Naturally also part of the plentiful product range from HOPSON GLASS GROUP factories: heat-strengthened glass (TVG)!
The production process for heat-strengthened glass as per EN 1863 is very similar to that for toughened safety glass ( ESG ). Here too the glass panels are heated in the thermal strengthening process up to a temperature of more than 600°C and then blown with convective cold air. The crucial difference is that the cooling phase is much more restrained. This results in a glass with thermal and mechanical properties between float glass and ESG.
We always recommend heat-strengthened glass TVG when the resilience and thermal shock resistance of normal float glass is not sufficient, but toughened safety glass ESG with its fracture pattern (crumbly structure) would not offer the necessary residual load capacity in the case of breakage.
It is only when heat-strengthened glass TVG undergoes further processing to become laminated safety glass (VSG) that it acquires safety properties. This results in a safety glass that offers an ideal combination of constructive and, above all, active and passive safety properties.
The combination of augmented flexural strength, thermal shock resistance and residual load capacity offers ideal prerequisites for use as partitioning, overhead glazing, point-fixed glazing and structural glass elements, such as stairs.
