CN107464602A - A kind of film body for shielding electromagnetism - Google Patents
A kind of film body for shielding electromagnetism Download PDFInfo
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- CN107464602A CN107464602A CN201710835750.4A CN201710835750A CN107464602A CN 107464602 A CN107464602 A CN 107464602A CN 201710835750 A CN201710835750 A CN 201710835750A CN 107464602 A CN107464602 A CN 107464602A
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- film body
- shielding
- conductive layer
- cable
- layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/002—Auxiliary arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulated Conductors (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The embodiment of the invention discloses a kind of film body for shielding electromagnetism, it is related to wire rod manufacturing field, is easily broken off for solving the film body of existing shielding electromagnetism, the problem of preparation process is to time and big power consumption.The film body that the present invention is used for the shielding electromagnetism of cable includes the first metal layer, conductive layer and diaphragm；The first metal layer is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；Conductive layer is arranged on the first metal layer, and for shielding electromagnetic interference, conductive layer includes curing agent, metallic and the polyurethane for bearing metal particle；Diaphragm is arranged on conductive layer; for providing protection to the film body for shielding electromagnetism; the first metal layer be by gold, silver, copper, nickel and aluminium at least one of the metallic film that forms; or; for among gold, silver, copper, nickel and aluminium at least two alloy firm, to cause the interference of the first metal layer shielding electromagnetism while be used as conducting medium.
Description
Technical field
The present invention relates to wire rod manufacturing field, and in particular to a kind of film body for shielding electromagnetism.
Background technology
With signal transmission and/or power delivery cable production industry, in order to reduce impedance, decay, anti-stop signal
Interference and the loss that is lost in during in order to prevent internal transmission, it will usually wire rod addition electro-magnetic screen layer is electromagnetically shielded
Processing.A kind of common practice is to carry out one layer to conductor using minimum two layers or the manufacturing procedure of shielding material and least twice
One layer of cladding, i.e., in completion generation conductor and on conductor outside surfaces, covering is outer rear, first needs one layer of wheat drawing aluminium foil of cladding,
The enterprising row metal braiding layer of aluminium foil then is drawn in wheat, due to being woven with mesh, according to the requirement of the effectiveness of cable, is needed
The cladding braiding more than once is carried out, i.e. one layer of wheat draws aluminium foil to combine one or more layers wire sheathing, to reach demand
Coverage rate.However, by the way of this electromagnetic shielding, due to needing the cladding more than once to weave process, complex procedures, and
And need to consume substantial amounts of raw material, invest substantial amounts of equipment and be used to weave, cause production cost to greatly improve, and due to gold
Belonging to braiding layer needs process, the pollutions to environment such as plating larger.
To solve the above problems, a kind of existing film body that can add electro-magnetic screen layer to wire rod without braiding layer, will be existing
The film body that the process of repeatedly cladding braiding in need is changed into only needing once to coat shielding electromagnetism can reach same or more preferable effect
Fruit, greatly reduce the consumption of raw material, reduce production cost, improve production efficiency, additionally due to without processes such as plating, reduce
Pollution on the environment.The film body of the type shielding electromagnetism is multi-layer film structure, and crucial work is played to electromagnetic shielding in the structure
It is conductive layer, conductive layer is typically using the hybrid resin of metallic and bearing metal particle composition.
But the conductive layer for using resin to make in the film body of shielding electromagnetism exposes shortcomings, for example resin is flexible
Property deficiency, be fabricated to after conductive layer and easily produce fracture situation, for example the solution that resin makes is after coating, hardening time length,
Generally require 4-5 days, carried out in the solidification room higher than 110 DEG C of conditions, the consumption to time and electric energy is larger etc..
The content of the invention
The present invention provides a kind of film body of the shielding electromagnetism for cable, easy for solving the film body of existing shielding electromagnetism
Fracture, the problem of preparation process is to time and big power consumption.
The one side of the embodiment of the present invention provides a kind of film body of the shielding electromagnetism for cable, including：
The first metal layer, conductive layer and diaphragm；
The first metal layer is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；
The conductive layer is arranged on the first metal layer, and for shielding electromagnetic interference, the conductive layer includes solidification
Agent, metallic and the polyurethane for carrying the metallic；
The diaphragm is arranged on the conductive layer, for providing protection to the film body of the shielding electromagnetism；
The first metal layer be by gold, silver, copper, nickel and aluminium at least one of the metallic film that forms, or, be
At least two alloy firm among gold, silver, copper, nickel and aluminium.
Optionally, the conductive layer also includes epoxy resin, for increasing the viscosity of the conductive layer.
Optionally, the thickness of the first metal layer is 3 microns to 50 microns.
Optionally, the content of the polyurethane in the conductive layer can be 10%-30%.
