KR102380140B1 - Coating device and coating method using same - Google Patents

Abstract

The embodiment relates to a coating apparatus for coating a base film moving vertically and up and down and to a coating method using the same, and by including a first coating roller and a second coating roller positioned opposite to each other at regular intervals, coating performance can be improved there is.

Description

Coating device and coating method using same {COATING DEVICE AND COATING METHOD USING SAME}

The embodiment relates to a coating apparatus capable of improving coating performance and a coating method using the same by including a first coating roller and a second coating roller positioned opposite to each other at regular intervals.

A coating device is a device that forms a thin film made of metal or resin on the surface of an object to be coated. As a post-treatment of the plating process, a resin is coated on the surface of a steel sheet, or an antistatic layer, an adhesive layer, etc. are formed on one or both sides of the film or It is used in various fields such as bonding a film using a coating solution without using an additional bonding material.

Conventionally, a coating device having a horizontal structure in which a coating object moves horizontally is used, and since such a horizontal coating device is structurally affected by gravity and load, there is a limit in realizing a uniform coating thickness. In particular, when a high-viscosity coating solution is used, the thickness of the coating layer formed on the horizontally moving coating object is difficult to be uniform, and air bubbles are easily generated in the coating layer, thereby deteriorating the quality.

As an example, Korean Patent Application Laid-Open No. 2013-0071305 discloses a double-sided coating apparatus equipped with a coating roller that moves horizontally and changes the direction of the film, but it is difficult to achieve uniform thickness of the coating under the influence of gravity and load. , It is easy to generate bubbles when using a high-viscosity coating solution.

Republic of Korea Patent Publication No. 2013-0071305

Accordingly, embodiments are to provide a coating apparatus capable of improving coating performance through a simple process and a coating method using the same.

A coating apparatus according to an embodiment includes a transfer unit for vertically transferring a base film; a supply unit for supplying a coating material; a coating unit including a first coating roller and a second coating roller positioned to face each other at regular intervals; and a winding unit for providing and winding the carrier film.

A coating method according to an embodiment comprises the steps of vertically transporting a base film; providing a carrier film to the first coating roller and the second coating roller positioned to face each other at a predetermined interval; supplying a coating raw material to at least one surface of the base film; and pressing the base film to which the coating raw material is supplied with the first coating roller and the second coating roller.

The coating film according to one embodiment may be prepared by the above coating method.

The coating apparatus according to the embodiment may improve the uniformity of the coating thickness since it is possible to minimize the influence of gravity and load by transporting the base film vertically up and down.

In addition, by adjusting the distance between the first coating roller and the second coating roller, it is possible to easily form a coating layer having various thicknesses as needed.

Moreover, since the coating layer can be simultaneously formed on both surfaces of a plurality of substrates without an additional process, there is an effect of saving time and cost.

1 shows a coating apparatus according to an embodiment.
2 shows a coating apparatus according to another embodiment.
3 shows a first coating roller and a second coating roller according to an embodiment.

Hereinafter, the invention will be described in detail through embodiments. The embodiments are not limited to the contents disclosed below and may be modified in various forms as long as the gist of the invention is not changed.

In the present specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, it should be understood that all numbers and expressions indicating amounts of components, reaction conditions, etc. described herein are modified by the term "about" in all cases unless otherwise specified.

In this specification, terms such as first, second, etc. are used to describe various components, and the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

coating device

Conventionally, a coating device having a horizontal structure that horizontally moves a coating object is used, and since such a horizontal coating device is structurally affected by gravity and load, there is a limit in realizing a uniform coating thickness. In particular, when a high-viscosity coating raw material is used, it is difficult to have a uniform thickness of the coating layer formed on at least one surface of the object to be coated, and bubbles are easily generated in the coating layer, thereby reducing the quality.

However, the coating apparatus according to the embodiment can improve the uniformity of the coating thickness because the effect of gravity and load can be minimized by vertically transporting the base film. In particular, even when a high-viscosity coating raw material is used, the bubble generation rate can be reduced, so that the quality can be improved.

