2003 · 89 citations · 5 references
EngineeringMaterials EngineeringMaterials ScienceActuatorsElectronic MaterialsSensorsAcoustic SensorsActuator MaterialsDielectricsElectric ActuatorsElectromechanical SystemsPiezoelectric MaterialsCellular Polymer StructureElectromechanical ActuatorsFlexible TransducersPolypropyleneTransducers
EMFi is a new electret material featuring a cellular structure that imparts flexibility and high sensitivity to dynamic normal forces due to its voided internal architecture and strong permanent charge. It is fabricated from low‑priced polypropylene, and its structure, operation, and characterization are detailed in the study. EMFi is patent‑protected worldwide and can be used in sensors, switches, loudspeakers, and specialized transducers.
ElectroMechanical Film (EMFi) is a new electret material with a cellular structure. EMFi's advantage over other solid polymer electrets is based on its flexibility due to the voided internal structure combined with strong permanent charge, which makes EMFi very sensitive to dynamic forces exerted normal to its surface. The base material is low-priced polypropylene (PP). Structure, operation and characterisation of the EMFi material is described. EMFi, which can be applied in various sensors, switches, loudspeakers and special transducers, is patented world wide.
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