
Learn about the global plastics challenge, the recycling processes, and the mechanisms behind them, along with a demonstration of a simple bane scale recycling process.
Identify plastics and their common types; understand the global plastic challenge, its everyday impact, the advantages and challenges of large-scale and small-scale recycling, and the recycling process with a demonstration.
Describe plastics as polymers with limited elasticity, rigid at room temperature, and highlight chemical resistance, lightweight, easy melting, electrical insulation, water-repellency, used in bottles, containers, and tools.
Explore the seven types of plastics, learn how to identify them by recycle numbers, and understand how melting points and properties affect recycling processes.
Trace the collection and sorting steps in plastic recycling, then washing, size reduction, molding, and finishing to convert used plastics into new products.
Explore further sorting methods for plastics, including size-based sieving, infrared scanning, color-based separation, and density-driven air blowing, controlled by a feedback system to enhance separation efficiency.
Size reduction via shredders and polarizers lowers plastic particle size, increasing surface area for even heating and better melting, improving molding quality.
Learn compression molding of shredded recycled plastics, including heating, pressure, cooling, and shrinkage control, to form products, and compare extrusion, injection molding, and thermoforming.
Watch a practical demonstration of turning collected plastic waste into molded objects using cutting, washing, drying, and heat press forming, with emphasis on temperature, cooling, and manual processes.
Explore the stages of plastic recycling, from collection to advanced sorting, and how temperature, pressure, and particle size affect energy use and efficiency. Consider alternatives like biodegradable plastics and incineration.
Explore the global plastic pollution crisis, its oceanic spread from the Pacific garbage patch to waterways, and how recycling and waste management can mitigate ecological and economic impacts.
Explore the plastic cycle toward a circular economy, showing how PET bottles are recycled into new products and how consumer responsibility and take-back policies matter.
Compare large-scale and small-scale recycling, detailing energy and labor considerations, hygiene and dignity, automation benefits, and the plastics that become pipes, pots, clothing fiber, or furniture.
Plastics have become a very important part of modern living. They are used today in almost every part of life. At the same time they currently pose a challenge to the environment and resources.
Plastic recycling is one of the approaches towards addressing these challenges.
To this end, this course covers the topic of plastic recycling with the aim of equipping participants with a fundamental knowledge of how this is done. The course begins with an overview of the global plastic challenge and then goes on to explaining the the processes involved and the mechanisms behind some of these processes. Finally a simple bench scale recycling process is included for the purpose of demonstration.