CN107123499A - A kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece and preparation method thereof - Google Patents
A kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece and preparation method thereof Download PDFInfo
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- CN107123499A CN107123499A CN201710439838.4A CN201710439838A CN107123499A CN 107123499 A CN107123499 A CN 107123499A CN 201710439838 A CN201710439838 A CN 201710439838A CN 107123499 A CN107123499 A CN 107123499A
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- ball
- electromagnetic noise
- high temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14791—Fe-Si-Al based alloys, e.g. Sendust
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soft Magnetic Materials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Suppress piece the invention discloses a kind of high-flexibility high temperature resistant electromagnetic noise, including by weight：100 parts of magnetic；5~20 parts of binding agent；1~10 part of plasticizer；100~200 parts of organic solvent；Plasticizer is the one or more in the good resin of pliability and other high molecular polymers, including polyester resin, modified epoxy, hydrogenated petroleum resin and organic siliconresin.The invention also discloses the preparation method that a kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece.The present invention has environmentally friendly, excellent pliability and high-temperature stability.
Description
Technical field
The invention belongs to technical field of electromagnetic compatibility, and in particular to a kind of high-flexibility high temperature resistant electromagnetic noise suppress piece and
Its preparation method.
Background technology
With the fast development of electronic science and technology, various electronic equipments are widely used, and this will necessarily cause greatly
The electromagnetism leaked wave of amount.Contamination of Electromagnetic Wave is had become after noise pollution, water pollution, atmosphere pollution and solid pollution again
One big public hazards.Nowadays, the trend of the oriented high frequency development of the frequency of use of one side electronic equipment, the energy of electromagnetic wave outside radiation
Also it is more and more.According to statistics, the energy of electromagenetic wave radiation is increased with annual 7%-12%, and electromagnetic pollution is increasingly serious.The opposing party
Face, because electronic equipment using digitlization, integrated, signal level small quantization realizes lightweight, high speed and miniaturization
Demand, so being easy to be produced misoperation by the interference of external electromagnetic ripple, brings inestimable consequence.
According to statistics, the whole world is every year due to just up to 500,000,000 dollars, therefore electromagnetic interference of economic loss caused by electromagnetic interference
(Electromagnetic Interference, abbreviation EMI) by legislation and is formulated standard by the common concern of various countries
To control amount of electromagnetic radiation.Current many countries, such as U.S., Japan, European Union formulate and have enforced a whole set of electromagnetism
Compatibility standard.Because China's industrial foundation is relatively weak, less extensively, electromagnetic pollution problem does not show electronic apparatus application
Write, so the understanding and research to electromagnetic compatibility are later.In the 1990s, fast with Chinese national economy and new and high technology
Speed development, in departments such as communication, military affairs, electronics, electromagnetic compatibility obtains very big attention, establishes in a collection of experiment and research
The heart, electromagnetic compatibility theory is rapidly progressed.2003, China started to enforce Electromagnetic Compatibility authentication (China
Certification Center for Electromagnetic Compatibility, abbreviation CEMC certification) certification system
Degree.
Electromagnetic interference is the electromagnetic energy sent by electromagnetic interference source, is transmitted to sensitive equipment, and causes it to produce " response ",
So as to produce the effect of interference.For effective suppression electromagnetic interference phenomenon, made an uproar except reducing electromagnetism by Optimization Design of Electronic Circuits
Outside sound, electromagnetic shielding material and absorbing material can also be used.Electromagnetic shielding is to prevent from leaking by enclosed signal source and electromagnetic wave
Or electromagnetic wave incident is reflected back to its surface.And absorbing material is the form converted by energy, by electromagnetic energy
It is lost, loses into the energy (such as mechanical energy, heat energy, electric energy) of other forms.The electromagnetism of electromagnetic wave leaks needs largely
Absorbing material eliminating, absorb, decay, so absorbing material is just being widely used in the neck such as Aero-Space, communication, electronic apparatus
Domain, is more and more widely paid attention to.For the increasingly severe electromagnetism of the development trend and gigahertz frequency range of electronic equipment
Compatibling problem, the electromagnetic compatibility such as TDK, NEC-TOKIN, Hitach-Metal, Intermark, FDK, Daido-Steel, Nitta
Element company, develops noise suppression sheet (Noise Suppression Sheet).Noise suppression sheet, with such as
Lower feature：Applying frequency scope wide (30MHz~10GHz), operating temperature range big (- 40 DEG C~+85 DEG C), pliability are good, easy
Cut, attachment is convenient and meets RoHs environmental requirements etc..Noise suppression sheet is made up of magnetic and organic system, according to
Following steps are prepared：Magnetic, organic solvent, binding agent, plasticizer and other auxiliary agents are added in ball grinder and carry out ball milling,
Vacuum defoamation, obtains casting slurry, then carries out slurry to obtain cast sheet after curtain coating drying, then cast sheet progress hot pressing is obtained
To noise suppression piece.Existing frequently-used high temperature resistant binder has polytetrafluoroethylene (PTFE), polyvinyl chloride, Petropols, polymethyl
Some in sour methyl esters and other resins etc., these resins contain halogen such as polytetrafluoroethylene (PTFE) and polyvinyl chloride, are not inconsistent cyclization
Protect RoHs laws and regulations requirements, resin such as Petropols, polymethyl methacrylate in addition and other most of resins it is flexible
Property is poor, and in order to improve the pliability of noise suppression piece, it is necessary to add plasticizer, and the addition of plasticizer can reduce the glass of resin
Glass conversion temperature Tg, so as to reduce the high-temperature stability of noise suppression piece.
