CN106739321A - A kind of structural wave-absorbing material and preparation method thereof - Google Patents
A kind of structural wave-absorbing material and preparation method thereof Download PDFInfo
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- CN106739321A CN106739321A CN201611080943.5A CN201611080943A CN106739321A CN 106739321 A CN106739321 A CN 106739321A CN 201611080943 A CN201611080943 A CN 201611080943A CN 106739321 A CN106739321 A CN 106739321A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/002—Agents changing electric characteristics
- B29K2105/0023—Agents changing electric characteristics improving electric conduction
Abstract
The invention discloses a kind of structural wave-absorbing material, it is related to absorbing material technical field, structural wave-absorbing material is MULTILAYER COMPOSITE absorbing material, it is composited by wave permeation layer, impedance matching layer, reflecting layer and at least one suction ripple layer, wave permeation layer is made up of macromolecule resin, impedance matching layer is made up of macromolecule resin and conductive black, inhales ripple layer and is made up of macromolecule resin and absorbent, and reflecting layer is made up of macromolecule resin and chopped carbon fiber.Structural wave-absorbing material of the invention is composited by wave permeation layer, impedance matching layer, reflecting layer and at least one suction ripple layer, and without using coating, health environment-friendly can reduce environmental pollution, and simple structure, easy to process.
Description
Technical field
The present invention relates to absorbing material technical field, and in particular to a kind of structural wave-absorbing material and preparation method thereof.
Background technology
Electromagnetic wave absorb is that one kind can effectively absorb incident electromagnetic wave, significantly reduces the function and service material of echo strength
Material, has important application in military stealthy, domestic electromagnetic protection and electromagnetism interference field.Current more ripe absorbing material
Structure is including Salisbury screens, Dallenbach screens, Jaumann wave-absorbers, multi-layer Matched structure etc..Wherein Salisbury inhales
It is narrow that acceptor absorbs frequency range；Dallenbach absorbers are limited by current material electromagnetic parameter frequency dispersion effect, it is difficult to realize wideband
Absorb；The design of Jaumann absorbers is simple, and absorption frequency range is wide, but it is its major defect that material thickness is larger.The hair of modern technologies
Exhibition, requirement higher is proposed to absorbing material, structure-type wave-absorption composite material uses fibre reinforcement, carry out absorbing property and
The comprehensive integrated design of mechanical property, so as to have the dual-use function inhaled ripple and carry concurrently, has become absorbing material research field
An important directions.
From the point of view of structural wave-absorbing material present Research, more conventional method is by antiradar coatings spraying or dip-coating at present
Onto fibre reinforcement base material, the wave absorption base material of individual layer is prepared, then under high-temperature and high-pressure conditions, use glued membrane or corresponding
Adhesive the wave absorption base material of individual layer be bonded together finally prepare structural absorbing mater ials.
But this preparation method cycle is long, and efficiency is low, solvent based coating is substantial amounts of to be used, and causes high volatile to organise
The discharge of compound VOC, does not meet the requirement of environmental protection and sustainable development.
The content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of structural wave-absorbing material and its preparation
Method.
To achieve the above objectives, the present invention is adopted the technical scheme that：
A kind of structural wave-absorbing material, it is characterised in that：The structural wave-absorbing material is MULTILAYER COMPOSITE absorbing material, by wave transparent
Layer, impedance matching layer, reflecting layer and at least one suction ripple layer are composited, and the wave permeation layer is made up of macromolecule resin, the resistance
Anti- matching layer is made up of macromolecule resin and conductive black, and the suction ripple layer is made up of macromolecule resin and absorbent, described anti-
Layer is penetrated to be made up of macromolecule resin and chopped carbon fiber.
On the basis of above-mentioned technical proposal, the gross thickness of the structural wave-absorbing material is 4mm~10mm, the wave permeation layer
Thickness be 1mm~4mm, the thickness of the impedance matching layer is 0.5mm~1mm, it is all it is described inhale ripples layer thickness sum be
2mm~4mm, the thickness in the reflecting layer is 0.5mm~1mm.
On the basis of above-mentioned technical proposal, the structural wave-absorbing material by the wave permeation layer of individual layer, impedance matching layer,
The suction ripple layer composition of reflecting layer and multilayer.
