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 | | FREEFOAM PROVIDES INCREASED UV PROTECTION | | | Freefoam Plastics Ltd | | 28/06/2007 | | | Freefoam Plastics, a leading manufacturer of lead-free PVC Roofline and Rainwater systems, has conducted a significant amount of research into the colour stability of PVC products when exposed to increased UV levels.
Back in the early 1990s the consensus was that 4 parts TiO2 (Titanium Dioxide) per hundred was adequate for UV protection of white products based on average regional UV levels. However, updated data from the National Radiological Protection Division of the Health Protection Agency shows that the worrying trend of increasing UV radiation levels has continued in 2005 as shown in the graph.
The implications of this trend are significant for all those involved with exterior PVC products - extruders, stockists, installers, raw material suppliers and homeowners too. Just as our skin needs protection if exposed over long periods to intense heat and UV sunlight, so too does PVC which has what is referred to as a 'tipping point' of UV exposure beyond which discolouration, chalking, crazing and embrittlement are rapidly accelerated.
Freefoam's products have never been at risk from this trend. Unlike a lot of its competitors, they have been supplying markets in southern France for some time, and had added the necessary 5-6 parts per hundred to all their fascia products for operational simplicity, whether they ended up in France, the UK or Ireland. | |
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