CN106626629B - A kind of rubbery material and preparation method thereof for inhibiting electromagnetic noise - Google Patents
A kind of rubbery material and preparation method thereof for inhibiting electromagnetic noise Download PDFInfo
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- CN106626629B CN106626629B CN201611132048.3A CN201611132048A CN106626629B CN 106626629 B CN106626629 B CN 106626629B CN 201611132048 A CN201611132048 A CN 201611132048A CN 106626629 B CN106626629 B CN 106626629B
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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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/248—All polymers belonging to those covered by group B32B25/00
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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Abstract
The invention discloses a kind of rubbery materials and preparation method thereof for inhibiting electromagnetic noise, it is related to technical field of electronic materials, including electromagnetic noise suppression layer and reflecting layer, the electromagnetic noise suppression layer is multilayer impedance gradual change type material, including two layers of noise absorbent layer: upper layer noise absorbent film and lower layer's noise absorbent film, the upper layer noise absorbent film and the electromagnetic frequency that lower layer noise absorbent film is absorbed be not identical.The present invention includes electromagnetic noise suppression layer and reflecting layer, and double-layer structure makes rubber between layers carry out cross-linking reaction by press cure, form the rubber material of an entirety, its flexibility, tear-proof and impact strength are promoted, service life is able to extend, reduces use cost；And material is relatively simple for structure, electromagnetic noise suppression effect is good, flexibility is good, corrosion resistance is strong, easy to use, preparation process is simple, it is at low cost, can be continuously produced.
Description
Technical field
The present invention relates to technical field of electronic materials, and in particular to a kind of rubbery material for inhibiting electromagnetic noise and
Preparation method.
Background technique
With the development of microwave technology and electronic device, electronic device use needs to transmit signal by radio-frequency apparatus, leads
The power of radio-frequency apparatus is caused to increase sharply, when radio-frequency apparatus use, can generate a large amount of electromagnetic radiation (i.e. electromagnetic noise), meanwhile,
Also electromagnetic wave can be issued when microwave equipment use, generates electromagnetic noise, and excessive electromagnetic noise enters in environment, can generate electromagnetism
Pollution, and adverse effect is caused to human health.
In order to reduce influence of the electromagnetic noise to human body, need to inhibit the function of relevant device external environment transmitting electromagnetic wave
Rate reduces interfering with each other between electromagnetic wave.
Most common electromagnetic noise suppression material mainly includes application type and two kinds compound, wherein application type material
It is that radio-radar absorber and resin binder are mixed and made into coating, is then coated on protection body surface；Compound material is then
Radio-radar absorber is blended in the enhanced electromagnetic noise suppression material being prepared in multi-layer fiber.
Application type and compound material have the disadvantage that when in use: 1, application type electromagnetic noise suppression material mostly uses greatly
Solvent based coating, construction period is longer, and since the thickness distribution uniformity of coating is poor, leads to poor same of inhibitory effect
When, coating surface is more easily damaged, falls off, and service life is shorter, higher operating costs, and the harmful components in coating are to environment
It is affected with the person；2, for compound material there are electromagnetic noise suppression performance is poor, preparation process is complicated, and high production cost makes
It is smaller with range.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of for inhibiting the rubber of electromagnetic noise
Gum base materials and preparation method thereof can preferably inhibit electromagnetic noise and flexibility is good, corrosion resistance is strong, and being able to extend makes
With the period, use cost is reduced.
To achieve the above objectives, the technical solution adopted by the present invention is that:
It is a kind of for inhibiting the rubbery material of electromagnetic noise, including electromagnetic noise suppression layer and reflecting layer, the electromagnetism
Noise suppressed layer is multilayer impedance gradual change type material, including two layers of noise absorbent layer: upper layer noise absorbent film and lower layer's noise are inhaled
Winder, the upper layer noise absorbent film and the electromagnetic frequency that lower layer noise absorbent film is absorbed be not identical；The upper layer noise is inhaled
Winder, lower layer's noise absorbent film include the absorbing material that mass parts are 50~85%；Suction in the upper layer noise absorbent film
Wave material is spherical carbonyl iron powder, and the absorbing material in lower layer's noise absorbent film is sheet type carbonyl iron dust.
Based on the above technical solution, the upper layer noise absorbent film with a thickness of 0.1~0.5mm, the lower layer
Noise absorbent film with a thickness of 0.1~0.5mm, the reflecting layer with a thickness of 0.2~0.5mm.
