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Preparation method of epoxy resin surface sizing agent and surface sizing technology

A technology of surface sizing agent and epoxy resin, which is applied in the direction of water repellent addition, etc., can solve the problems of low strength and low stiffness of low basis weight paper, and achieve the effects of improving tensile index, reducing pollution and improving application efficiency

Inactive Publication Date: 2012-10-17
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to use water-based bisphenol A epoxy resin as the surface sizing agent to provide a reasonable surface sizing process to solve the shortcomings of low stiffness and low strength of low-weight paper, so as to improve the application of the sizing agent Efficiency, increased strength, reduced pollution, and reduced costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] 1. Proportion and amount of water-based epoxy resin surface sizing agent:

[0024] Oxidized starch 4.0%, epoxy resin 0.30%, epoxy resin curing agent 0.27%, distilled water 95.4%. Surface sizing amount 1.5g / m 2 .

[0025] 2. Paper surface sizing

[0026] (1) Gelatinization of oxidized starch: Accurately weigh 4.0 g of oxidized starch, add 96 g of water into a four-medium flask, and stir evenly. Heat in a water bath from room temperature to 90°C at 3°C / min, keep warm for 15 minutes, then cool down to about 50°C for use.

[0027] (2) Preparation of water-based epoxy resin system: accurately weigh 2.0 g of water-based epoxy resin and 1.8 g of epoxy resin curing agent and mix and stir evenly.

[0028] (3) Preparation of surface sizing agent: Weigh 25.0 g of gelatinized oxidized starch with a mass fraction of 4%, and 0.238 g of epoxy resin system in a beaker and stir evenly for surface sizing.

[0029] (4) Surface sizing: lay the base paper on a horizontal glass plate, f...

example 2

[0031] 1. Proportion and amount of water-based epoxy resin surface sizing agent:

[0032] Oxidized starch 6.0%, epoxy resin 0.45%, epoxy resin curing agent 0.41%, distilled water 93.1%. Surface sizing amount 1.0g / m 2 .

[0033] 2. Paper surface sizing

[0034] (1) Gelatinization of oxidized starch: Accurately weigh 6.0 g of oxidized starch, add 94 g of water into a four-medium flask, and stir evenly. Heat in a water bath from room temperature to 90°C at 3°C / min, keep warm for 15 minutes, then cool down to about 50°C for use.

[0035] (2) Preparation of water-based epoxy resin system: accurately weigh 2.0 g of water-based epoxy resin and 1.8 g of epoxy resin curing agent and mix and stir evenly.

[0036] (3) Preparation of surface sizing agent: Weigh 16.67 g of gelatinized oxidized starch with a mass fraction of 6.0%, and 0.238 g of epoxy resin system in a beaker and stir evenly for surface sizing.

[0037] (4) Surface sizing: lay the base paper on a horizontal glass plate...

example 3

[0039] 1. Proportion and amount of water-based epoxy resin surface sizing agent:

[0040] Oxidized starch 4.0%, epoxy resin 0.44%, epoxy resin curing agent 0.40%, distilled water 95.2%. Surface sizing amount 1.5g / m 2 .

[0041] 2. Paper surface sizing

[0042] (1) Gelatinization of oxidized starch: Accurately weigh 6.0 g of oxidized starch, add 94 g of water into a four-medium flask, and stir evenly. Heat in a water bath from room temperature to 90°C at 3°C / min, keep warm for 15 minutes, then cool down to about 50°C for use.

[0043] (2) Preparation of water-based epoxy resin system: accurately weigh 2.0 g of epoxy resin and 1.8 g of water-based epoxy resin curing agent, mix and stir evenly.

[0044] (3) Preparation of surface sizing agent: Weigh 25.0 g of gelatinized oxidized starch with a mass fraction of 4.0%, and 0.352 g of epoxy resin system in a beaker and stir evenly for surface sizing.

[0045] (4) Surface sizing: lay the base paper on a horizontal glass plate, fi...

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Abstract

The invention relates to a preparation method of an epoxy resin surface sizing agent and a surface sizing technology. A bisphenol-A epoxy resin contains a lot of phenyl groups, epoxy groups and isopropyl groups. Through use of the bisphenol-A epoxy resin, the epoxy resin surface sizing agent has good rigidity and reactivity. The preparation method comprises that an aqueous bisphenol-A epoxy resin, an epoxy resin curing agent and oxidized starch are prepared into the epoxy resin surface sizing agent according to a certain ratio. The preparation method and the surface sizing technology concretely comprise the following steps of gelatinization of oxidized starch, preparation of an epoxy resin system, preparation of a surface sizing liquid, and surface sizing of a paper. In surface sizing of a paper, through use of the epoxy resin surface sizing agent, tensile indexes, surface strength and stiffness of the paper can be improved and fluff-falling and powder-falling are avoided.

Description

1. Technical field: [0001] The invention belongs to the field of paper surface sizing, and mainly relates to the preparation of an epoxy resin surface sizing agent and its surface sizing process. 2. Background technology: [0002] Reducing paper weight can save forest resources, reduce energy consumption and three waste treatment costs, protect the environment, and reduce transportation costs, storage space, and labor intensity of delivery operations. In the structure of paper products, coated and uncoated printing papers containing mechanical pulp, including newsprint, low-weight coated paper, telephone number thin paper, dictionary paper, etc. are all developing in the direction of low-weight. However, reducing the weight of paper will reduce the bonding strength between fibers, paper thickness, and reduce the gas-solid optical contact area inside the paper, resulting in a decrease in paper strength, increasing the number of paper interruptions in the production and printi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/52
Inventor 戴红旗李媛媛万丽皮成忠邢洁芳
Owner NANJING FORESTRY UNIV
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