Conductive rubber is mainly composed of resin matrix, conductive particles, dispersing additives and auxiliaries. At present, the conductive rubber used in the market is mostly filler type.
Filler conductive rubber resin matrix, in principle, can use a variety of adhesive types of resin matrix, commonly used thermosetting adhesives such as epoxy resin, silicone resin, polyimide resin, phenolic resin, polyurethane, acrylic resin and other adhesive systems. These adhesives form the molecular skeleton structure of conductive rubber after curing, which provides mechanical properties and bonding properties, and enables conductive filler particles to form channels. Because epoxy resins can be cured at room temperature or below 150 ° C and have rich formulation-designable properties, epoxy-based conductive rubber is currently dominant.
Conductive rubber requires conductive particles themselves to have good conductive properties. The particle size should be within the appropriate range and can be added to the conductive rubber matrix to form a conductive path. Conductive fillers can be gold, silver, copper, aluminum, zinc, iron, nickel powder and graphite and some conductive compounds.
