A Recycling success story about lightweight concrete blocks!

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The biggest success for polystyrene recycling in recent months has undoubtedly come from this innovative and exciting new use and application that mixes an aggregate of post-consumer and post-industrial polystyrene granulated into beads with cement and additives to form insulated, soundproof, fireproof, water-resistant lightweight concrete blocks and screeds.

Step 1:  PS recycling Video

Step 2:  From waste to bricks

Step 3:  Bricks being loaded for delivery to another successful housing project!

For more information visit www.polystyrenesa.co.za

Do you re-use your PP? Research reveals all

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Research has highlighted that a significant proportion of consumers re-use margarine, large yoghurt, and ice-cream tubs made from polypropylene (PP), extending their lifespan and keeping these products out of landfill. Led by the Polyolefin Responsibility Organisation NPC (Polyco), the ‘PP tub re-use research’ aims to guide a higher-level of repurposing for these plastic packaging items by improving their design, for re-use and recyclability.

“Polyco understands the value in research-based credible information. We initiated the research with The Moss Group to determine the extent to which margarine, ice-cream and large yoghurt tubs are re-used after their original use,” says Mandy Naudé, CEO at Polyco. “We wanted to look at this market sector and understand how much of this PP packaging material is placed on the market, how much is recycled, how much is landfilled; then calculate what percentage of these tubs are re-used in households.”

To collect this consumer data, 1550 respondents were engaged telephonically, via online surveys, face to face interviews and social media polls to get feedback on what they do with large yoghurt tubs, margarine tubs, and ice cream tubs. “More than 80% of respondents that participated in the research indicated that they repurposed these plastic tubs, most commonly for food storage, food distribution and household storage” says Naudé.

At least 103 million large yoghurt tubs, 80 million margarine tubs and 31 million ice-cream tubs are produced each year in South Africa, equating to an average of more than 10 000 tonnes of this plastic packaging entering the market. The high repurposing rate results in lower volumes of PP plastic tubs entering landfill or landing up in the natural environment.

Available beach litter data, collected around the country in 2019 and 2020 and provided by a team led by Professor Peter Ryan (UCT) and Dr Maelle Connan (NMU), supports this and indicates that these tubs make up around 3% of the 12 378 bottles and tubs catalogued.
“Supporting the efforts of our PP tub research, we will use these results to guide PP packaging producers and their customers to improve the design of tubs for repurposing,” says Naudé. “Design adjustments such as increasing the strength, improving the lid fit, and having removable labels will lead consumers to use these items as storage containers for longer.”

While the re-use rate of these PP tubs is high, the recycling rate of PP plastic products is approximately 30%. Re-using PP tubs for storage is a temporary solution and eventually these products will need to be disposed of. PP plastic tubs should be designed for circularity, not to be landfilled. Designing products for post-consumer recyclability has now been made a requirement by government.

“This consumer insight research has allowed us to understand what drives the re-use behaviour, which will be very important for brand owners, who under EPR regulations will be required to manage their products at end-of-life to prevent them going to landfill.” New extended-producer responsibility (EPR) regulations are now requiring producers to take responsibility for their products to ensure that consumers can re-use and repurpose products and then recycle them with greater ease.

Driving the market for PP recyclate, designing products for recyclability, creating accessible recycling facilities and increased consumer awareness will increase the recycling rates of these products and lower the volumes of plastic going to landfill.

To find out more about the PP tub research and Polyco, visit their website www.polyco.co.za

What do the numbers on plastic products mean?

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Have you ever seen the symbols on plastic products that look like a recycling logo with a number inside? These are called the material identification codes. They tell plastic manufacturers and recyclers which polymers are present in the plastic product. These symbols do not have anything to do with the number of times the plastic can be recycled, as is commonly believed.

The coding system is used around the world by recyclers to separate and sort plastics so that they can be processed according to the main polymer present.

The numbers on the identification symbol range from one to seven. These numbers are contained within three chasing arrows, forming a triangle around the number. The acronym of the polymer is also displayed underneath the triangle.

