BIAX FILM | MATERIALS
He added that PET would need to meet new PPWR regulations coming into force in Europe – which includes stipulations such as being recycled at scale and having a minimum recyclate content. Regarding recycling at
scale, he said this was not yet defined for this packag- ing type – but added that single digit recovery rates were not likely to be acceptable. “Unlike PET bottles, trays
are not really harmonised yet,” he said. “But modern machinery can sort PET from other trays and can also separate mono layer from multilayer trays.” For recyclate levels, he
said hitting the 30% target should be “no issue in tray and film” as mechanically recycled PET with food contact allowance is already available. “Today, most R-PET
originates from bottles,” he said. “Tray material is becom-
ing more available, but since there is no shortage of R-PET from bottles it will keep a dominant position,” he added. For PET film recycling, the company began using R-PET from polyester film waste about a year ago – and the annual amount is increasing – but it is not suitable for food contact. “We do not expect a positive future opinion on mechanical recycled PET from polyester film by EFSA,” he said. This means that R-PET
from film will need to be chemically recycled for food contact approval, according to Kliesch.
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Mitsubishi has also developed RSCP 25/40 for cold peel applications – for trays stored below 10°C. This is dominated by offline peel film, but RSCP is an inline solution – so the peel layer is applied during initial film manufacturing. Benefits include a lower carbon footprint – by cutting a process – and a wider process window during tray sealing.
For its part,Dow will focus on advancing its TF-BOPE for mono-material solutions. The technology has so far proved successful, but the company says it needs to keep refining it. Martin Hill, application technology leader for food & specialty packaging in EMEA at Dow, said the company is creating a toolbox to allow production of sequentially stretched
BOPE with: low extrusion pressure and good thick- ness profile; an MD modu- lus up to 1300 MPa; a TD modulus up to 1800 MPa; haze below 5%; shrinkage below 8% at 120°C; and seal initiation below 90°C as needed. For printing, he said
Innate TF220 can be blended with TF80 to cover the full range of stiffness requirements.
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