Application of synthetic calcium carbonate as high paper filler and preparation method of high paper filler

Abstract

The synthetic calcium carbonate, as the application of papermaking filler, belongs to the papermaking technical field. The plant pulp fiber material is as the skeleton, synthetic calcium silicate power is as the filler, and the high paper filler is produced by paper-making technics. The synthetic calcium silicate power is as the hydrated calcium aluminate, and the object composition includes C-S-H polymer gel and tobermorite, and the brightness of synthetic calcium silicate power is greater than or equal to 90%, the specific surface area is greater or equal to 120 square meters per gram, the bulk density is from 0.12 grams per centimeter to 0.30 grams per centimeter, the oil-absorbed value is 120-200 milliliters per milligram, and the average grain diameter is (D50) from 12 microns to 40 microns . Meanwhile, the invention also discloses the preparation method of synthetic calcium carbonate: the synthetic calcium silicate power is the paper filler, then under the premise that paper properties are guaranteed, the usage of plant fiber can be decreased at the greatest extent. Replacing the traditional paper filler by synthetic calcium silicate power can not only reduce the usage of plant filler at the greatest extent, but also increase the retention rate of calcium carbonate, decrease the waste of filler and improve the paper ash content.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and relates to papermaking fillers and high-filler papers, in particular to the application of synthetic calcium silicate as papermaking fillers and a papermaking method for high-filler papers. 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 10%-25% of calcium carbonate or calcium carbonate is added to the plant fiber through the flow delivery system. 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 performance, and has played an indispensable role in the development of human culture and spiritual civilization and the continuation of history. The use of fillers in the paper industry is to achieve th...

AI Technical Summary

Problems solved by technology

Although this method solves the shortcomings of traditional fillers with high density and fast settling speed, the mixing time of fillers and fibers is too short, which is not conducive to the full physical filling of fillers in fibers. A large amount of fillers are gathered on the surface, causing the phenomenon of "powder falling" on the paper surface

[0006] 3. At present, conventional fillers used in the papermaking field generally have a relatively high density. Even if a relatively high filler filling ratio is satisfied in the process, the thickness of fixed quantitative paper will be affected by the addition of a large amount of fillers, so that it cannot meet the index of paper Requirements, so in the case of paper thickness requirements, it is impossible to add too much traditional filler

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