Understanding 250μm PET Film: Dielectric Strength, Thermal Stability, and Real-World Applications
Product Overview
Choosing the right insulation film often comes down to thickness. 0.25mm PET Film is a heavy-gauge polyester film designed for applications where electrical safety and mechanical durability cannot be compromised. At 250μm, this film offers high breakdown voltage and strong dimensional stability, making it suitable for demanding industrial insulation and converting processes.
Technical Characteristics
The following values are typical data measured under specified test conditions.
- Thickness: 250 μm
- Tensile Strength: MD 177 MPa / TD 177 MPa
- Elongation at Break: MD 193% / TD 157%
- Thermal Shrinkage at 150°C, 30min: 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, 1kHz: 43
- Coefficient of Friction: Not specified for this thickness
- UL746B: RTI Electrical 105°C, Mechanical 105°C
Key Properties
- High breakdown voltage for heavy-duty insulation
- Balanced tensile strength in both MD and TD directions
- Stable thermal shrinkage for reliable processing
- Excellent dimensional stability for thick-film applications
Applications
0.25mm PET Film is widely used in electrical insulation such as flyback transformers (FBT), choke coils, wire insulation, and cable tape. It is also suitable for flexible printed circuits (FPC), membrane switches, die cut insulation parts, mold release, adhesive tape, and spiral tubes.
Why Choose Us
We supply 0.25mm PET Film with consistent thickness, reliable dielectric performance, and flexible order support. Custom slitting is available to meet different production requirements.
Contact us today for a quotation or sample of 0.25mm PET Film.
