show preview | Interpack 2017
turers to use it for vacuum skin packaging. The product is immediately soft without conditioning and has 50% less water uptake than PA6, says BASF. Also, bubble stability and BUR (blow-up ratio) can be significantly increased because of the higher melt stability. The new grade has a different O2
/CO2 transmission ratio to all
other polyamides and can be used for cheese ripening bags or modified atmosphere packaging. The second grade, Ultramid C37LC, allows manufac-
Active packag- ing can help to extend the shelf life of many products
marketing manager at Sealpac. The company will show its PerfoLid system – a
recloseable pack for fruits and vegetables that promises extended shelf life due to perforation of the top film. At the same time, it will focus on tray sealers and
thermoformers with high output, flexibility and durability – such as its TraySkin system, which is now available for two-compartment trays.
Active ingredients Active packaging – which can control moisture levels, and prevent the proliferation of germs – will also feature at the show. The Fraunhofer Institute for Process Engineering
and Packaging (IVV) recently studied the potential benefit of active packaging systems for perishable food, using the examples of cooked ham and mushrooms. Packaged mushrooms became discoloured after only
very short period of time, for instance. However, if the packaging has moisture control and contains table salt, it is possible to prevent condensation – and retain visual appearance. Similarly, oxygen absorbers in ham packaging delay discoloration, so that the fresh pink of the ham does not turn into a dull grey. According to the study, oxygen absorption in active packaging delays visible changes in product quality by as much as four days. “The idea was to develop a package that can take up
and regulate moisture,” said Cornelia Stramm of Fraunhofer IVV.
Co-polymer additions On the materials side, BASF will offer a broad range of products that it says will reduce environmental and ecological footprint while still being economically viable – including the launch of two new co-polyamides. Ultramid Flex F38L is a partly bio-based grade, with a softness and high transparency that allows manufac-
48 FILM & SHEET EXTRUSION | March 2017
turers of shrink film for food packaging to achieve higher hot water and hot air shrinkage. Films produced with it have a lower crystallinity and are much softer and more transparent than films made of conventional co-polyamide. By reducing the crystallisation tempera- ture and melting point of the product, the curling of asymmetric films with polyethylene (PE) or polypropyl- ene (PP) is reduced significantly. BASF will also highlight its joint venture with
Avantium – called Synvina – which aims to build up production of furandicarboxylic acid (FDCA) and polyethylenefuranoate (PEF). FDCA is made from renewable resources and is an
essential chemical building block for the production of PEF – which can be used to make food packaging and films. Compared to conventional plastics, PEF has higher barrier properties for gases like carbon dioxide and oxygen. Due to its higher mechanical strength, thinner PEF packaging can be produced and a lower amount of packaging material is necessary.
Fresh ideas Meanwhile, Dow will showcase its portfolio of expertise, technologies and packaging innovations its ‘Fresh to Table’ and ‘Move it Safety’ marketing concepts. These show how Dow contributes to reducing food waste, and to improving load stability of transported goods. “With one billion more mouths to feed by 2050, food
is a critical resource and food preservation is essential,” said Carlos Silva Lopes, Dow’s marketing director for packaging and speciality plastics for the EMEA region. “We believe that flexible plastic packaging contributes decisively to address the growing need for more respon- sible and convenient packaging.” And, while details are not yet available, Dow will
introduce a new adhesive that was developed to help reduce overall packaging cost, boost recyclability and extend the shelf-life of food packaging.
Click on the links for more information: ❙
www.sealpacinternational.com ❙
www.ivv.fraunhofer.de/en ❙
www.basf.com ❙
www.dow.com
www.filmandsheet.com
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