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Size distribution method for micro powder

An ultra-fine powder and dispersion technology, which is applied in the direction of mixing methods, chemical instruments and methods, and dissolution, can solve the problems of secondary agglomeration, enlargement of inorganic material powder particles, and high cost of material powder to achieve dispersion modification Good effect and cost reduction effect

Inactive Publication Date: 2005-03-30
DEHAO TECH DEV TIANJIN CITY
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Problems solved by technology

[0004] However, two major problems will arise with the ultra-micronization of inorganic material powders: first, the finer the material powder, the higher the cost; second, the finer the material powder, the more serious the phenomenon of secondary agglomeration
[0005] At present, there are many kinds of ultrafine powder dispersion methods reported at home and abroad. The principle is nothing more than using heating to remove moisture to solve the problem of liquid bridge force; using mechanical and physical means to open the secondary agglomeration Particles, and then use the method of encapsulating additives to increase the distance between inorganic material powder particles to solve the problem of van der Waals force; and use various methods to remove static electricity to solve the problem of electrostatic force between inorganic particles; however, these Methods are only to a certain extent to solve the problem of agglomeration and dispersion of ultrafine powder

Method used

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Embodiment Construction

[0018] Theoretical analysis and mathematical derivation of the ultrafine powder gradation dispersion method of the present invention.

[0019] The spatial geometry of the interstices of a particle affects its overall filling characteristics to varying degrees, depending on factors such as filling type, particle shape, and particle size distribution.

[0020] (1) Bulk density ρ B It is the mass of powder per unit filling volume in a certain filling state, also known as apparent density, and the unit is kg / m 3 .

[0021] formula:

[0022]

[0023] Where: V B —Powder filling volume, m 3 ;

[0024] ρ P —The density of particles Kg / m 3 ;

[0025] ε—porosity;

[0026] (2) The filling rate ψ is the ratio of the particle volume to the powder volume under a certain filling state.

[0027] formula:

[0028]

[0029] In the formula: M—mass of filling powder.

[0030] (3) Porosity ε is the ratio of void volume to powder filling volume.

[0031] formula:

[0032] ...

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Abstract

A graded dispersion method of superfine powder uses a numbers of superfine powders in different peak value sizes to carry out mixing preparation in order to obtain optimum dispersion result of powder with peak value of 300 micron to 15 nanometre. The superfine powder material can be organic material, inorganic material or mixture of the two and the mixing-preparation can be single organic material, single inorganic material, or mixed both, two or above organic with two or above inorganic materials.

Description

technical field [0001] The invention relates to a processing method for plastic products, in particular to a method for grading and dispersing ultrafine powders that can improve the performance of plastic products and reduce costs. Background technique [0002] In the production process of plastics, rubber and other related products, it is often necessary to uniformly add inorganic material powder to the polymer. The particle size of the powder is generally around 300 mesh to 800 mesh (that is, 46 to 18 microns), mainly for filling and expansion. Production costs can be reduced to a certain extent. However, there is a certain limit to the amount of addition, because with the increase of the amount of addition, the performance of the product will drop sharply, and it will even make the product difficult to form, process and use. [0003] In recent years, with the advancement of science and technology, especially the rise and development of nanotechnology, the particle size o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/18B29B7/00
Inventor 王获蔡沐周逸奇冯丽欣
Owner DEHAO TECH DEV TIANJIN CITY
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