1. PET – Polyethylene terephthalate

The symbol with a 1 is used for PET plastic. PET is one of the most common polymers used for food and beverage packaging. It is used to make carbonated drink bottles, water bottles, plastic jars, punnets, trays, strapping tape and more. PET is widely recycled in South Africa and around the world.  For more info visit www.petco.co.za

2. PE-HD (or HDPE) – High-density polyethylene

The identification code with a 2 is used for PE-HD plastic. This is a hard and strong form of polyethylene that is used to manufacture milk bottles, fruit juice bottles, plastic drums, buckets, crates, bins and shampoo bottles. PE-HD is recycled in South Africa. Its strength and durability make it ideal for products that need to withstand wear and tear. For more info on the recycling of PE-HD visit www.polyco.co.za

3. PVC – Polyvinyl chloride

The symbol with a 3 represents PVC – a sturdy and hard plastic polymer. It is used to create irrigation pipes, tamper-proof medicine seals, shrink-wrapping, conduit, toys, plastic gutters and more. PVC is quite difficult to recycle and requires special machinery. Many small-scale recyclers in South Africa cannot process PVC, so plastics manufacturers have started to replace PVC products with PET. For more information visit www.savinyls.co.za

4. PE-LD (or LDPE) – Low-density polyethylene

The identification code with a 4 is used for PE-LD plastics and products such as grocery bags, packets, cling film, bubble wrap and sandwich bags. PE-LD is a flexible polymer that is widely recycled in South Africa. Previously, this type of plastic could jam the sorting machines at recycling facilities, but this is not often the case anymore.  For more info on the recycling of PE-HD visit www.polyco.co.za

5. PP – Polypropylene

The symbol with a 5 depicts PP plastic. This is a temperature-resistant polymer that is used to manufacture ice cream containers, kettles, straws, microwave dishes, garden furniture, bottle caps and takeaway cutlery. PP is also commonly recycled in South Africa.  For more info on the recycling of PP visit www.polyco.co.za

6. PS – Polystyrene

The code with a 6 is used for polystyrene. There are two types of PS – expanded PS and a hardened PS. Expanded PS is the foam-like material used to make packaging fillers and takeaway food containers. The hardened PS is used to manufacture coathangers, bread tags and yoghurt cups. PS is accepted by recycling facilities in South Africa. Visit www.polystyrenesa.co.za for more information

7. Other

The symbol with a 7 is used to denote any other type of plastic polymer. The symbol will display a range of acronyms beneath the triangle, such as ABS, E/VAC, POM, PC, PETG, PA and a combination of these acronyms. Plastics with this code are often made from a mixture of polymers which makes them difficult to recycle, or not recyclable at all.   Many of these plastics are used in plastic timber manufacture where they are combined with wood shavings to produce jungle gyms, walkways which will last for years despite weather conditions, outdoor furniture etc.

In South Africa, materials are only recycled if there is a suitable end-market for the recyclate. These identification codes are used by recyclers to sort the plastics into similar batches for processing.

Download the ALL ABOUT PLASTICS booklet for lots more useful information or visit www.plasticsinfo.co.za

 

Become a part of the circular economy: reuse, recycle, recover!

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A circular economy is a new way of looking at product life cycles and how we consume raw materials. The linear model of consumption that we have used for centuries (take, make, use, dispose) is not sustainable. It requires us to use valuable raw materials and natural resources, which has negative effects on the planet and the climate.

A circular economy stems around the idea that we can feed waste back into the supply chain – essentially reusing and recycling our refuse to create valuable products that can be resold. This reduce, reuse, recycle model of consumption is far more sustainable and better suited to products like plastic and recyclable materials.

As society becomes more aware of its impact on the planet, people are finding more innovative ways to reuse their waste and retain its value, rather than letting it sit in a landfill. Plastics are a prime example of valuable recyclable materials that often get dumped in waste management facilities.

We need to embrace a circular economy

A circular economy will only work if there is input from all sectors of society. The government needs to work alongside businesses, communities and individuals. Every South African will need to embrace recycling and actively participate in sustainable waste disposal practices in order for a circular economy to thrive.

Public education and raising awareness of the importance of recycling is just one step to improving recycling rates. The plastics industry is also playing its part by working to improve the recyclability of its products.

The future of plastics is more sustainable

The industry is researching alternative ways to make plastics, such as creating products from plant-based polymers. This will allow the plastics to break down and decompose if left in the environment. The future of the plastics industry revolves around sustainability and the circularity of the products’ life cycles.

A factor that influences the recyclability of plastic is its colour. Black plastic can be difficult to recycle because the infrared scanning sensors at recycling facilities cannot detect the black pigment. Luckily, many of South Africa’s recycling centres use manual labour to sort plastic waste so the black plastic is not a major problem.

Recycling facilities can be upgraded

Although plastics are perfectly suited to a circular economy, the recycling infrastructure in South Africa will need to be upgraded if this system is to become a reality. Our waste management facilities will play a vital role in turning plastic waste into high-quality, reusable products that can be fed back into the supply chain.

