What is curtain coating?

Curtain coating belongs to the class of premetered coating methods, meaning that only the exact amount of fluid to be coated onto the web is fed to the coating head. This gives significant advantages in terms of operational procedures and product quality when compared to other coating methods.

E.g. film thickness variations in MD can easily be kept below 1% (+/-0.5%) with the help of standard process control procedures for the web speed and the flow rate (pump speed).

Curtain coating has originally been developed to obtain a high degree of sophistication in the photographic industry. Now that the basic patents have expired, this method also is available to other industries.

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