CN106952678A - A kind of electromagnetic shielding film for cable - Google Patents
A kind of electromagnetic shielding film for cable Download PDFInfo
- Publication number
- CN106952678A CN106952678A CN201710295654.5A CN201710295654A CN106952678A CN 106952678 A CN106952678 A CN 106952678A CN 201710295654 A CN201710295654 A CN 201710295654A CN 106952678 A CN106952678 A CN 106952678A
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- Prior art keywords
- electromagnetic shielding
- shielding film
- conductive layer
- cable
- layer
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Classifications
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- 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
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
-
- 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
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
Abstract
The embodiment of the invention discloses a kind of electromagnetic shielding film for cable, it is related to wire rod manufacture field, is easily broken off for solving existing electromagnetic shielding film, the problem of preparation process is to time and big power consumption.The present invention includes the first metal layer, conductive layer and diaphragm for the electromagnetic shielding film of cable；The first metal layer is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and 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 electromagnetic shielding film.
Description
Technical field
Field is manufactured the present invention relates to wire rod, and in particular to a kind of electromagnetic shielding film for cable.
Background technology
In the cable production industry with signal transmission and/or power delivery, in order to reduce impedance, decay, anti-stop signal
Interference and in order to prevent the loss being lost in during internal transmission, it will usually to wire rod addition electro-magnetic screen layer be electromagnetically shielded
Processing.A kind of common practice is, one layer is carried out to conductor using the manufacturing procedure of minimum two layers or shielding material and least twice
One layer of cladding, that is, complete generation conductor and covered on conductor outside surfaces outer rear, first needing one layer of wheat of cladding to draw aluminium foil,
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 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, investing substantial amounts of equipment is used to weave, and causes production cost to greatly improve, and due to gold
Belonging to braiding layer needs the processes such as plating, and the pollution to environment is larger.
To solve the above problems, it is existing it is a kind of without braiding layer just can to wire rod add electro-magnetic screen layer electromagnetic shielding
Film, the process of the multiple cladding braiding of existing needs is changed into only needing once coating screened film can reach same or more preferable effect
Really, greatly reduce the consumption of raw material, reduce production cost, improve production efficiency, additionally due to without processes such as plating, reducing
Pollution on the environment.Such electromagnetic shielding film is multi-layer film structure, electromagnetic shielding is played a key effect in the structure
It is conductive layer, conductive layer is typically the hybrid resin composition using metallic and bearing metal particle.
But the conductive layer for using resin to make in electromagnetic shielding film exposes shortcomings, such as the pliability of resin is not
Foot, is fabricated to after conductive layer and easily produce fracture situation, such as after coating, hardening time is long, typically for the solution that resin makes
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 etc..
The content of the invention
The present invention provides a kind of electromagnetic shielding film for cable, is easily broken off for solving existing electromagnetic shielding film, makes
The problem of standby process is to time and big power consumption.
The one side of the embodiment of the present invention provides a kind of electromagnetic shielding film 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 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 electromagnetic shielding film.
Optionally, the conductive layer also includes epoxy resin, the viscosity for increasing the conductive layer.
Optionally, the metallic is the combination particle of two or more metal formation.
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 electromagnetic shielding film also includes insulating barrier, and the insulating barrier is arranged on the conductive layer, Huo Zheshe
It is placed 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 electromagnetic shielding film also includes second metal layer, and the second metal layer is arranged at the conductive layer
On, 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 a kind of electromagnetic shielding film for cable, electromagnetic shielding film including the first metal layer, conductive layer with
And diaphragm；The first metal layer is covered in the outer upper of the conductor of cable, for shielding electromagnetic interference and as medium；Conductive layer
It is arranged on the first metal layer, for shielding electromagnetic interference, conductive layer includes curing agent, metallic and for bearing metal
The polyurethane of particle；Diaphragm is arranged on conductive layer, for providing protection to electromagnetic shielding film.Due to the pliability of polyurethane
More outstanding than resin, being fabricated to has splendid flexibility and toughness after electromagnetic shielding film, can reach and bag is wound on electric wire
To the requirement of the degree of packing when covering；In addition, polyurethane is after solution coating is fabricated to, hardening time is short, and solidification temperature is low, typically exists
2 days, the solidification room progress less than 80 DEG C, save time and electric energy, improve producing efficiency, reduce production cost.
