CN108624193B - Preparation method of flexible patch wave-absorbing material - Google Patents
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
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Abstract
The invention discloses a preparation method of a flexible patch wave-absorbing material, which comprises the steps of preparing wave-absorbing coating paint and tape casting, wherein the step of preparing the wave-absorbing coating paint comprises the steps of weighing pretreatment, premixing, curing and wave-absorbing coating preparation. The flexible patch wave-absorbing material prepared by the method has reliable performance and stable quality, has a vertical reflectivity average value of 8GHz-12GHz below-2 dB, reduces the interference of clutter on surrounding electronic equipment and personnel, and is particularly suitable for weaponry, military facilities and household appliances; the flexible patch wave-absorbing material provided by the invention can quickly repair the damaged part of the coating, is easy to stick and remove, is convenient and quick to use, and does not influence the use effect. The preparation method provided by the invention is simple to operate, convenient to prepare, low in cost and suitable for industrial large-scale production.
Description
Technical Field
The invention relates to a wave-absorbing material, in particular to a preparation method of a flexible patch wave-absorbing material.
Background
The absorption materials are coated on various weaponry such as airplanes, missiles, tanks, naval vessels, warehouses and the like and military facilities, and can absorb reconnaissance electric waves and attenuate reflected signals, so that the defense area of enemy radars is broken through, and the method is a powerful means for anti-radar reconnaissance and reduces the possibility that a weapon system is attacked by infrared guided missiles and laser weapons. For example, the effective reflective cross-section of the U.S. B-1 strategic bomber is only 1/50 for B-52 bombers due to the coating with the absorbing material; the infrared radiation of the engine can be reduced by about 90% after the fairing of the engine of the cobra helicopters of 0H-6 and AH-1G types is coated with the absorbing material. In the 1990 gulf war, the first american plane entering iraq was a stealth aircraft coated with an absorbent material, which effectively circumvented the radar monitoring of iraq.
On one hand, because of the wide application of high-power radars and electronic products, particularly mobile communication, computers, household appliances and other equipment, the prevention of electromagnetic radiation or leakage and the protection of the physical health of operators are brand-new and complicated subjects, and the purpose can be achieved by the wave-absorbing material. In addition, the electromagnetic radiation problem of the household appliances at present generally exists, and the wave-absorbing materials and components thereof can be effectively inhibited through reasonable use.
On the other hand, in the using process, the wave-absorbing coatings on weaponry, military facilities and household appliances are easily damaged, the surfaces of some military equipment are covered by the wave-absorbing coatings, but the wave-absorbing materials are required to be convenient for quick mounting and dismounting at the cover due to the fact that the cover is opened. In order to not affect the effective use, the problems of repairing the wave-absorbing coating and facilitating the rapid mounting and dismounting at the opening cover are urgently needed to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a flexible patch wave-absorbing material.
The purpose of the invention is realized by the following technical scheme: a preparation method of a flexible patch wave-absorbing material comprises a wave-absorbing coating, an adhesive layer, a conductive substrate layer, an adhesive layer and a stripping paper layer from top to bottom, and comprises the following steps:
s1, preparing the wave-absorbing coating: the method comprises the following substeps:
s11, weighing: weighing the raw materials according to a formula proportion, wherein the formula comprises the following components: the epoxy resin comprises the following raw materials in parts by weight: 40-60; nanocrystalline absorber: 400-600 parts; white carbon black: 1-5; curing agent: 35-60 parts of; coupling agent: 10-20; catalyst: 2-5; dispersing agent: 2-8; defoaming agent: 0.5 to 1.5; mixing solvent: 100-200 parts of; wherein the mixed solvent is a mixture of cyclohexanone and butanone;
