Recycle packaging: film LDPE plastic - polymer polyethylene (PE)

Polymer polythene (PE) is the most widely used and a widely produced plastic. This is because PE is freeze-resistant down to -40 degrees Celsius, making it suitable for storage in low temperatures. It is resistant to chemicals and heat up to 70 degrees Celsius. It is a so-called thermoplastic, which means that the material can be deformed by heating it. This softens it and allows it to be reused. This is why it is often used in engineering. PE has 2 forms, high density polyethylene HDPE and low density polyethylene LDPE. The latter falls under code 4. LDPE materials, such as LDPE plastic or film, are softer and more easily bendable. In fact, lower density reduces stiffness and hardness, but remains very strong, tough material. The low density is obtained by allowing the polymerisation process to take place under high pressure. This creates molecules with many side branches. The side branches ensure that the degree of crystallisation remains relatively low. LDPE film is allowed to come into contact with foodstuffs and is therefore well suited for use in the food industry. In addition, it is water-repellent, well-insulating, resistant to acids, recyclable and energy-saving. It makes LDPE plastic very suitable as a packaging material.