Method of separating colouring agents, particularly printing...

Details Method of separating colouring agents, particularly printing... Method of separating colouring agents, particularly printing...

D - Textiles, Paper

21

B

D21B 1/32 (2006.01) D21D 1/34 (2006.01)

Patent

CA 2462813

The invention relates to a method of separating colouring agents, particularly printing ink, from recycled fibre material, in which method the recycled fibre material is defibered using a liquid, so that colouring agent is separated from the recycled fibre during the defibration. In the method, the pre-kneaded recycled fibre is applied to a double-action impact mill, where it is subjected to successive impacts, so that the treatment time is at most some seconds.

L'invention porte sur un procédé de séparation d'agents colorants, notamment d'une encre d'imprimerie, d'un matériau fibreux recyclé. Selon ce procédé, on défibre le matériau fibreux recyclé au moyen d'un liquide de sorte que l'agent colorant soit séparé de la fibre recyclée pendant le défibrage. Puis, on applique la fibre recyclée ayant subi au préalable un pétrissage sur un broyeur à percussion à double action où elle est soumise à des chocs successifs, le traitement ne devant pas durer plus de quelques secondes.

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