The content of the invention
The invention provides a kind of formula and preparation by choosing suitable magnetic, binding agent and plasticising and adjusting material
Process conditions, comply with environmentally friendly RoHs laws and regulations requirements and have the high-flexibility of excellent pliability and high-temperature stability resistance to
High-temperature electromagnetic noise suppression piece.
Suppress the preparation of piece another object of the present invention is to provide a kind of above-mentioned high-flexibility high temperature resistant electromagnetic noise
Method.
The purpose of the present invention is achieved through the following technical solutions：A kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece, bag
Include by weight：
Plasticizer is the good resin and other high molecular polymers of pliability, including polyester resin, modified epoxy, hydrogen
One or more in fossil oleoresin and organic siliconresin.
The magnetic includes the one or more in iron sial, iron silicochromium, iron nickel and iron tantnickel.
The binding agent is highly viscous high molecular polymer, including polyvinyl butyral resin, polyvinyl alcohol contracting ethanol, second
One or more in base cellulose, cellulose acetate-butyrate and polyurethane.
The organic solvent is in benzene, ethanol, toluene, dimethylbenzene, ethyl acetate, cyclohexanone, bromochloromethane and propyl alcohol
It is one or more of.
Above-mentioned high-flexibility high temperature resistant electromagnetic noise suppresses the preparation method of piece, comprises the following steps：
1) magnetic of 100 mass parts is added in ball grinder, and adds the ball-milling medium of 200 mass parts, added organic
100~200 parts of solvent, Ball-milling Time is 4~8 hours, magnetic is fully soaked and is uniformly dispersed in organic solvent；
2) 1~10 part of 5~20 parts of binding agent and plasticizer are added by weight, and Ball-milling Time is 14~22 hours；
3) undissolved binding agent and plasticizer and the magnetic reunited are filtered to remove, vacuum defoamation removes ball milling mistake
Slurry used in being cast after the bubble produced in journey；
4) with the viscosity of digital viscometer slurry, the viscosity of slurry should be between 1000~3000mPas, if slurry
Viscosity is too low, and slurry is easily settled, and phosphoric acid is too high, is difficult curtain coating；
5) slurry is poured into stainless steel coating device inner chamber, be at the uniform velocity coated with the substrate for scribble mould release membrance；
6) wet film bottom is carried out being heated to 40~60 DEG C, it is i.e. peelable after drying 1 hour；
7) hot press is opened and is heated to 100 DEG C, if then the magnetic sheet dry film obtained after dry plate curtain coating is put into compression molding
After matched moulds after in machine heating plate, preheating 3~8 seconds, then hot press is forced into 150kg/cm2, pressure is 15MPa, 10~20 seconds
After mold, then matched moulds 3~15 seconds removes the bubble of magnetic sheet both sides, and die sinking is cooled down, you can obtain last product after taking-up.
The magnetic includes the one or more in iron sial, iron silicochromium, iron nickel and iron tantnickel；The binding agent is
Highly viscous high molecular polymer, including polyvinyl butyral resin, polyvinyl alcohol contracting ethanol, ethyl cellulose, acetate butyrate are fine
One or more in dimension element and polyurethane；The organic solvent be benzene, ethanol, toluene, dimethylbenzene, ethyl acetate, cyclohexanone,
One or more in bromochloromethane and propyl alcohol.
