Recycling symbol answer

PAP 20 vs PAP 21: corrugated cardboard and paperboard

Both belong to the paper and fibreboard family, but the physical structure and typical packaging formats differ.

Quick answerPAP 20 is corrugated fibreboard with a fluted inner layer. PAP 21 is non-corrugated fibreboard or paperboard.

PAP 20

Used for corrugated transport boxes and protective packaging. A cut edge normally reveals a wave-shaped inner layer.

Used for solid folding cartons, cereal boxes and similar non-corrugated paperboard packaging.

Both often use a paper/cardboard route when clean and dry, but laminates, wax, food residue and local size limits can change the answer.

Common questions

Can PAP 20 and PAP 21 go in the same bin?

Often yes, but not universally. Check the local paper/cardboard instructions.

Is thickness enough to tell them apart?

No. The key feature is whether the board has a fluted corrugated layer.

Does either code guarantee recycling?

No. They identify material only.

Checked 2026-08-16