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Preparation of polyethyleneimine AKD new type sizing agent

A polyethyleneimine, sizing agent technology, applied in the direction of adding water repellent

Inactive Publication Date: 2010-06-23
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on emulsifying AKD with polyethyleneimine (PEI). PEI has hydrophilic and lipophilic groups, and the high positive charge density contained helps to improve the stability of the emulsion and the adhesion of the emulsion particles on the fiber. keep

Method used

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  • Preparation of polyethyleneimine AKD new type sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: the optimal condition of PEI emulsified AKD emulsion

[0010] Under the optimal emulsification conditions, the particle size and Zeta potential of the emulsified AKD emulsion are 1184nm and 52.1mV respectively, and the sizing degree of hand-made tablets can reach 68s; the particle size of the pilot emulsion is 874nm, and the potential is 52.2mV. The optimum emulsification conditions are shown in Table 1.

Embodiment 2

[0011] Embodiment 2: PEI type AKD emulsion and commercially available product performance contrast

[0012] Pilot production of polyethyleneimine type AKD emulsion, the output is half a ton. The resulting product is a white emulsion, and the results are shown in Table 2. High-pressure homogenizing equipment is used in the pilot production process, so the particle size of the obtained emulsion is smaller than that of the product produced in the laboratory. The polyethyleneimine emulsified AKD sizing agent has a small particle size, and the Zeta potential of the colloidal particles is higher than that of the commercially available sizing agent, which makes it easier to stay on the fiber. This is also the reason for the fast curing rate of the PEI emulsified sizing agent The reason for the high degree of sizing.

[0013] The optimal condition of table 1 PEI emulsified AKD emulsion

[0014]

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PUM

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Abstract

The invention relates to a PEI emulsifying type AKD sizing agent prepared by emulsifying AKD wax powder by taking polyethyleneimine as emulsifiers, the emulsifying process condition is optimized and the pilot scale test and sizing application test are carried out; experimental result expresses that when the mass ratio of the polyethyleneimine : AKD wax powder is 1:6, the pH is 3, the emulsifying temperature is 70 DEG C, the emulsifying time is 10min, and the particle size of the AKD emulsion and Zeta electric potential are 1184nm and +52.1mV respectively; when the using amount of the AKD emulsion is 0.2 percent, handsheet sizing degree can achieve 68s, the sizing curing rate is 11.87 percent and 87.43 percent respectively after natural airing and off-machine are carried out; compared with the cationic starch sizing product, the polyethyleneimine AKD new type sizing agent has the characteristics of rapid curing and high sizing degree.

Description

Technical field: [0001] The invention uses polyethyleneimine (PEI) as emulsifier to emulsify AKD wax powder to prepare PEI emulsified AKD sizing agent, optimizes emulsification process conditions, and conducts pilot test and sizing application investigation. Compared with cationic starch type sizing products, polyethyleneimine type AKD sizing agent has the characteristics of fast curing and high sizing degree. Background technique: [0002] With the development of medium-alkaline papermaking technology, AKD, as a reactive medium-alkaline sizing agent, has the advantages of high sizing efficiency and less dosage, and has been widely used in papermaking. Traditional AKD emulsion uses cationic starch as emulsifier and stabilizer, but the retention rate of this emulsion on fiber is low, the reaction with fiber is slow, and the sizing and curing time is long. The research and development of AKD new special emulsifier has become the focus of paper researchers. [0003] There are...

Claims

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Application Information

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IPC IPC(8): D21H21/16
Inventor 陈夫山王尚玲王松林刘丹凤
Owner QINGDAO UNIV OF SCI & TECH
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