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Wave-transmitting material for millimeter-wave radome and forming method thereof

A technology of millimeter-wave antennas and wave-transparent materials, which is applied to antennas, antenna components, chemical instruments and methods, etc., can solve problems such as low production efficiency, high dielectric constant and loss, poor weather resistance and flame retardancy, and achieve simplification Effects of production and processing steps, reduction of manufacturing costs, and excellent flame retardant properties

Active Publication Date: 2019-12-06
SHANGHAI ALLIED PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the thermoplastic resin of the skin material is polyolefin, thermoplastic polyester, and polyamide, wherein the polyolefin material has poor weather resistance and flame retardancy. Although it can improve the weather resistance and flame retardancy after modification, it is brittle. At the same time, the dielectric constant and loss of the material will become larger; thermoplastic polyester materials also have low flame retardancy, and the material itself has a higher dielectric constant and loss; while polyamide materials have higher dielectric constant and loss, and the water absorption rate is also lower. Higher, low flame retardancy; other thermoplastic materials such as PPS, PPO, etc. or brittle, or high cost, are not suitable for outdoor radome products
In addition, the core foam material in this method is still a thermosetting foam, and the production efficiency is low

Method used

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  • Wave-transmitting material for millimeter-wave radome and forming method thereof
  • Wave-transmitting material for millimeter-wave radome and forming method thereof

Examples

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Effect test

Embodiment 1

[0037] A wave-transparent material for a millimeter-wave radome, which consists of an upper skin 1, a core layer 2, and a lower skin 3, wherein the upper and lower skins are respectively bonded to the core layer by a first adhesive 4 and a second adhesive 5 tied together. Its preparation method is:

[0038] Step (1). Lay polyethersulfone film, continuous glass fiber woven cloth, and polyethersulfone film in the mold of the hot press in sequence, and control the mass percentage of fiber and polyethersulfone resin to 20:80. Hot pressing within the temperature range to obtain a 0.1mm thick fiber-reinforced polyethersulfone resin composite material as the upper and lower skin layers;

[0039] Step (2). Lay the lower skin, acrylic resin adhesive, 3mm thick core layer, acrylic resin adhesive, and upper skin in sequence in the mold, and preheat to 200-240°C; the adhesive Thickness 0.05mm, core layer density is 30kg / m 3 Polyethersulfone closed-cell micro-foaming material;

[0040]...

Embodiment 2

[0042] A wave-transparent material for a millimeter-wave radome, which consists of an upper skin 1, a core layer 2, and a lower skin 3, wherein the upper and lower skins are respectively bonded to the core layer by a first adhesive 4 and a second adhesive 5 tied together. Its preparation method is:

[0043] Step (1). Add polyethersulfone resin and continuous quartz fiber to the sheet extruder, melt and extrude the sheet in the temperature range of 300-390°C, and control the content of fiber and polyethersulfone resin to 70% by mass: 30. Obtain a 2mm thick fiber-reinforced polyethersulfone resin composite material as the upper and lower skin layers;

[0044] Step (2). Lay the lower skin, polyurethane resin adhesive, 2mm thick core layer, polyurethane resin adhesive, and upper skin in the mold in sequence, and preheat to 200-240°C; the adhesive Thickness 0.2mm, core layer density is 40kg / m 3 Polyethersulfone closed-cell micro-foaming material;

[0045] Step (3). Hot-press mo...

Embodiment 3

[0047] A wave-transparent material for a millimeter-wave radome, which consists of an upper skin 1, a core layer 2, and a lower skin 3, wherein the upper and lower skins are respectively bonded to the core layer by a first adhesive 4 and a second adhesive 5 tied together. Its preparation method is:

[0048]Step (1). Add the polyethersulfone resin to the casting machine, melt and cast the resin to form a film in the temperature range of 340-390 ° C, and introduce the aramid fiber mat into the die head of the casting machine, and the die head The extruded molten polyethersulfone resin is infiltrated, rolled, cooled, and the mass percentage of the fiber and polyethersulfone resin is controlled to be 60:40 to obtain a 0.3mm thick fiber-reinforced polyethersulfone resin composite material as the upper and lower skin layers;

[0049] Step (2). Lay the lower skin, epoxy resin adhesive, 1mm thick core layer, polyurethane resin adhesive, and upper skin in the mold in sequence, and pre...

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Abstract

The invention belongs to the technical field of manufacturing of communication radome materials, and particularly relates to a wave-transmitting material for a millimeter wave radome and a forming method thereof. A polyethersulfone resin material is adopted as a skin layer, a polyether sulfone foam material is adopted as a core layer, and the skin layer and the core layer are both made of the samethermoplastic material which is easy for machine shaping; and the polyethersulfone material has excellent flame retardant properties, and the flame retardant grade of the polyethersulfone material can reach the UL94-V0 grade. When a thermosetting material or a conventional thermoplastic material is used as a wave-transmitting material in the prior art, a flame retardant is added to improve the flame retardant property of the material, but the addition of the flame retardant seriously influences the dielectric properties of the material, so the problem of reduction in wave-transmitting rate ofthe material occurs; and the wave-transmitting material provided by the invention overcomes the above-mentioned problem and can maintain excellent wave-transmitting performance on the premise of meeting flame-retardant requirements.

Description

technical field [0001] The invention belongs to the technical field of communication radome material manufacturing, and in particular relates to a wave-transparent material for a millimeter-wave radome and a forming method thereof. Background technique [0002] In 5G millimeter wave communication base stations, due to the short wavelength of millimeter waves, the material type of the radome has a great influence on the antenna signal. Therefore, the material structure of the millimeter-wave radome is mostly a sandwich structure composite material, such as a foam sandwich structure composite material or a honeycomb sandwich structure composite material. [0003] The skin layer of the traditional foam sandwich structure composite material radome is generally a fiber-reinforced thermosetting resin material, and the core layer is generally a thermosetting rigid foam, such as PMI foam. The thermosetting resin material used for the skin layer has problems such as complex molding ...

Claims

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Application Information

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IPC IPC(8): B32B27/28B32B27/20B32B7/12B32B27/06B32B33/00H01Q1/42B29C43/58B29C48/92
CPCB29C43/58B29C2043/5816B29L2031/3456B32B5/18B32B7/12B32B27/065B32B27/08B32B27/20B32B27/286B32B33/00B32B2250/24B32B2262/0269B32B2262/10B32B2262/101B32B2266/0214B32B2266/08B32B2307/3065B29C48/92B29C2948/92704H01Q1/424
Inventor 袁角亮
Owner SHANGHAI ALLIED PLASTIC IND
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