Commonly used method for testing wear resistance of fabrics with the martindale abrasion tester

The martindale wear tester can test the wear resistance and pilling performance of various plants.At a certain pressure, the sample and the specified abrasive to continue to reverse friction, and the standard parameters and wear and pilling degree evaluation.Not only the textile industry in the leather testing industry also need to use the martindale wear-resistant instrument, here for you to briefly summarize the leather, textiles wear resistance testing methods overview.

Measurement of mass loss

Suitable for all textile fabrics, but not for fabrics with short wear life.The determination of abrasive selection, sampling method, sample fixture liner selection, total effective mass selection of friction load and abrasive replacement cycle are consistent with the test sample damage determination method, which is not repeated here.

(1) inspection interval

An appropriate inspection interval is designed as the observation point of the wear condition of the sample surface during the wear resistance test, and the inspection interval is a certain number of times of friction.During the test, according to the set inspection interval, check the wear condition of the sample. When the sample is damaged or reaches the specified friction number, the test is finished.To the measurement of quality loss is divided into two cases: a situation in which, in each inspection interval, the quality of the test sample before and after wear test experiment of the difference of the quality of the sample Δ mi;Two kinds of circumstances, to wear point, the quality of the test sample before and after wear test test of the difference of the quality of the sample Δ m.

(2) test results

The test results include the following data:

1) arrived at each inspection interval, the determination of the mass loss of Δ mi;

2) sample to wear point, also is a test of the quality loss Δ mi when reaches the endpoint;

3) wear resistance index Ai(times /g), the calculation formula is as follows:

Ai = N/Δ mi;

N one is the total number of frictions.

Change of appearance quality

Determination of wear resistance of fabrics -- change of appearance quality method is suitable for textile fabrics with short wear life.The selection of abrasive, sampling method and sample fixture gasket is consistent with the method of fabric sample damage determination, which is not repeated here.

(1) total effective mass of friction load (198±2)g;

(2) abrasive replacement cycle: replace new foam plastics and standard abrasives in each test;

(3) requirements for the appearance change of the evaluation sample:

1) the number of times of friction shall be taken as the measured value of wear resistance from the wear test to the surface change specified in the agreement.Appropriate inspection intervals are designed as observation points for changes in the appearance of samples.

2) the friction times from the martindale abrasion tester to the agreed number are compared with the untested samples of the same fabric to evaluate the surface changes of the sample.

(4) test results: surface changes include discoloration, fuzz and pilling.If the end point of the wear-resisting test is to reach the surface change specified in the agreement, the inspection agreement shall specify the degree of surface discoloration, fluffing and pilling of the sample. The test result shall be expressed by the number of times of friction when the sample reaches the degree of surface discoloration, fluffing and pilling specified in the inspection agreement.If the end point of the abrasion test is the number of times of friction specified in the agreement, the test result is that after the abrasion test reaches the number of times of friction specified in the agreement, the test sample is compared with the original sample, the degree of discoloration, pilling and pilling of the test sample is rated, and the change of appearance quality is explained by the degree of discoloration, pilling and pilling of the test sample.

Sample damage measurement

The method is applicable to all textile fabrics, but not to fabrics with short wear life.

(1) selection of abrasive.According to the characteristics of the sample to choose different standard abrasive.Non-coated fabric: woven plain wool fabric;Coated fabric: No.600 water sandpaper.The abrasive and the grinding table shall be separated by wool felt. After the test, check the surface of the wool felt. If there is any stain or abrasion, replace it in time.

(2) sampling method.At least 3 pieces of xiang L fabric should contain different warp and weft yarns.Jacquard fabric or fancy weave shall include the characteristic parts of a complete weave. When a complete weave or pattern is large, each part may be sampled separately.

(3) selection of sample fixture gasket.Test the unit area mass of the sample, the unit area of the sample is 500g/m2, no foam liner is needed, unit area of the sample: 500g/m2, add foam liner in the fixture of the sample, and replace the foam liner in each test.

(4) selection of total effective mass of friction load.The total effective mass of friction load includes gripper, stainless steel disc and sample weight.According to the technical parameters provided by martindale abrasion resistance and pilling tester, the mass of gripper is 200±1)g;Stainless steel disc mass 260±1)g;The sample weight is 395±2)g, (594±2)g.

According to the purpose of the sample, there are three kinds of total effective mass of the corresponding friction load selected according to the characteristics of the fabric:

1) (795±7)g: applicable to work clothes, furniture decorative fabrics, bed linens, industrial fabrics;

2) (595±7)g: coated fabrics suitable for use and household textiles (furniture upholstered fabrics, bed linens), not for use;

3) (198±2)g: suitable for coated fabrics.

(5) abrasive replacement cycle

Wool standard fabric: 50000 times;Standard water sandpaper: 6000 times.

(6) inspection interval

On the basis of the estimation of the number of times of friction when the samples reach the damage, an appropriate inspection interval is designed as the observation point of the wear state of the surface of the samples during the wear resistance test. The inspection interval is a certain number of friction times.

(7) the determination result is expressed

The total number of times of friction when each sample is damaged is measured and the number of times of friction accumulated before the sample is damaged is taken as the number of times of wear resistance.

It is pointed out that the relationship between European standard, German standard, American material association standard and Chinese standard and international standard ISO is the same as that of adoption or modification.There are three kinds of methods for the determination of wear resistance of martindale fabric: sample damage, mass loss and appearance quality.Among the three methods, sample damage measurement method is commonly used. This method has small error, self-explanatory test results, and easy to compare the wear resistance of different fabrics. It is widely used in clothing products and decorative fabrics.The expression of the result of mass loss measurement and appearance quality change method is more complicated, but it can reflect the wear resistance of the sample in different friction stages.Based on the national standard GB/T 21196.2 ~ 4-2007, the main contents of the three methods for measuring the wear resistance of fabric in the martindale wear tester are summarized, hoping to help the textile quality inspectors correctly understand and apply the martindale method for testing the wear resistance of fabric.

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