A study of the ferromagnetic microwires retention in cellulose matrix in the security papers

A study of the ferromagnetic microwires retention in cellulose matrix in the security papers

Mirela Maria CODESCU, Wilhelm KAPPEL, Eugen MANTA, Eros PATROI, Delia PATROI, Remus ERDEI, Valentin MIDONI, Ion ZĂPODEANU, Marilena BURLACU

Abstract. Prepared by the Taylor – Ulitovsky technique, the glass-coated microwires are formed from a metallic core, with the diameter 3 to 50 μm, surrounded by an insulating layer from glass, with the thickness of 1 to 20 μm. Embedded in the cellulose matrix, the ferromagnetic glass-coated microwires allow their use as security element for the authentication of valuable papers in the electronic validation process. The authentication of the security paper is realised with a special detector, by “YES” or “NO” answer. This paper can be used as anti-shoplifting or validating elements to identify the counterfeit products. The paper presents the experimental results related to the retention of ferromagnetic microwires in the cellulose matrix, a complex process characterised by specific features, primarily due to the shape and diameter/length ratio of the microwires. The ferromagnetic retention yield was η = 65 – 90%, for the prepared papers with basis weight more than 50 g/m2.

Keywords
Security papers, Ferromagnetic microwires, Retention, Cellulose matrix

Published online 11/5/2018, 10 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Mirela Maria CODESCU, Wilhelm KAPPEL, Eugen MANTA, Eros PATROI, Delia PATROI, Remus ERDEI, Valentin MIDONI, Ion ZĂPODEANU, Marilena BURLACU, ‘A study of the ferromagnetic microwires retention in cellulose matrix in the security papers’, Materials Research Proceedings, Vol. 8, pp 1-10, 2018

DOI: https://dx.doi.org/10.21741/9781945291999-1

The article was published as article 1 of the book Powder Metallurgy and Advanced Materials

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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