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Because
of their biological biodegradability, the use of bioplastics is especially popular in the
packaging sector. By far the most distributed form of bioplatics in this sector
are duroplastic packaging chips that are being produced from a starch base. Aside
from this, however, several other packaging products – manly used in the food
and cosmetics industries – can be made from compostable bioplastics. Technically
there are several methods by which bioplastic intermediates can be processed
into various products. As is the case with conventional plastics, they can be
blown to foils and multi-layer foils, they can be extruded, they are thermo-formable and deep-drawable, they can be printed, welded,
thermally sprayed or glued together.
The
use of bioplastics for shopping bags is already very common. After their
initial use they can be reused as bags for organic waste and then be composted.
Trays and containers for fruit, vegetables, eggs and meat, bottles for soft
drinks and dairy products and blister foils for fruit and vegetables are also already
widely manufactured from bioplastics.
With
cosmetic products, bioplastics are used not only as the outer packaging but
also for the tubes and pots in which the cosmetics themselves are contained. Certain
characteristics of bioplastics – such as their aroma barrier and the ease with
which they can be moulded – make them particularly suitable for use with
cosmetics and are continually being developed in order to make bioplastics an
even more attractive alternative for such packaging.
Composite
packaging made out of paper or cardboard with a bioplastic coating forms a whole
new category of compostable packaging and allows waste processing and recycling
without the need for complicated and costly waste separation methods. In the
area of waste management, compostable bags and containers for the collection of
organic waste already possess a considerable share of the market, whereas in
relation to most other types of packaging – such as for food and cosmetics – the
use of bioplastics remains secondary. Yet it is precisely in these areas that a
significant potential exists for the use of bioplastics, due to their
beneficial physical properties and lower costs of disposal (approximately 1
Euro/kg less than conventional plastics).
(Sources: FNR, European Bioplastics)
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