Dust Martindale Abrasion Test Experimental procedure

Abrasion resistance is an important index of the quality of textile products, which directly affects the durability and use effect of the product. Specifically, it refers to the property of resistance to abrasion between fabrics or with other fabrics in the process of repeated friction. There are many methods to test the abrasion resistance of textile products, such as surface grinding, curved grinding, hem grinding and compound grinding. The Martindale method is a kind of surface grinding method, which is widely used in the detection of wear resistance of clothing, home textiles, decorative fabrics and upholstery fabrics.

1. Determination of sample damage
This method is applicable to all textile fabrics, but not suitable for short-life fabrics.
1. Selection of abrasives.
Select different standard abrasives according to the characteristics of the sample. Uncoated fabric: woven woolen fabric, coated fabric: No. 600 wasandpaper. The abrasive material and the grinding table are separated by wool felt. After the test, check the surface of the felt. If there are stains or wear, it should be replaced in time. 2. Sampling method.
Minimum 3 pieces, the woven fabric must contain different warp and weft yarns. Jacquard fabric or fancy weave should contain all the signature parts of a complete weave. If a complete weave or pattern is large, each part can be sampled individually.
3. Selection of sample fixture liner.
Determine the mass per unit area of ​​the sample, the unit area of ​​the sample is ≥500g/m2, no foam liner is required, the unit area of ​​the sample is <500g/m2, and a foam plastic liner is installed in the sample fixture. The foam liner was replaced before each run. 4. Selection of the total effective mass of frictional load.
The total effective mass of the frictionload includes the mass of the container, the stainless steel disc and the weight of the sample. According to the technical parameters of the Atlas M235 Martindale Abrasion Resistance and Pilling Tester, the mass of the container: (200 ± 1) g; the mass of the stainless steel disc: (260 ± 1) g; the mass of the sample weight : (395±2)g, (594±2)g. Depending on the use of the sample, select the corresponding friction load according to the characteristics of the sample There are three kinds of total effective mass: 1) (795 ± 7) g: suitable for workwear, furniture upholstery, bedding products, industrial use Fabric;
2) (595±7)g: suitable for clothing and home textiles (upholstery, bedding), wear-resistant coated fabrics;
3)(198±2)g : Coated fabric suitable for wearing.
5. Abrasive replacement cycle
Standard wool cloth: 50,000 times; standard water sandpaper: 6,000 times.
6. Inspection interval
Estimate the number of friction times when het sample reaches the fracture, and design an appropriate inspection interval on this basis, as a test of the sample surface wear condition during the sample wear resistance test Observation points, the inspection interval is a certain number of friction times.
7. The measurement result indicates the total number of rubs when each sample is damaged, and the number of rubs accumulated before the sample is damaged is taken as the number of abrasions.

2. Determination of mass loss
Applicable to all textile materials, but not suitable for short-life fabrics. The selection of abrasives, sampling method, selection of sample attachment liner, selection of total effective mass of friction load, and abrasive replacement cycle for the determination are consistent with the sample damage method and will not be repeated here. 1. Inspection Interval Design a suitable inspection intervalas an observation point for the wear condition of the sample surface during the sample wear resistance test, and the inspection interval is a certain number of friction times. During the test, check the wear of the sample according to the set inspection interval. When the sample is damaged or reaches the specified number of rubs, the test ends. The measurement of mass loss is divided into two situations: in the first case, the difference Δmi between the mass of the sample before the test and the mass of the test sample after the wear test is measured at each inspection interval; in the second case, the sample When the wear point is reached, measure the difference Δm between the quality of the sample before the test and the quality of the sample after the wear test.
2. Test results
Using the measurement of fabric abrasion resistance - the measurement method of mass loss, the test results include the following data:
①. When each inspection interval is reached, the measured mass loss becomes Δm i;
②. The sample reaches the wear point, i.e. the mass loss Δm when the test reaches the end point;
③. The relationship between the mass loss Δm i and the number of frictions;
④ Wear resistance index Ai (times/g), the calculation formula is: Ai =N/ΔmiN——is the total number of times of friction.

3. Appearance quality change
Measurement of fabric abrasion resistance—Appearance quality change method is suitable for short-life textile fabrics. The selection of abrasives, sampling method and sample confirmation backfill are consistent with the method of measuring the damage of dust samples and will not be repeated here.
①. The total effective mass of the friction load (198±2) g;
②. Abrasive Replacement Cycle: Replace new foam and standard abrasive before each test;
③. Evaluate the appearance of hThe sample Modification requirements:
1) Abrasion resistance test on the surface change determined in the contract, and the number of rubs is used as the measured value of abrasion resistance. Design a suitable inspection interval as an observation point for the change in the appearance of the sample.
2) Abrasion test to the number of rubs specified in the agreement, and evaluate the surface change of the sample by comparing it with the untested sample of the same fabric.

4. Test Results:
Surface changes include discoloration, fuzzing and pilling. If the end point of the wear test is to achieve the surface change specified in the agreement, the inspection agreement will specify the degree of discoloration, pilling and pilling on the surface of the sample, and the test results will use the sample to meet the degrees of discoloration, pilling and pilling specified in the inspeaction match Expressed in the number of times friction. If the end point of the wear test is the number of rubs specified in the agreement, the test result is that after the wear test reaches the specified number of rubs, the sample is compared with the original after the test, and the degree of discoloration, pilling and pilling of the sample after the test has been assessed The level of discoloration of the sample after the test, pilling, lintingBullet grades are responsible for variations in the appearance quality.

More about the Martindale Abrasion Tester: http://www.abrasiontesters.com/productlist/list-5-1. html

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