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Emulsifying method for sizing agent

A sizing agent and gelatinization technology, which is applied in the field of papermaking, can solve the problems of large starch consumption, high process cost, and influence on the wide application of sizing agent, and achieve the effect of reducing process cost and improving flexibility and applicability

Active Publication Date: 2018-08-21
GUANGXI JINGUI PULP PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the finished starch is directly purchased during emulsification, because the composition and performance parameters of the finished starch are limited, it often cannot meet the needs of the emulsification process, and the amount of starch used during emulsification is large, and the process cost is high, which affects the wide application of sizing agents.

Method used

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  • Emulsifying method for sizing agent
  • Emulsifying method for sizing agent
  • Emulsifying method for sizing agent

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0056] Weigh 10Kg of cassava raw starch and feed it to the silo by driving, add clear water to dissolve and dilute to 40% concentration, and then transfer it to the reaction tank; put the etherification agent with a ratio of 28% relative to the original starch and NaOH with a ratio of 30% relative to the etherification agent on-line After mixing evenly, put it into the reaction tank; the starch in the reaction tank uses a heat exchanger to exchange heat, so that the starch solution in the reaction tank is heated to 45-50 ° C in a circular manner, and the pH of the starch solution is continuously monitored at about 11-11.5, and the reaction is 8-12 hours; After diluting the reacted starch to a concentration of 8%, the starch is cooked by a cooker, and the cooking temperature is controlled to be 130° C., and the cooking pressure is 2KPa, so that the starch is completely gelatinized. After the cooking is completed, it is transferred to the starch storage tank. Use a filter to filt...

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Abstract

The invention discloses an emulsifying method for a sizing agent, and relates to the technical field of papermaking. The method comprises the following steps: preparing raw starch size; adding alkaliliquor and a cationic etherifying agent into the raw starch size, and carrying out an etherification reaction so as to obtain cationic starch size; stewing the cationic starch size so as to gelatinizecationic starch; and adding the gelatinized cationic starch into a sizing agent solution so as to emulsify the sizing agent. Thus, the emulsifying method provided by the invention can reduce the costof an emulsifying process, and improves the applicability of the emulsifying process.

Description

technical field [0001] The present application relates to the technical field of papermaking, in particular to an emulsification method of a sizing agent. Background technique [0002] With the needs of people and the development of papermaking technology, there are various types of paper in life, such as household paper, printing paper, packaging paper, etc., and different types of paper have different properties. Sizing the surface of paper is a common treatment method to improve the performance of paper. Surface sizing can reduce the phenomenon of lint and powder on the paper and improve the surface strength of the paper. At the same time, it can effectively improve the folding resistance, water resistance and tensile strength of the paper. Strength, stiffness and smoothness, reduced air permeability, improved printing performance, etc., significantly improve the quality grade and use value of paper. [0003] In the long-term research and development process, the invento...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16C08B31/12D21H17/29
CPCC08B31/125D21H17/29D21H21/16
Inventor 吴明明李洪春余龙彪徐永祥陈宗鑫周示
Owner GUANGXI JINGUI PULP PAPER
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