Production process for filled paper and filled paper

Abstract

The invention relates to a production process for filled paper. The production process comprises the following steps: mixing a papermaking filling material, cationic starch and a cationic starch cross-linking agent so as to prepare a mixed liquor system; adjusting the temperature of the mixed liquor system to allow the cationic starch to be gelatinzed and cross-linked so as to realize wrapping of a filling material particle; mixing the mixed liquor system in which wrapping of the filling material particle is finished with a pulp fiber so as to prepare paper pulp; and subjecting the paper pulp to paper making so as to obtain finished paper. The invention also relates to the filled paper produced by using the production process. Compared with the prior art, the production process for the filled paper provided by the invention has the following advantages: influence of the filling material on paper strength can be overcome, and more filling materials can be added to replace the pulp fiber. The filled paper produced by using the production process has the advantages of low cost and high strength.

Description

technical field [0001] The invention relates to a production process of filling paper and filling paper. Background technique [0002] In the paper industry, in order to save pulp and reduce costs, the usual method is to add fillers to paper, which can not only save pulp and reduce costs, but also improve the performance of paper. Filled paper is collectively referred to as filled paper. [0003] For most paper grades, filler has become an important component of paper. Currently commonly used fillers include talcum powder, titanium dioxide, kaolin, calcium carbonate, mineral fiber, etc., but these fillers will have the following problems after they are added to the paper: On the one hand, when the filler is added to the pulp, due to its own physical properties, the filler Not only can it not form an effective bond with the paper-making fibers, but it will also destroy the bonding force between the paper-making fibers, resulting in the strength of the paper made by papermak...

AI Technical Summary

Problems solved by technology

Currently commonly used fillers include talcum powder, titanium dioxide, kaolin, calcium carbonate, mineral fiber, etc., but these fillers will have the following problems after they are added to the paper: On the one hand, when the filler is added to the pulp, due to its own physical properties, the filler Not only can it not form an effective bond with the paper-making fibers, but it will also destroy the bonding force between the paper-making fibers, resulting in the strength of the paper made by papermaking is lower than that of paper made without fillers; on the other hand, papermaking The particle size of the filler particles is very small, generally the average particle size is only a few microns, and because the bonding force between the filler and the paper-making fibers is very poor, the filler easily passes through the forming wire and is lost with the white water during the papermaking process. , resulting in a low retention rate of fillers in the paper, which not only fails to achieve the purpose of adding fillers, but also leaves a large amount of fillers in the white water system, which will also have a negative impact on the overall wet end

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