Based on the above technical solution, the reflecting layer include mass parts be 50~75% conducting powder and 30~
45% rubber solutions, surplus are glass fibre.
Based on the above technical solution, the glass fibre is quartz fibre, high silica fiber or silicon carbide fibre.
A kind of preparation method of the rubbery material for inhibiting electromagnetic noise, comprising the following steps:
S1, mass parts are pressed, 9~15 parts of rubbery collosols is added in the spherical carbonyl iron powder that 1 part of mass concentration is 50~85%
In be uniformly dispersed, the upper layer noise absorbent film with a thickness of 0.01~0.07mm is made；
S2, mass parts are pressed, is that 3.5~4 parts of rubbery collosols are added in 50~85% sheet type carbonyl iron dusts by 1 part of mass concentration
In be uniformly dispersed, lower layer's noise absorbent film with a thickness of 0.01~0.07mm is made；
S3, by mass percentage, the rubber solutions of 50~75% conducting powder and 30~45% are uniformly mixed, are starched
Slurry injection is lined in the mold of glass fibre and is poured, the reflectance coating with a thickness of 0.1~0.3mm is made by material；
S4, it is bonded after suppressing several layers upper layer noise absorbent film, several layers lower layer noise absorbent film respectively, obtains electromagnetism
Noise suppressed layer suppresses several layers reflectance coating to obtain reflecting layer；
S5, electromagnetic noise suppression layer and reflecting layer co-vulcanization are formed, the rubbery material for the electromagnetic noise that is inhibited.
Based on the above technical solution, the rubbery material for inhibiting electromagnetic noise is damaged in the reflection of 1~8GHz
Consumption is respectively less than -6.5dB, and the reflection loss of 8~18GHz is respectively less than -10.4dB, and the reflection loss of absorption peak 12.5GHz is less than -
35dB。
Based on the above technical solution, lower layer's noise suction with a thickness of 0.01~0.07mm is made in the step S2
Winder is specifically includes the following steps: be prepared into the film with a thickness of 0.05mm by casting apparatus curtain coating, during curtain coating
External magnetic field is added, keeps sheet type carbonyl iron dust orderly aligned under the action of the magnetic line of force.
Compared with the prior art, the advantages of the present invention are as follows:
(1) of the invention a kind of for inhibiting the rubbery material of electromagnetic noise, including electromagnetic noise suppression layer and reflection
Layer, and double-layer structure makes rubber between layers carry out cross-linking reaction, forms the rubber material an of entirety by press cure
Material, promotes its flexibility, tear-proof and impact strength, is able to extend service life, reduces use cost；And the structure ratio of material
It is relatively simple, electromagnetic noise suppression effect is good, flexibility is good, corrosion resistance is strong, easy to use, preparation process is simple, it is at low cost, can
Continuous production.
(2) present invention can make sheet type carbonyl iron dust in magnetic force using casting molding processes and external magnetic field directional process
It is orderly aligned under the action of line, the magnetic conductivity for inhaling wave film is promoted, the electromagnetic noise suppression performance of material is improved；1~8GHz's
Reflection loss is respectively less than -6.5dB, and the reflection loss of 8~18GHz is respectively less than -10.4dB, the reflection loss of absorption peak 12.5GHz
Less than -35dB.
Detailed description of the invention
Fig. 1 is in the embodiment of the present invention for inhibiting the structural schematic diagram of the rubbery material of electromagnetic noise.
In figure: 1- electromagnetic noise suppression layer, the reflecting layer 2-, the upper layer 3- noise absorbent film, 4- lower layer noise absorbent film.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of for inhibiting the rubbery material of electromagnetic noise, and one kind is used for
Inhibit the rubbery material of electromagnetic noise, including electromagnetic noise suppression layer 1 and reflecting layer 2, electromagnetic noise suppression layer 1 is multilayer resistance
Anti- gradual change type material, including two layers of noise absorbent layer: upper layer noise absorbent film 3 and lower layer's noise absorbent film 4, upper layer noise absorbent
Film 3 and the electromagnetic frequency that lower layer noise absorbent film 4 is absorbed be not identical.
Material selected by upper layer noise absorbent film 3 and lower layer's noise absorbent film 4 and thickness are carried out all in accordance with actual needs
Setting, in the present embodiment, upper layer noise absorbent film 3 with a thickness of 0.1~0.5mm, lower layer's noise absorbent film 4 with a thickness of 0.1
~0.5mm, reflecting layer 2 with a thickness of 0.2~0.5mm.
