METHOD FOR RECYCLING WASTE PAPER CONTAINING PLANT-BASED FIBRES AND AT LEAST PARTIALLY COATED WITH A WET-STRENGTHENING MATERIAL, AND PACKAGING MATERIAL PRODUCED USING THE METHOD

The object of the invention is a method for recycling waste paper containing plant-based fibres at least partially coated with a wet-strengthening material. The characteristic feature of the invention is that the waste paper (H) is conveyed to a wetting vessel (1) and there, by adding a liquid (F), a maximum 5 mass% waste paper- liquid base suspension (AS) is formed, then the base suspension (AS) is transported into the reaction chamber (2a) of a cavitation grinding device (2), and there the coated fibres are at least partially subjected to a physical and chemical release treatment originating from the cavitation effect created by the cavitation grinding device (2), and so a treated suspension (KS) containing released fibres is produced, following this the treated suspension (KS) containing the released fibres is conveyed to the work space (3 a) of a diluting bath (3), and there, by adding further liquid (F) a diluted suspension (HS) is created that contains 0.5 to 1.2 mass% released fibres, subsequently the diluted suspension (HS) is transported to a paper industry forming device (4) known of in itself, and there a semi-finished product for the production of packaging material or packaging material is created. The object of the invention is a packaging material made from recyclable waste paper which contains at least 10 mass% of a component made from waste paper containing plant- based fibres that are at least partially coated with a wet-strengthening substance, and made by the present method. L'invention concerne un procédé pour recycler des déchets de papier contenant des fibres à base de plantes au moins partiellement revêtus d'un matériau de renfort humide. La caractéristique de l'invention est que les déchets de papier (H) sont transportés vers un récipient de mouillage (1), et que, dans celui-ci, par l'ajout d'un liquide (F), une suspension de base liquide-déchets de papier sous 5 % en masse au maximum (AS) est formée, après quoi la suspension de base (AS) est transportée dans la chambre de réaction (2a) d'un dispositif de broyage par cavitation (2), et que, dans celui-ci, les fibres revêtues sont au moins partiellement soumises à un traitement de libération physique et chimique à partir de l'effet de cavitation créé par le dispositif de broyage par cavitation (2), et que, par conséquent, une suspension traitée (KS) contenant les fibres libérées est produite, après quoi la suspension traitée (KS) contenant les fibres libérées est transportée vers l'