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Oxidized starch paper surface sizing agent and preparation method thereof

A technology of surface sizing agent and oxidized starch, which is applied in the direction of water repellent addition, etc., can solve the problems of unstable sizing agent concentration, heavy workload, and complicated preparation process, so as to improve strength and printability and reduce paper-making Effect of fiber consumption and simplification of rubber making process

Inactive Publication Date: 2012-07-11
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, when producing offset printing paper, the surface sizing process most used is to prepare the natural polymer surface sizing agent and the synthetic polymer surface sizing agent according to a certain ratio, such as according to the weight ratio: cationic starch: Polyvinyl alcohol (PVA): surface enhancer (TSI) = 78: 16: 10, the weight percent concentration of the glue solution is 3-4%, and the sizing temperature is 50-80°C. The preparation process of this sizing agent is complicated , the workload is heavy. First, cationic starch glue and polyvinyl alcohol glue should be prepared in their respective glue barrels, and then filtered through an 80-mesh filter, and then the three glues should be put into a glue barrel according to the process requirements. Mix and prepare the surface sizing agent, then pump it to the storage tank for storage, and finally, according to the needs of the paper type, pump it to the paper machine sizing machine for sizing treatment on the paper
The sizing agent prepared by this glue-making process has many human-influenced factors, the concentration of the sizing material is unstable, and the worker's operation intensity is high. When the paper is glued, the amount of glue applied is unstable. During printing, hair loss and powder loss often occur, and the surface printing performance of the paper is poor

Method used

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  • Oxidized starch paper surface sizing agent and preparation method thereof
  • Oxidized starch paper surface sizing agent and preparation method thereof
  • Oxidized starch paper surface sizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 100 parts of cornstarch into 270 parts of sodium hydroxide solution with a pH value of 10 under stirring, soak for 0.5 hours, filter to remove slag, let stand for precipitation, and obtain precipitated starch;

[0027] Take the above-mentioned precipitated starch, add 225 parts of water, 10 parts of sulfuric acid and 2.6 parts of potassium permanganate, stir evenly, the material is brown, and after standing for 5 hours, it turns into white;

[0028] Add 20 parts of sodium hydroxide, and after stirring for 5 minutes, the material is a translucent solution;

[0029] Add 10 parts of sodium borate solution with a weight concentration of 2%, and stir for 15 minutes to obtain the surface sizing agent 1.

Embodiment 2

[0031] Add 100 parts of wheat starch into 300 parts of potassium hydroxide solution with a pH value of 10 under stirring, soak for 1.0 hour, filter to remove slag, let stand for precipitation, and obtain precipitated starch;

[0032] Take the above-mentioned precipitated starch, add 225 parts of water, 20 parts of sulfuric acid and 5.0 parts of potassium permanganate, stir evenly, the material is brown, and after standing for 2 hours, it turns into white;

[0033] Add 15 parts of solid potassium hydroxide, and after stirring for 3 minutes, the material becomes a translucent solution;

[0034] Add 5 parts of sodium borate solution with a weight concentration of 4%, and stir for 10 minutes to obtain surface sizing agent 2.

Embodiment 3

[0036] Add 100 parts of tapioca starch into 280 parts of sodium hydroxide solution with a pH value of 10 under stirring, soak for 0.6 hours, filter to remove slag, let stand for precipitation, and obtain precipitated starch;

[0037] Take the above precipitated starch and add 250 parts of deionized water, 15 parts of sulfuric acid and 3.5 parts of potassium permanganate, stir evenly, the material is brown, and after standing for 4 hours, it turns into white;

[0038] Add 15 parts of solid sodium hydroxide and stir for 4 minutes, the material becomes a translucent solution; add 8 parts of 2.5% sodium borate solution and stir for 12 minutes to obtain the surface sizing agent of the invention.

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Abstract

The invention discloses an oxidized starch paper surface sizing agent and a preparation method thereof. The preparation method comprises the following steps of: (1) adding starch into an alkali solution of which the pH value is 10, soaking, and collecting precipitated starch; (2) adding water, sulfuric acid and an oxidant solution into the precipitating starch, stirring, and standing for 2-5 hours; (3) adding a solid alkali, and stirring for 5-10 minutes; and (4) adding a sodium borate solution, and stirring to obtain the oxidized starch paper surface sizing agent. In the preparation method, oxidized starch is taken as a surface sizing agent, so that the problems of hair falling and powder falling are solved, the paper forming fiber consumption is lowered, a glue making process is simplified, the labor intensity is lowered, and the surface strength and printing suitability of paper can be enhanced.

Description

technical field [0001] The invention relates to a paper surface sizing agent and a preparation method thereof. Background technique [0002] There are many types of surface sizing agents used in the paper industry, which can be classified according to the source of chemicals: natural polymer surface sizing agents and synthetic polymer surface sizing agents. The more commonly used surface sizing agents are: (1) Natural polymer surface sizing agents Sizing agent: cationic starch, anionic phosphate starch, hydrogen alkyl starch, dialdehyde starch, acetate starch, enzyme-converted starch, acid-thinned starch, animal glue, modified cellulose, alginate, etc.; (2 ) Synthetic polymer surface sizing agents include: polyvinyl alcohol (PVA), polyacrylamide (PAM) polyurethane, etc. [0003] At present, when producing offset printing paper, the surface sizing process most used is to prepare the natural polymer surface sizing agent and the synthetic polymer surface sizing agent according...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/18D21H21/16
Inventor 施晓旦李改霞
Owner SHANGHAI DONGSHENG NEW MATERIALS
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