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Method for preparing paper-based material from sodium hydroxide-anthraquinone pulp of fast-growing poplars through biochemical-process ECF (elemental chlorine-free) bleaching

A sodium hydroxide anthracene, biochemical technology, used in chemical/chemomechanical pulp, pulp bleaching, cellulose treatment with microorganisms/enzymes, etc., can solve the problem of thick sizing, decreased stiffness and strength, and safety hazards. The paper is not easy to degrade. , large drop and other problems, to avoid poor control of beating conditions, easy degradation of strength, and reduced beating degree requirements.

Active Publication Date: 2017-05-17
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Method for preparing paper-based material from sodium hydroxide-anthraquinone pulp of fast-growing poplars through biochemical-process ECF (elemental chlorine-free) bleaching
  • Method for preparing paper-based material from sodium hydroxide-anthraquinone pulp of fast-growing poplars through biochemical-process ECF (elemental chlorine-free) bleaching
  • Method for preparing paper-based material from sodium hydroxide-anthraquinone pulp of fast-growing poplars through biochemical-process ECF (elemental chlorine-free) bleaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 A biochemical method of ECF bleaching sodium hydroxide anthraquinone pulp of fast-growing poplar to prepare paper-based materials. This example prepares household paper-based materials.

[0041] Proceed as follows:

[0042] (1) High-performance element-free chlorine-free fast-growing poplar bleached chemical pulp obtained by the patent ZL 201310300135.5 "a fast-growing poplar with sodium hydroxide anthraquinone pulp biochemical method ECF bleaching process", the pulp brightness is 86.3% ISO, take three parts The pulp is precisely refined by PFI mill, so that the beating degrees of the pulp are 15°SR, 35°SR, and 55°SR respectively.

[0043] The concrete preparation method of the pulp of whiteness 86.3%ISO is:

[0044] 1) Cooking: Take fast-growing poplar wood chips with a length of 15-25mm, a width of 10-20mm, and a thickness of 3-5mm. After natural air-drying, they are cooked to obtain a fast-growing poplar sodium hydroxide anthraquinone puree. The cooking co...

Embodiment 2

[0053] Example 2 A biochemical method of ECF bleaching sodium hydroxide anthraquinone pulp for fast-growing poplar to prepare paper-based materials. This example prepares household paper-based materials.

[0054] Proceed as follows:

[0055] (1) Using the pulp prepared in Example 1 with a brightness of 86.3% ISO, three parts of the pulp were refined using a PFI mill so that the beating degrees of the pulp were 20°SR, 40°SR, and 60°SR respectively.

[0056] (2) The pulp fiber raw materials that have been beaten or refined and prepared according to the pulp fiber raw materials mixing ratio of 15:70:15 (mass ratio) with a beating degree of 20 ° SR, 40 ° SR, and 60 ° SR are decomposed by a fiber decomposer. It is homogeneously mixed and then pressed on a sheet former at 35 g / m 2 Paper-based materials for household use.

[0057] (3) At the same time, select 100% pulp fiber raw material with a beating degree of 40 ° SR, decompose it through a fiber decomposer to make it evenly mix...

Embodiment 3

[0062] Example 3 A biochemical method of ECF bleaching sodium hydroxide anthraquinone pulp of fast-growing poplar to prepare paper-based materials. This example prepares environmentally friendly packaging paper-based materials.

[0063] Proceed as follows:

[0064] (1) Using the pulp with a brightness of 86.3%ISO prepared in Example 1, three parts of the pulp were refined using a PFI mill so that the beating degrees of the pulp were 25°SR, 45°SR, and 65°SR respectively.

[0065] (2) Pulp fibers that have been beaten or refined and prepared according to the pulp fiber raw material mixing ratio of 15:80:5 (mass ratio) with a beating degree of 25 ° SR, 45 ° SR, and 65 ° SR through a fiber decomposer to make it Mix evenly, then press on a sheet former 120g / m 2 Eco-friendly packaging paper-based material.

[0066] (3) At the same time, select 100% pulp fiber raw material with a degree of beating of 45°SR, disperse it through a fiber decomposer to make it evenly mixed, and then pr...

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Abstract

The invention discloses a method for preparing paper-based material from sodium hydroxide-anthraquinone pulp of fast-growing poplars through biochemical-process ECF (elemental chlorine-free) bleaching. The method includes the steps of (1), preparing paper pulp from the sodium hydroxide-anthraquinone pulp of the fast-growing poplars through an ECF bleaching technology; (2), subjecting the prepared paper pulp to gradient beating so as to obtain three kinds of paper pulp with three beating degrees, wherein the beating degree of the first kind of paper pulp is 10-30 degrees SR, the beating degree of the second kind of paper pulp is 30-55 degrees SR and the beating degree of the third kind of paper pulp is 55-70 degrees SR; subjecting the mixed pulp to vat formation or pressing formation so as to obtain the paper-based material. The method has the advantages that through adoption of two critical technologies including a gradient beating technology and a self-adding technology, the shortcomings of a single beating technology in the prior art are overcome, additional additives are avoided, the prepared paper-based material is suitable for preparing multiple types of paper bases and paper bases for daily life in particular.

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 biochemical method ECF bleaching sodium hydroxide anthraquinone 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 ind...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21C9/10D21C9/14D21C9/16D21H11/02
CPCD21C5/005D21C9/10D21C9/144D21C9/163D21H11/02
Inventor 田中建吉兴香陈嘉川杨桂花吕高金马浩袁素娟
Owner QILU UNIV OF TECH
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