Not all plastics are the same: each type has unique properties and uses, which must also be considered for recycling. In this article, we’ll explore the seven main types of plastic according to the RIC system (Resin Identification Code). Each type is identified by a triangle symbol with a specific number inside. Here they are in order.

 PET (Polyethylene Terephthalate)

Polyethylene Terephthalate, commonly known as PET, is the most widely used plastic globally.

It is primarily used in the production of beverage bottles, food containers, and other packaging materials due to its good barrier properties against oxygen and moisture. PET is lightweight, transparent, making it a popular choice for water bottles and increasingly used for cosmetic and personal care product containers. It is the most recycled plastic material worldwide.

 HDPE (High-Density Polyethylene)

High-density polyethylene (HDPE) is known for its high strength-to-density ratio, thanks to its molecular structure. It is one of the most commonly used plastics for manufacturing containers designed to hold personal care and cleaning products.

 PVC (Polyvinyl Chloride)

Polyvinyl chloride, or PVC, is one of the most versatile plastics.

Rigid PVC is commonly used in construction for items such as window frames, while in packaging, it is used for medical products and applications requiring high oxygen barrier properties, such as blood bags or containers for oxidation-sensitive products like certain hair dyes.

Flexible PVC is used in plumbing systems, electrical cable insulation, and even clothing.

 LDPE (Low-Density Polyethylene)

LDPE is known for its flexibility, transparency, excellent electrical insulation properties, and moisture resistance. The moldability of LDPE makes it suitable for products such as plastic bags, shrink wrap, and squeeze bottles.

There is also LLDPE, or linear low-density polyethylene, which combines the characteristics of both HDPE and LDPE; it offers better flexibility and high tensile strength.

In the packaging industry, LDPE and LLDPE are widely used due to their versatility and flexibility.

 PP (Polypropylene)

Polypropylene (PP), one of the most produced plastics in the world, is a durable and heat-resistant plastic commonly used in car parts, food containers, and fabrics.

The high melting point of PP makes it ideal for containers that need to hold hot liquids or be used in the microwave.

 PS (Polystyrene)

Polystyrene (PS), better known as Styrofoam, is widely used in packaging materials, disposable cutlery, and insulation. PS can be solid or expanded, with the latter being the lightweight material we all recognize.

 Other plastics

The category of "Other plastics" includes a wide range of polymers that don’t fit into the first seven categories: this group includes polycarbonate (PC), which is used in products like sunglasses and CDs.

Plastic has become an integral part of our daily lives - cars, houses, packaging, clothing, electronic devices, toys - almost everything is made, at least in part, of plastic.

This is why everyone's contribution is needed to prevent it from being dispersed into the environment.