Polyetheretherketone fiber is a fully aromatic fiber with the presence of ether bonds and ketone bonds, which makes the fiber's high temperature resistance, friction resistance, and corrosion resistance much higher than conventional fibers.Polyetheretherketone fiber is mainly used in mixed composite materials for structural parts required for aerospace and weapons equipment, braided sheaths for high-performance wires and cables in aerospace, and drying canvases and heat-resistant filter cloths for papermaking machinery in the civilian field. Heat-resistant and corrosion-resistant textile belts, composite materials (mixed with glass fiber and carbon fiber), high-temperature resistant materials for the energy industry, etc.