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Method for Pretreatment of Aluminum Oxide Powder

A technology of alumina powder and pretreatment, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of low ink absorption capacity and high chemical cost, and achieve strong ink absorption capacity, vivid colors, and The effect of gloss

Active Publication Date: 2015-09-02
FORTUNA IMATEK QINGDAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned defects existing in the prior art field, the purpose of the present invention is to provide a method for pretreatment of alumina powder, which solves the problem of low ink absorption ability of aluminum products in the prior art and high chemical cost. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] At room temperature, add 0.1 part of sodium hydroxide to 500 parts of water, stir for 10 minutes until the sodium hydroxide is completely dissolved, then add 100 parts of alumina powder and 100 parts of isopropanol to the sodium hydroxide solution in turn, In the process, the linear velocity of the dispersing disc is greater than 25m / s and high-speed shearing is performed for 1 hour, and the aluminum oxide dispersion is obtained after standing for 24 hours.

[0009] After inspection, the ink absorption rate of the product made by using the above-mentioned pretreated alumina powder is as high as 90%, and the glossiness is 50%.

Embodiment 2

[0011] At room temperature, add 1 part of sodium hydroxide to 500 parts of water, stir for 10 minutes until the sodium hydroxide is completely dissolved, then add 100 parts of alumina powder and 100 parts of isopropanol to the sodium hydroxide solution in sequence, In the process, the linear velocity of the dispersing disc is greater than 25m / s and high-speed shearing is performed for 1 hour, and the aluminum oxide dispersion is obtained after standing for 24 hours.

[0012] After inspection, the ink absorption rate of the product made by using the above-mentioned pretreated alumina powder is as high as 91%, and the glossiness is 50.

Embodiment 3

[0014] At room temperature, add 0.5 parts of potassium hydroxide to 500 parts of water, stir for 10 minutes until the sodium hydroxide is completely dissolved, then add 100 parts of alumina powder and 100 parts of isopropanol to the sodium hydroxide solution in sequence, In the process, the linear velocity of the dispersing disc is greater than 25m / s and high-speed shearing is performed for 1 hour, and the aluminum oxide dispersion is obtained after standing for 24 hours.

[0015] After inspection, the ink absorption rate of the product made by using the above-mentioned pretreated alumina powder is as high as 90%, and the glossiness is 51.

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Abstract

The invention discloses a pretreatment method of an aluminum oxide powder. The method is as below: adding sodium hydroxide or potassium hydroxide or lithium hydroxide into water at room temperature, stirring for 10 min until complete dissolution of sodium hydroxide; then successively adding aluminum oxide powder and isopropanol into the sodium hydroxide solution; carrying out high-speed shearing with scattered disk linear speed greater than 25 m / s for 1 h in a dispersion machine; and standing for 24 h to obtain an alumina dispersion. Highly basic sodium hydroxide, potassium hydroxide or lithium hydroxide is employed for the pretreatment of the aluminum oxide powder to remove free metal aluminum ions in alumina; the alumina coating gains improved compatibility on RC paper and stronger ink absorption ability; and the coated product shows stronger gloss and more realistic color.

Description

technical field [0001] The invention belongs to the technical field of photographic paper, and in particular relates to a method for pretreating alumina powder. Background technique [0002] Technically, RC waterproof high-gloss photo paper is roughly divided into two categories: silicon-based and aluminum-based: silicon-based refers to the use of silicon dioxide as inorganic particles to absorb ink, while aluminum-based uses gama alumina. Aluminum-based products are widely promoted and recognized due to their superior printing performance and color reproduction, but the aluminum oxide coated with existing aluminum-based products is used directly without pretreatment, and the ink absorption capacity is low due to the presence of free metal aluminum ions Resulting in higher chemical costs. Contents of the invention [0003] In order to overcome the above-mentioned defects existing in the prior art field, the purpose of the present invention is to provide a method for pretr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/06
Inventor 何君勇许磊赵从兆
Owner FORTUNA IMATEK QINGDAO