s12: pretreatment: taking absolute ethyl alcohol, dispersing at the rotating speed of 800-1200 r/min, slowly adding a nanocrystal absorbent after dispersion, increasing the rotating speed to 2500-3500 r/min, adding a KH550 hydrolysis solution after high-speed dispersion for 50-70 min, performing high-speed dispersion coating treatment at normal temperature for 100-140 min, standing for 7-12 min, discarding supernatant, washing a solid with absolute ethyl alcohol, filtering, drying, and sieving with a 200-mesh sieve to obtain a pretreated nanocrystal absorbent;
s13, premixing: uniformly mixing and stirring epoxy resin, 2/5-volume mixed solvent, coupling agent, defoaming agent, dispersing agent and white carbon black, dispersing by using high-speed dispersing agent, wherein the rotating speed of a dispersion machine is 150-250 r/min, adding the nanocrystalline absorbent pretreated in the step S12 after dispersion, stirring for 8-14 min, adjusting the rotating speed of the dispersion machine to 3000-4000 r/min, and re-dispersing for 25-35 min to obtain viscous wave-absorbing slurry, adding ZrO (ZrO) into the wave-absorbing slurry2Grinding balls, performing ball milling for 3.5-4.5 hours, and filtering by using a 200-mesh filter screen to obtain a premixed wave-absorbing coating;
s14: and (3) curing: adding a curing agent and 1/5 volume of mixed solvent into a new container, and stirring for 25-35 min under the condition that the rotating speed is 150-200 r/min to obtain a wave-absorbing coating curing component;
s15: preparing a wave-absorbing coating: sequentially adding the premixed wave-absorbing coating prepared in the step S13, the wave-absorbing coating curing component prepared in the step S14, the catalyst and the mixed solvent with the volume of 2/5 into a stirring container, and uniformly stirring to obtain the wave-absorbing coating;
s2, casting: and (2) selecting acrylic acid pressure-sensitive adhesive or organic silicon pressure-sensitive adhesive as adhesive, nickel-plated or silver-plated nylon fiber cloth as conductive base material, coating adhesive on two sides of the nickel-plated or silver-plated nylon fiber cloth, then attaching release paper on one side coated with the adhesive, and attaching the wave-absorbing coating prepared in the step S1 on the other side by adopting a tape casting process to prepare the flexible patch wave-absorbing material.
Further, in the step S11, the epoxy resin is one or more of E-44, NPEL-128E or NPER-133L; the nanocrystalline absorbent is hexagonal crystal barium ferrite nanocrystalline or carbonyl iron powder; the curing agent is one or more of EC130, EC301 or EC 201; the coupling agent is KH 560; the catalyst is DMP-30; the dispersing agent is BYK110, and the defoaming agent is dimethyl silicone oil.
Further, the volume ratio of cyclohexanone to butanone in step S11 is 1: 5.
Further, the drying in step S12 is drying for 1.5-2.5 h in a vacuum drying oven at 90-110 ℃.
Further, the diameter of the grinding ball in the step S13 is 6mm, and the mass ratio of the grinding ball to the wave-absorbing slurry is 10: 1.
Further, in the step S2, the thickness of the nickel-plated or silver-plated nylon cloth is 0.10-0.20 mm, the thickness of the acrylic pressure-sensitive adhesive or the silicone pressure-sensitive adhesive is 0.02-0.08 mm, and the thickness of the wave-absorbing coating is 0.15-0.30 mm.
Further, the control conditions of the casting process in step S2 are: the slurry has a viscosity of 1200 to 1600 Pa.S, a casting speed of 0.6 to 1.2cm/S, a blade height of 120 to 150 μm, and a drying temperature of 180 to 280 ℃.
The invention has the following advantages: the flexible patch wave-absorbing material prepared by the method has reliable performance and stable quality, has a vertical reflectivity average value of 8GHz-12GHz below-2 dB, reduces the interference of clutter on surrounding electronic equipment and personnel, and is particularly suitable for weaponry, military facilities and household appliances; the flexible patch wave-absorbing material provided by the invention can quickly repair the damaged part of the coating, is easy to stick and remove, is convenient and quick to use, and does not influence the use effect. The preparation method provided by the invention is simple to operate, convenient to prepare, low in cost and suitable for industrial large-scale production.
Drawings
FIG. 1 is a schematic structural diagram of a flexible patch wave-absorbing material of the present invention.
