Types
Plastic corrugated gaylords
A plastic corrugated gaylord is built for trips. It costs more than corrugated paper board and earns it back only when the same box goes round many times.
Plastic corrugated gaylords use plastic corrugated board instead of fiberboard. They come in 48 x 40, 48 x 48 or 48 x 45 in footprints, with sidewalls usually 24 to 50 in. They suit closed-loop programs where boxes make many trips between a supplier and a plant.
Plastic and paper side by side
| Question | Plastic corrugated | Corrugated fiberboard |
|---|---|---|
| Built for | Many trips on a closed loop | One trip or a few |
| Humidity | Does not lose strength to damp air the way paper board does | Loses about half its compression strength from 50% to 90% relative humidity |
| Recycling at end of life | Plastic recycling stream | OCC; corrugated boxes had a 96.5 percent recycling rate in 2018 |
| Return freight | Must come back to pay off | Can go one way; knocked-down boxes ship flat |
| Good for | Parts loops, repeating suppliers, wet environments | One-way shipments, scrap, mixed supply chains |
When a returnable plastic box makes sense
Automotive packaging for ocean containers is generally one-way because returning it costs too much, and spare parts shipped to service centers usually go in expendable packaging. The same logic holds for gaylords. A plastic box pays off when it comes back. If a box leaves your site and does not return, corrugated is cheaper and ends up in the OCC stream.
What we do with plastic
This desk is built around corrugated gaylords, rated by stack height. Plastic boxes do not lose strength to humidity the way paper board does, so the Stack Check estimate does not apply to them. If you run a closed loop, put the loop on the request: the footprint, the loop length and how many trips you expect.
- Closed loop of a few suppliers, many trips: plastic.
- One-way shipments and scrap: corrugated.
- Wet environment, cold storage and many trips: plastic.
- Dry, short stand, one or two trips: corrugated, Grade A or B.
Related: rectangular gaylords, new or used and recycling.
What to check on a used plastic box
- Cracks at the corners and along the fold lines, where plastic corrugate flexes most.
- Staining or residue on the inside walls; a returnable box that carried oil or chemical product needs a different answer from one that carried parts.
- Whether the lid, the bottom pad and the sleeve all belong to the same box. Mixed sets rarely stack square.
Plastic corrugate does not take on water the way paper board does, which is the usual reason to ask for it. It is also harder to recycle in the paper stream, so say on the request whether the box is meant to be reused or retired.
Questions, answered
Are plastic gaylords stronger than corrugated?
They do not weaken in damp air the way paper board does, which matters on cold docks. Their capacity is the maker's figure; Stack Check is built for corrugated.
Sources and last reviewed
Facts on this page were last reviewed 2026-11-11.
- Nelson Company: when is a container a gaylord: A packaging supplier on when a container counts as a gaylord.
- PaperIndex Academy: humidity and corrugated strength: How corrugated board loses compression strength as relative humidity climbs from 50% to 90%.
- EPA: paper and paperboard material-specific data: United States recycling rates for corrugated boxes and other paper.
- Automotive Logistics: ocean container packaging: Trade press on why ocean-container packaging is usually one-way.
- Macfarlane Packaging: how to pack automotive parts: A packaging firm on how to pack automotive parts.