materials feature | Foamed sheet
Accurate metering Linde Gases has launched its DSD 400 high pressure metering technology for extrusion foaming, which uses carbon dioxide (CO2
) gas. The technology is an extension of its Plastinum Foam
E portfolio and claims to be highly accurate – guaran- teeing a constant mass flow and delivering good results even during fluctuating extruder pressures or under difficult climatic conditions. For many plastic foaming applications, particularly
when low densities and a high level of homogeneity are required, CO2
Dynactiv Power is a PVC sheet laminated with flexible solar cells, which prevents water evaporation while harvest- ing solar energy
ity supply that is independent of the grid,” said Tobias Haarburger, programme manager for Dynactiv Surfaces at Benecke-Kaliko. Engineers at Benecke-Kaliko and Israeli company Haogenplast developed the system together with water managers, high-voltage specialists, photovoltaic manufacturers, and scientific institutes. A pilot project proved that the technology was market-ready. Over a period of three years, a test system ran on an area of water covering 1,200m² with peak performance of 8.5kWp. “Previously, there were no systems that consistently
combined water protection with climate-friendly energy generation,” said Haarburger. Dynactiv Power is easy to install thanks to its high
degree of prefabrication. An excavator is enough to dig the reservoir. There is no need for expensive concreting or large construction sites, and the sheets (25m long, 1.5m wide) can be simply laid and connected. The tear-resistant sheets can bear the weight of both people and vehicles, allowing maintenance work to be per- formed with little effort.
must be accurately metered and is an attractive alternative to conventional
blowing agents. However, due to its physical properties in liquid form, CO2
completely free of gas bubbles to avoid cavitation issues and ensure consistently high quality foamed parts. DSD 400 delivers constant, identical foam structures by ensuring a stable mass flow during the continuous extrusion foaming process and is particularly well suited for manufacture of products such as XPS insulation boards for the construction industry, says Linde. The DSD 400 is unaffected by high ambient tempera-
tures, eliminating strong fluctuations which often results in quality deterioration.
Click on the links for more information: ❙
www.braskem.com.br ❙
www.armacell.com ❙
www.nexam.se ❙
www.vinnova.se ❙
www.sabic.com ❙
www.evonik.com ❙
www.benecke-kaliko.com ❙
www.linde-gas.com
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