SynTherm® – Insulating Materials SynTherm® VPV

SynTherm® VPV is a flexible 3-ply insulating material made of polyester film with a layer of polyester non-woven on both sides.

SynTherm® VPV 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 non-woven layers to absorb impregnants results in outstanding saturation of the slot surfaces and exceptional bonding of all winding components with the laminated core.

SynTherm® VPV is characterised by its high resistance to moisture and chemicals and excellent dielectric strength. The smooth surface of the SynTherm® VPV makes the material ideal for machining.

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Application

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

Standards

  • Suitable for insulation class F 155 °C systems after impregnation with high quality class F or H varnishes or resins (file-no. E247773)
  • RoHS compliant according to 2011/65/EU

Delivery forms

Film thickness in μm:
120, 150, 180, 200, 230, 300, 350, 450

SynTherm® VPV can be supplied:
- in slit rolls from widths of 10 mm and above
- in rolls approx. 630 mm or 1,260 mm
- in sheets approx. 630 mm x 800 mm or
                approx. 800 mm x 1,260 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 + polyester non-woven on both sides

Technical data

Mechanical
Property Unit of measure                
Nominal thickness  mm  0.12 0.15 0.18 0.20 0.23 0.30 0.35 0.45
Thickness tolerance max.  ± 15 ± 15 ± 15 ± 15 ± 15 ± 15 ± 10 ± 10
Specific weight  g/m²  115 145 190 220 260 350 425 555
Film thickness  µm  23 50 75 100 125 190 250 350
Elongation at break (unfold) longitudinal  20 20 20 20 20 20 20 20
Elongation at break (unfold) transversal  50 50 50 50 50 50 50 50
Tensile strength longitudinal  N/10 mm  50 110 140 160 200 300 350 400
Tensile strength transversal  N/10 mm  40 90 105 120 150 200 300 350
Electrical
Property Unit of measure                
Nominal thickness  mm  0.12 0.15 0.18 0.20 0.23 0.30 0.35 0.45
Dielectric strength (unfold)  kV  4 6 7 9 10 15 18 22