Method and apparatus for applying a layer of a separating agent to a substrate

Abstract

In a method which is used for coating a separating agent layer into a moving or movable substrate in a vacuum chamber, the separating agent is evaporated in an internal chamber of evaporator chamber which is provided with at least one nozzle that is aligned to the substrate. The method orders that the liquid separating agent used for vaporizing is sprayed into the internal chamber of the evaporator chamber. In a device thereof which is used for coating the separating agent into a moving or movable substrate in the vacuum chamber, the vacuum chamber is provided with at least one metal evaporator. The device is provided with an evaporator chamber which is configured with at least one nozzle aligned to the substrate, wherein the separating agent can be delivered to the internal chamber of the evaporator chamber through the conveying pipeline. Hereon, the conveying pipeline is connected with a spraying device, and the liquid separating agent which is used for vaporizing can be sprayed or be sprayed into the internal chamber of the evaporator chamber with the spraying device.

Description

technical field [0001] The present invention relates to a method and an apparatus for coating a layer of a separating agent on a moving or movable substrate in a vacuum chamber, wherein the separating agent is to be evaporated or can be evaporated in the inner chamber of an evaporator chamber equipped with at least one nozzle directed at the substrate was evaporated. Background technique [0002] The moving or moveable substrate, usually a strip substrate, will be coated with the metal in the vacuum chamber of the coating plant. When coating, the substrate will pass through the metal coating unit, where the substrate is unwound from a take-off drum by rollers and onto a take-up drum. [0003] Separating agents may generally involve esters, glycols, fluorinated hydrocarbons, and hydrocarbons. Perfluoropolyether oils are preferred. The substrate is provided with a masking layer by applying a release agent in the so-called blank space so that no metal is applied in this area...

AI Technical Summary

Problems solved by technology

However, since a pressure equalization hole is generally necessary, the separating agent vapor can enter the vacuum chamber at other places and contaminate the vacuum chamber

[0009] In the current separating agent evaporator, a large amount of separating agent is heated in the liquid tank, only a small part of the separating agent is evaporated during the coating process of the equipment, and the unevaporated part will continue to be used until the hard volatile components and Decomposition products cannot be used further and the evaporator must be cleaned

A disadvantage here is that the performance of the separating agent changes slowly and uncontrollably over the lifetime of the separating agent due to deposits of less volatile components and decomposition products

In addition, there is a residual liquid of separating agent that must be disposed of, which leads to waste and may be harmful to the environment

Images