Mar 11, 2019 Off Comments in Powder Coating by
Cleveland Ohio Powder Coating:  “Films as thin as a few microns can be achieved”

Thinner powder coatings mean lower material costs. But how thin can the layers be without the disadvantages outweigh. We talked to two powder coating experts about this and other trends.

Less material means lower costs. Naturally it seems that lowering the film thickness of a coatings is always a desirable target. “Fully coherent powder coating films as thin as 20-30 μm have been achieved on commercial application lines” explains Nigel Sherwing who works as Technical Director at Akzo Nobel.

And even more is possible: “In theory, films as thin as a few microns can be achieved with powders.” However, he sees some challenges for that. As does Robert Watson, Global Marketing Manager for Powder Coatings Resins at Allnex.

Thin powder coatings can have downsides

“Lower film thicknesses have a greater tendency to show increased orange peel, and additionally hiding power is reduced, especially in lighter shades and coatings with organic pigmentation”, explains Watson. He also sees the risk of reduced protective properties: “Lower film thickness can negatively impact edge coverage which can lead to a higher risk of corrosion.”

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