HDPE (HIGH DENSITY POLYETHYLENE)

HDPE (HIGH DENSITY POLYETHYLENE)

Material Information

HDPE is a thermoplastic that belongs to the polyolefin group of materials. HDPE is used for the largest portion of polyethylene applications, and has much more rigidity and tensile strength than LDPE, but impact strength is slightly lower due to its stiffness. Overall, HDPE offers excellent impact resistance, is lightweight, has low moisture absorption, and has high tensile strength. It is also non-toxic, non-staining, and meets FDA and USDA certification. This makes HDPE ideal for food processing. HDPE is available in sheet, strip, rod, tube, and film.

Application

  • Packaging for food and household liquid products
  • Film products
  • Industrial containers
  • Housewares
  • Tote boxes
  • Water and gas distribution pipe
  • Wire insulation
  • Structural foam housings
  • Agriculture
  • Structural tanks
  • Industrial piping systems
  • Washers and stampings

Properties

  • High rigidity
  • High tensile strength
  • High impact resistance
  • Light weight
  • Low moisture absorption
  • Property values remain high at low temperatures

Physical

Astm Test Method

HDPE

Density (lb/in^3) D792 0.035
Specific Gravity D792 0.95
Water Absorption @ 24 hours (%) D570 0

Mechanical

Tensile Strength (PSI) D638 4,600
Tensile Modulus (PSI) D638 -
Tensile Elongation at Yield (%) D638 900
Flexural Strength (PSI) D790 -
Flexural Modulus (PSI) D790 200,000
Izod Impact (Notched), ft-lb/in D256 3
Shore D Hardness D785 D70

Thermal

Coefficient of Thermal
Expansion, 10^-5/°F
D696 6
Heat Deflection Temperature 264 psi, ºF D648 170
Melting Point, °F D3418 260
Continous Service Temp (Operating), °F  - 180
Flammability Rating UL94 HB

Electrical

Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149 450-500
Arc Resistance (sec) D495 200-250
Volume Resistivity (ohm-cm) @ 50% RH D257 10^15
Dielectric Constant at 1 kHz D150 2.30-2.35
Dissipation Factor at 1 kHz D150 0.0002

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.