The step 1) in ball-milling medium be steel ball, carbon steel ball and zirconium ball in one or more.
The step 1) in ball-milling medium and magnetic mass ratio 1:1~7:Between 1.
The present invention has the following advantages and effect relative to prior art：
The present invention is from polyvinyl butyral resin, polyvinyl alcohol contracting ethanol, ethyl cellulose, cellulose acetate-butyrate and gathers
The high viscosity high temperature-resistant polymer polymer such as urethane is as binding agent, and they are soluble in organic solvent, with superior crosslinking
Property and compatibility (compatible with various resins and auxiliary agent, and rise cross-linking reaction), high glass transition temperature Tg, viscosity stabilization and controllable
Property, it is a kind of environment-friendly Halogen binding agent, and these binding agents have the effect of dispersant concurrently, can be by dispersed-powder
Disperse in the slurry.Plasticising is used as from polyester resin, modified epoxy, hydrogenated petroleum resin and organic siliconresin etc.
Agent, they be soluble in organic solvent, high glass transition temperature Tg and good compatibility (it is compatible with various resins and auxiliary agent,
And play cross-linking reaction), only because their viscosity is too low, it is unfavorable for being cast and cannot function as binding agent to use, but by
There is good pliability in them, and these high molecular polymers are inserted between binding agent high polymer long chain, are prevented
Crosslinked between binding agent high polymer long chain, the movement of increase binding agent macromolecule connection, so that the pliability to improve sample, and
The glass transition temperature Tg of binding agent will not change.
Embodiment
With reference to embodiment, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
Embodiment 1
A kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece, including by weight：
Plasticizer is the good resin and other high molecular polymers of pliability, including polyester resin, modified epoxy, hydrogen
One or more in fossil oleoresin and organic siliconresin.
Magnetic in the present embodiment includes the one or more in iron sial, iron silicochromium, iron nickel and iron tantnickel；Binding agent is
Highly viscous high molecular polymer, including polyvinyl butyral resin, polyvinyl alcohol contracting ethanol, ethyl cellulose, acetate butyrate are fine
One or more in dimension element and polyurethane；Organic solvent is benzene, ethanol, toluene, dimethylbenzene, ethyl acetate, cyclohexanone, bromine chlorine
One or more in methane and propyl alcohol.
Above-mentioned high-flexibility high temperature resistant electromagnetic noise suppresses the preparation method of piece, comprises the following steps：
1) magnetic of 100 mass parts is added in ball grinder, and adds the ball-milling medium of 200 mass parts, added organic
100~200 parts of solvent, Ball-milling Time is 4~8 hours, magnetic is fully soaked and is uniformly dispersed in organic solvent；
2) 1~10 part of 5~20 parts of binding agent and plasticizer are added by weight, and Ball-milling Time is 14~22 hours；
3) undissolved binding agent and plasticizer and the magnetic reunited are filtered to remove, vacuum defoamation removes ball milling mistake
Slurry used in being cast after the bubble produced in journey；
4) with the viscosity of digital viscometer slurry, the viscosity of slurry should be between 1000~3000mPas, if slurry
Viscosity is too low, and slurry is easily settled, and phosphoric acid is too high, is difficult curtain coating；
5) slurry is poured into stainless steel coating device inner chamber, be at the uniform velocity coated with the substrate for scribble mould release membrance；
6) wet film bottom is carried out being heated to 40~60 DEG C, it is i.e. peelable after drying 1 hour；
7) hot press is opened and is heated to 100 DEG C, if then the magnetic sheet dry film obtained after dry plate curtain coating is put into compression molding
After matched moulds after in machine heating plate, preheating 3~8 seconds, then hot press is forced into 150kg/cm2, pressure is 15MPa, 10~20 seconds
After mold, then matched moulds 3~15 seconds removes the bubble of magnetic sheet both sides, and die sinking is cooled down, you can obtain last product after taking-up.
The step 1) in ball-milling medium be steel ball, carbon steel ball and zirconium ball in one or more；Ball-milling medium and magnetic
The mass ratio of powder is 1:1~7:Between 1.
