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SynTherm® – Insulating Materials

SynTherm® DMD

SynTherm® DMD is a flexible 3-ply insulating material made of polyester film covered with a layer of impregnated fleece on both sides.

Attributes

SynTherm® DMD is a Class F (155 °C) insulating material and has a high dielectric and high mechanical strength. It is tough and flexible.
This allows for easy insertion into the slot and the spreading effect ensures a sturdy grip. The smooth surface makes SynTherm® DMD ideal at automatic insulating and insertion machines. Additionally, it provides excellent adhesion in conjunction with impregnating materials.
The outer cured resin impregnation protects the polyester film against oxidation and hydrolysis.

Application

SynTherm® DMD is used as slot insulation and for pre-shaped wedges in electric motors. Due to its special surface qualities it is also used as phase insulation. SynTherm® DMD is commonly used as core, interlayer und final insulation for the production of transformers.

Standards
  • Class F insulating material (155 °C)
  • UL approved, e.g. E247773
  • RoHS-compliant acc. 2011/65/EU
  • Test standard IEC 60626-2
  • Sample conditioning acc. to standard atmosphere 23/50

 

Delivery forms

Total thickness in μm:
100,130, 150, 180, 200, 230, 280, 340, 450

SynTherm® DMD can be supplied:

  • in slit rolls from widths of 6 mm  (depending on thickness) and above
  • in rolls approx. width 1260 mm
  • in sheets approx. 630 mm x 800 mm or approx. 800 mm x 1260 mm


Overall diameter of the slit rolls/ rolls as required approx. 240, 330 or 450 mm.

Feathering:

  • depth approx. 1 - 12 mm, distance approx. 1 - 10 mm
  • from widths of 10 to 240 mm and thickness of 0.23 mm
Base

PET-film + both sided impregnated non-woven layer

Technical data
Mechanical
Total thickness  Thickness tolerance  Specific weight  Film thickness  Tensile strength longitudinal  Tensile strength transversal  Elongation at break (unfold) longitudinal  Elongation at break (unfold) transversal  Dielectric strength (unfold) 
Unit of measure                  
mm  0.10 0.13 0.15 0.18 0.20 0.23 0.28 0.34 0.45
± 15 ± 15 ± 15 ± 15 ± 15 ± 15 ± 15 ± 10 ± 10
g/m²  102 125 160 200 230 270 355 440 565
µm  36 23 50 75 100 125 190 250 350
N/mm²  60 50 75 80 80 90 100 100 100
N/mm²  - 25 60 60 60 75 85 100 100
15 20 20 20 20 20 20 20 30
- 50 55 60 60 60 60 60 80
kV  5.5 5 7 8 11 14 19 24 30

SynTherm® is a registered trademark of SynFlex.