What is a friction tester?
A friction tester is also known as a coefficient of friction tester. This tester makes a measurement of a sheet-like substrate such as paperboard, plastic film or paper which regulates the angle of inclination at which one substrate affixed to a sled will begin to slide against the surface of an additional substrate.
Friction testers are the most comprehensive tool available for measuring the coefficient of friction of materials. This a flexible instrument that can also be used to measure and display the frictional values of any flat surface including coated metals and therefore allows this tester to be multi-purpose.
On the other hand, to provide static and dynamic slip values for a surface, the instrument allows the full friction force output to be displayed and also stored and compared. This is an exclusive and exceptional ability which helps a manufacturer to relate the feeding and running speeds of a product to its surface characteristics.
How is friction measured?
A sample with weight acting over the entire surface area is moved over another sample at a given speed. The static and dynamic coefficient of friction is automatically calculated and displayed on the screen.
Measuring the friction on a friction tester
Friction testers measure both static and dynamic coefficients of friction. Static friction is the initial force required to make two surfaces slip against each other and dynamic friction is the on-going force required to maintain movement between two surfaces.