On the basis of above-mentioned technical proposal, in the impedance matching layer weight percentage of conductive carbon black be 5%~
20%, the weight percentage for inhaling absorbent in ripple layer is 65%~85%, the weight of chopped carbon fiber in the reflecting layer
Amount percentage composition is 15%~50%.
On the basis of above-mentioned technical proposal, the resistivity of the conductive black is not more than 3.0 Ω m, and it is (30 to regard specific volume
~50) cm3/g。
On the basis of above-mentioned technical proposal, the absorbent includes carbonyl iron dust, ferrite powder, iron silicochromium or iron silicon
Al alloy powder one or more.
On the basis of above-mentioned technical proposal, of length no more than 3mm of the chopped carbon fiber, resistivity is not more than 1.0
Ω·cm。
Present invention also offers a kind of preparation method of said structure absorbing material, comprise the following steps：
S1：Macromolecule resin and conductive black, macromolecule resin and absorbent, high score subtree are prepared according to certain ratio
Fat and chopped carbon fiber；
S2：It is respectively that macromolecule resin and conductive black, macromolecule resin and absorbent, macromolecule resin and chopped carbon is fine
Dimension is put into homogenizer and is well mixed, and respectively obtains the material for making impedance matching layer, inhaling ripple layer and reflecting layer；
S3：During macromolecule resin material and the material being well mixed separately put into multi-layer co-extruded extruder, pass through
Using multi-layer co-extruded processing and forming technology, wave permeation layer, impedance matching layer are formed respectively, ripple layer and reflecting layer is inhaled, and is combined
Into structural wave-absorbing material.
On the basis of above-mentioned technical proposal, the multi-layer co-extruded extruder includes at least four double screw extruders, four
The individual double screw extruder corresponds to the processing wave permeation layer, impedance matching layer, inhales ripple layer and reflecting layer respectively.
On the basis of above-mentioned technical proposal, adjust corresponding by controlling the temperature and rotary speed parameter of double screw extruder
The wave permeation layer, impedance matching layer, the thickness for inhaling ripple layer or reflecting layer.
Compared with prior art, the advantage of the invention is that：
(1) structural wave-absorbing material of the invention by wave permeation layer, impedance matching layer, reflecting layer and at least one inhale ripple layer it is compound and
Into without using coating, health environment-friendly can reduce environmental pollution, and simple structure, easy to process.
(2) structural wave-absorbing material preparation method operation of the invention is simple, and integrated molding is high in machining efficiency, processing essence
Degree is high, and preparation cost is low.
Specific embodiment
The present invention is described in further detail with reference to embodiments.
The present invention provides a kind of structural wave-absorbing material, and structural wave-absorbing material is MULTILAYER COMPOSITE absorbing material, by wave permeation layer, resistance
Anti- matching layer, reflecting layer and at least one suction ripple layer are composited, and wave permeation layer is made up of macromolecule resin, and impedance matching layer is by high score
Subtree fat and conductive black are constituted, and are inhaled ripple layer and are made up of macromolecule resin and absorbent, and reflecting layer is by macromolecule resin and is chopped
Carbon fiber is constituted.
The gross thickness of structural wave-absorbing material is 4mm~10mm, and the thickness of wave permeation layer is 1mm~4mm, the thickness of impedance matching layer
It is 0.5mm~1mm to spend, and the thickness sum of all suction ripple layers is 2mm~4mm, and the thickness in reflecting layer is 0.5mm~1mm.
In specific implementation process, structural wave-absorbing material can be by the wave permeation layer of individual layer, impedance matching layer, reflecting layer and many
The suction ripple layer composition of layer.Macromolecule resin can be one or more of PA11, PA6, PA66, PA1010, ABS, PVC.
The weight percentage of conductive carbon black is 5%~20% in impedance matching layer, inhales the weight hundred of absorbent in ripple layer
Content is divided to be 65%~85%, the weight percentage of chopped carbon fiber is 15%~50% in reflecting layer.Wherein, conductive black
Resistivity be not more than 3.0 Ω m, it is (30~50) cm to regard specific volume3/g；Absorbent includes carbonyl iron dust, ferrite powder, iron
Silicochromium/sendust powder one or more；Of length no more than 3mm of chopped carbon fiber, resistivity is not more than 1.0
Ω·cm。
Present invention also offers a kind of preparation method of said structure absorbing material, comprise the following steps：
S1：Macromolecule resin and conductive black, macromolecule resin and absorbent, high score subtree are prepared according to certain ratio
Fat and chopped carbon fiber；
S2：It is respectively that macromolecule resin and conductive black, macromolecule resin and absorbent, macromolecule resin and chopped carbon is fine
Dimension is put into homogenizer and is well mixed, and respectively obtains the material for making impedance matching layer, inhaling ripple layer and reflecting layer；
S3：During macromolecule resin material and the material being well mixed separately put into multi-layer co-extruded extruder, pass through
Using multi-layer co-extruded processing and forming technology, wave permeation layer, impedance matching layer are formed respectively, ripple layer and reflecting layer is inhaled, and is combined
Into structural wave-absorbing material.
