KR20200057431A - Slot die coating unit - Google Patents

Abstract

A slot die coating unit includes a chamber unit, a roller unit, and a slot unit. The chamber unit forms a storage chamber in which a coating material is located. The roller unit is coupled to the chamber unit to penetrate the storage chamber and improves the fluidity of the coating material located in the storage chamber. The slot unit is coupled to an end of the chamber unit to form predetermined intervals for discharging the coating material. Uniform coating can be conducted via the slot die coating.

Description

Slot die coating unit {SLOT DIE COATING UNIT}

The present invention relates to a slot die coating unit, and more particularly, to a slot die coating unit capable of performing coating through a slot die process even for a high viscosity material having a relatively high viscosity.

In general, the slot die coating method is a typical coating method for applying a coating material to various adherends. As the coating material, adhesives, adhesives, sludges, hard coatings, ceramics, etc. may be used. It is a method of supplying between the molds processed by the flow of the slot die by a piston pump and uniformly discharging it to a film, glass, sheet, etc. to perform application.

This slot die coating method can be applied in a uniform amount or a uniform thickness, and thus has excellent safety and reproducibility of the coating, can maintain the composition, viscosity, and temperature of the coating material and perform coating, and contamination during coating operation There are few, excellent surface and pre-treatment properties, and process advantages such as being able to perform multi-layer work, so it is widely used in various technical fields.

However, as shown in FIG. 1 (source, Comparison of Coating Techniques Gravure Roll (Contact) vs. Curtain (Non-contact), AIMCAL Web Coating Conference, Prague 2012), this slot die coating method is typically applied. In the range of coating speed (approximately within 6,000 m / min), it is known that it is difficult to apply to a high viscosity material of 5,000 mPaS or more. That is, in the case of a relatively high-viscosity material, as the fluidity of the coating material rapidly decreases, it is difficult to supply the thin film and the generation of bubbles increases, thereby making it difficult to uniformly apply through slot die coating.

Accordingly, in order to apply the process advantages of the slot die coating method to a variety of coating materials, there is an increasing demand for a slot die coating apparatus capable of applying the slot die coating method to a high viscosity material of 5,000 mPaS or more. .

Republic of Korea Patent Registration No. 10-1653215 Republic of Korea Registered Patent No. 10-1841346

Accordingly, the technical problem of the present invention is conceived in this regard, and the object of the present invention relates to a slot die coating unit capable of uniformly performing slot die coating on a high viscosity material having a relatively high viscosity.

The slot die coating unit according to an embodiment for realizing the above object of the present invention includes a chamber unit, a roller unit and a slot unit. The chamber portion forms a storage chamber in which a coating material is located. The roller unit is coupled to the chamber portion to penetrate the storage chamber, and improves the fluidity of the coating material located in the storage chamber. The slot unit is coupled to the end of the chamber portion to form a predetermined gap for discharging the coating material.

In one embodiment, the chamber portion includes a first chamber to which an injection tube provided with the coating material is connected, and a second chamber coupled to the first chamber, wherein the storage chamber is provided in the first chamber. It can be formed into space.

In one embodiment, the first and second chambers may further include a slot plate interposed so as not to overlap the storage chamber and the slot unit.

In one embodiment, the roller unit may include a roller part having a bar shape and penetrating the first chamber.

In one embodiment, the roller portion has a cylindrical bar shape and can rotate within the storage chamber.

In one embodiment, the roller portion is spaced a predetermined distance from the first chamber in the storage chamber to form a flow space of the coating material, and may be in close contact with the second chamber.

In one embodiment, the roller unit may include a plurality of screws protruding along the outer surface of the roller portion, and a fixing unit fixing the roller portion to the chamber portion.

In one embodiment, the screws are projected in a direction perpendicular to the extending direction of the roller portion, and may be formed at regular intervals along the outer surface of the roller portion.

In one embodiment, the screws, may protrude in an oblique direction to the extending direction of the roller portion.

In one embodiment, as the screws move toward the center of the roller portion, an angle formed with an extending direction of the roller portion increases, and a gap between adjacent screws may be narrowed.

In one embodiment, the chamber portion, located in the lower portion of the storage chamber, may further include a mixing chamber formed in a predetermined space in the second chamber.

