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Coefficient of Friction (COF) Test Fixture | TestResources

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Coefficient of Friction (COF) Test Fixture | TestResources

In many applications it is important to know the amount of friction created by a plastic object. Friction can be characterized by static friction, and kinetic friction. Static friction of plastic is present when two objects are in contact but not sliding across each other. Kinetic friction is a resistance friction that is present during sliding motion between two objects. The coefficient of friction is dependent on the surface conditions of both materials that are in contact.

ASTM D1894 and ISO 8295 cover the testing methods to determine the coefficient of plastic materials. The test involves pulling a weight with a plastic specimen between the weight and the ground. The force required to do so can be measured and a coefficient of friction is then determined.

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