Brief description of the drawings
Fig. 1 is a structural representation of the present invention for the electromagnetic shielding film of cable；
Fig. 2 is another structural representation of the present invention for the electromagnetic shielding film of cable；
Fig. 3 is another structural representation of the present invention for the electromagnetic shielding film of cable；
Fig. 4 is another structural representation of the present invention for the electromagnetic shielding film of cable；
Fig. 5 is the radial section schematic diagram of the wire rod of the electromagnetic shielding film production using the present invention；
Fig. 6 is one embodiment schematic diagram of the present invention for the manufacture method of the electromagnetic shielding film of cable；
Fig. 7 is manufacture method one embodiment schematic diagram of wire rod of the present invention；
Fig. 8 is another embodiment schematic diagram of the manufacture method of wire rod of the present invention；
Fig. 9 is the technical process schematic diagram for manufacturing wire rod in the prior art；
Figure 10 is the technical process schematic diagram of present invention manufacture wire rod；
Figure 11 is the performance test figure of the HDMI wire material of the screened film using the embodiment of the present invention；
Figure 12 is the eye pattern of the HDMI wire material of the screened film using the embodiment of the present invention；
Figure 13 is the performance test figure of six class netting twines of the screened film using the embodiment of the present invention.
Embodiment
The embodiments of the invention provide a kind of electromagnetic shielding film for cable, the shielding processing in cable is enabled to
When, it is only necessary to once coat with regard to shielding problem can be solved, and with 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, should all belong to the model that the present invention is protected
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 is so used can be exchanged 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
Covering is non-exclusive to be included, for example, containing process, method, system, product or the equipment of series of steps or unit need not limit
In those steps or unit for clearly listing, but may include not list clearly or for these processes, method, production
Product or the intrinsic other steps of equipment or unit.
Prior art is typically employed in wheat and draws the mode of the enterprising row metal braiding of aluminium foil 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, increases production cost, adds 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 just can add electro-magnetic screen layer without braiding layer to wire rod again
Electromagnetic shielding film, by the process of the multiple cladding braiding of existing needs be changed into only needing once coating screened film can reach it is same or
More preferable effect, greatly reduces the consumption of raw material, reduces production cost, improves production efficiency, additionally due to without plating etc.
Process, reduces pollution on the environment.Such electromagnetic shielding film is multi-layer film structure, plays pass to electromagnetic shielding in the structure
Key effect is conductive layer, and conductive layer is typically the hybrid resin composition using metallic and bearing metal particle.
But, the conductive layer in electromagnetic shielding film is made using resin and exposes following shortcomings：The pliability of resin
Deficiency, is fabricated to after conductive layer and easily produce fracture situation；After coating, hardening time is long for the solution that resin makes, and typically needs
Take 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 metallic
When, consolidation is coated, easily causing between metallic and particle can not contact problems, it is therefore desirable to increase the use of metallic
Amount, but after metallic increase, easily cause production puzzlement when metallic excessively influences to make product, metallic
Too much, in the coating of conductive layer, layer on surface of metal easily produces cut influence outward appearance, and the increase of metallic is also directly affected
Production cost, causes production cost to rise 10%-30%.
To solve the above problems, the present invention provides a kind of electromagnetic shielding film for cable, for ease of understanding, refers to figure
1, Fig. 1 is the structural representation of the electromagnetic shielding film for cable of the embodiment of the present invention, and electromagnetic shielding film 1 includes 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 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 electromagnetic shielding film 1.
It should be noted that the first metal layer 11 can be used as the medium for aiding in power delivery and/or signal transmission in cable.
As can be seen that electromagnetic shielding film 1 is really formed by stacking by three-decker, the electromagnetic shielding film 1 eventually formed exists
Seem it is still a film structure in appearance, shielded according to the banding that application demand can be cut to various different in width
Film, to be adapted to the wire rod of different demands.
Polyurethane (polyesters and polyethers), polyurethane elastomer is a kind 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, and being fabricated to has splendid flexibility and toughness, energy after electromagnetic shielding film
Enough realize the requirement on electric wire during voluble wrapping to the degree of packing；
2nd, polyurethane is after solution coating is fabricated to, and 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 being compared with resin, it is possible to reduce metallic quantity and reach same effect during with mixed with resin, same
Condition requirement when, using polyurethane can than using resin reduction 5-15% metallic quantity, while reducing cost；
4th, using the conductive layer of polyurethane, easily it is coated with production, the situation of bad order after production, drop is not easily caused
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 is acted on, and content in the conductive layer can be 10%-30%.
