Sustainable Plastics - January/February 2021 - 28

bioplastics
Palsgaard's plant-based polymer
additives benefit from the company's vast expertise in natural
emulsifiers for the food industry.
Palsgaard photos

Natural Solutions
for Enhanced
Food Safety
Bio-based additives offer significant benefits in an increasingly sustainable and
circular plastics industry, writes Christina Normann Christensen, Product &
Application Manager at Palsgaard. 'Plant-based additives provide major benefits over
synthetic alternatives, without compromising food safety or end-of life recycling'.

I

n a world with increased
focus on responsible and
efficient use of raw materials, plastic and particularly packaging articles are facing intensive scrutiny to move
toward more sustainable and
closed-loop solutions. While the
use of polymers from renewable,
non-fossil and recycled resources continues to gain momentum, 'minor' components such
as additives are often still overlooked, although they can have
a crucial effect on the processing, handling and functionality of
materials. Plant-based additives
provide major benefits over synthetic alternatives without compromising food safety or end-of
life recycling.
Brand owners in the food,
cosmetics and other consumer
markets are seeking effective
ways of reducing their carbon footprint and responding
to growing demands for more
sustainable products with natural and renewable ingredients.
People today want 'bio' solutions, not just in the food or skin
care items they buy, but also in
packaging. There, plant-based
additives help designers, converters and end-users of packaging plastic materials minimise
the impact of their products on
fossil depletion and waste. At the
same time, the quest for reducing food losses in a hungry world

28

P028_P029_SP_20210209.indd 28

requires packaging solutions capable of extending the shelf-life
of products. With a full range of
food-grade and bio-based polymer additives building on more
than 100 years of expertise in
natural emulsifiers, Palsgaard
is addressing these needs in a
fast-changing industry.

Dual Use Chemistry
When Einar Viggo Schou
invented modern plant-based
emulsifiers back in 1917, the
application focus was on foods
such as margarine, bakery, confectionery and ice-cream. The
resulting Palsgaard range of
natural emulsifiers added taste,
mouthfeel and texture while

extending shelf-life and using
fewer resources. In food production, these additives soon
played an instrumental role in
reducing spattering, preventing
thermal shock, controlling viscosity and facilitating aeration.
Backed by their fundamental
ability to mix oil and water, they
were eventually found to offer significant benefits also as
functional polymer additives in
non-food applications, such as
packaging materials. Named
Einar in memory of the company founder's entrepreneurship
and values, they serve as surfactants, dispersing aids, ageing modifiers, slip enhancers,
coatings and mould release
agents. As most important

among these, the surfactants
are of particular benefit to plastics used in the food packaging
industry. This is due to their
ability to reduce the fogging on
the inside and the accumulation
of static electricity on the outside of the packaging material.
Both properties rely on the
migration of the Einar additives
from within the polymer matrix
to the surface of the packaging material. There, in anti-fog
and anti-stat applications, they
interact with condensation
droplets on the inner surface or
attract ambient moisture to the
outer, respectively. Although
migration here is a desirable
effect, there are strict migration
limits that must be adhered to

Figure 2: The principle of migration: The EinarĀ® additives which are applied as internal additives migrate from
inside the polymer matrix to the surface where their surfactant nature lowers the surface energy of the polymer,
thus preventing fogging and static build-up.

January/February 2021

1/29/21 12:19 PM



Sustainable Plastics - January/February 2021

Table of Contents for the Digital Edition of Sustainable Plastics - January/February 2021

Contents
Sustainable Plastics - January/February 2021 - Cover1
Sustainable Plastics - January/February 2021 - Cover2
Sustainable Plastics - January/February 2021 - Contents
Sustainable Plastics - January/February 2021 - 4
Sustainable Plastics - January/February 2021 - 5
Sustainable Plastics - January/February 2021 - 6
Sustainable Plastics - January/February 2021 - 7
Sustainable Plastics - January/February 2021 - 8
Sustainable Plastics - January/February 2021 - 9
Sustainable Plastics - January/February 2021 - 10
Sustainable Plastics - January/February 2021 - 11
Sustainable Plastics - January/February 2021 - 12
Sustainable Plastics - January/February 2021 - 13
Sustainable Plastics - January/February 2021 - 14
Sustainable Plastics - January/February 2021 - 15
Sustainable Plastics - January/February 2021 - 16
Sustainable Plastics - January/February 2021 - 17
Sustainable Plastics - January/February 2021 - 18
Sustainable Plastics - January/February 2021 - 19
Sustainable Plastics - January/February 2021 - 20
Sustainable Plastics - January/February 2021 - 21
Sustainable Plastics - January/February 2021 - 22
Sustainable Plastics - January/February 2021 - 23
Sustainable Plastics - January/February 2021 - 24
Sustainable Plastics - January/February 2021 - 25
Sustainable Plastics - January/February 2021 - 26
Sustainable Plastics - January/February 2021 - 27
Sustainable Plastics - January/February 2021 - 28
Sustainable Plastics - January/February 2021 - 29
Sustainable Plastics - January/February 2021 - 30
Sustainable Plastics - January/February 2021 - 31
Sustainable Plastics - January/February 2021 - 32
Sustainable Plastics - January/February 2021 - 33
Sustainable Plastics - January/February 2021 - 34
Sustainable Plastics - January/February 2021 - Cover3
Sustainable Plastics - January/February 2021 - Cover4
https://www.nxtbookmedia.com