CN108575079A - Electromagnetic shielding composite laminate magnetic material structures and preparation method thereof - Google Patents
Electromagnetic shielding composite laminate magnetic material structures and preparation method thereof Download PDFInfo
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- CN108575079A CN108575079A CN201710135753.7A CN201710135753A CN108575079A CN 108575079 A CN108575079 A CN 108575079A CN 201710135753 A CN201710135753 A CN 201710135753A CN 108575079 A CN108575079 A CN 108575079A
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- magnetically soft
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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
- H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1808—Handling of layers or the laminate characterised by the laying up of the 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0036—Heat treatment
- B32B2038/0048—Annealing, relaxing
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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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/105—Metal
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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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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention provides a kind of electromagnetic shielding composite laminate magnetic material structures and preparation method thereof, and the electromagnetic shielding composite laminate magnetic material structures include：Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band bed of material；Ferrite magnetic material layer or magnetic powder class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.The electromagnetic shielding of the present invention performance advantage of the composite laminate magnetic material structures two kinds of materials that are that include the magnetically soft alloy steel band bed of material with the composite lamainated structure of ferrite magnetic material layer or magnetic powder class glue material layer can integrate, with good magnetism isolating effect, fever energy consumption problem is reduced, the applying frequency of magnetic material is widened significantly（100kHz~20MHz）, the wireless chargings electromagnetic shielding demand such as Qi and A4WP can be met simultaneously, had great importance to improving its charge efficiency and charging distance.
Description
Technical field
The invention belongs to magnetic materials in the wireless power transmission of power electronics magnetic cell and electromagnetic shielding application field, spy
It is not to be related to a kind of electromagnetic shielding composite laminate magnetic material structures and preparation method thereof.
Background technology
In recent years, popularizing with smart mobile phone, digital camera, tablet computer and other small portable mobile devices,
People’s lives custom has had changed a lot, and portable electronic device has become essential in people's Working Life
One of tool.As people’s lives custom is more and more abundant, the type requirements of electronic equipment are also more and more various, function
(such as wireless charging) is increasingly stronger, and for power consumption also with growth, portable electronic device then needs progress frequent charge
Maintain normal use.Since the processes such as the wired charging of conventional electronic devices and data exchange are required to a set of respective charger
Carried out with data line, result in current electronic equipment charging interface and charger and data line it is extremely complicated and more, and
And often plug is easy to cause data line and the interface damage of electronic equipment, is brought greatly to the trip of the Working Life of people
Puzzlement.If electronic equipment uses wireless charging technology, a large amount of charger and data line can be saved, solves charger
The problem of huge waste of the resources such as data line, while can also solve the problems, such as that the interface of current electronic equipment is unmatched, significantly
Facilitate the Working Life custom of people.
Wireless charging technology is that electric energy is transmitted to electricity consumption from power supply transmitting end-coil (100kHz or more) to receive end line
Circle, and the technology to charge for the battery of equipment.It is, in principle, that there are mainly three types of wireless charging technologies, induction,
Magnetic resonance type, radio waves type etc..Due to the popularization of technology and market, it is big that wireless charging professional standard has also correspondingly formed three
Alliance organization WPC, A4WP and PMA (A4WP and PMA have merged into Airfuel) respectively have more than ten companies to be added thereto.WPC
Induction wireless charging is laid particular emphasis on, power frequency is 100~200kHz, and charge efficiency is higher, but charging distance is only 5mm
Within, represent enterprise have Samsung, Huawei, in emerging, Nokia, Motorola, HTC, OPPO, LG, Google, Philip etc..And
Airfuel pays attention to magnetic resonance type wireless charging, and power frequency 6.78MHz, charge efficiency is moderate, and charging room is away from can reach
Several meters of distance, representing enterprise has Fujitsu, Sony, high pass, WiTricity etc..Presently the most ripe technology is electromagnetism sense
The wireless charging technology for answering mode has the potentiality that high-volume promotes production.Since in March, 2015, Samsung mobile phone is from its flagship
Model Galaxy S6 start just to be laid out wireless charging function, and later mobile phone model supports wireless charging function, many
Other brand mobile phones also begin to fall over each other that it is imitated to use wireless charging function.
Wireless charging technology for improve its charge efficiency and apart from when, usually can pass through improve power supply transmitting end-coil
Power frequency solve, but before this, first also need to solve electromagnetic wave to generate heat to the metal parts of battery of mobile phone and surrounding
Influence problem one higher magnetic conductivity material is placed between the coil back side and battery typically when to mobile phone wireless charging
The antifreeze plate of material provides magnetic conduction channel come the electromagnetic wave sent out for power supply transmitting end-coil, reduces electromagnetic wave to battery and its surrounding
Mobile phone other component vortes interference, usual this eddy current effect can convert electrical energy into thermal energy to losing, to reduce
The induced current of receiving coil.When power frequency is higher, vortex is bigger, and the energy lost is also bigger, wireless charging
Efficiency is lower.In addition, when the electric current of wireless charging is larger, it is also possible to the antifreeze plate at the coil back side can be caused saturation occur existing
As once antifreeze plate occurs, saturation is abnormal, then the electromagnetic wave that Wireless charging coil is sent out can enter mobile phone across antifreeze plate
In battery and surrounding metal, and serious heating functioin is generated, eventually leads to wireless charging efficiency decline.
Magnetically soft alloy strip material is since it is with high saturated magnetic induction (0.8~2.0T), high magnetic permeability, low-loss
Be widely used in power electronics magnetic cell field etc. excellent soft magnet performance, thus its can also be used as wireless charging antifreeze plate into
It exercises and uses.But it is limited since its material is applicable in frequency, only to go out its excellent for the competence exertion within 500kHz for applying frequency
Performance (μ " is 40~60), when frequency reaches 3MHz or more, the magnetic conductivity of magnetically soft alloy strip material declines by a big margin, and magnetic
Damage increases apparent (μ ">140) electronic equipment, has been cannot be satisfied to use (such as Fig. 1, wherein solid line are magnetic conductivity, and dotted line is magnetic loss).
