Why this test matters
Powders can accumulate electrical charge during handling, transport, or processing. This charging can lead to flow instability, particle adhesion, segregation, or even safety hazards such as electrostatic discharge. The GranuCharge triboelectric test helps companies understand and control these risks before they impact production or safety. It supports safer processes, stable material flow, and consistent product quality. The test is relevant for additive manufacturing powders, pharmaceuticals, chemicals, food powders, and battery materials.
How the test works
The GranuCharge test simulates powder flow through equipment surfaces where triboelectric charging occurs. A defined quantity of powder flows through a tube made of a selected material under controlled conditions. During flow, the powder exchanges electrical charge with the tube surface. An electrometer measures the resulting charge at the outlet. Key parameters include flow rate, test duration, tube material, ambient temperature, and relative humidity, which strongly influence charging behavior.
What you learn from this test
The test provides quantitative values of electrostatic charge per unit mass. These results reveal how prone a powder is to charging and how sensitive it is to environmental or material changes. Companies use this information to compare powders, select suitable contact materials, and define safe operating conditions. The insights support informed decisions related to process stability, product quality, and electrostatic risk mitigation.
