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Dual-direction combination-type papermaking enhancing process and device

A combined and process technology, applied in the addition of reinforcing agents and retention aids, can solve the problems of inability to meet the strength requirements and printing performance requirements of thin special paper, inconsistent printing quality of printed matter, and large amount of filler components. To achieve the effect of lifting, the preparation method is simple and easy, and the effect of improving the dihedral property

Active Publication Date: 2012-04-18
ZHEJIANG KAIFENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some low-quantity, high-filling thin-page specialty papers have thin sheets and large amounts of fillers, and the surface strength of the paper is generally poor. During printing, the paper is prone to printing failures such as dusting and fluffing. In addition, because the paper is in the During the papermaking process, affected by the dehydration of the wire part and the drying of the dryer, the ink penetration of the paper has two sides, which makes the printing quality of the two sides of the printed matter inconsistent
In the past, in the general production, cationic starch was added separately to the slurry as a strengthening agent for the slurry, and PAM retention aid was added separately to the papermaking system to improve the retention rate of the filler. However, it is still unable to meet the strength requirements and printing performance requirements of the printing process for thin sheet special paper

Method used

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  • Dual-direction combination-type papermaking enhancing process and device
  • Dual-direction combination-type papermaking enhancing process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] raw material:

[0021] A), cationic starch 6kg

[0022] water 130kg

[0023] B), oligomeric cation modified PAM 0.5kg

[0024] water 500kg

[0025] C), high polycation modified PAM 0.3kg

[0026] Polyethyleneimine 1.5kg

[0027] 180kg of water;

[0028] Specific preparation and usage:

[0029] A): Dissolve 6Kg of cationic starch in 50Kg of water, stir and disperse evenly, heat to 80°C to 90°C, gelatinize at this temperature for 20 minutes, add water to dilute to 80Kg, continue stirring to further dissolve to form a solution.

[0030] B): Spray 0.5Kg of oligomeric cation-modified PAM into 500Kg of water with an injector, continue to stir and further dissolve to make a solution.

[0031] C), 0.3Kg of high polycation modified PAM was added to 1.5Kg of polyethyleneimine, after fully stirring, it was dissolved in 180Kg of water, and the stirring was continued to further dissolve to form a solution.

[0032] Dosage: The solid content of the above-mentioned internal bi...

Embodiment 2

[0035] raw material:

[0036] A), cationic starch 10kg

[0037] water 170kg

[0038] B), oligomeric cation modified PAM 0.7kg

[0039] Water 700kg

[0040] C), high polycation modified PAM 0.5kg

[0041] Polyethyleneimine 1.2kg

[0042] water 180kg

[0043] Specific preparation and usage:

[0044] A): Dissolve 10Kg of cationic starch in 70Kg of water, stir and disperse evenly, heat to 80-90°C, gelatinize at this temperature for 20 minutes, add water to dilute to 100Kg, continue stirring to further dissolve to form a solution.

[0045] B): Change 0.7Kg of oligomeric cation into PAM, spray it into 700Kg of water with an injector, continue to stir and further dissolve to make a solution.

[0046] C), 0.5Kg of high polycation modified PAM was added to 1.2Kg of polyethyleneimine, after fully stirring, it was dissolved in 180Kg of water, and the stirring was continued to further dissolve to form a solution.

[0047] Dosage: The solid content of the above-mentioned internal b...

Embodiment 3

[0050] A device for two-way combined papermaking enhancement process, the device includes a pulp mixing tank 3, a high-consistency high-level box 4, a flushing tank 5, a desander 6, a low-consistency high-level box 7, a rotary wing screen 8 and a slurry flow The front end of the machine 9 and the pulp mixing tank 3 are connected with an internal binding reinforcing modifier adding silo, which is composed of a cationic starch silo 2 and an oligomerization modified polyacrylamide silo 1. The rear end of the pulp mixing tank 3 is connected to the high-consistency high-level tank 4 through the material pump, the high-consistency high-level tank 4 is connected to the flushing tank 5, the pulping tank 5 is connected to the desander 6 through the material pump, and the desander 6 is connected to the low-consistency high level tank 7 , the low-concentration high-level box 7 is connected to the rotary wing screen 8, the outlet pipeline of the rotary wing screen 8 is connected with a ret...

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Abstract

The invention relates to a papermaking process, in particular to a dual-direction combination-type papermaking enhancing process and a device being applied by same. The dual-direction combination-type papermaking enhancing process comprises the following steps that: internal-combinational enhanced modifier is added in sizing agent in a sizing agent floating system, retention modifier is added in the sizing agent after diluting the sizing agent and before forming the sizing agent, and the internal-combinational enhanced modifier comprises cationic starch, oligomerization modification polyacrylamide and water; and the retention modifier comprises polyethyleneimine, high-polymer modification polyacrylamide and water. By simultaneously adopting two systems, not only the internal combination strength of the fibers can be improved, but also retention rate of the stuffing and the tiny fibers can be improved, the dual character of the paper can be improved, and the paper can be prevented fromdropping powder and having color difference at two sides. The preparation method is simple and easy, can be realized by increasing little cost on the basis of the original production technological process, has stable product quality, and has remarkable improvement effect.

Description

technical field [0001] The invention relates to a papermaking process, in particular to a two-way combined papermaking strengthening process and a device used in the process. Background technique [0002] During the printing process of the paper, the paper surface is in contact with the ink to bear a certain contact pressure. Under this pressure, the ink will produce sticking force and peeling force on the surface of the paper, and this pulling force and peeling force will increase with the printing speed. Some low-quantity, high-filling thin-page specialty papers have thin sheets and large amounts of fillers, and the surface strength of the paper is generally poor. During printing, the paper is prone to printing failures such as dusting and fluffing. In addition, because the paper is in the During the papermaking process, affected by the dehydration of the wire part and the drying of the dryer, the ink penetration of the paper has two sides, which makes the printing quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/10D21H21/18
Inventor 计皓张琦雷荣陶慧贤周振宇
Owner ZHEJIANG KAIFENG NEW MATERIAL CO LTD
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