WEB EXCLUSIVE: Arkema (U.S. office in King of Prussia, Pa.) says its newly developed Kepstan 6000 PEKK (polyethereketoneketone) copolymers offer a low melting point and a slow crystallization rate for injection molding and extrusion in industries such as automotive, aerospace, and oil and gas. These properties allow for lower processing temperature and the ability to process these copolymers as either amorphous or semi-crystalline structures, depending on processing technology and cooling conditions, according to Tim Spahr of Arkema’s corporate research in North America. “They can be injection molded and extruded as an amorphous polymer without the need for quenching,” he said.
Kepstan 6000 series copolymers have a melt temperature of 581 F, the lowest of the polyaryletherketone (PAEK) material family. However, they have a glass-transition temperature of 320 F, which is among the highest in that family. The new series includes medium-, high-, and very high-flow grades that allow for use in a broad range of processing technologies, including film/sheet extrusion, laser sintering, calendering, thermoforming, injection molding, fiber impregnation, compression molding, rotomolding, powder coating, bonding, and welding.