Polyurethane Powder Coating
General Introduction:
Powder coatings made of hydroxyl polyester resin, with excellent chemical properties, and very good decorative, leveling, chemical resistance, weather resistance and strong oil resistance. It is suitable for the metal appearance coating of bicycle, automobile, motorcycle, refueling machine and agricultural machinery with high requirement of chemical resistance and oil resistance.
Product Series:
to provide highlights (80% above), semi-light (50-80%), plain glass (20-50%) and no- light (20% below) products or on requirements
Physical Properties:
Specific gravity(g/cm3, 25℃): 1.4-1.7
Particle size distribution: 100 % less than 100 micron (It can be adjusted according to the special requirements of coating)
Construction Conditions:
Pretreatment: different pretreatment for different substrates (phosphating treatment, noise spraying treatment, shot peening treatment)
Curing mode: manual or automatic static gun construction
Curing conditions: 200℃(workpiece temperature), 10 minutes
Coating performance:
|
Testing item |
Inspection standard or method |
Test indicators |
|
impact resistance |
ISO 6272 |
50kg.cm |
|
cupping test |
ISO 1520 |
8mm |
|
adhesive force(row lattice method) |
ISO 2409 |
0 level |
|
bending |
ISO 1519 |
2mm |
|
pencil hardness |
ASTM D3363 |
1H-2H |
|
salt spray test |
ISO 7253 |
>500 hours |
|
hot and humid test |
ISO 6270 |
>1000 hours |
|
heat resistance |
150℃/24 hours (white) |
excellent light retention, color difference≤0.3-0.4 |
Notes:
1.The above tests used 0.8mm thick cold-rolled steel plates with a coating thickness of 50-70 microns.
2.The performance index of the above coating may change with the change of color and gloss.
Average coverage:
9-11 sq.m./kg; film thickness 60 microns (calculated with 100% powder coating utilization rate)
Packing and transportation:
cartons are lined with polyethylene bags, net weight is 20kg; Non-hazardous materials can be transported in various ways, but only to avoid direct sunlight, moisture and heat, and avoid contact with chemical substances.
Storage Requirements:
Clean, dry, ventilated, away from light, room temperature below 30℃, and should be insulated from fire source, away from heat source.Effective storage period is 12 months from the date of production. Avoid stacking more than 4 layers.
Notes:
All powders are irritating to the respiratory system, so avoid inhaling powder and steam from curing. Try to avoid direct contact between skin and powder coating. Wash skin with water and soap when contact is necessary. If eye contact occurs, wash skin immediately with clean water and seek medical attention immediately. Dust layer and powder particle deposition should be avoided on the surface and dead corner. Tiny organic particles will ignite and cause explosion under static electricity. All equipment should be grounded, and construction personnel should wear anti-static shoes to keep the ground to prevent static electricity.
