| 摘要 |
The invention relates to a roll coating process for applying a coating layer on a non-continuous sheet, comprising the steps of 1) applying a liquid coating composition to the top surface of the sheet by passing the sheet horizontally between an applicator roll and a backing roll; 2) forwarding the coated sheet with a coated sheet forwarder; wherein forwarding is interrupted after passing the applicator roll while maintaining a meniscus of liquid coating composition between stopped sheet and rotating applicator roll, and forwarding is restarted when the meniscus has disappeared. With this process it is possible to make sheets coated with an optical coating like an anti-reflective coating, which sheets show markedly smaller and less visible edge defects, especially at the trailing edge. The invention also relates to a roll coating apparatus suitable for operating the process of the invention, which apparatus comprises at least an applicator roll, a backing roll, a coated sheet forwarder, and control means to operate the sheet forwarder depending on the position of a sheet in the apparatus. |
