Laminates included in the study; biodegradability is indicated by an asterisk. Reference materials are 1a and 1b for inner packs and 5a and 6 for outer packs. For inner packs: PP laminates are 1, PP hybrids are 2, PLA laminates are 3, paper laminates are 4. For outer packs: PE films are 5, PP film is 6, PLA film is 7, cellulose films are 8 and paper laminates are 9 (ref. 117)b.
| Material type | Number | Material type | Number |
|---|---|---|---|
| OPP/PE/MOPP | 1a | PE | 5a |
| OPP/PE/MOPP | 1b | Bio-based PE | 5b |
| Paper/PE/MOPP | 2a | Bio-based PE | 5c |
| Cellulose/PE/MOPP | 2b | OPP | 6 |
| PLA/PE/MOPP | 2c | PLA | 7* |
| MPLA/PLA/PLA | 3a | Cellulose | 8a* |
| PLA/AlOx coated PLA | 3b* | Cellulose | 8b* |
| PLA/SiOx coated PLA | 3c* | Paper/OPP | 9a |
| PLA SiOx coated/SiOx coated PLA | 3d* | Paper/PLA | 9b* |
| MPLA/MPLA | 3e* | Paper/PLA | 9c* |
| Paper/SiOx coated PLA/PLA | 4a* | Paper/PE | 9d |
| Paper/aluminum/PLA | 4b | Paper/BBP | 9e* |
| Paper/MPET/peelablea PP | 4c | Paper/BBP | 9f* |
| Paper/MPET/peelable PE | 4d | Paper/BBP | 9g* |
| Paper/EVA | 9h |
a
The layer can be easily removed, manually, from the laminate.
b
Abbreviations PP, poly(propylene); OPP, oriented poly(propylene); MOPP, metallised oriented poly(propylene); PE, poly(ethylene); PLA, poly(lactic acid); AlOx, aluminum oxide; MPLA, metallised PLA; SiOx, silicone oxide; MPET, metallised poly(ethylene terephthalate); BBP, bio-based polyester, that is not further specified as per the producer's request; EVA, ethyl vinyl acetate.