Madico introduces void security substrate for low surface energy applications

Madico Graphic Films, a UK-based supplier of specialist pressure sensitive film products for durable label applications, has introduced a void security film that offers instant tamper-indicating qualities, even when applied to UV lacquered or low surface energy plastics such as polypropylene and polyethylene. Once applied, the new material reveals a clear, non-reversible void message, making it suitable to a host of industrial security marking applications.

Designed for conventional and high-resolution 600dpi thermal transfer printing, Madico’s 50 micron, metallized, matt-silver, polyester film is said to offer label converters a number of important benefits including an extremely compact void message that allows the complete text to be displayed and ensures suitability with the smallest label sizes. In addition, Madico’s new offering upholds label integrity by ensuring instant and solid adhesion.

Madico’s security film works by combining the correct level of adhesive strength for the application surface with the required release performance of the void message.
 
‘Typically, most void security labels on the market will perform to expectations if applied to a surface such as glass, but more difficult materials with lower surface energies reduce the performance capability of the void face film and adhesive combination,’ explained Gary Flavell, Madico’s technical manager.    

‘Unfortunately, a number of void security labels are formulated with a void release coating that has too tight a release in combination with an inferior adhesive,’ he added. ‘In such cases, applying a high performance adhesive will not ensure that the void text is removed from the polyester face film. Instead, if the release lacquer remains bonded to the film, the void message will not break from the polyester and the label would simply peel off as one and defeat the object of providing evidence of tampering.’

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