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Composite paper strength enhancer and preparation method thereof

A paper strength enhancer and evenly mixing technology, applied in the field of papermaking, can solve the problems of reduced production capacity, increased energy consumption per unit, longer water line, etc., to achieve the effect of enhancing internal bonding strength, ensuring paper quality, and improving production efficiency

Active Publication Date: 2022-05-13
SHANDONG BOHUI PAPER INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, while dry strength agents increase the strength of paper, they also have a negative impact on the dehydration of waste paper pulp, generally resulting in longer waterlines and affecting the moisture content during layering and compounding.
Especially when the gypsum board face paper is produced by the laminated paper machine, the addition amount of the layered dry strength agent varies greatly, resulting in a large difference in moisture during layering and compounding
There will be quality problems such as bubbling and delamination in the finished paper, which will have a huge negative impact on its production and use
In addition, for high-speed paper machines, the slower paper dehydration speed will lead to limited speed, increased energy consumption and reduced production capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of composite paper strengthening agent, concrete steps are as follows:

[0029] (1) earlier take starch, polyethyleneimine as raw material, obtain starch-polyethyleneimine graft copolymer;

[0030] (2) take epichlorohydrin and polyacrylamide as raw materials again to obtain polyamide epichlorohydrin resin;

[0031] (3) Finally, mix the starch-polyethyleneimine graft polymer and the polyamide epichlorohydrin resin in a mass ratio of 1:50:30 to obtain the composite paper strength enhancer.

[0032] The concrete method of step (1) is as follows:

[0033] (1-1) Spray 3 g of distilled water into 10 g of ethyleneimine monomer, then add 0.02 g of ammonium persulfate and 0.004 g of sodium bisulfite while stirring, heat to 55 ° C for 80 minutes, and dry. Obtain polyethyleneimine;

[0034] (1-2) Then add 8g of tapioca starch into 25g of water, stir and mix to make starch milk, then stir and mix the starch milk with the obtained polyethyleneimine of...

Embodiment 2

[0043] A kind of preparation method of composite paper strengthening agent, concrete steps are as follows:

[0044] (1) earlier take starch, polyethyleneimine as raw material, obtain starch-polyethyleneimine graft copolymer;

[0045] (2) take epichlorohydrin and polyacrylamide as raw materials again to obtain polyamide epichlorohydrin resin;

[0046] (3) Finally, mix the graft compound, starch-polyethyleneimine graft polymer, and polyamide epichlorohydrin resin according to the mass ratio of 1:55:25 to obtain the composite paper strength enhancement agent.

[0047] The concrete method of step (1) is as follows:

[0048] (1-1) Spray 2g of distilled water into 12g of ethyleneimine monomer, then add 0.03g of ammonium persulfate and 0.003g of sodium bisulfite while stirring, heat to 60°C for 70 minutes of polymerization reaction, and dry. Obtain polyethyleneimine;

[0049](1-2) then add 10g of tapioca starch into 20g of water, stir and mix to make starch milk, then stir and mi...

Embodiment 3

[0058] A kind of preparation method of composite paper strengthening agent, concrete steps are as follows:

[0059] (1) earlier take starch, polyethyleneimine as raw material, obtain starch-polyethyleneimine graft copolymer;

[0060] (2) take epichlorohydrin and polyacrylamide as raw materials again to obtain polyamide epichlorohydrin resin;

[0061] (3) Finally, mix the graft compound, starch-polyethyleneimine graft polymer, and polyamide epichlorohydrin resin according to the mass ratio of 1:53:28 to obtain the composite paper strength enhancement agent.

[0062] The concrete method of step (1) is as follows:

[0063] (1-1) Spray 2.5g of distilled water into 11g of ethyleneimine monomer, then add 0.025g of ammonium persulfate and 0.0035g of sodium bisulfite while stirring, heat to 58°C for 75 minutes, and dry , to obtain polyethyleneimine;

[0064] (1-2) then add 9g of tapioca starch into 22g of water, stir and mix to make starch milk, then stir and mix the starch milk w...

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Abstract

The invention discloses a composite paper strength enhancer and a preparation method thereof. The composite paper strength enhancer is specifically obtained by compounding a starch-polyethyleneimine graft polymer and polyamide epichlorohydrin resin. The paper strength enhancer can enhance the internal bonding strength of paper, ensure the quality of the paper, reduce the occurrence of bubbling and layering phenomena, is small in dosage, does not influence the dehydration performance of the paper, reduces the cost and improves the production efficiency.

Description

technical field [0001] The invention relates to a paper strength enhancer, in particular to a composite paper strength enhancer and a preparation method thereof. It belongs to the technical field of papermaking. Background technique [0002] With the continuous development of modern human civilization, paper has gradually become an indispensable material in the fields of industry, agriculture, commerce, construction, etc., and is not completely limited to the use of cultural fields such as writing. The demand for paper is also increasing year by year. As we all know, the raw materials of paper and cardboard are mainly plant fibers, and trees contain a lot of plant fibers. Therefore, the massive felling of trees has sharply reduced the forest coverage in our country, causing animals to lose their habitats, soil desertification, and climate deterioration, which have seriously affected ecological balance. my country's pulp and paper industry has followed a "grass-based" appro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18D21H17/28D21H17/56D21H17/55C08G73/02C08G81/00C08G69/48
CPCD21H21/18D21H17/72D21H17/28D21H17/56D21H17/55C08G73/0213C08G81/00C08G69/48
Inventor 陈腾飞唐良倦周雪林崔若忠
Owner SHANDONG BOHUI PAPER INDUSTRY CO LTD
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