Upper layer noise absorbent film 3, lower layer's noise absorbent film 4 include the absorbing material that mass parts are 50~85%, wherein
Absorbing material in upper layer noise absorbent film 3 is spherical carbonyl iron powder, and the absorbing material in lower layer's noise absorbent film 4 is sheet type
Carbonyl iron dust.
Reflecting layer 2 includes that mass parts are 50~75% conducting powder and 30~45% rubber solutions, and surplus is glass fibers
Dimension, glass fibre are quartz fibre, high silica fiber or silicon carbide fibre.
The preparation method for the rubbery material that the present invention also provides a kind of for inhibiting electromagnetic noise, comprising the following steps:
S1, mass parts are pressed, 9~15 parts of rubbery collosols is added in the spherical carbonyl iron powder that 1 part of mass concentration is 50~85%
In be uniformly dispersed, the upper layer noise absorbent film 3 with a thickness of 0.01~0.07mm is made.
S2, mass parts are pressed, is that 3.5~4 parts of rubbery collosols are added in 50~85% sheet type carbonyl iron dusts by 1 part of mass concentration
In be uniformly dispersed, lower layer's noise absorbent film 4 with a thickness of 0.01~0.07mm is made.
S3, by mass percentage, the rubber solutions of 50~75% conducting powder and 30~45% are uniformly mixed, are starched
Slurry injection is lined in the mold of glass fibre and is poured, the reflectance coating with a thickness of 0.1~0.3mm is made by material.
S4, it is bonded after suppressing several layers upper layer noise absorbent film 3, several layers lower layer noise absorbent film 4 respectively, obtains electricity
Magnetic noise inhibition layer 1 suppresses several layers reflectance coating to obtain reflecting layer 2.
S5, electromagnetic noise suppression layer 1 and 2 co-vulcanization of reflecting layer are formed, the rubbery material for the electromagnetic noise that is inhibited.
Wherein, the formula of colloidal sol are as follows: rubber: 100g, organic solvent: 1000g, vulcanizing agent: 6g, vulcanization aid: 2g promotes
Agent: 3g.
Colloidal sol preparation method is (colloidal sol in following all examples is according to said method prepared): according to said ratio by rubber
Glue, vulcanizing agent, vulcanization aid and promotor are added in organic solvent, then keep the temperature 4h at 65 DEG C in an oven, further take out into
Row is dispersed with stirring to whole dissolutions.
The rubber is ethylene propylene diene rubber, and organic solvent is dimethylbenzene, and vulcanizing agent is cumyl peroxide, vulcanization
Auxiliary agent is Zinc oxide powder, and promotor is levelling agent.
It is equal in the reflection loss of 1~8GHz using the rubbery material of inhibition electromagnetic noise prepared by method of the invention
Less than -6.5dB, the reflection loss of 8~18GHz is respectively less than -10.4dB, and the reflection loss of absorption peak 12.5GHz is less than -35dB.
In the following, by 5 embodiments, the present invention is described in detail.
Embodiment 1
S1, the spherical carbonyl iron dust that 100g concentration is 50% is added in 1100g rubbery collosol, carries out ultrasonic emulsification dispersion
Processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.05mm obtains upper layer noise absorbent film 3.
S2, the sheet type carbonyl iron dust that 100g concentration is 75% is added in 366g rubbery collosol, carries out ultrasonic emulsification point
Dissipate processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.05mm adds external magnetic field during curtain coating, arranges sheet type carbonyl iron dust under the action of the magnetic line of force
Orderly, lower layer's noise absorbent film 4 is obtained.
S3, by mass percentage 65% conducting powder is added in 30% rubber solutions, will be conductive by ultrasonic disperse
Powder is uniformly mixed with rubbery collosol, obtains slurry, and slurry injection is lined in the mold of quartz fibre and is poured, at 60 DEG C
5h is kept the temperature, is obtained with a thickness of the reflectance coating of 0.2mm thickness.
S4,5 layers of upper layer noise absorbent film 3 and 5 layer lower layer noise absorbent film 4 are subjected to hot pressing respectively by the way of calendering
Processing, obtains being formed by stacking by the upper layer noise absorbent film 3 with a thickness of 0.7mm and with a thickness of lower layer's noise absorbent film 4 of 0.7mm
Electromagnetic noise suppression absorbing film 1.
