250μm PET Film for Motor Insulation
250μm PET Film for Motor Insulation from Jinlu Film is a heavy-gauge hazy polyester film designed for traction motors and heavy-duty industrial generators. At this thickness, the film delivers a massive 27.5 kV breakdown voltage, allowing engineers to significantly reduce the number of insulation layers required in high-voltage windings. Despite its thickness, it retains a 190% MD elongation, meaning it can absorb severe mechanical stress during heavy winding without cracking or tearing.
Key Specifications: Thickness 250μm; Surface hazy / matte; Tensile Strength MD 189 MPa / TD 189 MPa; Elongation at Break MD 190% / TD 156%; Thermal Shrinkage at 150°C, 30min MD 1.1% / TD 0.6%; Breakdown Voltage 27.5 kV; Volume Resistivity at 20°C 4E+17 Ω·cm; Dissipation Factor at 20°C, 1kHz 45; UL746B RTI Electrical 105°C / Mechanical 105°C.
Applications: heavy-duty motor slot liner, traction motor wedge, die-cut insulation, interlayer insulation in large generators, and general high-voltage electrical insulation. Target Industries: heavy electric motor manufacturing, traction motor assembly, power generation, and heavy industrial insulation.
Why Choose Jinlu Film for PET Film for Motor Insulation: 27.5 kV breakdown voltage for extreme high-voltage applications; 190% MD elongation for tough winding processes; thick gauge provides ultimate structural support; UL746B RTI 105°C electrical / mechanical; custom width and roll length; export-grade packing and global shipping support.
