PET Injection Molding

PET or polyester is a semi-crystalline resin that provides a natural high gloss finish, dimensional stability, and UV resistance


We offer two grades of PET at Protolabs:

  • Rynite 530 (30% Glass Filled)
  • Rynite 935 (35% Glass Filled)

Both grades are similar in that they are UV-resistant polymers with a well-rounded thermal, mechanical, and chemical properties. The thermoplastic material is well-suited for electrical applications. Rynite also flows well into the mold so it can more easily fill thin walls and complex features.

Key benefits of PET:

  • Dimensional stability
  • UV resistance
  • Lightweight
  • Durable
  • Natural high-gloss surface finish
  • Stiffness

Injection Molding PET Material Properties

  Tensile Modulus
Tensile Stress
Flexural Modulus Rockwell Hardness
Melting Point Data Sheet
Test Method ISO 527 ISO 527 ISO 178 ISO 20390 ISO 11357  
Rynite 530 (30% Glass Filled) 11,000 MPa 158 MPa 8,950 MPa 120 252°C VIEW PDF
Rynite 935 (35% Glass Filled) 10,200 MPa 85.0 MPa 9,100 MPa 115 252°C VIEW PDF

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