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Method for making paper

A manufacturing method and paper technology, applied in the field of paper manufacturing, can solve the problems of low physical strength indicators such as tensile strength, cohesion, and folding resistance, and achieve the goal of improving physical strength indicators, strengthening bonding force, and strong shear resistance Effect

Active Publication Date: 2014-07-30
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a paper manufacturing method, which can solve the technical problems of low physical strength indicators such as paper tensile strength, cohesion, and folding resistance in the prior art.

Method used

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no. 2 example

[0033] The second embodiment of the paper manufacturing method of the present invention is as follows:

[0034] In this embodiment, a handprint is made in a laboratory, and the paper manufacturing method includes the following steps:

[0035] In the first step, 10g of chemical hardwood pulp is taken and diluted with white water to a concentration of 5.0%.

[0036] The second step is to add 0.5Kg / T filler to the chemical hardwood pulp with a charge of 15meq / g and an ultra-high molecular weight cationic polyacrylamide with a molecular weight of 30000KDa, and the first mixture is formed after stirring for 60s.

[0037] The third step is to add 2 g of precipitated calcium carbonate (filler) to the first mixture, and stir again for 60 seconds to form a second mixture.

[0038] The fourth step: add 4.5Kg / T filler with a charge of 10meq / g and a molecular weight of 3000KDa filler flocculant to the second mixture, stir for 60s to form the third mixture and keep it at 50°C for standby use.

[0039...

no. 3 example

[0044] The third embodiment of the paper manufacturing method of the present invention is as follows:

[0045] In this embodiment, a handprint is made in a laboratory, and the paper manufacturing method includes the following steps:

[0046] Step 1: Take 4g of BCTMP, disperse with hot water and dilute with white water to a concentration of 0.8%.

[0047] In the first step, BCTMP can also be replaced with APMP or other mechanical pulp.

[0048] Step 2: Add 5Kg / T filler to BCTMP, charge 5meq / g, and ultra-high molecular weight cationic polyacrylamide with a molecular weight of 8000KDa. After stirring for 60s, the first mixture is formed.

[0049] The third step: Add 8 g of talc (filler) to the first mixture, and stir again for 60 seconds to form a second mixture.

[0050] The fourth step: add 0.5Kg / T filler to the second mixture, a filler flocculant with a charge of 30 meq / g and a molecular weight of 10000 KDa, stir for 60 seconds to form a third mixture and keep it at 50°C for standby use....

no. 4 example

[0055] The fourth embodiment of the paper manufacturing method of the present invention is as follows:

[0056] In this embodiment, a handprint is made in a laboratory, and the paper manufacturing method includes the following steps:

[0057] The first step: Take 6g of chemical softwood pulp and dilute with white water to a concentration of 4.0% after dispersion.

[0058] The second step: add 2.0Kg / T filler to softwood pulp, charge amount of 7.5meq / g, ultra-high molecular weight cationic polyacrylamide with molecular weight of 10000KDa, and form the first mixture after stirring for 60s.

[0059] The third step: add 6 g of ground calcium carbonate (filler) to the first mixture, and stir again for 60 seconds to form a second mixture.

[0060] The fourth step: add 3.5Kg / T filler to the second mixture, a filler flocculant with a charge of 25meq / g and a molecular weight of 10000KDa. After stirring for 60s, the third mixture is formed and kept at 50°C for standby use.

[0061] Step 5: Take 10g...

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Abstract

The invention discloses a method for making paper. The method comprises the following steps: preparing a sizing agent of certain concentration, adding ultra-high molecular weight cationic polyacrylamide of which the molecular weight is 8000K-30000KDa into the sizing agent, uniformly mixing to form a first mixture characterized in that positive charges covering the sizing agent, adding packing of certain concentration and with negative charges into the first mixture, uniformly mixing to form a second mixture characterized in that the sizing agent, the ultra-high molecular weight cationic polyacrylamide and the packing are wrapped with one another, adding a packing flocculating agent of which the molecular weight is 3000K-10000KDa into the second mixture so as to form a third mixture, dispensing pulp by using the third mixture and making into paper. In such a mode, the method improves the physical strength indexes such as internal aggregation and fracture resistance of the prepared paper.

Description

Technical field [0001] The present invention relates to the technical field of paper manufacturing, in particular to a paper manufacturing method. Background technique [0002] Papermaking filler is a mineral pigment or synthetic material used to improve the performance of paper, improve the use requirements of paper and save the cost of slurry. Commonly used fillers in the paper industry include calcium carbonate, talc, kaolin and titanium dioxide. Among them, calcium carbonate can significantly improve the opacity, whiteness and printing adaptability of paper due to its high whiteness and uniform particle distribution, making it the most ideal papermaking filler in the papermaking process. [0003] The main purpose of adding fillers to paper is to improve the whiteness, opacity and printability of the paper. At the same time, paper mills always try to increase the amount of fillers to reduce costs. However, with the increase in the amount of filler added, the bonding force betw...

Claims

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Application Information

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IPC IPC(8): D21H11/00D21H17/29
Inventor 董郑伟於旺盛龚斌马明玉黄铖
Owner GOLD EAST PAPER JIANGSU
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