KR20160113572A - Coating structurre for product having antimicrobialx composite Layer and coating method thereof - Google Patents

Abstract

The present invention relates to a coating structure of a product with an antimicrobial composite layer and a coating method thereof capable of easily coating the antimicrobial composite layer on the product; improve work efficiency and productivity, and enhance anti-fingerprinting properties and antibiosis by coating the antimicrobial composite layer wherein antimicrobial materials and silica dioxide are mixed on the product in a sputtering method. To achieve the same, the coating structure is composed of the antimicrobial composite layer coated while in a state where the antimicrobial materials and silica dioxide are mixed on a surface of the product in the sputtering method, and an anti-fingerprinting coating layer coated on a surface of the antimicrobial composite layer. In addition, the coating method of the coating structure comprises: a step of mounting the product on a jig; a step of inputting the jig into a vacuum chamber with cathodic electrodes wherein an antimicrobial materials and silicon are mounted separately on a predetermined distance; a step of creating a vacuum inside the vacuum chamber; a step of inputting argon gas and a reactive gas into the vacuum chamber; a step of applying voltages to each cathodic electrode wherein the antimicrobial materials and silicon are inputted; a step of forming the antimicrobial materials and silica oxide by sputtering atoms of silicon and the antimicrobial materials using the argon gas, and combining the sputtered antimicrobial materials and atoms of silicon with the reactive gas; a step of forming the antimicrobial composite layer by coating the antimicrobial materials and the atoms of silicon while those are mixed on a surface of the product; a step of forming the anti-fingerprint coating layer on a surface of the antimicrobial composite layer; and a step of taking out the jig wherein the product with the antimicrobial composite layer and the anti-fingerprint coating layer is mounted out of the vacuum chamber.

Description

TECHNICAL FIELD [0001] The present invention relates to a coating structure of an antimicrobial composite layer,

The present invention relates to a method for coating an antimicrobial composite layer comprising a mixture of an antimicrobial material and silicon dioxide on a product to be coated, by sputtering, thereby easily coating the antimicrobial composite layer on the product, And an antimicrobial composite layer for improving the antibacterial and antimicrobial properties of the product, and a coating method thereof.

Generally, when a product such as a mobile phone or a notebook equipped with a touch panel for use by touching the screen, a tablet PC, a kiosk, etc., or a medical product or a bus handle having many people's body contact is used, When a user's body such as a user's hand or a face is brought into contact with the body, foreign matter such as fingers, oil, cosmetics or the like on the body is adhered or a marker such as fingerprint is left on the product.

The surface of the product may become dirty due to the adhering foreign matter or remaining marks on the product. In addition, the foreign matter adhering to the product may cause damage to various kinds of pathogens (bacteria) such as Escherichia coli or Staphylococcus aureus It is possible to cause skin troubles and various diseases caused by the above-mentioned bacteria when the skin comes into contact with the product.

As an anti-glare coating method in which fine irregularities are formed on the surface of the product to obtain a fingerprint preventing effect, a finger (IF) Fingerprint) coating method, spraying and depositing a spray for improving the washing property and slip feeling, and an AF (Anti-Fingerprint) coating method. The above coating methods are effective for the purpose of the present invention. However, It is impossible to prevent the contamination of the product by the product and the generation and propagation of bacteria in the product.

In order to prevent this, a multi-coating having an interlaminar antibacterial layer is interposed in the domestic public utility model No. 20-2013-0006648, and the multi-coating having the above-mentioned interlaminar antibacterial layer can be applied to an e-beam E-Beam) type multilayer structure, that is, a multi-coating layer in which a high refractive index material layer and a low refractive index material layer are alternately repeated so as to increase the light transmittance by decreasing the light reflectance, and a multi- And an antibacterial layer formed on the upper surface of the base layer to inhibit bacterial growth and a protective layer laminated on the antibacterial layer to improve the durability of the antibacterial layer .

However, such a conventional antimicrobial coating has a multi-coating layer in which a plurality of layers, that is, a high refractive index material layer and a low refractive index layer alternate with each other and a plurality of layers are repeatedly formed on the surface of the product, The antibacterial layer and the protective layer must be coated through a plurality of operations. As a result, there is a problem in that work efficiency and productivity are deteriorated as well as difficulty in work due to an increase in the number of coating operations of the product.