In one embodiment, the upper portion of the mixing chamber may partially overlap the lower portion of the storage chamber.

In one embodiment, the volume of the mixing chamber may be smaller than the volume of the storage chamber.

According to embodiments of the present invention, since the fluidity of the coating material can be improved through the roller unit penetrating through the storage chamber of the slot die coating unit, the slot die coating is also performed for the relatively high viscosity coating material of 5,000 mPaS or more. Uniform coating can be performed.

In particular, the roller unit has a cylindrical bar shape and rotates in the interior of the storage chamber, so that the fluidity of the coating material can be improved through rotation in one direction, and a screw is added to the outer surface of the roller portion of the cylindrical bar shape As it is formed of, the frictional force with the coating material can be further improved to further improve fluidity.

Further, the screw is formed by a plurality of uniformly spaced, it is possible to induce a uniform flow of the coating material in the storage chamber, on the other hand, the gap is narrowed toward the center and is formed to have a predetermined slope, By inducing a relatively non-uniform flow, the fluidity can be further improved.

In addition, as the outer surface of the roller part is spaced apart from the first chamber by a predetermined distance, but is formed to contact the second chamber, it is possible to induce uniform discharge by blocking re-rise of the coating material flowing downward.

In addition, as the mixing chamber is additionally formed at the bottom of the storage chamber, the flow of the coating material flowing according to the rotational flow is optimized to induce flow to the lower direction, thereby inducing more uniform discharge of the coating material. Can be.

1 is a graph illustrating a coating method that can be performed according to the viscosity of the coating material.
2 is a perspective view showing a slot die coating apparatus including a slot die coating unit according to an embodiment of the present invention.
3 is a perspective view showing the slot die coating unit of FIG. 2.
4 is a cross-sectional view taken along line I-I 'of FIG. 3.
5 is an exploded perspective view showing the slot die coating unit of FIG. 3 in an exploded view.
6 is a cross-sectional view taken along line II-II 'of FIG. 3.
7 is a perspective view showing a roller unit in the slot die coating unit according to another embodiment of the present invention.
8 is a perspective view showing a roller unit in the slot die coating unit according to another embodiment of the present invention.
9 is a cross-sectional view showing the inside of the slot die coating unit to which the roller unit of FIG. 8 is applied.
10A and 10B are graphs illustrating sample flow rate and flow uniformity when coating is performed through a slot die coating unit to which the roller unit of FIG. 8 is applied.
11 is a cross-sectional view showing the interior of the slot die coating unit according to another embodiment of the present invention.
12 is an image showing the state of the coating material when performing the coating process through the slot die coating unit of Figure 11, Figure 13 shows the uniformity of the coating result when performing the coating process through the slot die coating unit of Figure 11 It is a graph.

The present invention can be applied to various changes and can have various forms, and the embodiments are described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from other components. The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as “comprise” or “consist of” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

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

2 is a perspective view showing a slot die coating apparatus including a slot die coating unit according to an embodiment of the present invention.

Referring to FIG. 2, first, the slot die coating unit 10 according to the present embodiment is applied to a slot die coating apparatus 1, wherein the slot die coating apparatus 1 applies the slot die coating unit 10 to the slot die coating unit 10. The coating material uniformly provided through is coated on the substrate 20, and the substrate 20 is driven by the driving unit 40 to be provided at a predetermined speed. Accordingly, the coating material is uniformly applied on the substrate 20.

In this case, at the rear end of the slot die coating unit 10, a vacuum chamber 30 is provided to improve the uniformity of the coating material discharged from the slot die coating unit 10.

In addition, a plurality of idle rollers 51, 52, 53, and 54 are provided for the transfer of the substrate 20, and a tensioner 60 is provided between the idle rollers to be applied to the substrate 20 The tension is kept constant.

In addition, the substrate 20 to which the coating material is applied is dried while passing through the dryer 80, and the dryer 80 exhausts the material according to drying of the coating material through the exhaust unit 90.

Furthermore, when the coating process is finished, the coating material may be removed from the substrate 20 through a scraper 70.

That is, the slot die coating unit 10 in this embodiment may be provided in the slot die coating apparatus 1 described briefly, and details will be described below with reference to the drawings.