Multi-layer co-extruded extruder includes at least four double screw extruders, and four double screw extruders correspond to processing thoroughly respectively
Ripple layer, impedance matching layer, suction ripple layer and reflecting layer.Can be adjusted by controlling the temperature and rotary speed parameter of double screw extruder
Corresponding wave permeation layer, impedance matching layer, the thickness for inhaling ripple layer or reflecting layer.
Below by way of 6 embodiments, the present invention is described in detail.
Embodiment 1
Performance requirement according to required for absorbent structure plate, design structure absorbing material gross thickness is 4mm, wherein wave permeation layer
Thickness for 1mm, impedance matching layer thickness for 0.5mm, inhale ripple layer thickness for 2mm, reflecting layer thickness be 0.5mm.Its
Middle wave transparent composition of layer is the PA11 trees of PA11 resin beds, the conductive black that impedance matching composition of layer is 5 mass parts and 95 mass parts
Resin blends, the carbonyl iron dust that suction ripple composition of layer is 65 mass parts are with 35 mass parts PA11 resin blends, reflection composition of layer
The PA11 resin blends of the chopped carbon fiber of 15 mass parts and 85 mass parts.
In the preparation method of this structural wave-absorbing material, the corresponding double screw extruder transportation section temperature of wave permeation layer is set as
165 DEG C, melt zone temperature is set as 185 DEG C, and mixing section temperature is set as 205 DEG C, and double screw extruder rotating speed is 300r
min-1；The corresponding double screw extruder transportation section temperature of impedance matching layer is set as 165 DEG C, and melt zone temperature is set as 205 DEG C,
Mixing section temperature is set as 215 DEG C, and double screw extruder rotating speed is 280rmin-1；Inhale the corresponding double screw extruder of ripple layer defeated
A section temperature is sent to be set as 165 DEG C, melt zone temperature is set as 225 DEG C, and mixing section temperature is set as 245 DEG C, double screw extruder
Rotating speed is 450rmin-1；The corresponding double screw extruder transportation section temperature in reflecting layer is set as 165 DEG C, the setting of melt zone temperature
It it is 205 DEG C, mixing section temperature is set as 215 DEG C, and double screw extruder rotating speed is 280rmin-1。
In 4GHz~8GHz wavelength band internal reflections rate≤- 7dB, tensile strength is 203.2MPa to this structural wave-absorbing material,
Bending strength is 157.1MPa, and interlaminar shear strength is 46.8MPa.
Embodiment 2
Performance requirement according to required for absorbent structure plate, design structure absorbing material gross thickness is 10mm, wherein wave transparent
The thickness of layer is 4mm, the thickness of impedance matching layer is 1mm, the thickness of suction ripple layer is 4mm, the thickness in reflecting layer is 1mm.Wherein
Wave transparent composition of layer is total to for the PA6 resins of PA6 resin beds, the conductive black that impedance matching composition of layer is 20 mass parts and 80 mass parts
Mixed thing, to inhale ripple composition of layer be that the ferrite powder and 15 mass parts PA6 resin blends of 85 mass parts, reflection composition of layer are 50 mass
The chopped carbon fiber of part and the PA6 resin blends of 50 mass parts.
