Polypropylene Recycling

The thermoplastic polypropylene is among the most popular polymers used in packaging materials worldwide because of it’s resistance to different chemical solvents, acids and bases. Despite this, with approximately 99% currently heading for landfill, polypropylene is one of the least recycled plastics.

Polypropylene is considered a potentially sustainable resource due to the relative ease of recycling polypropylene and it’s resistance to thermal degradation. These characteristics, as well as the huge quantities of PP that is currently discarded, offer a huge opportunity for the recycling industry.

In the past, recycling polypropylene was considered uneconomically viable. However, with changes in technology, government policy and global oil prices, things have changed. To see more about how people are making a huge financial return by reprocessing PP in a Rotajet recycling line, please see the process flow below.

lead acid battery recycling plant

The Polypropylene Recycling Process

large storage vessel for plastic granulate
Feed Hopper
PW75 plastic prewasher for removing heavy contamination
Sink float tank full system
Sink-float tank
save money with plastic granular
mechanical horizontal plastic dryer side view
Double bagging station with zigzag separator
Bagging off

To discuss how a Rotajet plastic film recycling line can be integrated into your facility please contact our technical team who can talk through your individual circumstance so we can provide tailored advice.

Polypropylene is loaded in batches into a Rotajet feed hopper, which is fitted with a inverter driven screw to provide consistent feed to the plant. This multi-screw system avoids bridging and blockages remotely by adjusting the direction and speed of the screw augers; thus reducing machine downtime and improving your overall throughput rate.

The material is fed from the hopper into the Rotajet pre-washer to remove the majority of the contamination. This efficient incline plastic washer is fitted with inline filtration and automatic chemical dosing.

A Rotajet sink-float is then used to separate the polypropylene from contaminants such as ABS, PVC, PET, glass, metals and others. The sinking fraction is screwed to bagging off for disposal whilst the floating fraction is transferred into the next stage.

This powerful wet granulator ensures an even particle size so your final product is suitable for resale into the market. Durable and efficient, our granulators are completely welded and have a heavy steel construction; making them capable of withstanding the most demanding requirements present in the industry.

This horizontal mechanical dryer is the most efficient way of dewatering granulated and shredded plastics. Our mechanical dryers can reduce moisture levels for rigid plastics down to around 1%. The machine is fitted with a rotor which rotates at high speed (approx. 1450rpm). To ensure our dryers are simple to maintain, the rotor is fitted with easy-to-change wear paddles manufactured from D2 steel.

Finally, a zig-zag separator is used to remove any remaining fines, ensuring a product quality suitable for extrusion.

Polypropylene Recycling - Explained

Given its significant level of popularity of PP within the plastic packaging industry, it is surprising that only 1% of PP currently being recycled; with the other 99% of the approximate 80 billion USD industry going straight to landfill each year.
PET and polypropylene recycling propellers agitating water to encourage separation
On top of this, despite the large-scale market value of PP, it has been made evident through market reports that the supply of recycled PP is a long way off meeting demand. For example, in North America alone, it has been estimated that there is a demand for 1 billion pounds of recycled PP. 

These statistics show a clear disparity between the supply and demand of recycled PP; therefore giving an insight into the huge potential of PP recycling. With recycling machinery quickly advancing its approach to PP recycling, the market is quickly evolving and becoming the cost-efficient, and not to mention environmentally-friendly alternative to landfilling.
Rotajet’s range of recycling equipment is exemplary of the potential that can be tapped into when it comes to recycling PP. With specially-designed equipment, Rotajet has taken all of the complexities and properties of PP into account in order to produce the ideal solution for recycling. 
With 5 key stages to the recycling process, each step can be fully taken care of with a Plastic Recycling Line, with very little need or operator input. With each being fully optimised to suit its intended in-feed plastic type, you can have full confidence that your machine will suit the exact needs of your operation.

Contact Rotajet

We aim to get back to any enquiry within 12 hours, so please do contact us if you are interested in a specific machine or would like to discuss a cleaning requirement. Our friendly team are happy to help with email or call +44 (0) 1924 271446.

Recycling Plants

Rotajet produces a full range of recycling plants for taking care of; PP, PE, PET, Containers, WEEE, Film, Batteries, and Mixed Rigids. This video shows a full plastic recycling line.

Rotajet Systems Ltd
Unit 14
Flanshaw Way
West Yorkshire

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