3 is a perspective view showing the slot die coating unit of FIG. 2. 4 is a cross-sectional view taken along line I-I 'of FIG. 3. 5 is an exploded perspective view showing the slot die coating unit of FIG. 3 in an exploded view. 6 is a cross-sectional view taken along line II-II 'of FIG. 3.

3 to 6, the slot die coating unit 10 according to the present embodiment includes a chamber part 100, an injection tube 200, a roller unit 300, a slot unit 400, and a slot plate 500 ).

The chamber part 100 includes a pair of first chamber 110 and second chamber 120, the first chamber 110 and the second chamber 120 are formed in a similar symmetrical shape as a whole The slot plates 500 are interposed in the middle and are bonded to each other and combined.

Although the first chamber 110 and the second chamber 120 are adhered to each other by the slot plate 500, a predetermined gap GAP is formed in the middle.

Meanwhile, the first and second chambers 110 and 120 form a rectangular block-shaped chamber part 100 as a whole, but are narrowed downward to form a triangular pillar shape.

The second chamber 120, as shown in Figure 5, the contact surface is formed to have a rectangular shape, on the other hand, the first chamber 110, as shown in Figure 4, the central portion in addition to the rectangular contact surface In the storage chamber 112 is formed.

Meanwhile, first and second slots 410 and 420 of the slot unit 400 are coupled to ends of the first and second chambers 110 and 120, respectively.

The first and second slots 410 and 420 form a predetermined gap G, as illustrated in FIG. 3, and the formed gap may be variously formed. That is, the first and second slots 410 and 420 may be provided to have various gaps. Accordingly, the first and second slots 410 and 420 having the necessary gaps are selected to select the first and second slots. And by coupling to the end of the second chamber (110, 120), it is possible to form the required gap.

Thus, the slot die coating unit 10 is capable of forming various gaps in consideration of the discharge amount of the coating unit.

On the other hand, the injection tube 200 is connected to the upper portion of the first chamber 110, the injection tube 200 may be connected to at least one or more, if a plurality of connected to be arranged at regular intervals with each other Can be.

In this case, if one injection tube 200 is formed, the injection tube 200 is unlike the cylindrical shape shown, so that the coating material can be uniformly introduced over the entire area of the storage chamber 112 The first chamber 110 may be formed to be elongated along the longitudinal direction.

The injection tube 200 is directly connected to the storage chamber 112 formed inside the first chamber 110, and accordingly, the coating material provided to the injection tube 200 is the storage chamber ( 112).

6, the inner surface of the first chamber 110 facing the second chamber 120 is recessed in a direction opposite to the direction toward the second chamber 120 as illustrated in FIG. 6. Is formed to form a predetermined space.

That is, as illustrated in FIG. 6, the storage chamber 112 has a concave cross-sectional shape that becomes narrower toward the lower portion connected to the slot unit 400 after the space is enlarged from the upper portion connected to the injection tube 200. Can have

Thus, the coating material provided from the injection tube 200 may be stored at a slow flow rate in the storage chamber 112 and then uniformly discharged to the outside through the slot unit 400.

The roller unit 300 includes a roller unit 310, a screw 320, a fixing unit 330 and an intervening unit 340.

The roller portion 310 may have a cylindrical bar shape extending in the longitudinal direction, and penetrates both sides in the longitudinal direction of the first chamber 110 to penetrate the storage chamber 112 and extend. do.

The portion through which the roller portion 310 passes through the storage chamber 112 may be a central portion of the storage chamber 112, so that the roller portion 310 is larger than the maximum width of the storage chamber 112. It is preferably formed with a small diameter.

The roller part 310 is one direction inside the storage chamber 112, as shown in FIG. 6, in the same direction as the direction in which the coating material provided from the top flows downward, for example, counterclockwise. Will rotate.

In this case, an intervening unit 340 including a bearing may be provided between the first chamber 110 and the roller unit 310 so that the roller unit 310 can rotate, and the roller unit 310 ), The fixing unit 330 may be coupled to fix the outer side of the first chamber 110.

On the other hand, although not shown, the roller unit 310 may be rotated in connection with a driving unit providing a separate rotational driving force.

Furthermore, in this embodiment, a screw 320 is formed on the outer surface of the roller portion 310.

