TAPPI T815

Test Materials: In TAPPI T815, the test materials typically include paper, board, or other materials with a smooth or rough surface whose coefficient of friction is to be measured. The materials should be prepared to the specified condition, usually under controlled temperature and humidity to ensure consistent results.
Test Process: The test involves tilting a sample surface at a gradual angle until a stationary object begins to slide. The angle at which sliding occurs is noted, and the coefficient of friction is calculated as the tangent of that angle, as specified by TAPPI T815.
Test Result Interpretation: The coefficient of friction is a numerical value derived from the tangent of the angle at which sliding starts. Higher values indicate more resistance to sliding, which can impact material performance in applications like packaging or printing.