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Thermoplastic wave-absorbing material and preparation method thereof

A wave-absorbing material and thermoplastic technology, applied in the field of wave-absorbing materials, can solve problems such as pollution of the environment, restrictions on the use of thermosetting wave-absorbing prepregs, and insufficient toughness

Active Publication Date: 2021-09-10
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are some unavoidable defects in the existing thermosetting absorbing materials: thermosetting absorbing materials usually need to be stored at low temperature, and the storage time is very limited; The wave composite material can only be heated and shaped once, and cannot be processed twice, and its waste cannot be recycled and reused, which not only pollutes the environment, but also causes a large waste of resources
Therefore, the use of thermosetting wave-absorbing prepregs is greatly limited

Method used

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  • Thermoplastic wave-absorbing material and preparation method thereof

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preparation example Construction

[0039] Based on the same inventive concept, the embodiment of the present application also provides a preparation method of the above-mentioned thermoplastic absorbing material, including the following steps:

[0040] S1. Put the radar absorber and thermal resin resin in a mixer and mix them evenly;

[0041] S2, placing the uniformly mixed material in a casting machine to prepare a thermoplastic wave-absorbing film;

[0042] S3. Place the thermoplastic wave-absorbing film on the upper and lower sides of the reinforced fiber cloth respectively, and prepare the thermoplastic wave-absorbing material by using a hot-pressing melt-dipping process.

[0043] In some embodiments, in the hot-press melt impregnation process, the hot-press temperature is 110°C-380°C, and the hot-press pressure is 0.3KPa-0.8KPa.

[0044] The preparation method of the thermoplastic wave-absorbing material of the present application is to prepare the thermoplastic wave-absorbing material by placing the ther...

Embodiment 1

[0047] The embodiment of the present application provides a preparation method of a thermoplastic absorbing material, comprising the following steps:

[0048] S1. Put 0.5 parts by weight of carbon nanotubes and 99.5 parts by weight of polyethylene particles into a mixer and mix them uniformly for later use;

[0049] S2. Add the homogeneously mixed materials in S1 to the casting machine, and extrude and cast to prepare a thermoplastic wave-absorbing film; wherein the temperature of each section of the screw of the casting machine is set as: T 1 =120°C, T 2 =140°C, T 3 =140℃, the coating head temperature is set to T 4 =150°C, the gap of the coating head is set to 0.12mm, the speed of the extruder is R=350r·min -1 ; After the extruded and casted film is cooled and shaped by a cooling roll, a thermoplastic wave-absorbing film with a thickness of 0.1mm is obtained; Three paragraphs, T 1 Corresponding to feeding section, T 2 Corresponding to the compressed section, T 3 Corres...

Embodiment 2

[0052] The embodiment of the present application provides a preparation method of a thermoplastic absorbing material, comprising the following steps:

[0053] S1, put 30 parts by weight of conductive carbon black and 70 parts by weight of polyvinyl chloride particles into a mixer and mix evenly, and set aside;

[0054] S2. Add the homogeneously mixed materials in S1 to the casting machine, and extrude and cast to prepare a thermoplastic wave-absorbing film; wherein the temperature of each section of the screw of the casting machine is set as: T 1 =80°C, T 2 =100°C, T 3 =120°C, the coating head temperature is set to T 4 =120°C, the gap of the coating head is set to 0.33mm, the speed of the extruder is R=300r·min -1 After the extruded and casted film is cooled and shaped by a cooling roll, a thermoplastic wave-absorbing film with a thickness of 0.3mm is obtained; Three paragraphs, T 1 Corresponding to feeding section, T 2 Corresponding to the compressed section, T 3 Corre...

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Abstract

The invention provides a thermoplastic wave-absorbing material and a preparation method thereof. The thermoplastic wave-absorbing material comprises: a reinforced fiber cloth; and thermoplastic wave-absorbing films positioned on the upper and lower side surfaces of the reinforced fiber cloth. According to the thermoplastic wave-absorbing material disclosed by the invention, the thermoplastic resin with a linear molecular structure is used as an adhesive matrix material, so that the thermoplastic wave-absorbing material has good toughness, the impact resistance and the damage tolerance of the thermoplastic wave-absorbing material can be greatly improved, and the thermoplastic wave-absorbing material can be processed and formed for multiple times and can be recycled, thereby being beneficial to environment protection and resource saving; and compared with the existing thermosetting wave-absorbing material, the thermoplastic wave-absorbing material disclosed by the invention only needs to be stored at normal temperature, and the storage period is not limited.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a thermoplastic wave-absorbing material and a preparation method thereof. Background technique [0002] The wave-absorbing composite material is a structural functional material with a certain independent load-bearing and protective capacity. The structural components made of this material can replace or partially replace the corresponding metal structure on the target body, thereby reducing the target's detection by radar. Stealth performance. Therefore, once the structural wave-absorbing material that can take into account both wave-absorbing and load-bearing appears, it shows its superiority as a radar-band stealth material used in weapons and equipment. While meeting the stealth requirements, it greatly reduces the The weight of the structure has been highly valued at home and abroad, and it has developed rapidly and entered the stage of engineering applicat...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K3/04C08K7/10C08L27/06C08K7/14C08L23/12C08L77/00C08L77/10C08K7/06C08L25/06C08L61/16
CPCC08K3/041C08K7/10C08K3/04C08K7/14C08K3/042C08L77/00C08K7/06C08K2201/001C08L23/06C08L27/06C08L23/12C08L77/10C08L25/06C08L61/16Y02P20/10
Inventor 危伟雷志鹏邹如荣周芬许可何俊甘丹胡蕙
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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