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Method of improving retention rate of pulp molded fibers

A pulp fiber and pulp molding technology, which is applied in the direction of non-fibrous pulp addition, fiber raw material processing, paper, etc., can solve the problems of high filler loss rate, high papermaking cost, high pollution, etc., achieve good physical and chemical properties, and reduce pulp consumption , Improve the effect of water filtration performance

Active Publication Date: 2013-05-15
SHAONENG GRP GUANGDONG LVZHOU PAPER MOLD PACKING PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, my country's paper industry is booming, but its defects of high pollution and high energy consumption have always existed. How to transform into an environmentally friendly, green and sustainable industry? It is an urgent problem for technicians in this field to solve
[0004] In the prior art, retention aids are mainly used to increase the retention rate of fibers, but this method has technical defects such as high papermaking costs and high loss rate of fillers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] ①. Preparation of chemical modification solution: Add chemical additives including 0.02% cationic polyacrylamide, 1% water repellent, and 0.06% oil repellant to the mixing tank, and add pure water to dilute , after dilution, the chemically modified solution whose solid content of chemical additives accounts for 69% of the total solution mass is obtained;

[0025] ②. Preparation of pulp fibers: dry pulp fibers are dispersed and diluted with pure water to form pulp fibers with a pulp mass concentration of 1%;

[0026] ③. Mixing reaction: put the chemical modification solution prepared in step ① and the pulp fiber prepared in step ② into the reaction tank and mix, stir evenly and fully react;

[0027] ④. Molding: Inject the mixture fully reacted in step ③ into the material forming area of ​​the pulp molding device, followed by grouting for 6.3s, suction filtration for 30s, cold pressing for 3s, and finally hot pressing at 190°C for 3s before forming.

[0028] The mesh num...

Embodiment 2

[0032] ①. Preparation of chemical modification solution: Add chemical additives including 0.04% cationic polyacrylamide, 2% water repellent, and 0.07% oil repellant to the mixing tank, and add pure water to dilute , after dilution, the chemically modified solution whose solid content of chemical additives accounts for 69% of the total solution mass is obtained;

[0033] ②. Preparation of pulp fibers: dry pulp fibers are dispersed and diluted with pure water to form pulp fibers with a pulp mass concentration of 1%;

[0034] ③. Mixing reaction: put the chemical modification solution prepared in step ① and the pulp fiber prepared in step ② into the reaction tank and mix, stir evenly and fully react;

[0035] ④. Molding: Inject the mixture fully reacted in step ③ into the material forming area of ​​the pulp molding device, followed by grouting for 6.3s, suction filtration for 30s, cold pressing for 3s, and finally hot pressing at 190°C for 3s before forming.

[0036] The mesh num...

Embodiment 3

[0040] ①. Preparation of chemical modification solution: Add chemical additives including 0.08% cationic polyacrylamide, 4% water repellant, and 0.08% oil repellant to the mixing tank, and add pure water to dilute , after dilution, the chemically modified solution whose solid content of chemical additives accounts for 69% of the total solution mass is obtained;

[0041] ②. Preparation of pulp fibers: dry pulp fibers are dispersed and diluted with pure water to form pulp fibers with a pulp mass concentration of 1%;

[0042] ③. Mixing reaction: put the chemical modification solution prepared in step ① and the pulp fiber prepared in step ② into the reaction tank and mix, stir evenly and fully react;

[0043] ④. Molding: Inject the mixture fully reacted in step ③ into the material forming area of ​​the pulp molding device, followed by grouting for 6.3s, suction filtration for 30s, cold pressing for 3s, and finally hot pressing at 190°C for 3s before forming.

[0044] The mesh num...

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Abstract

The invention provides a method of improving a retention rate of pulp molded fibers. The principle of the method of the retention rate of pulp molded fibers is that pulp is defibered and dried, chemical assistant agents such as oil-proof agents and water-proof agents are added into the pulp. The mixture is evenly stirred and added with cationic polyacrylamide. A huge flocculation cluster is formed through a flocculation reaction of the cationic polyacrylamide and pulp fibers. After tiny pulp fibers are combined with the assistant agents and form the flocculation cluster, as the physico-chemical property is changed so that the pulp are not prone to sweep away by water currents and the retention rate of the pulp is improved. Thus, quality of paper products is ensured and at the same time, economic loss and resource waste due to the fact that the pulp fibers run off are avoided and development prospect and market value are good.

Description

technical field [0001] The invention relates to the field of pulp molding, in particular to a method for improving the retention rate of pulp molding fibers. Background technique [0002] At present, my country's paper industry is booming, but its defects of high pollution and high energy consumption have always existed. How to transform into an environmentally friendly, green and sustainable industry? It is a problem to be solved urgently by those skilled in the art. In order to meet the requirements of environmental protection, it is necessary to start from the conservation of materials and energy, to meet the diverse needs of consumers as the goal, and to produce paper under the conditions of energy conservation and emission reduction. In recent years, in order to reduce the cost, the basis weight of paper has become lower and thinner. Although this method has a certain effect on energy saving, it inevitably affects most of the physical properties of the paper due to the...

Claims

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Application Information

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IPC IPC(8): D21J3/00D21H21/14D21H17/55D21H17/59
Inventor 刘保林杨仁党邱平平叶建平刘德桃
Owner SHAONENG GRP GUANGDONG LVZHOU PAPER MOLD PACKING PROD CO LTD
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