125μm PET Polyester Film
As a PET Polyester Film Manufacturer, Jinlu Film makes this 125μm grade for applications where 19.5 kV of dielectric strength is the deciding factor. That voltage rating is high enough to replace multi-layer builds in transformers and coils, cutting material and labor at the same time. Just as important, MD thermal shrinkage drops to 0.9% — the lowest among the mid-heavy gauges — so the film stays registered through heat cycles and repeated handling.
Key Specifications
| Thickness | 125μm |
| Material | PET (polyethylene terephthalate) |
| Tensile strength | MD 208 MPa / TD 216 MPa |
| Elongation at break | MD 171% / TD 151% |
| Thermal shrinkage at 150°C, 30 min | MD 0.9% / TD 0.1% |
| Breakdown voltage | 19.5 kV |
| Volume resistivity at 20°C | 3E+17 Ω·cm |
| Dissipation factor at 20°C, 1 kHz | 43 |
| Coefficient of friction | μs 0.6 / μd 0.4 |
Applications
High-voltage interlayer insulation for transformers and chokes, wire and cable wrapping, flexible printed circuits (FPC), membrane switches, die-cut insulation parts, adhesive tape backing, and spiral tube winding.
Target industries: electrical and electronic manufacturing, coil and transformer winding, flexible circuitry, and industrial insulation.
Why Choose Jinlu Film as Your PET Polyester Film Manufacturer
- 19.5 kV breakdown voltage and 0.9% MD shrinkage
- Fewer layers needed in high-voltage builds
- Custom width and roll length
- Fast sampling and dependable lead times
- Export-grade packing and global shipping support
- Factory-direct pricing
Compare With Other Thicknesses
For a thinner film, see 100 μm. For even more voltage, see 188 μm. We also list a 0.125 mm PET film, a 125μm BOPET film, a 125μm PET film for motor insulation and our PET polyester film overview. Everything is in the PET film category. To learn more, read 125μm PET polyester film manufacturer: where higher voltage insulation gets made and the PET insulation film guide.
FAQ
What is the breakdown voltage of 125μm PET polyester film?
19.5 kV, as listed in the specifications above.
Why does low MD shrinkage matter?
Thermal shrinkage of 0.9% MD helps the film stay registered through heat cycles and repeated handling.
Can it replace multi-layer builds?
At 19.5 kV it is high enough to replace multi-layer builds in transformers and coils, cutting material and labor at the same time.
Can I get samples?
Contact us with your width and application, and we will send a quote and samples.
