Polyethylene (PE)
Description (definition)
Polyethylene (PE) is a thermoplastic made from the polymerization of ethylene. It is one of the most widely used plastics in the world, known for its versatility, chemical resistance and low density. Polyethylene comes in different forms such as high pressure polyethylene (LDPE) and high density polyethylene (HDPE), each with different mechanical properties. It is widely used in packaging, household goods, pipes and films.
Example
A classic example is the use of polyethylene in plastic bags. LDPE provides flexibility and tear resistance, while HDPE is used for stronger carrier bags.
What are the differences between LDPE and HDPE?
LDPE (low-density polyethylene) is softer, more flexible and has a lower density, which makes it ideal for films and bags. HDPE (high-density polyethylene), on the other hand, is stronger, stiffer and more resistant, which is why it is used for pipes, containers and more robust applications.
Why is polyethylene so widely used?
Polyethylene is cost-effective, versatile and easy to process. It has excellent chemical resistance and is suitable for a wide range of applications, from food packaging to technical components. Its adaptability makes it an indispensable material in numerous industries.
Is polyethylene recyclable?
Yes, polyethylene is recyclable. LDPE and HDPE are often processed into pellets that are used to make new products. Recycled polyethylene is used in products such as bin liners, construction film and irrigation pipes.