Basic Processes of Plastic Production
Plastic production is a complex process that generally involves the following basic steps:
- Raw Material Selection: The selection of polymers to be used for plastic production is crucial. Polymers are obtained from the petrochemical industry and there are many types with different properties.
- Polymerization: Polymers are converted into large molecules through a chemical process called polymerization. This occurs by the addition of repeating units of starting monomers to extend the polymer chains.
- Extrusion: In this stage, molten polymers are extruded through a die in the form of a rod or sheet. Extrusion is a fundamental method for shaping plastics.
- Molding: Plastic is shaped in special molds. These molds allow plastics to take the desired final product form.
- Cooling and Cutting: Shaped plastics are cooled and then cut to the desired dimensions.
Types of Plastics and Their Uses
Plastics come in different types and with different properties. These types have different applications. For example:
- Thermoplastics: These plastics can be reshaped with heat and are widely used in the production of packaging materials, plastic bottles, and consumer products.
- Thermosets: Thermoset plastics cannot be recycled after heat treatment and are hard and durable. Therefore, they are used in applications requiring durability such as electrical components, automotive parts, and the aerospace industry.
- Elastomers: These plastics behave like rubber due to their flexibility and are used in applications requiring flexibility such as seals, tires, and sports equipment.
Plastic Production and Environmental Impacts
Plastic production has significant environmental impacts. The long-term persistence of plastic waste in nature exacerbates environmental pollution problems and leads to plastic gyres in the oceans. Furthermore, the consumption of oil for plastic production increases the use of energy resources and can contribute to climate change. Therefore, sustainable plastic production and recycling measures are important in reducing environmental impacts. In conclusion, plastic production is a complex process that involves the production of different types of plastics. The widespread use of plastics and their environmental impacts necessitate that this sector focus on sustainability and recycling issues.
