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A kind of thermoplastic absorbing material and preparation method thereof

A wave-absorbing material and thermoplastic technology, applied in the field of wave-absorbing materials, can solve the problems of limited use of thermosetting wave-absorbing prepregs, non-recyclable waste, limited storage time, etc., to achieve improved damage tolerance, good toughness, The effect of high production efficiency

Active Publication Date: 2022-06-03
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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  • A kind of thermoplastic absorbing material and preparation method thereof

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preparation example Construction

[0039] Based on the same inventive concept, an embodiment of the present application also provides a method for preparing the above-mentioned thermoplastic wave absorbing material, comprising the following steps:

[0040] S1. Put the radar absorber and the 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, the thermoplastic wave absorbing film is placed on the upper and lower sides of the reinforcing fiber cloth respectively, and a thermoplastic wave absorbing material is prepared by a hot-pressing melt impregnation process.

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

[0044] For the preparation method of the thermoplastic wave absorbing material of the present application, the thermoplastic wave absorbing film is ...

Embodiment 1

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

[0048] S1, the carbon nanotubes of 0.5 weight parts and the polyethylene particles of 99.5 weight parts are dropped into the mixer and mixed, for subsequent use;

[0049] S2, adding the uniformly mixed material in S1 into the casting machine, and extruding and casting to prepare a thermoplastic wave-absorbing film; wherein the temperature of each section of the casting machine screw is set as: T 1 =120℃, T 2 =140℃, T 3 =140℃, the temperature of the coating head is set to T 4 =150℃, the gap of the coating head is set to 0.12mm, the speed of the extruder is R=350r·min -1 ; After the film of extrusion casting is cooled and shaped by a cooling roller, a thermoplastic wave-absorbing film with a thickness of 0.1 mm is obtained; It should be pointed out that the screw of the casting machine in the embodiment of the application...

Embodiment 2

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

[0053] S1, the conductive carbon black of 30 parts by weight and the polyvinyl chloride particles of 70 parts by weight are dropped into the mixer and mixed, for subsequent use;

[0054] S2, adding the uniformly mixed material in S1 into the casting machine, and extruding and casting to prepare a thermoplastic wave-absorbing film; wherein the temperature of each section of the casting machine screw is set as: T 1 =80℃,T 2 =100℃, T 3 =120℃, the temperature of the coating head is set to T 4 =120℃, the gap of the coating head is set to 0.33mm, the speed of the extruder is R=300r·min -1 ; After the film of extrusion casting is cooled and shaped by a cooling roller, a thermoplastic wave-absorbing film with a thickness of 0.3 mm is obtained; It should be pointed out that the screw of the casting machine in the embodiment of t...

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Abstract

The invention provides a thermoplastic wave-absorbing material and a preparation method thereof. The thermoplastic wave-absorbing material comprises: reinforced fiber cloth; and a thermoplastic wave-absorbing film, which is located on the upper and lower sides of the reinforced fiber cloth. The thermoplastic wave-absorbing material of the present invention uses a thermoplastic resin with a linear molecular structure as an adhesive matrix material, has good toughness, and can greatly improve the impact resistance and damage tolerance of the thermoplastic wave-absorbing material, and the thermoplastic wave-absorbing material also has It can be processed and shaped many times, and can also be recycled, which is beneficial to protect the environment and save resources; compared with the existing thermosetting absorbing materials, the thermoplastic absorbing materials only need to be stored at room temperature, and the storage period is not as long as limit.

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 bearing and protection capacity. Stealth performance. Therefore, once the structural wave absorbing material that can take into account both wave absorption and load bearing appears, it shows its superiority as a radar band stealth material in weapon equipment. The weight of the structure has been highly valued at home and abroad, and has developed rapidly and entered the stage of engineering application. [0003] The difference between the absorbing composite material and the ordinary composite material is that a certain proportion of radar absorbing agent needs to be mixed into the material layer. Only when the radar absorbing agent can be quantitatively an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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