0.25mm PET Film
0.25mm is a high-voltage grade among our standard polyester films. This grade delivers a 28.0 kV breakdown voltage and 4E+17 Ω·cm volume resistivity, combined with a 250μm body that resists compression, punctures, and deformation during winding and assembly. If your application needs a film that can both insulate and physically support, this is the one.
Key Specifications
| Thickness | 250μm |
| Tensile strength | MD 177 MPa / TD 177 MPa |
| Elongation at break | MD 193% / TD 157% |
| Thermal shrinkage at 150°C, 30 min | MD 1.0% / TD 0.7% |
| Breakdown voltage | 28.0 kV |
| Volume resistivity at 20°C | 4E+17 Ω·cm |
| Dissipation factor at 20°C, 1 kHz | 43 |
Applications
High-voltage electrical insulation, transformer and choke coil insulation, wire and cable tape, flexible printed circuits (FPC), membrane switches, die-cut insulation parts, mold release, adhesive tape, and spiral tube converting.
Target industries: electrical and electronic manufacturing, transformer and coil winding, power supply, flexible circuitry, and heavy-duty industrial insulation.
Why Choose Jinlu Film
- High breakdown voltage with stable batch-to-batch performance
- Custom width and roll length
- Consistent surface quality for smooth converting
- Export-grade packing and global shipping support
- Factory-direct pricing
Compare With Other Thicknesses
For thinner film, see 0.188 mm. For the highest breakdown voltage in the standard range, see 0.35 mm. We also list a 250μm BOPET film and a 250μm PET film for motor insulation. Everything is in the PET film category. To learn more, read 0.25mm PET film: a buyer’s guide to thick polyester film for heavy insulation, 250μm BOPET film: structural-weight polyester film for demanding converting and the PET insulation film guide.
FAQ
What is the breakdown voltage of 0.25mm PET film?
28.0 kV, as listed in the specifications above.
When should I choose 0.25mm?
When your application needs a film that can both insulate and physically support, resisting compression, punctures and deformation during winding and assembly.
Can you customize width and roll length?
Yes. Custom width and roll length are available.
Can I get samples?
Contact us with your width and application, and we will send a quote and samples.
