MATERIALS | SHEET
Right: Calendering is critical for producing extra-thick APET sheet for thermoforming large cups
Acrylic expansion Roehm recently expanded its range of Plexiglas ProTerra acrylic sheet, with two new offerings. ProTerra solid sheets are made of
around 90% recycled acrylic yet have the same quality as new products and identical technical properties, says the company. “This can help customers realise their design visions in a resource- efficient way,” said Dominic Schauber, market segment manager at Roehm. The new ProTerra White WM706 RC meets the need for translucent solid sheets made from recycled acrylic with a high degree of transparency. Previ- ously, there was only the near-opaque WM805 RC, with a light transmission of 3%. The new variant, with 30% light transmission, is aimed at applications such as illuminated advertis- ing. The material is available in a thickness of 3mm, while other thicknesses can be made on request. In addition, Roehm has developed ProTerra Black 9M806 RSC, a solid black sheet that is matte on one side and glossy on the other – to give store and exhibition booth designers greater design freedom. The velvety surface has the usual quality of
coextruded Satinice products and does not show traces of wear or fingerprints. The new material is currently available in a thickness of 3mm, with others available on request. Like existing ProTerra solid sheet, the two new
products are made using a special coextrusion process. The core is made of recycled PMMA, while the outer layers consist of new material. This offers a number of benefits: “Our partially recycled products do not differ
from those made entirely of new material in terms of visual appearance, their light-related properties or their processing,” said Schauber.
Sound performance At Intertraffic, a trade fair for mobility and traffic infrastructure, Roehm showcased its Plexiglas Soundstop solid sheets. The product has been used for
IMAGE: SML
some years as a noise and wind barrier along roads and railways – and can also be used as a water barrier in areas such as coastal roads and promenades. It was originally developed especially for noise barriers, as it has good airborne sound insulation properties and reduces traffic noise levels. Depend- ing on thickness, the sheets can provide a sound reduction index of up to 35 decibels. “Effective sound insulation along
traffic routes is essential to safeguard the health and well-being of everyone living and working near roads or railways,” said Giovanni Cucco, market segment manager for acrylic products at Röhm. “Protecting traffic routes and buildings against
storms, torrential rains and flooding is also becom- ing increasingly important.” To provide wind protection on bridges, Sound- stop solid sheets can be thermoformed into C-shaped shells, which are then assembled – one above the other – with gaps between each shell. This type of semi-solid wind protection significantly cuts the wind speed crossing traffic lanes. The solid sheets are available in various thick-
nesses, formats and colours, ranging from clear through translucent to opaque. There are different variants featuring embedded polyamide threads (for shatter protection) or embedded printed stripes (to prevent bird collision). The material can also be printed with customised patterns and designs.
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