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| POLYVINYL-FORMAL
(FORMVAR TM) |
Class 105°C
Type T |
Description
Polyvinyl-formal is composed of polyvinyl-formal resins, primarily
modified with phenol-formaldehyde resins. It offers good electrical
properties, as well as good abrasion and solvent resistance. This
is the best insulation to use in an oil environment. Size range: 10-30
gauge. |
|
Limitations
Requires mechanical or chemical stripping before soldering. Not
normally stocked in all sizes.
|
| SOLDERABLE POLYURETHANE
(SODEREZE™) |
Class 105°C
Type T |
Description
Solderable polyurethane is primarily composed of polyurethane resins.
It offers excellent electrical properties, as well as good film flexibility,
moisture and chemical resistance. It also provides a high Q factor
in electrical windings, and is a good insulation for use in an oil
environment. Polyurethane may be stripped by solder dipping at temperatures
between 750-800°F. It is normally carried in stock. Size range:
31-44 gauge. |
|
Limitations
It has a lower abrasion resistance than polyvinyl-formal, polyurethane-nylon
or polyester.
|
| SOLDERABLE POLYURETHANE-NYLON
(NYLEZE™) |
Class 130°C
Type B |
Description
Polyurethane-nylon is a two coat application consisting of a base
coat of modified polyurethane resins and a superimposed film composed
of polyamide resins (nylon). It has excellent film flexibility and
abrasion resistance, plus good electrical properties. It may be stripped
by solder dipping at temperatures between 750-800°F. It is normally
carried in stock. Size range: 10-44 gauge. |
|
Limitations
Not recommended for use in hot transformer oil or freon gases.
|
| MODIFIED POLYESTER
WITH A POLYAMIDE-IMIDE OVERCOAT (ARMORED POLYTHERMALEZE 2000™)
|
Class 200°C
Type K |
Description
Modified polyester is a two film insulation consisting of a base coatof
polester-polyimide polymer and an overcoat of polyamide-imide resins.
It offers excellent electrical properties, moisture and solvent resistance,
superior dielectric strength, good film flexibility and abrasion resistance.
Size range: 10-44 gauge. |
|
Limitations
Requires mechanical or chemical stripping before soldeing. Not recommended
for use in oil-filled power and distribution transformers containing
paper or other cellulosic materials.
|
| POLYIMIDE (ML™) |
Class 220°C
Type M |
Description
Polyimide is composed of aromatic polyimide resins. It offers excellent
film flexibility, high dielectric strength, and adequate abrasion
resistance. Size range: 14-30 gauge. |
|
Limitations
Requires mechanical or chemical stripping before soldering. Has
a tendency to solvent craze. Must be annealed thirty to sixty minutes
at 175-200°C before varnish treatment.
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