process feature | Sheet developments
Our new Lexan sheet products address these
problems.” Lexan H6500 is an opaque, solid, low-gloss PC/ ABS blend that delivers high stiffness for railway sidewalls, tables and seating. Its sustainable flame retardancy meets the needs of the Restriction of Hazardous Substances (RoHS) directive and it
delivers non-chlorinated and non-brominated product technology. It also complies
Octal says that its DPET process produces
higher quality sheet, less energy intensively
with current European standards including the French NF F16-101 M1F1 norm (at 2-4mm). It can be thermo- formed at a lower temperature than traditional PC materials, says Sabic Its moulded-in colour capability can help avoid the cost and environmental hazards of secondary painting. Lexan H6200 – which complies with the German DIN 5510 norm: S3 SR2 ST2 at 3mm and S4 SR2 ST2 at 4 mm – offers an attractive cost-benefit balance in less demanding applications such as cladding. It delivers high impact performance at low temperatures (ductility down to -20°C), and good colorability and thermoform- ing at lower temperatures than standard PC materials. Further to this, Sabic also offers an Ultem sheet solution based on polyetherimide (PEI) that features inherent flame retardancy and low smoke emission. Other materials used in this field include: Lexan H6000 sheet (for sidewalls, tables and seating); and Lexan F2000 sheet, available in clear transparent and translucent opal white colours and a good choice for light diffusers and light covers.
Sheet certification Sheet producer Spartech says that its Ultros Renu, Ultros Renu 90 and Royalite G50 products have all received certification from Scientific Certification Systems (SCS), which certifies and verifies attributes such as environmental and sustainability performance. The products all received the same certification, denoting that the respective products conform to SCS’s Recycled Content Standard V4-1, using at least 50% pre-consumer, recycled content. They are primarily used in the building and construction markets. The SCS certifications allow architects, designers, and other end-users to earn credits toward the US Green Building Council’s LEED Green Building Rating System. “It is imperative for manufacturers to provide
22 FILM & SHEET EXTRUSION | December 2012/January 2013
visibility to how they achieve and maintain sustainable product attributes,” said John Willham, chief technology officer at 3Form, which provides sustainable architec- ture and design materials. It uses Ultros Renu in several of its applications. Ultros Renu and Ultros Renu 90 are both PETG
products known for their high clarity and chemical resistance. They are mainly used in the building and construction markets, as well as in point of purchase displays, store fixtures and atriums. Royalite G50 is a non-PVC, non-halogen, flame-rated sheet product for use in wall coverings, ceiling tiles and other architec- tural applications where stringent building codes are required. “Spartech’s vision is to become the leading supplier
of sustainable plastic solutions, and using recycled content is a big part of that,” said Michael Malin, commercial development manager at Spartech.
Clean sheet Starlinger Viscotec, which specialises in PET upgrading and decontamination technology, showed its compe- tence in food grade applications for recycled post-con- sumer PET and HDPE at a recent open house event. Its Viscosheet line is used to make PET sheet from
post-consumer recyclate, usually in the form of soft drinks bottles. At the event, the line was producing 100% recycled PET sheet under production conditions. The RPET flakes had earlier been dried and decontami- nated in the deCON module. “Decontamination of PCR PET for direct food contact
reaches the highest level,” said Lisa Straub, food safety manager at Viscotec. “As an integrated system it fulfills the worldwide strictest new EFSA standard for infants.” After decontamination, the warm, dry flakes were
run through a colour sorter, where flakes that changed colour after thermal treatment – such as multilayer or PVC particles – can easily and cheaply be sorted out, into the sheet line‘s gravimetric feeding system. During the open house event, the mixing ratio of four
components had been changed during full production between dry and warm granulate, cold granulate, undried in-house flakes and PCR flakes from the deCON unit without noticeable property changes in the end product.
Click on the links for more information: ❙
www.ptiextruders.com ❙
www.octal.com ❙
www.kydex.com ❙
www.sabic.com ❙
www.spartech.com ❙
www.viscotec.at
www.filmandsheet.com
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