It can be seen that, electromagnetic shielding film of the invention is enabled in the shielding processing of cable, it is only necessary to once coated with regard to energy
Shielding problem is solved, also, because the pliability of polyurethane is more outstanding than resin, being fabricated to has splendid softness after electromagnetic shielding film
Property and toughness, requirement when can reach the voluble wrapping on electric wire to the degree of packing；In addition, polyurethane is being fabricated to solution
After 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 time and electric energy, carries
High producing efficiency, 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 the wire rod according to different-diameter depending on, gauge or diameter of wire is bigger, can choose the larger the first metal layer 11 of thickness, line
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 constitutes.It may be appreciated
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 from the stronger metal of electric conductivity choose, such as selection gold, silver, copper, nickel and
One kind among aluminium, can also use at least two alloy among this several metal certainly.
Conductive layer 12 can be the conductive metallic of side's property such as to include, because the metallic for waiting side's property conduction is full side
Position conducting, its performance is also easier adjustment, and conduction property is improved easily by increase metallic quantity.
Or, conductive layer 12 can also be to include the conductive metallic of anisotropy, and the conductive metallic of anisotropy exists
Conductive effect in polyurethane is longitudinal direction conducting, is laterally not turned on, i.e., be conducting in the direction perpendicular to 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 conductive metallic cost ratio of anisotropy 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 is all turned 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 be to be used to fix metallic, is on the other hand also 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 is differed, and
The size of metallic is that the metallic of same volume fraction in essentially identical size, therefore conductive layer 12 accounts for conductive layer
12 quality ratio is different, and the big metallic of density can take can be taken under same volume more.The second is due to
The demand of the performance of electromagnetic shielding is differed, such as 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, therefore, and 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 make it that the flexibility of wire rod in itself becomes 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 braiding, and use the electromagnetic membrane of this programme, because thickness is very thin, be also in itself
Flexible material, will not be impacted to the flexibility of wire rod.
It is preferred that, the thickness of conductive layer 12 is 3 microns to 50 microns.It should be noted that the thickness of influence conductive layer 12
Mainly there are two kinds of factors, one is the diameter of the wire rod of cladding is different, thickness is differed, such as, for thinner wire rod, led
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 have bigger cross-sectional area using the larger conductive layer 12 of thickness, thick conductive layer 12, from
Relative and electric conductivity is also stronger, smaller and higher to the wire rod softness requirements wire rod of electric conductivity demand then can select
The less conductive layer 12 of thickness ratio, adjusts with specific reference to actual conditions, does not limit.
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, can choose the stronger metallic of conductive capability, can accomplish in gold
Identical electric conductivity is reached in the case that the ratio of category mass particle is relatively small；Such as choose the stronger gold, silver of conductive capability,
One kind among copper, nickel and aluminium, certainly, it is that conductive capability is strong for outer layer that can also use another mode, i.e. metallic
The coat of metal, internal layer needs 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, it can reach and be better than the metallic that the metal selected completely using internal layer is made, specific choose can
Depending on the limitation of production cost and the requirement of the wire rod of production.
It is preferred that, the metallic in conductive layer 12 can also all or partly be two or more metal shape
Into combination particle, such as gold and silver combination particle, using combine particle as the metallic in conductive layer 12, production can be widened
Product overcome the limitation of single metallic electromagnetic shielding to shielding electromagnetic waves frequency range.
It is preferred that, epoxy resin can also be included in conductive layer 12.In above-mentioned electromagnetic shielding film, metallic is in conduction
The ratio of quality in layer 12 is generally 10% -80%.When the ratio of quality of the metallic in conductive layer 12 is excessive,
Metallic can influence the viscosity of polyurethane, cause the bonding between product structure layer not enough, now can be in conductive layer 12
The appropriate epoxy resin that adds improves polyurethane because adding the not enough problem of the viscosity after metallic.It should be understood 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 adjustment viscosity
, when metallic quantity does not interfere with the viscosity of polyurethane in polyurethane, epoxy resin can be not added with.Except using ring
Oxygen tree fat increases viscosity to polyurethane, polyurethane can also be modified using acrylate etc., to increase its viscosity.
