on the person, and the temperature inside the heating chamber is high, so you secrete sweat. The sweat flows on the floor of the heating chamber, not only making your body slippery, but also making your body slippery. After a user finishes using it, it takes a lot of time to clean it when the next user enters, and problems of contamination also arise.

The purpose of the present invention is to provide clothing that transmits near-infrared rays well in order to solve this problem.

Hereinafter, the present invention will be described in detail.

Figure 1 shows an overall schematic diagram.

The object of the present invention is to provide clothing that transmits near-infrared rays well.

As shown in Figure 1, clothing that transmits near-infrared rays well has a nano-nonwoven fabric 10 on the innermost side of the clothing, a SnO ₂ Nd thin film 20 on the nano-non-woven fabric 10, and a SnO ₂ Nd thin film 20 on the innermost layer of the clothing. AZO thin film 30, alumina nanocarbon fiber 40 on the AZO thin film 30, silicon on the alumina nanocarbon fiber 40 ₎ thin film 50, anti-reflection film (MgF2) on the silicon thin film 50 ( 60).

The present invention is to sequentially stack nano-nonwoven fabric (10) - SnO ₂ Nd thin film (20) - AZO thin film (30) - alumina nanocarbon fiber (40) - silicon thin film (50) - anti-reflection film (MgF2) (60) to emit near-infrared rays. It is characterized in that it constitutes clothing that transmits.

Hereinafter, each laminated thin film will be described in detail.

SnO ₂ Nd is SnO ₂ (tin oxide) doped with Nd. SnO ₂ Nd is an oxide semiconductor that is transparent in the visible light region and has electrical semiconductor properties.
AZO (Al doped Zinc Oxide) refers to zinc oxide doped with aluminum.

Figure 2 is a graph showing the infrared transmittance of nanononwoven fabric.

The nanononwoven fabric manufacturing method will be described in detail.

Tungsten and cesium are used as precursors, and citric acid is used as a complexing agent. The molar ratio of tungsten (n(W)): cesium (n(Cs)): citric acid (n(CA)) is 1:0.33:0.33, which is used as a starting material to form nanowires.

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Tungsten precursor ((NH4) ₆ [H ₂ W ₁₂ O ₄₀ ]·nH ₂ O), cesium precursor (Cs ₂ CO ₃ ), and polyvinylpyrrolidone (PVP, C ₆ ), which are favorable for fiber spinning conditions of the precursor mixture solution. H ₉ NO)n) is selected as the polymer, and nanowires are formed by electrospinning according to the concentration of PVP using H ₂ O as a solvent.

During the electrospinning process, the control parameters of nanowire formation are as follows.

- Solution supply injection rate: 0.005 ml/min (0.3 ml/h)

- Distance between nozzle tip and collection unit (collector) (TCD): 10 cm · Feed amount: 0.005ml/min

- PVP content: 1.51g Applied voltage: 12~24kV H2O: 20g

The manufactured nanowires are placed in an alumina crucible and fired for 3 hours using a sintering furnace, followed by heat treatment at 600°C in an air atmosphere. As a result of SEM analysis, it had a nanowire shape after sintering, and as the sintering temperature increased, the length of the wire tended to become shorter.

When fired in an air atmosphere, it turns yellow, and when fired in an N ₂ atmosphere, it turns dark blue. Since dark blue has the property of blocking infrared rays, it is preferable not to sinter in an N ₂ atmosphere.

In order to check the dispersibility of the nanowire dispersion according to the dispersion time of the nanowires prepared above, dispersion was performed for 48 hours, and as a result, agglomerated particles were dispersed with an average particle diameter of about 34 nm. As a dispersant, an amine value of 4 mgKOH/g is used, and as a dispersant, MEK (Methyl Ethyl Ketone) is used.

The molar ratio of nanowire: dispersant: dispersant (MEK) is 20:2:78.

Next, to manufacture a hard coating agent that is a UV-curable resin, commercially available monomers and oligomers are selected to prepare a hard coating agent.

