How 23μm PET Film Balances Thin-Gauge Handling with Reliable Dielectric Performance
Product Overview
Thin films often force a trade-off between handling and insulation. The 25μm PET Polyester Film avoids that. At a nominal 25μm (actual 23μm), it delivers a 7.5 kV breakdown voltage, which is high for a film this thin. Tensile strength stays at 215 MPa MD and 221 MPa TD, so it holds up under tension during winding and converting. Thermal shrinkage is 1.2% MD and just 0.1% TD, giving it good dimensional stability for precision work.
Technical Characteristics
The following values are typical data for the 25μm (nominal) specification. They are not intended as limiting specifications.
- Material: PET (Polyethylene Terephthalate)
- Thickness: 23 μm (nominal 25μm)
- Tensile Strength: MD 215 MPa / TD 221 MPa
- Elongation at Break: MD 170% / TD 165%
- Thermal Shrinkage at 150°C, 30min: MD 1.2% / TD 0.1%
- Breakdown Voltage: 7.5 kV
- Volume Resistivity at 20°C: 2E+17 Ω·cm
- Dissipation Factor at 20°C, 1kHz: 39
- Coefficient of Friction: μs 0.6 / μd 0.4
Key Properties
- High breakdown voltage relative to film thickness
- Balanced tensile strength in MD and TD
- Low TD shrinkage for dimensional stability
- Good handling for thin-gauge winding and converting
Applications
25μm PET Polyester Film is used for thin electrical insulation, flyback transformers (FBT), choke coils, wire insulation and cable tape, flexible printed circuits (FPC), membrane switches, die-cut electrical insulation, and spiral tube converting. Target industries include electrical and electronic manufacturing, transformer and coil winding, and flexible circuitry.
Why Choose Jinlu Film
We supply 25μm PET Polyester Film with consistent thickness, stable dielectric performance, and reliable tensile strength. Width and roll length are customizable, with export-grade packing and global shipping support. Factory-direct pricing keeps your cost competitive.
Contact us today for a free quote and samples of 25μm PET Polyester Film.
