Vandar® thermoplastic polyester alloys (PBT) combine seeming contradictions — high ductility and good stiffness with excellent chemical and thermal resistance for hard-to-beat properties.

All unreinforced Vandar polyester products have high impact resistance while retaining strength and stiffness.  One grade has a V-0 rating in the UL 94 flammability test down to a thickness of 0.85 mm (0.033 in). A key to the value offered by these Vandar products is that they have high impact well below freezing, yet retain sufficient stiffness to prevent creeping and sagging at much higher temperatures.

Product Properties

  • High impact and notched impact strength at low temperatures
  • High heat-deflection temperature, particularly the glass fiber-reinforced grades (service temperature to 120°C)
  • High resistance to organic solvents, fuels, lubricants and brake fluids
  • High abrasion resistance
  • Good processability
  • Paintability 

These alloys are easy to mold and retain their impact strength down to -30°C; they are available in both unreinforced grades and as compounds with glass fiber and minerals. Glass-reinforced Vandar PBT alloy grades provide added strength, stiffness and toughness over a wide temperature range, from -40°C to 130°C.


  • Basic
  • Glass fiber reinforced
  • Flame retardant 


  • Injection molding
  • Film extrusion   

Vandar® Thermoplastic Polyester Alloy (PBT) Short-Term Properties Guide

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