High-filler paper and production method thereof

Abstract

The invention discloses high-filler paper and a production method thereof. The high-filler paper contains 30 to 60 mass percent of filler, and the filler is active calcium silicate; in the step of adding the filler, after the active calcium silicate in an amount which is 40 to 70 percent of the total mass of the active calcium silicate and the pulp is fully stirred and dissolved to form emulsion,the emulsion is guided into a covered pulp storage tank or a pre-making pulp storage tank and fully stirred and mixed with plant fibers; the filler adding proportion of the high-filler paper is improved, so that the consumption of the plant fibers is greatly reduced at the same time of improving the performance of the paper; and according to the production method for the high-filler paper, the adding process of the papermaking filler is simplified, the filler and the plant fibers can be fully mixed uniformly, and the internal bonding force is increased, so that the performance of the paper isimproved.

Description

technical field [0001] The invention belongs to the technical field of papermaking production technology, and in particular relates to a high-filler paper and a production method thereof. Background technique [0002] At present, in the field of conventional paper production, taking cultural paper as an example, a large amount of plant fiber pulp is used as the paper skeleton, and about 7% to 20% of calcium carbonate or calcium carbonate is added to the plant fiber through the high-level box of the paper machine. Traditional mineral fillers such as talcum powder and a small amount of chemical additives complete papermaking. This kind of paper has high printing performance, writing performance and other performances, and has played an indispensable role in the development of human culture and the inheritance of civilization. [0003] The use of fillers in the paper industry is to improve paper uniformity, opacity and reduce costs. The raw materials are mainly inorganic mine...

AI Technical Summary

Problems solved by technology

[0005] 1. The density of the filler itself is quite different from that of the fiber. If it is mixed with plant fibers in the pulp tank, it will quickly settle to the bottom of the tank and cannot be mixed with the fibers evenly. During the transfer process, because it sinks to the bottom and cannot be transferred, the utilization rate of the filler is low and the ash content of the paper is low;

[0006] 2. In the prior art, the filler is stored in the high-level box equipment of the paper machine, and is quickly added to the pulp before the pulp is online for papermaking, and then enters the headbox, and quickly mixes with the fiber in the headbox. Through this The method prevents the filler from settling and does not delaminate with the pulp; although this method solves the shortcomings of the traditional filler with high density and fast sedimentation speed, the mixing time between the filler and the fiber is too short, which is not conducive to the sufficient physical filling of the filler in the fiber, and also causes The low retention rate of traditional fillers and the accumulation of a large amount of fillers on the finished paper surface cause the phenomenon of "powder falling" on the paper surface;

[0007] 3. At present, conventional fillers used in the papermaking field generally have a relatively high density. Even if a relatively high filler addition ratio is satisfied in the process, the addition of a large amount of fillers will affect the thickness of the fixed quantitative paper, so that it cannot meet the index requirements of the paper. , so it is impossible to add too much traditional filler when the thickness of the paper is required