 |  | | KraussMaffei Berstorff Schaumtandex line with a twin-screw and a single-screw extruder
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| | |  | | GTZ realises with a Chinese XPS board producer a ZE75 / KE250 Schaumtandex extrusion line
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Production of CFC and HCFC-free expanded
polystyrene thermal insulation boards
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Hanover,
August 12, 2009
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Thanks to the support provided by the German
Technical Cooperation (Gesellschaft für Technische Zusammenarbeit GmbH – GTZ),
the first KraussMaffei Berstorff ZE75/KE250 Schaumtandex line can be delivered
to a Chinese XPS producer. This project was promoted within the frame of the
International Climate Protection Initiative (Internationale
Klimaschutzinitiative - IKI) by the Federal Ministry for the Environment,
Nature Conservation and Nuclear Safety (BMU) on the basis of a resolution of
the German Parliament. The line in question is designed for the production of thermal
insulation boards made of extruded polystyrene foam (in short XPS) in different
thicknesses using the eco-friendly blowing agent CO2. The background
to this technical solution is the phase-out of hydrochlorofluorocarbons (CFC)
and partly halogenated hydrochlorofluorocarbons (HCFC) that are still being
used as blowing agents in many countries all over the world.
China still has to deal with a building area of
several billion square metres where the national energy-saving requirements
introduced by the government in 2001 are not complied with. In North China, in particular, enormous amounts of heating
energy are wasted due to non-insulated facades and the environment is thus
needlessly polluted. For the few insulated buildings, mainly XPS insulating boards
expanded by means of ecologically damaging HCFCs (like R22/R142b) are used. The
blowing agent released from these boards depletes the ozone layer and presents
a substantial greenhouse potential thus leading to the dreaded global warming
effect.
The Schaumtandex ZE75/KE250 extrusion line is suitable for the use of
environmentally friendly blowing agents (like CO2, for instance).
This KraussMaffei Berstorff line features a ZE75 designed as primary twin-screw
extruder combined with a KE250 used as secondary single-screw extruder. The
ZE75 compounding extruder is rated for an output capacity of up to 1,000
kilograms per hour. Thanks to the excellent mixing performance of the
twin-screw extruder, recipes composed of up to eight components can be easily
processed. The downstream cooling extruder KE250 ensures optimum cooling of the
blowing agent containing melt. Owing to innovative screw geometries, higher
output rates can be achieved and the fine-cell XPS foam produced presents an
outstanding quality. The board processing line is designed for continuous
treatment of boards with different lengths and thicknesses and milled edge
profiles on all sides. The production capacity of the new line amounts to
200,000 cubic metres per year.
GTZ –
background information
The German Technical Cooperation
(Deutsche Gesellschaft für Technische Zusammenarbeit - GTZ) is a private
international enterprise specialized in supporting the Federal Government in
the implementation of overall development goals. The GTZ provides lasting
solutions for political, economic, ecological and social developments in a
globalised world and promotes complex reforms and change processes even under
the most critical conditions. Its corporate objective is to improve people’s
living conditions in a sustainable way.
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