Radome material and preparation method thereof

A radome and fiber cloth technology, applied in the field of radome materials and their preparation, can solve the problems of high cost and high processing cost of composite materials, and achieve the effects of light weight, reduced raw material usage and cost, and long service life

Active Publication Date: 2019-09-10
西安安聚德纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In fact, DSM has already used UHMWPE fiber as the radome material. The dielectric constant of Dyneema ST17 is much lower than that of quartz, and the loss tangent is similar to that of quartz. The biggest obstacle to the application of 5G radome is cost, which is different from PC and 4G radome. Compared with the cost of FRP raw materials, the cost is 5 or 6 times higher. Compared with PC injection molding, the processing cost of composite materials is also higher, especially the process cost of using prepreg is higher.

Method used

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  • Radome material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The radome made of the radome material provided by the present invention has a bulletproof function, and the above-mentioned radome adopts a single-layer or multi-layer structure of ultra-high molecular weight polyethylene fiber braided preform and modified polyethylene film thermocompression forming, dielectric The constant is less than 2.6, the loss factor is below 0.005, the tensile strength is greater than 100MPa, and the tensile modulus is greater than 10GPa. The thickness of the wave-transmitting surface of the above-mentioned radome is less than 3mm, and the thickness of the more common radome is less than 2mm. Even a radome with a thickness of 0.5mm can withstand the stress of outdoor applications. Adopting the radome material provided by the present invention to make the wave-transmitting performance of the radome and 2mm thick, the wave-transmitting performance of the radome made by the polycarbonate of 2.9 and the 2mm thick, the dielectric constant being the p...

Embodiment 2

[0057] On the basis of Example 1, this example illustrates the synthesis method of a specific high-hardness silicone resin.

[0058] In a three-necked flask, add 5mol of trimethoxyphenylsilane, 0.25mol of dimethoxyphenylmethylsilane, 0.12mol of tetraethoxysilane, and 0.2mol of phenyl cage silsesquioxane, and 2 liters of methyl isobutyl ketone (MIBK), turn on the mechanical stirrer, dropwise add 360 g of 0.5 mol hydrochloric acid aqueous solution, control the temperature below 40 ° C, then carry out hydrolysis condensation under the conditions of rapid stirring and heating to reflux, and hydrolyze 2 After 1 hour, the temperature was raised to 60°C, and the reaction was continued for 5 hours. The reaction solution was poured into a separatory funnel, allowed to stand for stratification, and the water layer was separated. The oil layer was washed with water until neutral, and 1M potassium hydroxide was added to the reaction solution. Methanol solution, the quality of the above 1M...

Embodiment 3

[0061] Using 0.25mm thick plain weave ultra-high molecular weight polyethylene fiber cloth, its surface density is about 120g / m 2 , the ultra-high molecular weight polyethylene fiber cloth is treated with the same 5% high-hardness silicone resin solution in Example 2, and the processing method is to immerse the fiber cloth in the solution for 2 to 5 minutes, take it out, and place it at a temperature of 80° C. Dry in the oven. The ultra-high molecular weight polyethylene fiber cloth after the high-hardness silicone resin has been shaped can be accurately cut into the desired shape, and the required 0.12mm thick polyethylene film is cut into the same shape as the ultra-high molecular weight polyethylene fiber cloth, and arranged in sequence number overlap, see figure 2 , the structure from bottom to top is: the bottom layer is 0.03mm polycarbonate protective film, the first layer of polyethylene film, then alternately arrange fiber cloth and polyethylene film, and the top lay...

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Abstract

The invention provides a radome material and a preparation method thereof. A radome is prepared by using an ultrahigh-molecular weight polyethylene fiber composite material, and the mechanical properties of the radome are superior to the mechanical properties of commonly used glass fiber and aramid fiber on the premise of the same thickness. The ultrahigh-molecular weight polyethylene fiber has ahigh main chain orientation degree and high crystallinity, the strength of the ultrahigh-molecular weight polyethylene fiber is the highest among currently used fiber, and the ultrahigh-molecular weight polyethylene fiber has the advantages of high modulus, high UV resistance, high resistance to chemical corrosion, resistance to low temperature, a long service life, impact resistance, cutting resistance, high toughness and the like. The radome material has a lower thickness than that of an existing radome material under the same mechanical requirements, and the cost of the material is reducedon the premise of reduction of the use amount of the raw material; and the preparation method of the radome material has simple molding process equipment, mature technologies and a high production speed, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave transparent materials, and in particular relates to a radome material and a preparation method thereof. Background technique [0002] There are many types of radomes, ranging from radar and communication antenna radomes used on various weapon platforms to mobile phone base stations. There are a large number of mobile phone base stations, and more than millions of them are in use in the world. With the advent of the 5G era, The number of base stations is on the order of tens of millions, and the frequencies transmitted by the base stations are wider and higher. Since there are multiple antennas in the radome, the radome is also larger. The highest frequency of the existing 5G antenna is about 6GHz, and in the future, microwave will enter the frequency band of millimeter wave exceeding 20GHz. When the electromagnetic wave passes through the radome, there must be loss. The higher the fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L83/04B29C70/34B29C70/44
CPCC08L23/06B29C70/342B29C70/443C08L2205/025C08L2207/062C08L2205/16C08L2205/03C08L83/04
Inventor 邓超然张亚妮
Owner 西安安聚德纳米科技有限公司
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