PVC | INNOVATION
aggregate with recycled plastic and showed a thermal conductivity coefficient lower than the reference mortar. Moreover, mortars containing plastic aggregates had better thermal insulation properties than conventional ones, which help to control heat loss from buildings during winter and heat gain during summer. The reduced thermal conductivity is also due to the low density, which depends both on the presence of plastic aggregates and on the in- creased induced porosity. This is an interesting reduction in the civil engineering field, where the potential amount of materials needed is huge. Even though the replacement of the siliceous aggregate with PVC residues leads to a decrease in mechani- cal properties, opportunities in the use of these materials are not affected, especially for applica- tions that do not require a structural function. Finally, the reduction of water absorption by capillarity showed that the incorporation of various types of plastic aggregate can improve the permeability behaviour of cement-based compos- ites, making them more durable in case of aggres- sive chemical agents and weathering environ- ments. The participants add that the PVC Upcycling
project demonstrate that innovative PVC cable recycling might generate further benefits in scientific, environmental, and economic terms, transforming a linear economy model into a circular economy one at higher added value.
Window profiles BASF has developed a new grade of its Ultradur polyesters that can improve the proper- ties of PVC window profiles and provide a good recycling solution for composites of Ultradur and PVC. Ultradur B4040 G11 HMG HP green 75074 can be used for co-extrusion with PVC and is now available with a significantly improved property profile. With this new Ultradur grade, PVC window profiles can be mechanically stiffened in the co-extrusion process. Compared with steel stiffening, the profile is lighter and can be produced at lower cost without compromising on stability and with improved insulation. Slimmer geometries are also potentially possible.
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Above: A new grade of Ultradur from BASF can be used for co-extrusion in PVC window profiles
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IMAGE: BASF
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