Preparation method of rubber-based flexible wave-absorbing material

A wave absorbing material and rubber-based technology, applied in the field of civil wave absorbing materials, can solve the problems of high cost and complicated process methods, and achieve the effects of low cost, wide application and improved peak intensity

Inactive Publication Date: 2014-10-15
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In recent years, with the research on the preparation technology of flexible wave-absorbing materials for rubber substrates, some achievements have been made in increasing the upper limit of the filling concentration, such as modifying the rubber substrate to enhance the coating performance of the rubber substrate; Surface treatment, improving the bonding performance of metal powder and organic rubber, etc. These methods can increase the filling concentration, but require more complicated processes and more professional equipment, and the cost is higher

Method used

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  • Preparation method of rubber-based flexible wave-absorbing material

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preparation example Construction

[0022] An embodiment of the present invention provides a method for preparing a rubber-based flexible wave-absorbing material, which includes the following steps:

[0023] A. Fill the filler and the rubber according to the mass ratio of 90:10~91:9. During the mixing process, add 1.2%-2% of the total mass of the filler and the rubber and an organic solvent compatible with the rubber for mixing. Mix the filler and rubber powder evenly;

[0024] B. After the mixing is completed, place it for a period of time at room temperature or at a temperature not higher than the ignition point of the organic solvent to evaporate the organic solvent, and then perform calendering to prepare a wave-absorbing patch.

[0025] In practical application, an open mill can be used for mixing, and the filler and rubber powder can be mixed evenly by turning over the roller, or an internal mixer can be used for mixing, and the filler and rubber powder can be mixed evenly by stirring .

[0026] Roller p...

Embodiment 1

[0032] Fill the metal powder with a particle size distribution of 30um-100um and chlorinated polyethylene rubber at a mass ratio of 90:10. During the mixing process, add toluene accounting for 1.2% of the total mass of the metal powder and chlorinated polyethylene rubber. Mixing is carried out in an open mill, and the filler and rubber powder are evenly mixed by rolling over the rubber; after the mixing is completed, it is placed at room temperature for a period of time to volatilize the toluene, and then calendered to prepare a wave-absorbing patch. In this example, after uniform mixing, the mixture can be formed into sheets, but if ferrite powder is continuously added, it cannot be formed, and the filling concentration reaches 90%.

Embodiment 2

[0034] Fill the metal powder with a particle size distribution of 30um-100um and chlorinated polyethylene rubber at a mass ratio of 90.5:9.5, and add toluene accounting for 1.5% of the total mass of the metal powder and chlorinated polyethylene rubber during the mixing process. Use an internal mixer for mixing, and mix the filler and rubber powder evenly by stirring; heat up after the mixing is completed, but the temperature is not higher than the ignition point of the organic solvent, leave it for a period of time, volatilize the toluene, and then carry out rolling. Prepared as a wave-absorbing patch. In this example, after uniform mixing, the mixture can be formed into tablets, but if the ferrite powder is continued to be added, it cannot be formed, and the filling concentration reaches 90.5%.

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Abstract

The invention discloses a method for preparing a rubber base material flexible absorbing material and relates to the field of civil absorbing materials. The method comprises the following steps of: A, filling a filler and rubber according to a mass ratio of 90:10-91:9, adding an organic solvent which accounts for 1.2-2 percent of total mass of the filler and the rubber and is soluble with the rubber in the mixing process, mixing, and uniformly mixing the filler and the rubber powder; and B, standing a period of time after the mixing is finished, volatilizing the organic solvent, and calendering to prepare an absorbing patch. According to the method, the filling concentration can be obviously improved, and the filling concentration is more than 90 percent, so that the material performance is improved; and complex chemical process control or professional auxiliary equipment is not required, and the method is convenient to operate and low in cost.

Description

technical field [0001] The invention relates to the field of civil wave-absorbing materials, in particular to a method for preparing a rubber-based flexible wave-absorbing material. Background technique [0002] Rubber-based flexible absorbing materials belong to the category of composite materials. Because the molded material has the flexibility of rubber, it is different from other rigid or inflexible materials in absorbing materials, so it is called rubber-based flexible absorbing materials. The molding method of the rubber-based flexible wave-absorbing material is as follows: filling metal powder particles into the rubber-based material, kneading them evenly, and then calendering to prepare a wave-absorbing patch. [0003] The impact of filling concentration on the absorbing performance is very important. Generally speaking, the higher the filling concentration, the stronger the absorbing ability and the better the low-frequency effect of the same thickness of the absorb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08K3/08B29B7/00
Inventor 蔡亚夫朱时霖李木银
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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