Method in connection with the production of mechanical pulp

Details Method in connection with the production of mechanical pulp Method in connection with the production of mechanical pulp

D - Textiles, Paper

21

B

D21B 1/04 (2006.01) D21B 1/12 (2006.01) D21C 9/16 (2006.01) D21J 1/16 (2006.01)

Patent

CA 2384461

A method in connection with the production of mechanical pulp from a cellulose containing material, wherein the material is processed in at least one refining step to produce pulp. According to the invention, the pulp is fractionated (4), after a first refining step (1), in order to separate primary fines (5) from the pulp. The invention also relates to a mechanical pulp, produced by the method, and to a paperboard, which at least partly consists of such mechanical pulp.

L'invention concerne un procédé lié à la production de pâte mécanique à partir d'un matériau contenant de la cellulose, dans lequel le matériau est traité dans au moins une étape de raffinage pour produire de la pâte. Selon l'invention, la pâte est fractionnée (4), après une première étape de raffinage (1), afin de séparer les fines primaires (5) de la pâte. L'invention concerne également une pâte mécanique produite selon le procédé ainsi qu'un carton composé au moins partiellement de cette pâte mécanique.

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