{"id":19470,"date":"2026-05-15T15:00:29","date_gmt":"2026-05-15T07:00:29","guid":{"rendered":"https:\/\/www.energycle.com\/"},"modified":"2026-05-15T15:00:29","modified_gmt":"2026-05-15T07:00:29","slug":"%ed%94%8c%eb%9d%bc%ec%8a%a4%ed%8b%b1-%ec%9e%ac%ed%99%9c%ec%9a%a9-%ec%9e%a5%eb%b9%84-3","status":"publish","type":"post","link":"https:\/\/www.energycle.com\/ko\/%ed%94%8c%eb%9d%bc%ec%8a%a4%ed%8b%b1-%ec%9e%ac%ed%99%9c%ec%9a%a9-%ec%9e%a5%eb%b9%84-3\/","title":{"rendered":"\ud50c\ub77c\uc2a4\ud2f1 \uc7ac\ud65c\uc6a9 \uc7a5\ube44: \uc644\ubcbd\ud55c \uc0b0\uc5c5 \ub77c\uc778, \uc124\uba85"},"content":{"rendered":"\n
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Quick answer:<\/strong> Plastics recycling equipment is the industrial machinery that turns post-consumer or post-industrial plastic waste into clean, reusable raw material \u2014 typically pellets or flakes. A full line includes six matched stages: pre-sorting and size reduction, granulating, washing, drying, pelletizing, and quality control. The right equipment depends on the polymer (PET, PE, PP, HDPE, PVC, EPS), the input cleanliness, and the target throughput.<\/p>\n\n<\/blockquote>\n\n\n\n

What plastics recycling equipment actually means<\/h2>\n\n\n\n

When buyers search for plastics recycling equipment, they usually mean one of two things: a single machine that performs one stage (a shredder, a granulator, a pelletizer), or a complete recycling line that combines several machines into a continuous process. This article covers both \u2014 but the focus is on the line, because that is what determines whether a project becomes profitable.<\/p>\n\n\n\n

A complete plastic waste recycling equipment line takes mixed or sorted plastic input (bottles, film, regrind, post-industrial scrap) and outputs material specs that buyers in the polymer supply chain will pay for \u2014 clean flakes, washed regrind, or pellets with controlled MFI (melt flow index) and moisture. Every stage in the line either adds value (cleaning, sizing, homogenising) or is a hidden cost (energy, water, labour). The job of selecting equipment is to minimise the second while protecting the first.<\/p>\n\n\n\n

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Key takeaway:<\/strong> Buying equipment one machine at a time almost always costs more than designing the line upfront. Capacity mismatches between stages create bottlenecks that throttle the entire line.<\/p>\n\n<\/blockquote>\n\n\n\n

The six stages of a plastics recycling line<\/h2>\n\n\n\n

Almost every industrial plastics recycling system, regardless of feedstock, follows the same six stages. The equipment that fills each stage differs by polymer and input condition, but the sequence is consistent.<\/p>\n\n\n\n

#<\/th>Stage<\/th>Equipment<\/th>What it does<\/th>Typical capacity (kg\/h)<\/th><\/tr><\/thead>
1<\/td>Pre-sorting & size reduction<\/td>Shredders, crushers, balers<\/td>Reduces incoming bales or bulky scrap to manageable pieces<\/td>300 \u2013 3,000<\/td><\/tr>
2<\/td>Granulating<\/td>Granulators with screen sizes 8\u201320 mm<\/td>Converts shredded plastic into uniform flakes<\/td>300 \u2013 2,500<\/td><\/tr>
3<\/td>Washing<\/td>Friction washers, hot-wash tanks, sink-float separators<\/td>Removes labels, dirt, oils, food residue, and unwanted polymers<\/td>500 \u2013 4,000<\/td><\/tr>
4<\/td>Drying<\/td>Centrifugal dryers, thermal dryers, silo storage<\/td>Reduces moisture to <1% before extrusion<\/td>500 \u2013 4,000<\/td><\/tr>
5<\/td>Pelletizing \/ extrusion<\/td>Single- or twin-screw extruders with degassing<\/td>Melts flakes and produces homogenous pellets with controlled MFI<\/td>300 \u2013 2,000<\/td><\/tr>
6<\/td>Quality control & sorting<\/td>Metal detectors, eddy-current separators, NIR sorters<\/td>Removes metallic contamination and off-spec material before packaging<\/td>Full line throughput<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Stage 1 \u2014 Pre-sorting and size reduction<\/h3>\n\n\n\n