Domestic Public Utility Model Publication No. 20-2013-0006648 (2013.11.20.)

Disclosure of Invention Technical Problem [8] The present invention has been proposed in order to solve the problems in the prior art as described above, and it is an object of the present invention to provide a coating object, By coating the antimicrobial composite layer formed by mixing the mixed antimicrobial oxide and silicon dioxide (SiO ₂ ) by a sputtering method, the coating operation of the antimicrobial composite layer is facilitated to improve work efficiency and productivity And the object of the present invention is to improve the antistatic property and antibacterial property of the product.

According to an aspect of the present invention, there is provided an antimicrobial composite layer in which a surface of a product is coated with a mixture of an oxidizing antimicrobial substance formed in a plasma form by a sputtering method and silicon dioxide, An antimicrobial composite layer coated alternately with the material and silicon dioxide; And a coating layer formed on the surface of the antimicrobial composite layer to provide a coated structure of the antimicrobial composite layer.

Further, the present invention provides a method of manufacturing a fixture, comprising: mounting a product to be coated on a fixture; A negative electrode equipped with an antimicrobial substance including a mixture of two or more of them or a mixture of two or more of them is made of any one of zinc, copper, tin, platinum, barium, magnesium, germanium and calcium, Charging the fixture mounted with the product into the installed vacuum chamber spaced apart by a predetermined distance to perform revolution and rotation; Setting sputtering conditions and forming a vacuum state inside the vacuum chamber; Introducing an argon gas and a reactive gas into the vacuum chamber; Applying a voltage to each of the cathode electrodes on which the antibacterial substance and silicon are respectively mounted; The atoms of the antimicrobial substance and silicon are sputtered by the argon gas, and the antimicrobial substance and the silicon dioxide are coated on the surface of the product several times while the antimicrobial substance and the silicon dioxide are coated on the surface of the product several times, ; Coating the antimicrobial composite layer on the antimicrobial composite layer using a heat resistance heating method to form a antimicrobial coating layer; Withdrawing a fixture equipped with the antimicrobial compound layer and the coated product layer on the outside of the vacuum chamber; Water repellency performance test by measuring the angle of the water drop and the interface (the angle between the surface of water and the product surface at the interface between the water drop and the surface of the product) on the product coated with antimicrobial composite layer on the surface using a contact angle meter The method of coating a product comprising the antimicrobial composite layer is provided. The method may further include a step of plasma etching the surface of the product by introducing argon gas into the vacuum chamber before sputtering the antimicrobial material and silicon on the product.

According to the present invention as described above, it is possible to use a sputtering method in a vacuum chamber to apply any one or two or more of silver, zinc, copper, tin, platinum, barium, magnesium, germanium, Wherein the antimicrobial compound layer is formed of an oxide of an antibacterial substance mixed with silicon dioxide and silicon dioxide (SiO ₂ ) to form an antimicrobial composite layer by alternately coating an antimicrobial substance and silicon dioxide on the surface of the product, By coating the antimicrobial composite layer and the antimicrobial coating layer in a solid state on the product in a single operation in the vacuum chamber by using a thermal resistance heating method to form the antimicrobial coating layer so that the coating operation is very easy and easy , The working efficiency and the productivity according to the coating operation are improved.

In addition, since fingerprints or markings are not left on the surface of the product during the use of the product by the coated layer or the coated layer of the product, the product can be maintained in a clean condition at all times, The antimicrobial composite layer coated on the product prevents the adhesion of foreign matter to the surface of the product and prevents the generation and propagation of various pathogenic bacteria (bacteria), thereby improving antimicrobial properties such that skin troubles and various diseases are prevented from occurring There is also an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view schematically showing a structure in which an antimicrobial composite layer and an antistatic coating layer are coated on the product of the present invention. FIG.
2 is a structural view showing the internal structure of a vacuum chamber for coating an antibacterial composite layer on the product of the present invention.
FIG. 3 is an installation view showing a state in which a jig equipped with a product is installed in a vacuum chamber of the present invention. FIG.
4 is a plan view schematically showing a state in which an antibacterial composite layer is coated on a product of the present invention by a sputtering method.
5 is a block diagram showing a method of coating an antimicrobial composite layer and an antistatic coating layer on the product of the present invention.

