Formula and preparation method of composite papermaking pre-flocculant

Abstract

The invention provides a formula and a preparation method of a composite papermaking pre-pre-flocculant. The composite papermaking pre-flocculant comprises the following components in parts by mass: 8-15 parts of water; 4-5 parts of epichlorohydrin; 2-3 parts of ethidene diamine; 2-3 parts of hexadecyl dimethyl amine; and 0.2-0.5 parts of a cross-linking agent. The preparation method of the composite papermaking pre-flocculant comprises the following steps of: selecting raw materials in parts by mass for later use; adding the water, the hexadecyl dimethyl amine, the ethylene diamine and the cross-linking agent in parts by mass into a reaction kettle, and mixing and stirring well; and slowly adding the epichlorohydrin in parts by mass into the reaction kettle, heating to 65-70 DEG C, and keeping the constant temperature for 4.5-5 hours. The flocculant prepared by combining the formula of the composite papermaking pre-flocculant with the method is alkaline, is adjusted to be neutral by adding acid before use, is convenient to use, has a good pre-flocculation effect, can achieve an expected flocculation effect with a small amount, and has an excellent and stable flocculation effect.

Description

technical field [0001] The invention belongs to the technical field of preflocculation agent production, and in particular relates to a formula and a preparation method of a composite papermaking preflocculation agent. Background technique [0002] Increasing filler content in printing and writing papers is crucial to improving product quality and reducing raw material and energy costs. However, the replacement of cellulosic fibers with fillers like calcium carbonate and clay reduces the strength of the formed sheet. Another problem that arises when increasing the filler content is the increased difficulty of uniformly distributing the filler throughout the three-dimensional paper structure. A way to reduce these negative effects of increased filler content is to pre-flocculate the fillers before they are added to the wet end system of the paper machine. [0003] The preparation process of the current pre-flocculant is cumbersome, the equipment cost is high, and the time p...

AI Technical Summary

Problems solved by technology

[0003] The preparation process of the current pre-flocculant is relatively cumbersome, the equipment cost is high, and the time period is long, which is not conducive to popularization and use, and the flocculation capacity of the current flocculant still needs to be improved

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