KR-20260064687-A - Method for manufacturing a coating device and a substrate with a coating film attached

Abstract

The coating device of the present invention has a coating liquid discharge nozzle having a plurality of coating liquid discharge ports arranged in the width direction of a moving substrate, and at least two gas discharge nozzles for blowing gas onto a plurality of columnar coating liquids discharged from the coating liquid discharge ports. When observed from the discharge direction of the coating liquid, these two gas discharge nozzles are formed such that, with the row of coating liquid discharge ports in between, each gas discharge port is positioned so as to be located further toward the substrate than a virtual plane that passes through the coating liquid discharge ports and is orthogonal to the discharge direction of the coating liquid, and when observed from the width direction of the substrate, the angle formed by the axis extending from the gas discharge port in the discharge direction of the gas and the axis extending from the coating liquid discharge port in the discharge direction of the coating liquid is less than 90°.

Inventors

• 와타나베 카즈타카
• 타니노 키요시

Assignees

• 도레이 카부시키가이샤

Dates

Publication Date

20260507

Application Date

20240806

Priority Date

20230904

Claims (7)

1. A coating device for applying a droplet-shaped coating liquid to a moving substrate, A coating liquid discharge nozzle having a plurality of coating liquid discharge ports arranged in the width direction of the substrate, and Having at least two gas discharge nozzles for blowing gas onto a plurality of columnar coating liquids discharged from the coating liquid discharge port, The two gas discharge nozzles mentioned above are, Observed from the discharge direction of the coating liquid, each gas discharge port is spaced between the rows of the plurality of coating liquid discharge ports, The above gas discharge port is formed to be located at a position further toward the substrate than a virtual plane perpendicular to the discharge direction of the coating liquid, passing through the coating liquid discharge port. Additionally, a coating device in which, when observed from the width direction of the substrate, the angle formed by the axis extending from the gas discharge port in the direction of gas discharge and the axis extending from the coating liquid discharge port in the direction of coating liquid discharge is less than 90°.
2. In Article 1, A coating device in which the above gas discharge nozzle is installed to change the direction of gas discharge from the above gas discharge port observed from the width direction of the substrate.
3. In Article 1 or Article 2, A coating device in which, when observed from the width direction of the substrate, the distance from the intersection point of the axis extending in the direction of discharge of the coating liquid from the coating liquid discharge port and the axis extending in the direction of discharge of the gas from the gas discharge port to the coating liquid discharge port is 2 mm or more.
4. A coating liquid is discharged from a plurality of coating liquid discharge ports arranged in the width direction of the substrate toward a moving substrate, and Observing from the width direction of the moving substrate, a gas is blown toward the coating liquid at a position away from the coating liquid discharge port toward the substrate side from a direction that is symmetric with respect to the discharged coating liquid and also forms an angle of less than 90° with respect to the discharge direction of the coating liquid. A method for manufacturing a substrate with a coating film attached, wherein the above-mentioned coating liquid is applied to a substrate.
5. In Article 4, A method for manufacturing a coating film-attached substrate, wherein the distance from the position where the gas is blown in the coating liquid to the coating liquid discharge port is 2 mm or more.
6. In Article 4 or Article 5, A method for manufacturing a coating film-attached substrate, wherein the above coating solution contains a solid component.
7. In Article 4 or Article 5, A method for manufacturing a substrate with a coating film attached, wherein the solvent of the coating solution is an organic solvent.

Description

Method for manufacturing a coating device and a substrate with a coating film attached The present invention relates to a coating device for applying a droplet-shaped coating liquid to a substrate such as a film, nonwoven fabric, or paper, and a method for manufacturing a substrate with a coating film attached. Conventionally, a spray coating device is known as a coating device that applies a coating solution to a substrate in the form of droplets. In this spray coating device, from the perspective of the productivity and functionality of the substrate, it is required to uniformly apply micro-droplets over approximately the entire surface of a wide substrate. As a coating device for such cases, for example, Patent Document 1 discloses a two-fluid slot-type spray nozzle (hereinafter, "spray nozzle" is also simply referred to as "nozzle") capable of atomizing and spraying the coating liquid by the discharged air by simultaneously discharging compressed air along with the coating liquid. This spray nozzle has a plurality of coating liquid discharge ports in the width direction of the substrate, and air discharge ports are arranged to be inserted from the upstream and downstream sides in the substrate conveying direction relative to the coating liquid discharge ports. Accordingly, the discharged droplet-shaped coating liquid takes the form of a continuous strip in the width direction of the substrate, and since non-uniformity in coating film thickness or non-uniformity in coating does not occur, a uniform coating film can be formed. FIG. 1 is a schematic cross-sectional view of the coating device (100) of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the coating liquid discharge nozzle (110) of FIG. 1. FIG. 3 is an exploded perspective view showing the configuration of the gas discharge nozzle (120) of FIG. 1. FIG. 4 is a schematic cross-sectional view of the coating device (100) of the present invention and a drawing showing the shape when forming a coating film using the coating device (100). FIG. 5 is a lower view of the tip of the coating liquid discharge nozzle (110) of FIG. 1 seen from the coating liquid discharge port side. FIG. 6 is an exploded perspective view showing the configuration of a coating liquid discharge nozzle (210) according to another embodiment of the coating liquid discharge nozzle. FIG. 7 is a lower view of the tip of the gas discharge nozzle (120) shown in FIG. 1, viewed from the gas discharge port side. FIG. 8 is an exploded perspective view showing the configuration of a gas discharge nozzle (220) according to another embodiment of the gas discharge nozzle. FIG. 9 is a schematic diagram showing the apparatus (10) for manufacturing a coating film attachment substrate according to the present invention. FIG. 10 is a schematic cross-sectional view of a conventional integrated two-fluid nozzle (300). Preferred embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the forms shown in the drawings, and various modifications may be made within the scope of achieving the purpose of the invention and without departing from the essence of the invention. Refer to FIG. 1. FIG. 1 is a schematic cross-sectional view of a coating device (100) of a first embodiment of the present invention. The coating device (100) is composed of a coating liquid discharge nozzle (110) for discharging a coating liquid and a gas discharge nozzle (120, 120') for discharging a gas. Refer to FIG. 2. FIG. 2 is an exploded perspective view showing the configuration of the coating liquid discharge nozzle (110) of FIG. 1. The coating liquid discharge nozzle (110) is composed of a coating liquid nozzle block (111, 112) and a coating liquid core (113). One coating liquid nozzle block (111) has a coating liquid supply port (114) that supplies the coating liquid into the coating liquid discharge nozzle (110), and a coating liquid manifold (115) that communicates with the coating liquid supply port (114) to expand the coating liquid in the width direction. The coating liquid core (113) is a comb-shaped core that fits into the coating liquid nozzle block (111, 112), and by being combined with the coating liquid nozzle block (111, 112), the gaps between the combs of the coating liquid core (113) form a plurality of coating liquid flow paths in the width direction. Additionally, the gaps between the teeth of the coating liquid core (113) are connected to the coating liquid manifold (115). Here, "width direction" corresponds to a direction orthogonal to the discharge direction (X) of the coating liquid and the conveying direction (Y) of the substrate (1) (see FIG. 1). Refer to FIG. 3. FIG. 3 is an exploded perspective view showing the configuration of the gas discharge nozzle (120) of FIG. 1, and the gas discharge nozzle (120') of FIG. 1 has the same configuration. The gas discharge nozzle (120) is composed