Polyester Film / Polyester-Fiber Paper Composite (DMD)

Polyester Film / Polyester-Fiber Paper Composite (DMD)
Polyester Film / Polyester-Fiber Paper Composite (DMD)

DMD has good dielectric properties, high heat resistance and mechanical strength. It is suitable for small and medium size of electric machines as slot, backing insulation etc. of “F” class (155°C or 311°F) appliances.

Commonly used in motors, transformers, capacitors, and general electrical insulation applications.

No. Property Unit Value
1 Thickness Nominal thickness mm 0.20 0.25 0.30 0.35 0.40
Mean tolerance ±0.03 ±0.04 ±0.05 ±0.06 ±0.06
2 Tensile force lengthwise kgf ≥18
crosswise ≥15
3 Volume resistivity At room temp. Ω.cm ≥1.0x1012
Water absorption ≥1.0x109
130°C ≥1.0x1010
4 Breakdown strength At room temp. kV/mm ≥40
after bending at 180°C ≥35
130±2°C ≥35
Water absorption ≥30