S5, electromagnetic noise suppression absorbing film 1 and one layer of reflectance coating arranged from top to bottom, using co-vulcanization moulding process,
Hot-press vulcanization is carried out by drum vulcanizer, curing temperature is 160 DEG C, time 20min, and the electromagnetism that thickness 0.5mm is made is made an uproar
The rubbery material that sound inhibits, wherein electromagnetic noise suppression absorbing membranous layer 1 is with a thickness of 0.3mm, and reflective coating 2 is with a thickness of 0.2mm.
Using the rubbery material of electromagnetic noise suppression prepared by the method for the present embodiment, press down with excellent electromagnetic noise
Effect processed is respectively less than -4dB in the reflection loss of 1~8GHz, and the reflection loss of 8~18GHz is respectively less than -8dB, absorption peak
The reflection loss of 12.5GHz is less than -25dB.
Embodiment 2
S1, the spherical carbonyl iron dust that 100g concentration is 61% is added in 704g rubbery collosol, carries out ultrasonic emulsification dispersion
Processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.07mm obtains upper layer noise absorbent film 3.
S2, the sheet type carbonyl iron dust that 100g concentration is 80% is added in 475g rubbery collosol, carries out ultrasonic emulsification point
Dissipate processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.07mm adds external magnetic field during curtain coating, arranges sheet type carbonyl iron dust under the action of the magnetic line of force
Orderly, lower layer's noise absorbent film 4 is obtained.
S3, by mass percentage 75% conducting powder is added in 20% rubber solutions, will be conductive by ultrasonic disperse
Powder is uniformly mixed with rubbery collosol, obtains slurry, and slurry injection is lined in the mold of high silica fiber and is poured, 60
DEG C heat preservation 5h, obtain with a thickness of the reflectance coating of 0.2mm thickness.
S4,5 layers of upper layer noise absorbent film 3 and 5 layer lower layer noise absorbent film 4 are subjected to hot pressing respectively by the way of calendering
Processing, obtains being formed by stacking by the upper layer noise absorbent film 3 with a thickness of 0.7mm and with a thickness of lower layer's noise absorbent film 4 of 0.7mm
Electromagnetic noise suppression absorbing film 1.
S5, electromagnetic noise suppression absorbing film 1 and one layer of reflectance coating arranged from top to bottom, using co-vulcanization moulding process,
Hot-press vulcanization is carried out by drum vulcanizer, curing temperature is 165 DEG C, time 30min, and the electromagnetism that thickness 1.6mm is made is made an uproar
The rubbery material that sound inhibits, wherein electromagnetic noise suppression absorbing membranous layer 1 with a thickness of 1.4mm, reflective coating 2 with a thickness of
0.2mm。
Using the rubbery material of 1.4mm electromagnetic noise suppression manufactured in the present embodiment, press down with excellent electromagnetic noise
Effect processed is respectively less than -5dB in the reflection loss of 1~8GHz, and the reflection loss of 8~18GHz is respectively less than -9dB, absorption peak 10GHz
Reflection loss be less than -28dB.
Embodiment 3:
S1, the spherical carbonyl iron dust that 100g concentration is 85% is added in 1500g rubbery collosol, carries out ultrasonic emulsification dispersion
Processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.01mm obtains upper layer noise absorbent film 3.
S2, the sheet type carbonyl iron dust that 100g concentration is 85% is added in 400g rubbery collosol, carries out ultrasonic emulsification point
Dissipate processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.01mm adds external magnetic field during curtain coating, arranges sheet type carbonyl iron dust under the action of the magnetic line of force
Orderly, lower layer's noise absorbent film 4 is obtained.
S3, by mass percentage 51% conducting powder is added in 49% rubber solutions, will be conductive by ultrasonic disperse
Powder is uniformly mixed with rubbery collosol, obtains slurry, and slurry injection is lined in the mold of quartz fibre and is poured, at 60 DEG C
5h is kept the temperature, is obtained with a thickness of the reflectance coating of 0.2mm thickness.
S4, upper layer noise absorbent film 3 and lower layer's noise absorbent film 4 be subjected to hot-pressing processing respectively by the way of calendering,
It obtains being formed by stacking by the upper layer noise absorbent film 3 with a thickness of 0.55mm and with a thickness of lower layer's noise absorbent film 4 of 0.55mm
Electromagnetic noise suppression absorbing film 1.
