CN107578846A - A kind of cable with electromagnetic shielding - Google Patents

Abstract

The embodiment of the invention discloses a kind of cable with electromagnetic shielding, it is related to wire rod manufacturing field, is easily broken off for solving existing electromagnetic shielding film, the problem of preparation process is to time and big power consumption.The electromagnetic shielding film that the present invention is used for 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 electromagnetic shielding film.

Description

A kind of cable with electromagnetic shielding

Technical field

The present invention relates to wire rod manufacturing field, and in particular to a kind of cable with electromagnetic shielding.

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.

A kind of to solve the above problems, existing electromagnetic shielding that can add electro-magnetic screen layer to wire rod without braiding layer 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 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.Such electromagnetic shielding film is multi-layer film structure, and electromagnetic shielding is played a key effect 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 electromagnetic shielding film exposes shortcomings, for example, resin pliability not Foot, it is fabricated to after conductive layer and easily produces fracture situation, for example the solution that resin makes is after coating, hardening time length, typically 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 cable with electromagnetic shielding, is easily broken off for solving existing electromagnetic shielding film, prepares The problem of process is to time and big power consumption.

The one side of the embodiment of the present invention provides a kind of cable with electromagnetic shielding, including electro-magnetic screen layer, described Electro-magnetic screen layer is the electromagnetic shielding film for the outer quilt for being arranged at conductor, electromagnetic shielding film, 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 electromagnetic shielding film.

Optionally, the first metal layer is the alloy of single metal or various metals, the thickness of the first metal layer Degree is chosen as 3 microns to 50 microns.

Optionally, the conductive layer also includes epoxy resin, for increasing the viscosity of the conductive layer；And/or described lead Electric layer also includes fire retardant.

Optionally, the metallic is that side's property is conductive or anisotropy is conductive, and the metallic is two kinds or two kinds The combination particle that above metal is formed, the thickness for stating the first metal layer are chosen as 3 microns to 50 microns.

Optionally, the diaphragm is engineering films, and the thickness of the diaphragm is 5 microns to 50 microns.

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 Zhesuo Stating electromagnetic shielding film also includes insulating barrier, and the insulating barrier 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, the insulating barrier Also include 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：

Of the invention to provide a kind of cable with electromagnetic shielding, including electro-magnetic screen layer, the electro-magnetic screen layer is to set The electromagnetic shielding film of the outer quilt of conductor is placed in, electromagnetic shielding film includes the first metal layer, conductive layer and diaphragm；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 at the first metal layer On, for shielding electromagnetic interference, conductive layer includes curing agent, metallic and the polyurethane for bearing metal particle；Protect Cuticula is arranged on conductive layer, for providing protection to electromagnetic shielding film.Because the pliability of polyurethane is more outstanding than resin, make There are splendid flexibility and toughness after into electromagnetic shielding film, can reach and the degree of packing is wanted when being wrapped around on electric wire Ask；In addition, polyurethane, after solution coating is fabricated to, hardening time is short, solidification temperature is low, typically in 2 days, consolidating less than 80 DEG C Change room to carry out, save time and electric energy, improve producing efficiency, reduce production cost.

Brief description of the drawings

Fig. 1 is a structural representation of the electromagnetic shielding film for the cable that the present invention has electromagnetic shielding；

Fig. 2 is another structural representation of the electromagnetic shielding film for the cable that the present invention has electromagnetic shielding；

Fig. 3 is another structural representation of the electromagnetic shielding film for the cable that the present invention has electromagnetic shielding；

Fig. 4 is another structural representation of the electromagnetic shielding film for the cable that the present invention has electromagnetic shielding；

Fig. 5 is the radial cross section for the cable for having electromagnetic shielding using the present invention；

Fig. 6 is one embodiment schematic diagram of the manufacture method of electromagnetic shielding film of the present invention；

Fig. 7 is the manufacture method one embodiment schematic diagram for the cable that the present invention has electromagnetic shielding；

Fig. 8 is that the present invention has another embodiment schematic diagram of the manufacture method of cable of electromagnetic shielding；

Fig. 9 is the technical process schematic diagram of cable of the manufacture with electromagnetic shielding in the prior art；

Figure 10 is the technical process schematic diagram for the cable that the present invention has electromagnetic shielding；

Figure 11 is the performance test figure using the HDMI wire material of the screened film of the embodiment of the present invention；

Figure 12 is the eye pattern using the HDMI wire material of the screened film of the embodiment of the present invention；

Figure 13 is the performance test figure using six class netting twines of the screened film of the embodiment of the present invention.

Embodiment

The embodiments of the invention provide a kind of cable with electromagnetic shielding, enable in the shielding processing of cable, Only need once to 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 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 equally or More preferable effect, greatly reduce the consumption of raw material, reduce production cost, improve production efficiency, additionally due to without plating etc. Process, reduce pollution on the environment.Such electromagnetic shielding film is multi-layer film structure, and pass is played to electromagnetic shielding in the structure Key effect is conductive layer, and conductive layer is typically using the hybrid resin of metallic and bearing metal particle composition.

