Coating device, and coating method using said device
View Patent ↗A coating device is provided which has a bar which coats a coating liquid on a strip-shaped body conveyed in a given direction, and a dam-shaped member disposed at an upstream side of the bar so as to face the bar. Also provided is a coating method which, in the coating device, supplies the coating liquid from between the dam-shaped member and the bar so as to carry out coating. A flow rate of the coating liquid passing through a gap between the strip-shaped body and the dam-shaped member is set to be 3 m/min or more. A flow rate of the coating liquid passing through a gap between the bar and the dam-shaped member is set to be 5 mm/sec or more.
1. A coating device comprising:
a bar which coats a coating liquid on a strip-shaped body conveyed in a given direction,
an upstream side dam-shaped member disposed at an upstream side of the bar so as to face the bar, the coating device carrying out coating by supplying the coating liquid from between the upstream side dam-shaped member and the bar,
means for setting a flow rate of the coating liquid passing through a gap between the bar and the upstream side dam-shaped member to be 5 mm/sec or more, and
a downstream side dam-shaped member disposed at a downstream side of the bar so as to face the bar,
wherein the flow rate of the coating liquid both at a primary side clearance which is the gap between the bar and the upstream side dam-shaped member, and at a secondary side clearance which is a gap between the bar and the downstream side dam-shaped member, is set to be 5 mm/sec or more.
2. The coating device of claim 1 , wherein the gap between the bar and the upstream side dam-shaped member is a value in a range of greater than 0.1 mm and less than 10 mm.
3. The coating device of claim 1 , wherein the bar rotates at a circumferential speed which is equal to a conveying speed of the strip-shaped body.
4. The coating device of claim 1 , wherein the bar rotates at a circumferential speed which different than a conveying speed of the strip-shaped body.
5. The coating device of claim 4 , wherein the bar rotates in a direction opposite to the conveyed direction of the strip-shaped body.
6. The coating device of claim 1 , wherein each of the upstream and downstream dam-shaped members is a rectangular plate.
7. The coating device of claim 1 , wherein the strip-shaped body is a flexible base material.
8. The coating device of claim 1 , further comprising a base which supports the dam-shaped members from beneath, and the base is box-shaped.