S5, electromagnetic noise suppression absorbing film 1 and one layer of reflectance coating arranged from top to bottom, using co-vulcanization moulding process,
Hot-press vulcanization is carried out by drum vulcanizer, curing temperature is 160 DEG C, time 35min, and the electromagnetism that thickness 1.3mm is made is made an uproar
The rubbery material that sound inhibits, wherein electromagnetic noise suppression absorbing membranous layer 1 is with a thickness of 1.1mm, and reflective coating 2 is with a thickness of 0.2mm.
Using the rubbery material of electromagnetic noise suppression prepared by the method for the present embodiment, press down with excellent electromagnetic noise
Effect processed, the reflection loss of 1~8GHz are respectively less than -6.5dB, and the reflection loss of 8~18GHz is respectively less than -10.4dB, absorption peak
The reflection loss of 6GHz is less than -35dB.
Embodiment 4:
S1, the spherical carbonyl iron dust that 100g concentration is 66% is added in 880g rubbery collosol, carries out ultrasonic emulsification dispersion
Processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.03mm obtains upper layer noise absorbent film 3.
S2, the sheet type carbonyl iron dust that 100g concentration is 82% is added in 750g rubbery collosol, carries out ultrasonic emulsification point
Dissipate processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.03mm adds external magnetic field during curtain coating, arranges sheet type carbonyl iron dust under the action of the magnetic line of force
Orderly, lower layer's noise absorbent film 4 is obtained.
S3, by mass percentage 50% conducting powder is added in 50% rubber solutions, will be conductive by ultrasonic disperse
Powder is uniformly mixed with rubbery collosol, obtains slurry, and slurry injection is lined in the mold of quartz fibre and is poured, at 60 DEG C
5h is kept the temperature, is obtained with a thickness of the reflectance coating of 0.3mm thickness.
S4, upper layer noise absorbent film 3 and lower layer's noise absorbent film 4 be subjected to hot-pressing processing respectively by the way of calendering,
It obtains being formed by stacking by the upper layer noise absorbent film 3 with a thickness of 0.45mm and with a thickness of lower layer's noise absorbent film 4 of 0.45mm
Electromagnetic noise suppression absorbing film 1.
S5, electromagnetic noise suppression absorbing film 1 and one layer of reflectance coating arranged from top to bottom, using co-vulcanization moulding process,
Hot-press vulcanization is carried out by drum vulcanizer, curing temperature is 168 DEG C, time 20min, and the electromagnetism that thickness 1.2mm is made is made an uproar
The rubbery material that sound inhibits, wherein electromagnetic noise suppression absorbing membranous layer 1 is with a thickness of 0.9mm, and reflective coating 2 is with a thickness of 0.3mm.
Using the rubbery material of electromagnetic noise suppression prepared by the method for the present embodiment, press down with excellent electromagnetic noise
Effect processed is respectively less than -6.5dB in the reflection loss of 1~8GHz, and the reflection loss of 8~18GHz is respectively less than -9.5dB, absorption peak
The reflection loss of 5GHz is less than -35dB.
Embodiment 5:
S1, the spherical carbonyl iron dust that 100g concentration is 40% is added in 1400g rubbery collosol, carries out ultrasonic emulsification dispersion
Processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.03mm obtains upper layer noise absorbent film 3.
S2, the sheet type carbonyl iron dust that 100g concentration is 40% is added in 700g rubbery collosol, carries out ultrasonic emulsification point
Dissipate processing, jitter time 30min, then by the uniform slurry of ultrasonic disperse by casting apparatus be cast be prepared into a thickness of
The film of 0.03mm adds external magnetic field during curtain coating, arranges sheet type carbonyl iron dust under the action of the magnetic line of force
Orderly, lower layer's noise absorbent film 4 is obtained.
S3, by mass percentage 67% conducting powder is added in 33% rubber solutions, will be conductive by ultrasonic disperse
Powder is uniformly mixed with rubbery collosol, obtains slurry, and slurry injection is lined in the mold of quartz fibre and is poured, at 60 DEG C
5h is kept the temperature, is obtained with a thickness of the reflectance coating of 0.2mm thickness.
S4, upper layer noise absorbent film 3 and lower layer's noise absorbent film 4 be subjected to hot-pressing processing respectively by the way of calendering,
It obtains being formed by stacking by the upper layer noise absorbent film 3 with a thickness of 0.15mm and with a thickness of lower layer's noise absorbent film 4 of 0.15mm
Electromagnetic noise suppression absorbing film 1.