Hereinafter, the coating structure and coating method of a product provided with the antibacterial composite layer according to the present invention will be described in more detail with reference to FIGS. 1 to 5.

In the present invention, atoms of an antimicrobial substance and silicon (Si) are sputtered on a surface of a product (10) as a coating object by a sputtering method using an argon gas, The antimicrobial composite layer 20 is formed of silicon (SiO ₂ ) and the antimicrobial material is alternately coated with silicon dioxide.

The antimicrobial compound layer 20 is protected on the surface of the antibacterial composite layer 20 and the surface of the product 10 is protected with a heat resistance heating method so as to prevent contamination by foreign substances and to prevent fingerprints, Coating layer 30 is formed by coating the coating liquid. The anti-smudge coating layer 30 is formed of a fluorine-based or silicone-based anti-fouling coating layer.

The antimicrobial material of the antimicrobial composite layer 20 may be at least one selected from the group consisting of Ag, Zn, Cu, Sn, Pt, Ba, Mg, , And calcium (Ca), or a mixture of two or more thereof.

The thickness of the antimicrobial compound layer 20 is 80 to 300 angstroms. When the thickness of the antimicrobial compound layer 20 is less than 80 angstroms, there is a problem that the antimicrobial compound layer 20 has an unstable function. 20) is formed to have a thickness of 300 ANGSTROM or more, the antimicrobial properties are excellent, but the visible light transmittance is decreased, which is not suitable for a display device of a mobile device, and the durability of the final formed membrane itself is deteriorated.

The surface of the product 10 is provided with a vacuum chamber 40 for coating the antimicrobial compound layer 20 while alternating between oxidized antimicrobial substance and silicon dioxide in the form of plasma, Can be formed into various shapes according to the purpose, effect, condition, or requirements of the purchaser, such as circular, elliptical, polygonal (triangular, square, hexagonal, octagonal, etc.)

The vacuum chamber 40 has a vacuum evacuation function and a gas valve 41 for introducing argon gas and reactive gas is formed.

One or a plurality of products 10 for forming the antimicrobial compound layer 20 and the antimicrobial coating layer 30 are mounted and the product 10 is inserted and removed into the vacuum chamber 40 in a state where the product 10 is mounted A jig 60 is provided.

A structure for fixing the fixture 60 in which the product 10 is mounted is formed in the vacuum chamber 40. An antibacterial substance is installed inside the vacuum chamber 40, a first cathode electrode 70 mounted on the first anode electrode 70 in a target manner and spaced a predetermined distance from the first anode electrode 70. Silicon is mounted in the vacuum chamber 40, a second cathode electrode 80 mounted in a target manner is provided.

The inside of the vacuum chamber 40 is provided with an inner fingerprint coating apparatus 90 provided with a plurality of coating liquid passages 91 having a coating liquid on the surface of the antibacterial composite layer 20 by a thermal resistance heating method.

The first and second cathode electrodes 70 and 80 are provided on the inner peripheral surface of the vacuum chamber 40. The inner fingerprint coating apparatus 90 is installed at a central portion of the vacuum chamber 40, The first and second cathode electrodes 70 and 80 and the inner fingerprint coating apparatus 90 can be installed in the vacuum chamber 40 in various manners, including the structure as described above.

The fixture 60 on which the product 10 is mounted is formed of a positive electrode having a positive polarity and the first and second negative polarity electrodes 70 and 80 are formed to have a negative polarity have. As shown in Figs. 2 and 3, the jig 60 is mounted on a rotation shaft fixed on the idle table, so that when the idle table rotates, it revolves and rotates on the rotation axis and rotates. Accordingly, the product 10 mounted thereon also revolves and rotates in the vacuum chamber 40.

The sputtering time of the antimicrobial material and silicon is about 4 to 5 minutes in the vacuum chamber 40 in which the antimicrobial composite layer 20 can be uniformly coated on the surface of the product 10 with a predetermined thickness, It is impossible to obtain the antimicrobial composite layer 20 having a certain thickness. If the sputtering time is set to 5 minutes or more, the entire thickness including the antimicrobial composite layer 20 becomes thick and the working time is increased The working efficiency is lowered.

