Biowerkstoff-Report - nova-Institut GmbH

Dr. Christian Bonten
Director Technologie, KuR Kunststoff GmbH,
Willich
Although the FKuR Kunststoff GmbH
product portfolio comprises the most diversified
bioplastics, the last years’ growth
is decisively due to bioplastics based on
PLA used for packaging of goods with a
short lifetime (food packaging, waste bags,
diaper back sheets, mulch films, etc.). In
this context, especially the biodegradability
and the associated alternative disposal
route are of benefit for the consumer. The
demand for bioplastics for durable goods is
continuously rising, and in the medium
term it will outreach the demand for bioplastics
for non-durabele goods. Since the
importance of biodegradability takes a back
seat in this context and sometimes is even
unrequested, the research and development
of FKuR increasingly concentrates on the
exclusive use of renewable resources.
Under the trade name Fibrolon FKuR develops
natural fibre reinforced compounds
(Wood-Plastics-Composites WPC), which
in contrast to many other WPC can easily
be injection moulded. Fibrolon is extrudable
to complex profiles, boards and hollow
Die Die
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Im Dieckfeld 8
27383 Scheeßel-Hetzwege
Tel. (0 42 63) 93 95-0
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Lectures
FKUR: WOOD-PLASTIC-COMPOSITES
(WPC) – A WOODEN MATERIAL OF THE
PLASTIC INDUSTRY
Wood-Plastic-Composites (WPC) – ein Holzwerkstoff
aus der Kunststoffindustrie
In general, biodegradable raw materials (CA, starch, PLA, PHA, PBS, etc.) are not
ready-made, but are tailored for the particular application by means of compounding.
This processing of biodegradable raw materials requires special
knowledge of both processing of additives and a gentle compounding process.
profiles and/or compression mouldable to
components for automotive interior equipment.
Fibrolon compounds have especially
high strengths and stiffness comparable to
wood. Fibrolon F series is a biodegradable
compound on the basis of polylactic acid
(PLA). The share of natural resources
amounts to almost 100%. Due to the excellent
bond of the wood fibres to the polymer
and the polymers to each other
Fibrolon F has a high mechanical strength,
which can be compared to conventional
fibre reinforced WPC – e. g. on the basis
of PP.
Cellulose can be found as a builder in all
plants – also in many plants that do not
serve as food. Hence cellulose is the most
frequently encountered carbohydrate on
earth. Vegetable fibres such as cotton, jute,
flax and hemp are nearly pure cellulose. Injection
mouldable cellulose ester compounds
from FKuR are marketed under the
brand name „Biograde“. They are made of
up to 100% natural resources (depending
on type) and the wood is taken from Euro-
12. JAHRGANG Nr. 4 / 2008 www.energie-pflanzen.de
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pean forests. Their excellent heat distortion
temperature (up to 122 °C) and suitability
for food contact in combination with injection
moulding allow to replace a wide
range of existing Polystyrene applications.
If biodegradability is an issue, Biograde is
tested according to EN 13432 by independent
organisations.
Bioplastics for packaging have to be processible
mostly to thin wall film with high
tear strength and – depending on the application
– in rigid or flexible versions.
Furthermore, the film has to have good barrier
properties against humidity, oxygen
and aroma. The trade name Bio-Flex stands
for PLA based Copolyesterblends which –
according to the respective type – are composed
of up to nearly 100% natural resources.
Bioplastics in packaging mostly replace
conventional materials such as polyethylene
of low density (PE-LD), of high density
(PE-HD) as well as polystyrene (PS) and
polypropylene (PP).
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Weitere aktuelle Meldungen: www.nachwachsende-rohstoffe.info Biowerkstoff-Report, Okt. / Nov. / Dez. 2008 29
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