Green Technology for Surface Treatments of Aluminium Foil for Flexible Packaging

Abstract:

In the flexible food packaging industry, producers of laminated aluminium predominantly use a "rinse" technology for surface treatments characterized by very bulky machinery. The Laminazione Sottile Group togehther with the University of Naples Federico II and the gscsg have developed and characterized a new, extremely simplified, process that provides a "no rinse" treatment on aluminium alloy AA8079Y. In addition, this treatment is chromium free, because chromium has been replaced by zirconium salts. The characteristics of resistance have been verified by using Electrochemical Impedance Spectroscopy (EIS) and cathodic delamination tests. Results obtained show that the "no rinse" treatment with zirconium salts produces an effective protective effect.

• Periodical: Key Engineering Materials (Volume 710)
• Pages: 186-191
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.710.186
• Online since: September 2016
• Authors: Ciro Sinagra, Francesco Bravaccino, Ciro Bitondo*, Antonio Bossio, Tullio Monetta, Donald Bryce Mitton, Francesco Bellucci
• Keywords: AA8079Y, Chromium Free, Disbonding, EIS, Flexible Packaging, No Rinse Treatments

References

[1] CA Bishop, Roll-to-Roll Vacuum Deposition of Barrier Coatings, Scrivener Salem, (2010).

[2] The Future of Transparent Barrier Films to 2011, Pira International Ltd., Leatherhead, (2006).

[3] C. F Struller, P.J. Kelly, N.J. Copeland, V. Tobin, H. E Assender., C.W. Holliday, S.J. Read, Aluminium oxide barrier films on polymeric web and their conversion for packaging applications, Thin Solid Films, 553 (2014) 153–156.

DOI: 10.1016/j.tsf.2013.10.091

[4] A.P. Kharitonov, R. Taege, G. Ferrier, V.V. Teplyakov, D.A. Syrtsova, G. H Koops, Direct fluorination—useful tool to enhance commercial properties of polymer articles, J. Fluorine Chem. 126 (2005) 251–263.

DOI: 10.1016/j.jfluchem.2005.01.016

[5] A.P. Kharitonov, G.V. Simbirtseva, V.M. Bouznik, M.G. Chepezubov, M. Dubois, K. Guérin, A. Hamwi, H. Kharbache, F. Masin, Modification of ultra-high-molecular weight polyethylene by various fluorinating routes, J. Polym. Sci. A: Poly. Chem. 49 (2011).

DOI: 10.1002/pola.24793

[6] D. Hegemann, H. Brunner, C. Oehr, Plasma treatment of polymers for surface and adhesion improvement, Nuclear Instr. Methods Phys. Res. Sect. B: Beam Interactions Mater. Atoms 208 (2003) 281–286.

DOI: 10.1016/s0168-583x(03)00644-x

[7] M. Collaud Coen, R. Lehmann, P. Groening, L. Schlapbach, Modification of the micro and nanotopography of several polymers by plasma treatments, Appl. Surf. Sci. 207 (2003) 276–286.

DOI: 10.1016/s0169-4332(02)01503-9

[8] M. Formisano, A. Amitrano, M. Montuori, T. Monetta, F. Bellucci, T. Acconcia, A. Pennestri, C. Sinagra, Corrosion Behavior of Zirconium Salts Conversion Layer on Coated and Uncoated AA 5xxx, ASST 2012 Aluminium Surface Science & Technology, VI International Symposium, Sorrento Italy, May 27th-31st (2012).

[9] RP Summary: Recommended Practices for Selection and Use of Packaging Systems for Sterilization, AORN Journal, Volume 99, Issue 4, April 2014, Pages 506–508.

DOI: 10.1016/j.aorn.2014.01.016

[10] R. Berger, U. Bexell, T.M. Grehk, S. Hornstrom, A comparative study of the corrosion protective properties of chromium and chromium free passivation methods, Surface&Coatings Technology, 202-2 (2007) 391–397.

DOI: 10.1016/j.surfcoat.2007.06.001

[11] A. Amitrano, C. Salerno, C. Sinagra, Tecniche elettrochimiche per la valutazione della resistenza a corrosione di laminati in leghe di alluminio nude e rivestite, Verniciatura Industriale n. 534 (2012)10.

[12] A. Amitrano, C. Salerno, C. Sinagra, Electrochemical technologies for assessing the corrosion resistance of bare and coated aluminium alloy laminates, WSCA World Surface Coatings Abstract 86-847 (2013).