San Diego Plastics
2220 McKinley Avenue
National City  CA  91950
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PES
(polyethersulfone)
Download Product Brochure (39kb - pdf) 

High resistance to heat and combustibility, low smoke emission, and transparency are the combination of properties possessed by stock shapes extruded from PES. These, coupled with light weight, good impact resistance, dimensional stability, and chemical resistance, make stock shapes extruded from PES resin useful in the electrical/electronics, aerospace/aircraft, automotive, and mass transit industries. PES stock shapes are also applicable for heat and fire safety, food service, and hospital and health care items.

The following physical property information is based on typical values of the base polyethersulfone resin (PES).

 
Mechanical Properties
  Units ASTM Test Result
Tensile Strength @yeild psi D638 12,000
Tensile Strength @break psi D638 -
Tensile Modulus psi D638 385,000
Tensile Elongation @yield % D638 5.5
Tensile Elongation @break % D638 50.0 - 100.0
Flexural Strength @yield psi D790 16,100
Flexural Modulus psi D790 420,000
Compressive Strength @ yield psi D695 14,500
Compressive Modulus psi D695 388,000
Izod Impact Strength Un-notched ft·lbs/in D256 no break
Izod Impact Strength Notched @ 73°F ft·lbs/in D256 1.6
Hardness (R, M, L or D) - D7852 R127

 
Thermal Properties
  Units ASTM Test Result
Heat Deflection Temp. @66 psi °F D648 417
Heat Deflection Temp. @264 psi °F D648 399
Coefficient of Thermal Expansion in/in/°F D696 2.7 X 10-5
Flammability Rating-UL94 @.031" - - V-0
Thermal Conductivity (BTU•in)/(hr•ft2•°F) C177 1.13
Limiting Oxygen Index % D2863 39.3

 
Electrical Properties
  Units ASTM Test Result
Dielectric Strength V/mil D149 380
Dielectric Constant @ 1kHz - D150 3.50
Dissipation Factor @ 1 kHz - D150 0.0022
Volume Resistivity ohm•cm D257 1.7 x 1015

 
Optical Properties
  Units ASTM Test Result
Haze % D1746 8.0
Transparency % D1746 76

 
Other Properties
  Units ASTM Test Result
Specific Gravity - D792 1.37
Water Absorption @24 hours % D570 1.85
 

 
Applications Include:
• Printed circuits
• High intensity light bases
• Safety face shields
• Machine guards
• Connectors

 
Advantages of PES:
• Low smoke generation
• Excellent electrical properties at elevated temperatures
• Transparency
• Excellent chemical resistance
• Easily machined

Manufacturing Capabilities:
Rod: 3/16” to 6” diameter
Sheet: .035” to 4” thick
Film: .001” to .029” thick
Slab: 1/4” to 4” thick

 
Color/Grades:
Transparent (custom colors available)

 
*In addition to our standard capabilities, Westlake also has the ability to process custom resins in various sizes and colors with some exceptions.

 


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