During practical operation, the magnetic of 100 mass parts is added in ball grinder, and adds the zirconium ball of 200 mass parts, 75 matter
The ethanol of part and the dimethylbenzene of 75 mass parts are measured, ball milling 6h makes magnetic fully soak and be uniformly dispersed in a solvent, then added again
Enter binding agent polyvinyl butyral resin, the 5 parts of plasticizer polyester resin of 10 mass parts, ball milling 18h is filtered to remove undissolved viscous
Knot agent and plasticizer and the magnetic reunited, vacuum defoamation, which is removed, to be obtained after the bubble produced in mechanical milling process used in curtain coating
Slurry, and with the viscosity of digital viscometer slurry, the viscosity of slurry should be between 1000~3000mPas, if slurry is viscous
Spend low, slurry is easily settled, and phosphoric acid is too high, be difficult curtain coating.Slurry is poured into stainless steel coating device (scraper)
Chamber, is at the uniform velocity coated with the substrate for scribble mould release membrance.Wet film bottom is carried out to be heated to 50 DEG C, dried i.e. peelable after 1h.First
Hot press is opened and is heated to 100 DEG C, if then the magnetic sheet dry film obtained after dry plate curtain coating is put into vulcanizing press heating plate
Matched moulds, 150kg/cm2 (15MPa) is forced into after preheating 5 seconds by press again afterwards, is molded after 15 seconds, and then matched moulds removes magnetic sheet in 5 seconds
The bubble of both sides, die sinking is cooled down after taking-up, you can is obtained noise suppression piece and is carried out Mechanics Performance Testing and high temperature resistant experiment
(thickness of noise suppression piece is 0.3mm), test result is as shown in table 1 below：
The magnetic sheet mechanical property of 1 embodiment of table 1
| Tensile strength MPa | Rate % is stretched in fracture | Bending strength MPa | Bending modulus GPa |
| 5.2 | 35.4 | 4.6 | 0.8 |
Embodiment 2
Preparation technology and formula are same as Example 1, and the polyvinylbutyral binder of 8 mass parts and 7 mass parts are poly-
Ester resin plasticizer.
The magnetic sheet mechanical property of 2 embodiment of table 2
| Tensile strength MPa | Rate % is stretched in fracture | Bending strength MPa | Bending modulus GPa |
| 6.8 | 53.1 | 5.7 | 1.1 |
Embodiment 3
Preparation technology and formula are same as Example 1, and the polyvinylbutyral binder of 6 mass parts and 10 mass parts are poly-
Ester resin plasticizer.
The magnetic sheet mechanical property of 3 embodiment of table 3
| Tensile strength MPa | Rate % is stretched in fracture | Bending strength MPa | Bending modulus GPa |
| 7.9 | 59.8 | 6.4 | 1.4 |
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (8)
1. a kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece, it is characterised in that：Including by weight：
Plasticizer is the good resin and other high molecular polymers of pliability, including polyester resin, modified epoxy, hydrogenation stone
One or more in oleoresin and organic siliconresin.
2. high-flexibility high temperature resistant electromagnetic noise according to claim 1 suppresses piece, it is characterised in that：The magnetic includes
One or more in iron sial, iron silicochromium, iron nickel and iron tantnickel.
3. high-flexibility high temperature resistant electromagnetic noise according to claim 1 suppresses piece, it is characterised in that：The binding agent is
Highly viscous high molecular polymer, including polyvinyl butyral resin, polyvinyl alcohol contracting ethanol, ethyl cellulose, acetate butyrate are fine
One or more in dimension element and polyurethane.
4. high-flexibility high temperature resistant electromagnetic noise according to claim 1 suppresses piece, it is characterised in that：The organic solvent
For the one or more in benzene, ethanol, toluene, dimethylbenzene, ethyl acetate, cyclohexanone, bromochloromethane and propyl alcohol.
5. the high-flexibility high temperature resistant electromagnetic noise according to any one of Claims 1 to 4 suppresses the preparation method of piece, it is special
Levy and be, comprise the following steps：
1) magnetic of 100 mass parts is added in ball grinder, and adds the ball-milling medium of 200 mass parts, add organic solvent
100~200 parts, Ball-milling Time is 4~8 hours, magnetic is fully soaked and is uniformly dispersed in organic solvent；
2) 1~10 part of 5~20 parts of binding agent and plasticizer are added by weight, and Ball-milling Time is 14~22 hours；
3) undissolved binding agent and plasticizer and the magnetic reunited are filtered to remove, vacuum defoamation is removed in mechanical milling process
Slurry used in being cast after the bubble of generation；
4) with the viscosity of digital viscometer slurry, the viscosity of slurry should be between 1000~3000mPas, if phosphoric acid
Too low, slurry is easily settled, and phosphoric acid is too high, is difficult curtain coating；
5) slurry is poured into stainless steel coating device inner chamber, be at the uniform velocity coated with the substrate for scribble mould release membrance；
6) wet film bottom is carried out being heated to 40~60 DEG C, it is i.e. peelable after drying 1 hour；
7) hot press is opened and is heated to 100 DEG C, if then obtained magnetic sheet dry film is put into vulcanizing press and added after dry plate is cast
After matched moulds after on hot plate, preheating 3~8 seconds, then hot press is forced into 150kg/cm2, pressure is 15MPa, is opened after 10~20 seconds
The bubble of mould, then 3~15 seconds removal magnetic sheet both sides of matched moulds, die sinking is cooled down, you can obtain last product after taking-up.
