CN109587981A

CN109587981A - Multi-functional composite sheet with electromagnetic wave control, heat dissipation and impact absorbing function

Info

Publication number: CN109587981A
Application number: CN201811145630.2A
Authority: CN
Inventors: 朴�钟; 朴钟一; 金艺娜; 朴锺睍; 郑惺宪; 柳锺虎; 李愚择
Original assignee: Iljin Materials Co Ltd
Current assignee: Iljin Materials Co Ltd
Priority date: 2017-09-29
Filing date: 2018-09-29
Publication date: 2019-04-05
Also published as: KR101922938B1

Abstract

The disclosure provides a kind of multi-functional composite sheet with electromagnetic wave control, heat dissipation and impact absorbing function, and the multi-functional composite sheet has the function of electromagnetic wave shielding, heat sinking function and impact absorbing function, wherein the multi-functional composite sheet includes: impact absorbing layer；Metal foil layer is arranged on the impact absorbing layer；First electromagnetic wave control layer is arranged on the metal foil layer；Graphite linings are arranged on the first electromagnetic wave control layer；Second electromagnetic wave control layer is arranged in the graphite linings；Nonconductive adhesive layer is arranged on the second electromagnetic wave control layer；And release film layer, it is arranged in the nonconductive adhesive layer, wherein the overall thickness of the multi-functional composite sheet is 50 μm to 250 μm, the electromagnetic shielding effectiveness of the multi-functional composite sheet is 60dB to 120dB, and the thermal conductivity of the multi-functional composite sheet is 250W/mK to 700W/mK.

Description

Multi-functional composite sheet with electromagnetic wave control, heat dissipation and impact absorbing function

Technical field

This disclosure relates to a kind of multi-functional composite sheet, the multi-functional composite sheet has electromagnetic wave control function, heat dissipation function It can be functional with the institute in impact absorbing function.More specifically, this disclosure relates to such a multi-functional composite sheet, more function Energy composite sheet can be applied to the electronic device of miniaturization, slimming, while show improved electromagnetic wave control function, heat dissipation Function and impact absorbing function.

Background technique

In recent years, with the miniaturization of electronic device, slimming and multifunction, electronic component and electronic device it is integrated Degree has improved.In addition, the amount of the heat generated by the electronic component of electrical energy drive also substantially increases.Because being generated by electronic component Heat localization in electronic component and reduce the service life of electronic device.For this reason, to the demand of heat dissipation performance Constantly increase, the heat dissipation performance be effectively dissipated and the heat generated in electronic device is discharged.In addition, with the collection of electronic component It is improved at degree, the electromagnetic wave of generation also increases.Electromagnetic wave may be leaked by the joint between connecting element it is external or Lead to the failure of another electronic component.In severe cases, it was reported that electromagnetic-wave leakage will cause such as weakening human immunity The adverse effect of function.

A kind of 10-1034456 Korean Patent Publication includes the apertures silica coated with organic polymer Electromagnetic wave shielding and heat insulating belt.Since the band includes apertures silica, make the band is thinning to there is limitation.In the band In the case where sheet form, silica can lead to the difference of Local physical property.

In addition, as electronic device becomes smaller and more slim, it may occur however that such as device is asked by what foreign impacts were damaged Topic.In order to control this external force, 10-988204 Korean Patent Publication is a kind of for assigning the skill of the individual function of shell Art.However, the method increase shell price and increasing the overall dimensions of shell.It is only applicable in addition, this method has The problem of specific shell.

Summary of the invention

There is provided the content of present invention is the design in order to introduce selection in schematic form, and the design is in following specific implementation It is further described in mode.The content of present invention is not intended to identify all key features of theme claimed or necessary special Sign, is also not intended to be individually used for assisting in the range of theme claimed.

Therefore, a kind of new structure is had studied, which has the electricity for effectively shielding and absorbing and generate from electronic component The ability of magnetic wave with heat-sinking capability to be effectively dissipated and be discharged the heat generated from electronic component, while having resistance external force Impact absorbing ability, this is because the structure can not allow increase electronic device volume.

The purpose of the disclosure is to realize that there is electromagnetic wave to control energy for a kind of multi-functional composite sheet, the multi-functional composite sheet It has the ability in power (such as, electromagnetic wave shielding and absorption), heat-sinking capability and impact absorbing ability.

In addition, the another object of the disclosure is to realize that a kind of multi-functional composite sheet, the multi-functional composite sheet have logical Cross the final thickness for omitting unnecessary layer using novel process and being reduced.

In addition, a further object for the disclosure is to realize that a kind of multi-functional composite sheet, the multi-functional composite sheet utilize volume There is the productivity improved to volume technique (roll-to-roll process).

In the one side of the disclosure, providing one kind has the function of electromagnetic wave shielding, heat sinking function and impact absorbing energy The multi-functional composite sheet of energy, wherein the multi-functional composite sheet includes: impact absorbing layer；Metal foil layer is arranged in the impact On absorbed layer；First electromagnetic wave control layer is arranged on the metal foil layer；Graphite linings are arranged in the first electromagnetic wave control On preparative layer；Second electromagnetic wave control layer is arranged in the graphite linings；Nonconductive adhesive layer is arranged in second electromagnetic wave On control layer；And release film layer, it is arranged in the nonconductive adhesive layer, wherein the overall thickness of the multi-functional composite sheet It is 50 μm to 250 μm, the electromagnetic shielding effectiveness of the multi-functional composite sheet is 60dB to 120dB, and described multi-functional multiple The thermal conductivity for closing piece is 250W/mK to 700W/mK.

