Schott's glass vials add security to aerosol containers

More security is one of the benefits for patients provided by the new translucent aerosol container developed by Schott. Known as Schott Purgard, the double shell container is made of pharmaceutical type I glass with an outer polymer jacket (PP). With conventional aluminium containers a visual level check is not possible – which is why many asthmatics always carry several containers with them to be sure they have enough medication in case of an attack.

To introduce the drug into the respiratory tract a propellant is necessary, which in extreme cases can create a pressure of up to 15 bar inside the container. For pressure resistance, the design of the glass inlet has been computer-optimised and is sheathed in a 1mm thick outer thermoplastic layer. This double layer combination of materials enables Schott Purgard to withstand a pressure of up to 40 bar. Safety vents in the polymer shell ensure a controlled reduction in pressure if the glass inlet should be damaged. In this case the polymer jacket holds the glass inlet together and the valve even if the container is subjected to extreme force.

As the external dimensions are the same as those for conventional aluminium containers, this new solution is compatible with standard valves, filling lines and application systems. The outer polymer shell offers various design options for different shapes and colours to create a high acceptance level among specific target groups such as children. Colouring is also available for light-sensitive drugs as well as providing the polymer shell with UV stabilisers.