But the conductive layer in electromagnetic shielding film is made using resin and exposes following shortcomings：The pliability of resin Deficiency, it is fabricated to after conductive layer and easily produces fracture situation；The solution that resin makes after coating, hardening time length, 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 increases 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 also directly affects Production cost, production cost is caused to rise 10%-30%.

To solve the above problems, the present invention provides a kind of cable with electromagnetic shielding, for ease of understanding, referring to Fig. 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 11st, 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 electromagnetic shielding film 1.

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 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, the banding that various different in width can be cut to according to application demand shields Film, 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, has splendid flexibility and toughness, energy after being fabricated to electromagnetic shielding film Enough realize the requirement when being wrapped around on electric wire to the degree of packing；

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 electromagnetic shielding film of the invention is enabled in the shielding processing of cable, it is only necessary to is once coated with regard to energy Solve shielding problem, also, because the pliability of polyurethane is more outstanding than resin, have splendid softness after being fabricated to electromagnetic shielding film Property and toughness, can reach the requirement to the degree of packing when being wrapped around on electric wire；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 is saved time and electric energy, is carried High producing efficiency, reduce 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 electromagnetic membrane of this programme, and because thickness is very thin, itself is also Flexible material, 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 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 deficiency between product structure layer, now can be in conductive layer 12 The appropriate epoxy resin that adds improves polyurethane because adding the sticky insufficient problem 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, 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%.

Diaphragm 13 is used to protect electromagnetic shielding film 1, therefore typically selects wear-resisting, waterproof, has 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..Preferably, 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 use of temperature 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 it is non-discolouring, it is particularly suitable for preparing electronics, the electric parts of soldering；3. bending strength is high, modulus of elasticity is high, creep resistance and fatigue Property it is also fine, 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.

Diaphragm 13 provided by the invention is provided beyond protection to electromagnetic shielding film 1, also with certain insulating properties, Therefore electromagnetic shielding film 1 provided by the invention is in the case where disclosure satisfy that to the demand of 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 wraps 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 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 being carried to electromagnetic shielding film 2 For protection.

With Fig. 1 corresponding to embodiment compare, in the embodiment of the present invention increase insulating barrier 24, it is possible to increase electromagnetic shielding film 2 Insulating properties, internal electromagnetism leaked wave can be completely cut off, while stop 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 protecting, 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.

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 of electromagnetic shielding film 2, strengthen electromagnetic shielding film The protection of 2 pairs of cables.

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 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 does not limit, 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, please join See the first metal layer 11, conductive layer 12 and the protective layer 13 in embodiment corresponding to Fig. 1 in electromagnetic shielding film 1, it is no longer superfluous 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 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 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 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.

On the first metal layer 31 in electromagnetic shielding film in the embodiment of the present invention 3, conductive layer 32 and diaphragm 33, please join See the first metal layer 11, conductive layer 12 and the protective layer 13 in embodiment corresponding to Fig. 1 in electromagnetic shielding film 1, it is no longer superfluous herein State.

The embodiment with reference to corresponding to 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 include 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 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 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, please join See the first metal layer 11, conductive layer 12 and the protective layer 13 in embodiment corresponding to 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 embodiment corresponding to Fig. 2, this Second metal layer 44 in inventive embodiments in electromagnetic shielding film 4, refer in embodiment corresponding to 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 does not limit, 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 of electric power, communication and signal transmission etc. 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 Conductor 51 is followed successively by from inside to outside, be 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 electroplating pollution on the environment.Using the embodiment of the present invention electromagnetic shielding film 2 or electromagnetic shielding film 3 or For each layer in the distribution situation of radial direction, those skilled in the art are easily real according to Fig. 5 in the wire rod that person's electromagnetic shielding film 4 produces 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 electromagnetic shielding film corresponding to Fig. 11 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 the conductor for being covered in cable is generated；

Wherein, the first metal layer of the demand generation demand thickness for the wire rod that can be applied according to specific needs first, 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 can be set under the first metal layer in advance, made The first metal layer generates on the substrate, so as to obtain the higher the first metal layer of quality, while the substrate and the first metal layer Between be easy to depart from, such as the generation of 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 The conductive layer of curing agent, metallic in conductive layer is waits side's property conductive or the metallic of anisotropy conduction, 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, enable to the conductive layer containing metallic and polyurethane formation equal Even is distributed on metal level, so as to which the quality of 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 diaphragm of the demand generation demand thickness of wire rod, or the diaphragm of pre-generatmg can also be pressed 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, can be by the side that is deposited or is coated with 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 generate diaphragm on conductive layer by way of spraying or pressing, accurate so as to produce thickness, surface is equal The electromagnetic shielding film of even high quality.

