{"id":13572,"date":"2025-05-29T10:35:19","date_gmt":"2025-05-29T08:35:19","guid":{"rendered":"https:\/\/www.energycle.com\/?p=13572"},"modified":"2026-05-08T19:19:31","modified_gmt":"2026-05-08T11:19:31","slug":"kako-linija-za-zgusnjavanje-poboljsava-ucinkovitost-recikliranja-plastike","status":"publish","type":"post","link":"https:\/\/www.energycle.com\/hr\/kako-linija-za-zgusnjavanje-poboljsava-ucinkovitost-recikliranja-plastike\/","title":{"rendered":"Tro\u0161kovi skra\u0107ivanja cijene za zagusjeni film: Masena gustina i matematika za transport"},"content":{"rendered":"\n

Looking at equipment specs?<\/strong> See the full product page for capacity tiers (500–3,000 kg\/h), 3-year total cost of ownership, and output bulk density specs — our PP\/PE film shredding and densifying line<\/a>.<\/p>\n\n\n\n

Film densification is an economics decision, not a technology decision. The math is straightforward: loose post-consumer film at 35–55 kg\/m³ bulk density wastes 80–90% of every truck, container, and warehouse cubic meter. Densification raises bulk density to 350–450 kg\/m³ — a 7–10× volume reduction that turns every logistics cost line item into a savings line item.<\/p>\n\n\n\n

This article puts numbers on three economic effects of film densification: transport payload<\/strong>, storage footprint<\/strong>, and downstream extruder energy<\/strong>. Use the data below to size the financial case for densification equipment in your own recycling plant.<\/p>\n\n\n\n

The Bulk Density Math<\/h2>\n\n\n\n

Bulk density is the kg of material that fits in a cubic meter of space. Loose post-consumer film is among the lowest-density industrial materials anywhere — lower than wood chips, cotton bales, or shredded paper. The table below shows how bulk density evolves through a recycling line.<\/p>\n\n\n\n

Material state<\/th>Bulk density (kg\/m³)<\/th>Volume per ton (m³)<\/th><\/tr><\/thead>
Loose post-consumer film (untouched)<\/td>35–55<\/td>18–28<\/td><\/tr>
Baled film (wire-tied bales, 200 kg)<\/td>180–240<\/td>4.2–5.6<\/td><\/tr>
Shredded film (dry)<\/td>80–120<\/td>8.3–12.5<\/td><\/tr>
Washed wet flake<\/td>200–280<\/td>3.6–5.0<\/td><\/tr>
Densified film (squeeze-densifier output)<\/td>350–450<\/td>2.2–2.9<\/td><\/tr>
Pelletized rPE\/rPP<\/td>520–650<\/td>1.5–1.9<\/td><\/tr><\/tbody><\/table>
Bulk density ranges reflect typical post-consumer PP\/PE film and field-measured Energycle line outputs. Variation depends on feedstock contamination level and end-machine settings.<\/figcaption><\/figure>\n\n\n\n

The 7–10× jump from loose film to densified output is the largest single density step in the entire chain. Every cost downstream of densification compresses by the same factor.<\/p>\n\n\n\n

Transport Payload: 4-6x More Tons Per Truck<\/h2>\n\n\n\n

Trucks and sea containers fill on volume long before they fill on weight when carrying low-density film. A 40 m³ trailer holds 26 t at the legal weight limit but barely 1.5–2.2 t of loose film. Densification flips this: the same trailer carries 14–18 t of densified flake.<\/p>\n\n\n\n

Transport mode<\/th>Volume capacity<\/th>Loose film payload (t)<\/th>Densified film payload (t)<\/th>Payload gain<\/th><\/tr><\/thead>
Standard trailer<\/td>40 m³<\/td>1.5–2.2<\/td>14–18<\/td>7–10×<\/td><\/tr>
40-ft container<\/td>67 m³<\/td>2.5–3.7<\/td>23–28<\/td>7–10×<\/td><\/tr>
20-ft container<\/td>33 m³<\/td>1.2–1.8<\/td>11–14<\/td>7–10×<\/td><\/tr>
Roll-on\/roll-off rail wagon<\/td>120 m³<\/td>4.5–6.6<\/td>42–52<\/td>7–10×<\/td><\/tr><\/tbody><\/table>
Densified film payload reaches but does not exceed legal weight limits in most jurisdictions. Calculations assume 0.40 g\/cm³ densified output and 1.30 g\/cm³ loose-film effective bulk density.<\/figcaption><\/figure>\n\n\n\n

For a recycling plant shipping 4,000 t\/year of output, the transport-cost difference between loose and densified material at USD 0.08\/t·km over a 1,200 km haul is approximately USD 380,000 per year<\/strong>. Across three years, transport savings alone exceed the CapEx of an entry-tier densifying line.<\/p>\n\n\n\n

Storage Footprint: 80% Warehouse Reduction<\/h2>\n\n\n\n

Warehouse rent in industrial zones costs USD 4–9\/m²\/month in most emerging markets. A plant holding 30 days of buffer inventory at 4,000 t\/year throughput needs roughly 330 t on the floor at any time. The footprint required:<\/p>\n\n\n\n