What are the commonly used test methods for abrasion resistance of leather materials?
The leather abrasion resistance test method is a long-standing test type in the leather and shoe material industry. Currently, the commonly used test methods include Martindale Abrasion Tester, Taber Abrasion Tester, STROLL Abrasion Tester and Rubber Abrasion Tester, etc. This article Give a brief introduction to the following methods.
1. Martindale abrasion resistance method
Martindale abrasion resistance method is often used for the abrasion resistance test and pilling evaluation of textiles, my country's national standard GB/T3903.16-2008 'Shoe upper, lining and inner cushion test 'Method Abrasion Performance' stipulates the test method of using the Martindale method to test shoe uppers, and it is also applicable to the test of the abrasion performance of automotive leather.
The Martindale abrasion method is used, and the sample is rubbed with a standard rubbing fabric under constant pressure. The relative movement of the Li Sharu pattern between the rubbing fabric and the sample produces friction in all directions. After completing the specified number of rubbings, evaluate the degree of damage to the sample.
2. TABER abrasion resistance method
American standard ASTM D 3884-2009 'Standard test method for abrasion resistance of textile fabrics (TABER apparatus)' stipulates the TABER abrasion resistance method. The test principle of the TABER abrasion method is: the test sample is placed on a rotating platform, and the two rolling friction wheels above it perform a rotating friction movement with the sample under a certain load to wear the sample. One friction wheel faces outward, and the other friction wheel faces inward to rub the sample, forming a circular wear mark. After the specified number of rubbings, the degree of wear of the sample is evaluated by appearance.
Operation process:
fix the sample face up on the rotating platform, and install the selected grinding wheel on the supporting rod. After selecting a suitable load, lower the support rod to make the grinding wheel contact the surface of the sample, connect and open the dust suction device. Start the instrument and test according to the number of revolutions set by the counter. After the test is over, remove the sample, check and record the abrasion of the sample, and use the gray sample card according to GB/T 250-2008 'Textile color fastness test to evaluate the color change gray sample card'.
3. The STROLL abrasion resistance method
It is based on ASTM D 3886-1999 'Standard test method for abrasion resistance of textile fabrics (inflated diaphragm apparatus)'. The test principle of the STROLL abrasion resistance method is that the tested sample is placed on an inflatable rubber diaphragm with a constant air pressure. , Use sandpaper with specified surface characteristics to rub the sample.
After the specified number of rubbings, the degree of wear of the sample is evaluated by appearance.
Operation steps:
Place the sample on the rubber film in a flat state, then place the sandpaper on the abrasive plate, and make the contact head connected with the sandpaper flush with the surface of the sandpaper. Then apply 28 kPa of air pressure under the diaphragm and 454 g of pressure above the abrasive plate, and ensure that the air pressure control and the contact between the inflated sample and the loaded sandpaper are in a stable and balanced state. Start the instrument and test according to the number of revolutions set by the counter. After the test, remove the sample, check and record the wear condition of the sample, and use the gray sample card to evaluate the color change in the test area according to GB/T 250-2008 'Textile color fastness test-gray sample card for evaluating discoloration'. During operation, place a piece of polyurethane foam with a thickness of (3±1)mm and a density of (30±3)kg/m3 on the back of the sample, and fix the sample on the grinding head with a clamp ring, and then set the table felt Place it on the grinding table, then place the friction fabric on the table felt, and place the weight that generates (2±0.2) kPa pressure on the friction fabric, and then fix the friction fabric. Finally, install the grinding head on the wear tester, apply a pressure of (12±0.2) kPa to the grinding head, start the instrument, and perform the test according to the number of rotations set by the counter. After the test, remove the sample, check and record the wear condition of the sample, and use the gray sample card to evaluate the color change in the test area according to GB/T 250-2008 'Textile color fastness test-gray sample card for evaluating discoloration'.
Rubber Abrasion Tester is used to measure the abrasion resistance of rubber tires, rubber shoes, tapes, etc. to identify the quality of rubber products. During the test, the rubber is rubbed with the gauze on the roller under a certain load, and the abrasion of the sample within the specified stroke is measured. Meet the requirements of GB9867, ISO4649 and DIN53516. At present, there are many suppliers of rubber abrasion testing machines on the market, with varying quality and prices. Customers don’t know what kind of rubber abrasion testing machine to buy when they buy. Kunshan Crete Testing Instrument Co., Ltd. has been specialized in producing rubber abrasion testing machines for decades. Here we solemnly recommend the rubber abrasion testing machines produced by our factory. . The main technical specifications of the rubber wear tester:
roller diameter: 150±0.2mm
roller length: 500mm
roller speed: 40±1r/min
sample used: diameter: 16±0.2mm, thickness not less than 6mm sample holder traverse Speed: 4.2±0.06mm/r
Grinding stroke length: 20m or 40m
Sample grinding speed: 0.9r/min or without rotating Self-load: 2.5N (generated by sample holder and cantilever)
Sample load can be adjusted to weight: 5N, 7.5N, 10N (with three attached weights)
output power: AC220V 50Hz
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