6. high-flexibility high temperature resistant electromagnetic noise according to claim 5 suppresses the preparation method of piece, it is characterised in that：Institute
Stating the magnetic includes the one or more in iron sial, iron silicochromium, iron nickel and iron tantnickel；The binding agent is highly viscous height
Molecularly Imprinted Polymer, including polyvinyl butyral resin, polyvinyl alcohol contracting ethanol, ethyl cellulose, cellulose acetate-butyrate and poly- ammonia
One or more in ester；The organic solvent be benzene, ethanol, toluene, dimethylbenzene, ethyl acetate, cyclohexanone, bromochloromethane and
One or more in propyl alcohol.
7. high-flexibility high temperature resistant electromagnetic noise according to claim 5 suppresses the preparation method of piece, it is characterised in that：Institute
State step 1) in ball-milling medium be steel ball, carbon steel ball and zirconium ball in one or more.
8. high-flexibility high temperature resistant electromagnetic noise according to claim 7 suppresses the preparation method of piece, it is characterised in that：Institute
State step 1) in ball-milling medium and magnetic mass ratio 1:1~7:Between 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710439838.4A CN107123499A (en) | 2017-06-12 | 2017-06-12 | A kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439838.4A CN107123499A (en) | 2017-06-12 | 2017-06-12 | A kind of high-flexibility high temperature resistant electromagnetic noise suppresses piece and preparation method thereof |
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| Publication Number | Publication Date |
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| CN107123499A true CN107123499A (en) | 2017-09-01 |
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ID=59729858
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108053008A (en) * | 2017-11-29 | 2018-05-18 | 横店集团东磁股份有限公司 | A kind of high frequency RFID electronic label antifreeze plate and preparation method thereof |
| CN108749015A (en) * | 2018-05-11 | 2018-11-06 | 横店集团东磁股份有限公司 | A kind of high magnetic permeability inhales the preparation method of thickness of convolution piece |
| CN109433084A (en) * | 2018-11-26 | 2019-03-08 | 横店集团东磁股份有限公司 | Inhibit the method that aggregate is generated in slurry and slurry therefrom and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63194312A (en) * | 1987-02-06 | 1988-08-11 | Matsushita Electric Ind Co Ltd | Manufacture of resin magnet |
| CN105537581A (en) * | 2016-01-11 | 2016-05-04 | 横店集团东磁股份有限公司 | Noise suppression piece and preparation method thereof |
-
2017
- 2017-06-12 CN CN201710439838.4A patent/CN107123499A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63194312A (en) * | 1987-02-06 | 1988-08-11 | Matsushita Electric Ind Co Ltd | Manufacture of resin magnet |
| CN105537581A (en) * | 2016-01-11 | 2016-05-04 | 横店集团东磁股份有限公司 | Noise suppression piece and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108053008A (en) * | 2017-11-29 | 2018-05-18 | 横店集团东磁股份有限公司 | A kind of high frequency RFID electronic label antifreeze plate and preparation method thereof |
| CN108053008B (en) * | 2017-11-29 | 2020-03-24 | 横店集团东磁股份有限公司 | Magnetic shielding sheet for high-frequency RFID electronic tag and preparation method thereof |
| CN108749015A (en) * | 2018-05-11 | 2018-11-06 | 横店集团东磁股份有限公司 | A kind of high magnetic permeability inhales the preparation method of thickness of convolution piece |
| CN108749015B (en) * | 2018-05-11 | 2020-06-19 | 横店集团东磁股份有限公司 | Preparation method of high-permeability wave-absorbing thick sheet |
| CN109433084A (en) * | 2018-11-26 | 2019-03-08 | 横店集团东磁股份有限公司 | Inhibit the method that aggregate is generated in slurry and slurry therefrom and application |
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