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Method for complexing composite starch sizing agent

A technology of compound starch and sizing agent, applied in the direction of adding water repellent, can solve the problem of difficult to meet the requirements of water repellency, and achieve the effects of excellent water repellency, easy industrialization and simple method

Inactive Publication Date: 2008-08-13
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starch has become the most widely used sizing agent because of its cheap price, and after starch has been modified by different treatments, such as oxidation, grafting, cationization, anionization, etherification, esterification, etc., it can meet various needs, but not enough It is difficult to meet the hydrophobicity requirements

Method used

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  • Method for complexing composite starch sizing agent
  • Method for complexing composite starch sizing agent

Examples

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Embodiment 1

[0016] A compound method for a composite starch sizing agent, comprising the steps of: preparing an aqueous solution of cornstarch with a weight concentration of 10%, heating and gelatinizing in water at 90° C. to obtain a clear cornstarch solution; then adding 10% (accounting for the weight of the starch) percent) of stearic acid (C18 fatty acid), while adjusting the pH to 8, continuing to stir and keep warm at 90°C for at least 30 minutes, so that the fatty acid is fully dissolved, and fully mixed with cornstarch to obtain a composite cornstarch sizing agent.

[0017] The above-mentioned composite cornstarch sizing agent 10% concentration (weight concentration) is directly sizing on the base paper of quantitative 100GSM, base paper Cobb (Carber water absorption value, paper sizing degree) water absorption value 1 minute 112GSM, after surface sizing 4GSM, Cobb water absorption value is only 60GSM in 1 minute. After sizing 4GSM on the surface of the original starch (uncompound...

Embodiment 2

[0019] A compound method for a composite starch sizing agent, comprising the steps of: preparing an aqueous tapioca starch solution with a weight concentration of 1%, heating and gelatinizing in water at 100° C. to obtain a clear tapioca starch solution; then adding 1% (accounting for the weight of the starch) percentage) of caprylic acid (C8 fatty acid), while adjusting the pH to 11, continue to stir and keep warm at 100°C for at least 30 minutes, so that the fatty acid is fully dissolved, and fully mixed with tapioca starch to obtain a composite tapioca starch sizing agent.

Embodiment 3

[0021] A compound method of a composite starch sizing agent, comprising the steps of: preparing an aqueous solution of potato starch with a weight concentration of 20%, heating and gelatinizing in water at 95° C. to obtain a clear potato starch solution; then adding 40% (accounting for the weight of the starch) percent) of palmitic acid (C12 fatty acid), adjust the pH to 9 at the same time, continue to stir and keep warm at 95°C for at least 30 minutes, so that the fatty acid is fully dissolved, and fully mixed with potato starch to obtain a composite potato starch sizing agent.

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Abstract

The invention discloses a composite method of a composite starch sizing agent comprising following steps: preparing starch water solution with a weight concentration of 1-20, heating and gelatinizing to preparing starch solution; adding fatty acid with a weight percentage of 1-401f starch, adjusting pH to 8-11 at the same time, continuing blending and thermal insulation to dissolve the fatty acid sufficiently, the fatty acid and starch are mixed evenly and the composite starch sizing agent is obtained. The composite starch sizing agent prepared according to the invention has excellent hydrophobicity, and overcomes shortcoming of hydrophilicity of starch paper formed after used for surface sizing. The invented method is simple, the cost thereof is low, and it is easy to be industrialized.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, in particular to a method for compounding a compound starch sizing agent used for paper surface treatment. Background technique [0002] Starch is a natural polymer water-based substance. The main industrial varieties are corn starch, tapioca starch and potato starch, which are mainly used in papermaking, textile and food industries. Among them, there are more and more applications in the paper industry, and more than half of the global consumption. For example, Europe uses an average of 22kg per ton of paper, and North America uses 12kg per ton of paper, and the amount is related to the type of paper produced. For example, corrugated paper produced from waste paper needs 60kg of modified starch per ton, and 40kg of starch per ton of office paper. In 2000, my country's paper industry used about 120,000 to 150,000 tons of modified starch, with an average of 4 to 5 kg per ton, which was 1 / 4 to 1 / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 颜进华
Owner GUANGDONG IND TECHN COLLEGE
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