Decoding the Hazy Surface, Dielectric Strength, and High Stiffness of Standard Slot Liner Materials
Product Overview
In the demanding world of electric motor manufacturing, insulation failure is not an option. Engineers require a material that can slide smoothly into stator slots, resist extreme temperatures, and provide absolute electrical insulation. For decades, Lumirror H10 PET Film has been the industry benchmark for motor slot liners and wedge insulation. In this technical review, we analyze the exact properties of H10 and explain why its unique hazy surface and high stiffness make it indispensable for modern electric vehicles and industrial motors.
The Core Engineering Advantages of H10
What makes Lumirror H10 stand out from standard clear polyester films? The data sheet highlights three critical features for motor manufacturing:
- Hazy Surface for Superior Handling: Winding and inserting films into tight motor slots requires friction. H10 features a specially engineered hazy (matte) surface that prevents blocking and provides excellent slip resistance, ensuring the film stays exactly where it is placed.
- High Stiffness: Unlike soft films that bunch up during automated insertion, H10 offers excellent rigidity. It can be pushed into deep slots without buckling or folding over.
- Outstanding Dielectric Strength: From 11.5 kV at 50μm to a massive 39.6 kV at 480μm (nominal 500μm), the film provides reliable electrical insulation for high-voltage EV motors.
Thickness Range and Applications
Lumirror H10 is available in a wide range of gauges to suit different motor sizes and voltage classes:
- Thin Gauges (75μm to 125μm): Used for smaller motors, transformers, and general electrical insulation.
- Heavy Gauges (250μm to 500μm): Used for large industrial motors, EV traction motors, and heavy-duty slot liners and wedges.
Sourcing a Reliable Alternative
While Lumirror H10 is an exceptional product, global supply chain managers often look for a Lumirror H10 Alternative to reduce costs and secure stable lead times. To successfully replace H10, a manufacturer must replicate the specific haze level for handling and maintain strict control over thermal shrinkage and breakdown voltage.
Technical Characteristics
The following values represent the typical capabilities of our equivalent Motor Insulation PET Film range:
- Material: Hazy Biaxially Oriented Polyethylene Terephthalate
- Available Thickness: 50 μm to 500 μm
- Breakdown Voltage: 11.5 kV up to 39.6 kV (depending on gauge)
- Tensile Strength (at 75μm): MD 244 MPa / TD 249 MPa
- Thermal Shrinkage at 150°C, 30min: MD 0.9% to 1.7% / TD 0.4% to 0.8%
- UL746B: RTI Electrical 105°C, Mechanical 105°C
Why Choose Jinlu Film as Your Supplier
Jinlu Film is a leading manufacturer of Motor Insulation Film. We offer a direct factory substitute for the Lumirror H10 series, providing the same hazy surface for handling and high dielectric strength for motor safety. Whether you need 75μm for a small appliance or 350μm for heavy machinery, we offer factory-direct pricing, custom slitting, and reliable global shipping.
Contact us today for a factory quote, technical data, or a sample of our Motor Insulation PET Film.
