Materials

摘要

Chomerics has developed a lightweight, electrically conductive plastic for EMI shielding of high-temperature avionics (Figure 1). PREMIER PolyEtherlmide (PEI)-140 reportedly maintains high-temperature tolerance, chemical resistance and UL 94V-0 flammability rating for a cost-effective electronics shielding solution up to 85dB in aerospace applications. PEI-140 is stated to comply with avionics smoke density requirements in the event of an on-board fire. PEI was chosen for the base resin of avionics grade PREMIER for its outstanding elevated thermal resistance, exceptionally high-strength mechanical properties, flame resistance and extremely low-smoke generation. PEI-140 is an amorphous thermoplastic reinforced with matrix of proprietary conductive fillers to provide EMI shielding. PEI-140 is engineered to optimize stable electrical, mechanical and physical performance for EMI shielding in continuous use at temperatures up to 340°F (170℃). PEI-140 is also appropriate for high-performance applications in other industries such as defence, medical electronics and transportation, where properties of light weight, strength, flame resistance and EMI shielding add value.