In addition, the conventional horizontal coating device applies and cures a coating raw material on one surface of a coating object that is horizontally transported to perform double-sided coating, and then applies and cures a coating raw material on the other surface of the coating object, so that the process time this was long Alternatively, when a coating material is applied and cured on both upper and lower surfaces of a horizontally transported object to be coated on both sides, the lower surface of the object to be coated is affected by gravity and load, so it was difficult to obtain the same coating thickness on both upper and lower surfaces.

However, the coating apparatus according to the embodiment can supply the coating raw material to both surfaces of the base film simultaneously while transporting the base film vertically and vertically, and by including a first coating roller and a second coating roller positioned opposite to each other at regular intervals. , double-sided coating can be performed with a simple process while minimizing the effects of gravity and load.

A coating apparatus according to an embodiment includes a transfer unit for vertically transferring a base film; a supply unit for supplying a coating material; a coating unit including a first coating roller and a second coating roller positioned to face each other at regular intervals; and a winding unit for supplying and winding the carrier film.

1 shows a coating apparatus according to an embodiment. 1 shows a transfer unit 100 for vertically transporting a first base film 101, which is a coating object, a supply unit 200 for supplying a coating material to the first base film 101, and an unwinding providing a carrier film. A winding unit 300 including unwinding rollers 301 and 302 and rewinding rollers 303 and 304 for winding a carrier film, a first coating roller 401 positioned opposite to each other at regular intervals, and The coating part 400 including the second coating roller 402, the gap adjusting part 500 for adjusting the gap between the first coating roller 401 and the second coating roller 402, and the coating raw material A coating apparatus including a pre-drying unit 600 for pre-drying is illustrated.

2 shows a coating apparatus according to another embodiment. Specifically, in FIG. 2, a transfer unit 100 for vertically transporting a first base film 101 and a second base film 102 as a coating object, respectively, is coated on the two kinds of base films 101 and 102, respectively. The winding unit 300 including the supply unit 200 for supplying raw materials, the unwinding rollers 301 and 302 for providing a carrier film, and the rewinding rollers 303 and 304 for winding the carrier film; The first coating roller 401 and the second coating roller 402 positioned toward the coating portion 400, the first coating roller 401 and the second coating roller 402, the gap adjusting the gap A coating apparatus including a control unit 500 and a pre-drying unit 600 for pre-drying the coating raw material is exemplified.

The coating apparatus according to the embodiment includes a transfer unit 100 for vertically transferring the base films 101 and 102 up and down. Specifically, the transfer unit 100 transfers the base films 101 and 102 as the coating object vertically and vertically. More specifically, the transfer unit 100 transports the base films 101 and 102 to vertically descend, thereby minimizing the influence of gravity and load that may affect the coating raw material supplied by the supply unit 200 in the subsequent process. Therefore, it is possible to improve the uniformity of the coating thickness.

The base films 101 and 102 may be a film or a textile fabric, but any object for forming a coating layer using a coating raw material is applicable, so it is not limited thereto.

In addition, the transfer unit 100 may transfer one or two or more types of base films as needed. For example, as shown in FIG. 1 , the first base film 101 may be transported, and as shown in FIG. 2 , the first base film 101 and the second base film 102 may be transported, respectively. can

When the transfer unit 100 transfers two or more kinds of base films, specifically, when transferring the first base film 101 and the second base film 102 as shown in FIG. 2 , the first base film ( 101) and the gap between the second base film 102 may be 0.5 mm to 2 mm. For example, the distance between the first base film 101 and the second base film 102 is 0.5 mm to 1.8 mm, 0.5 mm to 1.5 mm, 0.8 mm to 2 mm, 0.5 mm to 0.8 mm, 0.8 mm to 1.5 mm or 1.5 mm to 2 mm. When the distance between the first base film 101 and the second base film 102 satisfies the above range, the uniformity of the coating thickness can be improved even when coating raw materials of various viscosities, particularly, coating raw materials of high viscosity are used. can