In one embodiment of the multi-functional composite sheet, the impact absorbing rate of the multi-functional composite sheet be 5% to 50%, and its recovery rate is 90% to 97%.

In one embodiment of the multi-functional composite sheet, the impact absorbing layer has 50 μm to 200 μm of thickness.

In one embodiment of the multi-functional composite sheet, the adhesion strength of the impact absorbing layer be 500gf/in extremely 1500gf/in。

In one embodiment of the multi-functional composite sheet, the impact absorbing layer includes foam of polymers, wherein institute State foam of polymers by acrylic foam, polyurethane foam, polyethylene, expanded polyolefin, polyvinyl chloride (PVC) foam, Polycarbonate (PC) foam, polyimide foam, polyethyerimide foam, polyamide foam, polyester form, polyvinylidene chloride At least one of foam, polymethyl methacrylate foam and polyisocyanate foam are made.

In one embodiment of the multi-functional composite sheet, the foam of polymers is steeped by polyurethane foam or acrylic acid Foam is made.

In one embodiment of the multi-functional composite sheet, the density of the impact absorbing layer is 0.2g/cm³Extremely 0.8g/cm³。

In one embodiment of the multi-functional composite sheet, the tensile strength of the impact absorbing layer is 1kgf/cm²Extremely 15kgf/cm²。

In one embodiment of the multi-functional composite sheet, the tensile strength of the impact absorbing layer is 2.5kgf/cm² To 12.5kgf/cm²。

In one embodiment of the multi-functional composite sheet, the metal foil layer by copper (Cu), nickel (Ni), aluminium (Al), At least one of tin (Sn), the copper being plated, the nickel being plated, the aluminium being plated and the tin being plated are made.

In one embodiment of the multi-functional composite sheet, selected at least using from nickel, tin, cobalt, chromium, gold and silver A kind of metal execution plating.

In one embodiment of the multi-functional composite sheet, the metal foil layer includes the composite metallic material of nickel and tin Layer.

In one embodiment of the multi-functional composite sheet, the metal foil layer with a thickness of 9 μm to 70 μm.

In one embodiment of the multi-functional composite sheet, the first electromagnetic wave control layer includes having 5 μm to 200 μm thickness and 2.5kgf/in to 3kgf/in peel strength electro-magnetic wave absorption adhesive phase.

In one embodiment of the multi-functional composite sheet, the first electromagnetic wave control layer has 100 μ₀To 200 μ₀ Magnetic conductivity.

In one embodiment of the multi-functional composite sheet, the first electromagnetic wave control layer includes basis material and electricity The mixture of electro-magnetic wave absorption material, described matrix material are made of fluoropolymer resin or rubber.

In one embodiment of the multi-functional composite sheet, described matrix material include acrylic resin, epoxy resin, In alkyd resin, polyurethane resin, polyimides, nitrocellulose, Pioloform, polyvinyl acetal, silicon rubber, polyethers and polyolefin It is at least one.

In one embodiment of the multi-functional composite sheet, the electromagnetic wave absorbent material includes that permalloy, mountain reach At least one of this special alloy, silicon steel, Alperm alloy, Permendur alloy and electromagnetism stainless steel.

In one embodiment of the multi-functional composite sheet, the first electromagnetic wave control layer includes with 5 μm to 10 μ The electromagnetism wave screen of the electromagnetic shielding effectiveness of the thickness of m, the peel strength of 2.5kgf/in to 3kgf/in and 40dB to 80dB Cover adhesive phase.

In one embodiment of the multi-functional composite sheet, the first electromagnetic wave control layer include by binder resin and Electromagnetic wave shielding adhesive phase made of the mixture of conductive filler.

In one embodiment of the multi-functional composite sheet, the binder resin includes hotmelt and pressure-sensitive adhesion At least one of agent (PSA).

In one embodiment of the multi-functional composite sheet, the conductive filler is filled out including golden (Au) filler, palladium (Pd) Material, chromium (Cr) filler, carbon (C) filler, titanium (Ti) filler, zinc (Zn) filler, silver (Ag) filler, copper (Cu) filler, nickel (Ni) are filled out Material and aluminium (Al) filler and at least one of the wicker copper filler obtained and coating silver-colored (Ag) on copper (Cu) powder.

In one embodiment of the multi-functional composite sheet, the graphite linings with 17 μm to 40 μm thickness and The thermal conductivity of 800W/mK to 1200W/mK.

In one embodiment of the multi-functional composite sheet, the graphite linings are in the shape of the piece made of artificial graphite Formula, and the graphite linings are formed to have one or more holes defined therein by punching press or perforation.

In one embodiment of the multi-functional composite sheet, the average diameter in each hole in the hole be 2mm extremely 10mm, wherein the area in the hole is the 10% to 30% of the gross area of the graphite linings.

In one embodiment of the multi-functional composite sheet, the hole include have 2mm to 5mm average diameter One hole and the second hole of the average diameter with 5mm to 6mm, wherein first hole is located at the centre of the graphite linings, And second hole is located in the periphery of the graphite linings to surround first hole.

In one embodiment of the multi-functional composite sheet, the graphite linings further include carbon nanotube (CNT) or graphite Alkene.

