Shape stability of upper shoe material packages for felt lasting shoes

The object of the research is felt materials and those used for shoe lining: leather, faux fur, baize, fabrics with a membrane coating. The subject of the study is the physical and mechanical properties of felts for the shoe upper and material packages. The main goal of the work is to study the effect of the fibrous composition of the felt and the type of lining on the properties of the shoe upper packages made of materials with a chaotic structure. In the course of the study, the influence of the lining on the shape stability of the shoe upper made of thin felts was evaluated. The analysis of the results was also carried out, which made it possible to draw conclusions about the feasibility of using an alternative technical fine-wool felt in the production of shoes. In the course of the study, the influence of lining materials made from felt of different fibrous composition on the formability, dimensional stability; technological parameters for performing tightening and lasting operations of the shoe upper were determined. This enables to predict the behavior of shoes with felt uppers on the lining, depending on the purpose and service life. The purpose of the research is to ensure that, when developing a technology for manufacturing shoes from materials with an anisotropic chaotic structure, using digitalization, requirements of the parameters of the targeted design of the technological process are followed, considering the purpose of the shoe, the season and the conditions of its use. The results of this study are intended for use in the footwear industry.