Optionally, the conductive layer is to include the conductive metallic of the anisotropy that longitudinally turns on, and the anisotropy is conductive
Metallic be connected with the first metal layer while form horizontal conducting, with formed a loop electromagnetic waveguide is drawn
Go.
Optionally, fire retardant is also included in conductive layer, the ratio of quality of the fire retardant in the conductive layer is
1% -10%.
Optionally, the metallic is the combination particle that two or more metal is formed.
Optionally, the diaphragm is engineering films.
Optionally, the ratio that the metallic accounts for the quality of the conductive layer is 10% -80%.
Optionally, the film body of the shielding electromagnetism also includes insulating barrier, and the insulating barrier is arranged on the conductive layer, or
Person is arranged on the diaphragm.
Optionally, the insulating barrier includes polyurethane and coloring pigment.
Optionally, the insulating barrier also includes filler, for strengthening filtering function of the insulating barrier to electromagnetic wave；
The filler includes the one or more in aluminium hydroxide, silica, polyaniline and polyacetylene.
Optionally, the insulating barrier also includes fire retardant.
Optionally, the ratio of the quality in insulating barrier shared by polyurethane is 70% -99%, shared by the coloured material
The ratio of quality is 1% -30%, and the ratio shared by the fire retardant is 1% -10%, the ratio of the quality shared by the filler
Rate is 5% -40%, and the thickness of the insulating barrier is 5 microns -50 microns.
Optionally, the film body of the shielding electromagnetism also includes second metal layer, and the second metal layer is arranged at described lead
In electric layer, for coordinating the conductive layer to be shielded.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
The present invention provide it is a kind of for cable shielding electromagnetism film body, shield electromagnetism film body include the first metal layer,
Conductive layer and diaphragm；The first metal layer is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and as Jie
Matter；Conductive layer is arranged on the first metal layer, and for shielding electromagnetic interference, conductive layer includes curing agent, metallic and use
In the polyurethane of bearing metal particle；Diaphragm is arranged on conductive layer, for shield electromagnetism film body provide protection, first
Metal level be by gold, silver, copper, nickel and aluminium at least one of the metallic film that forms, or, be gold, silver, copper, nickel and aluminium it
In at least two alloy firm.Because the pliability of polyurethane is more outstanding than resin, there is pole after being fabricated to the film body of shielding electromagnetism
Good flexibility and toughness, the requirement to the degree of packing when being wrapped around on electric wire can be reached；In addition, polyurethane is being made
After being made solution coating, hardening time is short, and solidification temperature is low, and the solidification room typically at 2 days, less than 80 DEG C is carried out, and saves the time
With electric energy, producing efficiency is improved, reduces production cost.
Brief description of the drawings
Fig. 1 is a structural representation of the film body for the shielding electromagnetism that the present invention is used for cable；
Fig. 2 is another structural representation of the film body for the shielding electromagnetism that the present invention is used for cable；
Fig. 3 is another structural representation of the film body for the shielding electromagnetism that the present invention is used for cable；
Fig. 4 is another structural representation of the film body for the shielding electromagnetism that the present invention is used for cable；
Fig. 5 is the radial cross section using the wire rod of the film body production of the shielding electromagnetism of the present invention.
Embodiment
The embodiments of the invention provide a kind of film body of the shielding electromagnetism for cable, enable at the shielding of cable
During reason, it is only necessary to once coat with regard to that can solve shielding problem, and there is good pliability, cost of manufacture is lower.
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
Term " first ", " second ", " the 3rd " in description and claims of this specification and above-mentioned accompanying drawing, "
The (if present)s such as four " are for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution so uses can exchange in the appropriate case, so that the embodiments described herein can be with except illustrating herein
Or the order beyond the content of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment need not limit
In those steps or unit for clearly listing, but may include not list clearly or for these processes, method, production
The intrinsic other steps of product or equipment or unit.
Prior art is typically employed in wheat and draws the mode that the enterprising row metal of aluminium foil weaves to wrap up cable, forms line
The electro-magnetic screen layer of cable.Due to being woven with mesh, in order to strengthen screening rate, prior art generally requires multiple braiding, reduced
Production efficiency, increase production cost, add the diameter of the cable after parcel so that the pliability of cable is very poor.
In order to solve the above problems, prior art proposes that one kind can add electro-magnetic screen layer without braiding layer to wire rod again
Shielding electromagnetism film body, the process of the multiple cladding braiding of existing needs is changed into only needing once coating the film body of shielding electromagnetism i.e.
Can reach same or more preferable effect, greatly reduce the consumption of raw material, reduce production cost, improve production efficiency, in addition by
In without processes such as plating, pollution on the environment is reduced.The film body of the type shielding electromagnetism is multi-layer film structure, in the structure
What electromagnetic shielding was played a key effect is conductive layer, and conductive layer is typically the mixing using metallic and bearing metal particle
Type resin composition.