It is preferred that, 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%.
Diaphragm 13 is used to protect electromagnetic shielding film 1, therefore typically from wear-resisting, waterproof, with certain electric insulating quality
Can engineering films, such as polyethylene terephtalate film, either polyimides PI films or polyvinyl chloride
PVC film, either polypropylene PP film or polyethylene PE film, either ethylene-vinyl acetate copolymer eva film or
Polycarbonate film, either methyl methacrylate MMA films or cast polypropylene film CPP films, or propylene
Nitrile-BS ABS films, or polyamide PA films etc..It is preferred that, the second diaphragm 25 can be selected
PET film.PET material has advantages below：1. electrical insulation capability is good；2. heat distortion temperature and long-term temperature in use are thermoplasticity
Highest in general engineering plastic；2. because heat-resisting height, REINFORCED PET impregnates 10S in 250 DEG C of solder bath, hardly deformed
Also nondiscolouring, is particularly suitable for preparing electronics, the electric parts of soldering；3. bending strength is high, elastic modelling quantity is high, creep resistance and fatigue
Property also very well, case hardness is high, and mechanical performance is close with thermosetting plastics；4. by production PET institute's spent glycols are than production PBT
The price of butanediol used almost cheap half, so PET resin and REINFORCED PET are that price is most rational in engineering plastics, tool
There is very high cost performance.Optionally, the thickness of diaphragm 13 can be 5 microns to 50 microns.
The diaphragm 13 that the present invention is provided is provided beyond protection to electromagnetic shielding film 1, also with certain insulating properties,
Therefore the electromagnetic shielding film 1 that the present invention is provided is in the case where disclosure satisfy that the demand to the less demanding cable of insulating properties, energy
Cost is enough reduced, reduces the diameter of the cable after cladding electromagnetic shielding film 1.
In actual use, electromagnetic shielding film 1 can also set insulating barrier on conductive layer 12 or on diaphragm 13, please
Refering to Fig. 2, Fig. 2 is another structural representation of the electromagnetic shielding film for cable of the embodiment of the present invention, and electromagnetic shielding film 2 is wrapped
Include 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 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 being carried to electromagnetic shielding film 2
For protection.
Embodiment corresponding with Fig. 1 is compared, and increases insulating barrier 24 in the embodiment of the present invention, it is possible to increase electromagnetic shielding film 2
Insulating properties, internal electromagnetism leaked wave can be completely cut off, while stopping interference of the external electromagnetic waves to electric wire.When electric wire electricity
When cable is used for high-frequency high-speed transmission conditions, increase this insulating barrier 24 in electromagnetic shielding film to strengthen protection, when electric wire is used
When the transmission of general condition, it may not be necessary to insulating barrier 24, the production cost of electromagnetic shielding film can be reduced.
It is preferred that, 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, reduces 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..
It is preferred that, insulating barrier 24 can also include filler, and for reinforced insulation layer to the filtering function of 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 of electromagnetic shielding film 2, strengthen electromagnetic shielding film
The protection of 2 pairs of cables.
It is preferred that, 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 electromagnetic shielding film is mainly to provide protection, resist
Abrasion, waterproof, insulation etc., therefore diaphragm 23 and insulating barrier 24 are arranged at the outermost layer of electromagnetic shielding film, that is to say, that distance
Cable conductors are farthest.But, the relative position of diaphragm 23 and insulating barrier 24 therebetween is not limited, that is to say, that insulation
Layer 24 can also be arranged on diaphragm 23, positioned at the outermost layer of electromagnetic shielding film.
On the first metal layer 21 in electromagnetic shielding film in the embodiment of the present invention 2, conductive layer 22 and diaphragm 23, it please join
See the first metal layer 11, conductive layer 12 and the protective layer 13 in the corresponding embodiments of Fig. 1 in electromagnetic shielding film 1, no longer go to live in the household of one's in-laws on getting married herein
State.
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 electromagnetic shielding film of cable, electromagnetic shielding film 3 includes the first metal layer 31, conductive layer 32, protected
Cuticula 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 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 electromagnetic shielding film.
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 is determined 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.Such as, the metal level of plating can be fabricated to 0.1um -3um, can reduce the thickness of product, and metal level uses film material
During material, the metallic film of current market sale is in more than 7um, and when requiring metallic film in more than 7um, price can be on multiple
Rise, influence production cost.