Detailed Description
The invention is further described below with reference to examples, without limiting the scope of the invention to the following:
example 1: a preparation method of a flexible patch wave-absorbing material comprises a wave-absorbing coating, an adhesive layer, a conductive substrate layer, an adhesive layer and a release paper layer from top to bottom in sequence, as shown in figure 1, and comprises the following steps:
s1, preparing the wave-absorbing coating: the method comprises the following substeps:
s11, weighing: weighing the raw materials according to a formula proportion, wherein the formula comprises the following components: the epoxy resin comprises the following raw materials in parts by weight: 40; nanocrystalline absorber: 400, respectively; white carbon black: 1; curing agent: 35; coupling agent: 10; catalyst: 2; dispersing agent: 2; defoaming agent: 0.5; mixing solvent: 100, respectively; wherein the mixed solvent is a mixture of cyclohexanone and butanone, and the volume ratio of the cyclohexanone to the butanone is 1: 5; wherein the epoxy resin is E-44; the nanocrystalline absorbent is hexagonal barium ferrite nanocrystalline absorbent; the curing agent is EC 130; the coupling agent is KH 560; the catalyst is DMP-30; the dispersing agent is BYK110, and the defoaming agent is dimethyl silicone oil.
S12: pretreatment: taking absolute ethyl alcohol, dispersing at the rotating speed of 800r/min, slowly adding a nanocrystalline absorbent after dispersion, increasing the rotating speed to 2500r/min, adding a KH550 hydrolysis solution after high-speed dispersion for 50min, performing high-speed dispersion and coating treatment at normal temperature for 100min, standing for 7min, discarding supernatant, washing a solid with absolute ethyl alcohol, filtering to dryness, drying in a vacuum drying oven at 90 ℃ for 1.5h, and sieving with a 200-mesh sieve to obtain a pretreated nanocrystalline absorbent;
s13, premixing: uniformly mixing and stirring epoxy resin, 2/5-volume mixed solvent, coupling agent, defoaming agent, dispersing agent and white carbon black, dispersing by using high-speed dispersing agent, wherein the rotating speed of a dispersion machine is 150r/min, adding the nanocrystalline absorbent pretreated in the step S12 after dispersion, stirring for 8min, adjusting the rotating speed of the dispersion machine to 3000r/min, and dispersing for 25min to obtain viscous wave-absorbing slurry, wherein ZrO is added into the wave-absorbing slurry2Grinding balls, performing ball milling for 3.5 hours, wherein the diameter of each grinding ball is 6mm, the mass ratio of the grinding balls to the wave-absorbing slurry is 10:1, and filtering by using a 200-mesh filter screen to obtain a premixed wave-absorbing coating;
s14: and (3) curing: adding a curing agent and a mixed solvent with the volume of 1/5 into a new container, and stirring for 25min under the condition that the rotating speed is 150r/min to obtain a wave-absorbing coating curing component;
s15: preparing a wave-absorbing coating: sequentially adding the premixed wave-absorbing coating prepared in the step S13, the wave-absorbing coating curing component prepared in the step S14, the catalyst and the mixed solvent with the volume of 2/5 into a stirring container, and uniformly stirring to obtain the wave-absorbing coating;
s2, casting: selecting an acrylic acid pressure-sensitive adhesive as an adhesive, nickel-plated nylon fiber cloth as a conductive base material, coating adhesives on two sides of the nickel-plated nylon fiber cloth, then attaching release paper on one side of the adhesive-coated side, and attaching the wave-absorbing coating prepared in the step S1 to the other side of the adhesive-coated side by adopting a tape casting process to obtain the flexible patch wave-absorbing material, wherein the nickel-plated nylon cloth is 0.10mm thick, the acrylic acid pressure-sensitive adhesive is 0.02mm thick, and the wave-absorbing coating is 0.15mm thick; the control conditions of the casting process are as follows: the slurry viscosity was 1200Pa · S, the casting speed was 0.6cm/S, the blade height was 120 μm, and the drying temperature was 180 ℃.
