PES film possesses a combination of properties such as high resistance to heat and combustibility, low smoke emission and transparency. These coupled with light weight, high tear initiation and propagation strength, dimensional stability, chemical resistance and thermoformability make the film particularly useful in electrical, aerospace, automotive, and mass trasit industries.

The following physical property information is based on typical values of the base Ultrason® E resin as well as test results obtained from actual film testing.

Applications Include:

  • Liquid crystal displays
  • Radomes
  • Magnet wire insulation
  • Hot melt adhesives
  • Flex circuitry
  • High temperature labels

Advantages of PES Film

  • High heat deflection and continuous use temperature
  • Exceptional tensile and flexural strength
  • High dielectric strength
  • Exceptional mechanical properties
  • Dimensionally stable at varying temperatures
  • Transparency
  • Hydrolytically stable

Manufacturing Capabilities:

Thicknesses and Widths:
.001” to .010” up to 27” wide
.011” to .029” up to 26” wide
all thicknesses available polished one side, matte the other (P/M)


Electrical Properties Test Method Result
Metric English
Surface Resistivity ASTM D257 > 1014 Ohms > 1014 Ohms
Dielectric Strength at 0.003 ASTM D149 181 V/µm 4600 V/mil
Dielectric Constant ASTM D150 3.5 1 kHz 3.5 1 kHz
Dissipation Factor ASTM D150 0.011 10 kHz 0.011 10 kHz
Mechanical Properties Test Method Result
Metric English
Tensile Strength at yield ASTM D882 72 MPa 10.5 kpsi
Elongation at break ASTM D882 52 % 52 %
Tensile Modulus ASTM D882 MPa kpsi
Flexural Modulus ASTM D790 2551 MPa 370 kpsi
Tear Strength – prop. ASTM D1004
Other Properties Test Method Result
Metric English
Specific Gravity ASTM D792 1.37 1.37
Water Absorption at 24 hours ASTM D570 0.7 % 0.7 %
Refractive Index 1.65 1.65
Haze ASTM D1003 % %
Area Factor 20000 in2/lb/mil
Thermal Properties Test Method Result
Metric English
Continious Use Temp. – UL 180 ºC 356 ºF
Heat Deflection Temp. at 264 psi ASTM D648 195 ºC 383 ºF
Melt Temp – DSC ºC ºF
Glass Transition Temp. ASTM D3418 225 ºC 437 ºF
UL Rating – UL94
L.O.I. ASTM D2862 38 % 38 %
NBS Smoke ASTM E662 DMax DMax


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