Companies like US based NatureWorks
and UK based Sanelco produce polylactide (PLA).
They cultivate the carbon from corn, which plants
remove from the air during photosynthesis and
store in grain starches. This is achieved by breaking
down the starches into natural plant sugars. The
carbon and other elements in these natural sugars
are then converted into a plastic, called polylactide
(PLA), through a simple process of fermentation,
separation and polymerisation. Packaging made
from PLA is therefore 100% nature-based. Growing
environmental awareness and consumer power coupled
with the rise in pre-packaged disposable meals
has increasingly targeted food manufacturers and
packagers to improve their environmental performances.
Besides environmental issues, the sharp rise in
oil and feedstock prices of PET and other polymers
has made PLA a competitive alternative.
Initiatives taken by PLA producers, equipment
manufacturers, packaging producers as well as
super markets have gone a long way in popularising
PLA and making its use wide spread.
BASF, Cargill Dow, Novamont and
Rodenburg Polymers, representing over 90% of the
European market for biodegradeable plastics, have
agreed to a number of measures designed to benefit
both the environment and the growing biodegradable
packaging sector. They have agreed to submit their
packaging materials and products for certification
by an independent certification body and label
their packaging products with a specific symbol
to inform consumers and retailers. The terms biodegradability
and compostability have been adopted as recommended
by the EU Packaging and Packaging Waste Directive.
Following analysis and testing carried out by
the Packaging International Research Association
(PIRA International), Stanelco's Starpol 2000
PLA has been approved for all food contact in
the EU. Food contact approval has also been granted
for Starpol 2000 for fruit and vegetables in the
US, with tests continuing for contact with all
other food types to meet Food and Drug Administration
standards. Starpol 2000 is a PLA available in
both flexible and rigid forms.
Husky, a very well-known perform
equipment supplier along with Cargill, the supplier
of biodegradable Nature Works polymer have developed
a compostable container on Sig blow moulding machine.
Husky along with SIG Corpoplast has developed
a fully compostable bottle that is compatible
with all municipal/industrial composting facilities.
One of the world's largest manufacturers of PET
bottles, Amcor is investigating the potential
for a new line of biodegradable bottles for the
European markets, to be made using PLA. Amcor
PET Packaging has already designed and produced
preforms and bottles made out of the renewable
material PLA in conjunction with Canada-based
Husky Injection Molding Systems. The capital costs
of a PLA system compared to a PET system are very
similar. The main cost component is resin, and
the cost of PLA is comparable to that of PET,
and is suitable for injection stretch blow molding.
PLA can be used for non-carbonated beverages such
as water, juices, milk, as well as edible oil
products. Biodegradable polylactide (PLA) bottles
can be easily segregated from polyethylene terephthalate
(PET) bottles in the waste stream.
Wal Mart has decided to switch from petroleum-based
plastics to corn-based. Cargill-owned NatureWorks
will initially supply 114 million packages a year
of its environmentally friendly containers for
fresh strawberries, brussels sprouts, cut fruit
and herbs to Wal-Mart. Plastic gift cards, salad
boxes, deli trays, tomato packages, plastic film
on donut boxes, and other applications will follow.
Wal-Mart and NatureWorks have spent about a year
extensively testing packages made from the plastic
known as PLA, or polylactic acid. NatureWorks
plastic has already been adopted by grocery chains
in Europe, and can be found in 7,300 grocery stores
worldwide.
|
{{comment.DateTimeStampDisplay}}
{{comment.Comments}}