In one embodiment of the multi-functional composite sheet, the second electromagnetic wave control layer includes having 1 μm to 2 μm Thickness and 40dB to 80dB electromagnetic shielding effectiveness metal cladding.

In one embodiment of the multi-functional composite sheet, the metal cladding have one defined therein or More through-holes, wherein the graphite linings are formed by graphite flake, and the graphite flake is horizontally disposed and passes through the through-hole each other It is spaced apart, wherein the nonconductive adhesive layer and the first electromagnetic wave control layer are bonded to each other and are fixed by the through-hole.

In one embodiment of the multi-functional composite sheet, the second electromagnetic wave control layer includes with 5 μm to 10 μ The electromagnetism wave screen of the electromagnetic shielding effectiveness of the thickness of m, the peel strength of 2.5kgf/in to 3kgf/in and 60dB to 120dB Cover adhesive phase.

In one embodiment of the multi-functional composite sheet, the multi-functional composite sheet further includes acryloid cement Layer, the acrylic adhesive layer is arranged on the impact absorbing layer, opposite with the metal foil layer.

In one embodiment of the multi-functional composite sheet, the acrylic adhesive layer is inhaled with a thickness of the impact Receive the 3% to 40% of the thickness of layer.

In one embodiment of the multi-functional composite sheet, the acrylic adhesive layer has 5 μm to 20 μm of thickness The adhesion strength of degree and 1.6kgf/in to 2kgf/in, wherein the impact absorbing layer has 50 μm to 200 μm of thickness.

In one embodiment of the multi-functional composite sheet, the nonconductive adhesive layer has 5 μm to 10 μm of thickness And the peel strength of 2.5kgf/in to 3kgf/in.

In one embodiment of the multi-functional composite sheet, the nonconductive adhesive layer has 10¹²Ω * cm to 10¹⁷ The insulation resistivity of Ω * cm and the breakdown voltage of 1500V to 2000V.

In one embodiment of the multi-functional composite sheet, by utilizing comma coater or gravure coating machine by thermosetting Property adhesive composition be coated in the release film layer and form the nonconductive adhesive layer.

In one embodiment of the multi-functional composite sheet, the heat-curable adhesive composition include epoxy resin, Polyurethane and one of acrylic rubber and acrylate-butadiene rubber or more.

In another aspect of the present disclosure, provide a kind of including radiator and multi-functional composite sheet as defined above Electronic device, wherein the multi-functional composite sheet contacts the radiator.

, it can be achieved that having electromagnetic wave control ability (such as, electromagnetic wave shielding and suction in first effect of the disclosure Receive), the competent multi-functional composite sheet of institute in heat-sinking capability and impact absorbing ability.

In addition, it can be achieved that such a multi-functional composite sheet, described multi-functional compound in second effect of the disclosure Piece has the final thickness being reduced and omitting unnecessary layer using novel process.

In addition, it can be achieved that such a multi-functional composite sheet, described multi-functional compound in the third effect of the disclosure Piece has the productivity improved using roll-to-roll process.

The effect and advantage of the disclosure can be not limited to above content, but can show from specific embodiment below And it is clear to.

Detailed description of the invention

The attached drawing for being comprised in this specification and being formed a part of this specification shows embodiment of the disclosure, And together with the description for explaining the principles of this disclosure, in the accompanying drawings, identical label indicates identical element.

Fig. 1 is the sectional view according to the multi-functional composite sheet of one embodiment of the disclosure.

Fig. 2 is the schematic diagram for forming the method in hole in graphite flake.

Fig. 3 schematically shows laminated electromagnetic wave and absorbs adhesive phase, forms porose graphite flake and metal cladding And the method for nonconductive adhesive layer.

Fig. 4 is located in the schematic diagram of the graphite flake on the metal cladding as the second electromagnetic wave control layer in Fig. 3.

Fig. 5 is the schematic diagram for forming the method for nonconductive adhesive layer in release film layer.

Fig. 6 is the sectional view of multi-functional composite sheet according to another embodiment of the present disclosure.

Fig. 7 is the schematic diagram for the method for producing the present exemplary 1 of the disclosure.

Fig. 8 is the schematic diagram of electromagnetic shielding effectiveness assessment equipment.

Fig. 9 is the schematic diagram of thermal conductivity assessment equipment.

Figure 10 is the schematic diagram of adhesion strength assessment equipment.

Figure 11 is the schematic diagram for assessing the method for impact absorbing rate.

For the brevity and clearness of explanation, the element in attached drawing is not drawn necessarily to scale.Phase in different attached drawings The same or similar element is indicated with drawing reference numeral, therefore executes similar function.Moreover, being omitted for the brevity of description The description and details of well-known step and element.In addition, the disclosure it is described in detail below in, elaborate many specific Details is to provide the thorough understanding to the disclosure.It will be understood, however, that can practice without these specific details The disclosure.In other cases, it is not described in well-known method, process, component and circuit, in order to avoid unnecessarily mould Paste various aspects of the disclosure.

Specific embodiment

It is further illustrated below and describes the example of various embodiments.It will be appreciated that description here, which is not intended to, to be made Claim is limited to described specific embodiment.On the contrary, description here, which is intended to covering, can be included in by claim Defined by substitution, modification and equivalent in spirit and scope of the present disclosure.

