MACHINERY | WINDOW PROFILES
or incineration. It is using recycling technology that enables recycling of PVC profiles of all colours and of all different compositions – including profiles containing glass fibre reinforcement.
Boundary conditions At AMI’s recent Profiles conference in Pittsburgh, USA, Scott Grant, engineering manager at US- based Ecopuro, told delegates that the company’s Boundary Breaker additive technology helps to improve a range of properties – such as colour dispersion, energy reduction and extrusion throughput – in products including window profiles. The additive, when incorporated at loadings of
Above:
Deceuninck’s recycling line will eventually be able to recycle 45,000 tonnes/year of PVC
Plus technology allows higher amounts of regrind to be used in co-extruded profiles – which main- taining maximum processing safety. “Compared to mono-extrusion with virgin PVC, the total cost saving is 18%,” said the company. The technology allows 55-65% of recycled content to be used in the core, while its Thick-Layer technology coats up to 75% of the profile.
Back through the window Recycling has become a key dynamic in the production of window profiles, with suppliers keen to ensure that they maximise their use of recyclate. For instance, Belgian profile extruder Deceuninck
recently opened a new recycling line in Diksmuide, Belgium – which will eventually allow it to recycle up to 45,000 tonnes/year of PVC. As well as giving a four-fold increase of capacity, the new line is capable of recycling post-consumer as well as post-industrial PVC waste. “This will further reduce the ecological footprint
of our products, and reduce dependency from virgin raw material,” said the company. Input materials will be sourced from post industrial waste (customers’ offcuts as well as its own process scrap) and from first-generation PVC windows that are gradually being replaced after 30-40 years. The company expects the new facility to save more than 2 million windows per year from landfill
0.25-3%, reduces surface friction, increases bulk flow and improves formula dispersion at the boundary layer. He demonstrated how colour dispersion was
improved, and how the amount of flame retardant could be reduced. In window profiles, he said a 16% increase in throughput had been achieved, with an impact strength matched base and colour matches base. It led to savings of around US$100,000 per line for one customer, he said.
Optimised stability Robert Smith, technical service manager at PMC Organometallix, said that using optimised stabilisers can help reduce formulation costs for products such as window profiles. Tests showed that tin stabiliser composition – including the % tin, mono/di ratio, alkyl group, ligand group and co-stabilisers – can all have a large effect on processing and performance. For instance, 16.2% Sn was shown to offer equivalent processing and performance to tradi- tional 19% Sn TGA stabilisers. “Selection of the optimum composition is vital to achieving desired performance,” he said.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.greinerextrusion.com �
www.deceuninck.com �
www.ami.international �
www.ecopuro.com �
www.pmcorganometallix.com
The next edition of AMI’s Profiles conference runs in Cologne, Germany on 12-13 November. Several presentations are directly relevant to window profile production. Window profile extruder Aluplast will address the future of window technologies; Compolytics of Germany will present a PVC-based WPC material for use in window frames; EPPA will address the question: ‘What is a sustainable PVC window?’; and Dow Europe will showcase new EPDM-based sealing systems for window profiles. For more details, contact conference organiser Emily Nicholson on +44 (0) 117 314 8111 (
emily.nicholson@
ami.international).
22 PIPE & PROFILE EXTRUSION | September 2019
Advances in materials and technology for optimised production of plastic profiles for construction
12-13 November 2019 Cologne Marriott Hotel, Cologne, Germany
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