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Wave-absorbing adhesive film and preparation method thereof

A technology of adhesive film and adhesive film layer, which is applied in the field of wave-absorbing materials, can solve the problems of complex wave-absorbing film process and poor matrix strength of wave-absorbing film, so as to reduce the number of processes, reduce the difficulty of operation, and enhance the bonding performance Effect

Pending Publication Date: 2022-03-01
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the process of preparing the wave-absorbing adhesive film by the existing method is relatively complicated, additional adhesives need to be applied during the construction process, and the base strength of the prepared wave-absorbing adhesive film is relatively poor. In view of the defects in the prior art, Provided is a wave-absorbing adhesive film and a preparation method thereof

Method used

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  • Wave-absorbing adhesive film and preparation method thereof
  • Wave-absorbing adhesive film and preparation method thereof
  • Wave-absorbing adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In this example, the wave-absorbing adhesive film is prepared by the following method, and the structure of the prepared wave-absorbing adhesive film is as follows figure 1 Shown: including absorbing layer 1, reinforcing layer 2, adhesive film layer 3, and backing 4. The specific preparation process is as follows figure 2 , image 3 and Figure 4 shown.

[0062] (1) Put 3180 epoxy resin into the open mill and masticate for 5 minutes, the temperature of the open mill is set to 50°C, the speed of the front roll is set to 18rpm, and the speed of the back roll is set to 12rpm;

[0063] (2) Load glass fiber fabric / 3180 resin prepreg with PET release layer and PET release film (release layer) into the calender, place the prepreg and release film oppositely, Add the 3180 resin matrix plasticized in step (1), set the temperature of the calender to 80°C, the roller speed of the calender to 2m / min, and set the gap between the two rollers to 0.35mm, and calender to obtain a ...

Embodiment 2

[0068] In this example, the wave-absorbing adhesive film was prepared by the following preparation method

[0069] (1) Put 3180 epoxy resin into the open mill and masticate for 10 minutes, the temperature of the open mill is set to 100°C, the speed of the front roll is set to 16rpm, and the speed of the back roll is set to 10rpm;

[0070] (2) Load the carbon fiber textile / 3180 resin prepreg with PET release layer and PET release film into the calender, place the prepreg and the release film opposite, and add in step (1) The plasticized 3180 resin matrix, the temperature of the calender is set to 70°C, the roller speed of the calender is 7m / min, and the gap between the two rollers is set to 0.38mm, and calendered to obtain an intermediate with a backing, an adhesive film layer, and a reinforcing layer ;

[0071] (3) Mix the wave-absorbing slurry evenly in a reaction kettle equipped with a stirring paddle, and the specific content is:

[0072] Methanol 60%, ZH-40 magnetic abso...

Embodiment 3

[0075] In this example, the wave-absorbing adhesive film was prepared by the following preparation method

[0076] (1) Put 3180 epoxy resin into the open mill and masticate for 40 minutes, the temperature of the open mill is set to 20°C, the speed of the front roll is set to 16rpm, and the speed of the back roll is set to 10rpm;

[0077] (2) Load the aramid fiber textile / 3180 resin prepreg and PET release film with PET release layer into the calender, place the prepreg and release film oppositely, add step (1) The 3180 resin matrix that has been plasticized in ) is set at 100°C for the calender, the roller speed of the calender is 5m / min, and the gap between the two rollers is set at 0.35mm. Intermediate;

[0078] (3) Mix the wave-absorbing slurry evenly in a reaction kettle equipped with a stirring paddle, and the specific content is:

[0079] Toluene 50%, conductive carbon black 22.5%, 3180 resin 22.5%, fatty alcohol polyoxyethylene ether 5%;

[0080] (4) Lay the intermed...

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Abstract

The invention relates to the technical field of wave-absorbing materials, in particular to a wave-absorbing adhesive film and a preparation method thereof.The wave-absorbing adhesive film comprises at least one of a reinforcing layer or an adhesive film layer, a wave-absorbing layer and a backing; the wave-absorbing layer and the backing are respectively arranged on the outermost side of the wave-absorbing adhesive film, and the wave-absorbing layer is a film formed by mixing a wave-absorbing material and a resin matrix; the wave-absorbing adhesive film is prepared by using a tape casting method, and the reinforcing layer, the adhesive film layer and the backing are arranged on one side of the wave-absorbing layer, so that the adhesive property of the tape-casting wave-absorbing adhesive film can be enhanced, the tape-casting wave-absorbing adhesive film is prevented from being broken during paving, the working efficiency is improved, and meanwhile, the wave-absorbing layer is compounded with the resin layer in the tape casting process, so that the adhesive property of the wave-absorbing layer is improved. And the time for compounding the two components before construction is saved, the operation difficulty is reduced, and the number of procedures is reduced.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a wave-absorbing adhesive film and a preparation method thereof. Background technique [0002] Absorbing materials refer to a class of materials that can absorb and attenuate incident electromagnetic waves, convert their electromagnetic energy into heat energy and dissipate them, or make electromagnetic waves disappear due to interference. The wave-absorbing adhesive film material is one of the most widely used resin-based wave-absorbing composite materials at present. Because of its advantages such as simple covering molding method and co-curing with structural composite materials, it has been used in the stealth construction of various products. At present, the preparation methods of microwave-absorbing adhesive film that are widely used include dry process and wet process. The wet process is mostly tape-casting process. Usually, it is necessary to disperse the...

Claims

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Application Information

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IPC IPC(8): C09J7/21C09D5/32C09D163/02C09D163/04
CPCC09J7/21C09D5/32C09D163/00C09J2400/143C09J2301/16C09J2400/263C09J2400/10C09J2477/006C08L63/04C08K3/18C08L3/04C08K7/06
Inventor 李旻吕通李阳庞程宫元勋
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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