April 19, 2022
Abrasion resistance is an important indicator of textile quality, which directly affects the durability and use effect of products. It refers to the anti-wear performance of fabrics or other materials when they are repeatedly rubbed. There are many ways to test the wear resistance of textiles, such as flat grinding, curved grinding, hemming, compounding, etc.
Martindale test is one of the widely used flat grinding methods, which can be used to test the abrasion resistance of clothing, home textiles, upholstery textiles, and furniture textiles.
1. Use abrasives. Different standard abrasives are selected according to the characteristics of the samples. Non-coated fabric: plain wool fabric; coated fabric: No.600 water sandpaper. The grinding work surface is separated by felt. After the test, check the surface of the felt. If there is any stain or wear, it should be replaced in time.
2. Sampling method. Machine fabrics should contain more than 3 warp and weft threads. Jacquard fabric or fancy weave shall include a complete characteristic part. When a weave is complete or the pattern is large, each part can be sampled separately.
3. Select the sample holder liner. If the unit area of the sample is greater than 500g/m2, no foam pad is needed. If the unit area of the sample is less than 500g/m2, a foam pad should be added to the sample, and the foam pad should be replaced for each test.
4. Total effective mass selection for friction loads. The total effective mass of the friction force includes the clamp, stainless steel disc, and the mass of the sample weight. According to the parameters provided by Guangdong Test Martindale pilling instrument:
Clamping mass: (200±1)g;
Stainless steel plate quality: (260±1)g;
Weight of sample weight: (395±2) g, (594±2) g.
Three corresponding friction load effective masses are selected based on sample application and fabric properties:
1) (795±7)g: work clothes, upholstery fabrics, bed linen, industrial fabrics;
2) (595±7)g: used for clothing and household textiles (furniture upholstery, bed linen), non-wearable coated fabrics;
3) (198±2)g: Coated fabric for taking.
5. The abrasive replacement times of cashmere standard fabrics are 50,000 times; standard water sandpaper: 6,000 times.
6. It is expected that after the sample reaches the damage, the friction times of the sample is estimated, and an appropriate inspection interval is determined on this basis, and the wear state of the surface of the sample is observed and recorded at this interval.
7. Measurement results The friction number of each sample before crushing was measured, and the friction number before the sample was crushed was used as the number of friction.
The selection of abrasive materials, the sampling method, the selection of the sample holder liner, the selection of the total effective mass of the friction load and the abrasive replacement cycle are consistent with the sample breakage method, and will not be repeated here.
1. During the wear resistance test of the sample, design an appropriate inspection interval as the observation point of the surface wear state of the sample, and observe at a certain friction time interval. During the test, the wear condition is checked according to the set detection time interval, and the test ends when the sample is damaged or reaches the specified number of frictions. The determination of quality loss can be divided into two situations: one is that, within each inspection interval, the quality of the sample before testing and the quality of the sample after the wear test are different Δmi; the sample reaches the wear point, and the sample is inspected. Quality and Abrasion Test The difference between the quality of the test sample and the test sample δm.
2. The test results use the fabric abrasion resistance test method - mass loss test method, and the results include the following data:
①Measured mass loss Δmi when each inspection interval is reached;
② When the specimen reaches the end point, that is, the mass loss δm, that is, the specimen reaches the end point;
③The relationship between mass loss Δmi and friction times;
④. Wear index Ai (times/g), the calculation formula is as follows: Ai=N/ΔmiN-that is, the total number of frictions.
Selection of abrasives. Sampling method. Selection of sample holder pads is the same as for fabric sample breakage and will not be repeated here.
①. Friction load (198±2)g;
②Abrasive replacement cycle: replace new foam and standard abrasives every time;
③ Evaluation of changes in appearance of samples:
1) According to the convention, the wear test of the surface and the number of frictions are used as the measured value of wear resistance. Design an appropriate inspection interval for changing the appearance of the specimen.
2) After the friction test to the agreed amount of friction, use the untested sample and the same fabric to compare and evaluate the surface change. Fourth, the test results: the surface has discoloration, fluff, pilling. If the end point of the friction test is the agreed surface change, the test results shall indicate the surface discoloration, fluff, pilling degree, pilling degree, pilling degree, pilling degree, pilling degree, pilling degree grade of the sample surface. If the end point of the wear test is the specified friction number, the test result is to compare the sample with the original sample after the wear test reaches the specified friction number. According to the color change of the sample, the color fastness, the fluffing degree and the pilling degree are evaluated according to the chromaticity, fluffing degree, fluffing degree, fluffing degree, etc.