And ferrite, magnetic powder class glue material, since its resistivity is big, mutually insulated between magnetic powder particle, kelvin effect is smaller, high frequency (<
Higher magnetic conductivity (μ ' can also be maintained when 20MHz)>, and the relatively low (μ " of its magnetic loss 100)<50), (such as Fig. 2 and Fig. 3,
In, solid line is magnetic conductivity, and dotted line is magnetic loss) but its low frequency (<Magnetic conductivity when 500kHz) can not show a candle to magnetically soft alloy strip material,
Its saturation induction density (0.2~0.45T) also less than magnetically soft alloy strip material one third, if it is wireless in high current
When charging, Ferrite Material easily will appear saturation exception, to lose the function every magnetic, or even burn battery and electronic equipment
Deng the other magnetic conductivity temperature characterisitic of ferrite magnetic material fluctuation compared with the magnetic conductivity temperature characterisitic of magnetically soft alloy strip material
Larger, when temperature is higher than 40 DEG C, magnetic conductivity declines obviously, and especially when higher than 100 DEG C, magnetic conductivity drastically declines.And
When low temperature is less than -20 DEG C, magnetic conductivity also drastically declines.Therefore, the variation of magnetic conductivity temperature stability too greatly, is unfavorable for wireless charging
Electricity electromagnetic shielding is used.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of electromagnetic shielding composite laminates
Magnetic material structures and preparation method thereof, for solving in the prior art only with magnetically soft alloy strip material as wireless charging
Piece is existing, and when frequency reaches 3MHz or more, the magnetic conductivity of magnetically soft alloy strip material declines by a big margin, and magnetic loss increase is bright
It is aobvious, the problem of electronic equipment uses is cannot be satisfied, and exist as wireless charging piece only with ferrite, magnetic powder class glue material
Low frequency when magnetic conductivity can not show a candle to magnetically soft alloy strip material, saturation induction density is also less than magnetically soft alloy strip material
One third, if it in high current wireless charging, it is abnormal that Ferrite Material easily will appear saturation, to lose every magnetic
Function, or even burn battery and electronic equipment etc., and too greatly due to the variation of its magnetic conductivity temperature stability, it is unfavorable for wireless charging
The problem of electricity electromagnetic shielding is used.
In order to achieve the above objects and other related objects, the present invention provides a kind of electromagnetic shielding composite laminate magnetic material
Structure, the electromagnetic shielding composite laminate magnetic material structures include：
Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band bed of material；
Ferrite magnetic material layer or magnetic powder class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.
A kind of preferred embodiment of electromagnetic shielding composite laminate magnetic material structures as the present invention, the electromagnetic shielding
Further include with composite laminate magnetic material structures：
Protective film adheres on the magnetically soft alloy strip material structure far from the ferrite magnetic material layer or the magnetic
The surface of powder class glue material layer；
First PET release films adhere on surface of the protective film far from the magnetically soft alloy strip material structure；
2nd PET release films adhere on the ferrite magnetic material layer or the magnetic powder class glue material layer far from described soft
The surface of magnetic alloy strip material structure.
A kind of preferred embodiment of electromagnetic shielding composite laminate magnetic material structures as the present invention, the magnetically soft alloy
Strip material structure includes opposite first surface and second surface, the first surface of the magnetically soft alloy strip material structure and
Second surface is equipped with the first adhesive layer；The ferrite magnetic material layer or the magnetic powder class glue material layer are viscous via described first
Close the first surface that layer adheres on the magnetically soft alloy strip material structure；The protective film is posted via first adhesive layer
In the second surface of the magnetically soft alloy strip material structure；The 2nd PET release films adhere on institute via the second adhesive layer
State the surface of ferrite magnetic material layer or the magnetic powder class glue material layer far from the magnetically soft alloy strip material structure.
A kind of preferred embodiment of electromagnetic shielding composite laminate magnetic material structures as the present invention, the magnetically soft alloy
Strip material structure is to include the magnetically soft alloy steel band bed of material described in multilayer and replace with the magnetically soft alloy steel band bed of material folded
The laminated construction for the third adhesive layer set.
A kind of preferred embodiment of electromagnetic shielding composite laminate magnetic material structures as the present invention, the magnetically soft alloy
Strip material structure is banded structure, and the ferrite magnetic material layer or magnetic powder class glue material layer are banded structure.
A kind of preferred embodiment of electromagnetic shielding composite laminate magnetic material structures as the present invention, the electromagnetic shielding
Further include erosion resistant coating with composite laminate magnetic material structures, the exposed magnetically soft alloy steel is at least completely covered in the erosion resistant coating
The side and end face of the band bed of material, and the exposed ferrite magnetic material layer or the magnetic powder class glue material is at least completely covered
The side and end face of layer.