It should be noted that in actual production process, can also by with Fig. 6 corresponding to embodiment it is opposite in a manner of generate Electromagnetic shielding film, i.e., diaphragm is first generated, 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 of 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 provides 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 conductor for being used for power delivery and signal transmission simultaneously.

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 the outer quilt for insulating and protecting is covered on the outer surface of conductor, can conductor it is outer by it is 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.

Preferably, in order to utilize existing production equipment in the prior art, aluminium can be drawn using wheat by upper in the outer of conductor Paper tinsel wrapping machine winds or using coating machine cladding electromagnetic shielding film.Because the screened film in the embodiment of the present invention is the knot of banding Structure, and wheat draws the structure that aluminium foil is also banding in itself, therefore in the manufacture method of the wire rod of the invention implemented, existing skill can be used 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., can not also be covered on the electromagnetic shielding film Quilt outside lid wire rod, whether wire rod is outer is needed protection demand of the covering depending on cable, as part electric wire and cable do not have too When crossing harsh protection demand, the outer quilt of wire rod can not be covered and directly use the diaphragm in electromagnetic shielding film as wire rod Diaphragm, such as the wire rod that equipment shell protects of having inside equipment, then such as some cables or electric wire are to be used for family Outer or more severe situation, now need to cover the outer quilt of wire rod, on the one hand as diaphragm, another aspect reinforced insulation Energy.

Referring to Fig. 9, to manufacture the specific embodiment of 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 draws aluminium foil and coats wire sheathing after winding, and may repeatedly be wrapped Cover braiding step, and scheme of the embodiment of the present invention 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 the braiding process of complexity, and without plating.A Tai Maila aluminium foils twine 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 More space-consumings are too big, and use scheme of the embodiment of the present invention, and due to that need not weave process, therefore the expenditure of equipment cost is 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 for the screened film for using the embodiment of the present invention, wherein, CLK, D0, D1 and D2 pass through survey Examination, Figure 12 are using the eye pattern of the HDMI wire material of the screened film of 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 using the screened film of 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.

In another 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 It is from the Figure 13 it can be seen that real using the present invention using the performance test figure of six class netting twines of the screened film of the embodiment of the present invention 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 are also a lot, and And the test of the standard of wire rod corresponding to easily passing 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 has wide market prospects due to its high quality and the characteristic of low cost.

In described several embodiments, it should be understood that disclosed system, apparatus and method, others can be passed through 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 an 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.Another, shown or discussed is mutual Coupling direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of device or unit, Can be electrical, mechanical 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 present 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, can also be realized in the form of SFU software functional unit.

If integrated unit is realized 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 such understanding, technical scheme substantially or Saying all or part of the part to be 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 causing a computer equipment (can be personal computer, server, or network equipment etc.) performs all or part of each embodiment method of the present 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 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 cable with electromagnetic shielding, including electro-magnetic screen layer, the electro-magnetic screen layer are the outer quilt for being arranged at conductor Electromagnetic shielding film, 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 conductor, 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 electromagnetic shielding film.

2. the cable with electromagnetic shielding according to claim 1, it is characterised in that the first metal layer is single gold The alloy of category or various metals, the thickness of the first metal layer are chosen as 3 microns to 50 microns.

3. the cable with electromagnetic shielding according to claim 1, it is characterised in that the conductive layer also includes asphalt mixtures modified by epoxy resin Fat, for increasing the viscosity of the conductive layer；And/or the conductive layer also includes fire retardant.

4. the cable with electromagnetic shielding according to claim 1, it is characterised in that the metallic is that side's property is conductive Or anisotropy is conductive, the metallic is the combination particle that two or more metal is formed, and states the first metal layer Thickness is chosen as 3 microns to 50 microns.

5. the cable with electromagnetic shielding according to claim 1, it is characterised in that the diaphragm is engineering films, The thickness of the diaphragm is 5 microns to 50 microns.

6. the cable with electromagnetic shielding according to claim 1, it is characterised in that the metallic accounts for the conduction The ratio of the quality of layer is 10% -80%.

7. the cable with electromagnetic shielding according to any one of claim 1 to 5, it is characterised in that the electromagnetic screen Covering film also includes insulating barrier, and the insulating barrier is arranged on the conductive layer；Or the electromagnetic shielding film also includes insulating barrier, The insulating barrier is arranged on the diaphragm.

8. it is according to claim 7 have electromagnetic shielding cable, it is characterised in that the insulating barrier include polyurethane and Coloring pigment.

9. the cable with electromagnetic shielding according to claim 7, 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；Or the insulating barrier Also include fire retardant.

10. the cable with electromagnetic shielding according to claim 1, it is characterised in that the electromagnetic shielding film also includes Second metal layer, the second metal layer are arranged on the conductive layer, for coordinating the conductive layer to be shielded.