Plastic packaging keeps our goods protected, and is vital for the functioning of daily life. Plastics have many advantages, including cost-effective production and being easy to recycle and reuse. Plastics need to be recycled properly in order to maximise their economic value and to minimise their environmental impact.
The material identification codes are numerical symbols from one to seven that are used to identify the types of plastic.
This coding system is used around the globe by recyclers, waste management companies and plastics manufacturers. All plastic packaging should display these material identification codes.
What is PP?
PP is a hardy, flexible and versatile polymer that is used to manufacture a variety of moulded products, such as dairy tubs for butter and ice cream, plastic furniture, buckets, car bumpers, fibres and woven cloth. PP is the fourth-most commonly recycled polymer in South Africa due to its various applications in daily life.
Polypropylene is a member of a group of plastics known as polyolefins. Structurally, it is similar to polyethylene, the difference being that every other carbon in the backbone chain has a methyl group attached to it. Its durability and flexibility make it the perfect polymer for packaging and woven products. Recycling figures for PP over the past five years have shown steady growth, year-on-year. This can be attributed to the fact that more applications are being developed for PP and that a well-established collection network exists.
Benefits of PP packaging
It is one of the most widely-used plastics in everyday life. PP holds colour well, doesn’t absorb water and is ideal for such robust applications as moulded luggage and storage boxes, woven bags and carpet backings, houseware and tools. Its flexibility also allows plastics manufacturers to make hinged products from PP, such as clip-on lids for plastic containers.
PP is a non-toxic and non-reactive plastic, so it can be used in the food and beverage industry to store goods for consumption. The hollow nature of the fibre gives it excellent water (and sweat) absorption properties in clothing and other woven fabrics. These characteristics and benefits make PP a highly valuable plastic packaging material and one of the most recycled polymers in South Africa.