The present invention also provides a kind of electromagnetic shielding preparation method of composite laminate magnetic material structures, the preparation methods
Include the following steps：
1) magnetically soft alloy strip material structure is prepared, the magnetically soft alloy strip material structure includes that at least one layer of soft magnetism closes
The golden steel band bed of material；
2) ferrite magnetic material layer or magnetic powder class glue material layer are prepared；
3) the magnetically soft alloy strip material structure is adhered on into the ferrite magnetic material layer or magnetic powder class glue material layer
Surface.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 1) in, prepare magnetically soft alloy strip material structure and include the following steps：
The magnetically soft alloy steel band bed of material 1-1) is provided；
1-2) the magnetically soft alloy steel band bed of material is made annealing treatment.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 1) in, prepare magnetically soft alloy strip material structure and include the following steps：
The multilayer magnetically soft alloy steel band bed of material 1-1) is provided；
Laminated layer 1-2) is provided；
The magnetically soft alloy steel band bed of material is replaced with the adhesive layer 1-3) and is fit together, includes multilayer to be formed
The lamination knot of the magnetically soft alloy steel band bed of material and the adhesive layer being alternately superimposed on the magnetically soft alloy steel band bed of material
Structure.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
Rapid 1-1) and step 1-2) between further include the steps that making annealing treatment the magnetically soft alloy steel band bed of material.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, will
The magnetically soft alloy steel band bed of material carries out annealing and includes the following steps：
The magnetically soft alloy steel band bed of material is wound into toroidal core；
By the toroidal core as in heat-treatment furnace；
The heat-treatment furnace is vacuumized in advance using vacuum-pumping valve and vacuum pump, and is kept in the heat treatment
Vacuum pressure maintain -0,05MPa~-0.1MPa, the time persistently vacuumized be 10min~120min；
The vacuum valve and the vacuum pump are closed, tracheae charging valve is opened, guarantor is filled with into the heat-treatment furnace
Protect gas, it is ensured that inert atmosphere pressure closes the tracheae charging valve after being 0~0.1Mpa in the heat-treatment furnace；
The heat treatment in-furnace temperature is warming up to 200 DEG C~800 DEG C, room temperature is down to after keeping the temperature 0.5h~4h.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 1) after, further include the steps that by the magnetically soft alloy strip material structure carry out fragmentation processing.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 2) in, prepare magnetic powder class glue material layer and include the following steps：
Soft magnetism powder 2-1) is provided；
Glue material 2-2) is provided；
It stirs evenly, is coated on PET polyester films after 2-3) mixing the soft magnetism powder in proportion with the glue material
Carry out drawout；
2-4) by step 2-3) obtained structure carries out hot pressing and is thinned to can be obtained the magnetic powder class glue material layer.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 3) after further include following steps：
4) protective film is provided, the protective film is adhered on into the magnetically soft alloy strip material structure far from the ferrite
The surface of magnetic material layer or magnetic powder class glue material layer；
5) in the protective film, the surface far from the magnetically soft alloy strip material structure forms PET release films, and in institute
It states the surface of ferrite magnetic material layer or magnetic powder class glue material layer far from the magnetically soft alloy strip material structure and forms the PET
Release film.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 5) to further include later：
6) the step of structure that step 5) obtains being die cut, to obtain the finished product of required specification.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, will
The structure that step 5) obtains further includes after being die cut
7) the step of finished product of obtained required specification being subjected to preservative treatment.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, step
It is rapid 7) in, use and impregnate the method for inorganic coating agent, the method for impregnating resin shellac varnish, impregnate inorganic coating agent and resin shellac varnish
The laminating PET film of method or surface and carry out pack edge reason method will obtained required specification finished product carry out anti-corrosion at
Reason.
As described above, electromagnetic shielding composite laminate magnetic material structures and preparation method thereof of the present invention, have following
Advantageous effect：The electromagnetic shielding of the present invention with composite laminate magnetic material structures be include the magnetically soft alloy steel band bed of material with
The composite lamainated structure of ferrite magnetic material layer or magnetic powder class glue material layer, in electromagnetic shielding composite laminate magnetic material
Structure be used as wireless charging antifreeze plate when, both ensured magnetically soft alloy strip material in lower frequency (<High magnetic 500kHz)
The soft magnet performances such as conductance, but taken into account ferrite, magnetic powder class glue material upper frequency (<Low loss characteristic when 20MHz), simultaneously
It is also contemplated that the antifreeze plate at the coil back side prevented in high current wireless charging it is supersaturated abnormal, using this composite laminate knot
Structure can integrate the performance advantage of two kinds of materials, have good magnetism isolating effect, reduce fever energy consumption problem, the application frequency of magnetic material
Rate widens (100kHz~20MHz) significantly, can meet the wireless chargings electromagnetic shielding demand such as Qi and A4WP simultaneously, to improving it
Charge efficiency and charging distance have great importance.
Description of the drawings
Fig. 1 is shown as the magnetic spectrum curve graph of magnetically soft alloy strip material in the prior art.
Fig. 2 is shown as the magnetic spectrum curve graph of ferrite magnetic material in the prior art.
Fig. 3 is shown as the magnetic spectrum curve graph of magnetic powder class glue material in the prior art.
Fig. 4 to fig. 6 is shown as the electromagnetic shielding provided in the embodiment of the present invention one composite laminate magnetic material structures
Cross section structure schematic diagram, wherein the ferrite magnetic of the electromagnetic shielding in composite laminate magnetic material structures in Fig. 5
Property material layer or magnetic powder class glue material layer be ferrite magnetic material layer, the electromagnetic shielding composite laminate magnetism material in Fig. 6
Expect that the ferrite magnetic material layer or magnetic powder class glue material layer in structure are magnetic powder class glue material layer.
Fig. 7 is shown as soft magnetism of the electromagnetic shielding provided in the embodiment of the present invention one in composite laminate magnetic material structures
The cross section structure schematic diagram of alloyed steel strip material structure.
Fig. 8 is shown as the magnetic spectrum curve graph of the composite laminate magnetic material structures of the electromagnetic shielding in Fig. 5.
Fig. 9 is shown as the magnetic spectrum curve graph of the composite laminate magnetic material structures of the electromagnetic shielding in Fig. 6.
Figure 10 is shown as preparation of the electromagnetic shielding provided in the embodiment of the present invention four with composite laminate magnetic material structures
The flow chart of method.
