Curtain coating apparatus and curtain coating method

摘要

A curtain coating apparatus including: a pair of edge guides configured to support both side edges of at least one coating liquid so as to form a coating liquid film which falls freely and apply the coating liquid film onto a continuously running support; and an auxiliary water introduction port which allows auxiliary water to be introduced substantially uniformly with respect to a width direction of an edge guide auxiliary water flow-down surface of each edge guide from an upper portion toward a lower portion of the flow-down surface, wherein the flow-down surface has at its upper portion a flat surface portion, and wherein the flow-down surface has at its lower portion an arc-shaped portion which is provided at a center and which protrudes in the shape of an arc, and a flat surface portion which is provided on both sides of the arc-shaped portion.

主权项

1. A curtain coating apparatus comprising:
a pair of edge guides configured to support both side edges of at least one coating liquid so as to form a coating liquid film which falls freely and apply the coating liquid film onto a continuously running support; and an auxiliary water introduction port which allows auxiliary water to be introduced substantially uniformly with respect to a width direction of an edge guide auxiliary water flow-down surface of each edge guide from an upper portion toward a lower portion of the edge guide auxiliary water flow-down surface, wherein the edge guide auxiliary water flow-down surface has at its upper portion a flat surface portion which is substantially in the form of a flat surface, wherein the edge guide auxiliary water flow-down surface has at its lower portion an arc-shaped portion which is provided at a center with respect to the width direction and which protrudes in the shape of an arc, and a flat surface portion which is provided on both sides of the arc-shaped portion with respect to the width direction, and wherein the arc-shaped portion extends from one side of the flat surface portion to the other side of the flat surface portion in a smooth continuous manner.