Abrasion Resistance Test Method of Leather

This test method covers the determination of the abrasion resistance of leather using the rotary platform abraser. NOTE 1—This test method is similar but not equivalent to ISO 17076-1,and results should not be directly compared between the two methods. Summary of Test Method： A specimen is abraded using rotary rubbing action under controlled conditions of pressure and abrasive action. The test specimen, mounted on a turntable platform, turns on a vertical axis, against the sliding rotation of two abrading wheels. One abrading wheel rubs the specimen outward toward the periphery and the other, inward toward the center. The resulting abrasion marks form a pattern of crossed arcs over an area of approximately 30 cm2. Resistance to abrasion is evaluated by visual inspection of damage to the specimen or change in weight, as described in Section 14. Procedure: 1、Test Conditions—Carry out the test in an atmosphere defined in 12.1, unless otherwise agreed upon between the interested parties. 2、Mount the wheels (see 9.4) on their respective flanged holders, taking care not to handle them by their abrasive surfaces. Prior to testing, ensure that the wheels have been resurfaced according to Section 10. 3、Select the load to be used and affix it to the rotary platform, double head tester (see 9.1). 4、If using a weight loss method of evaluation, weigh the test specimen to the nearest 0.1 mg and record this weight.The specimen should be weighed after mounting on the mounting card, if used. 5、Mounting of Specimen—Place the test specimen face up, over the rubber mat on the turntable platform. Secure the clamp plate and nut in place to hold the center of the specimen.The clamping ring may also be used to secure the specimen, if needed. Avoid buckling the leather when tightening. If the specimen holder was previously removed, ensure the holder is properly replaced on the drive shaft of the abraser prior to testing. 6、Lower the pivoted arms carefully until the wheels rest on the surface of the specimen. 7、Cleaning of Specimen During Test—The rotary platform abraser vacuum system is used to clean the specimen of debris and abrasive particles during the test. Position the vacuum pick-up nozzle as outlined in 9.2 and adjust vacuum suction force as outlined in 9.3. 8、Set the counter at zero and program the appropriate number of cycles. If the number of cycles has not been predetermined by mutual agreement between the interested parties, test for 1,000 cycles. 9、Start the rotary platform abraser and subject the test specimen to abrasion for the specified number of cycles or until wear through of the coating is observed. To determine the point of wear through, stop the instrument at predetermined intervals(for example, 25 cycles) for examination of the test specimen. 10、Cleaning of Specimen After Test—After the test is complete, a soft bristle brush may be used to remove any loose abradings remaining on the test specimen. 11、After testing, raise abraser arms and vacuum pick-up nozzle, then remove the specimen for evaluation. If desired, the turntable platform may be removed from the tester by lifting straight up. This will permit a closer inspection of the specimen prior to removal from the turntable platform.