Outdoor Ral Color Polyurethane Powder Coating For Construction Aluminum Profile

It is made of epoxy resin, polyester resin, pigment, filler and anti-yellowing additives
through melting, extruding, grinding and processing.

Main
features

The gloss can be adjusted within 5-60% (60°);
Good anti-yellowing performance;
Good physical and mechanical performance and resistance to chemicals and heat.

It is applicable to the coating of household appliances, instruments, meters, light industrial products,
office equipment, library equipments and electromechanical equipment with relatively
high requirements.

Product
series

Technical

indexes

The paint film should be smooth but slight orange peel is allowed
and the color should meet the color difference specified.

Surface
preparation

The corresponding treatment method should be used based on the substrates, such as phosphating,
chromizing, shot blasting or blast cleaning
1. The surface roughness should be 30 ~75 μm if reaching Grade Sa2.5 by shot blasting
or blast cleaning.
2. Phosphating: degreasing- derusting- neutralizing- surface control- phosphating- passivating
Appearance of phosphating film: The phosphating film should be crystallized densely,
continuously and evenly.
3. Chromizing: degreasing- rinsing- immersion cleaning- deoxidating- rinsing- chromizing

Method of
Application

It is applicable to high voltage electrostatic spraying
Spraying voltage: 50-90 kV; air pressure for spraying: 0.1-0.2 Mpa;
distance between the gun and workpiece: 200-300 mm
Curing condition: 180℃/15-20 minutes or customized according to customers’ requirements.
Additional coating: different measures should be taken for the specific conditions:
1. If the requirements are not high, paints with the same color can be used for additional coating;
2. In case of high requirements, spraying and curing should be made after polishing the omitted part
with sand paper and spraying the whole surface.