TAPPI T549 coefficient of friction for paper
Friction in paper and paper compounds (coefficient of friction) is important for their further processing in automatic systems. When measuring the coefficient of friction, characteristic values such as static and dynamic friction are determined.
The standard TAPPI T549 describes a method to determine static and dynamic coefficients of friction of uncoated writing and printing paper to the horizontal plane method.
ZwickRoell has a Tappi T549 test device and programs for determining both values. These provide the user with reliable values and help in finding a solution to packaging or printing problems. The coefficient of friction can be measured as "paper against paper" or "paper against other material".
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Measuring the coefficient of friction to Tappi T549 with ZwickRoell
With the ZwickRoell device, the frictional behavior between paper against paper as well as paper against other material can be determined using the “horizontal plane method”.
With this method, the static and dynamic friction coefficient is determined using a slide. A paper specimen is clamped on the slide. A second specimen can be clamped to the device’s stainless steel test table or onto the included glass plate, which is placed on the stainless steel table.
The friction device to Tappi T549 enables the specimen to be fixed more quickly.
The test device can be used in a universal testing machine from the zwickiLine, ProLine, and AllroundLine series, which in turn can also be used for all other tests on paper, cardboard, and tissue.
The ZwickRoell testing software determines friction properties such as static and dynamic friction, peak values, and upper and lower averages of the peaks. In one operation the user obtains the results needed to enable further processing of the materials.