But the conductive layer made using resin in the film body of shielding electromagnetism exposes following shortcomings：Resin it is soft
Toughness deficiency, it is fabricated to after conductive layer and easily produces fracture situation；The solution that resin makes after coating, grow by hardening time, and one
As need 4-5 days, carried out in the solidification room higher than 110 DEG C of conditions, the consumption to time and electric energy is larger；Resin is in cladding metal
During particle, consolidation is coated, easily causing between metallic and particle can not contact problems, it is therefore desirable to increases metallic
Usage amount, but after metallic increase, easily cause production puzzlement when metallic excessively influences to make product, metal
Particle is too many, and in the coating of conductive layer, layer on surface of metal, which easily produces cut, influences outward appearance, and the increase of metallic is also direct
Production cost is influenceed, causes production cost to rise 10%-30%.
To solve the above problems, the present invention provides a kind of film body of the shielding electromagnetism for cable, for ease of understanding, please join
Fig. 1 is read, Fig. 1 is the structural representation of the film body of the shielding electromagnetism for being used for cable of the embodiment of the present invention, shields the film body 1 of electromagnetism
Including the first metal layer 11, conductive layer 12 and diaphragm 13；
The first metal layer 11 is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；
Conductive layer 12 is arranged on the first metal layer 11, and for shielding electromagnetic interference, conductive layer 12 includes curing agent, metal
Particle and the polyurethane for bearing metal particle；
Diaphragm 13 is arranged on conductive layer 12, for providing protection to the film body 1 for shielding electromagnetism.
It should be noted that the first metal layer 11 can be as power delivery in auxiliary cable and/or the medium of signal transmission.
As can be seen that the film body 1 of shielding electromagnetism is really formed by stacking by three-decker, the shielding electromagnetism eventually formed
Film body 1 seems it is still a film structure in appearance, and the band of various different in width can be cut to according to application demand
Shape shields the film body of electromagnetism, to be adapted to the wire rod of different demands.
Polyurethane (polyesters and polyethers), polyurethane elastomer are a kinds in polyurethane synthetic material, and it is tied
Structure has soft, hard two segments, can carry out MOLECULE DESIGN to it and assign strength of materials height, wear-resisting, oil resistant, and good toughness etc. is excellent
Different in nature energy, it has the rigidity of the high resiliency and north material of rubber, also known as " abrasive rubber ".Content in the conductive layer is
10%-70%.As an example, the main component of polyurethane can be diisocyanate, di-isocyanate derivatives, polyisocyanate hydracid
Ester, PEPA, carbonic ether, phosphate, glycol, dicarboxylic acids and triol.
Make conductive layer using resin in the prior art to compare, making conductive layer using polyurethane has the following advantages that：
1st, the pliability of polyurethane is more outstanding than resin, be fabricated to shielding electromagnetism film body after have splendid flexibility with it is tough
Property, the requirement to the degree of packing when being wrapped around on electric wire can be realized；
2nd, for polyurethane after solution coating is fabricated to, hardening time is short, and solidification temperature is low, typically at 2 days, less than 80 DEG C
Solidify room to carry out, save time and power consumption, reduce production cost；
3rd, the molecular structure of polyurethane is three-dimensional structure, when being combined with metallic, will not be coated metallic completely
Closely, when therefore compared with resin, it is possible to reduce metallic quantity and reach same effect when being mixed with resin, same
During condition requirement, while cost can be reduced than the reduction 5-15% metallic quantity using resin using polyurethane；
4th, using the conductive layer of polyurethane, easily it is coated with production, does not easily cause the situation of bad order after production, drop
Low fraction defective.
Curing agent is used to play liquid form product accelerative action in curing, and polyurethane plays solid after solution coating is fabricated to
Change acts on, and content in the conductive layer can be 10%-30%.
It can be seen that the film body of shielding electromagnetism of the invention is enabled in the shielding processing of cable, it is only necessary to is once coated
With regard to that can solve shielding problem, also, because the pliability of polyurethane is more outstanding than resin, there is pole after being fabricated to the film body of shielding electromagnetism
Good flexibility and toughness, the requirement to the degree of packing when being wrapped around on electric wire can be reached；In addition, polyurethane is being made
After being made solution coating, hardening time is short, and solidification temperature is low, and the solidification room typically at 2 days, less than 80 DEG C is carried out, and saves the time
With electric energy, producing efficiency is improved, reduces production cost.
