Conductive Elastomers are fully cured silicone, fluorosilicone or EPDM available in sheet form and many different extrusion profiles. These elastomers are loaded with electrically conductive particles to give excellent EMI shielding performance along with environmental sealing. The conductive particle filler is available in various materials depending on your substrate and environmental conditions.
Conductive Elastomer Material Construction Matrix
Conductive elastomer gaskets are typically used to achieve a Faraday effect in an electronic enclosure/device and with our conductive elastomer range we can offer superior corrosion resistance, environmental sealing and cost-effective EMI shielding. These come in the form of sheet stock, die-cut to your drawings and extrusion offered as cord stock at length or spliced/fused to form a continuous seal.
Custom extrude profiles
Frequently Asked Questions
What are the advantages of using a spliced o-ring?
Spliced o-rings have quick turnaround, no tooling costs, lower MOQ's, and there are hollow profile gaskets available. Also, MIL SPEC of the material is carried over to the spliced gasket that is made at HITEK.
What are the advantages of using moulded o-rings?
Moulded o-rings have tighter tolerances, shape retention (prevents o-rings from jumping out of the groove), are cost effective when taken in volume and have smaller sizes available (<10mm I/D).
Do I need PSA (Pressure Sensitive Adhesive) backing on my gasket?
PSA is recommended where a ‘3rd hand’ is needed. It is designed to hold the gasket in place during assembly. Please note all adhesive backed conductive silicones have a reduced shelf life of 12 months. Please consider this if stocking of parts is needed.
Why do I need hard stops or compression stops when using a flat die-cut gasket?
Firstly, die-cut gaskets offer ease of assembly and greater surface area contact on the flange areas. Compression stops are advisable to avoid and prevent one time use of flat die-cut gaskets. The main reason is to resolve over torquing, over deflecting the gasket and resolving any movement/vibration challenges.
What is the overall groove fill for a solid and hollow profile gasket?
For a solid profile: 90% to 95% max overall groove fill and for a hollow profile: approx. 100% to 105% max overall groove fill. Please note, you need to avoid 100% overall groove fill, as this will result in deforming the gasket and accelerated compression set. The elastomer gasket needs space in the groove to contract outwards such as in the temperature changes/cycles phase.