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PBT polyesters are semi-crystalline. They are versatile materials with a good range of properties. They have excellent electrical properties and are abrasion resistant. PBT has been extensively compounded giving a very wide range of properties. PBT performs much like Nylon but can handle higher temperatures and does not absorb moisture. PBT has excellent impact strength but is very notch sensitive.

PBT is very anisotropic in shrinkage, so it is difficult to mold to extremely tight tolerances.

Tensile Strength: 6,000-13,000 psi
Flexural Modulus: 300,000-1,200,000 psi
Impact Strength: 1 ft-lb/in notched izod . 30+ ft-lb/in un-notched
Maximum Temp.: 420 F short duration 250 F long term
Chemical Resistance: Fair to Good
Cost: $$$