Optionally, the thickness of the first metal layer 11 is 3 microns to 50 microns, it is to be understood that the first metal layer 11
Thickness be that gauge or diameter of wire is bigger depending on the wire rod of different-diameter, the larger the first metal layer 11 of thickness, line can be chosen
Material diameter is smaller, can choose the smaller the first metal layer 11 of thickness, according to the different and different of actual wire rod, not limit specifically
It is fixed.
The first metal layer 11 be by gold, silver, copper, nickel and aluminium at least one of the metallic film that forms.It is appreciated that
It is that due to needing as first time screen layer and as medium, therefore the electric conductivity of the first metal layer 11 is also critically important
, thus the first metal layer 11 material need chosen from the stronger metal of electric conductivity, such as select gold, silver, copper, nickel and
One kind among aluminium, at least two alloy among this several metal can be also used certainly.
Conductive layer 12 can be the conductive metallic of side's property such as to include, and be full side due to waiting metallic of side's property conduction
Position conducting, its performance is also easier to adjust, and conduction property is improved easily by increase metallic quantity.
Or conductive layer 12 can also be to include the conductive metallic of anisotropy, the conductive metallic of anisotropy exists
Conductive effect in polyurethane longitudinally turns on, and is laterally not turned on, i.e., is being conducting perpendicular to the direction on the surface of conductive layer 12
, it is not turned on parallel to the direction on the surface of conductive layer 12, but side's property such as metallic cost ratio of anisotropy conduction is led
The metallic of electricity is lower.Because the embodiment of the present invention in the side of conductive layer 12 is provided with the first metal layer 11, first is utilized
Metal level 11 is connected with conducting particles to be remained to form horizontal conducting.Laterally, after longitudinal direction all turns on, a loop is formed by electromagnetic wave
Guiding is gone out, and prevents from disturbing the normal operation of cable.
The shape of metallic or their combination particle in conductive layer 12 can be graininess, sheet, dendroid
Or the rule such as flakes or irregular shape.
On the one hand polyurethane in conductive layer 12 is to be used to fix metallic, on the other hand and as metallic
Carrier.Wherein, the ratio that metallic accounts for the quality of conductive layer 12 is 10%-80%, and quality ratio change is embodied in two
Aspect, one is according to the different and different of the metallic used.Because the density of different metal element differs, and
The size of metallic is essentially identical size, therefore the metallic of same volume fraction accounts for conductive layer in conductive layer 12
12 quality ratio be it is different, the big metallic of density can take can be taken under same volume it is more.The second is due to
The demand of the performance of electromagnetic shielding differs, for example requires higher capability of electromagnetic shielding, then metallic accounts for conductive layer 12
The ratio of quality will be higher, and what is reflected is exactly that the distance between metallic in conductor layer 12 becomes closer to conductive
Performance is more preferably so that electromagnetic wave attenuation faster, and in the case where the requirement of capability of electromagnetic shielding is not very high, clipped wire
The ratio that son accounts for the quality of conductive layer 12 will be than relatively low, and the distance between metallic can be farther, and electric conductivity is relative to be weakened,
Electromagnetic wave attenuation speed is relatively slow, and therefore, the ratio of the quality for the conductive layer that the metallic in the conductive layer 12 takes can
It is adjusted according to demand, rather than in the prior art, during if desired for more preferable capability of electromagnetic shielding, it is necessary to repeatedly coated
Braiding, so as to waste lot of materials and to due to substantial amounts of wire netting pollution on the environment problem, and due to multiple
Cladding braiding can cause the flexibility of wire rod in itself to become excessively poor, many lines for requiring that flexibility is good and capability of electromagnetic shielding is good
Material can not be realized by the way of cladding weaves, and use the film body of the electromagnetic shielding of this programme, because thickness is very thin,
Itself is also flexible material, and the flexibility of wire rod will not be impacted.
Preferably, the thickness of conductive layer 12 is 3 microns to 50 microns.It should be noted that influence the thickness of conductive layer 12
Mainly there are two kinds of factors, one is the diameter of the wire rod of cladding is different, thickness differs, for example for thinner wire rod, leads
The ratio that the thickness of electric layer 12 can be done is relatively thin, and for the thicker wire rod of diameter, in order to ensure the reliability of wire rod, it is necessary to thicker
Need the comparison done thick to conductive layer 12, the second is can according to the electric conductivity of demand difference and thickness is different, need
The strong wire rod of derivation electrical property can use the larger conductive layer 12 of thickness, and thick conductive layer 12 has bigger cross-sectional area, from
It is relative and electric conductivity is also stronger, smaller and higher to the wire rod softness requirements wire rod of electric conductivity demand, then it can be selected
The less conductive layer 12 of thickness ratio, adjust, do not limit with specific reference to actual conditions.