The ratio of the oxidized antimicrobial material and silicon dioxide formed by the sputtering is 50: 50 wt%. When the composition ratio is set, the antimicrobial performance, the film durability, and the processing time are taken into consideration. When the weight of the antibacterial composite layer 20 is decreased or the thickness of the antibacterial composite layer 20 is decreased, the antibacterial performance is determined depending on the thickness of the final antibacterial composite layer. However, When the ratio is increased, the durability may be lowered.

The present invention configured as described above is characterized in that one or a plurality of products 10 to be coated are mounted on a fixture 60 and air is sprayed onto the surface of the product 10 mounted on the fixture 60, And ionized air is blown onto the surface of the product 10 to remove dust and static electricity on the surface of the product 10. [

At this time, the product 10 can be mounted on the jig 60 by using a double-faced tape and a fixing jig. In the mounting method, the product 10 is firmly mounted on the jig 60 The product 10 may be coated with a material to be coated, which will be described later, in 3D or 3D according to the jig 60 and the mounting method.

The jig 60 on which the product 10 from which dust and static electricity are removed is mounted on the surface of the vacuum chamber 40 as shown in FIG. 3, that is, the door 50 Is opened to open the inside of the vacuum chamber 40 and then the jig 60 to which the product 10 is mounted is charged into the opened vacuum chamber 40 to be fixed.

A first cathode electrode 70, in which an antimicrobial material is mounted in a targeted manner to form an antimicrobial composite layer 20 on the surface of the product 10 in the vacuum chamber 40, After setting the second cathode electrode 80 in accordance with the sputtering conditions, the door 50 is rotated toward the vacuum chamber 40 to close the vacuum chamber 40 to form a vacuum state inside the vacuum chamber 40 .

The first and second cathode electrodes 70 and 80 may be installed in the vacuum chamber 40 before the fixture 60 on which the product 10 to be coated is mounted is installed and fixed. So that it can be carried out in various ways depending on the purpose, effect and condition of the work or the work method of the worker.

The first and second cathode electrodes 70 and 80 are formed in a structure capable of being fixedly installed or detachably installed in the vacuum chamber 40. The vacuum chamber 40 is provided with a gate coating layer 30 An inner fingerprint coating apparatus 90 provided with a coating liquid container 91 containing a plurality of coating liquids is provided.

In this state, argon (Ar) gas and reactive gas ionized into the vacuum chamber 40 are introduced through the gas valve 41 formed in the door 50 or the vacuum chamber 40, And oxygen or nitrogen for forming an oxide film for selectively adhering or coating the antimicrobial material and silicon dioxide on the surface of the product 10 by alternately sputtering the silicon and the antimicrobial material to be described later , And it is more preferable to use double oxygen.

The amount of the argon gas is minimized, and the sputtering rate and the amount of the argon gas are adjusted so that the sputtering work of the antimicrobial material and silicon to be described later is smoothly performed. If the amount of the argon gas is 30 sccm or more, the sterilizing rate is increased and the thickness of the antibacterial composite layer 20 is difficult to control. Thus, a uniform film can not be obtained and durability is lowered there is a problem.

The argon gas injected into the vacuum chamber 40 according to the process step before sputtering the antimicrobial material and silicon into the product 10 is subjected to plasma etching treatment on the surface of the product 10, The organic antimicrobial material formed by bonding with the reactive gas while being sputtered on the surface of the product 10 is coated with the silicon dioxide alternately so that the adhesion of the antibacterial composite layer 20 .

When the vacuum proper pressure in the vacuum chamber 40 into which the argon gas and the reactive gas are introduced reaches the voltage (negative electrode), the first and second cathode electrodes 70 and 80, .

Then, the charged ionized argon gas (Ar) is accelerated toward the first and second cathode electrodes (70, 80), and the antimicrobial material and silicon are sputtered by the ionized argon gas, And reacted with the reactive gas ions to be converted into oxidized antimicrobial material and silicon dioxide (SiO ₂ ) to form an oxide film.

That is, the sputtered antimicrobial material and silicon are reacted with the anion of oxygen, which is the reactive gas, to form an oxide while the oxide moves to the side of the jig 60, The antimicrobial composite layer 20 coated with the oxidized antimicrobial material and the silicon dioxide alternately is formed.

