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Powder paint operating temperature

Powder paint in composition is friable powder. On the surface of products, it is formed into a resistant coating by polymerization.

How does the polymerization process takes place?

Short description of the schemes:

  • Paint is applied with a special spray gun to the product.
  • Then this product is transferred to the polymerization furnace manually or via a conveyor in an automatic powder coating line.
  • The painter on the control panel of the polymerization furnace sets the main characteristics for the painting program
  • In a polymerization oven, the paint melts and polymerizes under the influence of temperatures.
  • The product is left to cool.

What should be the temperature for the polymerization of the paint?

The baking temperature of powder paint ranges from 170 to 220 ° C.

The choice of temperature conditions depends on the material to be painted, production capacities and the paint itself. For example, for glass or ceramics you need to choose a lower temperature range (180° C), and for metal you can set 220° C.

Температурная кривая отверждения порошковой краски

There is also a dependence of the curing temperature time in the polymerization furnace.

The higher the temperature, the less time is needed for complete polymerization. That is, at a temperature of 160° C it takes 15 minutes, and already at a temperature of 180° C – 8 minutes, etc.

The temperature mode is set in the control unit of the polymerization furnace. Before each series of painting you can set the required temperature.

Polymerization furnace

It is important to highlight the main equipment in powder coating – the polymerization furnace.

This equipment is necessary for the process of  paint polymerization. The design of the polymerization furnace depend on the space where it will be located, painted products, etc.

The furnace can be both for a manual line (for small volumes of painting) and for automatic powder coating lines.

There are also a dead end and a walk-through type.

печь полимеризации

печь полимеризации

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