Optionally, the metallic that the side's of grade property is conductive or anisotropy is conductive can be included among gold, silver, copper, nickel and aluminium extremely
A kind of few metallic of composition.The selection of metallic, the stronger metallic of conductive capability can be chosen, can be accomplished in gold
Belong to mass particle ratio it is relatively small in the case of reach identical electric conductivity；Such as choose the stronger gold, silver of conductive capability,
One kind among copper, nickel and aluminium, certainly, another mode can be also used, i.e. metallic is that outer layer is that conductive capability is strong
The coat of metal, internal layer need to change metal and the strong metal of conductive capability certainly from the electric conductivity metal weak compared with the coat of metal
With good associativity, metallic made of the metal for being better than and being selected completely using internal layer can be reached, specific choose can
Depending on the limitation of production cost and the requirement of the wire rod of production.
Preferably, the metallic in conductive layer 12 can also be all or be partly two or more metal shape
Into combination particle, such as gold and silver combination particle, using particle is combined as the metallic in conductive layer 12, production can be widened
Product are to shielding electromagnetic waves frequency range, the limitation for overcoming single metallic to be electromagnetically shielded.
Preferably, epoxy resin can also be included in conductive layer 12.In the film body of above-mentioned shielding electromagnetism, metallic exists
The ratio of quality in conductive layer 12 is generally 10% -80%.When the ratio of quality of the metallic in conductive layer 12 is excessive
When, metallic can influence the viscosity of polyurethane, cause the bonding deficiency between product structure layer, now can be in conductive layer 12
In the appropriate epoxy resin that adds improve polyurethane because sticky insufficient problem after addition metallic.But need what is illustrated
It is that epoxy resin can also be added without in conductive layer 12, main cause is that the effect of epoxy resin in the conductive layer is that adjustment is viscous
Property, when metallic quantity does not interfere with the viscosity of polyurethane in polyurethane, epoxy resin can be not added with.Except using
Epoxy resin increases viscosity to polyurethane, acrylate etc. can also be used to be modified polyurethane, to increase its viscosity.
Preferably, fire retardant can also be included in conductive layer 12, such as can be in conduction when there is resistance to combustion demand to cable
Fire retardant is added in layer 12, the ratio of quality of the fire retardant in conductive layer 12 is generally 1% -10%.
Film body 1 of the diaphragm 13 for guard shield electromagnetism, therefore typically select wear-resisting, waterproof, with certain electrically exhausted
The engineering films of edge performance, such as polyethylene terephtalate film, either polyimides PI films or polychlorostyrene
Ethene PVC film, either polypropylene PP film or polyethylene PE film, or ethylene-vinyl acetate copolymer eva film,
Either polycarbonate film or methyl methacrylate MMA films, or cast polypropylene film CPP films, Huo Zhebing
Alkene nitrile-BS ABS films, or polyamide PA films etc..Preferably, the second diaphragm 25 can select
Use PET film.PET material has advantages below：1. electrical insulation capability is good；2. heat distortion temperature and long-term use of temperature are thermoplastics
Highest in property general engineering plastic；2. because heat-resisting height, REINFORCED PET impregnates 10S in 250 DEG C of solder bath, almost unchanged
Shape is also non-discolouring, is particularly suitable for preparing electronics, the electric parts of soldering；3. bending strength is high, modulus of elasticity is high, creep resistance and tired
Labor is also fine, and case hardness is high, and mechanical performance is close with thermosetting plastics；4. by production PET institute's spent glycols are than production
The price of butanediol used in PBT almost cheap half, so PET resin and REINFORCED PET are that price is most rational in engineering plastics,
With very high cost performance.Optionally, the thickness of diaphragm 13 can be 5 microns to 50 microns.
Diaphragm 13 provided by the invention is provided beyond protection in the film body 1 to shielding electromagnetism, also with certain insulation
Performance, therefore the film body 1 of shielding electromagnetism provided by the invention disclosure satisfy that to the demand of the less demanding cable of insulating properties
In the case of, cost can be reduced, reduces the diameter of the cable after the film body 1 of cladding shielding electromagnetism.
In actual use, insulation can also be set by shielding the film body 1 of electromagnetism on conductive layer 12 or on diaphragm 13
Layer, referring to Fig. 2, Fig. 2 is another structural representation of the film body of the shielding electromagnetism for being used for cable of the embodiment of the present invention, shielding
The film body 2 of electromagnetism includes the first metal layer 21, conductive layer 22, diaphragm 23 and insulating barrier 24；
The first metal layer 21 is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；
Conductive layer 22 is arranged on the first metal layer 21, and for shielding electromagnetic interference, conductive layer includes curing agent, clipped wire
Son and the polyurethane for bearing metal particle；
Insulating barrier 24 is arranged on conductive layer 22, and diaphragm 23 is arranged on insulating barrier 24, for the film to shielding electromagnetism
Body 2 provides protection.
