CoolPoly E-series Thermally Conductive Plastics exhibit
electrical conductivity in addition to their thermal conductivity.
The electrical conductivity measured as electrical resistivity is
commonly in the range 0.1 to 10,000 ohm-cm. This conductivity
range is appropriate for shielding electromagnetic and radio
frequency energy. CoolPoly E-Series plastics can also be modified
to achieve lower levels of electrical conductivity for
applications requiring electrostatic dissipation (106
ohm-cm). For comparison purposes, unmodified plastics are good
electrical insulators (1012
ohm-cm) and metals are good electrical conductors (10-6
Conventional plastics are considered thermal insulators. The
thermal conductivity of CoolPoly E-series plastics range from 1.0
W/mK to 100 W/mK. This exceptional level of thermal conductivity
in a plastic is 5 to 500 times the value of conventional plastics.
The optimal level of thermal conductivity for any application
depends on the power input, size of the part and the convection
conditions. Celanese technical service staff can help
engineers determine the appropriate materials for their
application and heat transfer requirements.
CoolPoly E-series combines thermal
conductivity and electrical conductivity in standard pellet form
suitable for thermoplastic injection molding and other processes
(e.g. extrusion). CoolPoly E-Series plastics are available in bag,
drum, and Gaylord packaging.
Common uses for
CoolPoly E-Series plastics include heatsinks, enclosures, lighting
and heat exchangers. E-Series plastics are also commonly chosen in
applications in which the level of electrical conductivity or
electrical insulation is unimportant.
E-Series plastics are characterized for their volume and surface
resistivity in addition to their thermal, mechanical, and physical