Разработка многослойных упаковочных материалов с использованием полиолефиновых отходов для хранения пищевой продукции

Abstract

Every year the range of packaging for bulk products and pasta, consisting of multi-layer polymer films, increases, increasing the shelf life of the finished product. Multi-layer polymer packaging is difficult to dispose of, because the complexity lies in the process of sorting, identification and separation, therefore, most often polymeric waste goes to landfills and landfills. All this leads to an environmental and economic problem in the country. Currently, various techniques are used to process such mixed polymer waste for the production of secondary raw materials, which are returned to the production cycle. One of such methods is the modification of polymer blends by the introduction of reactive additives. The article is devoted to the study of the effect of ethylene-propylene copolymer on the properties of polyolefin compositions for creating multilayer packaging materials. The studies were conducted in the laboratory of composite materials of the Moscow State University of Food Production. The objects of study were selected polymers such as polyethylene, polypropylene and a copolymer of ethylene and propylene (CEP), as a link between the polymers. Images were obtained in a laboratory setup of an MFMT type with a receiver. This installation allows you to process the polymer compositions without melt mixing. In this paper, we studied the process of modifying polymer mixtures based on polyethylene and polypropylene by CEP in a laboratory setup; complex studies of the rheological and physicomechanical properties of polymer compositions were carried out. On the basis of the conducted research, it was established that the introduction of a CEP in a polyolefin composition leads to stabilization of rheological and physicomechanical properties, and a technology is proposed for producing packaging multilayer materials using packaging waste in the middle layer for contact with food.