Method for preparing waste paper

Abstract

In order for a method for preparing fibres for producing paper from a fibre-containing material, in particular from waste paper, to be improved such that shortening of the fibres separated from the fibre material is reduced to a minimum, it is proposed that the fibre-containing material is supplied in a moist state for pulping and is pulped to a dry state by continuous impact action.

1 . A method for preparing and obtaining fibres for producing paper or similar from a fibre-containing material, the method including:
 supplying the fibre-containing material in a moist state; and   pulping the fibre-containing material to a dry state by continuous impact action.   
     
     
         2 . The method according to  claim 1 , wherein a consistency of the fibre-containing material is in the range of 40% to 99%. 
     
     
         3 . The method according to  claim 1 , further including injecting or spraying water, wherein humidity of the fibre-containing material, temperature, dust generation, or any combination of humidity, temperature, or dust generation, when the fibre-containing material is pulped is controlled by the injecting or spraying water. 
     
     
         4 . The method according to  claim 1 , wherein the pulping comprises using one or more flexible impact tools. 
     
     
         5 . The method according to  claim 4 , wherein the pulping takes place in a cross-flow shredder. 
     
     
         6 . The method according to  claim 1 , further including separating coarse debris and fine debris during or after the pulping. 
     
     
         7 . The method according to  claim 1 , further including swelling, after the pulping, in a swelling or agitation vat. 
     
     
         8 . The method according to  claim 1 , further including adding kraft paper to the fibre-containing material, wherein the pulping comprises pulping the kraft paper together with the fibre-containing material. 
     
     
         9 . A method of document destruction, comprising using the method according to  claim 1  for the document destruction. 
     
     
         10 . The method according to  claim 1 , wherein the fibre-containing material comprises waste paper. 
     
     
         11 . The method according to  claim 1 , wherein a consistency of the fibre-containing material is in the range of at least 50% to 95%. 
     
     
         12 . The method according to  claim 1 , wherein a consistency of the fibre-containing material is in the range of 85% to 95%.