Since the antimicrobial composite layer 20 coated with the oxidizing antimicrobial material and the silicon dioxide alternately has a lower refractive index than that of the antibacterial layer coated with only the antimicrobial material formed in the prior art, Not only is it suitable for instrument display panels, it also improves the durability of the final film itself.

After the antimicrobial composite layer 20 is coated on the surface of the product 10, the antimicrobial composite layer 20 is coated with the antimicrobial coating layer 30 using a thermal resistance heating method. .

That is, the coating liquid contained in the plurality of coating liquid containers 91 provided in the inner fingerprint coating apparatus 90 installed in the vacuum chamber 40 is discharged to the outside of the coating liquid bottle 91 by a heat resistance heating method, (I.e., coated on the surface of the layer 20).

When the antimicrobial compound layer 20 and the emulsion coating layer 30 are formed on the product 10 in the vacuum chamber 40, the door 50 is rotated to open the inside of the vacuum chamber 4, The jig 60 on which the product 10 on which the antimicrobial compound layer 20 and the antimicrobial coating layer 30 are formed is drawn from the inside of the vacuum chamber 40 to the outside of the vacuum chamber 40.

The antimicrobial composite layer 20 and the antimicrobial coating layer 30 are then tested using a contact angle meter to test the water repellency performance of the antimicrobial compound layer 20 and the antimicrobial coating layer 30 coated on the product 10. [ After dropping the water on the surface of the coated product 10, an angle formed between the dropped water droplet and the interface (the angle between the water droplet surface and the product surface at the interface between the water droplet and the product surface) is measured, The water repellency performance of the water repellent coating layer 20 and the water repellent coating layer 30 is tested.

Abrasion test E-Beam Sputter Contact angle Antibacterial activity Contact angle Antibacterial activity Early 114 99.9 / 99.9 115 99.9 / 99.9 3000 times 109 99.9 / 99.9 114 99.9 / 99.9 5000 times 65 87.6 / 83.4 112 99.9 / 99.9 10000 times 59 76.5 / 74.2 98 99.9 / 99.9`

As shown above, [Table 1] is a comparison of the contact angle and the antibacterial activity in the conventional E-Beam system and the sputter system of the present invention. , The contact angle and the antibacterial activity are improved.

Abrasion test Antimicrobial material (5 minutes) Antimicrobial material + silicon dioxide (5 minutes) Contact angle Antimicrobial activity Contact angle Antimicrobial activity Early 57 99.9 / 99.9 58 99.9 / 99.9 3000 times 49 87.5 / 65.2 51 99.9 / 99.9 5000 times 32 76.1 / 80.4 49 99.9 / 99.9

As can be seen from the above, [Table 2] compares the abrasion resistance of a coating layer coated only with an antimicrobial substance and an antimicrobial composite layer in which the antimicrobial substance and silicon dioxide are mixed and coated. In this sputtering method, It can be seen that the abrasion resistance is better in the mixed antibacterial composite layer.

Abrasion test SiO ₂ (4kw) + antimicrobial material (3kw) -AF Sio2 (4kw) + Antimicrobial material (4kw) -AF Contact angle Antibacterial activity Contact angle Antibacterial activity Early 113 99.9 / 99.9 114 99.9 / 99.9 3000 times 100 99.9 / 99.9 96 99.9 / 99.9

kw: Sputtering power, higher coating.

As can be seen from the above, [Table 3] compares the contact angle and the antibacterial property according to the blending ratio between the antibacterial substance and the silicon dioxide, and the contact angle and the antibacterial activity of the antibacterial compound layer are almost the same due to the combination of the antibacterial substance and silicon dioxide. It can be understood that the compounding ratio between the antimicrobial substance and silicon dioxide should be appropriately adjusted in order to form a thin film having antibacterial and durability.