On the first metal layer 31 in electromagnetic shielding film in the embodiment of the present invention 3, conductive layer 32 and diaphragm 33, it please join
See the first metal layer 11, conductive layer 12 and the protective layer 13 in the corresponding embodiments of Fig. 1 in electromagnetic shielding film 1, no longer go to live in the household of one's in-laws on getting married herein
State.
With reference to the corresponding embodiments of Fig. 2 and Fig. 3, referring to Fig. 4, Fig. 4 is the electromagnetism for cable of the embodiment of the present invention
Another structural representation of screened film, electromagnetic shielding film 4 includes the first metal layer 41, conductive layer 42, diaphragm 43, the 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 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 electromagnetism
Screened film provides protection.
On the first metal layer 41 in electromagnetic shielding film in the embodiment of the present invention 4, conductive layer 42 and diaphragm 43, it please join
See the first metal layer 11, conductive layer 12 and the protective layer 13 in the corresponding embodiments of Fig. 1 in electromagnetic shielding film 1, the present invention is implemented
Insulating barrier 45 in example in electromagnetic shielding film 4, refers to the insulating barrier 24 in electromagnetic shielding film 2 in the corresponding embodiments of Fig. 2, this
Second metal layer 44 in inventive embodiments in electromagnetic shielding film 4, is referred in the corresponding embodiments of Fig. 3 in electromagnetic shielding film 3
Second metal layer 34, here is omitted.
It should be noted that the effect of diaphragm 43 and insulating barrier 45 in electromagnetic shielding film 4 is mainly to provide protection, resist
Abrasion, waterproof, insulation etc., therefore diaphragm 43 and insulating barrier 45 are arranged at the outermost layer of electromagnetic shielding film 4, that is to say, that away from
It is farthest from cable conductors.But, the relative position of diaphragm 43 and insulating barrier 45 therebetween is not limited, that is to say, that absolutely
Edge layer 45 can also be arranged on diaphragm 43, positioned at the outermost layer of electromagnetic shielding film.Especially, in the market can be adopted directly
Buy diaphragm 43 and the material completed is combined with second metal layer 44, therefore, directly using diaphragm 43 and second metal layer 44
Electromagnetic shielding film 4 is made with reference to the material of completion, then insulating barrier 45 is coated on diaphragm 43, it is possible to reduce production process,
Improve production efficiency.
Electromagnetic shielding film 1, electromagnetic shielding film 2, electromagnetic shielding film 3 and the electromagnetic shielding film 4 of the embodiment of the present invention can
It is widely used in the electric wire that all kinds of needs in terms of electric power, communication and signal transmission are shielded.
As shown in figure 5, be using the embodiment of the present invention electromagnetic shielding film 1 produce wire rod longitudinal section view, its by
Be followed successively by conductor 51 from inside to outside, it is outer by 521, the first metal layer 11, conductive layer 12, diaphragm 13 and outer by 522, wherein the first gold medal
Belong to the part that layer 11, conductive layer 12 and diaphragm 13 are electromagnetic shielding film 1.As can be seen that relative to prior art repeatedly
Cover wheat and draw aluminium foil and wire sheathing, production cost and the equipment investment of wire rod can be greatly reduced, and substantially reduce line
Material production is due to plating pollution on the environment.Using the embodiment of the present invention electromagnetic shielding film 2 or electromagnetic shielding film 3 or
Each layer is in the distribution situation of radial direction in the wire rod that person's electromagnetic shielding film 4 is produced, and those skilled in the art are easily real according to Fig. 5
Apply example to draw, here is omitted.
The electromagnetic shielding film of the embodiment of the present invention is described above, below to the electromagnetic shielding of the embodiment of the present invention
The manufacture method of film is introduced, by taking the manufacture method of the corresponding electromagnetic shielding films 1 of Fig. 1 as an example, referring to Fig. 6, Fig. 6 is this hair
One embodiment figure of the manufacture method of the electromagnetic shielding film for cable of bright embodiment, the manufacture method may include：
601st, the outer by upper the first metal layer of conductor for being covered in cable is generated；
Wherein, the demand of the wire rod that can be applied according to specific needs first generates the first metal layer of demand thickness, and this
One metal level can be used as shielding for the first time.
