Can I use graphite as a conductive additive in paints?

Yes. Synthetic or flake powders improve electrical conductivity and, in lubricant formulations, reduce friction in plastics and coatings. Particle size and purity are matched to the resin system.

What does graphite contribute to a plastic compound?

Lubrication distributed through the whole mass and greater dry-friction wear resistance. As the part wears, the exposed surface still contains lubricant, which a surface treatment cannot achieve.

How is the loading defined?

By testing the actual compound, because loading simultaneously affects friction, mechanical strength, and processability. Increasing it improves lubrication but can compromise the part.

Does it work with any polymer?

Compatibility and acceptable loading depend on the matrix and the conversion process. Both are stated when selecting graphite particle size and purity.

Graphite powder as a lubricant additive in a plastic compound

Additives / Formulation

Plastics lubricant additive

Improves the sliding properties of plastics in industrial applications.

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Polymer compound additive

Also known as: Graphite as an additive for plastics · Lubricating filler for polymer compounds · Anti-friction additive for thermoplastics · Graphite for plastic friction parts

[ Technical summary ]

A plastic part working in dry friction depends on what happens at its own surface, because there is no external lubricant to protect it. Adding graphite to the compound distributes the solid lubricant through the whole mass, so wear keeps exposing lubricated material instead of leaving the part unprotected. It is the usual route for injection-moulded bushings, gears, and guides that must run maintenance-free.

[ Problem it solves ]

Give the plastic part its own lubrication distributed through its mass, so that wear does not leave it unprotected in a service with no external lubricant.

Operating conditions

Plastics compounding
Injection and extrusion
Dry-friction parts

When it is suitable

The part works in dry friction with no external lubricant
Wear of the plastic part is premature
The design requires maintenance-free operation
The compound accepts a solid filler without losing processability

When it may not be suitable

The formulation requires a light colour or transparency
The effect cannot be validated with tests on the actual formulation
The loading required would reduce mechanical strength below what is needed

Process challenges

High friction in plastic parts
Premature wear
Need for external lubrication

Advantages

Internal/external lubrication
Wear improvement
Thermal stability of graphite

Limitations

Not a hydrodynamic oil lubricant
May stain light-colored surfaces
Performance depends on surface preparation and reapplication

[ Critical selection variables ]

These variables define the grade and the geometry. Actual values are confirmed against the grade datasheet.

Base matrix or resinDecisive
Dosage and application frequencyDecisive
Particle sizeDecisive
Operating temperatureRelevant
Load and its distributionRelevant
Sliding speedRelevant

[ Required material properties ]

Properties that guide selection. Numerical values come from each grade's datasheet.

Critical properties

Friction coefficient
Particle size distribution
Self-lubrication
Dispersibility

Secondary properties

Wear resistance
Thermal conductivity

[ Related ]

[ Frequently asked questions ]

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Technical content reviewed by ESGRAF — Last reviewed: September 8, 2026

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