The terms such as " first ", " second ", " third " can be used herein to describe various elements, group although will be appreciated that Part, regions, layers, and/or portions, but these elements, component, regions, layers, and/or portions should not be limited by these terms.This A little terms are used to distinguish an element, component, region, layer or part and another element, component, region, layer or part.Cause This, without departing from the spirit and scope of the disclosure, first element disclosed below, component, region, layer or part Second element, component, region, layer or part can be referred to as.

Term used herein is not intended to limit this disclosure for for the purpose of describing particular embodiments.On unless Hereafter expressly stated otherwise, otherwise as used herein singular is also intended to including plural form.It will be further understood that It is that term "comprising" and " comprising " specify the feature, integer, operation, element and/or component when used in this manual Presence, but be not excluded for other one or more features, integer, operation, element, component and/or the presence of its part or add Add.As used herein, term "and/or" includes one or more any combination and whole groups in related institute's list It closes.The statement of such as "...... at least one" can modify entire element list when before element list, and can Not modify the discrete component in list.

For ease of description, can use herein such as " lower section ", " ... under ", " lower part ", " below ", " ... On ", the spatially relative terms such as " top " passes of an elements or features and another elements or features as shown in the figure described System.It will be appreciated that spatially relative term except include be also intended in addition to discribed orientation in figure including device in use or Different direction in operation.For example, if device in flipchart, be described as " " another elements or features " under The element of side ", " lower part " or " following " will be positioned " top " of " " another elements or features.Therefore, exemplary art Language " lower section " and " following " may include above and below two kinds of orientation.Device can be positioned otherwise (for example, being rotated by 90 ° Or it is in other orientation), and space as used herein should be interpreted accordingly and describe language relatively.

Unless otherwise defined, all terms as used herein including technical term and scientific and technical terminology have and this hair The identical meaning of the normally understood meaning of bright design those of ordinary skill in the art.It will be further appreciated that term is (all Such as the term defined in common dictionary) should be interpreted as having it is consistent with its meaning in the contexts of the association area Meaning, and unless be clearly defined here, it otherwise will not be understood to idealization or meaning too formal.

In the following description, numerous specific details are set forth to provide the thorough understanding to the disclosure.Can there is no this The disclosure is practiced in the case where some or all of a little details.In other cases, it is not described in well-known Procedure structure and/or process, in order to avoid unnecessarily obscure the disclosure.

Have the function of electromagnetic wave shielding, heat sinking function and impact absorbing function according to one embodiment of the disclosure Multi-functional composite sheet 100 includes: impact absorbing layer 110；Metal foil layer 120 is arranged on impact absorbing layer 110；First electromagnetism Wave control layer 130 is arranged on metal foil layer 120；Graphite linings 140 are arranged on the first electromagnetic wave control layer 130；Second electricity Magnetic wave control layer 150 is arranged in graphite linings 140；Nonconductive adhesive layer 160 is arranged on the second electromagnetic wave control layer 150； And release film layer 170, it is arranged in nonconductive adhesive layer 160.Multi-functional composite sheet 100 can have 50 μm to 250 μm of thickness The thermal conductivity of degree, the electromagnetic shielding effectiveness of 60dB to 120dB and 250W/mK to 700W/mK.

Had while keeping its small thickness according to the multi-functional composite sheet 100 of the disclosure electromagnetic wave control ability, It has the ability in heat-sinking capability and impact absorbing ability.The overall thickness of multi-functional composite sheet 100 and usually used only tool There is electromagnetic wave control ability or only the individual piece with heat-sinking capability has the same or similar range.

In recent years, the miniaturization as electronic device becomes smaller and more slim, to the component of setting on the electronic device It is growing with the demand of slimming.On the other hand, traditionally, each individual component is needed to realize electromagnetic wave control Each of ability, heat-sinking capability and impact absorbing ability.Therefore, the quantity of component increases and its volume increases.This can This traditional method can be caused not to be suitable for the electronic device of miniaturization and slimming.

It can be manufactured, and can not increased by novel manufacturing method according to the multi-functional composite sheet of the present embodiment Electromagnetic wave control ability, heat-sinking capability and shock absorption energy are effectively realized in the case where total thickness and volume of electronic device It has the ability in power.

Multi-functional composite sheet 100 can have 50 μm to 250 μm thickness, 60dB to 120dB electromagnetic shielding effectiveness with And the thermal conductivity of 250W/mK to 700W/mK.

When the thickness of multi-functional composite sheet is less than 50 μm, it is difficult to for substrate (such as, including multi-functional composite sheet Electronic device) external force enough resistivities is provided.When thickness is greater than 250 μm, thickness is too big so that it cannot be applied to The electronic device of miniaturization and slimming.

When the electromagnetic shielding effectiveness of multi-functional composite sheet and thermal conductivity are lower than above range, it may not be possible to reliably control The electromagnetic wave and heat generated in electronic device processed.When the electromagnetic shielding effectiveness and thermal conductivity of multi-functional composite sheet are more than above-mentioned model When enclosing, the overall thickness of multi-functional composite sheet increases, this is not suitable for the electronic device of miniaturization and slimming.

Multi-functional composite sheet 100 can have 5% to 50% impact absorbing rate and 90% to 97% recovery rate.

When the impact absorbing rate of multi-functional composite sheet 100 and recovery rate are lower than range above, to being applied to electronic device External force resistance it is low so that electronic device is not adequately protected.When the impact absorbing rate and recovery of multi-functional composite sheet 100 When rate is more than above range, manufactured multi-functional composite sheet 100 is too thick so that it cannot being produced by roll-to-roll process more Function and service piece 100.

