Method for producing cardboard paper by using waste paper pulp

Abstract

The invention discloses a method for producing cardboard paper by utilizing waste paper pulp. The method comprises the following steps: step 1, treating national waste paper; step 2, treating American waste slurry; step 3, mixing long fibers, short fibers and batter graded in the step 1 and the step 2; and step 4, mixing mixed surface pulp, prime paper pulp and core pulp to manufacture cardboard paper. According to the method, the fibers in the national waste pulp and the American waste pulp are subjected to fiber grading, the method is high in fiber grading rate, the fiber quality can be effectively improved, the requirements of production indexes are met, and the cardboard paper prepared by mixing the fibers is good in quality, so that the problem that the national waste fibers are poor in quality is solved.

Description

technical field [0001] The invention relates to the technical field of boxboard paper preparation, in particular to a method for producing boxboard paper by utilizing waste paper pulp. Background technique [0002] In recent years, with the stricter environmental protection requirements, the import of foreign waste raw materials has been restricted, resulting in a shortage of domestic waste raw materials. In order to cope with the shortage of raw materials, various paper companies have begun to seek new raw materials to replace waste paper raw materials; in actual production High-grade container board is the most widely used and the important raw materials 12# and 13# American waste are gone, and the domestic waste raw material fiber quality is not high; [0003] Therefore, the existing technology is either to add wood pulp to produce with national waste, which will not only increase the cost a lot, but also add too much wood pulp will affect production; there is another exi...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the existing technology is either to add wood pulp to produce with national waste, which will not only increase the cost a lot, but also add too much wood pulp will affect production; there is another existing technology that uses American waste pulp to match national waste production , U.S. waste pulp is a kind of pulp. This kind of pulp is used to replace the lost U.S. waste paper. Although the fiber quality of this U.S. waste pulp is higher than that of national waste, ordinary purification and screening still cannot meet the requirements of medium and high grades. Requirements for containerboard production indicators

Images