Ij

FIBER & TAPE INSULATIONS

Recommended Max.

Operating Temperature

Advantages

Limitations

Insulation

1. Poor space factor compared

1. Low cost serving.

to Nylon or Celanese.

2. Good resistance to

105°C

Cotton

2. Non-solderable.

abrasion.

1. Good space factor.

1. Hygroscopic

2. Excellent abrasion resistance.

155°C

Nylon

3. Solderable.

1. Better space factor than

1. Good abrasion resistance.

Cotton or Glass but

2. Solderable.

Dacron^®

155°C

poorer space factor than

3. Slightly higher maximum

(POLYESTER)

Nylon.

operating temperature

than nylon.

1. Non-solderable.

1. Good space factor.

Nomex^®

2. Higher cost than other

2. Good electrical properties

(HI-TEMP Aramid)

250°C

fibers.

at high temperatures.

1. Good electrical properties

1. Space factor equivalent

at high temperatures.

to Cotton.

Glass

260°C

2. Non-solderable.

Recommended Max.

Tape Insulation

Use Temperature

Characteristics

Polyester (PET)

1. High dielectric strength.

Mylar^®

2. Good abrasion often used as binder or moisture barrier under

135° C

(heat sealable

extruded jackets and textile serves or braids.

grades available)

1. Excellent thermal properties.

Nomex^®

200° C

2. Excellent electrical properties.

(aromatic polyamide)

(Up to 220° C under

3. Excellent compatibility with varnishes, adhesives and

certain conditions.)

transformer fluids.

4. Thinner grades are flexible.

5. Good resistance to tearing and abrasion.

Ver y high dielectric strength.

1.

Polyimide

240° C

2.

Ver y good chemial resistance.

Kapton^®

(Up to 400° C under

3.

UL 94 V-0 flame rating.

(Heat sealable & adhesive

cer tain conditions.)

Excellent mechnical properties.

4.

grades available)

1.

Excellent electrical properties at high temperatures.

Ultimate operating

Fiberglass Cloth

2.

Conformable.

temperature determined

Varnish compatible grades available.

3.

by application &

4.

Excellent solvent resistance.

glass type.

1. Excellent electrical properties at high temperatures.

Ultimate operating

Mica

2. Flame resistant.

temperature determined

3. Retains useful electrical properties during & after exposure

by application &

to fire.

glass type.

NOTE: Dacron^®, Nomex^®, Mylar^® and Kapton^® are DuPont Registered Trademarks.

w w w. n e w e n g l a n d w i r e . c o m

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© 2005 New England Wire Technologies

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