Coating apparatus, coating method, and method for manufacturing optical film

Abstract

The coating apparatus includes a base for supporting a slot die, wherein the base has a height of not more than 5 m from a ground level, and a mean cross sectional area of not less than 3 m2 in terms of a horizontal direction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view showing an entire structure of a manufacturing line of an optical film (a slot die coater type coating system);

FIG. 2 is a structural view showing a die coater, a backup roller, and accessories thereof;

FIG. 3 is a perspective view showing a die coater which is cut at its middle;

FIG. 4 is a view showing the structure of a die coater and a backup roller in a first embodiment as seen from a side thereof;

FIG. 5 is a cross sectional view showing a base in the first embodiment as seen from a side thereof;

FIG. 6 is a view showing the base in the first embodiment as seen from a top thereof;

FIG. 7 is a cross sectional view showing a base in a second embodiment as seen from a side thereof;

FIG. 8 is a view showing the base in the second embodiment as seen from a top thereof; and

FIG. 9 is a view showing the structure of a die coater and a backup roller in a third embodiment as seen from a side thereof.

Claims

1. A coating apparatus comprising a base for supporting a slot die, wherein the base has a height of not more than 5 m from a ground level, and a mean cross sectional area of not less than 3 m2 in terms of a horizontal direction.

2. The coating apparatus according to claim 1, wherein a top portion of the base shows acceleration of not more than 0.3 Gal at a frequency of not less than 5 Hz according to a root-mean-square value obtained by a ⅓ octave-band peak hold analysis of a 60-second sampling data.

3. The coating apparatus according to claim 1, wherein the base is made of concrete or reinforced concrete.

4. The coating apparatus according to claim 1, wherein the base supports both an applicator which includes the slot die, and a coating roll apparatus which supports a medium to which a coating solution ejected from the slot die is applied.

5. The coating apparatus according to claim 1, further comprising at least one of a vibration damping apparatus and a vibration isolation apparatus which is interposed between the slot die and the base.

6. The coating apparatus according to claim 1, wherein the slot die is a die coater or a slide coater.

7. A coating method comprising the steps of: preparing a medium; andforming a coating film on the medium by using the coating apparatus according to claim 1.

8. A method for manufacturing an optical film, comprising the steps of: forming a coating film on a medium by using the coating apparatus according to claim 1; andmanufacturing an optical film including the coating film.

9. The coating method according to claim 8, wherein the optical film is an anti-reflection film.