PET Insulation Film
PET insulation film is a biaxially oriented polyester film engineered for electrical insulation. It combines high dielectric strength, low dissipation factor, and excellent dimensional stability, so it performs reliably inside motors, transformers, capacitors, and flexible circuits where failure is not an option. The surface is smooth and uniform, making it easy to slit, punch, and laminate.
Key Specifications
| Material | PET (polyethylene terephthalate) |
| Dielectric strength | High |
| Volume resistivity | Excellent |
| Dissipation factor | Low |
| Thermal stability | Good |
| Surface | Smooth and uniform |
| Width | Custom slitting |
| Roll length | Made to order |
| Core | 3″ or 6″ |
Applications
Electrical insulation for motors and generators, transformer and choke coil insulation, capacitor dielectric, flexible printed circuits (FPC), membrane switches, wire and cable wrapping, and slot liners.
Target industries: electrical and electronic manufacturing, motor and transformer winding, power supply, automotive electronics, and industrial insulation.
Why Choose Jinlu Film
- Stable electrical and mechanical performance batch to batch
- Custom thickness, width, and roll length
- Consistent surface quality for reliable converting
- Export-grade packing and global shipping support
- Factory-direct pricing
Choose Your Thickness
Each thickness has its own page with full electrical data. In PET polyester film: 12 μm, 25 μm, 38 μm, 50 μm, 75 μm, 100 μm, 125 μm and 188 μm. In PET film: 0.125 mm, 0.188 mm, 0.25 mm and 0.35 mm.
For Motors and Transformers
See our PET motor insulation film and the 125 μm PET film for motor insulation. Everything is in the PET film category.
Insulation Film Guides
- PET insulation film: a complete guide to thickness, dielectric strength and applications
- PET motor insulation film for slot liners: what to know before you source
- Toray Lumirror H10 PET film for motor insulation
- Toray Lumirror S10 datasheet explained
FAQ
What is PET insulation film used for?
Electrical insulation inside motors, generators, transformers, capacitors and flexible circuits, as well as wire and cable wrapping and slot liners.
How do I choose a thickness?
Thicker films generally have a higher breakdown voltage. Each thickness page lists its electrical data, and our guide explains how thickness and dielectric strength relate.
What core sizes are available?
3 inch or 6 inch cores, with custom roll length and custom slitting.
Can I get samples?
Contact us with your thickness, width and application, and we will send a quote and samples.
