1.1 This classification system covers unfilled, filled, and reinforced polyetherimide materials suitable for injection molding and extrusion. 1.2 This classification system is not intended for the selection of materials, but only as a means to This classification system covers unfilled, filled, and reinforced polyetherimide materials suitable for injection molding and extrusion. Unfilled polyetherimide materials are classified into groups according to their composition. These groups are subd