Products

Keratherm Silicone Free

In case of concerns about silicones, Kerafol offers a ceramics-filled polyurethane film as an alternative material. Besides good thermal and outstanding electrical properties, these films are characterized by very good perforation strength. These good physical properties are achieved with an excellent price-performance ratio.

Flexible ceramic thermal conductive and isolating film. Softtherm U 105 is especially designed for silicone sensitive applications and is an alternative material to the silicone based Softtherm films. The U 105 has an excellent electrical isolation and a very good thermal conductivity.

See also: Keratherm Silicone Free Grease KP 12

Possible Thickness:
     U 23: 0.125mm - 0.3mm
     U 80: 0.15mm - 0.3mm
     U 90: 0.1mm - 0.3mm
     U 105: 0.5mm - 5.0mm

Applications

  • medical application
  • laser equipment
  • space units
  • lighting systems
  • aero units
  • CD-Rom drives
  • U105: RD-RAM memory modules
  • U105: Heat pipe thermal solutions
  • U105: Automotive engines
  • U105: Control units
  • U105: Plasma supply console

Properties

Standard Films: Keratherm Silicone Free
Property Symbol Unit U 23 U 80 U 90 Softtherm
U 105
Color     white blue light blue brown
Thermal Properties
Thermal Resistance Rth K/W 0.52 0.20 0.09 0.96
Thermal Impedance Rti °Cmm²/W
Kin²/W		 208
0.32		 73
0.11		 32.9
0.05		 351
0.53
Thermal Conductivity λ W/mK 1.2 1.8 6.0 1.3
Electrical Properties
Breakdown Voltage Ud;ac kV 9.0 4.0 4.0 8
Dielectric Breakdown Ed;ac kV/mm > 30 25 25 16
Volume Resistivity   Ωcm 4.9x1011 1.44x1014 2.0x1011 1.7x1010
Dielectric Loss Factor tan δ 1 8.0x10-2 13.0x10-3 13.7x10-3 1.3x10-2
Dielectric Constant εr 1 1.7 3.2 3.10 4.6
Mechanical Properties
Measured Thickness (±10%) mm 0.250 0.150 0.200 0.5
Hardness   Shore A 80 - 90 80 - 90 80 - 90 60 - 70
Tensile Strength   N/mm² 5.0 3.0 2.5 -
Elongation   % 250 130 150 -
Youngs Modulus*   N/cm² - - - 98
Physical Properties
Application Temperature   °C -40 to +90 -40 to +125 -40 to +125 -40 to +110
Density ρ g/cm³ 1.36 2.26 1.46.3 2.07
Total Mass Loss TML Ma.-% - - - 0.55
* - Youngs Modulus sample size 30x30x2.5mm3;
   - variable contact pressure;
   - compression 50% of measured thickness;