The coating apparatus according to the embodiment includes a supply unit 200 for supplying a coating raw material. Specifically, the supply unit 200 supplies a coating raw material for forming a coating layer on the substrate. More specifically, the supply unit 200 may supply the raw material through one or two or more types of supply pipes. For example, as shown in FIG. 1 , the supply unit 200 includes a first supply pipe 201 and a second supply pipe 202 , or as shown in FIG. 2 , a first supply pipe 201 and a second supply pipe 201 . It may include a supply pipe 202 and a third supply pipe 203 . Each of the coating raw materials supplied to the first supply pipe 201 to the third supply pipe 203 may be the same or different.

The coating device according to the embodiment includes a winding unit 300 for providing and winding a carrier film. Specifically, the winding unit 300 includes unwinding rollers 301 and 302 for providing a carrier film and rewinding rollers 303 and 304 for winding the carrier film. More specifically, the carrier film provided through the unwinding rollers 301 and 302 passes through the first coating roller 401 and the second coating roller 402 , and then is wound on the rewinding rollers 303 and 304 .

In addition, the winding unit 300 includes a first unwinding roller 301 and a second unwinding roller 302 positioned to face each other at a predetermined interval, and a first rewinding roller 303 to face each other at a predetermined interval. and a second rewinding roller 304 . Specifically, the first unwinding roller 301 and the first rewinding roller 303 may provide and wind up a carrier film on the first coating roller 401 , and the second unwinding roller 302 . and the second rewinding roller 304 may provide and wind the carrier film on the second coating roller 402 .

A distance between the first unwinding roller 301 and the second unwinding roller 302 may be 800 mm to 2,000 mm, and the first rewinding roller 303 and the second rewinding roller 304 ) may be between 800 mm and 2,000 mm. For example, the distance between the first unwinding roller 301 and the second unwinding roller 302 is 800 mm to 1800 mm, 800 mm to 1,500 mm, 1,000 mm to 2,000 mm, 1,000 mm to 1800 mm , 800 mm to 1,000 mm, 1,000 mm to 1,500 mm, or 1,500 mm to 2,000 mm, the distance between the first rewinding roller 303 and the second rewinding roller 304 is 800 mm to 1800 mm , 800 mm to 1,500 mm, 1,000 mm to 2,000 mm, 1,000 mm to 1800 mm, 800 mm to 1,000 mm, 1,000 mm to 1,500 mm, or 1,500 mm to 2,000 mm.

In addition, the interval between the first unwinding roller 301 and the second unwinding roller 302 and the interval between the first rewinding roller 303 and the second rewinding roller 304 are equal to each other. can Alternatively, the interval between the first unwinding roller 301 and the second unwinding roller 302 and the interval between the first rewinding roller 303 and the second rewinding roller 304 are different from each other. can do.

The carrier film may be a film having releasability. Specifically, the carrier film is in direct contact with the coating material, and after the first coating roller 401 and the second coating roller 402 are pressed, the first coating roller 401 and the second coating roller 402 It is possible to prevent contamination of the first coating roller 401 and the second coating roller 402 by the coating raw material, as well as the coating layer becoming non-uniform due to the coating material being smeared.

The carrier film is not limited as long as it is a film having releasability. For example, the carrier film may be a polymer film of polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PVC), polycarbonate (PC), polypropylene (PP), or a mixture thereof. However, the present invention is not limited thereto.

The coating apparatus according to the embodiment includes a coating unit 400 including a first coating roller 401 and a second coating roller 402 positioned to face each other at a predetermined interval. Specifically, the coating unit 400 presses the base films 101 and 102 to which the coating material is supplied. More specifically, the coating part 400 includes a first coating roller 401 and a second coating roller 402, and the first coating roller 401 and the second coating roller 402 are the conveying part. Positioned opposite to each other at a predetermined distance from the base films 101 and 102 that are vertically transferred up and down by 100, press the base films 101 and 102 to which the coating raw material is supplied.

