petfoodpro 3/2023

PROCESSING
can be applied to paper using conventional
coating equipment such as rotogravure
coaters and rod coaters. Dispersions of
polyolefin or other polymers are used as a
heat-sealable coating on the inside of the
packaging. The big advantage of these
structures is that they can be repulped
without problem in standard paper mills.
Repulping is a technology approach that
has been established in the paper industry
for many years. However, it cannot be
used for fluoropolymers because they are
not soluble in water.
2. Paper-based pouches with
a vacuum metallized layer of
EVAL and BOPP
This packaging concept is based on the
following conceptual structure:
Paper / vacuum metallized EVAL EVOH BOPP
/ laminated cast polypropylene
Kuraray’s ethylene vinyl alcohol
copolymers (EVOH) are marketed
as EVAL. A film made from EVAL
EVOH and biaxially-oriented
polypropylene (BOPP) is
metallized under vacuum with a
thin layer of aluminum, creating
a barrier to aroma, oxygen, light
and moisture. A simple cast
polypropylene foil is laminated
onto the inside of the pouch to
act as the sealing layer. A tenter
frame is used for coextrusion of
the BOPP and EVOH for the outer
layer. This packaging concept
avoids the use of a far greater
amount of aluminum in the form
of aluminum foil. Nevertheless,
EVAL EVOH provides an
excellent substrate for vapour
deposition of aluminum as
well as an extremely reliable
oxygen and aroma barrier. The
packaging therefore prevents
oxidation of the fats contained
in dry pet food. The vacuum metallized
layer is a very good light barrier and
preserves the vitamin C in the pet
food. This packaging concept uses the
Photo: shutterstock_2014776479
smallest possible amount of plastic and
also optimizes the repulpability of the
paper fibers because they can easily
Safety and reliability are top priorities for pet owners when it comes to their
beloved animals. The increasing demand for premium quality, high flexibility
and limitless reliability is constantly presenting petfood producers with new
challenges!
Whether wet food in cups, cans, jars and thermoformed packaging or clipped
products, such as dog sausage and fresh petfood filled to the exact gram,
or snacks, such as filled and unfilled chews, treats, sticks or stripes:
VEMAG offers reliable solutions with flexible machine systems!
VEMAG: Boundless Passion for YOUR Solution!
www.vemag.de · e-mail@vemag.de
Issue 3 2023
39