CN107722605A - A kind of rubber-based low frequency wave absorbing patch and preparation method thereof - Google Patents
A kind of rubber-based low frequency wave absorbing patch and preparation method thereof Download PDFInfo
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- CN107722605A CN107722605A CN201710984570.2A CN201710984570A CN107722605A CN 107722605 A CN107722605 A CN 107722605A CN 201710984570 A CN201710984570 A CN 201710984570A CN 107722605 A CN107722605 A CN 107722605A
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- wave absorbing
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- low frequency
- absorbing patch
- frequency wave
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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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
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to rubber-based low frequency wave absorbing patch and preparation method thereof.The raw material of the wave absorbing patch is by polyurethane rubber：Stearic acid：Carbonyl iron absorbent：Coupling agent：Vulcanizing agent：Crosslinking coagent=100：1：(883.7‑964.1)：(8.8‑19.3)：3：2 compositions.Raw material prepares wave absorbing patch by heat cure shaping technique again after preparing.Reflectivity≤6dB in the range of reflectivity≤3dB in the range of 3~4GHz of the wave absorbing patch, 4~8GHz, wherein≤8dB bandwidth is not less than 2GHz.Adhesive force >=3MPa, impact strength >=50cm, pliability≤1mm, tensile strength average value >=4.0MPa, elongation rate of tensile failure average value >=80%.The low frequency wave absorbing patch can not only effectively improve its low frequency electrical property, and the mechanical property of paster increases substantially.Raw material is easy to get, simple production process, cost are low, is adapted to large-scale production.
Description
Technical field
The invention belongs to electromagnetic wave absorbent material field, and in particular to be a kind of rubber-based low frequency wave absorbing patch and its system
Preparation Method.
Background technology
Patch-type absorbing material due to the advantages that can accurately controlling its thickness, performance in advance to detect and be easy to use,
More and more extensive application is obtained in absorbing material.Wave absorbing patch is mainly made up of absorbent and adhesive two parts, its
Middle absorbent provides the electromagnetic performance needed for absorbing material, and adhesive is the carrier of absorbent, plays carrying absorbent and its
The effect of its filler, determine physical and mechanical property and environmental resistance of absorbing material etc..It is different according to adhesive used, patch
Piece type absorbing material can be divided into sheet rubber, potsherd and plastic sheet etc..The outstanding advantages of potsherd are high temperature resistants, can be born harsh
Corrosive environment and at a high speed wash away, its shortcoming is poor toughness, and thermal shock resistance is not strong；Plastic sheet then refers to thermosetting or thermoplastic
Property high molecule plastic (or resin) be matrix absorbing material, do not possess typically flexible or flexible poor, it is impossible to be used in bending
Surface, its mechanical strength the higher person is often but also as structural wave-absorbing material；Rubber wave absorbing patch is relatively soft, can be used for bending
Surface, by selecting suitable rubber base material, the various feelings for there are special requirement to weatherability, environmental resistance can be used in
Under condition, therefore, rubber-type paster is the main Types of domestic and international paster absorbing material.
At present, absorbing material faces the high request of " thin, light, wide, strong " etc., conventional absorbing material thickness, density,
Absorptivity, inhale and mutually restricted on wave frequency band, to realize the low frequency absorbing property under lower thickness, the agent of generally use pieces of absorbent or
Person adds the low cost spherical absorbent of high content.In general, filling concentration is higher, and the absorbing material of same thickness inhales wave energy
Power is stronger, and low-frequency effect is better.But too high absorbent filling concentration, the adding proportion of radar absorbing particles is high, and absorbing material is close
Degree is big, the rubber paster tensile strength of material after shaping can be caused to reduce, mechanical mechanics property decline.Meanwhile pieces of absorbent agent
Cost is high, and calendering process is undesirable, how using the absorbent that supportability is strong, cost is low to prepare low frequency wave absorbing patch, and
It is the technological difficulties of rubber-based low cost wave absorbing patch with good mechanical property.
The content of the invention
The present invention is ground by the key technologies such as the spherical absorption agent of low cost and high filling high tenacity rubbery system formula
Study carefully, break through high-selenium corn agent content wave absorbing patch molding technology thereof.The present invention provides a kind of rubber-based low cost low frequency and inhales ripple patch
Piece and preparation method thereof, can be obviously improved filling concentration (reaching 89%), the paster can not only ensure 1.0mm ±
Its low frequency electrical property is effectively improved in the case of 0.1mm thickness, and can increase substantially the mechanical property of paster, was prepared
Chemical process control that need not be complicated in journey or professional auxiliary equipment, operation facility, cost are relatively low.