UV curable hard coating consists of acrylate oligomer, monomer, solvent and additives. That is, UA-664 (Urethane acrylate (ali)), HDODA (1,6-hexanediol diacrylate), TMPTA (Trimethylolpropane triacrylate), TPGDA (Tripropylene glycol diacrylate) monomer and photoinitiator (2,2-dimethoxy2-phenylacetophenone (DMPA)). It is prepared by adding it to a beaker and stirring it for 1 hour with a mixer. Each mixing ratio in mole ratio is as follows.

The ratio of UA-664: HDODA: TMPTA: TPGDA: photoinitiator is 35:23:20:17:5. In this way, UV curable resin is manufactured.

Afterwards, the UV curable resin is used, MEK (Methyl Ethyl Ketone) and PGME (Propylene glycol monomethyl ether) are used as solvents, and a reactive fluorine-based surfactant is applied as a leveling agent. The mixing ratio in moles (mol) is as follows.

UV curable resin: MEK: PGME: surfactant ratio is 53.5:26:20:0.5.

The nanowire dispersion prepared above is mixed with the hard coating agent prepared above. By optimizing the mixing ratio (mol) of the prepared nanowire dispersion and hard coating agent to 73.1:26.9, a coating agent that simultaneously satisfies an infrared transmittance of 70% or more and has excellent hardness, scratch resistance, and light resistance is manufactured.

Adjust the thickness to about 4㎛, coat it, and dry it for 2 minutes using a hot air dryer at 80℃.

The dried specimen is cured by passing it through a UV curing device equipped with an 80W high-pressure mercury lamp to increase physical properties such as scratch resistance, infrared transmittance, and adhesion.

The infrared transmittance of the nanononwoven fabric prepared in this way is shown graphically in Figure 2.

According to Figure 2, it can be seen that transmission begins at a wavelength of about 300 nm or more, drops to less than 70% at a wavelength of about 1600 nm, then rises again, and the overall transmittance rapidly decreases from a wavelength of about 2350 nm.

Figure 3 is a graph showing the near-infrared transmittance of a ZnO thin film, a ZnONd thin film, a SnO ₂ thin film, and a SnO ₂ Nd thin film.

ZnO thin films are deposited using a ZnO target using a sputtering method.

The near-infrared transmittance of Figure 3 is (i) a ZnO thin film, (ii) a ZnONd thin film doped with 1.6% of Nd in ZnO, (iii) a SnO ₂ thin film, and (iv) a SnO ₂ doped with 1.6% of Nd in SnO ₂ This is a comparison of the transmittance of Nd thin films.

That is, the transmittance of ZnO thin film, ZnONd thin film, SnO ₂ thin film, and SnO ₂ Nd thin film was compared. SnO2 thin films are deposited at 300°C because Nd is not well doped at RT (Room Temperature). In addition, deposition may be performed using a sputter system at RT.

At a wavelength of 1250 nm, the ZnONd thin film has the highest transmittance, followed by the ZnO thin film, then the SnO ₂ thin film, and then the SnO ₂ Nd thin film.

Overall, a ZnO Nd thin film doped with Nd has a slightly higher transmittance than an undoped Z nO thin film, so doping is preferable.

Figure 4 is an SEM photograph of (a) ZnONd and (b) ZnO.

As a result of analyzing the cross section and surface of the thin film using SEM analysis equipment, the thickness of the thin film was 610nm at 150℃, 590nm at 250℃, and 600nm at 350℃. There is no significant difference between ZnONd and ZnO, but Nd-doped ZnONd was deposited in smaller particles than ZnO.

It is most desirable to set the ZnONd deposition temperature to 250°C, which allows for the thinnest deposition.

Figure 5 is a graph showing the transmittance according to the deposition temperature of AZO, and Figure 6 is a graph showing the energy band gap according to the deposition temperature of AZO.

Looking at the permeability according to temperature in Figure 5, the analysis results showed that the permeability increases as the temperature increases.

An AZO thin film doped with Al on ZnO was deposited using a sputtering method while varying the deposition temperature from 150 to 350°C.

