Multilayer structure containing cavitated materials for use...

Details Multilayer structure containing cavitated materials for use... Multilayer structure containing cavitated materials for use...

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) B42D 15/00 (2006.01)

Patent

CA 2369748

A laminated multilayer film substrate for use in the production of banknotes having an oriented polypropylene core layer and at least one high density polyethylene layer on each side of the oriented polypropylene layer. The core layer contains microcavities formed by the addition of a cavitating agent. The resultant films exhibit good embossability, dead-fold characteristics and other properties, making them highly suited for the production of banknotes and other security documents.

L'invention concerne un substrat constitué d'un film multicouche stratifié destiné à être utilisé dans la production de billets de banque. Ce substrat se compose d'une couche centrale de polypropylène orienté et d'au moins une couche de polyéthylène haute densité disposées de part et d'autre de la couche de polypropylène orienté. La couche centrale renferme des microcavités formées par addition d'un agent de cavitation. Les films obtenus présentent une emboutissabilité, une permanence de la marque du pli et autres propriétés satisfaisantes, ce qui les rend tout à fait appropriés pour la production de billets de banques et autres documents de sécurité.

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