Substantiation of the measurement parameters of the tangential resistance coefficient of woven fabrics

To date, there are no objective methods for evaluating the feel of cloth, with which it would be possible to quantify the effect after softening. However, most researchers argue that for an objective assessment of the feel of cloth after the textile softening finishing, it is possible to use the index of the tangential resistance coefficient. Methods for determining the coefficient of tangential resistance are varied. In this paper, we considered the method of horizontal and inclined plane. The purpose of this work is to determine the rational parameters for measuring the tangential resistance coefficient by the horizontal plane method, namely, the choice of the optimal number of tests, the study of the influence of the contact area, the speed of the carrier plane on the tangential resistance coefficient of textile fabrics, and also to compare two methods for determining the tangential resistance coefficient using the horizontal plane method on the FPT-F1 device and by the inclined plane method. The study found that for the reliability of the results it is necessary to measure the tangential resistance coefficient at least 13 times, taking into account the last three values. The dependence of the coefficient of tangential resistance on the contact area and the speed of movement of the carrier plane is established. It is concluded that for woven fabrics it is recommended to use a block with a size of 65x120 mm. It has been experimentally established that in order to increase the sensitivity of the horizontal plane method when determining the coefficient of tangential resistance of woven fabrics, it is recommended to set the speed to 150-200 mm/min. The results of comparing the two methods showed that the tangential resistance coefficient is not a constant value and depends on the method used.