发明名称 |
METHOD FOR MAKING OF PAPER, TISSUE, BOARD OR THE LIKE |
摘要 |
The invention relates to a method for making of paper, tissue, board or the like by using recycled fibre material as a raw material. The method comprises 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; adding 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. |
申请公布号 |
US2015041092(A1) |
申请公布日期 |
2015.02.12 |
申请号 |
US201314380323 |
申请日期 |
2013.02.22 |
申请人 |
KEMIRA OYJ |
发明人 |
Hietaniemi Matti;Strengell Kimmo;Karppi Asko;Kolari Marko;Ekman Jaakko |
分类号 |
D21H17/66;D21H17/63;D21H17/55 |
主分类号 |
D21H17/66 |
代理机构 |
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代理人 |
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主权项 |
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 in
adding 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. |
地址 |
Helsinki FI |