In the preparation method of this structural wave-absorbing material, the corresponding double screw extruder transportation section temperature of wave permeation layer is set as
220 DEG C, melt zone temperature is set as 255 DEG C, and mixing section temperature is set as 260 DEG C, and double screw extruder rotating speed is 400r
min-1；The corresponding double screw extruder transportation section temperature of impedance matching layer is set as 220 DEG C, and melt zone temperature is set as 255
DEG C, mixing section temperature is set as 265 DEG C, and double screw extruder rotating speed is 350rmin-1；Inhale the corresponding twin-screw extrusion of ripple layer
Machine transportation section temperature is set as 230 DEG C, and melt zone temperature is set as 255 DEG C, and mixing section temperature is set as 275 DEG C, and twin-screw is squeezed
Go out machine rotating speed for 600rmin-1；The corresponding double screw extruder transportation section temperature in reflecting layer is set as 225 DEG C, melt zone temperature
Degree is set as 255 DEG C, and mixing section temperature is set as 275 DEG C, and double screw extruder rotating speed is 350rmin-1.
This structural wave-absorbing material is in 2GHz~18GHz wavelength band internal reflections rate≤- 12dB.The drawing of this structural wave-absorbing material
Intensity is stretched for 253.4MPa, and bending strength is 187.1MPa, and interlaminar shear strength is 44.7MPa.
Embodiment 3
Performance requirement according to required for absorbent structure plate, design structure absorbing material gross thickness is 8mm, wherein wave permeation layer
Thickness for 2mm, impedance matching layer thickness for 1mm, inhale ripple layer thickness for 4mm, reflecting layer thickness be 1mm.It is wherein saturating
Ripple composition of layer is total to for the PA66 resins of PA66 resin beds, the conductive black that impedance matching composition of layer is 10 mass parts and 90 mass parts
It is 20 to mix thing, inhale iron sial micro mist and 30 mass parts PA66 resin blends, reflection composition of layer that ripple composition of layer is 70 mass parts
The PA66 resin blends of the chopped carbon fiber of mass parts and 80 mass parts.
In the preparation method of this structural wave-absorbing material, the corresponding double screw extruder transportation section temperature of wave permeation layer is set as
240 DEG C, melt zone temperature is set as 290 DEG C, and mixing section temperature is set as 280 DEG C, and double screw extruder rotating speed is 300r
min-1；The corresponding double screw extruder transportation section temperature of impedance matching layer is set as 250 DEG C, and melt zone temperature is set as 285
DEG C, mixing section temperature is set as 295 DEG C, and double screw extruder rotating speed is 250rmin-1；Inhale the corresponding twin-screw extrusion of ripple layer
Machine transportation section temperature is set as 245 DEG C, and melt zone temperature is set as 285 DEG C, and mixing section temperature is set as 305 DEG C, and twin-screw is squeezed
Go out machine rotating speed for 450rmin-1；The corresponding double screw extruder transportation section temperature in reflecting layer is set as 245 DEG C, melt zone temperature
Degree is set as 285 DEG C, and mixing section temperature is set as 305 DEG C, and double screw extruder rotating speed is 250rmin-1.
This structural wave-absorbing material is in 2GHz~18GHz wavelength band internal reflections rate≤- 10dB.The drawing of this structural wave-absorbing material
Intensity is stretched for 216.9MPa, and bending strength is 151.7MPa, and interlaminar shear strength is 53.2MPa.
Embodiment 4
Performance requirement according to required for absorbent structure plate, design structure absorbing material gross thickness is 7mm, wherein wave permeation layer
Thickness for 3mm, impedance matching layer thickness for 0.5mm, inhale ripple layer thickness for 3mm, reflecting layer thickness be 0.5mm.Its
Middle wave transparent composition of layer is PA1010 resin beds, the conductive black that impedance matching composition of layer is 12 mass parts and 88 mass parts
PA1010 resin blends, inhale ripple composition of layer be 80 mass parts iron silicochromium micro mist and 20 mass parts PA1010 resin blends,
Reflection composition of layer is the chopped carbon fiber of 30 mass parts and the PA1010 resin blends of 70 mass parts.
In the preparation method of this structural wave-absorbing material, the corresponding double screw extruder transportation section temperature of wave permeation layer is set as
240 DEG C, melt zone temperature is set as 260 DEG C, and mixing section temperature is set as 280 DEG C, and double screw extruder rotating speed is 350r
min-1；The corresponding double screw extruder transportation section temperature of impedance matching layer is set as 250 DEG C, and melt zone temperature is set as 285
DEG C, mixing section temperature is set as 295 DEG C, and double screw extruder rotating speed is 250rmin-1；Inhale the corresponding twin-screw extrusion of ripple layer
Machine transportation section temperature is set as 245 DEG C, and melt zone temperature is set as 265 DEG C, and mixing section temperature is set as 285 DEG C, and twin-screw is squeezed
Go out machine rotating speed for 550rmin-1；The corresponding double screw extruder transportation section temperature in reflecting layer is set as 245 DEG C, melt zone temperature
Degree is set as 265 DEG C, and mixing section temperature is set as 275 DEG C, and double screw extruder rotating speed is 250rmin-1.
