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

A biochemical, fast-growing poplar technology, applied in the field of papermaking, can solve the problems of sizing thickness, stiffness and strength reduction, safety hazards, paper is not easy to degrade, and the decline is large, so as to avoid poor control of beating conditions and easy degradation of strength , The effect of reducing the requirement of beating degree

Active Publication Date: 2017-05-31
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 by bleaching KP pulp through biochemical method ECF of fast-growing poplars
  • Method for preparing paper-based material by bleaching KP pulp through biochemical method ECF of fast-growing poplars
  • Method for preparing paper-based material by bleaching KP pulp through biochemical method ECF of fast-growing poplars

Examples

Experimental program
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Effect test

Embodiment 1

[0040]Example 1 A method for preparing paper-based materials from fast-growing poplar biochemical method ECF bleaching KP pulp, this embodiment prepares environmentally friendly packaging paper-based materials.

[0041] Proceed as follows:

[0042] (1) High-performance element-free chlorine-free fast-growing poplar bleached chemical pulp obtained by patent ZL201310300563.8 "a fast-growing poplar KP pulp biochemical method ECF bleaching process", the pulp whiteness is 86.1% ISO, three parts of pulp are taken The PFI mill is used for precise refining, so that the beating degrees of the pulp are 25°SR, 45°SR, and 65°SR respectively.

[0043] Wherein, the concrete preparation method of the paper pulp that brightness is 86.1%ISO is as follows:

[0044] 1) Cooking: take the fast-growing poplar wood chips with a length of 15-25mm, a width of 10-20mm, and a thickness of 3-5mm, and after natural air-drying, carry out cooking to obtain the raw pulp of fast-growing poplar sulfate. The c...

Embodiment 2

[0054] Example 2 A method for preparing paper-based materials from fast-growing poplar biochemical method ECF bleaching KP pulp, this embodiment prepares environmentally friendly packaging paper-based materials.

[0055] Proceed as follows:

[0056] (1) Using the pulp prepared in Example 1 as a raw material, 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.

[0057] (2) Pulp fiber raw materials that have been beaten or refined and prepared according to the pulp fiber raw material mixing ratio of 15:75:10 (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 130 g / m 2 Eco-friendly packaging paper-based material.

[0058] (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 mixed, a...

Embodiment 3

[0063] Example 3 A method for preparing paper-based materials from fast-growing poplar biochemical method ECF bleached KP pulp, this embodiment prepares household paper-based materials.

[0064] Proceed as follows:

[0065] (1) Using the pulp prepared in Example 1 as a raw material, three parts of the pulp were finely refined by a PFI mill, so that the beating degrees of the pulp were 15°SR, 35°SR, and 55°SR respectively.

[0066] (2) Pulp fiber raw materials that have been beaten or refined and prepared according to the pulp fiber raw material mixing ratio of 15:70:15 (mass ratio) with a beating degree of 15 ° SR, 35 ° SR, and 55 ° SR are decomposed by a fiber decomposer. It is homogeneously mixed and then pressed on a sheet former at 30 g / m 2 Paper-based materials for household use.

[0067] (3) At the same time, select 100% pulp fiber raw material with a beating degree of 35 ° SR, decompose it through a fiber decomposer to make it evenly mixed, and then press and form 30g...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/02D21H15/02D21D1/02
CPCD21D1/02D21H11/02D21H15/02
Inventor 杨桂花吉兴香陈嘉川田中建马浩袁素娟
Owner QILU UNIV OF TECH
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