The deposited thickness was 590 nm at 250°C, which was thinner than 600 nm at 350°C, so the transmittance seemed to be the best when deposited at 250°C, but the transmittance was highest at 350°C.

The reason why the transmittance was high at 350°C was because the energy band gap increased as more Al was substituted with Zn ²⁺ and the Fermi level rose.

In addition, the above sputtering is deposition using RF power, and since deposition using RF power results in higher transmittance than deposition using DC power, it is more preferable to deposit using RF power. Transmittance indicates a transmittance of 85% or more in the wavelength range of 780 nm or more.

Therefore, in the present invention, deposition is performed at 350°C using RF power.

Figure 7 is a graph showing the near-infrared ray transmittance of alumina nanocarbon fiber, and Figure 8 is a cross-sectional surface photo of alumina nanocarbon fiber.

The optimal conditions for forming the nanostructure of alumina nanocarbon fiber oxide are 75wt% pyrophosphoric acid at a temperature of 20°C and an applied voltage of 30V. Aluminum oxide (Al ₂ O ₃ ) has antibacterial activity and is also known as a basic oxide because it facilitates the formation of hydroxide when the hydroxide reacts with water.

This is because aluminum, which belongs to the IIIA series of the periodic table, tends to emit electrons in the last energy level. This tendency is due to their metallic nature and low electronegativity, which imparts electrical conductivity and converts them into positive ions.

In contrast, oxygen has a higher electronegativity because it is a non-metal and is highly electronegative. Therefore, it tends to stabilize the last level of electronic energy by accepting electrons, becoming a negative ion.

The following [Table 2] shows the ingredient list of Al ₂ O ₃ used in the present invention.

Composition, % Al ₂ O ₃ 99.8% Na ₂ O 0.03% SiO ₂ 0.04% _{Fe2O3 _} 0.01% Ignition loss 0.3%

Bonds formed from nanocarbon fibers have strong bonding strength. Aluminum oxide (Al ₂ O ₃ ) is called alumina. Aluminum oxide is a white powder with a molecular weight of 101.96 g/mol, a specific gravity of 3.965 g/cm3, and a melting point of 2072°C. Aluminum oxide has excellent electrical insulation (1×10 ¹⁴ ~1×10 ¹⁵ Ωcm), high mechanical strength (300~630 MPa), compressive strength (2,000~4,000 MPa), high hardness (15~19 GPa), and thermal conductivity. It is high (20~30 W/mk) and has high corrosion resistance and wear resistance.

Alumina nanocarbon fiber is a fiber with particularly excellent wear resistance and heat resistance among ceramic fibers. It has a polycrystalline structure with a diameter of about 10㎛ and a thickness of 150~600㎚. Especially the surface is smooth. Alumina nanocarbon fiber has excellent heat resistance (>1000 degrees), chemical resistance, and corrosion resistance, is excellent in light weight, and has excellent tensile strength and modulus. As shown in Figure 7, compared to Al, alumina nanocarbon fiber has an infrared transmittance. very good.

Figure 8 is a cross-sectional surface photo of alumina nanocarbon fiber.

Figure 9 is a graph showing the near-infrared transmittance of a silicon thin film.

Generally, SiH ₄ gas diluted in H ₂ gas or N ₂ gas is used as a reaction gas to deposit a polycrystalline silicon thin film. In the present invention, in order to deposit a polycrystalline silicon thin film, the temperature of the reaction furnace is maintained at 625°C and the pressure is 0.3 torr as a standard process, and pure SiH ₄ gas without H ₂ gas or N ₂ gas is used as the reaction gas. Deposit a thin film.

The flow rate of the reaction gas was maintained at 30 cm ³ /min to achieve a deposition rate of 90 to 110 Å/min, and the standby temperature of the reactor was maintained at 400°C.

Since the thin film deposited below 600℃ has an amorphous phase, it is in an unstable state and crystallizes when heated even after deposition. Therefore, the deposition temperature of the thin film is set higher than 600℃.

