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Ami
Polymers applies Teflon and other Fluoropolymer coatings by
liquid or powder spray methods using latest coating technologies.
PTFE
and its various copolymers such as PVDF, TEFZEL, HALAR, FEP and
PFA are applied as powder or liquid.
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PVDF
is good up to 120°C. |
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Tefzel/Halar
is good up to 150°C. |
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FEP
is good up to 195°C. |
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PTFE/PFA
is good up to 260° C. |
FEP
(Fluorinated Ethylene Propylene) gives the best non-stick properties
among all Fluropolymers.
A single
coat of:
|
PVDF
can be build up between 150 and 200 microns. |
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Tefzel/Halar
can be build up between 200 to 300 microns. |
|
FEP
can be build up between 75 to 125 microns. |
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PFA
hard coat can be build up between 400 to 500 microns. |
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PTFE
can be build up between 50 to 70 microns. |
The thickness
variation will be 400±100µ, 700±150µ and
1100±200µ
The
parts to be coated have to be brought at the site of
Ami Polymers
as the coating process involves thorough surface preparation, accurate
spraying (clean air) and controlled oven/furnace monitoring.
Later on, if need arises coated parts can be repaired at customers’
site. The repair job at customers’ end will depend on the extent
of damage and kind of damage to the coating.
We follow following coating process steps.
| 1. |
Metal
surface preparation (Write up enclosed) |
| 2. |
Surface
preparation (Grit blasting or glass bead blasting depending
on the thickness of coating to be applied)
|
| 3. |
Applying
primer (different primer for different fluropolymers) |
| 4. |
Air
dry the primer or bake the primer in the oven. |
| 5. |
Spray
the top coat (Fluoropolymer) and cure it in the oven/furnace. |
| 6. |
Repeat
the 5th step till the desired thickness
is attained.
|
Coating
to be applied depend on 1) End use, 2) Chemical involved, 3) Temp.
Condition, 4) Erosion
Full vacuum can be applied in coated vessels.
The Porosity in the coating can be checked either by a spark tester
or Ultrasound tester or Phenolphthalein test as the case may be.
| Guarantee |
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We
offer a guarantee of workmanship & will issue a Certificate
stating the nature of Polymer used. Our recommendation of TEFLON/TEFZEL/KYNAR
as a material of coating based on available technical literature
of the resin supplier and our past experience. However, No Guarantee
can be given regarding performance of the coating in actual
condition due to many factors unknown to us and beyond our control. |
| Delivery |
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After
confirming the material in stock and approving surface preparation,
7 to 20 days depending on the type and thickness of coating
to be applied. |
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