Manufacture of paper

Details Manufacture of paper Manufacture of paper

D - Textiles, Paper

21

H

D21H 23/14 (2006.01) D21H 17/28 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2340641

A process for making paper on a paper-making machine comprising providing a cellulosic thin stock-suspension, flocculating the suspension by adding an aqueous solution of a polymeric retension aid selected from natural and synthetic polymer and thereby forming a flocculated suspension, shearing the flocculated suspension, reflocculating the sheared suspension by adding an aqueous reflocculating suspension, draining the reflocculated suspension through a wire to form a sheet, and drying the sheet, characterised in that substantially fully cooked starch is added to the suspension after the shearing and before the draining.

L'invention porte sur un procédé de fabrication de papier sur une machine à papier consistant à: (a) obtenir une suspension de pâte mince cellulosique; (b) floculer la suspension par adjonction d'une solution aqueuse d'un additif polymérique de rétention choisi entre des polymères naturels et de synthèse, de manière à former une suspension floculée; (c) cisailler la suspension floculée; (d) refloculer la suspension cisaillée par adjonction d'une suspension aqueuse de refloculation; (e) égoutter la suspension refloculée sur une toile pour former une feuille; (f) faire sécher la feuille. Le procédé se caractérise par l'adjonction d'amidon presque entièrement cuite à la suspension après le cisaillement et avant l'égouttage.

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