SynTherm® – Insulating Materials SynTherm® APA/80

SynTherm® APA/80 is a flexible 3-ply insulating material made of polyester film with a layer of aramid paper marked with green stripes on both sides.

The proven dielectric properties of the polyester film and the excellent mechanical and thermal properties of the outer aramid paper layers result in a high performance insulating material. The ability of the outer layers to absorb impregnants results in exceptional bonding between all winding components.

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Application

SynTherm® APA/80 is a cost-effective insulating material which can be installed in suitable insulating systems of class H (180 °C) and is used in electric motors as slot insulation, phase insulation and wedges.
SynTherm® APA/80 is used as core, interlayer and final insulation for transformers.

Standards

  • Suitable for class H (180 °C) systems
  • UL approved e.g. E247773
  • RoHS compliant according to 2011/65/EC

Delivery forms

Total thicknesses in µm:
220, 300, 360, 480

SynTherm® APA/80 is available:

  • in tapes: depending on material thickness on request beginning at 6 mm (thin material)
  • in rolls: 968 mm

Feathering:

  • Depth approx. 1-12 mm; distance approx. 1-10 mm
  • Form widths of 10 mm to 240 mm, thickness on request

Base

PET-film + aramid paper on both sides

Technical data

Typical mechanical properties
Property Unit of measure
Nominal thickness mm 0.22 0.30 0.36 0.48
Typical thickness mm 0.22±15 % 0.29±15 % 0.36±15 % 0.47±10 %
Specific weight g/m² 205 315 405 560
Film thickness µm 50 125 190 300
Aramid paper thickness µm 80 80 80 80
Tensile strength longitudinal N/cm 200 270 360 450
Tensile strength transversal N/cm 130 240 300 350
Typical electrical properties
Property Unit of measure
Nominal thickness mm 0.22 0.30 0.36 0.48
Dielectric strength kV 9 16 22 > 25