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Apr 16, 2025

Foils, Films, Fibreglass Polyimide (reinforced)

The thermal conductivity of silicone is almost zero. Only by introducing, into the polymer structure of the elastomer, thermally conductive filler particles such as boron nitride, aluminium oxide, aluminium nitride or other ceramic mixtures, the desired thermal conductivity can be achieved.

Patented special methods guarantee the correct and even geometric insertion of the thermally conductive particles into the structure of the silicone rubber. The final result of this process are products with excellent thermal, mechanical and electrical properties of up to 8 W/mK.

When subjected to pressure, the great capacity of silicone to adapt to the contact surfaces comes into play. Air pockets are expelled, and thermal contact resistance – and, therefore, total thermal transfer resistance – can be minimized. Fibreglass or polyimide substrates add mechanical stability to the interface material. Some product variants are available also with adhesive coating on one or both sides.

ICT SUEDWERK offers a wide and varied range of the most diverse, highly thermally conductive and electrically insulating T.I.M. foils and films.

PRODUCT PROPERTIES

  • Thermal conductivity from 0.80 to 8.00 W/mK
  • Low thermal resistivity Rth (from 0.08 °C-inch²/W)
  • High dielectric strength (> 1 kV to >20 kV AC)
  • Material thickness from 0.11 to 1.00 mm
  • (other gauges available upon request)
  • High temperature resistance and reliability (- 60°C to 200°C)
  • Non-flammable (UL 94 VO) for most variants

PROPERTIES AND ADVANTAGES AT A GLANCE

  • Process-safe handling and pre-application due to one-sided adhesion
  • Very safe electric insulation; mechanical stability due to fibreglass or
  • substrate reinforcement; additional mechanical fastening
  • (screws, clips, bolts etc.) are possible, depending on application design
  • No smearing (smudge-free) and no migration, as opposed to thermally
  • conductive pastes
  • Solvent-proof and low outgassing
  • Very process-safe due to even material thickness

PRODUCT VARIANTS

  • Silicone polymer-based with ceramic filler
  • Dielectric
  • Re-positionable (detachable) or adhesive on one/both sides
  • Hard surface or compressible/soft
  • Variable IRHD/ISO 761 (55 to >95) and Shore A (85 to >90)
  • hardness degrees available
  • Unreinforced or reinforced
  • (PET mesh, fibreglass or carrier film, e.g. PI film)
  • Very thin material gauges possible

DELIVERY FORMS AND VARIANTS

  • In sheets or on rolls
  • Loose bulk cuts or kiss-cut on sheets or on rolls
  • In defined mat formats with release liner on both sides
  • In defined roll formats with one-sided carrier/release liner or, if required,
  • with release lining on both sides (PET film or silicone-coated paper)
  • Other customer-specific delivery formats available upon request

TYPICAL AREAS OF APPLICATION

Thermally conductive foils and films are used in manifold applications in

  • high-Power LEDs (strips, arrays etc.), discrete semiconductors MOSFETs
  • diodes, and other semiconductor and component parts,
  • power semiconductors, brake resistors, heating resistors, etc.

Applications e.g.:

  • AC converters, power supplies, electric drives,
  • engine controls, frequency converters
  • UPS, LEDs, automotive
  • photovoltaics, etc.

More informaion about the product here