LOSS OF THE INTEGRITY IN BEER ALUMINIUM CANS

Canned beer samples obtained from Romania factories were analyzed for the double sealed parameters like body hook and seam gap. Sampling location was Bucharest (Romania). Deviant variation from standard was found in 12 from 18 samples analyzed. Also several measurements showed how standard cans look like and were compared with the other ones. The results of previous studies showed that the defective values of double seam may conduct to leakage of liquids or vapors into or out of the can or to the bacteria contaminations. The double seam, then, is an interlocked metal-tometal joint that provides the hermetic seal. The small voids that naturally occur in this metal-to-metal joint are filled by the sealing compound when it is under proper compression (seam tightness). The experiments revealed that voids can become larger and more apt to cause leakage through the double seams when these common conditions exist.