Polyester (PET)

Polyester (PET)

Polyester is formed when polyester is combined with diacids and diols. This combination produces a resin that retains its strength, clarity, and mechanical properties. Polyester’s versatility and flexibility makes it an effective choice for high-volume, low-cost parts as well as critical, more expensive component parts. One of the most popular copolyesters on the market today is Eastman’s Tritan.

Common Uses:

  • Infant Products: Reusable bottles, pacifiers, sippy cups, bottle sterilizer lids
  • Appliances: flour care, dishwasher parts, refrigerator ice buckets, refrigerator inside doors, small and large applicance parts
  • Medical devices
  • Consumer industry: housewares, furniture, bags, film

Physical Properties:

  • Specific Gravity - 1.17 g/cm
  • Tensile Strength - 6380 psi
  • Flexural Strength - 9570 psi
  • Impact Strength - 2.36 ft-lb/in

General Properties:

  • High temperature resistance
  • Easy processing
  • High impact resistance
  • Excellent clarity
  • Excellent toughness
  • High chemical resistance
  • Some grades FDA approved


  • Injection Molding
  • Extrusion

Call Project Engineering at (713)643-6577 or ask an engineer