Curtain coating apparatus and curtain coating process

A curtain coating apparatus for applying a coating solution to a continuously moving web, which comprises an air jet injector for injecting air in the upstream direction of a web, provided at a position upstream of a contact point of a curtain film with the web, a shielding member for shutting off entrained air generated by movement of the web, provided between the contact point and the air jet injector, thereby eliminating an influence of turbulent air flow and preventing the curtain film from suction toward the air jet injector, and a control member connected to the shielding member, the control member being provided at a position near and in parallel to the web, thereby preventing the entrained air from regrowth in the course between the air jet injector and the contact point.

A curtain coating apparatus for applying a coating solution to a continuously moving web, which comprises an air jet injector for injecting air in the upstream direction of a web, provided at a position upstream of a contact point of a curtain film with the web, a shielding member for shutting off entrained air generated by movement of the web, provided between the contact point and the air jet injector, a control member and a partition wall member, both of which are integrated with the shielding member to form a closed space, the air jet injector and an air suction means being provided in the closed space, thereby making the closed space a subatmospheric pressure zone.

A curtain coating apparatus for applying a coating solution to a continuously moving web, which comprises an air jet injector for injecting air in the upstream direction of a web, provided at a position upstream of a contract point of a curtain film with the web, the air jet injector being provided with an air injection pipe with air injection nozzles for shutting off entrained air generated by movement of the web, thereby eliminating an influence of turbulent air flow and preventing the curtain film from suction toward the air jet injector, and a partition wall member covering a distance upstream of a coater head, which extends from a position at the top of the air injection pipe with the air injection nozzles to a position near the web moving direction-shifting sector of a roll from the vertical direction to the horizontal direction, thereby making the partition wall member-enclosed zone a closed space, the air jet injector and an air suction means being provided in the close space, thereby making the closed space a subatmospheric pressure zone.