The present invention solves the technical scheme that technical problem uses：
A kind of rubber-based low frequency wave absorbing patch, by weight, the raw material of the material is by polyurethane rubber：Stearic acid：Carbonyl
Base iron absorbent：Coupling agent：Vulcanizing agent：Crosslinking coagent=100：1：(883.7-964.1)：(8.8-19.3)：3：2 compositions.Institute
It is carbonyl iron dust absorbent to state absorbent；Tap density >=4.0g/cm3；Electromagnetic parameter average value under 2GHz：Permittivity ε '
≤ 35, dielectric loss ε "≤5.2, magnetic permeability μ ' >=4.5, magnetic loss μ " >=3.0.
The wave absorbing patch carries out surface treatment modification, silane coupler using the silane coupler with double bond to absorbent
One end of molecule hydrolyzes in absorbent surface, is combined with the hydroxyl of absorbent surface, the other end is due to containing double bond, in heat
It is crosslinked in sulfidation with polyurethane rubber molecule, the mechanical property of stealthy paster can be improved.
The invention also discloses the preparation method of the rubber-based low frequency wave absorbing patch, by above-mentioned outfit raw material, using heat
Prepared by sulfidization molding technique, process chart is shown in Fig. 1.
The thickness that wave absorbing patch is prepared is 1.0mm ± 0.1mm, surface density≤5.0kg/m2。
The invention has the advantages that：
1st, low frequency wave absorbing patch of the present invention, its wave absorbing agent use inexpensive carbonyl iron dust, have stronger electro-magnetic wave absorption
Characteristic, in the range of 3~4GHz≤- 4.29dB, 4~8GHz in the range of reflectivity≤- 6.32dB, wherein a width of less than -8dB band
3.36GHz。
2nd, pass through coupling agent treatment as rubber matrix, inexpensive absorbent using polyether types of polyurethane rubber, pass through
It is kneaded and absorbing material is prepared with hot-forming；The absorbing material can not only effectively improve its low frequency electrical property, Er Qieke
Increase substantially the mechanical property of paster.Tensile strength average value 7.1Mpa is detected by GB/T 528-2009, by GB/T
528-2009 detection elongation rate of tensile failure average value 137%.
3rd, general absorbing material is higher with absorbent cost, about 1000 yuan/kg, the iron powder absorbent that uses of the present invention for
100 yuan/kg, unit price is only original 1/10, and its raw material is easy to get, simple production process, cost is low, is adapted to large-scale production.
Brief description of the drawings
Fig. 1 is rubber-based low frequency wave absorbing patch preparation technology flow chart.
Fig. 2 is the reflectance map that embodiment 1~4 prepares rubber-based low frequency wave absorbing patch.
Embodiment
It is the specific implementation case of the present invention below, notices that these cases are merely to illustrate the present invention rather than limitation originally
The scope of invention.
Embodiment 1：Comparative example
A kind of rubber-based low cost low frequency wave absorbing patch, the rubber-based low cost low frequency wave absorbing patch is mainly by absorbent
Formed with rubber matrix, the absorbent is carbonyl iron dust absorbent, and described matrix is silicone rubber matrix；The rubber-based low frequency
The composition of wave absorbing patch and the parts by weight of component are as follows：
The preparation method of above-mentioned wave absorbing patch mainly comprises the following steps：
Weighing is carried out by formula, load weighted raw-silastic continuously is put into dog-house above two rollers on a mill and breaks glue
In flakes, then it is gradually added and weighs good and premix and get togather the carbonyl iron dust of coupling agent and be gradually added dog-house, adjusts roll spacing, it is constantly mixed
Refining；Mixed sheet is taken out, is placed in the pallet of cleaning and cools down more than 30min；Regulating roller is away from the above-mentioned sizing material cooled down is put into
Dog-house, allows its bag roller, and is gradually added double two or five vulcanizing agents and constantly turns refining；The slice after the smooth bubble-free in surface, adjust roller
Film stock thickness is set to be (2.3-2.6) mm away from tune.Full wafer mixed sheet is put into die cavity centre position, size be about 330mm ×
220mm × 2.5mm, the hot pressing 10-20min under (155 ± 5) DEG C, (23 ± 2) MPa, rubber paster carefully keeps flat paving after the demoulding
Have and cooled down on the smooth table top of polytetrafluoroethylglass glass cloth, that is, obtain the rubber-based low cost low frequency wave absorbing patch of the present invention.
