Delamination of polyethylene and aluminum foil layers of laminated packaging material by acetic acid
1993
Olafsson, G. | Jagerstad, M. | Oste, R. | Wesslen, B.
Acetic acid solutions (0.5, 1.0 and 3.0%) were packed in polyethylene aluminum foil laminated material and adhesion between the layers was measured during 28-days storage at room temperature (approximately-23 degrees C). Peel tests showed that in 3% acetic acid adhesion between layers was almost totally lacking after 4 days. After another 3 days the adhesion started to recover, and after 14 days it had returned to 50% of the initial value. Attenuated total reflection (ATR) tests after separation of the layers demonstrated that a salt layer was formed at the PE-Al interface. Electron scanning for chemical analysis tests showed the presence of a thick oxidized layer on the aluminum foil and a trace of aluminum on the PE film.
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