Example 2: a preparation method of a flexible patch wave-absorbing material comprises a wave-absorbing coating, an adhesive layer, a conductive substrate layer, an adhesive layer and a release paper layer from top to bottom in sequence, as shown in figure 1, and comprises the following steps:
s1, preparing the wave-absorbing coating: the method comprises the following substeps:
s11, weighing: weighing the raw materials according to a formula proportion, wherein the formula comprises the following components: the epoxy resin comprises the following raw materials in parts by weight: 60, adding a solvent to the mixture; nanocrystalline absorber: 600, preparing a mixture; white carbon black: 5; curing agent: 60, adding a solvent to the mixture; coupling agent: 20; catalyst: 5; dispersing agent: 8; defoaming agent: 1.5; mixing solvent: 200 of a carrier; wherein the mixed solvent is a mixture of cyclohexanone and butanone, and the volume ratio of the cyclohexanone to the butanone is 1: 5; the epoxy resin is a mixture of NPEL-128E and NPER-133L; the nanocrystalline absorbent is a BASF-EW carbonyl iron powder absorbent; the curing agent is a mixture of EC301 and EC 201; the coupling agent is KH 560; the catalyst is DMP-30; the dispersing agent is BYK110, and the defoaming agent is dimethyl silicone oil.
S12: pretreatment: taking absolute ethyl alcohol, dispersing at the rotating speed of 1200r/min, slowly adding a nanocrystalline absorbent after dispersion, increasing the rotating speed to 3500r/min, adding KH550 hydrolysis solution after high-speed dispersion for 70min, performing high-speed dispersion and coating treatment at normal temperature for 140min, standing for 12min, discarding supernatant, washing solid with absolute ethyl alcohol, filtering to dryness, drying in a vacuum drying oven at 110 ℃ for 2.5h, and sieving with a 200-mesh sieve to obtain the pretreated nanocrystalline absorbent;
s13, premixing: uniformly mixing and stirring epoxy resin, 2/5-volume mixed solvent, coupling agent, defoaming agent, dispersing agent and white carbon black, dispersing by using high-speed dispersing agent, wherein the rotating speed of a dispersion machine is 250r/min, adding the nanocrystalline absorbent pretreated in the step S12 after dispersion, stirring for 14min, adjusting the rotating speed of the dispersion machine to 4000r/min, and dispersing for 35min to obtain viscous wave-absorbing slurry, wherein ZrO is added into the wave-absorbing slurry2Grinding balls, performing ball milling for 4.5 hours, wherein the diameter of each grinding ball is 6mm, the mass ratio of the grinding balls to the wave-absorbing slurry is 10:1, and filtering by using a 200-mesh filter screen to obtain a premixed wave-absorbing coating;
s14: and (3) curing: adding a curing agent and a mixed solvent with the volume of 1/5 into a new container, and stirring for 35min under the condition that the rotating speed is 200r/min to obtain a wave-absorbing coating curing component;
s15: preparing a wave-absorbing coating: sequentially adding the premixed wave-absorbing coating prepared in the step S13, the wave-absorbing coating curing component prepared in the step S14, the catalyst and the mixed solvent with the volume of 2/5 into a stirring container, and uniformly stirring to obtain the wave-absorbing coating;
s2, casting: selecting an organic silicon pressure-sensitive adhesive as an adhesive, silver-plated nylon fiber cloth as a conductive base material, coating the adhesive on two sides of the silver-plated nylon fiber cloth, then attaching release paper on one side coated with the adhesive, and attaching the wave-absorbing coating prepared in the step S1 to the other side of the silver-plated nylon fiber cloth by adopting a tape casting process to prepare the flexible patch wave-absorbing material, wherein the thickness of the silver-plated nylon cloth is 0.20mm, the thickness of the organic silicon pressure-sensitive adhesive is 0.08mm, and the thickness of the wave-absorbing coating is 0.30 mm; the control conditions of the casting process are as follows: the slurry viscosity was 1600 pas, the casting speed was 1.2cm/S, the blade height was 150 μm, and the drying temperature was 280 ℃.
