A low-defect wave-absorbing foam material and a preparation method thereof
By using core-shell structured absorbing materials and optimized PVC matrix foaming processes, the problem of insufficient frequency band coverage of existing absorbing materials has been solved, achieving efficient electromagnetic wave absorption and material stability over a wide frequency band. This technology is suitable for applications such as 5G base stations, intelligent transportation, and new energy vehicles.
CN121554894BActive Publication Date: 2026-07-24LUOYANG SIWEINUO NEW MATERIALS TECHNOLOGY CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LUOYANG SIWEINUO NEW MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2026-01-21
- Publication Date
- 2026-07-24
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Figure CN121554894B_ABST
Abstract
This application relates to the technical field of foam materials, and specifically discloses a low-defect wave-absorbing foam material and a preparation method thereof. A low-defect wave-absorbing foam material comprises raw materials in the following parts by mass: 400-600 parts of PVC resin, 350-550 parts of isocyanate, 20-40 parts of curing agent, 40-80 parts of foaming agent, 6-10 parts of crosslinking agent, 10-30 parts of plasticizer, 2-8 parts of stabilizer and 40-70 parts of wave-absorbing material; the wave-absorbing material has a core-shell structure with carboxylated carbon nanotubes as the core and modified ferrite as the shell; the modified ferrite is a ferrite containing component A and component B; the general formula of the ferrite is A x B1- x Fe2O4; the component A includes at least two variable-valence metals; the component B includes at least two non-variable-valence metals. The low-defect wave-absorbing foam material prepared by this application achieves wide-band multi-absorption valleys and high mechanical properties.
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