Component label instructions
1 magnetically soft alloy strip material structure
The 11 magnetically soft alloy steel band bed of materials
12 third adhesive layers
2 ferrite magnetic materials or magnetic powder class glue material layer
21 ferrite magnetic material layers
22 magnetic powder class glue material layers
3 protective films
4 the oneth PET release films
5 the 2nd PET release films
6 first adhesive layers
7 second adhesive layers
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Fig. 4 is please referred to Figure 10.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, though package count when only display is with related component in the present invention rather than according to actual implementation in diagram
Mesh, shape and size are drawn, when actual implementation form, quantity and the ratio of each component can be a kind of random change, and its
Assembly layout form may also be increasingly complex.
Embodiment one
Fig. 4 and Fig. 6 is please referred to, the present invention provides a kind of electromagnetic shielding composite laminate magnetic material structures, the electromagnetism
Shielding composite laminate magnetic material structures include：Magnetically soft alloy strip material structure 1, the magnetically soft alloy strip material structure
1 includes at least one layer of magnetically soft alloy steel band bed of material 11；Ferrite magnetic material layer or magnetic powder class glue material layer 2, the ferrite
Magnetic material layer or magnetic powder class glue material layer 2 adhere on the surface of the magnetically soft alloy strip material structure 1.
As an example, the material of the magnetically soft alloy steel band bed of material 11 can be electrical pure iron, it is grain-oriented Si steel sheet, super
Silicon steel sheet, permalloy or amorphous nano peritectic alloy (1k101,1k102,1k103,1k104,1k105,1k106,1k107,
1k201,1k502 etc.), saturation flux density Bs=0.8T~2.0T of the magnetically soft alloy steel band bed of material 11.
As an example, the magnetically soft alloy steel band bed of material 11 is the magnetically soft alloy steel band bed of material by annealing.
As an example, the ferrite magnetic material layer in the ferrite magnetic material layer or magnetic powder class glue material layer 2
21 material is Mn-Zn, Ni-Zn or Cu-Mg-Zn etc., the saturation flux density Bs=of the ferrite magnetic material layer 21
0.2T~0.4T；The magnetic powder class glue material layer 22 in the ferrite magnetic material layer or magnetic powder class glue material layer 2 is by soft magnetism
Powder stirs evenly by a certain percentage with glue material, and coats stream edge and carry out drawout on PET mylars, then send to hot press
Structure obtained from upper progress hot pressing is thinned；Wherein, the soft magnetism powder can be Fe-Si alloyed powders, Fe-Si-Al alloyed powders,
Fe-Ni alloy/C powder, Fe-Ni-Mo alloyed powders, Fe-Si-B alloyed powders or Fe-Si-B-Cu-Nb alloyed powders etc., the soft magnetism powder
Saturation flux density Bs=0.8T~1.5T, the grain graininess of the soft magnetism powder is 100~800 mesh；The glue material can be with
For epoxy resin, acrylic resin, butyl rubber or isopropyl rubber etc..The electromagnetic shielding of present invention composite laminate magnetism
Material structure be include the magnetically soft alloy steel band bed of material 11 and the ferrite magnetic material layer or magnetic powder class glue material layer 2
Composite lamainated structure both ensured when the electromagnetic shielding is used as wireless charging antifreeze plate with composite laminate magnetic material structures
Magnetically soft alloy strip material in lower frequency (<The soft magnet performances such as high magnetic permeability 500kHz), and taken into account ferrite, magnetic
Powder class glue material upper frequency (<Low loss characteristic when 20MHz) can make up the electromagnetism of the single magnetic material in a certain frequency range
The deficiency of performance, while it is also contemplated that the antifreeze plate at the coil back side prevents in high current wireless charging supersaturated abnormal, adopting
The performance advantage of two kinds of materials can be integrated with this composite lamainated structure, there is good magnetism isolating effect, reduced fever energy consumption and asked
Topic, and the instability mode of ferrite magnetic performance at high temperature can be reduced and the elegant possibility of magnetic property occurs, answering for magnetic material
It is widened significantly with frequency (100kHz~20MHz), the wireless chargings electromagnetic shielding demand such as Qi and A4WP can be met simultaneously.
As an example, the electromagnetic shielding composite laminate magnetic material structures further include：Protective film 3, the protective film 3
Adhere on surface of the magnetically soft alloy strip material structure 1 far from the ferrite magnetic material layer or magnetic powder class glue material layer 2；
First PET release films 4, the first PET release films 4 adhere on the protective film 3 far from the magnetically soft alloy strip material knot
The surface of structure 1；2nd PET release films 5, the 2nd PET release films 5 adhere on the ferrite magnetic material layer or magnetic powder class
Surface of the glue material layer 2 far from the magnetically soft alloy strip material structure 1.
As an example, the protective film 3 is black protective film, material can be graphite heat-conducting fin.The electromagnetic shielding
With composite laminate magnetic material structures by the way that the protective film 3 is arranged, be conducive to the electromagnetic shielding composite laminate magnetism material
Heat disperses outward caused by lamination magnetic material internal in material structure, it is ensured that the electromagnetic shielding composite laminate magnetism material
Expect that inside configuration fever is smaller.
As an example, the magnetically soft alloy strip material structure 1 includes opposite first surface and second surface, it is described soft
The first surface and second surface of magnetic alloy strip material structure 1 are equipped with the first adhesive layer 6；The ferrite magnetic material layer
Or the magnetic powder class glue material layer 2 adheres on the first table of the magnetically soft alloy strip material structure 1 via first adhesive layer 6
Face；The protective film 3 adheres on the second surface of the magnetically soft alloy strip material structure 1 via first adhesive layer 6；Institute
State that the 2nd PET release films 5 adhere on the ferrite magnetic material layer via the second adhesive layer 7 or magnetic powder class glue material layer 2 is separate
The surface of the magnetically soft alloy strip material structure 1.