With Fig. 1 corresponding to embodiment compare, in the embodiment of the present invention increase insulating barrier 24, it is possible to increase shield the film of electromagnetism
The insulating properties of body 2, internal electromagnetism leaked wave can be completely cut off, while stop interference of the external electromagnetic waves to electric wire.Work as electricity
When line cable is used for high-frequency high-speed transmission conditions, increases this insulating barrier 24 to strengthen protecting in the film body of shielding electromagnetism, work as electricity
When line cable is used for the transmission of general condition, it may not be necessary to which insulating barrier 24, the film body that can reduce shielding electromagnetism are produced into
This.
Preferably, insulating barrier 24 can include polyurethane and coloured material.Compared with resin, polyurethane has splendid exhausted
Edge, and preferably pliability and caking property, insulating barrier 24 replace resin using polyurethane, it is possible to reduce bad during production
Rate, reduce cost.Also, polyurethane is better than resin to the absorption function of electromagnetic wave, can improve the insulating properties of product.Coloring
Material can be inorganic pigment, such as carbon black or metallic pigments, or organic pigment, such as monoazo, bisazo, the phthalein mountain valley with clumps of trees and bamboo
Deng.Coloured material is used in the main function in insulating barrier 24 to carry out hue distinguishes and lucifuge effect etc..
Preferably, insulating barrier 24 can also include filler, and the filtering function for reinforced insulation layer to electromagnetic wave, filler can
With including the one or more in aluminium hydroxide, silica, polyaniline and polyacetylene.By filler addition in a insulating layer, energy
Enough play a part of filter electromagnetic ripple, further improve filter effect of the insulating barrier 24 to electromagnetic wave.
Fire retardant can also be included in insulating barrier 24, to improve the fire resistance for the film body 2 for shielding electromagnetism, enhancing shielding electricity
Protection of the film body 2 of magnetic to cable.
Preferably, the ratio of the quality in insulating barrier 24 shared by polyurethane is 70% -99%, the matter shared by coloured material
The ratio of amount is 1% -30%, and ratio shared by fire retardant is 1% -10%, the ratio of the quality shared by filler for 5% -
40%.The thickness of insulating barrier is 5 microns -50 microns.
It should be noted that the effect of diaphragm 23 and insulating barrier 24 in the film body of shielding electromagnetism is mainly to provide guarantor
Shield, wear-resistant, waterproof, insulation etc., therefore diaphragm 23 and insulating barrier 24 are arranged at the outermost layer of the film body of shielding electromagnetism, also
It is to say, it is farthest apart from cable conductors.But the relative position of diaphragm 23 and insulating barrier 24 therebetween does not limit, also
It is to say, insulating barrier 24 can also be arranged on diaphragm 23, positioned at the outermost layer of the film body of shielding electromagnetism.
The first metal layer 21, conductive layer 22 and the diaphragm 23 in film body 2 on shielding electromagnetism in the embodiment of the present invention,
The first metal layer 11, conductive layer 12 and the protective layer 13 in the film body 1 that electromagnetism is shielded in embodiment corresponding to Fig. 1 are referred to, this
Place repeats no more.
In order to accelerate electromagnetic wave to guide speed, capability of electromagnetic shielding is improved, referring to Fig. 3, Fig. 3 is the embodiment of the present invention
For another structural representation of the film body of the shielding electromagnetism of cable, shielding the film body 3 of electromagnetism includes the first metal layer 31, conduction
Layer 32, diaphragm 33 and second metal layer 34；
The first metal layer 31 is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；
Conductive layer 32 is arranged on the first metal layer 31, and for shielding electromagnetic interference, conductive layer 32 includes curing agent, metal
Particle and the polyurethane for bearing metal particle；
Second metal layer 34 is arranged on conductive layer 32, for coordinating conductive layer 32 to be shielded；
Diaphragm 33 is arranged on second metal layer 34, for providing protection to the film body for shielding electromagnetism.
The embodiment of the present invention can accelerate electromagnetic wave to guide speed, quickly by electromagnetic wave by increasing second metal layer 34
Take cable out of, preferably avoid electromagnetic wave from doing cable.Therefore, the use of second metal layer 34 with without using need according to electricity
Line cable determines to shielding demand, when electric wire is used for high-frequency high-speed transmission conditions, increases this second metal layer 34 to add
Effect is dredged soon, when electric wire is used for the transmission of general condition, it may not be necessary to second metal layer 34, while can reduce
Production cost.
