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Surface modifying method for superfine paint powder

A technology of surface modification and paint powder, which is applied to the device and coating of the surface coating liquid, which can solve the problems of poor fluidity, inability to realize spraying, difficult fluidization, etc., to eliminate the agglomeration effect and avoid the defects of the sprayed coating , the effect of low production cost

Inactive Publication Date: 2004-02-04
张伟
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem of extremely poor fluidity, extremely difficult fluidization and air transport of ultra-fine paint powder due to the agglomeration effect, so that spraying cannot be realized

Method used

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  • Surface modifying method for superfine paint powder
  • Surface modifying method for superfine paint powder
  • Surface modifying method for superfine paint powder

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Embodiment Construction

[0034] figure 2 , 3 , 4, and 5 are schematic diagrams of the three most common jet mills widely used in the powder industry. figure 2 , 3 It is a flat jet mill. The material to be crushed enters through the feeding port (4), is accelerated to supersonic speed through the Venturi pushing nozzle (5) and is introduced into the crushing chamber (7). At the same time, the high-pressure airflow is sprayed into the crushing chamber from the compressed air inlet (9) through the crushing airflow nozzle (6) at a speed of hundreds of meters or even thousands of meters per second. Since the crushing air nozzle and the radius of the crushing chamber form an acute angle, the high-speed airflow ejected from the nozzle exerts a very high drag force on the particles, pushing the particles to rotate in a circular motion, resulting in strong collision and friction between the particles and between the particles and the wall of the crushing chamber. smash. The pulverized particles are entr...

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Abstract

A process for modifying the surface of superfine paint particle in order to improve the flowability of paint particles for airflow delivery features that the airflow or external mechanical force is used to make small and hard additive particles collide or squeeze with paint particles. Part of additive particles is anchored on the surface of paint particle and other additive particle is adsorbed by its exposed rest. Its advantages are high effect, low cost, and simple operation.

Description

Technical field [0001] The invention relates to the field of powder coating on metal and non-metal surfaces, in particular a technical invention that uses nanometer and micron materials to carry out surface modification treatment on ultrafine paint powder particles so as to realize ultrafine paint powder coating. The present invention can also be applied to other technical fields involving ultrafine powder operation. Background technique [0002] The surface spraying of metal products can be divided into the traditional "wet paint spraying process" and the new "powder paint spraying process" according to the spraying process. Although wet paint spraying has a thin, uniform paint film and a high surface finish. However, because it uses organic solvents as dispersants and diluents, the toxic organic solvents volatilized after spraying cause great harm to the environment. Some of these solvents also have a strong destructive effect on the ozone layer. On the other hand, the ...

Claims

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Application Information

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IPC IPC(8): B05D1/12C09D7/12
Inventor 祝京旭张辉张伟
Owner 张伟
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