Every line starts here. A bale of post-consumer PET is too dense to feed directly into a washing tank; a single soft-drink bottle is too small to handle without reducing it to a controlled particle size. Shredders<\/a> \u2014 single-shaft for soft input like film, twin-shaft for mixed rigid input \u2014 reduce material to roughly 30\u201380 mm pieces. Output goes directly to the granulator unless the line includes a pre-wash step for very dirty feedstock.<\/p>\n\n\n\n

Stage 2 \u2014 Granulating<\/h3>\n\n\n\n

Granulators<\/a> take the shredded output and produce uniform flakes (commonly 8\u201314 mm for PET, 10\u201316 mm for film). Screen size determines flake consistency and washing efficiency. Smaller flakes wash more thoroughly but cost more energy to produce and create more fines that are lost in downstream stages.<\/p>\n\n\n\n

Stage 3 \u2014 Washing<\/h3>\n\n\n\n

Washing is the most expensive line in the budget after the pelletizer \u2014 and the most important. A weak washing stage is the single biggest reason recycled-plastic pellets sell at a discount. For PET bottles, a full hot-wash with caustic dosing removes glue residues from labels; for PE\/PP film, friction washers remove agricultural soil and pesticide residue. Sink-float tanks separate PET (sinks) from PP\/PE caps and labels (float) \u2014 this single separation can double the value of the output.<\/p>\n\n\n\n

Stage 4 \u2014 Drying<\/h3>\n\n\n\n

Wet flakes destroy extruder output. PET in particular hydrolyses at extrusion temperature if moisture exceeds 50 ppm \u2014 the resulting IV drop makes pellets unsuitable for fibre or sheet applications. Centrifugal dryers handle bulk water removal; thermal dryers or vacuum hoppers bring the final moisture to spec.<\/p>\n\n\n\n

Stage 5 \u2014 Pelletizing and extrusion<\/h3>\n\n\n\n

The extruder<\/a> melts, filters, degasses, and re-forms the polymer. Twin-screw extruders are now standard for PET because the venting is needed to remove residual moisture and volatile contaminants. Single-screw extruders remain the workhorse for clean PE, PP, and HDPE regrind. Underwater pelletizing produces spherical pellets favoured by injection moulders; strand pelletizing produces cylindrical pellets favoured by fibre and sheet producers.<\/p>\n\n\n\n

Stage 6 \u2014 Quality control<\/h3>\n\n\n\n

Metal detectors are non-negotiable \u2014 a single metal fragment can destroy an extruder screw worth tens of thousands of dollars. Eddy-current separators remove non-ferrous metal (aluminium foil from food packaging is the typical culprit). NIR (near-infrared) sorters identify polymer type at speed and reject off-spec material before it contaminates the output stream.<\/p>\n\n\n\n

Choosing plastics recycling equipment by polymer<\/h2>\n\n\n\n

Polymer chemistry dictates almost every equipment decision. The same line cannot economically process PET and LDPE film without major reconfiguration. The table below summarises the equipment differences for the four most common industrial feedstocks.<\/p>\n\n\n\n

