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Grade: High Density Polyethylene (HDPE)
Formula: HDPE
Form: Ball/Sphere
Material: Polyethylene (PE)
CAS Number: 9002-88-4
Commodity: Polymers
Diameter: 31.75mm
Color: Natural
HDPE Balls are characterized by their high tensile strength, excellent toughness, and resistance to environmental stress cracking, properties that make them exceptionally durable under mechanical and thermal loads. Their lightweight nature and stability contribute to wide adoption in industries such as construction, civil engineering, food packaging, and mechanical systems. Specifically, they are often integrated into structural composites where they act as void formers to reduce weight without compromising ductility, as well as in biomedical and industrial applications where wear resistance and impact absorption are critical. Technologies such as reinforced concrete beams, low-friction bearings, and advanced packaging systems benefit directly from their robustness and resistance to chemical degradation. HDPE Balls are also central to innovation in polymer composites, enabling the creation of lighter, more resilient materials that meet demanding performance requirements. In scientific and industrial contexts, their value lies in the combination of cost-effectiveness, adaptability, and proven performance across sectors, ensuring their continued role in engineering and materials research.
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Tolerances

Ball/Sphere
Diameter Standard ±5%
Diameter Precision See Item

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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