In one example, as shown in figure 5, the ferrite magnetic material layer or magnetic powder class glue material layer 2 are the ferrite
Magnetic material layer 21, Fig. 8 are the magnetic spectrum curve graph of the electromagnetic shielding composite laminate magnetic material structures in Fig. 5；Show another
In example, as shown in fig. 6, the ferrite magnetic material layer or magnetic powder class glue material layer 2 are the magnetic powder class glue material layer 2, Fig. 9 is figure
The magnetic spectrum curve graph of electromagnetic shielding composite laminate magnetic material structures in 6.
As an example, as shown in fig. 7, the magnetically soft alloy strip material structure 1 is to include magnetically soft alloy steel described in multilayer
The laminated construction of the band bed of material 11 and the third adhesive layer 12 being alternately superimposed on the magnetically soft alloy steel band bed of material 11.
As an example, first adhesive layer 6, second adhesive layer 7 and the third adhesive layer 12 all can be but
It is not limited only to double faced adhesive tape.
In one example, the electromagnetic shielding is banded structure with composite laminate magnetic material structures, i.e., the described soft magnetism closes
Golden strip material structure 1 is banded structure, and the ferrite magnetic material layer or magnetic powder class glue material layer 2 are banded structure.
In another example, the electromagnetic shielding composite laminate magnetic material structures are with specified specification
Granular texture, i.e., the described magnetically soft alloy strip material structure 1 are the nutty structure with specified specification, the ferrite
Magnetic material layer or magnetic powder class glue material layer 2 are the nutty structure with specified specification.
Pass through between each magnetic material layer in the electromagnetic shielding composite laminate magnetic material structures of the present invention
Two-sided gluing knot and keep apart, i.e. the magnetically soft alloy strip material structure 1 and the ferrite magnetic material layer or magnetic powder class
Kept apart by two-sided gluing knot between glue material layer 2, and each layer soft magnetism in the magnetically soft alloy strip material structure 1
Keep apart also by two-sided gluing knot between alloyed steel strip material layer 11, and due to the magnetically soft alloy steel band bed of material 11
To carry out being fragmented into a series of banded structure or particulate structure by special design of scattered small flowers and plants technique, this advantageously reduces described
Eddy-current loss in electromagnetic shielding composite laminate magnetic material structures, improves its high frequency characteristics.
As an example, the electromagnetic shielding composite laminate magnetic material structures further include erosion resistant coating (not shown), it is described
The side and end face of the exposed magnetically soft alloy steel band bed of material 1 is at least completely covered in erosion resistant coating, and is at least completely covered naked
The ferrite magnetic material layer of dew or the side and end face of magnetic powder class glue material layer 2.
The erosion resistant coating can be that inorganic coating agent protection film layer, resin glue enamelled coating, PET release films or inorganic coating agent are protected
Cuticular layer and resin glue enamelled coating；Wherein, the inorganic coating agent protection film layer can be but be not limited only to phosphate or chromate
Protection film layer, the resin glue enamelled coating can be but be not limited only to epoxy resin, polyester resin, acrylic resin, alkyd resin
Or varnish etc..It, can be to avoid by the way that the erosion resistant coating is arranged in the electromagnetic shielding composite laminate magnetic material structures
The magnetically soft alloy steel band bed of material 1 and the ferrite magnetic material layer or magnetic powder class glue material layer 2 are in related extreme environment
The stability of its electromagnetic performance is influenced because corrosion occurs.
Embodiment two
Incorporated by reference to Fig. 4 to Fig. 7 refering to fig. 10, the present invention also provides a kind of electromagnetic shielding composite laminate magnetic material structures
Preparation method, the preparation method be suitable for prepare embodiment one described in electromagnetic shielding composite laminate magnetic material knot
The preparation method of structure, the electromagnetic shielding composite laminate magnetic material structures includes the following steps：
1) magnetically soft alloy strip material structure is prepared, the magnetically soft alloy strip material structure includes that at least one layer of soft magnetism closes
The golden steel band bed of material；
2) ferrite magnetic material layer or magnetic powder class glue material layer are prepared；
3) the magnetically soft alloy strip material structure is adhered on into the ferrite magnetic material layer or magnetic powder class glue material layer
Surface.
In step 1), the S1 steps in 0 are please referred to Fig.1, prepare magnetically soft alloy strip material structure 1, the soft magnetism closes
Golden strip material structure 1 includes at least one layer of magnetically soft alloy steel band bed of material 11.
In one example, magnetically soft alloy strip material structure 1 is prepared to include the following steps：
The magnetically soft alloy steel band bed of material 11 1-1) is provided；
1-2) the magnetically soft alloy steel band bed of material 11 is made annealing treatment.
As an example, step 1-1) in, the material of the magnetically soft alloy steel band bed of material 11 can be electrical pure iron, be orientated
Silicon steel sheet, super silicon steel sheet, permalloy or amorphous nano peritectic alloy (1k101,1k102,1k103,1k104,1k105,
1k106,1k107,1k201,1k502 etc.), the saturation flux density Bs=0.8T of the magnetically soft alloy steel band bed of material 11~
2.0T；The width of the magnetically soft alloy steel band bed of material 11 can be 50mm~200mm, and thickness can be 16 μm~350 μm.
As an example, step 1-2) in, specific method that the magnetically soft alloy steel band bed of material 11 is made annealing treatment
For：
1-2-1) by the magnetically soft alloy steel band bed of material 11 winding in the toroidal core with certain internal diameter specification；
1-2-2) toroidal core of winding is positioned on rack pallet, is spaced between the adjacent toroidal core
Then the rack pallet with the toroidal core is sent to heat-treatment furnace, and closes sealing fire door by certain spacing；
1-2-3) heat-treatment furnace is vacuumized in advance, and keep the vacuum pressure value in stove maintain-
0.05MPa~-0.1MPa, the time persistently vacuumized are 10min~120min；It is then shut off vacuum-pumping valve and vacuum pump；
Tracheae charging valve is opened, protective gas (for example N is filled with into the heat-treatment furnace2、H2Or Ar etc.), it is ensured that indifferent gas in stove
Atmosphere pressure is 0MPa~0.1MPa, is then shut off charging valve；
1-2-4) startup power supply heating carries out being warming up to (for example, 200 DEG C of certain temperature according to required annealing process curve
~800 DEG C), heat preservation a period of time (for example, 0.5h~4h) is then carried out, room temperature is finally cooled to and comes out of the stove and complete annealing process.
