During the acceptance process of interwoven fabrics, not only the appearance quality but also the intrinsic quality of the interwoven fabric itself should be inspected to ensure that it meets the usage requirements. For example, during the inspection process, its tearing strength is often tested. Currently, the impact pendulum method is usually used for inspection.
In the process of conducting this inspection, the main purpose is to test the strength of the interwoven fabric that is damaged by being hooked by protrusions during use. The specific steps are: first select a fabric sample with a size of 100 mm ¡Á 75 mm, cut a 20 mm incision on the sample, leaving a tear length of 43 mm, and use an appropriate weight to give an instant force to the sample. Tear it and measure its tear strength. And round the result by approximately 0.1N.
At the same time, the tensile breaking strength of the interwoven fabric must be tested. In this test item, a sample with 3 warp and 3 weft dimensions of 5cm ¡Á 30cm is generally selected. The stretching speed and clamping distance of the instrument should be based on the fabric. The stretching speed and clamping distance are determined by elongation: within 8% of the elongation, the clamping distance is 200 mm, and the speed is 20 mm/min; when the elongation is between 8% and 75%, the clamping distance is 200 mm and the speed is 100 mm/min. After setting, conduct the test and record the experimental data.
Then judge based on the experimental data. If the jaw breakage data of the interwoven fabric is less than the small normal value, it should be discarded and resampled. All tests are jaw breakage and a single value should be reported. The jaw breakage should be noted in the report. In addition, seam slippage inspection must be carried out. First, the test fabric must be placed in a standard laboratory environment for 4 hours or more; five 200X100 mm samples should be cut along the warp and weft directions of the fabric. Fold the sample in half, and then cut the sample 12 mm away from the seam line. The allowance of the two layers of fabric should be the same.
Next, slowly increase the load on the surface of the interwoven fabric at a stretching rate of 50 mm per minute until a suitable load value is reached. After decreasing at the original speed, the load on the interwoven fabric sample will be applied. Reduce the pressure to 5N, and immediately measure the width of the trace twice, which is the slip value, and approximate it to one millimeter.
