PROCESSING | THERMOFORMING
Right: SBC 240 from Tekni- Films can be used as an alternative to PCTFE in thermoform- able blister applications
mechanical properties ensure problem-free usage of the cups in all commercial K-cup coffee systems. The cups can be recycled in water separation systems because their material density is below 1 kg/m3
.
The production of cups can only be consistent if the sheet specification, process parameters and tool are well balanced, says Kiefel. The production line is based on a Kiefel KTR 6.1
solutions – including the toughness of an impact copolymer, but stiffness and haze values close to that of a clarified homopolymer. These properties offer new options in packaging applications such as refrigerated deli containers, cold blended drink cups, and meat or seafood trays. The company says that – as well as preferring
more transparent containers – its clients were looking for new single-pellet resin solutions that do not require the addition of an elastomer to achieve the necessary performance characteristics. Prisma 6810 also maintains its ductile characteristics at temperatures as low as -10°C. Isla Regenye, Braskem America market segment
leader, said: “We believe Prisma 6810 meets the market’s growing preference for clearer containers and that its performance properties make it an ideal new candidate for material replacement opportunities.”
Below: Kiefel subsidiary Bosch Sprang has developed a thermoform- ing tool to make PP coffee cups
K-cup tooling Bosch Sprang, a subsidiary of Kiefel, has devel- oped a new patent pending thermoforming tooling system to make polypropylene (PP) coffee cups. The tooling system can be adapted to most tilting bed style thermoforming machines, so does not require any special machine adaptions. The technology is based on several multi-functional elements in the tool that enable and control specific mechanical properties of the coffee cups. These
Speed, a Bosch Sprang 91-cavity tool and Mould & Matic downstream equipment. The company recently presented the production line to the public for the first time. During NPE, Kiefel displayed the K-Cup production of the KTR 6.1 Speed. In June, the complete production system will be demonstrated at an open day at Kuhne in the USA.
Blister barrier Tekni-Films, part of Tekni-Plex, has developed a super barrier-coated (SBC) thermoformable film for pharmaceutical blister pack. Tekni-Films says that its SBC 240 can be used as an alternative to 4- and 6-mil PCTFE and cold formed foil in thermoformable blister applications. The triplex structure is ideal for applications such as pharmaceuticals, nutraceuticals, probiotics and related products.
As well as having high clarity, the material does
not require stiffening ribs – which improves on PCTFE’s ability to lie flat – or the oversized blister wells created by cold forming. This means that pharmaceutical companies can use a smaller blister card to contain the same number of tablets or capsules, or increase the count on a same-sized card. The end result is material cost savings throughout the packaging process, as well as improved production efficiencies. SBC 240 offers high moisture and oxygen barrier properties to protect susceptible products from degradation. It also has a wider processing window than PCTFE – as much as 20F – which helps it meet specific production speed preferences. It is created by applying a ‘next generation’ high-
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FILM & SHEET EXTRUSION | June 2018
www.filmandsheet.com
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