The screw 320 protrudes from the outer surface of the roller portion 310 in a direction crossing the extending direction of the roller portion 310, and protrudes in a thin circular plate shape, thereby increasing the contact area with the coating material. Can be.

Meanwhile, as shown in FIG. 4, the screw 320 protrudes in an inclined direction with respect to the extending direction of the roller part 310, and a plurality of screws 320 protrude from the roller part 310. Can be.

In this case, the angle formed by the screw 320 with the roller part 310 increases as the screw 320 positioned from the outer edge of the roller part 310 to the central part of the roller part 310 increases. That is, the screw 320 protruding from the central portion of the roller portion 310 has an inclination angle closer to vertical (90 °).

In addition, the separation distance between adjacent screws, that is, the spacing is also formed to be narrower toward the center of the roller portion 310.

Thus, as it goes from the outer edge of the roller portion 310 to the center portion, the number of screws increases, and the angle at which the screw forms with the roller portion increases.

This increases the density of the coating material as it moves toward the center of the storage chamber 112, and thus the fluidity may decrease, thereby increasing the contact area with the coating material with respect to the central portion of the storage chamber 112. This is to improve the fluidity of the coating material inside the storage chamber 112.

In particular, in the case of the present embodiment, as a device for performing slot die coating using a high viscosity material of 5,000 mPaS or more as a coating material, it is to solve a problem that it was difficult to perform uniform coating due to a problem of fluidity of a conventional high viscosity material.

Therefore, in the present embodiment, the slot die while ensuring sufficient fluidity even for a relatively high-viscosity material by using the rotationally driven roller part 310 and the screw 320 extending from the roller part 310 as described above. Coating can be performed.

On the other hand, as shown in Figure 6, the screw 320 may be formed to be spaced apart a predetermined distance so that the outer surface does not contact the second chamber 120 when rotating, and accordingly, the relatively sharp screw 320 ) May prevent the problem of damage to the second chamber 120 or the screw 320 while contacting the second chamber 120.

As described above, by further improving the fluidity of the coating material located in the storage chamber 112 through the rotational drive of the roller 310 and the screw 320 in an upper to lower direction (see arrows), Slot die coating can be performed by inducing uniform discharge even for relatively high-viscosity materials.

Meanwhile, as described above, the slot plate 500 is interposed between the first and second chambers 110 and 120 to maintain a gap between the first and second chambers 110 and 120. However, it is formed in a 'c' shape as a whole, and is disposed so as not to overlap with the storage chamber 112 and the slot unit 400.

7 is a perspective view showing a roller unit in the slot die coating unit according to another embodiment of the present invention.

The roller unit 301 in the slot die coating unit according to this embodiment is substantially the same as the slot die coating unit 1 described with reference to FIGS. 3 to 6 except that the shape of the screw 321 is different. Therefore, redundant description will be omitted.

Referring to FIG. 7, in the slot die coating unit in this embodiment, the roller unit 301 includes a roller portion 311 and a screw 321, although not shown, the rollers in FIGS. 3 to 6 It includes the same fixed unit and intervening unit as in the unit.

The case of the roller portion 311 is the same as having a cylindrical bar shape extending in one direction.

However, a plurality of the screws 321 protrude at a uniform interval from each other on the roller portion 311. Further, the screw 321 protrudes from the roller portion 311 only in a direction perpendicular to the extending direction of the roller portion 311.

Thus, through the roller unit 301 in this embodiment, when considering the arrangement and shape of the screw, the coating material in the storage chamber 112 flows from the top to the bottom in a more uniform flow. do.

Therefore, since a uniform flow is induced in the storage chamber 112, the coating material discharged to the lower portion can also be discharged with improved uniformity.

8 is a perspective view showing a roller unit in the slot die coating unit according to another embodiment of the present invention. 9 is a cross-sectional view showing the inside of the slot die coating unit to which the roller unit of FIG. 8 is applied.

Since the roller unit 302 in the slot die coating unit according to this embodiment is substantially the same as the slot die coating unit 1 described with reference to FIGS. 3 to 6, except that a screw is not formed, overlapping The description is omitted.

8 and 9, in the slot die coating unit in this embodiment, the roller unit 302 is the same as in the roller unit 312 and the roller unit in FIGS. It includes a fixed unit and an intervening unit.

