Security paper

Details Security paper Security paper

D - Textiles, Paper

21

H

D21H 21/40 (2006.01) D21H 13/16 (2006.01) D21H 15/10 (2006.01)

Patent

CA 2242551

The invention relates to security paper and in particular to a method for the manufacture of security paper which is provided with high-quality watermarks. In particular such a method comprises forming a papermaking suspension comprising cellulosic fibres and polyvinyl alcohol fibres, which polyvinyl alcohol fibres are soluble in water at temperatures of from 95° to 100 °C, dewatering the papermaking suspension through an embossed wire mesh or other embossed means, wherein the embossing creates a profile of peaks and troughs corresponding to the light and dark areas of the watermark, and the formed paper after dewatering with the watermark feature is thereafter dried to provide the resulting security paper.

L'invention concerne un papier infalsifiable et, en particulier, un procédé pour fabriquer ce papier infalsifiable avec un filigrane de haute qualité. Plus précisément, ce procédé consiste à former une pâte à papier contenant des fibres cellulosiques et des fibres d'alcool polyvinylique, ces dernières étant solubles dans l'eau à des températures entre 95 DEG C et 100 DEG C, à égoutter la suspension de pâte à papier sur une toile métallique avec un relief ou un autre moyen de marquage, pour créer un motif de pics et de gorges correspondant à des régions claires et sombres du filigrane, et à sécher ensuite le papier égoutté portant un filigrane, pour obtenir le papier infalsifiable de l'invention

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