Paint - General Information » Tools and Equipment for Paint Repairs
Infrared drying technology
The drying process in a painting/drying cabin
occurs through heat conductance (convection).
When an infrared dryer is used, the drying process
is through heat radiation.
The infrared rays penetrate the air and the paint
layer without warming them. Because the infrared
rays are reflected from the steel panel, the paint
coat is warmed from the inside outwards.
Advantages of infrared drying:
- The drying process occurs from the inside to
the outside.
- The drying time is shorter than for warm air
systems.
- Because the infrared dryer consists of several
cassettes which can be switched on
independently, the drying area can be optimally
controlled.
- Independent of the manufacturer's instructions,
pay attention to the following:
- Flash-off time of the paint before switching on
the infrared dryer.
- Distance between the infrared dryer and the
surface.
- Duration of the irradiation.
The most common use of the infrared dryer is to
dry stopper and primers. The wait time between
the job steps is shortened without having to use
the painting/drying cabin.
The painting/drying cabin can then be used
exclusively for application and drying of topcoat.
There are two types of infrared dryer:
- Infrared dryer with short wavelength radiation.
- Infrared dryer with medium wavelength
radiation.
As an indication, the following drying times are
listed for some materials (at 80 cm distance):
NOTE: Observe the material manufacturer's and
supplier's specifications.
- Polyester stopper 2 minutes.
- Spray stopper 2 to 7 minutes.
- Water based primer-filler 7 to 9 minutes.
- Primer 3 to 8 minutes.
- Top coat 7 to 10 minutes.
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Infrared drying technology