Coating apparatus and coating film manufacturing method

摘要

A coating apparatus includes a die coater that supplies a coating liquid to a web. The die coater includes a die main body, a manifold, a slot, a lip face, a mount, a decompression chamber, and a container. The container includes a guide plate guiding the coating liquid or a solvent ejected from the slot of the die coater without bringing the coating liquid or solvent into contact with the mount and the decompression chamber in a non-steady state, in which the coating liquid is not supplied from the die coater to the web. The container collects the coating liquid or the solvent guided by the guide plate. The coating apparatus also includes a liquid discharge tube that is connected to the container and discharges the coating liquid or solvent to an outside of the decompression chamber.

主权项

1. A coating apparatus comprising:
a die coater that supplies a coating liquid to a web which is continuously travelling, the die coater including a die main body, a manifold into which the coating liquid is supplied and which is formed in the die main body, a slot from which the coating liquid is ejected and which is formed in the die main body and communicating with the manifold, and a lip face formed in the die main body at a tip of the slot; a mount that supports the die coater; a decompression chamber that is disposed upstream of the die coater in a web conveyance direction; a container that includes a guide plate guiding the coating liquid or a solvent ejected from the slot of the die coater, the container collecting the coating liquid or the solvent guided by the guide plate, without bringing the coating liquid or solvent into contact with the mount and the decompression chamber while the coating liquid or the solvent is ejected from the slot in a state where the die coater is positioned apart from the web with a predetermined clearance therebetween, the predetermined clearance being larger than a clearance which is kept between the die coater and the web while the coating liquid is supplied to the web from the die coater; and a liquid discharge tube that is connected to the container and discharges the coating liquid or solvent to an outside of the decompression chamber, wherein the container including the guide plate is integrally formed, and the container is attached to the die main body by a plurality of attachment units along a width direction of the web, and an average distance between the attachment units and a lowest end portion of the container is 80 mm or more.