Impact absorbing layer 110 can have 50 μm to 200 μm of thickness.In the multi-functional composite sheet 100 according to the present embodiment In, at least one of the first electromagnetic wave control layer 130, the second electromagnetic wave control layer 150 and impact absorbing layer 110 can not make With being directly arranged in the case where individual adhesive etc., and can be firmly held in place.

When the thickness of impact absorbing layer 110 is less than 50 μm, the achievable impact absorbing rate of impact absorbing layer 110 is reduced, So as to can not protective substrate (electronic device such as, including multi-functional composite sheet 100) from external force.Work as impact absorbing layer When 110 thickness is more than 200 μm, heat dissipation performance can be reduced, in addition, include the multi-functional composite sheet 100 of impact absorbing layer 110 Overall thickness can unnecessarily increase.

In addition, impact absorbing layer 110 itself can be contacted directly and is fixed on metal foil layer 120, without using individually Adhesive.Impact absorbing layer 110 can have the adhesion strength (adhesive of 500gf/in (gram force/per inch) to 1500gf/in power)。

When the adhesion strength of impact absorbing layer 110 is less than 500gf/in, between impact absorbing layer 110 and metal foil layer 120 Adhesion strength reduce so that there are problems that during the manufacture of multi-functional composite sheet 100 impact absorbing layer 110 separation.In addition, It is reduced by the impact absorbing ability that impact absorbing layer 110 is realized.On the contrary, the adhesion strength when impact absorbing layer 110 is greater than 1500gf/ When in, this leads to open defect during producing multi-functional composite sheet 100 and reduces processing efficiency.

Impact absorbing layer 110 includes foam of polymers.Foam of polymers can be acrylic foam (acrylic foam), Polyurethane foam (polyurethane foam), polyethylene (polyethylene foam), expanded polyolefin (polyolefin foam), polyvinyl chloride foam (polyvinyl chloride foam), polycarbonate foam (polycarbonate foam), polyimide foam (polyimide foam), polyethyerimide foam (polyetherimide foam), polyamide foam (polyamide foam), gather polyester form (polyester foam) Vinylidene chloride foam (polyvinylidene chloride foam), polymethyl methacrylate foam (polymethyl At least one of methacrylate foam) and polyisocyanate foam (polyisocyanate foam).Preferably, gather Closing object foam can be polyurethane foam or acrylic foam.

The density of impact absorbing layer 110 can be 0.2g/cm³To 0.8g/cm³。

When the density of impact absorbing layer 110 is less than 0.2g/cm³When, the intensity of this layer is so low so that it can easily It is torn by external force.In addition, after attachment can re-workability may be poor, and be likely difficult to protect due to low impact absorbing rate Protect substrate.On the contrary, the density when impact absorbing layer 110 is more than 0.8g/cm³When, impact absorbing layer 110 is curable and loses foam Function is simultaneously therefore possibly can not protective substrate.

The tensile strength of impact absorbing layer 110 can be 1kgf/cm²To 15kgf/cm²。

When the tensile strength of impact absorbing layer 110 is less than 1kgf/cm²When, the strength reduction of impact absorbing layer 110, the punching Hit absorbed layer 110 can easily by external force destroy or tear, and adhere to after can re-workability it is poor.In addition, impact is inhaled The tensile strength of receipts layer 110 is too low and reduces impact absorbing rate, so that it is difficult to protective substrate.On the contrary, working as impact absorbing layer 110 tensile strength is more than 15kgf/cm²When, impact absorbing layer 110 becomes to solidify, and therefore substrate cannot be protected. Preferably, impact absorbing layer has 2.5kgf/cm²To 12.5kgf/cm²Tensile strength.

Metal foil layer 120 can by copper Cu, nickel, aluminium Al, tin Sn, the copper being plated, the nickel being plated, the aluminium being plated and At least one of tin being plated is made.Metal foil layer 120 according to an embodiment of the present disclosure can be by will be in above-mentioned material At least two materials mixing and be implemented as composition metal layers of foil.This can further improve electromagnetic wave shielding ability.It can be used Nickel, tin, cobalt, chromium, gold and silver at least one of metal carry out plating.Preferably, metal foil layer 120 can answering by nickel and tin Metal foil layer is closed to be made.

The thickness of metal foil layer 120 can be between 9 μm to 70 μm.

When the thickness of metal foil layer 120 is less than 9 μm, such as corrugated defect is likely to occur in during roll-to-roll operation In metal foil layer 120, therefore the speed of roll-to-roll operation may be decreased.On the contrary, the thickness when metal foil layer 120 is more than 70 μm When, it may be crimped during roll-to-roll operation.In addition, in the mass production of multi-functional composite sheet 100, around roller Winding amount is likely to reduced, so that yield may be decreased and the machinability in Sheet Metal Forming Technology may be poor.Further, since golden The thickness for belonging to layers of foil 120 is too thick, therefore the application of multi-functional composite sheet 100 is restricted.

First electromagnetic wave control layer 130 may be provided on metal foil layer 120.First electromagnetic wave control layer 130 may include electricity Electro-magnetic wave absorption adhesive or electromagnetic wave shielding adhesive.

For example, the first electromagnetic wave control layer 130 may include with 5 μm to 200 μm thickness and 2.5kgf/in extremely The electro-magnetic wave absorption adhesive of the peel strength (peel strength) of 3kgf/in.

