Targeting
According to different standards, such as 24 hours (GB/T 4 80 2 .2 a 19 97) and 16 hours (EN ISO 12947), it is required to place the sample in the standard atmosphere and keep it flat for a certain period of time without stretching- 4:1998).
Find the right abrasive
Different characteristics of the specimen require different standard grinding materials. Uncoated fabrics should be rubbed with woven plain woolen fabric, and uncoated fabrics should be rubbed with No. 600 water sandpaper. The grinding material and the grinding table are separated by wool felt. After the test, check the felt surface for stains or wear. If there is, it should be replaced in time.
sampling method
At least 3 pieces of woven fabric shall contain various warp and weft yarns. Jacquard or fancy textures need to include partial stitch repeats. When the stitches are repeated or the pattern size is large, each part of it can be sampled separately.
Selection of grips and spacers for the specimen
When testing the mass per unit area of the test piece, if the unit area of the test piece should be equal to or greater than 500g/m2, no foam pad is required. If the unit area of the sample is less than 500g/m2, an additional foam pad should be installed in the sample holder and replaced at each test.
Select the total effective mass for the friction load
The total effective mass of the friction load is the sum of the grips, stainless steel disc and specimen weight. For example, some test instrument companies offer grips with a mass of 199 or 201 grams, stainless steel discs with a mass of 259 or 261 grams, and sample weights of 393, 397, 592, or 596 grams. Depending on the properties of the fabric and the usage of the sample, the corresponding total effective friction load mass can be calculated in three ways.
1) 788 or 802 grams: workwear, upholstery, bedding and technical fabrics
2) 588 or 602 grams: Coated fabrics for non-apparel, textiles for apparel and home textiles such as upholstery and bedding
3) 196 or 200 grams: garment coated fabric
Remove the load and load shaft from the Tester
Remove the top plate and test fixture
Loosen the retaining ring on the test fixture
Then remove the sample pressure plate and put the sample into the base of the test fixture. The specimens in each grip shall be subjected to the same tensile strength.
Place felt and heavier abrasive materials on the grinding table
Then place them on the chuck and tighten the nut so that the grinding material can be fixed on the grinding table.
Increase the pressure by placing the grinding head on the abrasive material.
Place the test fixture sample face down on the base fixture and align the circular groove of the test fixture with the load axis. As a result, the load shaft is inserted into the circular groove of the test fixture.
Place the test fixture sample face down on the base fixture
Align the circular groove of the test fixture with the load axis. As a result, the load shaft is inserted into the circular groove of the test fixture.
Set the number of tests according to the standard
And based on an estimate of the number of rubs required for textile wear, establish an appropriate inspection interval prior to the experiment. Then turn on the switch and test it. Use this interval as an index to measure the wear state of the wear surface of the sample during the wear test.
show test results
The total number of frictions when each sample was worn was measured, and the cumulative number of frictions before the sample was damaged was taken as the number of abrasions.