S5, electromagnetic noise suppression absorbing film 1 and one layer of reflectance coating arranged from top to bottom, using co-vulcanization moulding process,
Hot-press vulcanization is carried out by drum vulcanizer, curing temperature is 160 DEG C, time 20min, and the electromagnetism that thickness 0.5mm is made is made an uproar
The rubbery material that sound inhibits, wherein electromagnetic noise suppression absorbing membranous layer 1 is with a thickness of 0.3mm, and reflective coating 2 is with a thickness of 0.2mm.
Using the rubbery material of electromagnetic noise suppression prepared by the method for the present embodiment, press down with excellent electromagnetic noise
Effect processed is respectively less than -4dB in the reflection loss of 1~8GHz, and the reflection loss of 8~18GHz is respectively less than -8dB, absorption peak
The reflection loss of 12.5GHz is less than -25dB.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several 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 being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (4)
1. a kind of preparation method of the rubbery material for inhibiting electromagnetic noise, it is characterised in that: the following steps are included:
S1, mass parts are pressed, the spherical carbonyl iron powder that 1 part of mass concentration is 50~85% is added in 9~15 parts of rubbery collosols and is divided
It dissipates uniformly, the upper layer noise absorbent film (3) with a thickness of 0.01~0.07mm is made；
S2, mass parts are pressed, is to divide in 50~85% sheet type carbonyl iron dusts, 3.5~4 parts of rubbery collosols of addition by 1 part of mass concentration
It dissipates uniformly, lower layer's noise absorbent film (4) with a thickness of 0.01~0.07mm is made；
S3, by mass percentage, the rubber solutions of 50~75% conducting powder and 30~45% are uniformly mixed, slurry is obtained,
Slurry injection is lined in the mold of glass fibre and is poured, the reflectance coating with a thickness of 0.1~0.3mm is made；
S4, it is bonded after suppressing several layers upper layer noise absorbent film (3), several layers lower layer noise absorbent film (4) respectively, obtains electricity
Magnetic noise inhibition layer (1) suppresses several layers reflectance coating to obtain reflecting layer (2)；
S5, electromagnetic noise suppression layer (1) and reflecting layer (2) co-vulcanization are formed, the rubbery material for the electromagnetic noise that is inhibited.
2. a kind of preparation method of the rubbery material for inhibiting electromagnetic noise as described in claim 1, it is characterised in that:
The rubbery material for inhibiting electromagnetic noise is respectively less than -6.5dB, the reflection damage of 8~18GHz in the reflection loss of 1~8GHz
Consumption is respectively less than -10.4dB, and the reflection loss of absorption peak 12.5GHz is less than -35dB.
3. a kind of preparation method of the rubbery material for inhibiting electromagnetic noise as described in claim 1, it is characterised in that:
Lower layer's noise absorbent film (4) with a thickness of 0.01~0.07mm is made in the step S2 specifically includes the following steps: passing through stream
Rolling equipment curtain coating is prepared into the film with a thickness of 0.05mm, adds external magnetic field during curtain coating, makes sheet type carbonyl iron
Powder is orderly aligned under the action of the magnetic line of force.
4. a kind of preparation method of the rubbery material for inhibiting electromagnetic noise as described in claim 1, it is characterised in that:
The glass fibre is quartz fibre, high silica fiber or silicon carbide fibre.
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| CN103895277A (en) * | 2014-04-11 | 2014-07-02 | 江苏悦达新材料科技有限公司 | Graphite film/heat-conducting silica gel/graphene composite radiating fin and preparation method for same |
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| CN103895277A (en) * | 2014-04-11 | 2014-07-02 | 江苏悦达新材料科技有限公司 | Graphite film/heat-conducting silica gel/graphene composite radiating fin and preparation method for same |
Non-Patent Citations (1)
| Title |
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| 张晓林.石墨烯复合材料的制备及吸波性能.《中国优秀硕士学位论文全文数据库工程科技I辑》.2012,第9,16-19,30-32,54页. * |
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Application publication date: 20170510 Assignee: CHANGSHA ADVANCED MATERIALS INDUSTRIAL RESEARCH INSTITUTE Co.,Ltd. Assignor: AEROSPACE SCIENCE AND INDUSTRY WUHAN MAGNETISM ELECTRON Co.,Ltd. Contract record no.: X2021980015078 Denomination of invention: The invention relates to a rubber based material for suppressing electromagnetic noise and a preparation method thereof Granted publication date: 20181204 License type: Common License Record date: 20211222 |