ERTALYTE® PET-P (POLYETHYLENE TEREPHTHALATE POLYESTER)

ERTALYTE® PET-P (POLYETHYLENE TEREPHTHALATE POLYESTER)

Material Information

Ertalyte® PET-P is an unreinforced, semi-crystalline thermoplastic polymer based on the polyethylene terephthalate (PET-P). PET-P in general is known to have the best dimensional stability, excellent wear resistance, a low coefficient of friction, high strength and rigidity, excellent stain resistance, good chemical and abrasion resistance, and resistance to moderately acidic solutions. Ertalyte® PET-P has a continuous service temperature of 210º F and also retains significantly more of its original strength than nylon or acetal up to 180º F. Because of its low moisture absorption rate, Ertalyte® PET-P’s mechanical and electrical properties are virtually unaffected by moisture. These properties combined make Ertalyte® PET-P ideal for use in the manufacture of precision mechanical parts. It is available in a natural and black color in the form of rod and plate. Both colors are FDA compliant, but only the natural color is also USDA, 3A-Dairy and Canada AG compliant.

Application

  • Food processing
  • Equipment industries
  • Water and soft drink bottles
  • Process and test equipment manifolds
  • Carousels
  • Filter tracks
  • Rings, disks, rollers
  • Fuel pump components
  • Printing equipment

Properties

  • Superior dimensional stability
  • Excellent wear resistance
  • Low coefficient of friction
  • Very good chemical resistance
  • Low water absorption
  • Stain resistant
  • FDA compliant (natural and black)
  • USDA, 3A-Dairy, Canada AG compliant (natural)

Physical

Astm Test Method

PET-P (Ertalyte®)

Density (lb/in^3) D792 0.051
Specific Gravity D792 1.41
Water Absorption @ 24 hours (%) D570 0.07

Mechanical

Tensile Strength (PSI) D638 12,400
Tensile Modulus (PSI) D638 460,000
Tensile Elongation at Break (%) D638 20
Flexural Strength (PSI) D790 18,000
Flexural Modulus (PSI) D790 490,000
Compressive Strength (PSI) D695 15,000
Compressive Modulus (PSI) D695 420,000
Izod Impact (Notched), ft-lb/in D256 0.5
Rockwell Hardness D785 M93, R125

Thermal

Coefficient of Thermal Expansion,
10^-5/°F
D696 3.3
Heat Deflection Temperature 264 psi, ºF D648 240
Melting Point, °F D3418 491
Continous Service Temp (Operating), °F  - 210
Thermal Conductivity, BTU-in/hr-ft² °F F433 2
Flammability Rating UL94 HB

Electrical

Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 385
Volume Resistivity (ohm/square) D257 >10^13
Dielectric Constant at 60HZ D150 3.4
Dissipation Factor at 60HZ D150 -

NOTE:

The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.