The distance d1 or d2 between the first coating roller 401 and the second coating roller 402 may be 0.5 mm to 2 mm (see FIG. 3 ). Specifically, the distance (d1 or d2) between the outermost surfaces of the first coating roller 401 and the second coating roller 402 is 0.5 mm to 1.8 mm, 0.5 mm to 1.5 mm, 0.8 mm to 2 mm, 0.5 mm to 0.8 mm, 0.8 mm to 1.5 mm or 1.5 mm to 2 mm. When the interval between the first coating roller 401 and the second coating roller 402 satisfies the above range, it is possible to improve the uniformity of the coating thickness even when using coating materials of various viscosities, especially high-viscosity coating materials. there is.

In addition, the coating apparatus according to the embodiment may further include a gap adjusting unit 500 for adjusting the gap between the first coating roller 401 and the second coating roller 402 .

3 shows a first coating roller 401 and a second coating roller 402 according to an embodiment. Specifically, FIG. 3 illustrates an interval adjusting unit 500 for adjusting the interval d1 or d2 between the first coating roller 401 and the second coating roller 402 . As shown in FIG. 3 , the gap adjusting unit 500 adjusts the gap between the first coating roller 401 and the second coating roller 402 with a first controller 501 and a second controller 502 . It can be adjusted to d1 or d2 as needed.

The first coating roller 401 and the second coating roller 402 may each be made of a metal material. For example, the first coating roller 401 and the second coating roller 402 may be the same as each other, and each may be made of stainless steel or chromium, but is not limited thereto.

A diameter d3 of the first coating roller 401 and the second coating roller 402 may be 300 mm to 700 mm (see FIG. 3 ). For example, the diameter d3 of the first coating roller 401 and the second coating roller 402 is 400 mm to 700 mm, 300 mm to 500 mm, 400 mm to 700 mm, 300 mm to 400, respectively. mm, 400 mm to 500 mm or 500 mm to 700 mm.

The coating apparatus according to the embodiment may further include a preliminary drying unit 600 for drying the coating raw material. Specifically, since the coating apparatus further includes a preliminary drying unit 600 for drying the coating raw material, gelation of the coating raw material can be rapidly performed, and thus the uniformity of the coating thickness can be further improved.

The preliminary drying unit 600 may use warm air or hot air or an electric coil, but is not limited thereto.

In addition, the coating apparatus according to another embodiment may further include a curing unit for curing the coating raw material. Specifically, the coating apparatus further includes a curing unit for curing the coating raw material, so that the raw material can be gelated quickly, thereby further improving the uniformity of the coating thickness.

The curing unit may use UV curing or thermal curing, but is not limited thereto.

In addition, the coating apparatus according to another embodiment may include both the drying unit 600 and the curing unit, and the drying and curing may be simultaneously performed.

coating method

A coating method according to an embodiment comprises the steps of vertically transporting a base film; providing a carrier film to the first coating roller and the second coating roller positioned to face each other at a predetermined interval; supplying a coating raw material to at least one surface of the base film; and pressing the base film to which the coating raw material is supplied with the first coating roller and the second coating roller.

First, the coating method according to the embodiment includes the step of vertically transporting the base films 101 and 102 . Specifically, in the transferring step, one or two or more types of base films are vertically and vertically transferred. More specifically, as shown in FIG. 1 , the transferring step may transport the first base film 101 up and down vertically, and as shown in FIG. 2 , the transferring step includes the first base film 101 and The second base film 102 may be vertically transported up and down, respectively.