First electromagnetic wave control layer 130 can be electro-magnetic wave absorption adhesive.At this point, when the first electromagnetic wave controls When the thickness of layer 130 is less than 5 μm, it is difficult to realize enough electro-magnetic wave absorption abilities, and be difficult to be firmly attached setting the Individual layer on each of one surface of one electromagnetic wave control layer 130 and another surface.On the contrary, when the first electromagnetic wave When the thickness of control layer 130 is greater than 200 μm, increase for eliminating the drying time of mobility of the first electromagnetic wave control layer 130. In addition, during roll-to-roll process, the first electromagnetic wave control layer 130 may due to roller pressure and from multi-functional composite sheet 100 It protrudes and laterally flows out.In addition, the overall thickness of multi-functional composite sheet 100 increases with the application of margining tablet 100.

When the peel strength of the first electromagnetic wave control layer 130 is less than 2.5kgf/in, this may cause layer adjacent thereto It can not firmly fix on it and lead to process failure.On the contrary, the peel strength when the first electromagnetic wave control layer 130 is greater than When 3kgf/in, the first electromagnetic wave control layer 130 and a surface being separately positioned on the first electromagnetic wave control layer 130 and another Adherency between layer on a surface may be uneven, and is likely difficult to reprocess when a defect occurs.

The magnetic conductivity of first electromagnetic wave control layer 130 can be 100 μ₀To 200 μ₀, wherein μ₀Indicate space permeability.

When the magnetic conductivity of the first electromagnetic wave control layer 130 is less than 100 μ₀When, it is difficult to fully realize electro-magnetic wave absorption energy Power.On the contrary, the magnetic conductivity when the first electromagnetic wave control layer 130 is greater than 200 μ₀When, the thickness of the first electromagnetic wave control layer 130 is not Necessarily increase.

First electromagnetic wave control layer 130 can be the mixture of basis material and electromagnetic wave absorbent material, the basis material It is made of fluoropolymer resin or rubber.

Basis material may include acrylic resin, epoxy resin, alkyd resin, polyurethane resin, polyimides (polyimide), nitrocellulose (nitrocellulose), Pioloform, polyvinyl acetal (polyvinylacetal), silicon rubber, At least one of polyethers and polyolefin.Electromagnetic wave absorbent material may include permalloy, Sendust (sendust), at least one of silicon steel, Alperm alloy, Permendur alloy and electromagnetism stainless steel.

Optionally, the first electromagnetic wave control layer 130 can be electromagnetic wave shielding adhesive.At this point, the first electromagnetism Wave control layer 130 can have 5 μm to 10 μm of thickness, the peel strength of 2.5kgf/in to 3kgf/in and 40dB to 80dB's Electromagnetic shielding effectiveness.Preferably, electromagnetic shielding effectiveness can be 60dB.

First electromagnetic wave control layer 130 can be electromagnetic wave shielding adhesive.When the thickness of the first electromagnetic wave control layer 130 When less than 5 μm, it is difficult to realize enough adhesion strengths.It is multi-functional multiple when the thickness of the first electromagnetic wave control layer 130 is greater than 10 μm The overall thickness for closing piece 100 increases, and is difficult to apply uniform power by roller in roll-to-roll process, this leads to the part of adhesion strength Difference.

When the peel strength of the first electromagnetic wave control layer 130 is less than 2.5kgf/in, the layer of multi-functional composite sheet 100 it Between adhesion strength become too small.When the peel strength of the first electromagnetic wave control layer 130 is greater than 3kgf/in, the first electromagnetic wave control Adherency between preparative layer 130 and the layer being arranged on the surface and another surface of the first electromagnetic wave control layer 130 is uneven, And it is difficult to reprocess when a defect occurs.

In addition, when the electromagnetic shielding effectiveness of the first electromagnetic wave control layer 130 is less than 40dB, it is difficult to realize enough electricity Magnetic wave screening ability.Accordingly, it is difficult to which piece 100 is applied to electronic device.When the electromagnetic wave shielding of the first electromagnetic wave control layer 130 When efficiency is greater than 80dB, the thickness of the first electromagnetic wave control layer 130 unnecessarily increases.

First electromagnetic wave control layer 130 can be electromagnetic wave shielding adhesive, which can be by gluing The mixture of resin and conductive filler is made.

Binder resin can be made of at least one of hotmelt and contact adhesive (PSA).Conductive filler can With by golden Au, palladium Pd, chromium Cr, carbon C, titanium Ti, zinc Zn, silver Ag, copper Cu, nickel, aluminium Al and by copper powder coat silver and At least one of wicker copper (silver-coated copper) filler of acquisition is made.

Graphite linings 140 can have 17 μm to 40 μm of thickness and the thermal conductivity of 800W/mK to 1200W/mK.

When the thickness of graphite linings 140 is less than 17 μm, it is difficult to realize enough thermal conductivities.When the thickness of graphite linings 140 is big When 40 μm, when forming hole in graphite linings 140 by punching press etc., there is the problem of such as cracking.Accordingly, it is difficult to be formed Hole.

When the thermal conductivity of graphite linings 140 is lower than 800W/mK, it is difficult to obtain enough heat-sinking capabilities.When graphite linings 140 When thermal conductivity is higher than 1200W/mK, the overall thickness of multi-functional composite sheet 100 increases since the thickness of graphite linings 140 increases.

