| Abstract [eng] |
The aim of this Master’s thesis is to design a production facility for polyethylene terephthalate (PET) film manufacturing based on the co-extrusion process, taking into account modern engineering and environmental solutions that ensure high product quality, efficient raw material utilization, and the integration of recycled materials into the production cycle. The project consists of a literature review, research section, engineering part, and an assessment of occupational health and safety. The proposed PET film production line is based on the A–B–A three-layer co-extrusion principle, employing a combination of various raw materials including virgin PET, mechanically recycled PET, and functional additives (plasticizer AB and colorants). In order to reduce environmental impact, the technology allows the incorporation of up to 60% recycled PET. The system includes solutions for direct melt dehumidification inside the extruder using vacuum pumps, thereby eliminating the need for a separate pellet drying stage. A closed-loop cooling system for the calender is implemented to reduce waste generation during the cooling process. The research section analyses the properties of different raw materials virgin PET, recycled PET, and functional additives and their influence on the mechanical and optical properties of the final film. The effect of the plasticizer AB on the film's coefficient of friction is also evaluated. In the engineering section, the production technology and co-extrusion equipment are selected, along with calculations of equipment parameters and the material balance. The required line throughput, material flows, raw material feeding, and cooling solutions are assessed. Construction solutions for the PET film production facility are selected, and both economic and financial assessments of the project are performed. The environmental part presents physical and atmospheric air pollution calculations, the amount and management of generated waste, and total electricity consumption. Occupational risk assessment is conducted, and fire safety solutions are proposed, including an evacuation plan, signage systems, and fire extinguishing equipment. The graphical section includes five drawings: the layout of the PET film production building with equipment arrangement, a process flow diagram, a side view of the production line within the facility, a rear view of the technological line, and the site layout plan. |
