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Grade: Low Density Polyethylene (LDPE)
Formula: LDPE
Form: Disk
Material: Polyethylene (PE)
CAS Number: 9002-88-4
Commodity: Polymers
LDPE Disk is defined by the low density, flexibility, and dielectric stability of polyethylene, while its machined circular form ensures uniformity and reliability in controlled testing and device integration. Its chemical resistance, low moisture absorption, and electrical insulation capacity make it particularly valuable in experimental setups and material engineering. Industries such as electrical insulation, packaging, and polymer processing benefit from LDPE disks due to their reliability and performance under diverse conditions. Specific applications include dielectric testing platforms in electrical insulation research, structural components in foamed composite laminates, and use in contact studies for surface charge and potential distribution. Research shows that LDPE disks exhibit predictable surface potential behavior under electrical stress, making them highly relevant in insulation diagnostics, while foamed LDPE-based laminates offer enhanced resilience in packaging and protective composites. In both industrial and scientific contexts, LDPE Disk serves as a standardized and versatile form of polyethylene that supports advancements in insulation technology, packaging innovation, and applied polymer research.
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Tolerances

Disc
Thickness ±20%

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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