Fig. 2 is the schematic diagram for forming the method in hole in graphite flake.Fig. 3 be laminated electromagnetic wave absorb adhesive phase, Form the schematic diagram of the method for porose graphite flake and metal cladding and nonconductive adhesive layer.Fig. 4 is located in Fig. 3 Schematic diagram as the graphite flake on the metal cladding of the second electromagnetic wave control layer.

Referring to Fig. 2 to Fig. 4, graphite linings 140 can be formed by artificial stone ink sheet, and can be formed as through the stamping process There is at least one hole wherein.

The hole is formed as circular shape.The average diameter in the hole can be 2mm to 10mm.The area in the hole can Think the 10% to 30% of the gross area of graphite linings.

When the average diameter in the hole is less than 2mm, it is difficult to support and combine graphite linings upper layer sandwiched therebetween under Layer.When the average diameter in the hole is greater than 10mm, the relative area of graphite linings reduces, therefore thermal conductivity reduces rapidly.

In addition, when the area in the hole relative to the gross area of graphite linings ratio less than 10% when, it is difficult to support and tie Close the upper and lower that graphite linings are sandwiched therebetween.When the area in the hole is greater than relative to the ratio of the gross area of graphite linings When 30%, thermal conductivity is greatly lowered, this can lead to the problem of.

Optionally, the hole may include the first hole of the average diameter with 2mm to 5mm and putting down with 5mm to 6mm Second hole of equal diameter.First hole is located at the center of graphite linings.Second hole can be positioned so that the perimeter in graphite linings One hole.

The hole may include having the first hole of lesser average diameter and big with the average diameter than the first hole Second hole of average diameter.The center of graphite linings is set with the first hole of lesser diameter, and is had more straight than the first hole Second hole of the big diameter of diameter is arranged on periphery.Thus, the heat that can accumulate in center portion can be effectively dissipated.By the second hole cloth It sets and allows the adhered area between the layer for clamping graphite linings to increase on periphery.Therefore, the layer for clamping graphite linings can be by steadily It keeps, without being separated from each other due to the external impact for being applied to edge.

One or more graphite flakes can be arranged in removable membrane removal and be fixed in position.Then, can pass through Perforation or punching press are carried out to graphite flake to form multiple holes.The graphite flake for wherein defining the multiple hole can be stacked simultaneously quilt Fixed to nonconductive adhesive layer, wherein the metal cladding as the second electromagnetic wave control layer is interposed therebetween, to form graphite Layer.Then, the electro-magnetic wave absorption adhesive as the first electromagnetic wave control layer can be set in graphite linings.

At least one through-hole can be formed in metal cladding.Graphite linings can be by arranging at least two graphite flake shapes At wherein the through-hole is in the horizontal direction between at least two graphite flake.Nonconductive adhesive layer and the first electromagnetism Wave control layer can be adhering to each other and be fixed by the through-hole.

For example, metal cladding can be formed in the graphite linings of sheet form arrangement by electroless plating method.In addition, first Electromagnetic wave control layer can be that by the functional adhesive layer of electro-magnetic wave absorption and function of shielding and insulation function.Example Such as, it when the layer is heated to 60 DEG C or higher, is bonded on the surface of the first electromagnetic wave control layer.Therefore, described Layer can be stacked according to predetermined order.

Graphite flake is separated from each other to form graphite linings.Graphite flake can be arranged to through the through-hole between them to each other It separates.Nonconductive adhesive layer and the first electromagnetic wave control layer can be combined by the through-hole.Therefore, metal cladding and Graphite linings can be fixed in the case where not adding individual adhesive member.

Heat reactivity contact adhesive (pressure sensitive can be used in graphite linings 140 according to this embodiment adhesive,PSA).By using heat reactivity PSA, Laminated Graphite layer 140.Then, heat reactivity PSA is removed.Therefore, when When removing PSA, the damage of graphite linings 140 can be minimized.Heat reactivity PSA can be the bonding being made of acrylic resin Agent.When applying heat to PSA, acrylic resin will have glass transition (that is, mobility).Therefore, when heating heat reactivity When PSA, adhesion strength weakens, and allows and is easily separated the layer when repairing product.

Graphite linings 140 may also include CNT or graphene.When graphite linings further include CNT or graphene, surface area can be It is further increased in the case where not increasing thickness, this can further improve heat-sinking capability.

Second electromagnetic wave control layer 150 can be metal cladding or electromagnetic wave shielding adhesive.

When the second electromagnetic wave control layer 150 is metal cladding, the second electromagnetic wave control layer 150 can have 1 μm to 2 μm Thickness, and can have the electromagnetic shielding effectiveness of 40dB to 80dB.

Second electromagnetic wave control layer 150 can be metal cladding.When the thickness of the second electromagnetic wave control layer 150 is less than 1 μ When m, the thickness of the second electromagnetic wave control layer 150 is too thin and causes the surface of the second electromagnetic wave control layer 150 in roll-to-roll process It wrinkles or tears in the process.In addition, this may will increase and be produced into when the thickness of the second electromagnetic wave control layer 150 is greater than 2 μm Sheet and the Flexible Ability that multi-functional composite sheet may be reduced.

In addition, when the electromagnetic shielding effectiveness of the second electromagnetic wave control layer 150 be lower than 40dB when, it is difficult to substrate (such as, Electronic device including multi-functional composite sheet) in realize enough electromagnetic wave shielding abilities.When the second electromagnetic wave control layer 150 When electromagnetic shielding effectiveness is greater than 80dB, the thickness of the second electromagnetic wave control layer increases.

