materials feature | Window profiles IQAP says that
its cold master- batches can cut the tempera- tures of PVC profiles and sidings
During the demonstrations, Deceuninck showed the benefits and performance of the recently launched Zendow#neo doors. “These far exceed the performance of traditional
PVC steel-reinforced doors,” said Degrande. The profiles do not use standard galvanised reinforce- ments, and both the frame and the sash have thermal reinforcement. The core consists of a combination of foam containing recycled PVC-U and steel wire. With the premium solution, thermal reinforcement is used in the frame profile on the one hand and continuous glass fibre in the six-chamber sash profile (82mm) on the other hand. Highly optimised thermal performance is the immediate result. Both Zendow#neo solutions – stand- ard and premium – are completely recyclable. Another design, iSlide#neo, is a sliding door that
combines the slim lines of an aluminium slider with the thermal performance of a PVC sliding door, using Deceuninck’s Endless Glassfibre technology. The upcoming launch of the new Zendow Alliance entrance door integrates Deceuninck’s Rovex pultrusion technology.
Stable market At Applied Market Information’s recent Profiles conference in Philadelphia, USA, Michael Schiller – founder of plastics consultancy HMS Concept – explained the potential benefits of switching from tin to calcium/zinc stabilisers for window profiles. While tin stabilisers help to stabilise the PVC against
the effects of heat – such as by substituting unstable chlorines, neutralising HCl and shortening polyene sequences – he said that calcium/zinc had distinct advantages. These include: low toxicity; no cross staining; low plate out; and better sustainability potential. He added that, while US profile extruders had little experience of calcium/zinc stabilisers, these have been
24 PIPE & PROFILE EXTRUSION | September 2016
widely used in Europe for more than 20 years, so their properties are well understood. On the downside, calcium/zinc stabilisers have a
narrow processing window and lower stability – as well as being a ‘black box’ solution, he said. Part of the solution is to supply calcium/zinc
stabilisers as ‘one pack’ solutions, which ensure that the final products have suitable properties – including stability and colour. However, calcium/zinc stabilisers will also require
‘co-stabiliers’. Choosing them correctly – and using them at the right dosage – can be complex, he said, and may require specialist help.
Alloy advantages Benvic has developed what it calls a new generation of thermoplastic alloys for the building industry. Olivier Bediot, of the company’s R&D tech services centre in France, said that its Thermavic range of PVC materials helps to improve the thermal break performance of window profiles. Its current ER109 range of materials already have a
thermal conductivity of 0.17W/mk, and are available in four colours (black, dark grey, light grey and white). The calcium/zinc based formulations are NF132 certified for outdoor exposure, and developed for assembly with aluminium. However, he said that new materials with greater
heat resistance are needed in order to develop new types of frames for applications such as skylights, conservatories and large windows. Thermavic is a heat-resistant version of PVC. “Its advanced thermoplastic properties overcome the
Vicat limitations of PVC,” he told delegates at AMI’s earlier PVC Formulation conference. The first grade is Thermavic ET292/0900, with a Vicat of 92°C, for both indoor and outdoor applications. Like
www.pipeandprofile.com
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