Film insulations

Insulation

Temperature Rating

AWG Sizes Available

Advantages

Limatations

Polyvinyl Formal (Formvar)

J-W-1177/4

Class 105

Type T

MW15-C

10 - 30

  1. Very good resistance to abrasion and solvents.
  2. Good electrical properties.
  1. Must be stripped before soldering.

Polyurethane

J-W-1177/41

Class 155

Type SPU

MW79-C

30 - 44

  1. Solderable at 750 to 800.
  2. Good film flexibility.
  3. Good moisture and chemical resistance.
  4. Excellent electrical properties, contributing to the manufacture of high "Q" coils.
  1. Lower abrasion resistance than Polyvinyl Formal, Polyurethane with Nylon overcoat or Polyester, Polyester-amide-imide.

Polyurethane with Nylon overcoat

 

 

 

 

 

J-W-1177/42

Class 155

Type SPUN

MW80-C

J-W-1177/9

Class 130

Type SUN

MW28-C

25 - 44

 

 

 

10 - 24

  1. Solderable at 750 to 800.
  2. Excellent film flexibility and abrasion resistance.
  3. Good electrical properties.
  1. Not recommended for use in hot transformer oil freon gases.

Polyester-imide Solderable

J-W-1177/39

Class 180

Type SPEI

MW77-C

26 - 40

  1. Solderable at 800 to 850.
  2. Good electrical properties.
  3. Compatible with most varnishes and solvents.
  1. Lower abrasion resistance than Polyurethane with Nylon overcoat or Polyester-amide-imide.
  2. Not recommended for use in hot transformer oil or freon gases.

Polyester with Polyamide-imide overcoat

 

Polyester-amide-imide

J-W-1177/14

Class 200

Type K

MW35-C

J-W-1177/43

Class 200

Type PEAI

MW74-C

10 - 44

  1. Good flexibility and abrasion resistance (windability).
  2. High solvent resistance.
  3. Superior dielectric strength.
  4. Excellent electrical properities and excellent moisture resistance.
  1. Not recommended for use in oil-filled power and distribution transformers containing paper or other cellulosic materials.
  2. Must be stripped before soldering.

Polyimide (ML)

J-W-1177/15

Class 220

Type M

MW16-C

12 - 30

  1. Excellent flexibility.
  2. Adequate abrasion resistance.
  3. High dielectric strength.
  1. Will solvent craze.
  2. Must be annealed 30 to 60 minutes at 175 to 200 before varnish teatment.
  3. Must be stripped before soldering.



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