Polyurethane powder coatings

 

General introduction
This type of powder coating is prepared from polyurethane resin . It has excellent leveling property and good resistance to chemicals, elements and oil. It can be applied in the coating on hard conditions, such as the coating for automobiles, motors, oiling machines and agricultural implements and machinery,
Product Series
Products of different gloss are available, high gloss (above 80%), semi gloss(50-80%), flat gloss(20-50%) and no gloss(below 20%). (The gloss can be adjusted according to the customers’ to the demand.)
Physical properties of the powder 
Density(g/cm3,25℃):1.4-1.7
Granularity distribution:100%below 100μm(it can be adapted to the customers’ demand)
Curing Condition
 200℃(workpiece temperature), 10minutes 
Average coating rate
9-12㎡/kg, film thickness:60μm (calculated according to 100% consuming of powder coating)
Coating performance

Testing items
Standards and methods
Inspecting index
Impact strength
GB/T 1732-1993
50kg.cm
 
ERICHSEN TEST
GB 9753-1988
8mm
 
Adhesion(CHECKED TEST)
GB/T 9286-1998
Grade0
Bending resistance
GB 6742-1986
2mm
 
Pencil hardness
GB/T 6739-1996
F-H
Salt mist resistance
GB 1771-1991
>500h
Heat & moisr resistance
GB 1740-1989
>1000h
Heat resistance
100℃×24h(white color)
Good gloss retention, Aberration≤1
Resistance to elements(accelerated aging test)
60℃×8h under UV+50℃×4h condensation, the process was cycled for 500h
Gloss retention≤2
aberration≤2
Notations
The tests above used the cold rolling steel plate of 0.8mm thick with preceding standard treatment. The thickness of the coaring layer is 60-80μm
2. The above property index may slightly vary with the variation of the color and gloss .标记机


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