This structural wave-absorbing material is in 2GHz~18GHz wavelength band internal reflections rate≤- 8dB.The drawing of this structural wave-absorbing material
Intensity is stretched for 255.1MPa, and bending strength is 147.6MPa, and interlaminar shear strength is 49.7MPa.
Embodiment 5
Performance requirement according to required for absorbent structure plate, design structure absorbing material gross thickness is 6mm, and this structure inhales ripple
Material include two-layer inhale ripple layer, wherein the thickness of wave permeation layer be 1mm, impedance matching layer thickness for 1mm, ground floor inhale ripple layer
Thickness is 2mm, the thickness of second layer suction ripple layer is 1.5mm, the thickness in reflecting layer is 0.5mm.Wherein wave transparent composition of layer is ABS trees
Lipid layer, the ABS resin blend of the conductive black that impedance matching composition of layer is 18 mass parts and 82 mass parts, ground floor inhale ripple layer
Composition be the carbonyl iron dust and 30 mass parts ABS resin blends of 70 mass parts, the second layer inhale ripple composition of layer be 80 mass parts
The ABS resin blend of iron sial micro mist and 20 mass parts, the chopped carbon fiber and 60 mass that reflection composition of layer is 40 mass parts
The ABS resin blend of part.
In the preparation method of this structural wave-absorbing material, multi-layer co-extruded extruder includes five double screw extruders.Wave permeation layer
Corresponding double screw extruder transportation section temperature is set as 190 DEG C, and melt zone temperature is set as 210 DEG C, the setting of mixing section temperature
It it is 220 DEG C, double screw extruder rotating speed is 350rmin-1；The corresponding double screw extruder transportation section temperature of impedance matching layer
It is set as 190 DEG C, melt zone temperature is set as 225 DEG C, and mixing section temperature is set as 245 DEG C, and double screw extruder rotating speed is
350r·min-1；Ground floor inhales ripple layer corresponding double screw extruder transportation section temperature and is set as 195 DEG C, and melt zone temperature sets
It is set to 225 DEG C, mixing section temperature is set as 245 DEG C, and double screw extruder rotating speed is 500rmin-1；It is right that the second layer inhales ripple layer
The double screw extruder transportation section temperature answered is set as 195 DEG C, and melt zone temperature is set as 215 DEG C, and mixing section temperature is set as
225 DEG C, double screw extruder rotating speed is 450rmin-1；The corresponding double screw extruder transportation section temperature in reflecting layer is set as
195 DEG C, melt zone temperature is set as 215 DEG C, and mixing section temperature is set as 235 DEG C, and double screw extruder rotating speed is 300r
min-1。
This structural wave-absorbing material is in 1GHz~4GHz wavelength band internal reflections rate≤- 8dB.The stretching of this structural wave-absorbing material
Intensity is 237.7MPa, and bending strength is 151.6MPa, and interlaminar shear strength is 43.7MPa.
Embodiment 6
Performance requirement according to required for absorbent structure plate, design structure absorbing material gross thickness is 5mm, and this structure inhales ripple
Material include two-layer inhale ripple layer, wherein the thickness of wave permeation layer be 2mm, impedance matching layer thickness for 0.5mm, ground floor inhale ripple layer
Thickness for 1mm, the second layer inhale ripple layer thickness for 1mm, reflecting layer thickness be 0.5mm.Wherein wave transparent composition of layer is PVC trees
Lipid layer, the polyvinyl chloride resin blend of the conductive black that impedance matching composition of layer is 16 mass parts and 84 mass parts, suction ripple 1 composition of layer
Ferrite powder and 35 mass parts polyvinyl chloride resin blends, the iron silicochromium micro mist that suction ripple 2 composition of layer are 80 mass parts for 65 mass parts
Polyvinyl chloride resin blend, reflection composition of layer with 20 mass parts are the chopped carbon fiber of 20 mass parts and the polyvinyl chloride resin of 80 mass parts
Blend.