Polymer<\/th>Typical input<\/th>Critical equipment<\/th>Common output<\/th>Pitfall to avoid<\/th><\/tr><\/thead>
PET<\/td>Post-consumer bottles, bottle flakes<\/td>Pre-wash, hot-wash with caustic, sink-float, thermal dryer, twin-screw extruder with venting<\/td>Bottle-grade pellets, fibre-grade pellets<\/td>Skipping caustic wash \u2192 glue residue \u2192 IV drop<\/td><\/tr>
PE \/ PP Film<\/td>Agricultural film, shopping bags, industrial film<\/td>Single-shaft shredder, friction washer, centrifugal dryer, densifier, twin-screw extruder<\/td>Recycled film pellets<\/td>Wet pellets \u2014 film holds water; under-drying ruins output<\/td><\/tr>
HDPE \/ PP Rigid<\/td>Drums, crates, automotive parts<\/td>Twin-shaft shredder, granulator, hot-wash, single-screw extruder<\/td>Rigid-grade pellets for blow moulding and injection moulding<\/td>Mixed polymer contamination \u2014 sink-float is mandatory<\/td><\/tr>
EPS \/ Polystyrene<\/td>Fish boxes, packaging waste<\/td>Densifier or compactor, granulator, single-screw extruder<\/td>Densified EPS ingots, GPPS pellets<\/td>Trying to ship low-density EPS \u2014 densification at source is non-negotiable<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Capacity sizing: matching equipment to throughput<\/h2>\n\n\n\n

Capacity quoted by manufacturers is rarely the capacity you get in production. The published figure is usually peak throughput with clean, dry, perfectly sized input \u2014 conditions that exist only in laboratory tests. Real-world capacity sits at 60\u201380% of nameplate, depending on input contamination and downtime.<\/p>\n\n\n\n

A useful planning rule:<\/p>\n\n\n\n

  1. Define the annual tonnage target (e.g., 6,000 tons\/year of clean PET pellets).<\/li>
  2. Convert to hourly throughput assuming 6,000 operating hours per year \u2014 in this example, 1,000 kg\/h.<\/li>
  3. Specify equipment with nameplate capacity 1.3\u00d7 higher than required hourly throughput, so 1,300 kg\/h.<\/li>
  4. Size every upstream stage at least 1.2\u00d7 the downstream stage \u2014 the pelletizer is usually the bottleneck and must never be starved.<\/li><\/ol>\n\n\n\n
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    Key takeaway:<\/strong> If your pelletizer runs at 80% utilisation while the washing line runs at 50%, you have over-spent on washing capacity. If the reverse, the pelletizer cannot reach its specification target. Match the line, then sell the pellets.<\/p>\n\n<\/blockquote>\n\n\n\n

    New vs used plastics recycling equipment<\/h2>\n\n\n\n

    Used plastics recycling equipment is widely available \u2014 there is an active second-hand market for extruders, granulators, and washing lines. Below is an honest comparison; the right answer depends on the project stage and risk tolerance.<\/p>\n\n\n\n

    Factor<\/th>New equipment<\/th>Used equipment<\/th><\/tr><\/thead>
    Capex<\/td>Higher \u2014 full price plus installation<\/td>30\u201360% of new price; older units 70\u201380% off<\/td><\/tr>
    Lead time<\/td>8\u201316 weeks for standard models<\/td>Available immediately if found<\/td><\/tr>
    Warranty<\/td>12\u201324 months, parts and labour<\/td>Typically 'as-is' or limited 30-day<\/td><\/tr>
    Energy efficiency<\/td>Current motor and drive efficiency<\/td>Older motors run 15\u201330% higher kWh per ton<\/td><\/tr>
    Spare parts<\/td>Available from manufacturer for life of product<\/td>Risk of obsolete parts on 15+ year machines<\/td><\/tr>
    Best for<\/td>Long-term production, regulatory-sensitive output, food-contact<\/td>Pilot lines, secondary capacity, low-margin commodity output<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    What to ask plastics recycling equipment manufacturers (RFQ checklist)<\/h2>\n\n\n\n

    Most quote requests fail on either side because the spec is too thin. The checklist below is the minimum information a serious equipment manufacturer needs to give you a meaningful quote and a realistic timeline.<\/p>\n\n\n\n

    Input specification<\/h3>\n\n\n\n