To recycle plastic you’ve got to know what the numbers mean.
This a great resource to determine what plastics to recycle. In order to understand why the numbers make a difference you have to remember that plastic is a man made material. The number markings on plastics is crucial in sorting for processing.
Stage 1 : Sorting the plastic
To have success with this stage, it is very important for the consumer to learn the correct disposal procedures for their trash, and do all pre-sorting necessary. For example, you can take out the corks of bottles, caps or lids, making it easier for machinery to sort waste.
Plastic waste needs to be collected by the recycling company, once the plastic arrives at the recycling plant the first stage begins to sort the plastic into the specific types. Plastic recycling is more complex than metal or glass recycling because of the many different types of plastic that exists. In addition, mixed plastic cannot be used in manufacturing without delivering a poor quality product, therefore reasons why plastic recycling companies need to be thorough with its sorting methods, sorting plastic waste into different categories before going to the next stage in the recycling process.
Stage 2: Washing Waste Plastic
Once plastic waste has been identified and separated into one of its many forms the cleaning process can begin, this usually starts with washing to remove paper labels, adhesives and other impurities, all the labels on your plastic containers, bottles and even your wheelie bin need to be completely removed as these will lower the quality of the finished recycled plastic.
Stage 3: Shredding the Plastic
The shredding stage is when plastic waste is taken and loaded onto conveyor belts or directly into huge hoppers that funnel the clean scrap towards rotating metal teeth that rip the plastic into small pellets which are bagged up afterwards ready for testing.
Stage 4: Identify and classify the Plastic.
Once the shredded plastic has been bagged it is then chemically tested and labelled as to its exact specification, this rGrade of plastic can be used to add to a mix of virgin plastic in the manufacturing run, alternatively the rGrade plastic can be further recycled.
Stage 5: Extruding (melting)
This is the final stage in the recycling process of plastic. This process involves melting clean, shredded, homogeneous plastic and extruding into the form of pellets which then go onto manufacturing the next lot of plastic products.