In the preparation method of this structural wave-absorbing material, multi-layer co-extruded extruder includes five double screw extruders.Wave permeation layer
Corresponding double screw extruder transportation section temperature is set as 80 DEG C, and melt zone temperature is set as 110 DEG C, and mixing section temperature is set as
120 DEG C, double screw extruder rotating speed is 300rmin-1；The corresponding double screw extruder transportation section temperature of impedance matching layer sets
It is set to 90 DEG C, melt zone temperature is set as 115 DEG C, and mixing section temperature is set as 125 DEG C, and double screw extruder rotating speed is 300r
min-1；Ground floor inhales ripple layer corresponding double screw extruder transportation section temperature and is set as 75 DEG C, and melt zone temperature is set as 125
DEG C, mixing section temperature is set as 135 DEG C, and double screw extruder rotating speed is 350rmin-1；The second layer inhales ripple corresponding pair of spiral shell of layer
Bar extruder transportation section temperature is set as 75 DEG C, and melt zone temperature is set as 135 DEG C, and mixing section temperature is set as 140 DEG C, double spiral shells
Bar extruder rotating speed is 350rmin-1；The corresponding double screw extruder transportation section temperature in reflecting layer is set as 95 DEG C, melt zone
Temperature is set as 115 DEG C, and mixing section temperature is set as 135 DEG C, and double screw extruder rotating speed is 300rmin-1.
This structural wave-absorbing material is in 4GHz~8GHz wavelength band internal reflections rate≤- 10dB.The drawing of this structural wave-absorbing material
Intensity is stretched for 246.1MPa, and bending strength is 137.4MPa, and interlaminar shear strength is 38.4MPa.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (10)
1. a kind of structural wave-absorbing material, it is characterised in that：The structural wave-absorbing material is MULTILAYER COMPOSITE absorbing material, by wave transparent
Layer, impedance matching layer, reflecting layer and at least one suction ripple layer are composited, and the wave permeation layer is made up of macromolecule resin, the resistance
Anti- matching layer is made up of macromolecule resin and conductive black, and the suction ripple layer is made up of macromolecule resin and absorbent, described anti-
Layer is penetrated to be made up of macromolecule resin and chopped carbon fiber.
2. structural wave-absorbing material as claimed in claim 1, it is characterised in that：The gross thickness of the structural wave-absorbing material is 4mm
~10mm, the thickness of the wave permeation layer is 1mm~4mm, and the thickness of the impedance matching layer is 0.5mm~1mm, all suctions
The thickness sum of ripple layer is 2mm~4mm, and the thickness in the reflecting layer is 0.5mm~1mm.
3. structural wave-absorbing material as claimed in claim 1, it is characterised in that：The structural wave-absorbing material is by the described of individual layer
The suction ripple layer composition of ripple layer, impedance matching layer, reflecting layer and multilayer.
4. structural wave-absorbing material as claimed in claim 1, it is characterised in that：The weight of conductive carbon black in the impedance matching layer
Percentage composition is 5%~20%, and the weight percentage for inhaling absorbent in ripple layer is 65%~85%, in the reflecting layer
The weight percentage of chopped carbon fiber is 15%~50%.
5. structural wave-absorbing material as claimed in claim 4, it is characterised in that：The resistivity of the conductive black is not more than 3.0
Ω m, it is (30~50) cm to regard specific volume3/g。
6. structural wave-absorbing material as claimed in claim 4, it is characterised in that：The absorbent includes carbonyl iron dust, ferrite
Powder, iron silicochromium or sendust powder one or more.
7. structural wave-absorbing material as claimed in claim 4, it is characterised in that：Of length no more than 3mm of the chopped carbon fiber,
Resistivity is not more than 1.0 Ω cm.
8. a kind of preparation method of the structural wave-absorbing material as described in any one of claim 1 to 7, it is characterised in that including following
Step：
S1：According to certain ratio prepare macromolecule resin and conductive black, macromolecule resin and absorbent, macromolecule resin and
Chopped carbon fiber；
S2：Macromolecule resin and conductive black, macromolecule resin and absorbent, macromolecule resin and chopped carbon fiber are put respectively
Enter homogenizer to be well mixed, respectively obtain the material for making impedance matching layer, inhaling ripple layer and reflecting layer；
S3：During macromolecule resin material and the material being well mixed separately put into multi-layer co-extruded extruder, by using
Multi-layer co-extruded processing and forming technology, forms wave permeation layer, impedance matching layer, inhales ripple layer and reflecting layer, and be combined into knot respectively
Structure absorbing material.