Example 3: a preparation method of a flexible patch wave-absorbing material comprises a wave-absorbing coating, an adhesive layer, a conductive substrate layer, an adhesive layer and a release paper layer from top to bottom in sequence, as shown in figure 1, and comprises the following steps:
s1, preparing the wave-absorbing coating: the method comprises the following substeps:
s11, weighing: weighing the raw materials according to a formula proportion, wherein the formula comprises the following components: the epoxy resin comprises the following raw materials in parts by weight: 52; nanocrystalline absorber: 500, a step of; white carbon black: 3; curing agent: 40; coupling agent: 15; catalyst: 3; dispersing agent: 5; defoaming agent: 1; mixing solvent: 160; wherein the mixed solvent is a mixture of cyclohexanone and butanone, and the volume ratio of the cyclohexanone to the butanone is 1: 5; the epoxy resin is a mixture of E-44, NPEL-128E and NPER-133L; the nanocrystalline absorbent is hexagonal barium ferrite nanocrystalline absorbent; the curing agent is a mixture of EC130, EC301 and EC 201; the coupling agent is KH 560; the catalyst is DMP-30; the dispersing agent is BYK110, and the defoaming agent is dimethyl silicone oil;
s12: pretreatment: taking absolute ethyl alcohol, dispersing at the rotating speed of 1000r/min, slowly adding a nanocrystalline absorbent after dispersion, increasing the rotating speed to 3000r/min, adding a KH550 hydrolysis solution after high-speed dispersion for 60min, performing high-speed dispersion and coating treatment at normal temperature for 120min, standing for 10min, discarding supernatant, washing a solid with absolute ethyl alcohol, filtering to dry, drying in a vacuum drying oven at 100 ℃ for 2h, and sieving with a 200-mesh sieve to obtain a pretreated nanocrystalline absorbent;
s13, premixing: uniformly mixing and stirring epoxy resin, 2/5-volume mixed solvent, coupling agent, defoaming agent, dispersing agent and white carbon black, dispersing by using high-speed dispersing agent, wherein the rotating speed of a dispersion machine is 200r/min, adding the nanocrystalline absorbent pretreated in the step S12 after dispersion, stirring for 10min, adjusting the rotating speed of the dispersion machine to 3500r/min, and dispersing for 30min to obtain viscous wave-absorbing slurry, wherein ZrO is added into the wave-absorbing slurry2Grinding balls, performing ball milling for 4 hours, wherein the diameter of each grinding ball is 6mm, the mass ratio of the grinding balls to the wave-absorbing slurry is 10:1, and filtering by using a 200-mesh filter screen to obtain a premixed wave-absorbing coating;
s14: and (3) curing: adding a curing agent and a mixed solvent with the volume of 1/5 into a new container, and stirring for 30min under the condition that the rotating speed is 180r/min to obtain a wave-absorbing coating curing component;
s15: preparing a wave-absorbing coating: sequentially adding the premixed wave-absorbing coating prepared in the step S13, the wave-absorbing coating curing component prepared in the step S14, the catalyst and the mixed solvent with the volume of 2/5 into a stirring container, and uniformly stirring to obtain the wave-absorbing coating;
s2, casting: selecting acrylic acid pressure-sensitive adhesive as adhesive, silver-plated nylon fiber cloth as conductive base material, coating adhesive on two sides of the silver-plated nylon fiber cloth, then attaching release paper on one side coated with the adhesive, and attaching the wave-absorbing coating prepared in the step S1 to the other side by adopting a tape casting process to prepare the flexible patch wave-absorbing material, wherein the thickness of the silver-plated nylon cloth is 0.15mm, the thickness of the acrylic acid pressure-sensitive adhesive is 0.06mm, and the thickness of the wave-absorbing coating is 0.20 mm; the control conditions of the casting process are as follows: the viscosity of the slurry was 1400Pa · S, the casting speed was 1cm/S, the blade height was 140 μm, and the drying temperature was 250 ℃.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention.
