Air Knife Coating Machine In Air Knife coater a coating roll and pan are used to apply the coating solution to the web and then an air knife is positioned after the pan to regulate the final wet-coating weight by applying a focused jet of air to the web. It was broadly used to successively cover the different layers required for photographic movies in light of the fact that it could apply thin layers from low thickness arrangements. Slide and blind coating on account of enhanced quality, higher rates and multilayer ability supplanted it.
The advantage of the air-knife processes are low initial cost, versatility for aqueous coating of coating a variety of webs and solutions, easiness of shifting and preserving the coating and the good coating quality. The disadvantages are line speed and coating weight limitations, noise, solution viscosity limitations, and susceptibility to streaks and chatter.