Key principles.
> 10¹² Ω/sq
Standard plastics. Surface resistivity > 10¹² Ω/sq. Standard insulator.
10⁹-10¹² Ω/sq
Static-dissipative. Slow charge dissipation. Electronics packaging.
10⁶-10⁹ Ω/sq
Static-dissipative materials. ESD-safe workstation materials.
< 10⁶ Ω/sq
Conductive plastics — carbon-loaded. Specialty applications.
Black
Carbon black or carbon nanotube fillers. 5-25% loading.
PEDOT, polypyrrole
Conducting polymers. Specialty (sensors, displays).
FAQ
Electronics handling — IC trays, packaging. Prevents static damage to sensitive components.
Carbon: cheaper, lower conductivity, doesn't affect color much. Metal: higher conductivity, more expensive.
Surface for static dissipation. Volume for through-thickness conductivity. Different applications.
ANSI/ESD S20.20 standard. Resistivity per ASTM D257. Charge decay per FTM 4046.
Carbon fillers force black color. Metal fillers can be lighter. Pure conducting polymers various colors.
ESD-safe grades 30-100% premium over standard. Worth it for ESD-sensitive applications.
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