Filler treatment process and papermaking process

Abstract

The invention relates to a filler treatment process. The filler treatment process comprises the following steps: introducing starch and filler particles into a gas flow; and introducing water vapor into the gas flow to enable the starch to absorb water, swell up, gelatinize and wrap the filler particles to form a starch-filler complex. The invention further relates to a papermaking process. According to the filler treatment process and the papermaking process, the starch can absorb water for moistening and gelatinize to wrap the filler particles in a process of flowing along with the gas flow by introducing the starch and the filler particles into a gas-water mixing system; through the way, the uniformity in mixing of the starch and the filler particles can be greatly improved, and the starch-filler complex with uniform particle size distribution can be further obtained.

Description

technical field [0001] The invention relates to a filler treatment process and a papermaking process. Background technique [0002] In the paper industry, in order to save pulp and reduce costs, the usual method is to add fillers to paper to replace some plant fibers, which can not only save pulp and reduce costs, but also improve the performance of paper . [0003] At present, the main way of adding fillers is to directly add them into the pulp at the wet end of papermaking. However, the following problems will occur after the fillers are added to the pulp: On the one hand, when the fillers are added into the pulp, due to their own physical characteristics, the filler itself is not only It cannot form an effective bond with the paper-making fibers, and it will also destroy the bonding force between the paper-making fibers, resulting in the strength of the paper that is made is lower than the strength of the paper that is made without adding fillers; on the other hand, the ...

AI Technical Summary

Problems solved by technology

[0003] At present, the main way of adding fillers is to directly add them into the pulp at the wet end of papermaking. However, the following problems will occur after the fillers are added to the pulp: On the one hand, when the fillers are added into the pulp, due to their own physical characteristics, the fillers themselves are not only It cannot form an effective bond with the paper-making fibers, and it will also destroy the bonding force between the paper-making fibers, resulting in the strength of the paper that is made is lower than the strength of the paper that is made without adding fillers; on the other hand, the paper-making filler particles The particle size is very small, generally the average particle size is only a few microns, and because the bonding force between the filler and the papermaking fiber is very poor, during the papermaking process, the filler is easy to pass through the forming wire and lose with the white water, resulting in The retention rate of fillers in the paper is not high, which not only fails to achieve the purpose of adding fillers, but also a large amount of fillers left in the white water system will also have a negative impact on the overall wet end