... temperature 180 ), showed good toughness and rigidity .The PEI product has a high hardness, good wear resistance, ... highlighting the electrical properties , PEI very suitable for electrical, electronic insulation pieces (ie ... injection and machining. PEI product: PEI board, PEI rods, PEI accessories, injection of PEI , PEI machining parts,PEI bearings, PEI connectors, and other ...