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We
are Agents in South Africa for RAPID COAT Powders used in the
powder coating process. We can supply most colours of powder you
may need in the different ranges. Below is general information
on the powders but please feel free to contact us should you require
any futher information.
Guideline to General Properties of Different Chemistries
of Powder Coatings
Type
of Powder |
Curing
Cycle |
Surface
Hardness |
Flexibility
|
OverBake
Heat
Resistance |
Chemical
Resistance |
Weathering
Resistance |
Salt
Spray Resistance |
Epoxy |
190ºC |
5 |
4 |
2 |
5 |
2 |
5 |
Hybrid
E.P. |
180º C |
4 |
5 |
3 |
3 |
3 |
4 |
Polyster
TGIC |
200º C |
4 |
5 |
5 |
3 |
5 |
3 |
Faster curing powders can be offered.
Click
here for our shade cards
Guidelines
EPOXY These are used where the application is indoors, away from
direct sunlight and where chemical resistance is required .The
coating is smooth with no orange peel. Most low gloss finishes
are based on this.The curing schedule is normally 12 to15 minutes
@ 190-200ºC metal temperature.
Click for Shade Card
HYBRID (Epoxy-Polyester) : These are general purpose coatings
where a limited amount of exposure to sunlight is experienced.
They have all round generally good properties. The coating has
slight orange peel. Most glossy finishes are based on this.The
curing schedule is normally 12 to15 minutes @ 170-180ºC metal
temperature.
Click for Shade Card
POLYESTER Good for out door use where considerable amount of sunlight
is present. They have good weathering and mechanical properties
and resistance to over baking. The surface finish has higher orange
peel. TGIC is used as a hardener. It is used for glossy and semi
glossy finishes.
The cure schedule is normally 12 to15 minutes @ 180-190ºC metal
temperature.
Pure Polyester TGIC Free can be offered for countries where use
of TGIC is not permitted.
Good Procedures & Practices For Producing Trouble Free Coatings.
Maintain a clean & dust free atmosphere and work area. Ensure
that the gun and booth are clean before commencing work.
Inspect work area, eliminate possibilities of accumulated dirt
on roofing structures and other equipment from blowing or falling
on work place.
Do not mix powders from two different suppliers / manufacturers.
Careful attention should be given to having clean, dry, oil free
compressed air supply, at the recommended pressure.Periodically
drain off water from the compressor tank and flush the airline
dry.
Clean sieved reclaimed powder should be
mixed in small proportionate quantities, as the work progresses,
and not allowed to accumulate and collect the dirt and moisture.
Always store powder in a closed sealed container and in a cool
and dry place. The powder should not be left in the equipment
for long periods when not being used.
Good earthing of job and equipment are very essential.
Check that the pre-treatment chemicals are in good condition and
of the correct strength. Remove the sludge accumulated at the
bottom of the tanks.
Give due attention to surface pre-treatment of piece. Ensure
that the job is duly cleaned of surface contaminants, blow holes
and cavities are filled and finished, de-greased, de-rusted, passivated,
phosphated / chromated and duly passivated and dried. Particularly
in the case of castings greater care is required for cleaning
out the blow holes/ porous surfaces. After pre-treatment ensure
that dirt and dust does not settle on the job, and it is coated
and cured at the earliest.
Metallic powders should be used with the charging voltage set
to minimum.
The coated articles on this card are representative only and may
vary slightly in actual gloss, color, and texture. We do not accept
any responsibility for variation.
We encourage you to test the product in order to determine suitability
for your specific needs. Since the conditions of product application
are beyond our control, no warranty is expressed.
In practice, discrepancies may be experienced duo to coating thickness,
different substrates, application equipment and curing conditions.
To maintain appearance of metallic finishes, a clear top coat
is recommended.
Rapid endeavors to stock all products shown. However, we may add
or delete products form our inventory/product range as market
conditions demand.
Additional Chemistries Available :
Anti-grass powders, Heat resistant powders upto 600oC, Wet look
powders with high distinction of image.
Also Available :
RAL-shades as per RAL 840-HR & RAL 841 GL and as per INDIAN
STANDARD IS 5:1994
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