The case of the roller portion 312 is the same as having a cylindrical bar shape extending in one direction.

However, in this embodiment, since a screw is not additionally formed, the contact area between the roller unit 302 and the coating material may be relatively reduced.

However, the roller part 312 in this embodiment is rotated while one side directly contacts the inner surface of the second chamber 120. That is, the roller portion 312 maintains a predetermined distance from the inner surface of the first chamber 110 to form a space through which the coating material can flow, but directly contacts the inner surface of the second chamber 120. By doing so, the space in which the coating material can flow is sealed.

Thus, in the above embodiments, the coating material flowing from the inside of the storage chamber 112 from the top to the bottom, the gap between the screws 320, 321 and the second chamber 120 or the roller portion 310 , 311) and the second chamber 120 can be re-rised at intervals to prevent the problem of deterioration in fluidity.

10A and 10B are graphs illustrating sample flow rate and flow uniformity when coating is performed through a slot die coating unit to which the roller unit of FIG. 8 is applied.

More specifically, FIG. 10A is a graph showing sample flow rate and flow uniformity at the outlet over time when the roller unit 312 of the roller unit 302 rotates at 30 rpm, and FIG. 10B is the roller unit It is a graph showing sample flow rate and flow uniformity at the outlet over time when (312) is rotated at 120 rpm.

10A and 10B, when the roller part 312 rotates at a relatively low rotation speed of 30 rpm, it rotates at a relatively high rotation speed in terms of sample flow rate or flow uniformity. Compared to the case, it can be said to be excellent, and through this, a more uniform thin film can be formed.

11 is a cross-sectional view showing the interior of the slot die coating unit according to another embodiment of the present invention.

In the slot die coating unit according to the present embodiment, since the chamber part 100 further includes a mixing chamber 113, the slot die coating unit described with reference to FIGS. 8 and 9 is substantially the same. , Redundant description is omitted.

Referring to FIG. 11, in this embodiment, the chamber part 100 further includes a mixing chamber 113 in addition to the storage chamber 112.

The mixing chamber 113 is formed under the storage chamber 112, and the storage chamber 112 is formed while the first chamber 110 is recessed inward, whereas the mixing chamber 113 is formed. Is formed as the second chamber 120 is recessed inward.

In this case, the mixing chamber 113 is formed below the storage chamber 112, and as shown, the lower end of the storage chamber 112 overlaps with the upper end of the mixing chamber 113. .

In addition, the volume of the mixing space of the mixing chamber 113 is smaller than the volume of the storage space of the storage chamber 112 as a whole. Thus, the coating material is unnecessarily stored in the mixing chamber 113 that does not form a separate flow stream, thereby preventing a problem that hinders the flow of the flow.

Thus, the coating material, which is moved to the lower portion by accelerating the flow in the storage chamber 112, is naturally provided to the mixing chamber 113 as shown by the arrow in FIG. 11, and further mixing is performed, and then discharged to the lower portion. .

As described above, as the mixing chamber 113 is further formed below the storage chamber 112, it occurs as the passage narrows rapidly in the process where the accelerated fluid is discharged downward from the storage chamber 112. The bottleneck may be prevented, and as mixing of the coating material in the mixing chamber 113 is additionally performed, a more uniform coating material may be discharged downward.

12 is an image showing the state of the coating material when performing the coating process through the slot die coating unit of Figure 11, Figure 13 shows the uniformity of the coating result when performing the coating process through the slot die coating unit of Figure 11 It is a graph.

In the case of FIGS. 12 and 13, the results of experiments on high-viscosity materials of 10 PaS or more are illustrated.

First, as illustrated in FIG. 12, through the embodiment described in FIG. 11, when the mixing chamber 113 is additionally formed, a coating material has a volume fraction of liquid in the storage chamber 112. From this, it can be seen that it is kept relatively high and constant in the process of being discharged downward through the mixing chamber 113.

Thus, it can be seen that the uniformity during the flow of the coating material is maintained as a whole.

In addition, as shown in FIG. 13, the mass flow rate of the coating material discharged through the slot unit 400 of the slot die coating unit is also the longitudinal direction of the slot unit 400 (on the graph It can be seen that it is very uniform along the X axis).