The above-mentioned thickness that absorbing material is prepared is 0.98mm；Surface density is 4.8kg/m2；Adhesive force 1.65Mpa (from
Actual use >=3MPa technical requirements gap is larger)；Pliability 1mm；Impact strength 50cm.Fig. 2 prepares under the conditions of this low
Reflectivity≤- 6.10dB in the range of cost low frequency wave absorbing patch reflectivity≤- 4.0dB in the range of 3~4GHz, 4~8GHz；Its
In be less than -8dB a width of 3.2GHz of band.
Embodiment 2：
A kind of rubber-based low cost low frequency wave absorbing patch, the rubber-based low cost low frequency wave absorbing patch is mainly by absorbent
Formed with rubber matrix, the absorbent is carbonyl iron dust absorbent, and described matrix is polyurethane rubber matrix；The rubber-based
The composition of low frequency wave absorbing patch and the parts by weight of component are as follows：
The preparation method of above-mentioned wave absorbing patch mainly comprises the following steps：
Weighing is carried out by formula, load weighted polyurethane rubber is put into dog-house above two rollers on a mill and breaks glue
In flakes, then it is gradually added load weighted stearic acid and is plasticated；It will weigh good and premix and get togather the iron powder of coupling agent and be gradually added
Dog-house, roll spacing is adjusted, is constantly kneaded；Mixed sheet is taken out, is placed in the pallet of cleaning and cools down more than 30min；Regulating roller away from
The above-mentioned sizing material cooled down is put into dog-house, allows its bag roller, and is gradually added the mixed of double two or five vulcanizing agents and crosslinking coagent TAC
Compound constantly turns refining；The slice after the smooth bubble-free in surface, adjustment roll spacing, which is adjusted, makes film stock thickness be (2.3-2.6) mm.By full wafer
Mixed sheet is put into die cavity centre position, and size is about 330mm × 220mm × 2.5mm, in (155 ± 5) DEG C, (23 ± 2) MPa
Lower hot pressing 10-20min, rubber paster carefully keeps flat and cooled down on the smooth table top for be covered with polytetrafluoroethylglass glass cloth after the demoulding,
Obtain the rubber-based low frequency wave absorbing patch of the present invention.
The above-mentioned thickness that absorbing material is prepared is 1.06mm；Surface density is 4.92kg/m2；Adhesive force 3.72Mpa；It is soft
Toughness 1mm；Impact strength 50cm；Tensile strength average value 6.30MPa, minimum 6.06Mpa；Elongation rate of tensile failure average value
85.52%, minimum 72.7%.It is anti-in the range of material reflectivity≤- 4.3dB in the range of 3~4GHz in Fig. 2,4~8GHz
Rate≤- 6.3dB is penetrated, wherein a width of 3.1GHz of band less than -8dB.
Embodiment 3：
A kind of rubber-based low cost low frequency wave absorbing patch, the rubber-based low cost low frequency wave absorbing patch is mainly by absorbent
Formed with rubber matrix, the absorbent is carbonyl iron dust absorbent, and described matrix is polyurethane rubber matrix；The rubber-based
The composition of low frequency wave absorbing patch and the parts by weight of component are as follows：
The preparation method of above-mentioned wave absorbing patch is the same as embodiment 2.
The above-mentioned thickness that absorbing material is prepared is 1.03mm；Surface density is 4.76kg/m2；Adhesive force 4.6Mpa；It is soft
Toughness 1mm；Impact strength 50cm；Tensile strength average value 6.7MPa, minimum 6.6Mpa；Elongation rate of tensile failure average value 82%,
Minimum 73%.Reflectivity≤- 5.8dB in the range of the material reflectivity≤- 3.9dB in the range of 3~4GHz, 4~8GHz, its
In be less than -8dB a width of 3.05GHz of band.
Embodiment 4：
A kind of rubber-based low cost low frequency wave absorbing patch, the rubber-based low cost low frequency wave absorbing patch is mainly by absorbent
Formed with rubber matrix, the absorbent is carbonyl iron dust absorbent, and described matrix is polyurethane rubber matrix；The rubber-based
The composition of low frequency wave absorbing patch and the parts by weight of component are as follows：
The preparation method of above-mentioned wave absorbing patch is the same as embodiment 2.