Claims (1)
1. A preparation method of a flexible patch wave-absorbing material is characterized in that the flexible patch wave-absorbing material sequentially comprises a wave-absorbing coating, an adhesive layer, a conductive substrate layer, an adhesive layer and a stripping paper layer from top to bottom, and the preparation method comprises the following steps:
s1, preparing the wave-absorbing coating: the method comprises the following substeps:
s11, weighing: weighing the raw materials according to a formula proportion, wherein the formula comprises the following components: the epoxy resin comprises the following raw materials in parts by weight: 40-60; nanocrystalline absorber: 400-600 parts; white carbon black: 1-5; curing agent: 35-60 parts of; coupling agent: 10-20; catalyst: 2-5; dispersing agent: 2-8; defoaming agent: 0.5 to 1.5; mixing solvent: 100-200 parts of; wherein the mixed solvent is a mixture of cyclohexanone and butanone, and the volume ratio of the cyclohexanone to the butanone is 1: 5; the epoxy resin is one or more of E-44, NPEL-128E or NPER-133L; the nanocrystalline absorbent is hexagonal crystal barium ferrite nanocrystalline or carbonyl iron powder; the curing agent is one or more of EC130, EC301 or EC 201; the coupling agent is KH 560; the catalyst is DMP-30; the dispersing agent is BYK110, and the defoaming agent is dimethyl silicone oil;
s12: pretreatment: taking absolute ethyl alcohol, dispersing at the rotating speed of 800-1200 r/min, slowly adding a nanocrystalline absorbent after dispersion, increasing the rotating speed to 2500-3500 r/min, adding a KH550 hydrolysis solution after high-speed dispersion for 50-70 min, performing high-speed dispersion and coating treatment at normal temperature for 100-140 min, standing for 7-12 min, discarding supernatant, washing a solid with absolute ethyl alcohol, filtering, drying, and sieving with a 200-mesh sieve to obtain a pretreated nanocrystalline absorbent, wherein the drying is drying in a vacuum drying oven at the temperature of 90-110 ℃ for 1.5-2.5 h;
s13, premixing: uniformly mixing and stirring epoxy resin, 2/5-volume mixed solvent, coupling agent, defoaming agent, dispersing agent and white carbon black, dispersing by using high-speed dispersing agent, wherein the rotating speed of a dispersion machine is 150-250 r/min, adding the nanocrystalline absorbent pretreated in the step S12 after dispersion, stirring for 8-14 min, adjusting the rotating speed of the dispersion machine to 3000-4000 r/min, and re-dispersing for 25-35 min to obtain viscous wave-absorbing slurry, adding ZrO (ZrO) into the wave-absorbing slurry2Grinding balls with the diameter of 6mm, the mass ratio of the grinding balls to the wave-absorbing slurry of 10:1, ball-milling for 3.5-4.5 h, and filtering by using a 200-mesh filter screen to obtain a premixed wave-absorbing coating;
s14: and (3) curing: adding a curing agent and 1/5 volume of mixed solvent into a new container, and stirring for 25-35 min under the condition that the rotating speed is 150-200 r/min to obtain a wave-absorbing coating curing component;
s15: preparing a wave-absorbing coating: sequentially adding the premixed wave-absorbing coating prepared in the step S13, the wave-absorbing coating curing component prepared in the step S14, the catalyst and the mixed solvent with the volume of 2/5 into a stirring container, and uniformly stirring to obtain the wave-absorbing coating;
s2, casting: selecting acrylic acid pressure-sensitive adhesive or organic silicon pressure-sensitive adhesive as adhesive, nickel-plated or silver-plated nylon fiber cloth as conductive base material, wherein the thickness of the nickel-plated or silver-plated nylon cloth is 0.10-0.20 mm, the thickness of the acrylic acid pressure-sensitive adhesive or organic silicon pressure-sensitive adhesive is 0.02-0.08 mm, the thickness of the wave-absorbing coating is 0.15-0.30 mm, coating adhesive on two sides of the nickel-plated or silver-plated nylon fiber cloth, then attaching release paper on one side coated with the adhesive, and attaching the wave-absorbing coating prepared in the step S1 on the other side by adopting a tape casting process to prepare the flexible patch wave-absorbing material; the control conditions of the casting process are as follows: the slurry has a viscosity of 1200 to 1600 Pa.S, a casting speed of 0.6 to 1.2cm/S, a blade height of 120 to 150 μm, and a drying temperature of 180 to 280 ℃.
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| CN109517559B (en) * | 2018-10-30 | 2022-04-08 | 成都飞机工业（集团）有限责任公司 | Fast-curing wave-absorbing edge sealing adhesive |
| CN109517558B (en) * | 2018-10-30 | 2022-04-08 | 成都飞机工业（集团）有限责任公司 | Preparation method of fast-curing wave-absorbing edge sealing adhesive |
| CN111969330B (en) * | 2020-07-31 | 2023-02-10 | 航天科工武汉磁电有限责任公司 | Radar wave-absorbing material with unit structure pattern and preparation method thereof |
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