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Grade: High Density Polyethylene (HDPE)
Formula: HDPE
Form: Rod
Material: Polyethylene (PE)
CAS Number: 9002-88-4
Commodity: Polymers
HDPE Rod is distinguished by its high strength-to-weight ratio, resistance to chemical corrosion, and low moisture absorption, making it a reliable engineering polymer for machining and structural applications. Its toughness and impact resistance, combined with excellent processability, allow it to be shaped into precision components across numerous sectors, including civil engineering, petrochemicals, and mechanical systems. In practical use, HDPE rods are often employed in wear-resistant bearings, corrosion-resistant piping elements, and electrical insulation parts. Ultrasonic evaluation has shown that oriented HDPE rods provide superior acoustic properties, beneficial for sensing technologies and non-destructive testing. In oilfield engineering, HDPE rods are incorporated into lined tubing systems, where they mitigate corrosion and extend operational lifetimes in rod-pumped wells. Additionally, advances in polymer blending and recycling have opened new pathways for HDPE rod innovation, making them integral to lightweight structural composites and sustainable material solutions. In both scientific and industrial contexts, HDPE Rod stands out for its durability, adaptability, and proven role in advancing high-performance polymer technologies.
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Tolerances

Rod
Diameter +20% / -10%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair
Greases and Oils Good-Fair
Halogenated Hydrocarbons Fair-Poor
Halogens Fair-Poor
Ketones Good-Fair
Mechanical Properties
Element Value
Coefficient of friction 0.29
Hardness - Rockwell D60-73 - Shore
Poisson's ratio 0.46
Tensile modulus( GPa ) 0.5-1.2
Izod impact strength( J m⁻¹ ) 20-210
Tensile strength( MPa ) 15-40
Electrical Properties
Element Value
Dielectric constant @1MHz 2.3-2.4
Dissipation factor @ 1MHz 1-10x 10⁻⁴
Dielectric strength( kV mm⁻¹ ) 22
Surface resistivity( Ohm/sq ) 10¹³
Volume resistivity( Ohmcm ) 10¹⁵-10¹⁸
Physical Properties
Element Value
Flammability HB
Radiation resistance Fair
Refractive index 1.54
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 17
Water absorption - over 24 hours( % ) 0.01
Density( gcm⁻³ ) 0.95
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 75
Heat-deflection temperature - 1.8MPa( C ) 46
Upper working temperature( C ) 55-120
Specific heat( J K⁻¹ kg⁻¹ ) 1900
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.45-0.52@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 100-200

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