The packaging for breadcrumbs
will also be compostable. Only, for
the packaging of crisps, made from
biopolyester and biopolyethylene
material, will be mechanically
recyclable. Both materials are
recyclable after separation.
Further research needs to clarify if
REFUCOAT´s project can also
develop a compostable structure
based on PHA and PLA.

Technical challenges

Q: What are the biggest challenges?
LORENA: The biggest challenge for
us is not only obtaining new
materials like PHA and PGA but
also being able to process them
using conventional equipment. The
processability of PGA material is
not easy, it is a new material which
shows very good barrier
properties, which makes it the
perfect biobased material for
barrier packaging structures.
Working with PGA requires a high
knowledge of its properties and
behaviour to overcome the
challenges the material faces to
become the perfect solution for
packaging structures. REFUCOATs
biggest challenge is developing
and understanding PGA material
for barrier packaging solutions.

“Packaging needs to be
recyclable, while at the
same time have optimal
barrier properties.”

Q: Do you get support or resistance
from the industry?
LORENA: The industry remark about
REFUCOAT is that the project is
rather complicated. But with a set
up that is looking for recyclable,
compostable multi-layered
material instead of mono-materials
this structural complexity is innate.
Multiple industrial organisations
have expressed their interest in the
REFUCOAT outcomes and results.

They are especially interested in
the development of the PGA
material for breadcrumbs and
chips and the PHA with improved
water vapour barrier for chicken
trays.