It should be noted that when generating the first metal layer, a laminar substrate being set under the first metal layer in advance, is made
The first metal layer is generated on the substrate, so that the higher the first metal layer of quality is obtained, while the substrate and the first metal layer
Between be easy to depart from, the generation of such as the first metal layer uses founding, is then molded into the mode of demand thickness.
602nd, coating includes the conductive layer of metallic, polyurethane and curing agent on the first metal layer；
Wherein, after the first metal layer completes, can be generated by way of coating comprising metallic, polyurethane and
Metallic in the conductive layer of curing agent, conductive layer for wait side's property conductive or anisotropy conduction metallic, the conduction
Depending on the thickness of layer is by the demand of wire rod.
It should be noted that by the way of coating, enabling to the conductive layer containing metallic and polyurethane formation equal
Even is distributed on metal level, so that the quality of the conductive layer not only formed is higher, and formed the efficiency of conductive layer also compared with
It is high.
603rd, spray or press on the electrically conductive diaphragm.
After the making of conductive layer is completed, so that it may by way of spraying on conductive layer, according to specific needs should
The demand of wire rod generates the diaphragm of demand thickness, or can also press the diaphragm of pre-generatmg on the electrically conductive.Protect
Cuticula can be engineering films, such as polyethylene terephtalate film, or polyimides PI films, Huo Zheju
Vinyl chloride PVC film, either polypropylene PP film or polyethylene PE film, or ethylene-vinyl acetate copolymer EVA are thin
Film, either polycarbonate film or methyl methacrylate MMA films, or cast polypropylene film CPP films, or
Person's acrylonitrile-butadiene-styrene copolymer ABS films, or polyamide PA films etc..
As can be seen here, using the manufacture method of the embodiment of the present invention, the need for the wire rod that can be applied according to specific needs first
The first metal layer of demand thickness is sought survival into, the first metal layer can be used as shielding for the first time, evaporation or the side being coated with can be passed through
Conductive layer covering comprising metallic, polyurethane and curing agent on the first metal layer, is completed the making of conductive layer by formula
Afterwards, so that it may diaphragm is generated on conductive layer by way of spraying or pressing, so as to produce thickness precisely, surface is equal
Even high-quality electromagnetic shielding film.
It should be noted that in actual production process, can also be generated in the opposite mode of embodiment corresponding with Fig. 6
Electromagnetic shielding film, i.e., first generate diaphragm, afterwards using diaphragm as carrier, conductive layer is coated on above diaphragm, Ran Hou
The first metal layer is generated on conductive layer.
The manufacture method to the electromagnetic shielding film for cable of the embodiment of the present invention is described above, below to this
The manufacture method of the wire rod of inventive embodiments is introduced.
Referring to Fig. 7, Fig. 7 is one embodiment schematic diagram of the manufacture method of the wire rod of the embodiment of the present invention, the present invention
The manufacture method for the wire rod that embodiment is provided may include：
701st, the conductor for power delivery and/or signal transmission is generated；
Wherein, when making cable, the conductor for power delivery and/or signal transmission is firstly generated.
It should be noted that the conductor can be for the conductor of power delivery or leading for signal transmission
Body or the simultaneously conductor for power delivery and signal transmission.
702nd, the outer quilt for insulating and protecting is covered on the outer surface of conductor；
After the conductor that completes, it can be covered on the outer surface of conductor for quilt outside the conductor that insulate and protect.
703rd, in the outer by the upper electromagnetic shielding film for winding or coating banding of conductor；
After covering the outer quilt for insulating and protecting on the outer surface of conductor, can conductor it is outer by upper winding or
The electromagnetic shielding film of banding is coated, the electromagnetic shielding film is Fig. 1, Fig. 2, Fig. 3 or the electromagnetic shielding film of embodiment illustrated in fig. 4.
After the completion of being produced outside conductor, as shown in figure 8, the outer by 521 of conductor 51 can be wound or be coated on by the electromagnetic shielding film 1 of banding
On.