Optionally, the thickness of second metal layer is 0.05 micron to 50 microns.Because the thickness of metal level directly affects electricity
The effect that magnetic wave is dredged, therefore take different modes to make the second metal according to the difference that electric wire is required shielding properties
Layer.For example the metal level of plating can be fabricated to 0.1um -3um, the thickness of product can be reduced, and metal level uses film material
During material, the metallic film of market sale at present is in more than 7um, and when requiring metallic film in more than 7um, price can be on multiple
Rise, influence production cost.
The first metal layer 31, conductive layer 32 and the diaphragm 33 in film body 3 on shielding electromagnetism in the embodiment of the present invention,
The first metal layer 11, conductive layer 12 and the protective layer 13 in the film body 1 that electromagnetism is shielded in embodiment corresponding to Fig. 1 are referred to, this
Place repeats no more.
The embodiment with reference to corresponding to Fig. 2 and Fig. 3, referring to Fig. 4, Fig. 4 is the shielding for cable of the embodiment of the present invention
Another structural representation of the film body of electromagnetism, shield electromagnetism film body 4 include the first metal layer 41, conductive layer 42, diaphragm 43,
Second metal layer 44 and insulating barrier 45；
The first metal layer 41 is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；
Conductive layer 42 is arranged on the first metal layer 41, and for shielding electromagnetic interference, conductive layer 42 includes curing agent, metal
Particle and the polyurethane for bearing metal particle；
Second metal layer 44 is arranged on conductive layer 42, for coordinating conductive layer 42 to be shielded；
Insulating barrier 45 is arranged on second metal layer 44, and diaphragm 43 is arranged on insulating barrier 45, for shielding
The film body of electromagnetism provides protection.
The first metal layer 41, conductive layer 42 and the diaphragm 43 in film body 4 on shielding electromagnetism in the embodiment of the present invention,
The first metal layer 11, conductive layer 12 and the protective layer 13 in the film body 1 that electromagnetism is shielded in embodiment corresponding to Fig. 1 are referred to, this
The insulating barrier 45 in the film body 4 of electromagnetism is shielded in inventive embodiments, refers to the film body that electromagnetism is shielded in embodiment corresponding to Fig. 2
Insulating barrier 24 in 2, the second metal layer 44 in the film body 4 of electromagnetism is shielded in the embodiment of the present invention, referred to real corresponding to Fig. 3
The second metal layer 34 in the film body 3 that electromagnetism is shielded in example is applied, here is omitted.
It should be noted that the effect of diaphragm 43 and insulating barrier 45 in the film body 4 of shielding electromagnetism is mainly to provide guarantor
Shield, wear-resistant, waterproof, insulation etc., therefore diaphragm 43 and insulating barrier 45 are arranged at the outermost layer of the film body 4 of shielding electromagnetism,
It is that is farthest apart from cable conductors.But the relative position of diaphragm 43 and insulating barrier 45 therebetween does not limit,
That is insulating barrier 45 can also be arranged on diaphragm 43, positioned at the outermost layer of the film body of shielding electromagnetism.Especially, city
Diaphragm 43 can be directly purchased on field the material completed is combined with second metal layer 44, therefore, directly use diaphragm 43
The material completed is combined with second metal layer 44 and makes the film body 4 of shielding electromagnetism, then insulating barrier 45 is coated on diaphragm 43,
Production process can be reduced, improves production efficiency.
The film body 1 of the shielding electromagnetism of the embodiment of the present invention, shield the film body 2 of electromagnetism, the film body 3 for shielding electromagnetism and shielding
The film body 4 of electromagnetism can be widely applied for the electric wire electricity that all kinds of needs of electric power, communication and signal transmission etc. are shielded
Cable.
As shown in figure 5, be the longitudinal section view of the wire rod produced using the film body 1 of the shielding electromagnetism of the embodiment of the present invention,
It is followed successively by conductor 51, is outer by 521, the first metal layer 11, conductive layer 12, diaphragm 13 and outer by 522 from inside to outside, wherein
One metal level 11, conductive layer 12 and diaphragm 13 are the part of the film body 1 of shielding electromagnetism.As can be seen that relative to existing
Technology covers wheat and draws aluminium foil and wire sheathing repeatedly, can greatly reduce production cost and the equipment investment of wire rod, Yi Ji great
The big wire production that reduces is due to electroplating pollution on the environment.Using the embodiment of the present invention shielding electromagnetism film body 2 or
Each layer is in the distribution situation of radial direction, art technology in the wire rod that the film body 3 for shielding electromagnetism or the film body 4 for shielding electromagnetism produce
Personnel easily show that here is omitted according to embodiment illustrated in fig. 5.