In annealing process, the magnetically soft alloy steel band bed of material 11 is due to the diffusion of interior atoms, knot of tissue
Relaxation occurs for structure, and internal residual internal stress will be eliminated and small (nanoscale) grain structure is precipitated, to improve its soft property
Energy.
In another example, magnetically soft alloy strip material structure is prepared to include the following steps：
The multilayer magnetically soft alloy steel band bed of material 11 1-1) is provided；
Laminated layer 1-2) is provided；
The magnetically soft alloy steel band bed of material 11 is replaced with the adhesive layer 1-3) and is fit together, includes more to be formed
The layer magnetically soft alloy steel band bed of material 11 and the adhesive layer that is alternately superimposed on the magnetically soft alloy steel band bed of material 11
Laminated construction.
It should be noted that the adhesive layer herein is the third adhesive layer 12 described in embodiment one.
As an example, step 1-1) and step 1-2) between further include moving back the magnetically soft alloy steel band bed of material 11
The step of fire processing；The method that the non-retentive alloy steel band bed of material 11 is made annealing treatment and moving back in an above-mentioned example
Fiery processing method is identical, is not repeated herein.
Further include the step that the magnetically soft alloy strip material structure 1 is carried out to fragmentation processing as an example, after step 1)
Suddenly.Specifically, first, by one layer of magnetically soft alloy steel band bed of material 11 with one layer of double faced adhesive tape is laminating bonds together；Then
The magnetically soft alloy steel band bed of material 11 being pasted onto on double faced adhesive tape is passed through into dedicated fragmentation machine (mechanical disintegration, ultrasonic wave
Fragmentation etc.) processing, by the 11 uniform fragmentation of the magnetically soft alloy steel band bed of material, by fine particle, (grain size is in a series of uniformly
0.1mm~5mm) composition magnetically soft alloy steel band item；Finally, the good magnetically soft alloy steel bands item of fragmentation passes through two-sided glue sticking
Together, laminated construction as shown in Figure 7 is formed；Wherein, described in the laminated construction of the magnetically soft alloy strip material structure 1
The number of plies of the magnetically soft alloy steel band bed of material 11 is more than 1 and is less than 100.
In step 2), the S2 steps in 0 are please referred to Fig.1, prepare ferrite magnetic material layer or magnetic powder class glue material layer 2.
As an example, the material of the ferrite magnetic material layer 21 is Mn-Zn, Ni-Zn or Cu-Mg-Zn etc., the iron
Saturation flux density Bs=0.2T~0.4T of oxysome magnetic material layer 21, the width of the ferrite magnetic material layer 21 can be with
For 50mm~200mm, thickness can be 50 μm~300 μm.
Include the following steps as an example, preparing magnetic powder class glue material layer 22：
Soft magnetism powder 2-1) is provided；The soft magnetism powder can be Fe-Si alloyed powders, Fe-Si-Al alloyed powders, Fe-Ni conjunctions
Bronze, Fe-Ni-Mo alloyed powders, Fe-Si-B alloyed powders or Fe-Si-B-Cu-Nb alloyed powders etc., the saturation magnetic of the soft magnetism powder
The grain graininess of flux density Bs=0.8T~1.5T, the soft magnetism powder are 100~800 mesh；
Glue material 2-2) is provided；The glue material can be epoxy resin, acrylic resin, butyl rubber or isopropyl rubber etc.；
It stirs evenly, is coated on PET polyester films after 2-3) mixing the soft magnetism powder in proportion with the glue material
Carry out drawout；
2-4) by step 2-3) obtained structure send to carrying out hot pressing on hot press and be thinned to can be obtained the magnetic powder class glue
Material layer.
As an example, the width of the magnetic powder class glue material layer 22 is 50mm~200mm, thickness is 50 μm~200 μm.
In step 3), the S3 steps in 0 are please referred to Fig.1, the magnetically soft alloy strip material structure 1 are adhered on described
The surface of ferrite magnetic material layer or magnetic powder class glue material layer 2.
As an example, the ferrite magnetic material layer or magnetic powder class glue material layer 2 adhered on by the adhesive layer it is described
The surface of magnetically soft alloy strip material structure 1, the adhesive layer can be but be not limited only to double faced adhesive tape.
As an example, further including following steps after step 3)：
4) protective film 3 is provided, (adhesive layer described herein is described in embodiment one by adhesive layer by the protective film 3
The first adhesive layer 6) adhere on the magnetically soft alloy strip material structure 1 far from the ferrite magnetic material layer or magnetic powder class
The surface of glue material layer 2；The protective film 3 is black protective film, and material can be graphite heat-conducting fin.
5) in the protective film 3, the surface far from the magnetically soft alloy strip material structure 1 forms PET release films (i.e. in fact
Apply the first PET release films 4 described in example one), and in the ferrite magnetic material layer or magnetic powder class glue material layer 2 far from described
The surface of magnetically soft alloy strip material structure 1 forms the PET release films (the 2nd PET release films i.e. described in embodiment one
5)；Specifically, the PET release films adhere on the iron by adhesive layer (the second adhesive layer 7 i.e. described in embodiment one)
The surface of oxysome magnetic material layer or magnetic powder class glue material layer 2 far from the magnetically soft alloy strip material structure 1.
As an example, further including after step 5)：
6) the step of structure that step 5) obtains being die cut, to obtain the finished product of required specification.
