Materials

PET (Polyethylene Terepthalate)

PET polyesters are semi-crystalline. They are versatile materials with a good range of properties. They have excellent electrical properties and are abrasion resistant. PET has not been as extensively compounded as PBT because it is more difficult to process. PET has a higher modulus than PBT. Like PBT, PET is very anisotropic in shrink, therefore it is difficult to mold to extremely close tolerances.

HiFillLNP Stat-KonValoxPetra

Typical Properties

Tensile Strength7,000-23,000 psi
Flexural Modulus350,000-3,000,000 psi
Impact Strength.45-8 ft-lb/in notched izod
Max Temperature250°-420° F
Chemical ResistanceFair to Good

Applications

  • Reusable bottles
  • Pacifiers
  • Sippy cups
  • Bottle sterilizer lids
  • Medical devices
  • Housewares

Advantages

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

Disadvantages

  • − Highly susceptible to degradation when heated above 150°C in the presence of moisture
  • − Cannot be exposed to elevated temperatures
  • − Must be thoroughly dried prior to processing
  • − High processing temps required
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