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SynTherm® – Insulating Materials

SynTherm® VP

SynTherm® VP is a flexible 2-ply insulating material made of polyester film with a layer of polyester non-woven.

Attributes

SynTherm® VP is an insulating material without additional impregnants, which can be used for insulation class F (155 °C)  systems after through impregnation with varnishes or resins of the corresponding insulation class. The ability of the fleece layer to absorb impregnants results in outstanding saturation of the slot surfaces and exceptional bonding of all winding components with the laminated core. SynTherm® VP is characterised by its high resistance to moisture and chemicals and excellent dielectric strength. The smooth surface of the SynTherm® VP makes the material ideal for machining.

Application

SynTherm® VP is used as slot insulation and phase insulation in electric machines. SynTherm® VP is used as interlayer insulation and final insulation in transformers.

Standards
  • Suitable for insulation class F 155 °C systems (UL file number E247773) after impregnation with high quality class F or H varnishes or resins
  • RoHS compliant according to 2011/65/EU
Delivery forms

Total thickness in μm:
150, 180, 230, 300, 350, 400

 SynTherm® VP can be supplied:

  • in tapes: depending on material thickness

   on request beginning at 10 mm

  • in rolls: approx. 1300 mm

Feathering:

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

PET-film + polyester non-woven on one side

Technical data
Typical mechanical properties
Nominal thickness  Thickness tolerance  Specific weight  Film thickness  Tensile strength (unfold) longitudinal  Tensile strength (unfold) transversal  Elongation at break (unfold) longitudinal  Elongation at break (unfold) transversal 
Unit of measure            
µm  150 180 230 300 350 400
±15 ±15 ±15 ±10 ±10 ±10
g/m²  170 210 300 380 450 520
µm  100 125 190 250 300 350
N/mm²  90 90 100 100 90 90
N/mm²  80 80 90 90 90 90
20 20 20 20 20 20
70 70 50 50 50 50
Typical electrical properties
Nominal thickness  Dielectric strength (unfold) 
Unit of measure            
μm  150 180 230 300 350 400
kV  8 9 16 18 22 24

SynTherm® is a registered trademark of SynFlex.