It is preferred that, can be in the outer by upper use wheat drawing aluminium of conductor in order to utilize existing production equipment in the prior art
Paper tinsel wrapping machine winds or coats electromagnetic shielding film using coating machine.Because the screened film in the embodiment of the present invention is the knot of banding
Structure, and wheat is drawn in the structure that aluminium foil is also banding in itself, therefore the manufacture method of the wire rod of the invention implemented, and can use existing skill
Wheat in the manufacture method of the wire rod of art draws the equipment of aluminium foil wrapping machine or coating machine as winding or coating screened film, so as to
It is enough to produce identical or even more excellent quality product in the case where reducing the production equipment of prior art, and due to metal
Braiding layer production needs to use special equipment, and the equipment to add cost higher, thus, the wire rod of the embodiment of the present invention
Manufacture method when mass producing wire rod, the production cost of wire rod can be substantially reduced, simultaneously because without wire sheathing,
So as to produce the metal material of braiding without progress, so that while largely saving raw material, additionally it is possible to eliminate to environment
Pollution.
704th, cover on an electro-magnetic shielding film for quilt outside the wire rod that insulate and protect.
After electromagnetic shielding film winds or is covered to complete, the wire rod for insulating and protecting can be covered on an electro-magnetic shielding film
Outer quilt, the outer wire rod is present as the outermost diaphragm of wire rod.
It should be noted that in actual applications, this step can not also be performed, i.e., it can not also be covered on the electromagnetic shielding film
The outer quilt of lid wire rod, whether wire rod is outer is needed covering depending on the protection demand of cable, and such as part electric wire does not have too with cable
When crossing harsh protection demand, the outer quilt of wire rod can not be covered and the diaphragm in electromagnetic shielding film is directly used as wire rod
Diaphragm, for example for inside equipment have equipment shell protect wire rod, then such as some cables or electric wire be used for family
Outer or relatively more severe situation, now needs the outer quilt of covering wire rod, on the one hand as diaphragm, another aspect reinforced insulation
Energy.
Referring to Fig. 9, the specific embodiment to manufacture wire rod using weaving method, Figure 10 is present invention manufacture wire rod
Specific embodiment.As can be seen that making side of the manufacture method of the wire rod of the embodiment of the present invention relative to existing weave yarn
The difference of method is that the winding wheat of prior art coats wire sheathing after drawing aluminium foil and winding, and may repeatedly be wrapped
Cover braiding step, and embodiment of the present invention scheme is only with step 703, i.e., by upper winding or the shielding of cladding banding outside conductor
Film can complete corresponding numerous and diverse step in the prior art, and the production efficiency of wire rod is greatly improved, and due to having lacked metal volume
Tissue layer, it is environmentally safe without complicated braiding process, and without plating.A Tai Maila aluminium foils are twined in the prior art
Around or coating machine need be equipped with tens braiders to hundreds of braided metal braiding layers, equipment cost is high, and equipment is too
Many space-consumings are too big, and use embodiment of the present invention scheme, due to that need not weave process, thus equipment cost expenditure significantly
Reduce, and the space-consuming of equipment is also greatly reduced.
Here is that the performance for the wire rod produced using the screened film of the embodiment of the present invention and the manufacture method of wire rod is surveyed
Try example.
For example, the test of the HDMI wire material for the screened film using the embodiment of the present invention, refers to Figure 11 and Figure 12, scheme
11 be the performance test figure of the HDMI wire material of the screened film using the embodiment of the present invention, wherein, CLK, D0, D1 and D2 are by surveying
Examination, Figure 12 is the eye pattern of the HDMI wire material of the screened film using the embodiment of the present invention, and the HDMI wire material is the mark using HDMI1.4
What standard was made, but the line of the standards of HDMI 1.4 for the screened film for using the embodiment of the present invention is can be seen that from the eye pattern
Material can easily pass through the test of HDMI2.0 standards.
Again for example, the test of the six class netting twines for the screened film using the embodiment of the present invention, refers to Figure 13, Tu13Shi
Using the performance test figure of six class netting twines of the screened film of the embodiment of the present invention, it can be seen that real using the present invention from the Figure 13
Corresponding test can be easily passed through by applying six class netting twines of the screened film of example.
In addition to the test of above-mentioned classification, all kinds of wire rods using the shielding film production of the embodiment of the present invention also have a lot, and
And the test of the standard of corresponding wire rod can be easily passed through, as space is limited, it will not enumerate.Can be with from above-mentioned test data
Find out, the screened film of the embodiment of the present invention is due to its high-quality and inexpensive characteristic, with wide market prospects.
