Experimental method of operation and result evaluation of Martindale abrasion tester

The Martindale Abrasion Tester occupies an important place in the textile pilling test experiment and is also commonly used in the friction resistance test of other materials. The engineers of Standard Group (Hong Kong) Co., Ltd. will in this article make it simple for you An introduction to the experimental working method and result evaluation method of the Martindale Abrasion Tester.

1. Method
1. Sample preparation Different standards require a certain time period. For example 24 hours (GB/T 4 80 2 .2-19 97), 16 hours (EN ISO 12947-4:1998)
2. Selection of samples
Cut from different parts of the whole door fabric Take a sample, the sample must be representative. If it is a beautiful fabric, the sample should include all the different textures and colors presented by the fabric surface;
3. Remove the load and load shaft from the testing machine;
4. Remove the toplate and test setup;
5. Example device:
Loosen the retaining ring on the test fixture, remove the hold-down piece from the sample and place the sample in the test fixture base. When the tested fabric is not more than 500 g/m2, a piece of polyester foam is placed between the sample and the metal block of the sample clamp; when it is more than 500 g/m2, or a composite fabric, no foam is required. The samples on each sample holder must be subjected to the same voltage.
6. Installation of wool felt and abrasive cloth:
Put the felt and abrasive on the grinding table, put the weight on the abrasive, then put the pressure ring on it and tighten the nut so that the pressure ring abrasives are fixed on the grinding table.
7. Place the grinding head on the abrasive and apply pressure;
8. Place the test fixture with the sample facing down on the base fixture and align the circular groove of the test fixture.to align with the load shaft so that the load shaft is inserted into the circular groove of the test fixture;
9. Set the number of times according to the standard, start the switch, start the test, and automatically stop after reaching the set number of times:
10. Collect the sample and compare it to the standard sample in the assessment box.
2. Matters requiring attention in the operation of the Martindale Abrasion Tester:
1. The friction cloth cannot be used repeatedly. A rubbing cloth must be replaced each time a test is completed;
2. Wool felt can be used repeatedly. If the surface is worn or stained, it can be replaced and can be used on both sides;
3. The insole should be dressed first and then cleaned. Martindale abrasion test;
4. After the test is completed, if the surface table of the sample has abnormal phenomena such as wear,broken yarn, pilling or severe pilling, severe wear, etc., it will be judged as non-qualified. 5. When preparing samples, special attention should be paid to prevent hair changes on the cutting edges, so as to avoid unnecessary loss of quality and appearance changes.
6. Pay attention to operating specifications and personnel safety while using the instrument.
Third, the evaluation of the wear resistance of the fabric
The evaluation of the wear resistance of the fabric, usuallyThere are the following methods:
1. Observing the change of appearance properties
Generally speaking, under the same test conditions, after a specified number of abrasions, observe the surface gloss, lint, pilling and other appearance effects of the sample The change is usually compared with the standard sample for its rank to evaluate. It is also possible to anumber of rubs required to make a certain number of sand lines break on the surface of the sample after wear, or to make holes of a certain size appear on the surface of the sample as a basis for evaluation.
2. Determination of changes in physical properties
After the sample has been worn for a certain number of times, the changes in physical and mechanical properties such as weight, thickness and breaking strength are measured to determine the degree of abrasion resistance of the fabric.

More about the Martindale Abrasion Tester: http://www.abrasiontesters.com

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