How does the Martindale Abrasion Tester measure the abrasion resistance of fabrics?

The Martindale Abrasion Tester can test the abrasion resistance and pilling performance of various plants. Under a certain pressure, the sample and the specified abrasive are subjected to continuous reversing friction, and the degree of wear and pilling is evaluated by comparison with the standard parameters. Not only the textile industry needs to use the Martindale Abrasion Tester in the leather testing industry. Here, Standard Group (Hong Kong) Co., Ltd.

1. Determination of sample damage

This method is suitable for all textile materials, but not for fabrics with a shorter lifespan.

(1) The choice of the abrasive. Choose different standard abrasives according to the characteristics of the sample. Uncoated fabric: woven plain wool fabric Coated fabric: No. 600 water sandpaper. The abrasive material and the grinding table are separated by wool felt. After the test, check the surface of the felt. If there are stainsand whether wear and tear, it should be replaced in time.

(2) Sampling method. At least 3 pieces, Xiang L 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) Specimen fixture liner selection. Measure the mass per unit area of ​​the sample, the area unit of the sample is ≧500 g/m2, no foam plastic liner is required, the unit area of ​​the sample is <500 g/m2, and the foam plastic liner is installed in the sample fixture and replaced for each test. Foam filling.

(4) Selection of total effective mass friction load. The total effective mass of the frictional load 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.

There are three types of total effective mass according to the application of the sample and the properties of the substance: 1) ( 795±7)g: suitable for work clothes, upholstery fabrics, bed linen products, industrial fabrics; 2) (595±7) g: suitable for clothing and home textiles (furniture upholstery, bed linen products), non-clothing coated fabrics; 3) (198±7) g 2) g: Coated fabric suitable for wearing.

(5) Abrasive Replacement Cycle

Wool Standard Cloth: 50,000 times; standard water sandpaper: 6000 times.

(6) Inspection Interval

Estimate the number of times friction occurs when the sample is damaged and based on this, design a suitable inspection interval as a testing process for the wear resistance of the sample In the observation point of the wearcondition of the sample surface, the inspection interval is a certain number of friction times.

(7) Show determination results

Measure the total friction when each sample is damagedThe number of frictions, the number of accumulated frictions before the sample is damaged, is taken as the number of abrasions.

Second, determining mass loss

Applicable to all textiles fabrics, but not for short-life fabrics. The selection of abrasive, 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 should be consistent with the sample damage measurement method and will not be repeated here.

(1) Inspection Interval

Design a suitable inspection interval as an observation point for the wear condition of the sample surface during the wearresistance test of the sample, and the inspection interval is a certain number of rubs. 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 cases: 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 In case the sample reaches the wear point, 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 method of abrasion resistance of fabric - the measurement of mass loss - the test results include the following data: 1) When each inspection interval is reached , the measured mass loss Δmi of the sample; 2) the sample ranget the wear point, i.e. the mass loss Δmi when the test reaches the end point) the mass loss A. 4) The wear resistance index Ai (times/g), the formula for the calculation is:

Ai=N/ Δmi

N is the total number of frictions.

Third, change of appearance quality

Determination of wear resistance of fabric - Method of change of external quality Applicable to textiles with a short life. 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 frictional load (198±2) g;

(2) Abrasive replacement cycle: replace new styrofoam and standard abrasive for each test;< /p>< p> p>

(3) Requirements for evaluating the appearance change of the sample: 1) From the wear test tot the surface change specified in the agreement, the number of frictions shall be used as the measured value of the wear resistance. Design a suitable inspection interval as an observation point for the change in the appearance of the sample. 2) Martindale Abrasion Testing Machine at the number of rubbing 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, pilling and pilling. If the end point of the abrasion test is to achieve the surface change specified in the agreement, the inspection agreement will specify the degree of surface discoloration, pilling and pilling of the sample, and the test results will be usedIt is expressed by the number of rubs when the sample reaches the level of discoloration, pilling and pilling that is specispecified in the inspection agreement. 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 discoloration level, pilling and pilling level of the sample after the test will explain the change in the appearance quality.

The above systematically introduces the method and standard system for determining the abrasion resistance of Martindale fabrics, pointing out that the relationship between European standards, German standards, American Society for Materials standards and Chinese standards and international standards ISO is equivalent to adopting or changing the assumed relationship. There are three methods for determining the abrasion resistance of the fabric according to the Martindale method: the sample damage method, the mass loss method, and the appearance quality change method. Of the three methods, the test method of sample damage is often used. The error of this method is small, the test results are self-observing and clear, and the wear resistance of different fabrics is easy to compare. It is generally used in clothing products and decorative fabrics. The expression form of the test results of the quality loss measurement method and the appearance quality change method is relatively complicated, but it can reflect the wear resistance of the sample in different stages of friction. Based on my country\'s national standard GB/T 21196.2-4-2007, the main contents of the three methods of measuring the abrasion resistance of woven fabrics in the Martindale Abrasion Test are summarized, in the hope of helping textile quality inspectors to correctly understand and thento fit. The Martindale method is used to test the abrasion resistance of fabrics.

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