A kind of preferred embodiment of the preparation method of electromagnetic shielding composite laminate magnetic material structures as the present invention, will
The structure that step 5) obtains further includes after being die cut
7) the step of finished product of obtained required specification being subjected to preservative treatment.
As an example, in step 7), the method, the method for impregnating resin shellac varnish, immersion nothing for impregnating inorganic coating agent are used
The required specification ruler that the laminating PET film of method or surface of machine covering and resin shellac varnish and the method for carrying out pack edge reason will obtain
Very little finished product carries out preservative treatment.
As an example, the finished product of obtained required specification is carried out at anti-corrosion using the method for impregnating inorganic coating agent
The specific method of reason is：The finished product edge of obtained required size is impregnated into inorganic coating agent (phosphate or chromate) solution
In, chemical reaction is brought it about, then it is toasted to 0.5~5h at 80~200 DEG C, it can be on finished product peripheral fault surface
Place generates one layer of protection film layer for being insoluble in water.The protective film is firmly combined with matrix, has good adsorptivity, corrosion resistance.
There can be preferable anti salt spray corrosion effect to magnetic material peripheral fault.
As an example, the finished product of obtained required specification is carried out preservative treatment using the method for impregnating resin shellac varnish
Specific method be：The finished product edge of obtained required size is impregnated into resin shellac varnish solution (epoxy resin, polyester resin, third
Olefin(e) acid resin, alkyd resin, varnish etc.) in, make to adhere to one layer of resin glue enamelled coating at finished product peripheral fault surface, then again will
It, which toasts 0.5~5h at 80~200 DEG C, makes shellac varnish layer cure, and it is anti-that which can prevent inner magnet material from oxidation corrosion occurs
It answers, anti salt spray corrosion effect can be played.
As an example, using the method for inorganic coating agent and resin shellac varnish is impregnated by the finished product of obtained required specification
Carry out preservative treatment specific method be：First by the finished product edge of obtained required size impregnate inorganic coating agent (phosphate or
Chromate) solution, reaction is brought it about, and toast 0.5h~5h at 80~200 DEG C, one layer will be formed at peripheral fault surface
Then protection against oxidation film layer is impregnated resin shellac varnish solution (epoxy resin, polyester resin, acrylic resin, alkyd tree again
Fat, varnish etc.), 0.5h~5h is toasted at 80~200 DEG C, ultimately forms one layer of very thin composite protection layer, the complex protection
Layer is due to having two layers of protection, anticorrosion ability more good.
As an example, using the laminating PET film in surface and carrying out the method for pack edge reason by obtained required specification
Finished product carry out preservative treatment specific method be：First by each laminating one layer of PET of the finished product upper and lower surface of obtained required size from
It is close to carry out roll-in fitting by roller for type film, then by die-cutting process by surface PET release films from from finished product outer edge one
Cut off at set a distance (1~5mm), due to above and below edge PET release films be bonded by layers of two-sided it is close, and by finished product packet
It is wrapped in middle layer, therefore can prevent the extreme environments such as external perishable atmosphere or moisture from influencing finished surface and edge and giving birth to
Rust, to play anti salt spray corrosion effect, it is ensured that the stability of its electromagnetic performance.
In conclusion the present invention provides a kind of electromagnetic shielding composite laminate magnetic material structures and preparation method thereof, institute
Stating electromagnetic shielding composite laminate magnetic material structures includes：Magnetically soft alloy strip material structure, including at least one layer of soft magnetism close
The golden steel band bed of material；Ferrite magnetic material layer or magnetic powder class glue material layer, adhere on the magnetically soft alloy strip material structure
Surface.The present invention the electromagnetic shielding be with composite laminate magnetic material structures include the magnetically soft alloy steel band bed of material and iron oxygen
The composite lamainated structure of body magnetic material layer or magnetic powder class glue material layer, in electromagnetic shielding composite laminate magnetic material structures
When as wireless charging antifreeze plate, both ensured magnetically soft alloy strip material in lower frequency (<High magnetic permeability 500kHz)
Equal soft magnet performances, but taken into account ferrite, magnetic powder class glue material upper frequency (<Low loss characteristic when 20MHz), while examining again
Having considered the antifreeze plate at the coil back side prevents supersaturated exception in high current wireless charging, can using this composite lamainated structure
The performance advantage of comprehensive two kinds of materials, has good magnetism isolating effect, reduces fever energy consumption problem, and the applying frequency magnetic material is big
(100kHz~20MHz) is widened greatly, can meet the wireless chargings electromagnetic shielding demand such as Qi and A4WP simultaneously, to improving its charging
Efficiency and charging distance have great importance.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (17)
1. a kind of electromagnetic shielding composite laminate magnetic material structures, which is characterized in that the electromagnetic shielding composite laminate magnetic
Property material structure includes：
Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band bed of material；
Ferrite magnetic material layer or magnetic powder class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.
2. electromagnetic shielding composite laminate magnetic material structures according to claim 1, it is characterised in that：The electromagnetic screen
It covers and further includes with composite laminate magnetic material structures：
Protective film adheres on the magnetically soft alloy strip material structure far from the ferrite magnetic material layer or the magnetic powder class
The surface of glue material layer；
First PET release films adhere on surface of the protective film far from the magnetically soft alloy strip material structure；
2nd PET release films, adhere on the ferrite magnetic material layer or the magnetic powder class glue material layer is closed far from the soft magnetism
The surface of golden strip material structure.
3. electromagnetic shielding composite laminate magnetic material structures according to claim 2, it is characterised in that：The soft magnetism closes
Golden strip material structure includes opposite first surface and second surface, the first surface of the magnetically soft alloy strip material structure
And second surface is equipped with the first adhesive layer；The ferrite magnetic material layer or the magnetic powder class glue material layer are via described first
Adhesive layer adheres on the first surface of the magnetically soft alloy strip material structure；The protective film is pasted via first adhesive layer
It is placed in the second surface of the magnetically soft alloy strip material structure；The 2nd PET release films are adhered on via the second adhesive layer
The surface of the ferrite magnetic material layer or the magnetic powder class glue material layer far from the magnetically soft alloy strip material structure.
