Engineering Thermoplastics
PET Unfilled — Polyethylene Terephthalate Unfilled
PET is a versatile polyester known for its excellent clarity, stiffness, toughness, and barrier properties against gases and moisture. While commonly used in bottles and fibers, certain grades are engineered for injection molding applications requiring good mechanical and thermal performance.
PETMylarCelanex (also PBT)Arnitel (TPC, related)
Manufacturers
3
Grades
2
Applications
4
Equivalents
0
Physical Properties
- Density
- 1.33-1.40 g/cm³
- Water Absorption (24h)
- 0.1-0.3 %
- Transparency
- Transparent to Opaque (depending on grade)
- Shrinkage
- 1.0-2.0 %
Mechanical Properties
- Young's Modulus
- 3.0-4.0 GPa
- Tensile Strength
- 50-70 MPa
- Elongation at Break
- 5-50 %
- Impact Strength (Izod)
- 3-7 kJ/m
Thermal Properties
- Glass Transition Temperature
- 65-80 °C
- Melting Point
- 250-265 °C
- Continuous Service Temperature
- 80-100 °C
- Heat Deflection Temperature
- 50-70 °C (1.8 MPa)
Electrical Properties
- Dielectric Constant
- 3.0-3.5
- Volume Resistivity
- 10^14-10^16 Ohm-cm
- Dielectric Strength
- 15-25 kV/mm
Chemical Resistance
- Acids
- Good
- Bases
- Poor
- Solvents
- Good (alcohols, oils)
- UV Resistance
- Fair
Sustainability
- Recyclability
- Highly Recyclable
- Recycling Code
- 1 (PET)
- Carbon Footprint
- Moderate
Manufacturing compatibility
Injection MoldingExtrusionBlow Molding
Applications
Electrical insulators
Automotive components
Packaging films
Fibers
Available grades
PET Standard UnfilledPET Heat-Stabilized