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METHOD FOR MAKING OF PAPER, TISSUE, BOARD OR THE LIKE

  • US 20150041092A1
  • Filed: 02/22/2013
  • Published: 02/12/2015
  • Est. Priority Date: 02/22/2012
  • Status: Active Grant
First Claim
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1. Method for making of paper, tissue, board or the like by using recycled fibre material as a raw material, the method comprising following steps:

  • pulping recycled paper, board or the like in a pulper and obtaining a pulp flow comprising (i) an aqueous phase and (ii) at least recycled fibres and starch having low molecular weight, which are dispersed in the aqueous phase;

    characterised inadding a coagulant agent to the pulp flow or to an aqueous process flow comprising starch having low molecular weight;

    allowing the coagulant agent to interact with the starch having low molecular weight and optionally forming aggregates; and

    adding at least one flocculating agent, after the addition of the coagulant agent, to any flow, which comprises interacted coagulant agent, and forming a treated flow with starch comprising agglomerate(s);

    retaining at least part of the said aggregates and/or the said agglomerates to the fibres or to a web, which is formed.

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