Tell us about your production challenge

The ubiquitous plastic shopping bag was first designed as a reusable carrier. Its inventor, Sten Gustaf Thulin, will have been appalled to see his creation turn into a single-use object. But this disposable tendency is common to all plastic materials, from screw taps to milk carton lining. With plastic recycling equipment, however, plastic waste can be reprocessed and given a second lease of life.

Which recycled plastic equipment do you need?

complete production line to make wood and food pellets

Complete pellet line

Large industries are shifting towards more environment-friendly technology, such as recycling wastes and...
a pellet mill to produce wood, food and feed pellets

Industrial pellet mill

At the industrial level, the application areas of pellets range widely in fields such as feeds, biomas...

High performance classifier

For ultrafine classifying operations in inline mode of all types of fine to medium-fine products...

Pre-crusher of plates

With a pre-crusher continuous flakes are made into pieces, before granulation.

Fine cutting mill

When you want to mill soft to medium-hard plastics in the fineness range of several hundred µm to 2 mm, a f...

Torsion-resistant shredder

If you are shredding very difficult materials, you may need to choose a special construction to a...

Polymer line granulator

When it comes to the low-dust and cost-effective comminution of mouldings, blow mouldings and sprues ...

Pelleting machine

Form pellets with the uniform length for a dust-free, cylindrical granulate, pellets with smooth surface an...

Basket extruder

Low pressure extrusion for the production of slightly dispersed dust-free granulates. For shingled, highly por...

Pusher centrifuge

Pusher centrifuges are continuously operating filter centrifuges and can have several basket stages dependi...

Robot palletizer

Palletize up to 1,800 large industrial bags per hour at a multi-pick-up configuration.
a pellet hardness tester

Pellet hardness tester

Control the quality of your pelletizing processes using a pellet hardness tester. Pellet hardness is o...

Pelleting press with overhead drive

Production of certain pelletized products requires working with output products of a pa...

Laboratory extruder

Products can be extruded with a variety of shapes and characteristics by controlling the nozzle geometry ...

Extruder with annular gap expander

Products can be extruded with various shapes and characteristics by controlling the nozz...

Reclaim crusher

Waste products and rejected materials are inevitably generated from any gypsum products manufacturing process....

Hygienic FIBC handling line

There are many considerations when handling FIBC's (Flexible Intermediate Bulk Containers) or Bi...

Shell and tube heat exchanger

Heating, cooling and tempering are important processes in the ...

Industrial drying cabinet

The production of high-quality biltong and similar dried meat products can pose problems with main...

Recirculating batch dryer

Drying can be the most energy and time-consuming process in the food industry. This can have an ef...

Solid biomass screening and crushing equipment

Biomass fuels come in many forms and often include impurities that can dama...

Self-cleaning candle filtration system

Separating solids from liquids by filtration requires frequent cleaning or replaceme...

Select your recycled plastic process

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Tell us about your production challenge

When selecting production equipment for a production plant, it is important to talk to someone with experience in your field. Our industry experts have experience with various industrial applications. We’d love to help you!
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Treat polyolefins with heat to depolymerize the plastic material

Plastics are synthetic organic polymers than be broken into the basic monomers and reconstructed into new material. The most widespread type of plastics, polyolefins, can be chemically depolymerized at high temperatures.

Heat the polymers to 380-480°C in a fluid bed heater until the chains start cracking and turn into gas. The monomer vapor is collected in a condenser and returned to liquid. Use catalysts like kaolin, quartz, or zeolite to improve heat transfer and decrease the temperature required for cracking.

Mix additives in the recycling system to produce plastic pellets

The clean monomers are ready to be refabricated into new plastic material. Melt the material through an extruder to produce plastic pellets.

Depending on the intended use of the end product, the raw material feed can be compounded with other additives such as fire-retardants, impact-absorbers, or colorings. Pellets from recycled plastic are a suitable base to manufacture masterbatches for the industry.

Use a twin-screw extruder for tighter control over the pelletizing process

Polymer modelling of plastics follows a similar sequence whether it is manufactured through a single-screw or twin-screw extruder. However, a co-rotating twin screw extruder allows greater control over the plasticating process.

As the feed material travels along the screw, friction forces and heat transfer from the barrel begin melting it. This process accumulates in a melt pool nearer to the inner barrel, where the polymer is subjected to increasing pressure and flows out through the die.

Separate the feed with specialized plastic waste processing equipment

Plastic types, for example HDPE, PVC and PET, all behave in different ways when subjected to mechanical and chemical processing. Separate the primary material into the right streams to prevent contamination down the plastic recycling production line.

A sink-float separator classifies the pieces by density. High-density plastic polymers sink when conveyed to a water-filled tank, whereas low-density pieces float. An alternative method is an optic scanner that sorts plastic pieces according to their capacity to absorb light.

Grind the plastic to improve the recycling process

Resize the feed material into uniform dimensions to prepare it for processing. Grind the plastic into flakes or filaments by passing the pieces through a shredder.

Besides making the stream more workable, reducing the size of the stream makes it easier to pick out impurities during the washing line stage. Contaminants such as metals or adhesive chemicals could compromise the quality of the final product. But resizing the feed material facilitates the segregation of valuable plastic from undesired particles.

Processing steps involved in recycled-plastic making

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