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Securing element with ferromagnetic microwires

M. M. CODESCU1,* , E. MANTA1, E. A. PATROI1, W. KAPPEL1, I. ZĂPODEANU2, M. BURLACU2, P. NECHITA2, V. MIDONI3

Affiliation

  1. R&D National Institute for Electrical Engineering ICPE-CA, Advanced Materials Dept., 313 Splaiul Unirii, Bucharest-3, Romania
  2. SC CEPROHART SA 3 “Al. I. Cuza” Blvd., Braila, Romania
  3. SC MEDAPTEH SRL Bacau, Romania

Abstract

The securing elements presented in the paper are constituted from composite materials, realized by the embedding of the glass-coated ferromagnetic microwires (MW) in a celullosic matrix. These can be used as validating elements in order to identifying the counterfeit products. The advantages of the MW securing were: the possibility of the identifying at distance, stable magnetic properties, even at high temperatures and corrosive media; stability at the mechanical action, small sizes and low consumption. A detector, specially designed, validates the presence of the ferromagnetic MW into the paper. Their metallic core, prepared from soft magnetic alloys, and their sizes, compatible with the sizes of the cellulosic fibers, even they are in the matrix randomly oriented disposed, recommend them as perfect filler for securing elements based on paper.

Keywords

Ferromagnetic, Microwires, Securing element.

Citation

M. M. CODESCU, E. MANTA, E. A. PATROI, W. KAPPEL, I. ZĂPODEANU, M. BURLACU, P. NECHITA, V. MIDONI, Securing element with ferromagnetic microwires, Optoelectronics and Advanced Materials - Rapid Communications, 4, 9, September 2010, pp.1361-1365 (2010).

Submitted at: July 27, 2010

Accepted at: Sept. 15, 2010