9. the preparation method of structural wave-absorbing material as claimed in claim 8, it is characterised in that：The multi-layer co-extruded extruder bag
Include at least four double screw extruders, four double screw extruders correspond to respectively the processing wave permeation layer, impedance matching layer,
Inhale ripple layer and reflecting layer.
10. the preparation method of structural wave-absorbing material as claimed in claim 9, it is characterised in that：By controlling twin-screw extrusion
The temperature and rotary speed parameter of machine are come the thickness that adjusts the corresponding wave permeation layer, impedance matching layer, inhale ripple layer or reflecting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080943.5A CN106739321A (en) | 2016-11-30 | 2016-11-30 | A kind of structural wave-absorbing material and preparation method thereof |
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| CN107901306A (en) * | 2017-11-02 | 2018-04-13 | 南京航空航天大学 | The carbon fibre composite efficient microwave curing of impedance matching |
| CN107933007A (en) * | 2017-11-30 | 2018-04-20 | 江西洪都航空工业集团有限责任公司 | A kind of sandwich that can reduce radar return |
| CN107979967A (en) * | 2017-12-22 | 2018-05-01 | 沈阳山磊航空装备制造有限责任公司 | A kind of Wave suction composite material of honeycomb sandwich structure and preparation method thereof |
| CN108081704A (en) * | 2017-12-14 | 2018-05-29 | 航天科工武汉磁电有限责任公司 | A kind of electromagnetism defect packing material and preparation method thereof |
| CN108134213A (en) * | 2017-12-22 | 2018-06-08 | 航天科工武汉磁电有限责任公司 | Wide-band composite wave-absorbing device and its application |
| CN108831637A (en) * | 2018-06-22 | 2018-11-16 | 石家庄杰泰特动力能源有限公司 | A kind of high voltage power cable intelligence label embedding grammar |
| CN109049883A (en) * | 2018-08-29 | 2018-12-21 | 广州大学 | A kind of suction wave composite plate and its application |
| CN109152319A (en) * | 2018-09-18 | 2019-01-04 | 南京波平电子科技有限公司 | The suction wave shell and preparation method thereof of the complex contour structure opposite sex |
| CN109457826A (en) * | 2018-12-13 | 2019-03-12 | 盐城工学院 | A kind of three-decker cement base suction wave plate and preparation method thereof for mixing EP and NGPs wave absorbing agent again |
| CN109940953A (en) * | 2017-12-21 | 2019-06-28 | 洛阳尖端技术研究院 | Double-layer composite wave-absorbing material and preparation method thereof |
| CN110527491A (en) * | 2018-05-23 | 2019-12-03 | 苏州矽美科导热科技有限公司 | A kind of electro-magnetic wave absorption and heat transfer composite material and preparation method |
| CN110802781A (en) * | 2019-09-27 | 2020-02-18 | 浙江瑞堂塑料科技股份有限公司 | Invisible mine shell and preparation method thereof |
| CN110843273A (en) * | 2019-11-26 | 2020-02-28 | 北京天益合新材料科技有限公司 | Wave-absorbing metamaterial |
| CN111171508A (en) * | 2020-03-06 | 2020-05-19 | 苏州世华新材料科技股份有限公司 | Temperature-resistant wave-absorbing material and preparation method thereof |
| CN112029130A (en) * | 2020-08-24 | 2020-12-04 | 电子科技大学 | Natural sedimentation gradient composite wave-absorbing material and preparation method thereof |
| CN112409913A (en) * | 2020-11-19 | 2021-02-26 | 青岛九维华盾科技研究院有限公司 | Light salt-fog-resistant wave-absorbing coating and preparation method thereof |
| CN113337248A (en) * | 2021-06-01 | 2021-09-03 | 浙江原邦材料科技有限公司 | Composite wave-absorbing material and preparation method thereof |
| CN113910718A (en) * | 2021-08-26 | 2022-01-11 | 四川大学 | Electromagnetic shielding composite material with multilayer gradient isolation network and preparation method thereof |