The above-mentioned thickness that absorbing material is prepared is 1.03mm；Surface density is 4.79kg/m2；Adhesive force 7.15Mpa；It is soft
Toughness 1mm；Impact strength 50cm；Tensile strength average value 7.1MPa, minimum 7.0Mpa；Elongation rate of tensile failure average value 137%,
Minimum 131%.Fig. 2 shows reflectivity in the range of the material reflectivity≤- 4.29dB in the range of 3~4GHz, 4~8GHz
≤ -6.32dB, wherein a width of 3.36GHz of band less than -8dB.
As fully visible, embodiments of the invention are by adjusting absorbent contents, different rubbery systems, coupling agent addition etc.
Carry out the absorbing property of controlled material, the rubber-based wave absorbing patch finally obtained is in the case of 1mm left and right thicknesses, 3~8GHz frequency ranges
Possess preferable absorbing property, and maintain mechanical property excellent under high filling concentration of absorbing (89%).
Claims (4)
1. a kind of rubber-based low frequency wave absorbing patch, it is characterised in that by weight, the raw material of the material is by polyurethane rubber：
Stearic acid：Carbonyl iron absorbent：Coupling agent：Vulcanizing agent：Crosslinking coagent=100：1：(883.7-964.1)：(8.8-19.3)：3：
2 compositions.
2. rubber-based low frequency wave absorbing patch according to claim 1, it is characterised in that the carbonyl iron dust absorbent, be
Grey or dark gray powder；Tap density >=4.0g/cm3；Electromagnetic parameter average value under 2GHz：Permittivity ε '≤35, it is situated between
Electrical loss ε "≤5.2, magnetic permeability μ ' >=4.5, magnetic loss μ " >=3.0.
3. rubber-based low frequency wave absorbing patch according to claim 1, it is characterised in that there is stronger low frequency electrical property, 3
Reflectivity≤- 6.32dB in the range of reflectivity≤- 4.29dB in the range of~4GHz, 4~8GHz, wherein≤- 8dB band is a width of
3.36GHz；Mechanical property increases substantially, tensile strength average value 7.1MPa, elongation rate of tensile failure 137%.
4. the preparation method of rubber-based low frequency wave absorbing patch described in claim 1, it is characterised in that be equipped with by weight following former
Material, polyurethane rubber：Stearic acid：Carbonyl iron absorbent：Coupling agent：Vulcanizing agent：Crosslinking coagent=100：1：(883.7-
964.1)：(8.8-19.3)：3：2；Prepared again by heat cure shaping technique.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710984570.2A CN107722605A (en) | 2017-10-20 | 2017-10-20 | A kind of rubber-based low frequency wave absorbing patch and preparation method thereof |
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| CN201710984570.2A CN107722605A (en) | 2017-10-20 | 2017-10-20 | A kind of rubber-based low frequency wave absorbing patch and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109651799A (en) * | 2018-12-19 | 2019-04-19 | 航天科工武汉磁电有限责任公司 | Wave absorbing patch, preparation method and its application |
| CN111040453A (en) * | 2019-12-11 | 2020-04-21 | 中国航空制造技术研究院 | Silicone rubber-based wave-absorbing patch and preparation method thereof |
| CN112996438A (en) * | 2018-09-20 | 2021-06-18 | 凸版印刷株式会社 | Patch for examination |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271437A (en) * | 2015-10-29 | 2016-01-27 | 南京南大波平电子信息有限公司 | Method for preparing carbonyl iron powder absorbent for low-frequency electromagnetic wave absorption material |
| CN107141763A (en) * | 2017-05-22 | 2017-09-08 | 怀化学院 | Flexible high dielectric thin film of a kind of Inorganic whisker and preparation method thereof |
-
2017
- 2017-10-20 CN CN201710984570.2A patent/CN107722605A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271437A (en) * | 2015-10-29 | 2016-01-27 | 南京南大波平电子信息有限公司 | Method for preparing carbonyl iron powder absorbent for low-frequency electromagnetic wave absorption material |
| CN107141763A (en) * | 2017-05-22 | 2017-09-08 | 怀化学院 | Flexible high dielectric thin film of a kind of Inorganic whisker and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112996438A (en) * | 2018-09-20 | 2021-06-18 | 凸版印刷株式会社 | Patch for examination |
| CN109651799A (en) * | 2018-12-19 | 2019-04-19 | 航天科工武汉磁电有限责任公司 | Wave absorbing patch, preparation method and its application |
| CN111040453A (en) * | 2019-12-11 | 2020-04-21 | 中国航空制造技术研究院 | Silicone rubber-based wave-absorbing patch and preparation method thereof |
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Application publication date: 20180223 |