Process for recycling iscrap paper containing at least partially coated plant-based fibers with a wet solidifying agent a packaging material produced by the process

摘要

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.