B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/10 (2006.01) B32B 27/34 (2006.01) B32B 29/00 (2006.01) B32B 37/30 (2006.01) B42D 15/00 (2006.01) D21H 21/42 (2006.01)
Patent
CA 2591982
Disclosed is a method for producing a multilayer substrate (60), e.g. as security paper, comprising at least one first paper layer (10), at least one second paper layer (20), and at least one plastic layer (80) that is located between the paper layers (10, 20, 202, 214), is connected to the paper layers (10, 20, 202, 214), and is made of a thermoplastic polymer material. In order to establish a connection between the different layers according to the inventive method, the plastic layer (80) is delivered between the paper layers (10, 20, 202, 214) in a fused state, and the paper layers (10, 20, 202, 214) are then pressed between a pair of rolls (50) in a continuous process such that a material bond is created between the paper layers (10, 20) and the plastic layer (80) while a penetration zone is embodied in which parts of the plastic layer (80) are connected to the mass of the fiber compound of the paper layers (10, 20, 202, 214). The plastic layer (80) is provided with a grammage of more than 20 g/m2 and a maximum of 100 g/m2.
L'invention concerne un procédé de fabrication d'un substrat multicouche (60) servant par exemple de papier de sécurité, comportant au moins une première couche de papier (10), au moins une deuxième couche de papier (20) et au moins une couche plastique (80) réalisée en matériau polymère thermoplastique, disposée entre les couches de papier (10, 20, 202, 214) et connectée à celles-ci. L'invention concerne également un procédé de connexion des diverses couches consistant à introduire la couche plastique à l'état fondu liquide entre les couches de papier (10, 20, 202, 214), et à comprimer les couches de papier (10, 20, 202, 214) entre une paire de rouleaux dans un processus continu, de manière à obtenir une connexion par liaison de matière entre les couches de papier (10, 20) et la couche plastique (80), avec formation d'une zone de pénétration dans laquelle des parties de la couche plastique (80) sont connectées à la masse du composite fibreux des couches de papier (10, 20, 202, 214), la couche plastique (80) présentant un grammage compris entre 20 et 100 g/m2.
Grob Jakob
Kocher Christoph
Cassan Maclean
Landqart
LandOfFree
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