Dynamic evaluation method of fabric wrinkle recovery performance

The dynamic evaluation method of fabric wrinkle recovery performance includes the following steps: (1), use the fabric wrinkle recovery performance dynamic test system to obtain dynamic angle data; obtain the curve of the wrinkle recovery angle of the sample with time; (2), from step (1) ) Four types of indicators are extracted from the curve to evaluate the wrinkle recovery performance of the sample, reflecting the recovery conditions of the initial stage, rapid elasticity, and slow elasticity of the recovery; the present invention obtains dynamic angle data through the fabric wrinkle recovery performance dynamic test system, and obtains four The class index evaluates the wrinkle recovery performance of the sample. It has the advantages of being accurate and reasonable. Fabric wrinkle recovery performance is an important indicator of fabric quality, which not only determines the appearance of the fabric, but also affects the service life of the fabric. At present, the standard for evaluating the wrinkle recovery performance of fabrics based on the size of the recovery angle is still the static evaluation method of measuring the recovery angle of the wrinkle at a specific time. For example, the standards ISO 2313-1972, AATCC 66-2008 and GB/T 3819-1997 all adopt the recovery process. The angle at 5 min is used as the evaluation index. However, wrinkle recovery is a dynamic process. This evaluation method only reflects the state of the recovery angle of the sample at the specified time, and cannot accurately reflect the wrinkle recovery performance of the sample. For example, the recovery angle of the two fabrics at 5min during the recovery process is similar, but one of the fabrics reaches the recovery angle at 5min in the recovery phase at the beginning of the recovery phase, and the recovery angle of the other fabric continues to increase after 5min in the recovery phase. . Therefore, extracting the dynamic evaluation index of fabric wrinkle recovery can realize accurate evaluation of fabric wrinkle recovery performance. The purpose of the present invention is to provide an accurate and reasonable dynamic evaluation method of fabric wrinkle recovery performance to solve the above-mentioned problems of the prior art. The purpose of the present invention is achieved through the following technical solutions. -A dynamic evaluation method for fabric wrinkle recovery performance, including the following steps: (1) Use the fabric wrinkle recovery performance dynamic test system to obtain dynamic angle data; obtain the wrinkle recovery angle of the sample with time change curve; (2) follow the steps (1) Four types of indicators are extracted from the curve to evaluate the wrinkle recovery performance of the sample, reflecting the recovery of the initial stage, rapid bomb phase, and slow bomb phase of recovery; among them, the four types of indicators include the first type of index and the first type of index. The second type of index, the third type of index and the fourth type of index. The first type of index is the initial recovery rate, and the slope of the linear growth of the angle linear growth at the initial stage of the dynamic angle data is extracted as the initial recovery rate, reflecting the recovery of the initial stage of fabric wrinkle recovery. The second type of indicators is the blast time and the blast recovery angle. The time corresponding to the maximum curvature of the dynamic angle data fitting curve is extracted as the blast time, and the recovery angle corresponding to the blast time is taken as the blast recovery angle, reflecting In the process of fabric wrinkle recovery, the angle changes from abruptly to a gentle turning process. The third category of indicators is the slow spring time and the slow spring recovery angle. The time when the fabric wrinkle recovery angle is basically stable is extracted as the slow spring time, and the recovery angle corresponding to the slow spring time is used as the slow spring recovery angle, reflecting that the fabric wrinkle recovery angle is basically stable The time required and the angle of recovery; reflect the recovery of the fabric wrinkles in the stable stage. The fourth type of index is the recovery rate, and the ratio of the recovery angle at any time to the slow spring recovery angle is extracted as the recovery rate at that time, reflecting the degree of recovery of the fabric at any time. The present invention obtains dynamic angle data through a dynamic testing system for fabric wrinkle recovery performance, and obtains the wrinkle recovery performance of four types of index evaluation samples. It has the advantages of being accurate and reasonable. The specific implementation method uses the fabric wrinkle recovery performance dynamic test system to obtain the dynamic angle data. When the image is collected, the acquisition frame rate of the first 30s is set to 30 frames/s, and the subsequent acquisition speed is set to 1 frame/s. The time-varying curve of the wrinkle recovery angle of one of the collected samples is shown in Figure 1. In Figure 1, the initial stage of the recovery angle curve showed a dramatic increase, and then gradually became smooth and stable. Four types of indicators can be extracted from the curve to evaluate the wrinkle recovery performance of the sample, which reflects the recovery of the initial stage, the rapid stage, and the slow stage of recovery. Take the dynamic recovery angle of the sample in Figure 1 as an example to illustrate the meaning of the dynamic evaluation index.

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