How Paper is Made

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 improvement of physical strength indicators, strong shear resistance, and good bonding force. Effect

Active Publication Date: 2016-08-24
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 paper manufacturing method of the present invention is as follows:

[0034] Present embodiment is to make handwritten sheet in laboratory, and the manufacturing method of paper comprises the following steps:

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

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

[0037] In the third step, 2 g of precipitated calcium carbonate (filler) was added to the first mixture, and the second mixture was formed after stirring again for 60 s.

[0038] Step 4: Add 4.5Kg / T filler flocculant with a charge of 10meq / g and a molecular weight of 3000KDa to the second mixture, stir for 60s to form a third mixture and keep it warm at 50°C for later use.

[...

no. 3 example

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

[0045] Present embodiment is to make handwritten sheet in laboratory, and the manufacturing method of paper comprises the following steps:

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

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

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

[0049] Step 3: Add 8 g of talcum powder (filler) to the first mixture, and stir again for 60 seconds to form the second mixture.

[0050] Step 4: Add 0.5Kg / T filler, a filler flocculant with a charge of 30meq / g and a molecular weight of 10,000KDa to the second mixture, stir for 60s to form a third mixture and keep it warm ...

no. 4 example

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

[0056] Present embodiment is to make handwritten sheet in laboratory, and the manufacturing method of paper comprises the following steps:

[0057] Step 1: Take 6g of chemical coniferous wood pulp, dilute it with white water to a concentration of 4.0% after dispersion.

[0058] Step 2: Add 2.0Kg / T filler to the coniferous wood pulp, ultra-high molecular weight cationic polyacrylamide with a charge of 7.5meq / g and a molecular weight of 10000KDa, and stir for 60s to form the first mixture.

[0059] Step 3: Add 6 g of ground calcium carbonate (filler) to the first mixture, and stir again for 60 seconds to form the second mixture.

[0060] Step 4: Add 3.5Kg / T filler, a filler flocculant with a charge of 25meq / g and a molecular weight of 10,000KDa to the second mixture, stir for 60s to form a third mixture and keep it warm at 50°C for later use.

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

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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