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A method for preparing paper-based materials from full chlorine-free bleached chemical pulp of softwood kraft mixed kraft pulp

A technology of kraft pulp and mixed pulp, applied in pulp beating method, chemical/chemical mechanical pulp, special paper, etc. high smoothness effect

Active Publication Date: 2018-06-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the burst index of the paper base prepared by this method is small, which is unfavorable for the preparation of paper with a high burst index (such as heat-sensitive base paper).

Method used

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  • A method for preparing paper-based materials from full chlorine-free bleached chemical pulp of softwood kraft mixed kraft pulp
  • A method for preparing paper-based materials from full chlorine-free bleached chemical pulp of softwood kraft mixed kraft pulp
  • A method for preparing paper-based materials from full chlorine-free bleached chemical pulp of softwood kraft mixed kraft pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a paper-based material from needle-leaf mixed kraft full chlorine-free bleached chemical pulp. This embodiment prepares a heat-sensitive raw paper paper-based material.

[0041] Proceed as follows:

[0042] (1) The high-performance chlorine-free bleached chemical pulp obtained by the patent ZL201210405720.7 "a process for fully chlorine-free bleaching of coniferous and broadleaf mixed kraft chemical pulp", softwood kraft chemical pulp and hardwood kraft chemical pulp The ratio of the pulp is 1:1, the pulp whiteness is 82.2% ISO, take three parts of the pulp according to 100g·t -1 Add the LPK-CR1 (L1) beating enzyme of Lvweikang Co., Ltd. to the amount of dry pulp for mixing treatment, and then use the PFI mill for precise refining, so that the beating degrees of the pulp are 20°SR, 45°SR, and 65°SR respectively. .

[0043] The bleaching process specifically includes the following steps:

[0044] 1. Mix the cooked softwood kraft pulp with a kapp...

Embodiment 2

[0061] Example 2 A method for preparing a paper-based material from needlewood mixed kraft full chlorine-free bleached chemical pulp. This embodiment prepares a heat-sensitive base paper paper-based material.

[0062] Proceed as follows:

[0063] (1) The high-performance chlorine-free bleached chemical pulp obtained by the patent ZL201210405720.7 "a process for fully chlorine-free bleaching of coniferous and broadleaf mixed kraft chemical pulp", softwood kraft chemical pulp and hardwood kraft chemical pulp The pulp ratio is 3:1, the pulp brightness is 82.5%ISO, and three parts of the pulp are refined by PFI mill, so that the beating degrees of the pulp are 15°SR, 50°SR, and 60°SR respectively.

[0064] The bleaching process specifically includes the following steps:

[0065] 1. Mix the cooked softwood kraft pulp with a kappa number of 16-23 and the hardwood kraft pulp with a kappa number of 16-22 at a mass ratio of 3:1, wash and mix evenly , put the needle-wood mixed pulp in...

Embodiment 3

[0083] A method for preparing a paper-based material from mixed kraft full chlorine-free bleached chemical pulp, this embodiment prepares a transfer printing paper-based material.

[0084] Proceed as follows:

[0085] (1) The high-performance chlorine-free bleached chemical pulp obtained by the patent ZL201210405720.7 "a process for fully chlorine-free bleaching of coniferous and broadleaf mixed kraft chemical pulp", softwood kraft chemical pulp and hardwood kraft chemical pulp The pulp ratio is 1:1, the pulp brightness is 82.3%ISO, and three parts of the pulp are refined by PFI mill, so that the beating degrees of the pulp are 20°SR, 45°SR, and 65°SR respectively.

[0086] The bleaching process specifically includes the following steps:

[0087] 1. Mix the cooked softwood kraft pulp with a kappa number of 16-23 and the hardwood kraft pulp with a kappa number of 16-22 at a mass ratio of 1:1, wash and mix evenly , put the needle-wood mixed pulp into a polyethylene plastic bag...

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Abstract

The invention discloses a method for preparing a paper base material through a needle broad-leaved mixed sulfate pulp total-chlorine-free bleaching chemical pulp. The method comprises the following steps of (1) using a needle broad-leaved mixed pulp obtained by bleaching through a biochemical method as a paper pulp raw material, dividing the paper pulp raw material into three parts, and respectively pulp-beating, wherein the pulp-beating degree of the first paper pulp ranges from 15 to 25 degrees SR, the pulp-beating degree of the second paper pulp ranges from 45 to 55 degrees SR, and the pulp-beating degree of the third paper pulp ranges from 60 to 75 degrees SR; (2) mixing the three paper pulps prepared in the step (1) according to a certain proportion so as to obtain a mixed pulp, and enabling the mass ratio of the first paper pulp, the second paper pulp and the third paper pulp in the mixed pulp to be 10 to 30:65 to 85:10 to 20; (3) mixing moulding or compression moulding the mixed pulp obtained the step (2) so as to obtain the paper base material. According to the method provided by the invention, a gradient pulp-beating method is adopted, and paper pulp fibers with different pulp-beating degrees are mixed, so that the paper base material can be ensured to have a favorable drainage property during a preparation process, and the prepared paper base material has higher strength.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing paper-based materials from full chlorine-free bleached chemical pulp mixed with hardwood and kraft pulp. Background technique [0002] my country is the largest paper-making country in the world. In 2010, my country's paper and cardboard output surpassed that of the United States, ranking first in the world. At present, my country's total output of paper and paperboard has exceeded a quarter of global output. 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. These wood materials mainly include coniferous wood and hardwood. With the development of society and science and technology, using the component separation technology of wood fiber papermaking raw materials, while separating them to prepare traditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/04D21D1/02D21H27/00
CPCD21D1/02D21H11/04D21H27/00
Inventor 陈嘉川吉兴香杨桂花田中建马浩袁素娟
Owner QILU UNIV OF TECH
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