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SynTherm® – Insulating Materials

SynKraft® EP grained

SynKraft® EP is a grained 2-layer insulation constructed from polyester film with high grade press board on one side. This composite material is suitable for class B (130 °C).


By stamping the press board the material achives a good suppleness and extensibility. At the same time it maintains its stability.

The minimum stability is required for in-serting the phase insulation between the windings. The suppleness allows protection against mechanical stress on deformation of the end of turns.


Mainly as phase insulation in stators.

Delivery forms

Original rolls with approx. 600 mm width or slit rolls

Technical data
Nominal thickness before grain  Nominal thickness after grain  Film thickness  Weight  Specific weight  Specific weight tolerance  Tensile strength longitudinal  Tensile strength transversal  Elongation at break longitudinal  Elongation at break transversal 
Unit of measure    
approx. mm  0.15 0.25
approx. mm  0.38 0.48
µm  23 23
m²/kg  5.3 3.3
g/m²  190 300
± 12 ± 12
N/10 mm  ≥ 90 ≥ 175
N/10 mm  ≥ 70 ≥ 110
≥ 3 ≥ 3
≥ 10 ≥ 10
Nominal thickness  Dielectric strength 
Unit of measure    
mm  0.15 0.25
kV  ≥ 4 ≥ 4

SynKraft® is a registered trademark of SynFlex.