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Papermaking sizing agent

A technology of sizing agent and auxiliary agent, used in the field of papermaking additives, can solve the problems of poor adhesion and poor water resistance, and achieve the effects of improving adhesion, strong adhesion and good solvent retention.

Inactive Publication Date: 2018-11-23
朱文杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a paper-making sizing agent for the problems of poor cohesive force and poor water resistance after sizing in the current paper-making sizing agent

Method used

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Examples

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Effect test

preparation example Construction

[0030] The preparation method of composite modified starch nanocrystal comprises the steps:

[0031] (1) In a water bath at 24~28°C, take starch and add solvent A to mix at a mass ratio of 1:4~8, stir and react at 300~350r / min for 20~40min to obtain primary aldehyde structure compounds, and take primary aldehyde structure compounds by mass Ratio 1: 4~8 Add sulfuric acid solution with a concentration of 0.01mol / L to mix, stir at 200~250r / min for 25~50min, let stand for acidolysis for 3~5 days, add NaOH solution with a concentration of 0.1mol / L to adjust the pH to 6.8 ~7.4, centrifuge at 3000~4000r / min to obtain the centrifuge, take the centrifuge, wash it with deionized water, and freeze-dry it at -80°C to obtain the base material;

[0032] (2) Take the base material and mix it with water according to the mass ratio of 1:20~30, and oscillate with 250W ultrasonic waves for 10~15min in a water bath at 40~55°C to obtain a suspension, which is adjusted by adding a hydrochloric acid...

Embodiment 1

[0042] Solvent A: Take dichloroethane and CrO at a mass ratio of 4:0.1 3 ·(C 5 h 5 N) 2 Mix to obtain solvent A.

[0043] Catalyst: Mix sulfuric acid, acetic acid, and water at a volume ratio of 1:1:15 to obtain a catalyst.

[0044] Auxiliary agent: Mix pearl powder, montmorillonite powder, and potassium chloride solution with a concentration of 0.1mol / L at a mass ratio of 1:1:5 to obtain an auxiliary agent.

[0045] Surfactant: mix sodium dodecylbenzenesulfonate and sodium laureth sulfate at a mass ratio of 4:1 to obtain a surfactant.

[0046] Solvent B: Mix potassium persulfate and absolute ethanol at a mass ratio of 1:12 to obtain solvent B.

[0047] Auxiliary material: Mix sodium carboxymethyl cellulose and microcrystalline paraffin at a mass ratio of 6:1 to obtain the auxiliary material.

[0048] Carbomer model is 934NF.

[0049] The preparation method of composite modified starch nanocrystal comprises the steps:

[0050] (1) In a water bath at 24°C, take starch a...

Embodiment 2

[0061] Solvent A: Take dichloroethane and CrO at a mass ratio of 6:0.2 3 ·(C 5 h 5 N) 2 Mix to obtain solvent A.

[0062] Catalyst: Mix sulfuric acid, acetic acid, and water at a volume ratio of 1:2:18 to obtain a catalyst.

[0063] Auxiliary agent: Mix pearl powder, montmorillonite powder, and potassium chloride solution with a concentration of 0.1mol / L at a mass ratio of 1:1.5:5 to obtain an auxiliary agent.

[0064] Surfactant: mix sodium dodecylbenzenesulfonate and sodium laureth sulfate at a mass ratio of 4:1.5 to obtain a surfactant.

[0065] Solvent B: Mix potassium persulfate and absolute ethanol at a mass ratio of 1:15 to obtain solvent B.

[0066] Auxiliary materials: Carboxymethyl cellulose sodium and microcrystalline paraffin are mixed according to the mass ratio of 6:1.5 to obtain auxiliary materials.

[0067] Carbomer model is 940NF.

[0068] The preparation method of composite modified starch nanocrystal comprises the steps:

[0069] (1) In a water bath ...

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Abstract

The invention discloses a papermaking sizing agent, and belongs to the technical field of papermaking additives. Carbomer, gum lac and the like are used as raw materials and are ultrasonically oscillated, cut and dispersed to obtain a glue solution, and the glue solution has a compositing effect with treated bamboo shoot fibers homogenate, so that a high adhesion force is provided, the bursting strength and the smoothness of the paper are greatly improved, the gum lac is high in stability and cementing effect, the solvent is good in retention capability, and the gum lac can also play a role ofsolvent stabilization and viscosity regulation in a sizing agent system; and starch is used as a raw material, the starch is oxidized by a solvent A, a carbinol structure in the starch can generate -CHO, then by virtue of the cross-linking modification of glutaraldehyde, C=O and -(CXH2)3 hydrophobic groups are introduced, by virtue of the esterification modification of acetic anhydride, a great amount of C=O is introduced into starch nano crystals, so that the hydrophobic performance can be significantly improved, and then after the sizing when in use, the water resistance and the fluid permeation resistance can be improved; and the problems that the existing papermaking sizing agent is poor in adhesion capability and poor in water resistance after the sizing can be solved.

Description

technical field [0001] The invention belongs to the technical field of papermaking additives, in particular to a papermaking sizing agent. Background technique [0002] There are a lot of capillary pores between the fibers in the paper, and the cellulose and hemicellulose that make up the fibers contain hydrophilic hydroxyl groups and other hydrophilic groups, which can absorb water or other liquids, and are written on paper made only of fibers Or when printing, the ink or ink will permeate and diffuse, causing unclear or through printing. In addition, the strength of the paper will decrease after absorbing water, which will affect the normal use of the paper. Surface sizing can make up for a series of problems caused by the extensive use of non-wood fiber and waste paper pulp in the paper industry, endow paper with excellent performance, meet the current development needs of the paper and printing industry, and also conform to the general trend of development. In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
CPCD21H21/16
Inventor 朱文杰陈建春李莉
Owner 朱文杰