Through this, in particular, in the case where the roller unit is provided on the storage chamber as in this embodiment, in particular, when the mixing chamber is additionally formed, it is possible to improve the uniformity of discharge even for a high viscosity material having a relatively high viscosity of 5,000 mPaS or more. have.

According to the embodiments of the present invention as described above, since the fluidity of the coating material can be improved through the roller unit penetrating through the storage chamber of the slot die coating unit, the slot die is also applied to a coating material having a relatively high viscosity of 5,000 mPaS or more. Uniform coating may be performed through coating.

In particular, the roller unit has a cylindrical bar shape and rotates in the interior of the storage chamber, so that the fluidity of the coating material can be improved through rotation in one direction, and a screw is added to the outer surface of the roller portion of the cylindrical bar shape As it is formed of, the frictional force with the coating material can be further improved to further improve fluidity.

Furthermore, the screw may be formed at a uniform interval to induce uniform flow of the coating material in the storage chamber, and, on the other hand, the interval toward the center becomes narrower and is formed to have a predetermined slope, By inducing a relatively non-uniform flow, the fluidity can be further improved.

In addition, as the outer surface of the roller part is spaced apart from the first chamber by a predetermined distance, but is formed to contact the second chamber, it is possible to induce uniform discharge by blocking re-rise of the coating material flowing downward.

In addition, as the mixing chamber is further formed at the bottom of the storage chamber, the flow of the coating material flowing according to the rotational flow is optimized to induce flow so that it can flow downward, thereby inducing more uniform discharge of the coating material. Can be.

Although described above with reference to the preferred embodiments of the present invention, those skilled in the art may variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

1: Slot die coating device 10: Slot die coating unit
100: chamber part 110: first chamber
112: storage chamber 113: mixing chamber
120: second chamber 200: injection tube
300, 301, 302: roller unit 310, 311, 312: roller unit
320, 321: Screw 330: Fixing unit
340: intervening unit 400: slot unit
410: first slot 420: second slot
500: slot plate

Claims (13)

A chamber part forming a storage chamber in which a coating material is located;
A roller unit coupled to the chamber portion to penetrate the storage chamber and improving the fluidity of the coating material located in the storage chamber; And
A slot die coating unit including a slot unit coupled to an end of the chamber portion to form a predetermined gap for discharging the coating material. According to claim 1, The chamber portion,
A first chamber to which an injection tube provided with the coating material is connected; And
And a second chamber coupled with the first chamber,
The storage chamber is a slot die coating unit, characterized in that formed in a predetermined space in the first chamber. According to claim 2,
A slot die coating unit further comprising a slot plate interposed between the first and second chambers so as not to overlap the storage chamber and the slot unit. According to claim 2, The roller unit,
A slot die coating unit having a bar shape and comprising a roller portion penetrating the first chamber. According to claim 4, The roller portion,
A slot die coating unit having a cylindrical bar shape and rotating in the storage chamber. According to claim 4, The roller portion,
Slot die coating unit, characterized in that spaced apart a predetermined distance from the first chamber in the storage chamber to form a flow space of the coating material, and in close contact with the second chamber. The method of claim 4, wherein the roller unit,
A plurality of screws protruding along the outer surface of the roller portion; And
Slot die coating unit comprising a fixing unit for fixing the roller portion to the chamber. The method of claim 7, wherein the screws,
Slot die coating unit, characterized in that protruding in a direction perpendicular to the direction of extension of the roller portion, and formed at regular intervals along the outer surface of the roller portion. The method of claim 7, wherein the screws,
Slot die coating unit, characterized in that protruding in an oblique direction to the extending direction of the roller portion. The screw of claim 9,
The slot die coating unit, characterized in that, as it goes toward the center of the roller portion, an angle formed with an extending direction of the roller portion increases, and a gap between adjacent screws decreases. According to claim 2, The chamber portion,
Located in the lower portion of the storage chamber, the slot die coating unit further comprises a mixing chamber formed in a predetermined space in the second chamber. The method of claim 11,
A slot die coating unit, characterized in that the upper portion of the mixing chamber partially overlaps the lower portion of the storage chamber. The method of claim 11,
The volume of the mixing chamber is a slot die coating unit, characterized in that smaller than the volume of the storage chamber.

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