In addition, in the temperature range where the deposition temperature is 600 ~ 750℃, the crystal particles are almost the same without temperature dependence, and there is an advantage that the deposition rate increases as the temperature increases. However, if the deposition temperature of the thin film is set to 650℃ or higher, the center Since the deposition rate at the portion and edge portion is different, the uniformity of the thickness of the thin film deteriorates, so 625°C is set as the deposition temperature for the thin film.

In an embodiment of the present invention, the SiO ₂ thin film 50 is formed by depositing a 50 μm polycrystalline silicon thin film.

Figure 10 is an SEM photo of an anti-reflection film (MgF ₂₎ .

Lastly, MgF ₂ is used as the anti-reflection film material formed on the outermost layer of the coating, and is deposited using a sputtering method.

If MgF ₂ is deposited to a thickness of 80 nm, the reflectance becomes about 1%, which is about 1/5 of the case where MgF ₂ is not deposited. This reduction in reflectance plays an important role in reducing the amount of reflection in multiple thin film layers consisting of 5 to 6 thin film layers.

Figure 11 is a graph showing the near-infrared transmittance of the coating according to the present invention.

It can be seen that near-infrared rays are well transmitted in the wavelength range of about 1000 nm to 2100 nm shown in FIG. 11.

The clothing according to the present invention has excellent antibacterial properties, breathability, and near-infrared ray permeability, making it suitable as clothing to be worn in a near-infrared heating chamber.

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The near-infrared ray-transmitting clothing for a heating chamber of the present invention has antibacterial activity, high thermal conductivity, excellent heat resistance, excellent chemical resistance and corrosion resistance, and is lightweight, making it an industrially useful invention.

10: Nano nonwoven fabric 20: SnO ₂ Nd thin film
30: AZO thin film 40: Alumina nanocarbon fiber
50: Silicon thin film 60: Anti-reflective film (MgF2)

Claims (8)

For clothing worn in a heating chamber,
A nano-nonwoven fabric (10) is laminated on the innermost part of the covering; SnO ₂ Nd thin film (20) on the nano-nonwoven fabric (10); AZO thin film (30) on the SnO ₂ Nd thin film (20); Alumina nanocarbon fibers (40) on the AZO thin film (30); A silicon thin film (50) on the alumina nanocarbon fiber (40); Near-infrared transmission clothing for a heating chamber, characterized in that an anti-reflection film (MgF2) (60) is sequentially laminated on the silicon thin film (50).
The method of claim 1, wherein the nano-nonwoven fabric 10 is prepared by using a tungsten precursor ((NH4) ₆ [H ₂ W ₁₂ O ₄₀ ]·nH ₂ O), a cesium precursor (Cs ₂ CO ₃ ), and a fiber-like spinning condition of the precursor mixture solution. polyvinylpyrrolidone (PVP, C ₆ H ₉ NO)n) _, which is advantageous for
The manufactured nanowires were placed in an alumina crucible and fired for 3 hours using a sintering furnace; Heat treatment at 600℃ in air atmosphere;
A mixture of nanowire dispersion and a hard coating agent, which is a UV curable resin, in a molar ratio of 73.1:26.9 was coated on the prepared nanowires to a thickness of 4㎛;
Near-infrared ray-transmitting clothing for a heating chamber, characterized by drying in a hot air dryer at 80°C for 2 minutes. delete The near-infrared ray-transmitting clothing for a heating chamber according to claim 1, wherein the AZO thin film (30) has a thickness of 600 nm.
The near-infrared ray-transmitting clothing for a heating chamber according to claim 1, wherein the alumina nanocarbon fiber (40) has a thickness of 150 to 600 nm.
delete The near-infrared ray-transmitting clothing for a heating chamber according to claim 1, wherein the anti-reflection film (MgF2) (60) has a thickness of 80 nm.
The method according to claim 1, wherein the nano-nonwoven fabric (10) is formed to be in contact with human skin; Near-infrared ray-transmitting clothing for a heating chamber, wherein the anti-reflection film (MgF2) 60 is formed on the outside of the clothing.

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