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Surface sizing agent for corrugated paper as well as preparation method and application thereof

A surface sizing agent and corrugated paper technology, applied in the direction of water repellent addition, etc., can solve the problems of large amount of sizing agent, difficult to improve the grade, poor paper strength, etc., to improve the surface ring compressive strength, improve the Cobb value, The effect of accelerating the ripening speed

Active Publication Date: 2011-04-13
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2) Use waste paper instead of wood pulp, but the strength of the paper is poor and the water absorption value is high
[0005] 3) Due to the many variable factors of internal sizing, the paper quality is unstable and the grade is difficult to improve, which makes manufacturers use less or give up internal sizing and use surface sizing to make up for it has become a popular trend
[0007] However, although the current surface sizing agent can improve the ring compressive strength of corrugated paper, the amount of sizing agent is large and the cost is high.
[0008] A sizing agent disclosed in Chinese patent CN 101148842A has a fast curing speed and does not return to moisture, but it does not improve the ring compressive strength of corrugated paper much.

Method used

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  • Surface sizing agent for corrugated paper as well as preparation method and application thereof
  • Surface sizing agent for corrugated paper as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Preparation of surface sizing agent base material for corrugated paper:

[0044] In a 1000ml four-necked flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 20 grams of gelatin with a molecular weight of 10000 g / mol and 214.5 grams of deionized water, heat up to 85°C to dissolve, then cool down to 45°C. Add 2 grams of 25wt% octadecyl polyoxyethylene (15) trimethylammonium chloride aqueous solution, heat to 95 ° C, add 1.5 grams of 20wt% ammonium persulfate aqueous solution, drop the following mixed monomers: 100 grams of styrene, 3 grams of dimethylaminoethyl acrylate monochloromethane quaternary ammonium, 1 gram of N-butoxymethacrylic acid, and 20 grams of n-butyl acrylate were added in 1 hour. The reaction was maintained at 95°C for 1 hour, cooled to 35°C, pH = 2.0. Filter through a 100-mesh filter to obtain a surface sizing agent base material for corrugated paper, with a solid content of 39.9 wt%.

[0045] 2. Preparation of cati...

Embodiment 2

[0052] 1. Preparation of surface sizing agent base material for corrugated paper:

[0053]Add 50 grams of gelatin with a molecular weight of 100,000 g / mol and 808 grams of deionized water into a 2000ml four-neck flask equipped with a condenser, a dropping device, a stirrer, and a thermometer, heat up to 85°C to dissolve, and cool down to 45°C. Add 20 grams of 10wt% lauryl polyoxyethylene (20) trimethylammonium chloride aqueous solution, add 4 grams of 50wt% potassium persulfate aqueous solution, and drop the following mixed monomers: 100 grams of methyl styrene, methacrylic acid 8 grams of acyloxyethyltrimethylammonium chloride, 5 grams of divinylbenzene, and 40 grams of isooctyl methacrylate were added in 6 hours. The reaction was maintained at 40°C for 2 hours, cooled to 25°C, pH=5.85. Filter through a 100-mesh filter to obtain a surface sizing agent base material for corrugated paper, with a solid content of 20.1 wt%.

[0054] 2. Preparation of cationic additives:

[005...

Embodiment 3

[0061] 1. Preparation of surface sizing agent base material for corrugated paper:

[0062] In a 1000ml four-neck flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 35 grams of gelatin with a molecular weight of 80000g / mol and 395.3 grams of distilled water, and heat up to 85°C to dissolve. Cool down to 45°C. Add 10 grams of 10 wt% tetradecyl polyoxyethylene (8) trimethylammonium chloride aqueous solution, heat to 60 ° C, add 5 grams of 20 wt % sodium persulfate aqueous solution, and drop the following mixed monomers: 100 grams of styrene, 5 grams of diallyl dimethyl ammonium chloride, 3 grams of aminoethyl acrylate, and 30 grams of methyl methacrylate were added in 4 hours. The reaction was maintained at 60°C for 2 hours, cooled to 35°C, pH = 3.5. Filter through a 100-mesh filter to obtain a surface sizing agent base material for corrugated paper, with a solid content of 30.2 wt%.

[0063] 2. Preparation of cationic additives:

[0064] 1) ...

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Abstract

The invention provides a surface sizing agent for corrugated paper as well as a preparation method and application thereof. The surface sizing agent for the corrugated paper comprises the following components in parts by weight: 100 parts of base stocks of the surface sizing agent for the corrugated paper and 5-10 parts of cationic additives, wherein the cationic additives are emulsified materials formed by stearic acids and cationic emulsifiers. The surface sizing agent for the corrugated paper is a high-performance environmental-friendly product which can meet the requirements for surface sizing of paper sheets; the product carries out the surface sizing on raw corrugated paper with starch together, thereby not only improving the Cobb value of the corrugated paper and accelerating the curing speed, but also greatly enhancing the surface ring crush strength of the corrugated paper and reducing the using amount of the starch; and in addition, the invention can be suitable for the need of the development of the high-strength corrugated paper.

Description

technical field [0001] The invention relates to a surface sizing agent for corrugated paper and a preparation method thereof. Background technique [0002] The development trend of paper, especially corrugated paper and cardboard is as follows: [0003] 1) It is developing from high grammage to low grammage. [0004] 2) Use waste paper instead of wood pulp, but the strength of the paper is poor and the water absorption value is high. [0005] 3) Due to the unstable quality of paper caused by many variable factors in internal sizing, and the difficulty of improving the grade, it has become a popular trend for manufacturers to use less or abandon internal sizing and use surface sizing to make up for it. [0006] Requirements for the sizing agent used for the above-mentioned surface sizing: a) increase the ring compressive strength; b) greatly reduce the Cobb value (water absorption value); c) fast curing speed, and it is required to be cooked immediately after getting off th...

Claims

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Application Information

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IPC IPC(8): D21H21/16
Inventor 施晓旦尹东华王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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