Wave absorbing material and forming method thereof
A technology of wave absorbing material and wave absorbing agent, applied in the field of wave absorbing material, can solve problems such as insufficient wave absorbing ability, and achieve the effect of good wave absorbing ability and mechanical properties
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[0035] Preparation method of absorbing material
[0036] Such as figure 1 As shown in step S101, use a high-speed mixer to mix the resin, and fillers including wave absorbers and reinforcing agents at room temperature to form a mixture, and the mixing time is between 30 minutes and 2 hours.
[0037] In the present invention, the resin used in step S101 may be thermosetting resin or thermoplastic resin. Thermoplastic resins that may be used in embodiments of the present invention include, but are not limited to, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polymethyl methacrylate, polyester, polyoxymethylene, polyamide, or polyphenylene oxide. one or any combination of them. Thermosetting resins that can be used in embodiments of the present invention include, but are not limited to, epoxy resins, polyester resins, epoxy resins, phenolic resins, cyanate ester resins, bismaleimide resins, melamine formaldehyde resins, furan resins, One of silicone resin or po...
Embodiment 1
[0051] At a temperature of 70°C, use a high-speed mixer to mix 140 parts of epoxy resin, 7 parts of dicyandiamide, 7 parts of ammonium acrylate, 140 parts of carbonyl iron powder and a reinforcing agent to form a mixture. The volume ratio of wave agent and strengthening agent) is 1:9, and the strengthening agent includes chopped fibers and silicon dioxide. Then use a roll coater to make a resin film from the mixture by a roll coater. Lay a layer of resin film and a layer of aramid cloth, and use an oven to cure the laminated composite, wherein the temperature is heated at 110°C for 1 hour and at 150°C for 3 hours. Finally, absorbing material is formed.
Embodiment 2
[0053] At a temperature of 70°C, use a high-speed mixer to mix 70 parts of bisphenol A cyanate, 10 parts of novolac epoxy resin, 2 parts of ammonium acrylate, 140 parts of carbonyl iron powder and fillers to form a mixture, in which the resin and The volume ratio of the filler (including wave absorbing agent and reinforcing agent) is 3.5:6.5, and the reinforcing agent includes alumina and calcium carbonate. Then use a roll coater to make a resin film from the mixture by a roll coater. Two layers of resin film and one layer of quartz cloth were laminated, and the laminated composite was cured in an oven, wherein the temperature was heated at 130°C for 1 hour and at 200°C for 3 hours. Finally, absorbing material is formed.
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