Electrical Insulation Film for Motors

Electrical Motor Insulation Film(motor film) is a high-performance polymer film designed to provide electrical insulation, thermal resistance, and mechanical durability in electric motor applications. Commonly made from PET (polyester), polyimide, or PEN materials, this film is widely used for slot liners, phase insulation, and coil wrapping in low- to high-voltage motors.

Features:

Excellent Dielectric Strength: Prevents short circuits and arcing in tight winding spaces.
High Thermal Resistance: Available in Class B (130°C), Class F (155°C), or Class H (180–220°C) grades for long-term heat exposure.
Mechanical Flexibility: Conforms easily to motor slot shapes and resists tearing or deformation.
Dimensional Stability: Maintains structure under mechanical stress and high temperatures.
Chemical & Moisture Resistance: Performs reliably in humid, oil-filled, or chemically active environments.

Applications:

Slot liner and phase insulation in AC and DC motors, Interlayer insulation in motor windings, Coil wrapping and protection in electric compressors, Die-cut insulation parts for EV motors and industrial drives, Generator and transformer insulation systems.

Additional Documents:

Electrical Insulation Film for Motors (TDS)

Adhesive Tapes Selection Guide

Technical data

Product model / Technicl Parameters	P111-125	P111-188	P111-250
Total thickness[mm]	0.125	0.188	0.25
Thermal shrinkage（MD）[%]150℃,30min	1.0	1.0	1.0
Thermal shrinkage（TD）[%]150℃,30min	0.6	0.6	0.6
Tensile strength（MD）[MPa]	200	190	180
Tensile strength（TD）[MPa]	190	190	180
Elongation At Break（MD）[%]	150	170	190
Elongation At Break（TD）[%]	160	160	160
Power frequency electrical strength[V/µm]	80	70	60
Relative permittivity 50Hz	3.3	3.3	3.3
Surface insulation resistance [ Ω ]	3.0×10¹⁵	3.0×10¹⁵	3.0×10¹⁵
The dielectric dissipation factor is 50Hz	2.3×10^-3	2.3×10^-3	2.4×10^-3
volume resistivity [ Ω·cm ]	1.4×10¹⁴	1.4×10¹⁴	1.4×10¹⁴

Legal Disclaimer

The values given are typical values, and do not constitute a specification. We recommend testing the suitability of the self-adhesive tape for the designated application or use. Please contact us or e-mail info@ysdiecut.com to determine product availability.

OEM: Delivers tailor-made adhesive tape products and die-cut components under your brand specifications—designed to integrate seamlessly into your end products.

ODM: Tape ODM (Original Design Manufacturing) refers to a service model where designs, develops, and manufactures ready-to-sell adhesive tape products that can be branded and marketed under your own label.

Tapes Manufacturer
Yousan New Materials

Storage
It is recommended to store in a clean and dry place, away from direct sunlight to prevent damage to the packaging, and to avoid storing with volatile solvents. Store at 25±5°C and humidity at 50±5%.