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Technical Information ... |
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4 How to apply
COLOUR
Flair®
Powder Coatings »»
4
COLOUR
Flair®
Powder Coatings Product Specifications »»
4 Properties of
COLOUR
Flair®
Powder Coatings Powders »»
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| How to
Apply COLOUR
Flair®
Powder Coatings |
Pretreatment
The surface to be coated is cleaned by removing dirt, oil, grease or mill scales. Generally, the surface is then pretreated to produce phosphate conversion coatings. On galvanized substrates zinc phosphate or chromate coating is recommended. Alluminium substrates may require 7 stage chromate conversion coating to achieve maximum protection.
Application Methods
After surface treatment the powder is deposited on the article by any of the following four methods
1. Electrostatic spray guns
2. Electrostatic fluidised beds
3. Fluidised beds
4. Tribo guns
The most widely used method of applying the powder is by electrostatic spray guns (Corona). It is based on the principle whereby powder particles transported by air pressure to the spray head of a dispensing gun, receive an electrostatic charge, and any grounded or earthed substrate in the path of the projected powder attracts and retains the particles by electrostatic adhesion.
Stoving
The coated object is then moved into an oven where the surface temperature is raised to the specified level and maintained for a specific time duration. Here the particles melt, fuse and harden into a tough adherant film. The stoving schedule of COLOURFlairs Powder Coatings varies with the type of the powder used.
· COLOURFlairs Epoxy Powders : 15 mints. @ 185 0C and 10 mints. @ 200 0C
· COLOURFlairs Hybrid Powders : 10 mints. @ 180 0C
· COLOURFlairs Pure Polyester Powders : 10 mints. @ 200 0C
Storage
COLOURFlairs powder coatings should be stored in a cool dry place. The shelf life of the powder is 6 months when stored at 250C.
Packing
COLOURFlairs powder coatings are packed in 15 kg (5 kg. x 3 bags) & 5 kg. corrugated boxes.
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| COLOUR
Flair®
Powder Coating Product Specification |
| Sr. No. |
Application Details |
Hybrid Series |
Epoxy Series |
Pure Polyester Series |
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1 |
Applicable Substrate |
Alluminium, CRCA steel, MS. |
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2 |
Surface preparation |
Degreasing, chemical cleaning in 7 tank process. For Alluminium - Chromodizing. For Steel - Phosphating. |
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3 |
Recommended film thickness |
50 - 60 microns |
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4 |
Curing schedule |
1800 C for 10 minutes (Object Temperature) |
1850 C for 15 minutes (Object Temperature)
2000 C for 10 minutes (Object Temperature) |
2000 C for 10 minutes (Object Temperature) |
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| Properties
of COLOUR
Flair®
Powder Coatings Powders |
| Sr. No. |
Properties |
Hybrid Series |
Epoxy Series |
Pure Polyester Series |
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1 |
Specific Gravity |
1.50 to 1.70 depending upon shade |
1.6 to 1.73 depending upon shade |
1.5 to 1.7 depending upon shade. |
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2 |
Coverage per Kg |
12.50 sq meter at 50 micron DFT at 100% Efficiency. |
11 to 12.5 sq meter at 50 micron DFT at 99%Efficiency. |
13 sq meter at 50 micron DFT at 99%Efficiency. |
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3 |
Storage |
6 Months at 250 C at 50% relative humidity. |
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