4. electromagnetic shielding composite laminate magnetic material structures according to claim 1, it is characterised in that：The soft magnetism closes
Golden strip material structure is to include the magnetically soft alloy steel band bed of material described in multilayer and replace with the magnetically soft alloy steel band bed of material
The laminated construction of stacked third adhesive layer.
5. electromagnetic shielding composite laminate magnetic material structures according to claim 1, it is characterised in that：The soft magnetism closes
Golden strip material structure is banded structure, and the ferrite magnetic material layer or magnetic powder class glue material layer are banded structure.
6. electromagnetic shielding composite laminate magnetic material structures according to claim 1 or 5, it is characterised in that：The electricity
Magnetic screen composite laminate magnetic material structures further include erosion resistant coating, and the exposed soft magnetism is at least completely covered in the erosion resistant coating
The side and end face of alloyed steel strip material layer, and the exposed ferrite magnetic material layer or the magnetic powder is at least completely covered
The side and end face of class glue material layer.
7. a kind of preparation method of electromagnetic shielding composite laminate magnetic material structures, which is characterized in that the preparation method packet
Include following steps：
1) magnetically soft alloy strip material structure is prepared, the magnetically soft alloy strip material structure includes at least one layer of magnetically soft alloy steel
The band bed of material；
2) ferrite magnetic material layer or magnetic powder class glue material layer are prepared；
3) the magnetically soft alloy strip material structure is adhered on to the table of the ferrite magnetic material layer or magnetic powder class glue material layer
Face.
8. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 7, it is characterised in that：
In step 1), prepares magnetically soft alloy strip material structure and include the following steps：
The magnetically soft alloy steel band bed of material 1-1) is provided；
1-2) the magnetically soft alloy steel band bed of material is made annealing treatment.
9. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 7, it is characterised in that：
In step 1), prepares magnetically soft alloy strip material structure and include the following steps：
The multilayer magnetically soft alloy steel band bed of material 1-1) is provided；
Laminated layer 1-2) is provided；
The magnetically soft alloy steel band bed of material is replaced with the adhesive layer 1-3) and is fit together, includes described in multilayer to be formed
The laminated construction of the magnetically soft alloy steel band bed of material and the adhesive layer being alternately superimposed on the magnetically soft alloy steel band bed of material.
10. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 9, feature exist
In：Step 1-1) and step 1-2) between further include the steps that making annealing treatment the magnetically soft alloy steel band bed of material.
11. the electromagnetic shielding preparation method of composite laminate magnetic material structures according to claim 8 or 10, feature
It is：The magnetically soft alloy steel band bed of material is carried out annealing to include the following steps：
The magnetically soft alloy steel band bed of material is wound into toroidal core；
By the toroidal core as in heat-treatment furnace；
The heat-treatment furnace is vacuumized in advance using vacuum-pumping valve and vacuum pump, and keeps true in the heat treatment
Pneumatics power maintains -0,05MPa~-0.1MPa, and the time persistently vacuumized is 10min~120min；
The vacuum valve and the vacuum pump are closed, tracheae charging valve is opened, protection gas is filled with into the heat-treatment furnace
Body, it is ensured that inert atmosphere pressure closes the tracheae charging valve after being 0~0.1Mpa in the heat-treatment furnace；
The heat treatment in-furnace temperature is warming up to 200 DEG C~800 DEG C, room temperature is down to after keeping the temperature 0.5h~4h.
12. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 7, feature exist
In：Further include the steps that the magnetically soft alloy strip material structure is subjected to fragmentation processing after step 1).
13. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 7, feature exist
In：In step 2), prepares magnetic powder class glue material layer and include the following steps：
Soft magnetism powder 2-1) is provided；
Glue material 2-2) is provided；
It is stirred evenly after 2-3) mixing the soft magnetism powder in proportion with the glue material, coated on being carried out on PET polyester films
Drawout；
2-4) by step 2-3) obtained structure carries out hot pressing and is thinned to can be obtained the magnetic powder class glue material layer.
14. wanting the preparation method of composite laminate magnetic material structures of the electromagnetic shielding described in 7 according to right, it is characterised in that：
Further include following steps after step 3)：
4) protective film is provided, the protective film is adhered on into the magnetically soft alloy strip material structure far from the ferrimagnetism
The surface of material layer or magnetic powder class glue material layer；
5) in the protective film, the surface far from the magnetically soft alloy strip material structure forms PET release films, and in the iron
It is release that the surface of oxysome magnetic material layer or magnetic powder class glue material layer far from the magnetically soft alloy strip material structure forms the PET
Film.
15. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 14, feature exist
In：Further include after step 5)：
6) the step of structure that step 5) obtains being die cut, to obtain the finished product of required specification.
16. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 15, feature exist
In：Further include after the structure that step 5) obtains is die cut
7) the step of finished product of obtained required specification being subjected to preservative treatment.
17. the preparation method of electromagnetic shielding composite laminate magnetic material structures according to claim 16, feature exist
In：In step 7), method, the method for impregnating resin shellac varnish, immersion inorganic coating agent and the resin for impregnating inorganic coating agent are used
The laminating PET film of the method for the shellac varnish or surface and method for carrying out pack edge reason prevents the finished product of obtained required specification
Corruption processing.
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| CN109788729A (en) * | 2018-12-29 | 2019-05-21 | 上海威斯科电子材料有限公司 | A kind of manufacturing method being electromagnetically shielded piece |
| CN109795207A (en) * | 2019-01-08 | 2019-05-24 | 信维通信（江苏）有限公司 | A kind of electromagnetic shielding piece and preparation method thereof |
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