In the transporting step, by vertically transporting the base films 101 and 102, the influence of gravity and load that may affect the coating raw material supplied in the subsequent process can be minimized, so that the uniformity of the coating thickness can be improved. can

In the transporting step, the base films 101 and 102 may be transported at a speed of 0.5 m/min to 20 m/min. For example, the transport speed of the transport step is 0.5 m/min to 10 m/min, 0.5 m/min to 15 m/min, 1 m/min to 20 m/min, 0.5 m/min to 1 m/min , 0.5 m/min to 5 m/min, 1 m/min to 10 m/min, or 10 m/min to 20 m/min. When the feed rate satisfies the above range, it is possible to improve the uniformity of the coating thickness even when a coating material having various viscosities, particularly, a high viscosity coating material is used.

The description of the base films 101 and 102 is the same as described above.

Then, the coating method according to the embodiment includes the step of providing a carrier film to the first coating roller 401 and the second coating roller 402 located opposite to each other at regular intervals. Specifically, as shown in FIGS. 1 and 2 , the providing step includes providing a carrier film to the first coating roller 401 with a first unwinding roller 301 , and providing a carrier film with a second unwinding roller 302 . 2 A carrier film is provided on the coating roller 402 .

In addition, the speed of providing the carrier film may be the same as that of the base films 101 and 102 in the conveying step.

The description of the first coating roller 401, the second coating roller 402, and the carrier film is the same as described above.

Thereafter, the coating method according to the embodiment includes supplying a coating raw material to at least one surface of the base films 101 and 102 . Specifically, the step of supplying the coating raw material is performed before the pressing step, and the supplying step supplies the coating raw material between the base films 101 and 102 and the carrier film. In addition, the supply step is between the first base film 101 and the carrier film, between the second base film 102 and the carrier film, and between the first base film 101 and the second base film 102 . coating raw materials can be supplied to

More specifically, as shown in FIG. 1 , in the supplying step, a coating raw material is supplied between the carrier film provided by the first base film 101 and the first unwinding roller 301 to the first supply pipe 201 and , by supplying a coating raw material between the carrier film provided by the second base film 102 and the second unwinding roller 302 through the second supply pipe 202, two coating layers can be formed in a subsequent process. In addition, as shown in FIG. 2 , in the supplying step, a coating raw material is supplied between the carrier film provided by the first base film 101 and the first unwinding roller 301 to the first supply pipe 201, and the second A coating raw material is supplied between the second base film 102 and the carrier film provided by the second unwinding roller 302 through the second supply pipe 202, and the first base film 101 and the first substrate film 101 through the third supply pipe 203 By supplying a coating raw material between the second base film 102, three coating layers may be formed in a subsequent process.

In the supplying step, the same coating raw material may be supplied to the first supply pipe 201 to the third supply pipe 203 , or different coating raw materials may be supplied.

In the supplying of the coating raw material, the coating raw material may be supplied at a flow rate of 0.5 L/min to 5 L/min. For example, the feeding step may be 0.5 L/min to 3 L/min, 0.5 L/min to 2 L/min, 1 L/min to 5 L/min, 0.5 L/min to 1 L/min, 1 L The coating raw material may be supplied at a flow rate of /min to 2 L/min or 2 L/min to 5 L/min. The flow rate of the supply step may be adjusted according to the desired thickness of the coating layer and the viscosity of the coating raw material.

The viscosity of the coating raw material may be 50,000 cps to 1 million cps. For example, the viscosity of the coating raw material supplied in the supply step may be 50,000 cps to 800,000 cps, 50,000 cps to 500,000 cps, 50,000 cps to 300,000 cps, or 50,000 cps to 200,000 cps. When the viscosity of the coating raw material satisfies the above range, the uniformity of the coating thickness may be improved. Specifically, the coating method according to the embodiment can improve the uniformity of the coating thickness even when coating raw materials of various viscosities, particularly, high-viscosity coating raw materials are used.

In the supply step, the flow rate and viscosity of the coating raw material supplied to the first supply pipe 201 and the second supply pipe 202 or the first supply pipe 201 to the third supply pipe 203 may be the same or different.