More than, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to foregoing reality
Example is applied the present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each
Technical scheme described in embodiment is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed
Or replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a kind of film body for shielding electromagnetism, it is characterised in that applied in cable, the film body of the shielding electromagnetism includes the first gold medal
Belong to layer, conductive layer and diaphragm；
The first metal layer is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and being used as medium；
The conductive layer is arranged on the first metal layer, and for shielding electromagnetic interference, the conductive layer includes curing agent, gold
Belong to particle and the polyurethane for carrying the metallic；
The diaphragm is arranged on the conductive layer, for providing protection to the film body of the shielding electromagnetism；
The first metal layer be by gold, silver, copper, nickel and aluminium at least one of the metallic film that forms, or, be gold, silver,
At least two alloy firm among copper, nickel and aluminium.
2. the film body of the shielding electromagnetism according to claim 1 for cable, it is characterised in that
The thickness of the first metal layer is 3 microns to 50 microns.
3. the film body of the shielding electromagnetism according to claim 1 for cable, it is characterised in that the polyurethane is in conduction
Content in layer can be 10%-30%.
4. the film body of the shielding electromagnetism according to claim 1 for cable, it is characterised in that the conductive layer is to include
The metallic of the anisotropy conduction longitudinally turned on, the conductive metallic of the anisotropy are connected together with the first metal layer
When form horizontal conducting, with formed a loop by electromagnetic waveguide draw go.
5. the film body of the shielding electromagnetism according to claim 1 for cable, it is characterised in that also wrapped in the conductive layer
Fire retardant is included, the ratio of quality of the fire retardant in the conductive layer is 1% -10%.
6. the film body of the shielding electromagnetism according to any one of claim 1 to 5 for cable, it is characterised in that described
The film body of shielding electromagnetism also includes insulating barrier, and the insulating barrier is arranged on the conductive layer, or is arranged at the diaphragm
On.
7. the film body of the shielding electromagnetism according to claim 6 for cable, it is characterised in that the insulating barrier includes poly-
Urethane and coloring pigment.
8. the film body of the shielding electromagnetism according to claim 7 for cable, it is characterised in that the insulating barrier also includes
Filler, for strengthening filtering function of the insulating barrier to electromagnetic wave；
The filler includes the one or more in aluminium hydroxide, silica, polyaniline and polyacetylene.
9. the film body of the shielding electromagnetism according to claim 8 for cable, it is characterised in that the insulating barrier also includes
Fire retardant.
10. the film body of the shielding electromagnetism according to claim 9 for cable, it is characterised in that gather in the insulating barrier
The ratio of quality shared by urethane is 70% -99%, and the ratio of the quality shared by the coloured material is 1% -30%, described
Ratio shared by fire retardant is 1% -10%, and the ratio of the quality shared by the filler is 5% -40%, the insulating barrier
Thickness is 5 microns -50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710835750.4A CN107464602A (en) | 2017-09-16 | 2017-09-16 | A kind of film body for shielding electromagnetism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710835750.4A CN107464602A (en) | 2017-09-16 | 2017-09-16 | A kind of film body for shielding electromagnetism |
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| CN107464602A true CN107464602A (en) | 2017-12-12 |
Family
ID=60552488
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710835750.4A Withdrawn CN107464602A (en) | 2017-09-16 | 2017-09-16 | A kind of film body for shielding electromagnetism |
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| CN (1) | CN107464602A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366517A (en) * | 2018-01-26 | 2018-08-03 | 安徽建筑大学 | Wrapping type electromagnetic shielding film for optical cable |
| CN113473828A (en) * | 2021-06-21 | 2021-10-01 | 中国原子能科学研究院 | Shielding device for radioactive waste liquid glass solidification treatment system |
| CN114919264A (en) * | 2022-05-27 | 2022-08-19 | 南通大学 | Anti-folding damage high-performance electromagnetic shielding material and preparation method thereof |
| WO2023174246A1 (en) * | 2022-03-14 | 2023-09-21 | 吉林省中赢高科技有限公司 | Novel shielding material based connector assembly, and vehicle |
-
2017
- 2017-09-16 CN CN201710835750.4A patent/CN107464602A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366517A (en) * | 2018-01-26 | 2018-08-03 | 安徽建筑大学 | Wrapping type electromagnetic shielding film for optical cable |
| CN108366517B (en) * | 2018-01-26 | 2019-10-15 | 安徽建筑大学 | Wrapping type electromagnetic shielding film for optical cable |
| CN113473828A (en) * | 2021-06-21 | 2021-10-01 | 中国原子能科学研究院 | Shielding device for radioactive waste liquid glass solidification treatment system |
| WO2023174246A1 (en) * | 2022-03-14 | 2023-09-21 | 吉林省中赢高科技有限公司 | Novel shielding material based connector assembly, and vehicle |
| CN114919264A (en) * | 2022-05-27 | 2022-08-19 | 南通大学 | Anti-folding damage high-performance electromagnetic shielding material and preparation method thereof |
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