Test method for abrasion resistance of leather heel surface
my country's current standard for leather shoe heels QB/T 3643-1999 'Leather Heel Surface' stipulates the wear resistance of leather heel surfaces using the standard method of GB/T 3903.2-1994 'General Test Method for Footwear Wear Test Method'. However, in actual operation, some materials (especially the heel surface of women's shoes) cannot produce wear marks under the gears or the wear marks are not clear with the national standard method, so that quantitative results cannot be obtained. 1. Commonly used test methods for wear resistance At present, the wear resistance test of sole materials usually includes GB/T 3903.2-2008 'General Test Methods for Wear Resistance of Footwear', GB/T 9867-2008 'Abrasion Resistance of Vulcanized Rubber or Thermoplastic Rubber' Determination of performance (rotating roller abrasion machine method)', GB/T 1689-1998 'Determination of abrasion resistance of vulcanized rubber (using Akron abrasion machine)', ASTM D1630-2006 'NBS rubber abrasion resistance' and by many There are 5 test methods used by enterprises and quality inspection departments, including the wear resistance test method of Dongguan Hengyu Instrument Co., Ltd. Among them, GB/T 1689-1998 'Determination of Abrasion Resistance of Vulcanized Rubber (Using an Akron Abraser)' applies to vulcanized rubber, and is not applicable to plastic and polyurethane materials widely used in women's shoe soles. However, the ASTM D1630-2006 'NBS Rubber Abrasion Performance' method has a large requirement on the size of the sample, and the heel surface area of many women's shoes cannot be reached, and the surface of the sample is required to be flat, and the general sole is difficult to meet the requirements, so this method is not suitable. Abrasion test of the material of the heel surface. The other three methods are theoretically feasible to test the wear resistance of the leather heel surface, but further experiments are required for the specific results. 2. Experimental method The three kinds of heel surface materials were tested for wear resistance with different test methods, and the test results were compared and analyzed, and a test method of the most applicable heel surface material was selected. Then use the selected method to carry out the physical test of the wear resistance of the specified heel surface material, and at the same time, use the same material to make the heel surface of the shoe to carry out the try-on experiment, and compare the physical test results with the actual try-on results. To verify the feasibility and accuracy of the test method. 1. Comparison of different test methods (1) Use GB/T 3903.2-2008 'Footwear - General Test Methods - Wear Resistance' to test. Test principle: The rotating grinding wheel is vertically pressed on the sample, and the wear test is carried out on the sample under specific conditions, and the length of the wear scar of the sample is measured to indicate the wear resistance of the sample. ⑵ Use GB/T 9867-2008 'Determination of Abrasion Resistance of Vulcanized Rubber or Thermoplastic Rubber (Rotating Roller Abraser Method)' for testing. Test principle: At a specified contact pressure and a certain area, measure the wear amount of the cylindrical sample caused by friction on a certain level of gauze and within a certain distance. (3) The test is carried out using the Tianpi abrasion resistance test method 'Implementation Rules for Tianpi Abrasion Resistance Testing' of Dongguan Hengyu Instrument Company. Test principle: Put the leather heel surface material on sandpaper, rub it under the conditions of specified load and friction times, and measure its wear thickness. 2. Verification of the selected test method (1) The physical test experiment adopts the test method for the wear resistance of the heel surface material selected in the experiment in the previous step. result. (2) Try-on experiment The heel surface of the finished shoe is made of the same 7 kinds of heel surface materials as the above physical test experiment, and the try-on experiment is carried out on the finished shoe. The heels of 3 materials were installed on the same style of women's shoes to make 12 pairs of shoes for 4 female testers of standard foot size, and each tester tried on 3 pairs of women's shoes with different heel materials. The other 4 heel materials made 4 pairs of men's shoes, which were tried on by a male tester with a standard foot size. The try-on period is 2 months, during which each pair of shoes is worn in rotation. The try-on environment is the environment of daily life, including daily work, home, going out, etc., excluding special environments such as sports and travel. (3) Comparison of physical test results and try-on experiments Compare the results of physical tests with the results of try-on experiments to verify the feasibility and accuracy of testing the wear resistance of heel surface materials with the selected test method. 3. Conclusion By comparing the test results of physical properties of several test methods and comparing with the test results, it can be seen that GB/T 9867-2008 'Determination of Abrasion Resistance of Vulcanized Rubber or Thermoplastic Rubber (Rotating Roller Type' Wearing machine method)' method is suitable for testing a variety of leather heel surface materials. The results of this research can provide a basis for formulating relevant method standards and provide guidance for quality control in the actual production of enterprises.
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