Polyester (PET) Film | Piedmont Plastics

Common Properties

Common Brand Names Melinex®, MYLAR®, Skyrol®, PolyEfx®, ARYAPET
Typical Thickness Size 0.001 – 0.014 in
Typical Lengths 100 ft
Typical Widths 24, 36, 48, 60 in
Friendly Names PET Film
Common Profiles Film

Physical Properties

Density 1.35–1.40g/cm³
Water Absorption 0.1 - 0.5%
Moisture Absorption at Equilibrium 0.1 - 1%
Linear Mold Shrinkage 0.2–0.6%
Melt Flow 0.1 - 50g/10 min

Electrical Properties

Dielectric Strength 15 - 25kV/mm
Dielectric Constant 3.2 - 3.8
Dissipation Factor 0.003 - 0.005
Volume Resistivity 10^14 - 10^16ohm·cm
Surface Resistivity 10^15 - 10^17ohm/sq
Arc Resistance 100 - 120seconds
Comparative Tracking Index (CTI) 200 - 600V
Thermal Coefficient of Dielectric Constant 20 - 50ppm/°C
Electrostatic Discharge (ESD) Sensitivity Moderate
Breakdown Voltage 10 - 30kV

Mechanical Properties

Hardness 110Rockwell R
Tensile Strength, Ultimate 550MPa
Tensile Strength, Yield 150–300MPa
Elongation at Break 80 - 120%
Elongation at Yield 5–10%
Modulus of Elasticity 2500MPa
Flexural Yield Strength 200MPa
Flexural Modulus 2500MPa
Compressive Yield Strength 150MPa
Bearing Yield Strength 100–130MPa
Shear Strength 50–70MPa
Izod Impact, Notched 0.35J/cm
Izod Impact, Unnotched 2.5J/cm
Gardner Impact 10–15J
Falling Dart Impact 25J
Instrumented Impact Total Energy 5J

Thermal Properties

CTE, linear 70µm/m-°C
CTE, linear, Transverse to Flow 100µm/m-°C
Deflection Temperature at 0.46 MPa (66 psi) 80–90°C
Deflection Temperature at 1.8 MPa (264 psi) 70–80°C
Vicat Softening Point 100–120°C
Flammability VTM - 2 or HBUL94
Max Continuous Operating Temperature 150–170°F
Minimum Operating Temperature - 40°F
Thermal Conductivity 0.15W/m-K

Regulations

UL-94 Flame Class
FDA
ASTM/Mil-Spec
USDA
D635 Self Extinguishing
RoHS Compliant
REACH Compliant

Polyester (PET) film is a versatile plastic widely used in many applications. PET materials exhibit good chemical resistance and are tough and durable compared to other commodity resins with similar performances and price ranges. This material can also be die cut or laser cut to efficiently create products with consistent designs.

The dimensional stability of polyester film allows it to be used in numerous applications, including face shields, laminates, membrane circuitry, electronic insulation, carrier films, and a variety of graphic arts applications.

Specific polyester films can be made to be FDA approved. This characteristic provides a tremendous benefit for applications such as face shields that are used in areas where sterilization and cleanliness is vital.

Most readily produced in gauges from 48 (1/2 mil) to .014, PET film is available as print treated on one or two sides for easy printability, slip treated for ease of handling, and in options such as super clear, clear, hazy and white depending on your particular needs.

Piedmont Plastics carries a variety of film products in varying grades, textures, and transparencies in multiple locations across North America. Contact us today to discuss your polyester film needs and our dedicated film specialists will help you select the right solution for your application.