Method for preparing paper-based material from biochemical technology ECF bleached sulfate pulp of fast-growing poplar

Abstract

The invention discloses a method for preparing a paper-based material from a biochemical technology ECF bleached sulfate pulp of fast-growing poplar. The method comprises the following steps: 1, preparing a paper pulp through a biochemical technology ECF bleaching technology of sulfate pulp of the fast-growing poplar; and 2, carrying out gradient beating on the prepared paper pulp to obtain paper pulp with three beating degrees, wherein the beating degree of first paper pulp is 10-30 DEG SR, the beating degree of second paper pulp is 30-55 DEG SR, and the beating degree of third paper pulp is 55-70 DEG SR; and 3, carrying out making molding or compaction molding on the mixed pulp to obtain the paper-based material. The method adopting a gradient beating technology and a self-adding technology solves the disadvantages of single beating technologies in the prior art, and avoids use of extra additives, and the produced paper-based material has the advantages of high folding strength, high bursting strength and high tearing resistance index, is suitable for producing various types of paper bases, and is especially for producing white cardboard raw paper-based materials.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a method for preparing paper-based materials from ECF bleached sulfate pulp of fast-growing poplar. Background technique [0002] Since 2012, the total output of paper and cardboard in my country has exceeded a quarter of the global output, ranking first in the world. With the rapid development of my country's paper industry, wood biomass has become the main raw material of my country's pulp and paper industry, accounting for about 60% of paper fiber raw materials. With the continuous improvement of the production technology level of the pulp and paper industry, the proportion of hardwood in pulp and paper is increasing. At present, the large-scale fast-growing poplar forests in northern my country have begun to take shape, which has reserved good raw materials for the development of the pulp and paper industry. With the development of society and science and te...

AI Technical Summary

Problems solved by technology

However, after adding fillers, the sizing thickness, stiffness and strength of the paper will all decrease, especially for paper that has been overpressed, and the decline is even greater.

In addition, paper with fillers is prone to dusting and hair loss, and these shortcomings need to be compensated by strengthening agents and surface sizing

However, the addition of a large number of chemicals makes the finished paper contain chemicals, and there are potential safety hazards in the use of some paper. The addition of some chemicals makes the paper not easy to degrade, which will cause certain harm to the environment.

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