In described several embodiments, it should be understood that disclosed system, apparatus and method can pass through others
Mode is realized.For example, device embodiment described above is only schematical, for example, the division of unit, is only one kind
Division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or can
To be integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or discussed each other
Coupling direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of device or unit,
Can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be physically separate, be shown as unit
Part can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple networks
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If integrated unit is realized using in the form of SFU software functional unit and is used as independent production marketing or in use, can
To be stored in a computer read/write memory medium.Based on it is such understand, technical scheme substantially or
Saying all or part of the part contributed to prior art or the technical scheme can be embodied in the form of software product
Out, the computer software product is stored in a storage medium, including some instructions are to cause a computer equipment
(can be personal computer, server, or network equipment etc.) performs all or part of each embodiment method of the invention
Step.And foregoing storage medium includes：It is USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), random
Access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with Jie of store program codes
Matter.
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 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 electromagnetic shielding film for cable, it is characterised in that the electromagnetic shielding film 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 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 electromagnetic shielding film.
2. the electromagnetic shielding film according to claim 1 for cable, it is characterised in that the conductive layer also includes epoxy
Resin, the viscosity for increasing the conductive layer.
3. the electromagnetic shielding film according to claim 1 for cable, it is characterised in that the metallic be two kinds or
The combination particle of two or more metal formation.
4. the electromagnetic shielding film according to claim 1 for cable, it is characterised in that the diaphragm is that engineering is thin
Film.
5. the electromagnetic shielding film according to claim 1 for cable, it is characterised in that the metallic accounts for described lead
The ratio of the quality of electric layer is 10% -80%.
6. the electromagnetic shielding film according to any one of claim 1 to 5 for cable, it is characterised in that the electromagnetism
Screened film also includes insulating barrier, and the insulating barrier is arranged on the conductive layer, or is arranged on the diaphragm.
7. the electromagnetic shielding film according to claim 6 for cable, it is characterised in that the insulating barrier includes polyurethane
And coloring pigment.
8. the electromagnetic shielding film according to claim 7 for cable, it is characterised in that the insulating barrier also includes filling out
Material, 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 electromagnetic shielding film according to claim 7 for cable, it is characterised in that the insulating barrier also includes fire-retardant
Agent.
10. the electromagnetic shielding film according to claim 6 for cable, it is characterised in that the electromagnetic shielding film is also wrapped
Second metal layer is included, the second metal layer is arranged on the conductive layer, for coordinating the conductive layer to be shielded.
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| CN201710295654.5A CN106952678B (en) | 2017-04-28 | 2017-04-28 | A kind of electromagnetic shielding film for cable |
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| CN107333462A (en) * | 2017-08-16 | 2017-11-07 | 苏州城邦达力材料科技有限公司 | The processing method of conductive layer, electromagnetic shielding film and electromagnetic shielding film |
| CN108366517A (en) * | 2018-01-26 | 2018-08-03 | 安徽建筑大学 | Wrapping type electromagnetic shielding film for optical cable |
| WO2018195922A1 (en) * | 2017-04-28 | 2018-11-01 | 南昌联能科技有限公司 | Electromagnetic shielding film for cable |
| WO2021012329A1 (en) * | 2019-07-22 | 2021-01-28 | 南昌联能科技有限公司 | Method for connecting cable to connector, and cable connected to connector |
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| CN106531311A (en) * | 2016-12-26 | 2017-03-22 | 南昌联能科技有限公司 | Electromagnetic shielding film for cable, manufacturing method for electromagnetic shielding film and manufacturing method for wire rod |
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| JPH10145080A (en) * | 1996-11-08 | 1998-05-29 | Nitto Denko Corp | Electromagnetic shield tape and electromagentically shielded wire |
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| WO2018195922A1 (en) * | 2017-04-28 | 2018-11-01 | 南昌联能科技有限公司 | Electromagnetic shielding film for cable |
| US10856457B2 (en) | 2017-04-28 | 2020-12-01 | Nanchang Unitetec Technology Co., Ltd. | Electromagnetic shielding film for cable |
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| EP4006923A4 (en) * | 2019-07-22 | 2023-07-19 | Nanchang Unitetec Technology Co., Ltd. | Method for connecting cable to connector, and cable connected to connector |
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| CN106952678B (en) | 2019-05-10 |
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