Then, it includes the step of pressing the base film 101 and 102 to which the coating raw material is supplied with the first coating roller 401 and the second coating roller 402 . Specifically, the first coating roller 401 and the second coating roller 402 respectively press the coating raw material supplied in the supply step through the carrier film to form a coating layer.

In the pressing step, a pressure of 0.1 MPa to 1 MPa may be applied. For example, in the pressing step, the first coating roller 401 and the second coating roller 402 are each 0.1 MPa to 0.8 MPa, 0.1 MPa to 0.5 MPa, 0.3 MPa to 1 MPa, 0.1 MPa to 0.3 MPa , by applying a pressure of 0.3 MPa to 0.5 MPa or 0.5 MPa to 1 MPa. The pressure of the first coating roller 401 and the second coating roller 402 may be adjusted according to the desired thickness of the coating layer and the viscosity of the coating material.

In addition, the coating method according to the embodiment may further include adjusting a gap between the first coating roller and the second coating roller according to the coating thickness. Specifically, in the adjusting step, the first adjuster 501 and the second adjuster 502 can adjust the distance between the first coating roller and the second coating roller, so that a desired coating thickness can be obtained (FIG. 3). Reference).

The spacing adjusting step may be performed before the transferring step or before the carrier film providing step, but may be performed at any step if necessary.

Thereafter, the coating method according to the embodiment may include winding a carrier film from the first coating roller 401 and the second coating roller 402 . Specifically, as shown in FIGS. 1 and 2 , in the winding step, the carrier film may be wound from the first coating roller 401 with a first rewinding roller 303, and the second rewinding roller ( 304), the carrier film may be wound from the second coating roller 402 .

In addition, the winding speed of the carrier film may be the same as the feeding speed of the base films 101 and 102 in the conveying step.

The coating method according to the embodiment may further include the step of pre-drying the coated base films 101 and 102 after the pressing step.

Specifically, the preliminary drying step may be performed after the pressing step and the winding step as shown in FIG. 1 , and may be performed after the pressing step and before the winding step as shown in FIG. 2 . In the preliminary drying step, the first coating roller 401 and the second coating roller 402 pressurize the coating raw material to dry the base films 101 and 102 on which the coating layer is formed, so that the coating raw material can be gelled more quickly. Therefore, it is possible to further improve the uniformity of the coating thickness.

The preliminary drying step may be performed at 30 °C to 100 °C. For example, the drying temperature of the preliminary drying step may be 35 °C to 95 °C, 40 °C to 80 °C, 45 °C to 90 °C, 50 °C to 80 °C, or 55 °C to 95 °C.

In addition, the preliminary drying step may be performed by hot air or hot air, or may be performed by an electric coil, but is not limited thereto.

The coating method according to the embodiment may further include curing the coated base films 101 and 102 after the preliminary drying step. Specifically, after the preliminary drying step, the first coating roller 401 and the second coating roller 402 press the coating raw material to cure the base films 101 and 102 on which the coating layer is formed, thereby gelling the coating raw material. Since it can be done more quickly, the uniformity of the coating thickness can be further improved.

In addition, the curing step may be performed by thermal curing or infrared curing, but is not limited thereto.

The coating method according to another embodiment may perform the preliminary drying step and the curing step at the same time.

coating film

The coating film according to the embodiment may be prepared by the above coating method. Specifically, the coating film 700 in which a coating layer is formed on at least one surface of the base films 101 and 102 by the coating method may be manufactured.

More specifically, as shown in FIG. 1, a coating film having a first coating layer 701 and a second coating layer 702 formed by supplying a coating raw material to both sides of the first base film 101 by the coating method, respectively ( 700) can be obtained. Alternatively, as shown in FIG. 2 , the first coating layer 701 , the second coating layer 702 and the second coating layer 701 and the second coating layer 702 and 3 The coating film 700 on which the coating layer 703 is formed can be obtained.

