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Litz Fiber & Tape Insulations
Insulation |
Recommended Max.
Operating Temperature |
Advantages |
Limitations |
Cotton |
105°C |
- Low cost serving.
- Good resistance to abrasion.
|
- Poor space factor compared to Nylon or Celanese.
- Non-solderable.
|
Nylon |
155°C |
- Good space factor.
- Excellent abrasion resistance.
- Solderable.
|
|
Dacron® (POLYESTER) |
155°C |
- Good abrasion resistance.
- Solderable.
- Slightly higher maximum operating temperature than Nylon.
|
- Better space factor than Cotton or Glass but poorer space factor than Nylon.
|
Nomex® (HI-TEMP Aramid) |
250°C |
- Good space factor.
- Good electrical properties at high temperatures.
|
- Non-solderable.
- Higher cost than other fibers.
|
Glass |
260°C |
- Good electrical properties at high temperatures.
|
- Space factor equivalent to Cotton.
- Non-solderable.
|
Tape Insulation |
Recommended Max.
Use Temperature |
Characteristics |
Polyester (PET) Mylar® (heat sealable grades available) |
135°C |
- High dielectric strength.
- Good abrasion often used as binder or moisture barrier under extruded jackets and textile serves or braids.
|
Nomex® (aromatic polyamide) |
200°C
(Up to 220°C under
certain conditions.) |
- Excellent thermal properties.
- Excellent electrical properties.
- Excellent compatibility with varnishes, adhesives and
transformer fluids.
- Thinner grades are flexible.
- Good resistance to tearing and abrasion.
|
Polyimide Kapton® (Heat sealable & adhesive grades available) |
240°C (Up to 400°C under certain conditions.) |
- Very high dielectric strength.
- Very good chemial resistance.
- UL 94 V-0 flame rating.
- Excellent mechnical properties.
|
Fiberglass Cloth |
Ultimate operating
temperature determined
by application &
glass type. |
- Excellent electrical properties at high temperatures.
- Conformable.
- Varnish compatible grades available.
- Excellent solvent resistance.
|
Mica |
Ultimate operating
temperature determined
by application &
glass type. |
- Excellent electrical properties at high temperatures.
- Flame resistant.
- Retains useful electrical properties during & after exposure to fire.
|
NOTE: Dacron®, Nomex®, Mylar®and Kapton®are DuPont Registered Trademarks.
|