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Papermaking slurry preparation method

A preparation method and slurry technology, which is applied in the field of papermaking, can solve the problems such as poor effect of final paper strength improvement, and achieve the effect of strength improvement

Inactive Publication Date: 2017-02-15
GOLD EAST PAPER JIANGSU
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  • Claims
  • Application Information

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Problems solved by technology

However, this method of addition is mainly to improve retention and water filtration, which is not effective in improving the final paper strength.

Method used

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Experimental program
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Effect test

Embodiment

[0037] In the mixed pulp, there are 20% bleached softwood pulp, 70% bleached hardwood pulp and 10% chemical mechanical pulp.

[0038] The total amount of cationic starch added is 8kg (absolute-dry starch) / ton of paper, and the amount of cationic starch in the first part (added to the thick stock part) is set as a, and the amount of cationic starch in the second part (added to the thin stock part) is set as b;

[0039] In embodiment 1, a=7kg (absolute dry starch) / ton of paper, b=1kg (absolute dry starch) / ton of paper;

[0040] In embodiment 2, a=4kg (absolute dry starch) / ton of paper, b=4kg (absolute dry starch) / ton of paper;

[0041] In embodiment 3, a=6kg (absolute dry starch) / ton of paper, b=2kg (absolute dry starch) / ton of paper;

[0042] In embodiment 4, a=1kg (absolute dry starch) / ton of paper, b=7kg (absolute dry starch) / ton of paper;

[0043] In Example 5, a=7.5kg (absolute dry starch) / ton of paper, b=0.5kg (absolute dry starch) / ton of paper;

[0044] In comparative ...

Embodiment 4

[0049] In Example 4, a=1kg (absolute-dry starch) / ton of paper, b=7kg (absolute-dry starch) / ton of paper, a≤b, the water drainage performance is mainly improved, and the improvement of paper strength is not obvious.

[0050] In Example 5, b=0.5kg (absolute-dry starch) / ton of paper, b≤1kg (absolute-dry starch) / ton of paper, which mainly shows that the strength of the paper is improved, and the drainage performance of the pulp is not significantly improved.

[0051] The above detailed description of the specific embodiments of the present invention can be understood that in the present invention, the cationic starch addition process of the papermaking process has been improved, and cationic starch is added simultaneously in thick stock and thin stock, but the total amount of cationic starch has not been improved. the added amount. In the new addition process, the cationic starch added to the thick stock and thin stock has a synergistic effect, which improves the strength of the p...

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Abstract

The present invention discloses a papermaking slurry preparation method, which comprises adding cationic starch to a papermaking pulp, wherein the step of the addition of the cationic starch to the papermaking pulp comprises: dividing cationic starch to be added into a pulp into a first part and a second part, adding the first part of the cationic starch at the thick pulp position of the papermaking pulp, and adding the second part of the cationic starch at the dilute pulp position of the papermaking pulp. With the technical scheme of the present invention, the reinforcing performance and the water filtration performance of the papermaking pulp can be simultaneously improved so as to finally improve the performance of the paper.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a method for configuring papermaking slurry. Background technique [0002] Cationic starch, because of its positive charge, can be closely combined with negatively charged pulp fibers, fine fibers, and papermaking fillers, and has the functions of strengthening and retention and drainage, so it is widely used in papermaking processes. [0003] There are two methods for adding cationic starch in the existing papermaking process, as follows: [0004] Cationic starch is added in the papermaking sections such as the mixed pulp tank and the paper machine pulp tank (the pulp has not been diluted with the white water of the paper machine). Thick stock. Added in these sections, the cationic starch has a better effect on the reinforcement of the mixed pulp, but has a poor retention effect on the pulp, fine fibers, and paper-making fillers. [0005] The cationic starch is added after the pape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/29D21H23/78
Inventor 王威郝妮王辰孖
Owner GOLD EAST PAPER JIANGSU
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