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.
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.