Production process of high-strength environment-friendly liner cardboard paper

Abstract

The invention belongs to the technical field of cardboard paper, and provides a production process of high-strength environment-friendly liner cardboard paper, which comprises the following steps: taking domestic bamboo fiber pulp, imported wet paper pulp, imported roll paper and national waste as raw materials according to a specific ratio; the wet paper pulp and the bamboo fiber pulp are mixed and pulped through a medium-concentration pulper, a sand remover, a pre-grinding pool, a disc mill and a post-grinding pool in sequence, and first mixed pulp is obtained; in the OCC pulping line, the cut roll paper and national waste are treated through an OCC pulper, a high-concentration sand remover, a discharging tower, a two-section coarse screen and a classifying screen in sequence to obtain long fibers and short fibers, and then the long fibers and the short fibers are subjected to aftertreatment to obtain long fiber pulp and short fiber pulp; and mixing the long fiber pulp, the short fiber pulp and the first mixed pulp, and performing papermaking to obtain the liner cardboard paper. According to the production process, national waste is mainly used, quantitative roll paper, wet paper pulp and bamboo fiber pulp are matched, and the production process is optimized, so that the cost is reduced, the production efficiency is improved, the quality of finished paper can be improved, and the problem that external waste import is limited is solved.

Description

technical field [0001] The invention relates to the technical field of container board paper, in particular to a production process of high-strength and environment-friendly liner board paper. Background technique [0002] With the restrictions on the import of foreign waste, many paper-making enterprises are facing the problem of shortage of raw materials. In recent years, great progress has been made in the recycling of waste paper in China, and the use of national waste is also increasing; for example, a printing surface layer container board production process method disclosed in the publication number CN105316977A, which uses 60-95% Import OCC waste paper pulp and 5-40% domestic OCC waste paper pulp as OCC container board waste paper pulp to make container board. [0003] However, the quantity and quality of recycled national waste are uneven. The national waste contains a lot of impurities, the recycling rate is high, and the fibers are fine. The paper has low bursti...

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Problems solved by technology

[0003] However, the quantity and quality of recycled national waste are uneven. The national waste contains a lot of impurities, the recycling rate is high, and the fibers are fine. The paper has low bursting strength, short fibers, poor bonding between layers, the physical index of the paper has dropped significantly, and the waste paper yield is low, which seriously affects the paper web forming and paper quality in the process of papermaking. Moreover, the consumption of paper production The amount of auxiliary material chemicals used is large and the cost per ton of paper is high; therefore, in order to ensure paper quality and production cost, as disclosed in CN105316977A, in a kind of printing surface layer container board production process method, the national waste is in the OCC container board waste paper pulp The proportion of raw materials does not exceed 40%, which still relies heavily on imported waste, which severely limits the production capacity of container board

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