The thickness of the coating layer formed on the coating film 700 may be 50 μm to 500 μm. For example, the thickness of the coating layer formed on the coating film is 55 μm to 450 μm, 60 μm to 430 μm, 70 μm to 400 μm, 80 μm to 380 μm, 100 μm to 350 μm, 100 μm to 300 μm, 130 μm to 250 μm or 150 μm to 250 μm.

In addition, when the coating film 700 includes a plurality of coating layers, the thicknesses of the plurality of coating layers may be the same as or different from each other. For example, as shown in FIG. 1, when a coating layer is formed on both sides using one type of base film 101, the thickness of the first coating layer 701 and the second coating layer 702 may be the same as each other, , may be different. In addition, as shown in FIG. 2 , when the coating layer is formed using two types of base films 101 and 102 , the thickness of the first coating layer 701 and the third coating layer 703 may be the same as each other, and the The thickness of the first coating layer 701 and the third coating layer 703 and the thickness of the second coating layer 702 may be different from each other.

The thickness deviation of the coating layer formed on the coating film 700 may be 1 μm to 10 μm. For example, the thickness deviation of the coating layer formed on the coating film 700 may be 1 μm to 8 μm, 3 μm to 10 μm, 3 μm to 5 μm, 1 μm to 5 μm, or 1 μm to 3 μm.

100: transfer unit
101: first base film
102: second base film
200: supply
201: first supply pipe
202: second supply pipe
203: third supply pipe
300: wind unit
301: first unwind roller
302: second unwind roller
303: first rewind roller
304: second rewind roller
400: coating part
401: first coating roller
402: second coating roller
500: gap control unit
501: first regulator
502: second regulator
600: preliminary drying unit
700: coating film
701: first coating layer
702: second coating layer
703: third coating layer

Claims (10)

a transfer unit for vertically transporting the first base film and the second base film, respectively;
a supply unit for supplying coating materials to the first base film and the second base film, respectively;
a coating unit including a first coating roller and a second coating roller positioned to face each other at a predetermined interval;
a winding unit for providing and winding a carrier film; and
and a pre-drying unit for pre-drying the coating raw material at 30°C to 100°C,
When the first coating roller and the second coating roller press the coating raw material through the carrier film, respectively, the pressure is 0.1 Mpa to 1 MPa,
The supply unit, a first supply pipe for supplying a coating raw material to one surface of the base film, a second supply pipe for supplying a coating raw material to one surface of the second base film, and between the first base film and the second base film A coating device comprising a third supply pipe for supplying a coating material to the. delete The method of claim 1,
The coating apparatus according to claim 1, wherein the winding section includes an unwinding roller for providing a carrier film and a rewinding roller for winding the carrier film. The method of claim 1,
A distance (d1 or d2) between the first coating roller and the second coating roller is 0.5 mm to 2 mm,
The first coating roller and the second coating roller have a diameter d3 of 300 mm to 700 mm, respectively. transporting the first base film and the second base film vertically and vertically, respectively;
providing a carrier film to a first coating roller and a second coating roller positioned opposite to each other at a predetermined distance;
supplying coating materials to the first base film and the second base film, respectively;
pressing the base film to which the coating raw material is supplied to 0.1 Mpa to 1 MPa, respectively, with the first coating roller and the second coating roller; and
Comprising the step of pre-drying the coated base film at 30 ℃ to 100 ℃,
The supplying of the coating raw material may include supplying a coating raw material to one surface of the first base film through a first supply pipe, supplying a coating raw material to one surface of the second base film through a second supply pipe, and A coating method comprising the step of supplying a coating raw material between the first base film and the second base film through a third supply pipe. 6. The method of claim 5,
The step of supplying the coating raw material is performed before the pressing step, and the coating raw material is supplied between the base film and the carrier film, the coating method. delete 6. The method of claim 5,
The step of supplying the coating raw material supplies the coating raw material at a flow rate of 0.5 L / min to 5 L / min,
The viscosity of the coating raw material is 50,000 cps to 1,000,000 cps, the coating method. delete delete

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