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COGETHERM

Cogetherm is a mica laminate designed for electromechanical and thermomechanical applications requiring one or more of the following properties:
  • excellent resistance to heat and even to open flame up to 1000 Deg C
  • low thermal conductivity
  • excellent electrical insulation
  • high resistance to pressure
  • impervious to most chemicals, in particular oil and grease
  • ASBESTOS-FREE
  • ecologically safe and non-toxic

 

  Unit M/MC P/PC
Heat Resistance      

 

 continuous °C 500 700

 

 peak °C 700 1000
Resistance to thermal shocks      

 

 up to 6mm thickness °C 500 400

 

 above 6mm thickness °C 400 200
Weight Loss      

 

 continuous temp 500 °C % <1 <1

 

 continuous temp 700 °C %   <2
Thermal conductivity      

 

 perpendicular to plane of the plate W/m.°K 0,3 0,3

 

 along the plane of the plate W/m.°K 3 3
Specific Heat J/kg °C 866 866
Thermal expansion      

 

 perpendicular to plane of the plate 10-6/°K 100 100

 

 along the plane of the plate 10-6/°K 10 10
Water absorption 24h/23°C % <1 <1

 

Fire resistance classification Norm Class
  BS 476 1
  NBN 21-203 A1
  NFF 16 101 u.102 MP u.FO
  UL 94 94 V-O
Fume toxicity classification CEI 2037/85 Index 0,16
 

very low optic density of fumes
  non toxic

 

  Test Procedure Unit
M/MC
P/PC
Dielectric Strength IEC 243  
  20 °C   kV/mm
25
25
  400 °C / 1 hour, tested at 20 °C kV/mm
13
13
  600 °C / 1 hour, tested at 20 °C kV/mm
10
10
Tracking Resistance IEC 112 V
500
525
Volume resistivity    
  20 °C IEC 93 Ohm/cm
> 10 ^16
> 10 ^16
  400 °C IEC 93 Ohm/cm
> 10 ^12
> 10 ^12
  500 °C IEC 93 Ohm/cm
> 10 ^9
> 10 ^9
Dielectric loss 160 °C IEC 250 %
< 1
< 1
Relative permittivity    
  20 °C IEC 250  
6,5
6
  400 °C IEC 250  
7
6,5

 

Test Procedure
Unit
M
MC
P
PC
Density IEC371-2 g/cm3
2,15
2,15
2,15
2,15
Compressive 20°C ISO 604 MPa
400
360
330
310
Strength 200°C   MPa
250
235
240
225
Tensile Strength ISO 527 MPa
150
140
110
100
Bending Strength ISO 178 MPa
230
200
170
150

 


Presspahn Ltd, Wharncliffe Works, Harrogate Road, Bradford, BD2 3TB
Tel: +44 (0) 1274 636333 Fax: +44 (0) 1274 626024
E:Mail:Sales@Presspahn.com