The national government can support these facilities and invest in the upgrades in order to establish a circular economy in South Africa. This will not only help recyclers to increase their handling capacities but will also allow them to improve the quality of their output products. Private companies can also help to provide funding for the support of our recycling network.

A circular economy is not a farfetched idea, nor is it unattainable. By embracing recycling, improving the recyclability of plastic products and investing in waste management facilities, South Africa could benefit from a sustainable economy. By reusing plastic waste and turning it into saleable products, the country could benefit from a cleaner environment and retain the value of plastic at the same time.

 

All About Plastics: Polystyrene facts

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What is PS?

Polystyrene is a lightweight polymer that comes in two types; high-impact polystyrene (HIPS) and expandable polystyrene (PS-E or EPS). It was first sold commercially in the 1930s as an economic plastic to enhance food hygiene and extend product shelf-lives. PS is commonly used in the food and beverage industry as takeaway containers, vegetable punnets, disposable cutlery and plastic cups. PS is also recycled into lightweight cement blocks for the building industry.

Its lightweight nature makes PS an energy-efficient plastic to produce with a low carbon footprint. This plastic is in high demand by recyclers as it is used to manufacture seedling trays, combs, rulers, picture frames and clothing hangers. It is the sixth-most processed polymer by South African recycling facilities. Due to the well-established waste collection network and the fact that plastic food and drink containers form a large portion of our waste, 5572 tonnes of lightweight polystyrene packaging were recycled in 2018 alone.

Benefits of PS packaging

PS has numerous unique characteristics that make it a valuable packaging material. The two types of polystyrene have different applications. HIPS is a transparent and semi-flexible plastic that is used to make fruit and vegetable containers (like grape punnets) as well as CD cases. PS-E is a foam-like polymer that is used to make vending cups, meat trays (like boerewors punnets) and cooler boxes.

PS is heat-resistant and acts as a good insulator – hence its widespread use in the food and beverage sectors. It is fairly easy to recycle and can even improve the aeration in landfills if it is not sent to a recycling facility. The furniture and domestic housewares markets are the two largest consumers of PS recyclate.

PS is non-toxic and non-reactive, so it can be used in food and beverage contact applications without affecting the consumer. These characteristics and benefits make PS a highly-valuable plastic packaging material in South Africa.

What is Polypropylene?

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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.

All About Plastics: What is PE-LD?

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Plastics are highly valuable materials that make modern life possible. Plastic packaging has many advantages, including affordable production and ease of recycling and reuse. Plastics need to be recycled properly in order to maximise their economic value and to minimise their environmental impact.

Find out more about the various polymers, their benefits and their recyclability properties, including what products can be made from recycled plastic. 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. It enables them to separate and sort plastics so that they can be processed according to the main polymer present. All plastic packaging should display these material identification codes. The fourth polymer used for plastic packaging is low-density polyethylene (PE-LD or LDPE).

What is PE-LD?

PE-LD is a flexible and low-weight form of polyethylene that is used to manufacture a variety of plastic bags, wraps, toys, phone cables and storage tanks. PE-LD is the most commonly recycled polymer in South Africa due to its multiple applications for daily life. Just under 120 000 tonnes of PE-LD were processed and recycled in South African facilities during the 2018 financial year.

Its flexibility and durability make it ideal for packaging and bags that need to be lightweight but reusable. This plastic is in high demand by recyclers as it is used to manufacture bin liners, construction film, furniture covers and many types of plastic bags. The substantial growth in the recycling of PE-LD can be attributed to the fact that barriers to entry are fairly low and a well-established collection network exists.

Benefits of PE-LD packaging

PE-LD has numerous unique characteristics that make it a valuable packaging material. It differs from normal polyethylene because it has a lower molecular weight which makes it lighter and more flexible – less dense than conventional polyethylene. All polyethylene polymers have a whitish colour and are semi-crystalline, but PE-LD is more flexible.

It is ideal for manufacturing plastics bags, sheets, films, tubes, sachets and cables. PE-LD recycling has a 100% conversion rate when processing plastic bags into new plastic bags – there is no wastage at all. The flexible packaging market is also the largest consumer of plastic recyclate – 19% of the South African market for recycled plastic is for flexible packaging. This means that PE-LD is a highly sought after material for recyclers and packaging manufacturers.

PE-LD is non-toxic and non-reactive, so it can be used in the food and beverage industry to shrink-wrap and store produce for consumption. These characteristics and benefits make PE-LD one of the most valuable plastic packaging materials in the world and the number one most recycled polymer in South Africa.