Research on the Time Influence of Ultrasonic Impact on the Strength Characteristics of Joining the Parts of Summer Shoes

The article tackles the problem of modern polymer materials and ultrasonic coupling application in footwear industry. During the study of ultrasonic connections of shoe parts it turned out that the low strength of the seams is an important problem. The purpose of the study is to increase the strength characteristics of the ultrasonic connections of summer shoe parts. Ethylene vinyl acetate, medium and low-density polyurethane, as well as belt tape that are used in summer shoes manufacture, were used as research objects. The study was carried out with the use of standard methods and techniques for determining the breaking load, and breaking load in shear. The equipment of the materials and technologies of textile industry department of the Kazan national research technological University was used for the research. The experiments results showed the influence of one of the main parameters of ultrasonic welding. The results of strength tests of the obtained samples allowed us to conclude that, in the area of sound waves impact of on the materials’ welding process used in shoe production, the optimal mode is the action of an ultrasonic wave for 3 seconds in the preliminary fastening. the characteristics of of A set of tests was carried out on the selected samples that made it possible to choose the best material for summer shoes production and the optimal mode of ultrasonic wave operation, which ensures high strength characteristics of the welded joint. The research results were used at the Taezhnik enterprise (Kazan) that specializes in the manufacture of products intended for use in various climatic conditions, including humid environment (clothes, backpacks, summer, demi-season, winter shoes, accessories for sports, outdoor activities and tourism).