MATERIALS | THIN WALL PACKAGING
Sartori said its stronger impact resistance and dimensional stability made it appropriate for reusable applications. PP trays made from the material can be combined with PP lids for a monomaterial solution. The material is made with a non-phthalate catalyst and is free of plasticisers and BPA.
Fibre or plastic Kiefel Technologies has become a leader in ‘fibre packaging’ – as well as thermoformed plastic packaging – but the company says each type comes with its own advantages. Richard Hagenauer and Thomas Huber presented
Above: Kiefel machines are used to produce a wide range of cups and other packaging
In a similar trial, to replace PET, it was compared with 0.4mm PET sheet. Here, the PP cups had a 30% higher top load, a superior water vapour barrier and a similar 38% weight reduction. This came with more modest cost savings, compared to PS.
Foam benefit Gabriella Sartori, marketing manager at Lyondell- Basell, presented details of Moplen EP490H – a heterophasic PP copolymer that was designed specifically for extruded foamed sheet. The patented structure has high melt strength – for good foamability – as well as good process- ability and no gels with flat and annular die technology. It also offers high impact resistance for optimal food preservation at room and sub-zero temperatures, she said. A high melt strength allows it to form a fine, uniformly dispersed cell structure. It claims to have a lower density and higher formability than any conventional PP.
With annular die technology and physical
foaming, it has a density of 200 kg/m3; with flat die and physical foaming, it is 450 kg/m3; and with flat die and chemical foaming, density is 550 kg/m3.
details of technologies and applications in each field. In plastics, they showed the K-cup – a coffee cup that needs to be punched. This was made in ‘floatable’ PP rather than PS and could be made using high-speed machinery with a 91-cavity tool. Another cup – previ- ously made from paper – is thermoformed from 1.8mm thick material and weighs 5.7g. It is made in a 36-cavity mould, with 35 cycles/min. This led to a 15% higher cycle speed and output, said the presenters. In another case, they switched from PP to PET for engraved water cups. Packaging specialist Lacerta has also used bottle
flake to make a series of trays – from rPET sheet – of either 480 or 600 micron gauge. n The next Thin Wall Packaging event is held in Cologne, Germany on 26-27 November 2024. For more details, contact Rebecca Weir on +44 117 314 8111 (
rebecca.weir@
amiplastics.com).
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.amiplastics.com �
www.kpfilms.com �
www.perstorp.com �
https://grupaazoty.com �
www.synthomer.com �
www.lyondellbasell.com �
www.kiefel.com
An evolution for the market: Foamed PP sheet technology
• Thermoformable on conventional thermoforming systems
• Reduced material consumption up to 40 %
• Recyclable
Extrusion lines. Engineered to perform.
www.sml.at
IMAGE: KIEFEL
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50
