Polyester Film Properties

Physical, mechanical, thermal, electrical, and optical properties of polyester film

Polyester Film is a strong, transparent, and dimensionally stable plastic film with outstanding chemical resistance. It has low water absorption and is very difficult to tear. Polyester film is widely used for control panels, touch pads, membrane switch overlays, shims, spacers, gaskets, industrial laminates, face shields, and more.

Polyester Film is available in several grades including print treated, slip treated, and hard coated. Conversion capabilities include: die cutting, guillotining, interleaving, rewinding, sheeting, slitting, spooling, and tipping. Please ask your Curbell Plastics representative for more specific information.

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For a glossary of terms, see our Plastic Properties Descriptions.

 

TYPICAL PROPERTIES
  UNITS ASTM TEST  
Tensile Strength psi D638 *
Flexural Modulus of Elasticity psi D790 -
Izod Impact (notched) ft-lbs/in of notch D256 -
Heat Deflection Temperature (66psi / 264psi) °F D648 -
Water Absorption
(Immersion 24 hours)
% D570 0.40

 

PHYSICAL PROPERTIES
  UNITS ASTM TEST  
Specific Gravity - D792 1.39
Water Absorption
(Immersion 24 hours)
% D570 0.40

 

MECHANICAL PROPERTIES
  UNITS ASTM TEST  
Tensile Strength psi D638 *
Tensile Modulus of Elasticity psi D638 *
Tensile Elongation % D638 *
Flexural Strength psi D790 -
Flexural Modulus of Elasticity psi D790 -
Compressive Strength psi D695 -
Hardness scale as noted D785, D2240 1.5
Izod Impact ft-lbs/in D256 -

 

THERMAL PROPERTIES
  UNITS ASTM TEST  
Coefficient of Linear Thermal Expansion in/in/°F x 10-5 D696 0.9
Heat Deflection Temperature (66psi / 264psi) °F D648 -
Max Continuous Service Temperature In Air °F - -

 

ELECTRICAL PROPERTIES
  UNITS ASTM TEST  
Dielectric Strength V/mil D149 -

 

OPTICAL PROPERTIES
  UNITS ASTM TEST  
Light Transmittance % D1003 93
Haze % D1003 1.5

 

OTHER
  UNITS ASTM TEST  
Coefficient of Friction - Dynamic 0.43

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.

Still Not Sure if You Need Polyester Film? Research Polyester Film or Ask a Plastics Expert.