Plastic Recycling with Sink Float Tanks

Modern plastic recycling plants require more than simple flotation tanks. Within a complete https://plasticwashing.co.uk/plastic-washing-lines/, the density separation stage determines final polymer purity, extrusion stability and long-term profitability.

What Is a Sink Float Tank?

A sink float tank separates plastics based on density using water as the separation medium.

Polyolefins such as PP and PE float, while heavier polymers including PET, PVC and ABS sink. This physical separation principle makes density separation one of the most cost-effective purification methods in mechanical recycling.

Material entering the tank is typically size reduced using https://plasticwashing.co.uk/plastic-granulators/ to ensure consistent flake size before separation.

Our engineered systems incorporate:

Controlled laminar flow
Independent float and sink discharge
Continuous sediment removal
Heavy-duty stainless construction
Closed-loop water recirculation

Learn more here:
https://plasticwashing.co.uk/sink-float-tanks-2/

Material Trials Conducted at Our UK Manufacturing Facility

We offer material trials at our UK-based manufacturing facility, allowing customers to test their plastic streams prior to installation.

Trials evaluate:

Float / sink purity
Retention time optimisation
Contamination challenges
Full system integration

Systems are assembled and factory tested in the UK before global shipment.

Manufactured in the UK – Supplied Worldwide

All sink float tanks are:

• Engineered and manufactured in the UK
• Designed for continuous industrial operation
• Supplied globally
• Supported with installation and commissioning

UK manufacturing ensures quality control, shorter lead times and long-term technical support.

Frequently Asked Questions

What is a sink float tank used for in plastic recycling?

A sink float tank separates plastics based on density. Polyolefins float while heavier plastics such as PET, PVC and ABS sink, enabling efficient polymer separation within plastic washing lines.

Can sink float tanks process WEEE plastics?

Yes. Sink float tanks are widely used in WEEE recycling to separate engineering plastics from polyolefins and remove mineral contamination before further sorting.

Are material trials available before purchase?

Yes. Material trials can be conducted at our UK manufacturing facility to assess separation performance and optimise system design before installation.

Are the systems manufactured in the UK?

Yes. All systems are engineered and manufactured in the UK and supplied globally.

If you would like to learn more about Rotajet Sink Float Tanks, go to https://plasticwashing.co.uk/sink-float-tanks-for-plastic-recycling/

If you would like to see Rotajet’s full line of plastic washers, or our complete plastic plants; got to https://plasticwashing.co.uk

Visit Rotajetsystems.com to see our full range of products.

For more information on Plastic Recycling with Sink Float Tanks talk to Rotajet Systems Ltd