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PBT is a good choice for plastic parts that will come into contact with food

PBT (Polybutylene Terephthalate)

  • Heat- and solvent-resistant
  • FDA compliant
  • High impact strength
  • Meets ASTM D6261
  • Can be intricately machined


This high-performance thermoplastic is an optimal choice for food processing applications as it is FDA- and USDA- approved for use with food. It offers an excellent combination of wear and moisture resistance with strength and toughness.

PBT is solvent-resistant at room temperature and can withstand a continuous operating temperature of 230° F. It offers excellent dimensional stability with high creep resistance and low moisture absorption. PBT is easily machined and fabricated.


  • Bushes, bearings and pistons
  • Valves and manifolds
  • Automotive parts
  • Electronic equipment
  • Food processing machinery parts


Our application engineers can help. With decades of experience in plastic material selection, we'll help you choose the optimal plastic for your application and budget.

To compare
the cost of this material to other thermoplastics, click here.

General Material Properties

Property   Metric units   English units
Density   1.3e3 - 1.38e3 kg/m^3   0.047 - 0.0499 lb/ft^3
Yield Strength   5.65e7 - 6e7 Pa   8.19 - 8.7 ksi
Tensile Strength   5.65e7 - 6e7 Pa   8.19 - 8.7 ksi
Elongation   0.5 - 3 % strain   8.6 - 14.5 % strain
Hardness (Vickers)   1.67e8 - 1.77e8 Pa   17-18 HV
Impact Strength (unnotched)   1.34e5 - 2e5 J/m^2   63.8 - 95.2 ft.lbf/in^2
Fracture Toughness   1.59e6 - 2.75e6 Pa/m^0.5   1.45 - 2.51 ksi/in^0.5
Young's Modulus   1.93e9 - 3e9 Pa   0.28 - 0.435 10^6 psi
Max Service Temperature   112 - 127 °C   234 - 261 °F
Melting Temperature   220 - 267 °C   428 - 513 °F
Insulator or Conductor   Insulator   Insulator
Specific Heat Capability   1.42e3 - 1.48e3 J/kg °C   0.339 - 0.353 BTU/lb. °F
Thermal Expansion Coefficent   1.08e-4 - 1.71e-7 strain/°C   60-95 µstrain/°F
CO2 Footprint   2.73 - 3.02 kg/kg   2.73 - 3.02 lb/lb
Recycleable   Yes   Yes

The information on this page is intended as general guidance only and is only accurate at the time of posting (see date below). Specific material properties vary by manufacturer. Please contact a Dielectric application engineer for help in choosing the optimal material for your application and budget.

Posting Date: July 30, 2012