| CN117425326A (en) * | 2023-12-05 | 2024-01-19 | 常州利明屏蔽有限公司 | Electromagnetic shielding plate |
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| CN107901306B (en) * | 2017-11-02 | 2020-07-03 | 南京航空航天大学 | Efficient microwave curing method for impedance-matched carbon fiber composite material |
| CN107901306A (en) * | 2017-11-02 | 2018-04-13 | 南京航空航天大学 | The carbon fibre composite efficient microwave curing of impedance matching |
| CN107933007A (en) * | 2017-11-30 | 2018-04-20 | 江西洪都航空工业集团有限责任公司 | A kind of sandwich that can reduce radar return |
| CN108081704A (en) * | 2017-12-14 | 2018-05-29 | 航天科工武汉磁电有限责任公司 | A kind of electromagnetism defect packing material and preparation method thereof |
| CN109940953A (en) * | 2017-12-21 | 2019-06-28 | 洛阳尖端技术研究院 | Double-layer composite wave-absorbing material and preparation method thereof |
| CN108134213A (en) * | 2017-12-22 | 2018-06-08 | 航天科工武汉磁电有限责任公司 | Wide-band composite wave-absorbing device and its application |
| CN107979967A (en) * | 2017-12-22 | 2018-05-01 | 沈阳山磊航空装备制造有限责任公司 | A kind of Wave suction composite material of honeycomb sandwich structure and preparation method thereof |
| CN110527491A (en) * | 2018-05-23 | 2019-12-03 | 苏州矽美科导热科技有限公司 | A kind of electro-magnetic wave absorption and heat transfer composite material and preparation method |
| CN108831637A (en) * | 2018-06-22 | 2018-11-16 | 石家庄杰泰特动力能源有限公司 | A kind of high voltage power cable intelligence label embedding grammar |
| CN109049883A (en) * | 2018-08-29 | 2018-12-21 | 广州大学 | A kind of suction wave composite plate and its application |
| CN109049883B (en) * | 2018-08-29 | 2020-12-08 | 广州大学 | Wave-absorbing composite board and application thereof |
| CN109152319A (en) * | 2018-09-18 | 2019-01-04 | 南京波平电子科技有限公司 | The suction wave shell and preparation method thereof of the complex contour structure opposite sex |
| CN109457826A (en) * | 2018-12-13 | 2019-03-12 | 盐城工学院 | A kind of three-decker cement base suction wave plate and preparation method thereof for mixing EP and NGPs wave absorbing agent again |
| CN110802781B (en) * | 2019-09-27 | 2021-05-28 | 浙江瑞堂塑料科技股份有限公司 | Invisible mine shell and preparation method thereof |
| CN110802781A (en) * | 2019-09-27 | 2020-02-18 | 浙江瑞堂塑料科技股份有限公司 | Invisible mine shell and preparation method thereof |
| CN110843273A (en) * | 2019-11-26 | 2020-02-28 | 北京天益合新材料科技有限公司 | Wave-absorbing metamaterial |
| CN111171508A (en) * | 2020-03-06 | 2020-05-19 | 苏州世华新材料科技股份有限公司 | Temperature-resistant wave-absorbing material and preparation method thereof |
| CN111171508B (en) * | 2020-03-06 | 2023-04-07 | 苏州世华新材料科技股份有限公司 | Temperature-resistant wave-absorbing material and preparation method thereof |
| CN112029130A (en) * | 2020-08-24 | 2020-12-04 | 电子科技大学 | Natural sedimentation gradient composite wave-absorbing material and preparation method thereof |
| CN112029130B (en) * | 2020-08-24 | 2021-07-06 | 电子科技大学 | Natural sedimentation gradient composite wave-absorbing material and preparation method thereof |
| CN112409913A (en) * | 2020-11-19 | 2021-02-26 | 青岛九维华盾科技研究院有限公司 | Light salt-fog-resistant wave-absorbing coating and preparation method thereof |
| CN113337248A (en) * | 2021-06-01 | 2021-09-03 | 浙江原邦材料科技有限公司 | Composite wave-absorbing material and preparation method thereof |
| CN113910718A (en) * | 2021-08-26 | 2022-01-11 | 四川大学 | Electromagnetic shielding composite material with multilayer gradient isolation network and preparation method thereof |
| CN117425326A (en) * | 2023-12-05 | 2024-01-19 | 常州利明屏蔽有限公司 | Electromagnetic shielding plate |
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