Avimetal has developed equipment and technology to recycle contaminated plastic waste that is classified as waste. There are three common ways to recycle plastics: physical, thermodynamic, and chemical. Physical or chemical regeneration is the problem of sorting different types of plastics, which is ineffective or uneconomical. In addition, thermodynamic technology is a process of extracting biodiesel, which carbonizes waste plastics from a vacuum furnace, generating a lot of thermal energy and carbon dioxide, so licensing restrictions and economic feasibility are not guaranteed. For this reason, most countries are landfilling waste plastic rather than regenerating it.
Avimetal has succussed in injection molding a variety of mixed plastics, including PVC and nylon, contaminated with heavy metals. Our process allowed us to finally dispose of the waste in an environmentally friendly manner without the need to sort or clean the contaminated plastic.
Mixed plastics that are generally difficult to classify are approximately 80-90% PVC/XLPE, 5-7% nylon, the rest are heavy metals, paper, dust/impurities. Our processes are highly energy-efficient, do not generate new waste, and are highly flexible due to our potential to create products ranging from thin-walled structures to hard-sectional parts.
We are currently experimenting with a process of mixing FRP, graphene, glass, carbon, red mud, and clay into mixed plastics to develop low-cost fillers. Our process is not only for building materials, but also for 3D printers, which can print large structures such as ships, and make large parts with hundreds of keys or more.
One idea for making building blocks from waste plastics is to use a process called “plastic extrusion”. Here are the basic steps:
Collect and sort plastic waste: Collect plastic waste.
Shred the plastic: Use a shredder to cut the plastic into small pieces. This increases the surface area of the plastic, making it easier to melt.
- Add clay, silica or slag into the shredded plastics, and mix them by steam heating.
Melt the plastic/clay mixture: Heat the shredded plastic to its melting point. This can be done in a special machine called an extruder, which uses heat and pressure to melt and shape the plastic mixture.
Extrude the plastic mixture: Once the plastic mixture is melted, it can be forced through a die (a metal plate with a specific shape) to form the building blocks. The extruded plastic mixture is then cut into the desired size and length.
Cool and finish the building blocks: After the plastic mixture has been extruded into the desired shape, it needs to be cooled quickly to maintain its shape. Once it has cooled, any excess plastic mixture can be trimmed and the blocks can be finished to ensure they are smooth and ready for use.
Building blocks made from waste plastics can be used for a variety of applications, including construction of low-cost housing, walls, and fences. This process helps reduce plastic waste and provides a sustainable alternative to traditional building materials.