Abstract.Research results shows that RF-plasma treatment increases the adhesion of the coating film to the leather uppers and resistance to abrasion and repeated bending of uppers, which define the ability of material to preserve its consumer properties and characterize longer safety of special purpose footwear form during its wearing.
IntroductionTextile industry is a significant multiple-discipline sector of the economics, which influences on the stable and balanced social and economic development of the country and provides an independent and intellectual levels of the society. From the branch work effectiveness point and taking into account of situation around the external economic rate huge and massive tasks connected to the renew of high-quality production and continuous process of labor protection improvement need to be solved by the domestic producers [1,2]. High productivity of labour is not only the result of interaction of human, nature and technique but also right organized labor activity.Physical activity and capacity for work of the specialist is provided by the rationally chosen equipment. Enterprises provide their workers with means of individual protection, which include garment and footwear of special purpose. Means of individual protection protect from adverse impact during the operation of work. The main aim of use of means of individual protection is prevention of industrial injuries.Garment and footwear of special purpose are operated in severer industrial conditions than domestic. Because of this the construction and technology of garment and footwear of special purpose have specific features. The level of deterioration of uppers materials are determined by physical activity, which in turn is divided into biomechanical determined by anatomical and physiological features of a man and sanitary and hygienic properties connected to the whole or part hygroscopicity of material [3]. Any means of individual protection, regardless the end use, must be ergonomic, harmless, safe, ensure the unimpeded normal functioning of the human body during the planned period of operation.Materials used at special purpose footwear production differs a lot from the deterioration of model footwear by character and level of exploitation deterioration and also service life. Character, terms of advent and the intensity of defects development of uppers, lining and bottom of footwear are
Abstract. Capillary-porous materials, which include natural macromolecular tanning material, are exposed to a number of factors during the treatment by a nonequilibrium plasma. Plasma particles exchange the charge and energy with the atoms of the material during the interaction of the plasma with the surface. The results of treatment are desorption of atoms and molecules from the body surface, sputtering and evaporation of material's particles, changes of the structure and phase state. In real terms during the modification of solids by nonequilibrium low-temperature plasma thermal effect influences the process. The energy supplied from the discharge during the process with low pressure, which is converted into heat, is significantly less than during the atmospheric pressure, but the thermal stability of high-molecular compounds used in the manufacture of materials and products of the tanning industry, is very limited and depends on the duration of the effect of temperature . Even short heating of hydrophilic polymers (proteins) (100-180 0 C) causes a change in their properties. It decreases the collagen ability to absorb water vapor, to swell in water, acids, alkalis, and thus decreases their durability. Prolonged heating leads to a deterioration of the physical and mechanical properties. Higher heating temperatures it leads to the polymer degradation. The natural leather temperature during plasma exposure does not rise to a temperature of collagen degradation and does not result in changes of physical phase of the dermis. However, the thermal plasma exposure must be considered, since the high temperatures influence on physical and mechanical properties.
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