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2006-10-02 News Release
Nanogel filled multiwall plastics sheet sheds a different light The goal to bring in as much daylight in as possible at a new school gymnasium was reached with a multiwall polycarbonate plastics sheet filled with Cabot Nanogel.
Daylight has a high intrinsic value, in psychological, ergonomical and
economical terms, This is especially true in countries such as The Netherlands,
where sunlight is not always readily available. So, when the architects
from CITA were asked to design a new school gymnasium, they were keen
to bring in as much daylight in as possible. They selected multi-wall
polycarbonate plastics sheet filled with Cabot Nanogel*. To allow as much
light as possible to get in, whilst at the same time blocking annoying
and dangerous reflections and glare. Additional advantages include energy
savings, sound isolation and reduced risk of breakage.
Several options were evaluated. “Opaque plastic sheet and glass in a range of qualities were tested. In the end, the Nanogel filled multiwall sheets offered the best balance of light filtering and transmission. This solution convinced the client that using daylight was indeed possible – which prevented us from having to create a blind façade.” In this example, the reduction of light scattering and glare was an important
criterion, however, warmth and sound insulating properties were also vitally
important. Increasingly, architects, investors and home owners pay more
attention to the energy consumption of buildings – as they discover
that selecting the right building products can make a significant difference.
Although this often has to be balanced against comfort – for example
when it concerns the availability of daylight in homes or offices –
Nanogel
The material is used as a filler in several types of multiwall plastics sheet products. It weighs 60-80 kg/m³ - a considerable weight reduction compared to glass – and light transmission rates of up to 32% can be achieved. U-value is 0.89 (W/m².K) at a thickness of 25 mm. The sound insulation is remarkable compared to unfilled plastics sheets. The sound levels of rain falling on plastic roofs for example can be reduced by up to 50%. Especially lower frequencies (lower tones) are filtered out. Furthermore, Nanogel is hydrophobic, so it does not attract water, is resistant to moulds and will not weather. In addition, the safety advantages of plastics compared to glass are evident – a valuable benefit when dealing with children playing football. For this particular project polycarbonate sheet was used. The multiwall sheets are 2 by 2 metres and have a total thickness of 25 mm.
The Vrijenburgpoort School in Barendrecht was built by Koninklijke Van Waning Aanneming in Capelle aan de IJssel and the glazing was installed by Van Noordenne from Hardinxveld Giessendam. Nanogel is available in key applications such as light domes, glazing and wall systems offered by six major producers/installers. Besides Polycarbonate sheet, Nanogel is also used in glass fibre reinforced polyester and insulation glass. * Nanogel is a registered trademark of Cabot Corporation. Photos: Paul Gerlings
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