Flexible conductive silicone adhesives
The range of flexible adhesives are based mainly on silicone elastomers and are particularly suitable for bonding materials that have differing coefficients of thermal expansion. A typical example of this type of requirement would be the bonding a glass or polycarbonate shielded window into an aluminium bezel or panel aperture. The adhesive secures the window in place but accommodates any movement due to differential thermal expansion/contraction or flexing whilst maintaining a low impedance connection. Our flexible conductive adhesives are also very resistant to vibration, shock and extremes of temperature (thermal shock) whilst providing a high level of environmental sealing.
Flexible conductive silicone adhesives key properties and benefits:
- Single component – ready to use
- Room temperature cure
- Neutral cure – does not evolve corrosive by-products on curing
- Safe for use with most common substrates – non tarnishing / discolouring
- Excellent resistance to ageing
- Wide service temperature range – remains flexible and conductive at extremes of temperature
- Stable - low bond (joint) resistance through temperature cycling
- Based on a range of conductive fillers to suit the electrical and environmental requirements of most applications
The main conductive filler types along with their key characteristics are shown below. Please note that this is only an approximate guide in this respect as an adhesive should ideally be matched to a particular application in terms of substrate(s) and service conditions.
- Silver-plated copper - low bond resistance
- Silver-plated nickel – temperature stable
- Silver-plated aluminium – galvanic compatibility with aluminium alloys
- Nickel coated graphite – tolerant of surfaces with comparatively high contact resistance e.g. die-cast zinc alloys and ‘yellow’ or heavy chromate conversion finishes
- Carbon – semi-conductive, ideally suited to ESD control
Applications:
- Vibration and/or shock resistant sealant/adhesive for electronic assemblies
- Electrical connection/bonding of materials with dissimilar thermal expansion coefficients
- EMI shielding with environmental sealing (IP68 possible)
- ESD control/grounding
Can't find what you need? Our knowledgeable and helpful staff are waiting to assist you further. Contact Shielding Solutions
