From Used Container to New Product
When an IBC tote reaches the end of its useful life as a container, its HDPE bottle enters the recycling stream. But what actually happens during the recycling process? How does a 50-pound polyethylene bottle become raw material for new products?
This article follows the complete journey — from our facility through the recycling process and into the products that emerge on the other side.
Step 1: Collection and Sorting
IBCs arrive at our facility from a variety of sources: buyback programs, direct customer deliveries, and regional collection routes. Each container is assessed and sorted into three categories:
For recyclable IBCs, the disassembly process begins.
Step 2: Disassembly
The IBC is broken down into its three primary components:
1. HDPE bottle: Cut free from the cage using pneumatic shears
2. Steel cage: Collapsed and separated; sent to steel recycling
3. Pallet: Wood pallets are evaluated for reuse or sent to mulch/biomass; steel pallets go with cage material
The bottle is our primary interest here. It's weighed, logged, and moved to the plastics processing line.
Step 3: Shredding
The HDPE bottle is fed into an industrial shredder — a slow-speed, high-torque machine with interlocking rotary blades. The shredder reduces the bottle into flakes approximately 1-2 inches in size.
At this stage, the HDPE flakes still contain label residue, adhesive, valve gasket material, and any residual product contamination. These contaminants must be removed before the HDPE can be pelletized.
Step 4: Washing and Flotation
The flakes move to a multi-stage wash line:
1. Pre-wash: Hot water rinse to remove loose contamination
2. Friction wash: Mechanical agitation in a caustic solution to remove labels and adhesive
3. Flotation tank: HDPE flakes float (density ~0.95 g/cm3) while heavier contaminants (dirt, gasket material, metal fragments) sink to the bottom and are removed
4. Rinse: Clean water rinse to remove caustic residue
5. Centrifugal dryer: Spins the flakes to remove surface moisture
After washing, the HDPE flakes are clean, white (or slightly off-white depending on prior contents), and free of significant contamination.
Step 5: Pelletizing (Extrusion)
The clean, dry HDPE flakes are fed into an extruder — a machine that melts the plastic and forces it through a die to create uniform cylindrical pellets approximately 3mm in diameter.
During extrusion, the HDPE is heated to approximately 230-260°C (450-500°F), well above its melting point of 130°C. This process also serves as a final quality filter: any remaining non-HDPE contaminants that survived the wash process will either burn off, be captured by the melt filter, or result in visible defects in the pellets that trigger rejection.
The extruder can also incorporate additives at this stage — UV stabilizers, colorants, or processing aids — depending on the intended end use of the recycled pellets.
Step 6: Quality Testing
Samples from each pellet batch undergo laboratory testing:
Pellets that pass testing are bagged in 50-pound sacks or loaded into bulk containers (often IBCs, completing a circular journey) for shipment to end-use manufacturers.
What Recycled IBC Plastic Becomes
Recycled HDPE from IBC totes has numerous second-life applications:
High-Value Applications
Medium-Value Applications
Lower-Value Applications
The Carbon Math
Recycling HDPE from IBC totes rather than producing virgin HDPE from petroleum feedstock saves approximately 1.5 kg of CO2 equivalent per kg of plastic recycled. For a single 50-pound IBC bottle, that's approximately 34 kg (75 lbs) of CO2 avoided.
At scale, the IBC recycling industry prevents an estimated 100,000+ metric tons of CO2 emissions annually in the United States alone.
Closing the Loop
At IBC Tanks Recycle, we process every IBC that comes through our facility with the goal of maximum material recovery. Our current recovery rate exceeds 92% by weight — meaning less than 8% of an IBC's total material ends up as unrecoverable waste.
Learn more about our recycling process or sell us your used IBCs.