Method for preparing paper-based material by bleaching KP pulp through biochemical method ECF of fast-growing poplars

Abstract

The invention discloses a method for preparing a paper-based material by bleaching KP pulp through biochemical method ECF of fast-growing poplars. The method comprises the following steps: (1) preparing paper pulp by utilizing a bleaching of the biochemical method ECF of the fast-growing poplars; (2) carrying out gradient beating on the prepared paper pulp to obtain paper pulp with three types of beating degrees, wherein the beating degree of the first paper pulp is 10 degrees SR to 30 degrees SR, the beating degree of the second paper pulp is 30 degrees SR to 55 degrees SR and the beating degree of the third paper pulp is 55 degrees SR to 70 degrees SR; carrying out papermaking molding or pressing molding on mixed pulp to obtain the paper-based material. By adopting two key technologies including a gradient beating technology and a self-adding technology, the disadvantages in a single beating technology in the prior art are overcome and the utilization of an additional additive is avoided; a prepared paper base has the advantages of high folding endurance, high breaking resistance, tearing indexes and the like; the method is suitable for preparation of various types of paper bases and is especially suitable for preparation of an environment-friendly packaging paper-based material.

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 fast-growing poplar by biochemical method ECF bleaching KP pulp. Background technique [0002] Since 2012, the total output of paper and paperboard 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 the pulp and paper industry continues to increase. At present, 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 developm...

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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