MATERIALS | MULTI-LAYER PACKAGING
Right: Inter- face’s Polarfin additive will be used to create LDPE multi- layer packaging that can be upcycled
temperature of 220-240°C, realistic PA blends in packaging streams – PA6 and several lower-melting co-polyamides – are processable at about 210°C,” he said.
BASF and Institute Cyclos-HTP have also
explained details behind the recycling of PE/PA multi-layer films in a 25-page publication. In tests, coextruded multi-layer films with PA6
and PA6/6.6 concentrations of up to 30% were used with tie layer materials. Cyclos-HTP tested the recycling compatibility and recyclability of these films in the PE film stream from commercial sorting processes for household flexible plastic packaging waste.
Bio-based barrier The drive towards sustainability means that more barrier films are now bio-based. Nuria Lopez, a polymers researcher at Aimplas in Spain, told delegates about its research into biodegradable barrier packaging. In a project called MultiBioBarrier, it has devel- oped – with partners Gaviplas and Nurel – a material that is 70% bio-based. At the same time, it is biodegradable and has a high oxygen and moisture barrier. This makes it useful for packaging products such as cheese. As well as being biodegradable, the multi-layer film had to be easily recyclable by separating the layers. Nurel developed the polymers, which have superior barrier properties to its existing Inzea grades, it said. The films can be processed by blown film technology – and have been used to make three- and five-layer products. Three grades have been developed: Inzea F18C
is transparent and sealable; FBH 10 has an oxygen barrier and is water-soluble; and FBT has an oxygen and water barrier. Aimplas was tasked with developing multi-layer structures from the materials, while Gaviplas will
scale up and validate the production process. Multi-layer films – using all three grades in either
three- or five-layer structures – have been pro- duced and tested at pilot plant scale. The five-layer structure (which included tie-layers) was transpar- ent and recyclable, while the three-layer version was compostable. n The next Multilayer Flexible Packaging confer- ence is held in Vienna, Austria on 15-17 November 2022. For more details, contact Agata Swietek (
agata.swietek@amiplastics.com) on +44 (0) 117 314 8111.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.plato-technology.de �
www.interfacepolymers.com �
www.ivv.fraunhofer.de �
www.basf.com �
www.ami.international �
www.cyclos-htp.de/cyclos-htp/ �
www.aimplas.es �
www.gaviplas.es �
www.nurelbiopolymers.com
TAKEthe Reins Meet Us at K!
EDI® Die Systems Hall 01 Booth E91
Experience Next Level Performance in Die Automation
IMAGE: INTERFACE POLYMERS
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 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58