Abrasion test Antimicrobial material + SiO ₂
(1 minute) Antimicrobial material + SiO ₂
(3 minutes) Antimicrobial material + SiO ₂
(5 minutes) Antimicrobial material + SiO ₂
(7 minutes) Contact angle Antibacterial activity Contact angle Antibacterial activity Contact angle Antibacterial activity Contact angle Antibacterial activity Early 114 99.9 / 99.9 114 99.9 / 99.9 114 99.9 / 99.9 115 99.9 / 99.9 10000 times 101 87.5 / 92.6 97 99.9 / 99.9 98 99.9 / 99.9 70 99.9 / 99.9

As can be seen from the above, [Table 4] compares the thickness of the antimicrobial composite layer with the abrasion resistance. When the thickness of the antimicrobial composite layer is thin, the antimicrobial effect decreases. When the thickness of the antimicrobial composite layer is large, In the case of the present invention.

Abrasion test Ar / O ₂ : 50/450 Ar / O ₂ : 20/480 Contact angle Antibacterial activity Contact angle Antibacterial activity Early 113 99.9 / 99.9 113 99.9 / 99.9 3000 times 100 99.9 / 99.9 105 99.9 / 99.9

As can be seen from the above, [Table 5] compares the contact angle and antimicrobiality according to the difference in partial pressure of argon gas (Ar) and oxygen (O ₂ ) (working time 5 min, Power antibacterial, SiO ₂ angle 4 kw) It can be seen that when the amount of gas (Ar) is more than 20 sccm than 50 sccm, the wear resistance of the antimicrobial composite layer is increased.

Therefore, when a composite layer of an antimicrobial substance (power: 3 kw) and silicon dioxide (power: 4 kw) is coated by sputtering at a ratio of Ar: O ₂ = 20: 480 for about 4 to 5 minutes, The antibacterial composite layer 20 can be coated.

As described above, the coating structure and the coating method of the product provided with the antimicrobial composite layer according to the present invention have been described with reference to the drawings. However, the present invention is not limited to the embodiments and drawings described in the present specification, Various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

10: Product 20: Antimicrobial compound layer
30: Mooney coating layer 40: Vacuum chamber
41: gas valve 50: door
60: jig 70, 80: first and second cathode electrodes
90: inner fingerprint coating device 91: coating liquid container

Claims (4)

Mounting a product to be coated on the jig;
A negative electrode equipped with an antimicrobial substance including a mixture of two or more of them or a mixture of two or more of them is made of any one of zinc, copper, tin, platinum, barium, magnesium, germanium and calcium, Charging the fixture mounted with the product into the installed vacuum chamber spaced apart by a predetermined distance to perform revolution and rotation;
Setting sputtering conditions and forming a vacuum state inside the vacuum chamber;
Introducing an argon gas and a reactive gas into the vacuum chamber;
Applying a voltage to each of the cathode electrodes on which the antimicrobial material and silicon are respectively mounted, the coating method comprising the steps of:
The atoms of the antimicrobial substance and silicon are sputtered by the argon gas, and the antimicrobial substance and the silicon dioxide are coated on the surface of the product several times while the antimicrobial substance and the silicon dioxide are coated on the surface of the product several times, ;
Coating the antimicrobial composite layer on the antimicrobial composite layer using a heat resistance heating method to form a antimicrobial coating layer;
Withdrawing a fixture equipped with the antimicrobial compound layer and the coated product layer on the outside of the vacuum chamber;
Water repellency performance test by measuring the angle of water drop and interface (the angle between the surface of water and the product surface at the interface between water droplet and product surface) dropped on product coated with antimicrobial composite layer on the surface using a contact angle meter Wherein the antimicrobial composite layer is coated with the antimicrobial composite layer. The method according to claim 1,
Wherein an argon gas of 5 to 30 sccm and oxygen or nitrogen are introduced as the reactive gas into the vacuum chamber, and the thickness of the antibacterial complex layer is 80 to 300 Å. The method according to claim 1,
Coating a composite layer of the oxidized antimicrobial material and silicon dioxide with a sputtering method for 4 to 5 minutes at a ratio of Ar: O ₂ = 20: 480 to form an antimicrobial composite layer Lt; / RTI > Wherein the anode and the cathode are disposed at a predetermined distance from each other so that the oxidizing antimicrobial substance and the silicon dioxide are adhered to the surface of the product several times by reacting with oxygen, An antimicrobial composite layer formed according to any one of claims 1 to 3,
Wherein the antimicrobial composite layer is coated on the surface of the antimicrobial composite layer, and the antimicrobial composite layer comprises a single operation in the vacuum chamber.

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