Packaging prize for PET heating technology

When the Brau Beviale 2011 opened its doors in Nuremberg on 9 November 2011, the German Packaging Institute awarded Krones the German Packaging Prize as an accolade for the firm’s microwave heating technology incorporated in its stretch blow-moulding machines.

With FlexWave - the new, innovative microwave heating technology from Krones - the process for producing PET containers in stretch blow-moulding machines has become more sustainable, more energy-economical, more flexible, faster and more versatile. The reason lies in the system’s innovative technology: FlexWave heats up PET preforms using microwaves - a process that not only differs significantly from conventional methods of stretch blow moulding.

Tthe system enables the heating process to be individually set and monitored for each PET preform. This means, firstly, that harmful environmental factors can be compensated for, and PET preforms can be mixed with different proportions of recycled material. Secondly, though, multicoloured bottles can be produced as well, opening up new options for container design. In comparison to conventional infra-red ovens, the microwave technology requires up to 50% less energy. FlexWave also scores well in terms of shorter production times: the fast heat-up phase takes about three seconds and, thus, is said to be up to 80% shorter than with other systems.