Curtain Coating

Definition - What does Curtain Coating mean?

A curtain coating is a process where a substrate or other object is channeled through a falling film of coating.

There are two conveyors used in this process and the curtain of fluid is located between a gap in these two conveyors. The coating falls down in between the two conveyors. A tank containing the coating is used to supply the mechanism from which a thin coating film falls between the two conveyors. The coating’s thickness is often measured by the conveyor system’s speed and the rate that the pre-metered coating is drawn from the storage tank.

Corrosionpedia explains Curtain Coating

A curtaining appearance or the appearance of a long horizontal run after the coating process is completed is considered to be a coating defect. To prevent such defects the curtain coating process has been developed.

The converting industry commonly uses the curtain coating technique to coat a substrate.

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