The deposit build-up to be removed from the inside of the container consists of hardened paint residues, sometimes with several layers of residue on top of each other. They were removed in a semi-automated cleaning system using the solvent butyl acetate in a recycling procedure with brush cleaning. The resulting exhaust air was filtered off and solvent components were thoroughly removed by means of afterburning. Part of the butyl acetate used for cleaning was recovered by distillation and then disposed of.
The cost drivers were unequivocally identified as the exhaust air systems and associated explosion protection measures. Thus, Caramba recommended switching to a water-based cleaning agent which has already achieved excellent results in the printing industry. The first laboratory tests were carried out at a temperature of 40°C. The same cleaning results were obtained on the dissolution system at 60°C using an aqueous solution of cleaning agent diluted 1:1, as with butyl acetate.
Switching to Caramba Raster Clean as cleaning agent meant it was no longer necessary to use aromatic and aliphatic solvents for container cleaning. But this did not just result in a significant reduction in occupational health risks and environmental pollution. Changing to a water-based cleaning agent also yielded a 17.5% reduction in the annual cost of processing IBC containers.
» Caramba Raster Clean:
» Decreases the risk to employee health
» Minimises the risk of explosion and fire
» Lowers the costs of safety measures
» Minimises odour levels during use