A process for improving paper strength

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 23/14 (2006.01) D21H 17/37 (2006.01) D21H 21/18 (2006.01) D21H 21/20 (2006.01)

Patent

CA 2667432

The present invention provides a process for preparing a paper or paper board of improved strength which comprises the steps of i) providing a cellulosic thick stock, ii) diluting the thick stock of step i) to form a thin stock, iii) draining the thin stock of step ii) on a wire to form a web, and iv) drying the web of step iii) to form paper or paper board, wherein the cellulosic thick stock of step (i) comprises organic polymeric microparticles, as well as paper obtainable by above process.

La présente invention porte sur un procédé pour préparer du papier ou du carton d'une résistance améliorée. Ce procédé comprend les étapes consistant à i) se procurer une pâte à papier épaisse cellulosique, ii) diluer la pâte à papier épaisse de l'étape i) de manière à former une pâte à papier diluée, iii) drainer la pâte à papier diluée de l'étape ii) sur une toile afin de former une bande, et iv) sécher la bande de l'étape iii) de façon à former du papier ou du carton, la pâte à papier épaisse cellulosique de l'étape i) comprenant des microparticules polymères organiques. L'invention porte également sur du papier pouvant être obtenu par le procédé ci-dessus.

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