Adhesion Strength Of Aluminum On Metallized Plastic Films Used In Flexible Packages - Development And Validation Of A Test Procedure [determinação Da Força De Adesão Da Metalização Com Alumínio Em Filmes Plásticos Utilizados Em Embalagens Flexíveisl - Desenvolvimento E Validação De Metodologia]

OPP and OPET metallized films are widely used as substrates in multilayer packages, since they bring together good mechanical properties and barrier to gases and water vapor, which are damaged with delamination of the film layers, together with the visual appearance and package integrity. One of the main factors that affect the package delamination is the adhesion strength of aluminum layer to the polymeric substrate, a parameter for which there is no standard procedure to quantify. The aim of this work was to establish and validate a procedure to determine the adhesion strength of the aluminum to the polymer. This test procedure was carried out using experimental design with fixed and variables parameters with two levels for each variable. The test procedure was stable, robust and replicable. It consisted basically of the heat sealing of a plastic film to the metallized sample surface, under specific temperature/time/pressure conditions and the measuring of adhesion strength of metallization in a universal test machine running at specific angle and speed.213233239Mueller, K., Weisser, H., (2002) Pack. Tech. Sci., 15, p. 29. , http://dx.doi.org/10.1002/pts.563(2008) ASTM F 904-98 - Standard Test Method for Comparison of Bond Strength or Ply Adhesion of Similar Laminates Made from Flexible Materials, , American Society for Testing and Materials - ASTM, ASTM, PhiladelphiaBiron, M., Enhancing polymer adhesion thanks to funcionalized materials and surface treatments (2008) Polymer Additives & colors, , http://www.specialchem4.polymers.com, Disponível emHernandez, R., Selk, S.E.M., Culter, J.H.D., (2000) Plastics Packaging - Properties, Processing, Applications and Regulations, , Hanser, MunichLoewy, M., (2005) Como se Rompen Los Laminados?, , http://www.envapack.com, Bogota, Disponível emOlafsson, G., Hildingsson, I., (1995) J. Agric. Food Chem., 43, p. 306. , http://dx.doi.org/10.1021/jf00050a008Bichler, C., Mayer, K., Langowski, H.C., Moosheimer, U., Influence of polymer film surfaces on adhesion and permeation properties of vacuum web coated high barrier films and laminates: Results of a cooperative research project (1998) Proceedings of 41st Annual Technical Conference, p. 349. , PhiladelphiaMoosheimer, U., Melzer, A., Langowski, H.C., European thematic network vacuum coating of polymers films for packaging and technical applications (2001) Proceedings of 44th Annual Technical Conference, p. 458. , PhiladelphiaBichler, C., Bischoff, H.C., Langowski, H.C., Moosheimer, U., The substrate-process interface in barrier film coating (1996) Proceedings of 39th Annual Technical Conference, p. 378. , TucsonSilvain, J.F., Ehrhardt, J.J., Picco, A., Lutgen, P., Crystallographic structure and adhesion of aluminum thin films deposited on mylar (1990) Metallization of Polymers, , http://dx.doi.org/10.1021/bk-1990-0440.ch033, cap.33, Sacher E.Pireaux J. J. & Kowalczyk, S. P. (ed.), American Chemical Society, WashingtonMetallizing Technical Reference - Tp-105-92, , Association of Industrial Metallizers, Coaters and Laminators, 3. ed. South Carolina, AIMCAL(1999) Test Procedure Metal Adhesion Seal Test, , European Metallizers Association, EMA(2009) NBR ISO 15988 - Plásticos - Filme e Revestimento - Filme de Poli(Tereftalato de Etileno) (PET) Biorientado, , Associação Brasileira de Normas Técnicas - ABNT, ABNT, Rio de Janeiro(2009) NBR ISO 17555 - Plásticos - Filme e Revestimento - Filme de Polipropileno (PP) Biorientado, , Associação Brasileira de Normas Técnicas - ABNT, ABNT, Rio de JaneiroLeão, D., (2009) Planejamento de Experimentos, , Estatcamp, CampinasBarros, C.B., (2008) Validação de Métodos Analíticos" Metrologia em Química, , Módulo 2. São Paul