SynFlex Group:
IsoTek
Language
Please tell us
SynTherm® – Insulating Materials

SynTherm® APA/50

SynTherm® APA/50 is a flexible 3-ply insulating material made of polyester film with a layer of aramid paper marked with yellow stripes on both sides.

Attributes

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.

Application

SynTherm® APA/50 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 50 is used as core, interlayer and final insulation for transformers. It can also be used for slot insulation, interphase and liner insulation. It can also be used for slot insulation, interphase and liner insulation in Class F/H electric motors.

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:
130, 160, 180, 220, 240, 310, 370, 410, 470. Further thicknesses on request.

SynTherm® APA/50 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
Nominal thickness  Typical thickness  Specific weight  Film thickness  Aramid paper thickness  Tensile strength longitudinal  Tensile strength transversal 
Unit of measure                   Test method 
mm  0.13 0.16 0.18 0.22 0.24 0.31 0.37 0.41 0.47 IEC 60626-2
mm  0.13±15% 0.16±15% 0.18±15% 0.21±15% 0.24±15% 0.30±15% 0.36±10% 0.40±10% 0.46±10%  
g/m²  125 160 190 230 260 350 440 510 570 IEC 60626-2
µm  23 50 75 100 125 190 250 300 350  
µm  50 50 50 50 50 50 50 50 50  
N/cm  100 130 160 190 210 290 340 400 450 IEC 60626-2
N/cm  70 100 140 170 200 300 420 350 400 IEC 60626-2
Typical electrical properties
Nominal thickness  Dielectric strength 
Unit of measure                   Test method 
mm  0.13 0.16 0.18 0.22 0.24 0.31 0.37 0.41 0.47  
kV  6 10 12 14 18 22 25 26 28 IEC 60626-2

SynTherm® is a registered trademark of SynFlex.