EMI shielding compounds to replace metal in automotive sensing systems

  • EMI protection to eliminate “noise”
  • Advantages over metal or conductive coated plastic housings
  • EMI shielding can be incorporated into wide range of resins (incl. PA, PBT, PC & PEI)

RTP Company has developed new EMI shielding compounds that are suitable for replacing metal or conductive coated plastic housings in automotive sensing systems. Sensing systems require reliable EMI protection to eliminate “noise” that could interfere with signal processing. And, as automotive industry engineers incorporate more electronic safety systems into vehicles, they need materials that are lighter in weight and provide greater design flexibility.

The EMI compounds from RTP Company can be “tuned” to provide the precise range of EMI protection required for individual automotive systems. Thermal management properties can also be combined with EMI protection in a single ready-to-mould compound, which is advantageous because, like metal, it can be used in a dual role as an EMI shield and a heat sink. It is also possible to incorporate other performance enhancements during compounding, such as EMI absorbers, flame retardants and structural reinforcement. The compounds provide corrosion resistance advantages that injection mouldable thermoplastics have over traditional metal materials used to provide EMI protection. In addition, the sensing system components provide consistent EMI shielding properties while minimizing total system cost as they feature moulded-in shielding performance achieved in a single production step. This is a more economical approach than coating moulded plastic parts with a conductive layer in a secondary process that increases manufacturing time and costs. EMI shielding and other properties can be incorporated into a wide range of resin systems including polyamides (PA), polybutylene terephthalate (PBT), polycarbonate (PC), or polyetherimide (PEI).

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