Formvar is a synthetic enamel composed of polyvinyl acetal and phenolic resins.
Formvar's hot oil resistance sets it apart from all other magnet wire insulations. The flexibility, adhesion and abrasion scrape resistance of Formvar film is excellent. Its electrical properties are very good and it is resistant to common solvents. While Formvar has been replaced in many applications, Formvar continues to be the recommended film insulation most commonly used in oil-filled transformers.
Typical Applications
Formvar's hot oil resistance sets it apart from all other magnet wire insulations. The flexibility, adhesion and abrasion scrape resistance of Formvar film is excellent. Its electrical properties are very good and it is resistant to common solvents. While Formvar has been replaced in many applications, Formvar continues to be the recommended film insulation most commonly used in oil-filled transformers.
Typical Applications
- Oil-filled transformers
- Motors
- Random wound coils
- Solenoids
Unit of Measure
Specifications
UL Listing |
N/A UL Recognized Class 105 Product |
Mil-Spec No. |
N/A MW 15-C/A |
AWG Size |
N/A 26 |
Min. Bare Wire Diameter |
N/A 0.0157 in0.399 mm |
Nom. Bare Wire Diameter |
N/A 0.0159 in0.404 mm |
Max. Bare Wire Diameter |
N/A 0.0160 in0.406 mm |
Min. Increase in Diameter Due to Film Coating |
N/A 0.0009 in0.023 mm |
Min. Overall Diameter of Film-Coated Wire |
N/A 0.0166 in0.422 mm |
Max. Overall Diameter of Film-Coated Wire |
N/A 0.0173 in0.439 mm |
