PRODUCT
DESCRIPTION
The Sink-Float Tank System by Chenxing Recycling Machinery delivers industrial-grade plastic purification, combining high-efficiency washing and density-based separation for PET/PP/PE flake recovery. Featuring stainless steel augers and adjustable paddle rotors, this heavy-duty wash tank removes 99% contaminants – including grease, soils, and chemical residues – through dual-auger scrubbing and detergent-enhanced rinsing. Engineered for precise material separation, its salt-adjustable density control isolates PET flakes from low-density caps/labels with <0.5% cross-contamination.
The corrosion-resistant design includes customizable tank dimensions (2-15m³) and slow-speed conveyors for 24/7 operation at 30% lower energy costs than conventional systems. Integrated FDA-compliant components ensure food-grade output, while modular construction allows seamless integration with granulators and friction washers. Backed by 20+ years of recycling expertise, Chenxing’s CE-certified solution is ideal for rigid plastic recycling plants and film-to-flake operations, achieving <1% residual impurities in final products.
ADVANTAGES
- Double helix cleaning system: independent drainage/collection helix, removes 99% of grease impurities
- Precise density control: through salt solution adjustment, PET/PP can be separated efficiently (cross contamination <0.5%)
- Food grade stainless steel structure: FDA compliant, chemical corrosion resistant
- Customizable blade configuration: adjust the speed and number of blades according to the material type
- Modular expansion design: tank capacity 2-15m³, suitable for different production line scales
TECHNICAL PARAMETERS
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PRODUCTS DETAILS
FAQ
1. What is a sink float tank and what is its function in a plastic recycling line?
A sink float tank is a separation system used to classify and sort plastic materials based on their density. It separates high-density plastics (which sink) from low-density plastics (which float) using a water-based medium—commonly in the PET bottle recycling and rigid plastic separation processes.
2. Which plastic materials can be separated with this system?
It is commonly used for separating:
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PP and PE (float) from PET, PVC, ABS (sink)
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Bottle caps (float) from PET flakes (sink)
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Film contaminants from rigid shredded plastic
This process enhances the purity of recycled plastic fractions.
3. How does the separation process work?
Materials are fed into the tank where water (or a water-salt solution) creates a buoyant medium:
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Low-density plastics (≤1 g/cm³) float to the surface
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High-density plastics (>1 g/cm³) sink to the bottom
The system is equipped with surface skimmers and bottom augers to discharge each fraction separately.
4. Is the tank suitable for wet and pre-washed materials?
Yes. The sink-float tank is designed to process wet flakes or granulated plastics that have already passed through shredding and pre-washing. It can also be integrated immediately after friction washers or pre-wash tanks.
5. What are the key features of your sink float tank?
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Stainless steel structure for corrosion resistance
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Adjustable water flow and level control
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Screw conveyors or chain scrapers for automatic discharge
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Integrated skimmer paddles to collect floating plastics
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Easy-clean drainage system for maintenance
