AvaSpire® AV-621 is an unreinforced polyaryletherketone (PAEK) that offers improved ductility and impact strength relative to PEEK while retaining most of the key performance attributes of PEEK. The AV-621 grade is the low melt flow (higher molecular weight) analogue of the medium flow grade AvaSpire® AV-651 that is tailored primarily for injection molding applications as well as film extrusion. AvaSpire® AV-621 resin is suited for a variety of processing methods including compression molding, stock shape extrusion, as well as injection molding. AV-621 has been formulated for applications requiring a balance of chemical resistance and mechanical strength along with good part aesthetics, thereby bridging the performance gaps within the ultra polymers space. These and other properties make this resin well-suited for applications in healthcare, transportation, semiconductor, electronics, chemical processing, and other industries. AvaSpire® AV-621 is easily fabricated using conventional thermoplastic melt processing techniques and standard equipment. The resin has a uniform opaque appearance with a beige color similar to that of PEEK. 
  • Natural: AvaSpire® AV-621 NT


  • Global Business Unit
    Specialty Polymers
  • Brand
  • Synonyms


Segments Applications
Printing, Inks & Adhesives 3D Printing | Adhesives
Chemical Industry Chemical Engineering
Industrial Equipment Industrial Equipment Parts | Pipes, Pumps, Fittings & Valves
Industrial & Protective Coatings Linings
Segments Applications
Air Treatment Air Quality improvement
Water Treatment Drinking Water Treatment | Industrial Water Treatment | Municipal Water Treatment
Segments Applications
Accessories Baby trolley & seat
Household Goods Power Tools & Garden
Sports & Leisure Sports & Leisure
Textiles & Fibers Textiles & Fibers
Segments Applications
Medical Devices Consumables for Patients | Dental devices | Orthopaedics
Medical Equipment & Instruments Re-usable devices & instruments | Single-use devices & instruments | Surgical cases & trays | Sterilization (sterilization cases & trays) | Diagnostic, treatment & monitoring equipment | Medical Equipment (no instruments)
Segments Applications
Energy savings Cooling & Heating systems | Thermal insulation
Resource Efficiency Electricity Generation | Plumbing & Heating
Protection & Safety Fire Protection | Mastics & Sealants
Segments Applications
Electrification Electrical / Electronics | Lighting | Electric Motors
Green & Clean Technologies Emission Reductions
Segments Applications
Food Processing Food Processing
Segments Applications
Equipment & Parts Piping & Tubing
Segments Applications
Propulsion Nacelle | Turbine | Rocket Engine
Electrical, Air & Fluid Systems Fluid systems (water, jet fuel, hydraulic liquid) | Air Systems (ducting)

Chemical categories

Chemical category Chemical family Chemical product
Specialty Polymers Polyketones, Aromatic PAEK (Polyaryletherketone)

Region of commercial availability

  • Asia / Pacific
  • Europe / Middle East / Africa
  • North America
  • Latin America

Download documentation for AvaSpire® AV-621