This method can be used to test the wear resistance of surfaces and coatings. Two rollers covered with emery paper rub against the rotating surface of the specimen and, by varying the grain size and the contact pressure, it is possible to simulate different degrees of loading. The data obtained from this test can normally only be transposed to the real part if the test conditions tally with those encountered in service. The test method is otherwise intended for a comparative assessment of different materials. The abrasion is specified in mm³, with allowance for the density of the test specimen. Together with other TPUs, Desmopan® counts as one of the most abrasion-resistant elastomer materials under service conditions. The abrasion loss is frequently reduced to a fraction, particularly when compared with other TPE classes. Hence the Desmopan® polyester grades that are frequently employed in abrasive applications display an abrasion loss of no more than 20 – 30 mm³. For the sports shoe industry, there are additionally the special grades of the S043 series, with particularly low abrasion loss. If processed carefully, these attain abrasion losses of between 15 and 20 mm³.
TPU is considered to be the elastomeric material that offers the highest resistance to abrasion under the conditions encountered in practice. This requires the granules to have been dried sufficiently prior to processing.
Standards: ISO 4649