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Grade: Low Density Polyethylene (LDPE)
Formula: LDPE
Form: Ball/Sphere
Material: Polyethylene (PE)
CAS Number: 9002-88-4
Commodity: Polymers
Diameter: 31mm
Color: Natural
LDPE Balls are characterized by their low density, flexibility, and chemical resistance, which stem from the polymer’s branched molecular structure. Their spherical form provides uniform geometry, mechanical stability, and ease of integration into diverse experimental and industrial systems. Industries including electrical insulation, packaging, and composites benefit from LDPE balls due to their lightweight nature, low moisture absorption, and insulating properties. Specific uses include serving as test media in dielectric performance evaluation, functional fillers in polymer nanocomposites, and reference components in tribological studies. Research demonstrates that LDPE composites fabricated with nanofillers such as SiO₂, MgO, or TiO₂ exhibit significantly enhanced dielectric strength, erosion resistance, and thermal stability, with ball-milling often used as a preparation technique. In both industrial and scientific contexts, LDPE Balls play a versatile role in material testing, additive development, and nanocomposite engineering, making them a valuable form of polyethylene for advanced applications.
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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-Poor
Greases and Oils Good-Fair
Halogenated Hydrocarbons Fair-Poor
Halogens Fair-Poor
Ketones Good-Fair
Electrical Properties
Element Value
Dielectric constant @1MHz 2.2-2.35
Dissipation factor @ 1MHz 1-10x 10⁻⁴
Dielectric strength( kV mm⁻¹ ) 27
Surface resistivity( Ohm/sq ) 10¹³
Volume resistivity( Ohmcm ) 10¹⁵-10¹⁸
Physical Properties
Element Value
Flammability HB
Radiation resistance Fair
Refractive index 1.51
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 17
Water absorption - over 24 hours( % ) 0.015
Density( gcm⁻³ ) 0.92
Mechanical Properties
Element Value
Hardness - Rockwell D41-46 - Shore
Elongation at break( % ) 400
Tensile modulus( GPa ) 0.1-0.3
Izod impact strength( J m⁻¹ ) 1000
Tensile strength( MPa ) May-25
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 50
Heat-deflection temperature - 1.8MPa( C ) 35
Lower working temperature( C ) -60
Upper working temperature( C ) 50-90
Specific heat( J K⁻¹ kg⁻¹ ) 1900-2300
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.33@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 100-200

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