January/February 2021 - 14

PRODUCTION LINE
PRE- PACKAGED SALADS
" What we do is we combine the correct permeability of
film with a gas flush, " said Duncan. " And that will allow
us to instantly reduce the oxygen to prevent yellowing and
pinking, and instantly increase the carbon dioxide. "
" It's still just the natural respiratory
gases - oxygen and carbon dioxide -
that we use in the gas flush, it's just that
the gas flush gets the head space to those
optimal levels very quickly, " said Duncan.
While Coveris can be contacted
Proseal manufactures machinery that seals films like
Tray sealing technology
offers advantages to
retailers, especially in
the current crisis.
individually for packaging solutions,
when launching a new product Duncan said it's best if
equipment suppliers work together as a project management
team. Ideally, that team would include the packaging supplier,
the gas flushing equipment manufacturer and sealer equipment
providers. For the latter, Duncan mentioned Proseal.
" It makes communication a lot better for us to have a
team of technical service engineers that work closely with
packaging suppliers like Proseal that understand what the
sealing requirements are, " said Duncan, pointing to potential
compatibility issues that can arise without cooperation.
Together, that team evaluates everything from line speed to
temperature requirements for sealing to product respiration
rates. For the latter, it helps to have the right equipment on
site for testing, he said.
" The Witt mixers are really nice because they allow you
to change the composition of O2 and CO2, " said Duncan.
those supplied by Coveris to a flexible tray. It also applies
the pre-mixed gas necessary to modify the atmosphere
within the package before sealing.
Tray sealing technology offers
advantages to retailers, especially in
the current crisis. Top seal packaging is
secure, food-safe and tamper-evident,
and it allows for MAP.
" Current packaging for leafy greens
is a rigid bottom with a rigid lid, " said
Anna Leigh Prochaska, sales associate at Proseal. " You
can't modify the atmosphere with a rigid lid. You have to
have that film seal. "
Using film seals allows customers to see if packaging has
been tampered with prior to purchase as well, she said.
" We've seen a lot of interest from customers because they
want that food safety element, " she added.
Prochaska reiterated Duncan's comment on the importance
of working together as a product management team.
" Once our customer has decided what they want, we work
with their chosen film and tray suppliers to give them exactly
what they want, " she said. " It's important that all of those
parties are brought together in the initial conversations. "
" The customer has to be very involved in the process as
well because they know their product better than anyone
else, " she concluded.
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January/February 2021

Table of Contents for the Digital Edition of January/February 2021