Optionally, when the second electromagnetic wave control layer 150 is electromagnetic wave shielding adhesive, the thickness of the layer can be from 5 μm To 10 μm.The peel strength of the layer can be 2.5kgf/in to 3kgf/in, and its electromagnetic shielding effectiveness can be 60dB to 120dB.Preferably, electromagnetic shielding effectiveness can be 110dB.

Second electromagnetic wave control layer 150 can be electromagnetic wave shielding adhesive.When the thickness of the second electromagnetic wave control layer 150 When less than 5 μm, the too thin surface for be arranged in the second electromagnetic wave control layer 150 of thickness and another for roll-to-roll process The adhesion strength between layer and the second electromagnetic wave control layer 150 on one surface is low, leads to the separation between the layer.On the contrary, working as When the thickness of second electromagnetic wave control layer 150 is greater than 10 μm, it is difficult to uniformly be pressed by roller, therefore the second electromagnetic wave controls The some parts of layer 150 may not be able to be formed uniformly.In addition, when the electromagnetic shielding effectiveness of the second electromagnetic wave control layer 150 When less than 60dB, it is difficult to realize enough electromagnetism wave screens in substrate (electronic device such as, including multi-functional composite sheet 100) Cover ability.When the electromagnetic shielding effectiveness of the second electromagnetic wave control layer 150 is greater than 120dB, the second electromagnetic wave control layer 150 Thickness increases.

Nonconductive adhesive layer 160 can have 5 μm to 10 μm of thickness and the peel strength of 2.5kgf/in to 3kgf/in.

When the thickness of nonconductive adhesive layer 160 is less than 5 μm, thickness is too thin, therefore is likely to occur in roll-to-roll process The part of not formed nonconductive adhesive layer 160.That is, it may occur however that process failure.When the thickness of nonconductive adhesive layer 160 When greater than 10 μm, nonconductive adhesive layer 160 may be too thick and the overall thickness of multi-functional composite sheet 100 is unnecessarily increased. In addition, adhesion strength is too small without being capable of fixing the second electromagnetic wave control layer 150 when peel strength is less than 2.5kgf/in.On the contrary, When peel strength is greater than 3kgf/in, adhesion strength is so big so that be difficult to control roll-to-roll process, therefore even if defect can It is also difficult to remove defect when being corrected in other ways.

Nonconductive adhesive layer 160 can have 10¹²Ω * cm to 10¹⁷The insulation resistivity and 1500V to 2000V of Ω * cm Breakdown voltage.Preferably, nonconductive adhesive layer 160 can have 10¹⁵The insulation resistivity of Ω * cm, and breakdown voltage can be with It is 1800V.

It is multi-functional compound when nonconductive adhesive layer 160 has the insulation resistivity and breakdown voltage lower than range above Piece possibly can not work well when being attached to electronic device.When the insulation resistivity and breakdown potential of nonconductive adhesive layer 160 When pressure is more than range above, this may cause the thickness for unnecessarily increasing nonconductive adhesive layer 160.

It, can be by utilizing comma coater (comma coater) or gravure coating machine (gravure referring to Fig. 5 Coater) heat-curable adhesive composition is coated in release film layer and forms nonconductive adhesive layer 160.Resinoid Composition can be one or more in epoxy resin, polyurethane and acrylic rubber and acrylate-butadiene rubber.

For example, insulating binder composition can be prepared.Using comma coater or gravure coating machine by insulating binder Composition is coated in as on the first basement membrane of the first release film layer.Then, it can be covered by passing through drying oven drying coated Composition.Then, the second basement membrane as the second release film can be attached to by dry coating, while they are passed through together Between roller.

Hereinafter, referring to Fig. 6, another embodiment of the present disclosure will be described.In addition to being described below, the content of the embodiment Similar to content described in embodiment described in Fig. 1 to Fig. 5, thus by omission to the detailed description of duplicate contents.

Referring to Fig. 6, the multi-functional composite sheet 200 according to the present embodiment includes: impact absorbing layer 110；Metal foil layer 120, It is arranged on impact absorbing layer 110；First electromagnetic wave control layer 130 is arranged on metal foil layer 120；Graphite linings 140, setting On the first electromagnetic wave control layer 130；Second electromagnetic wave control layer 150 is arranged in graphite linings 140；Nonconductive adhesive layer 160, it is arranged on the second electromagnetic wave control layer 150；And release film layer 170, it is arranged in nonconductive adhesive layer 160.Propylene Sour adhesive phase 210 can be further disposed on another surface opposite with metal foil layer 120 of impact absorbing layer 110.

The thickness of acrylic adhesive layer 210 can be the 3% to 40% of the thickness of impact absorbing layer 110.

Acrylic adhesive layer 210 may be provided on impact absorbing layer 110, to realize together with impact absorbing layer 110 pair The impact absorbing ability of external force.At this point, when the thickness of acrylic adhesive layer 210 is relative to impact absorbing layer 110 When the ratio of thickness is less than 3%, this will appear problem, this is because such thickness can not achieve enough adhesion strengths.When third It, may be in roll-to-roll work when the thickness of olefin(e) acid adhesive phase 210 is more than 40% relative to the ratio of the thickness of impact absorbing layer 110 Non-uniform thickness is formed due to the pressure of roller application in skill.

Acrylic adhesive layer 210 is with 5 μm to 20 μm of thickness and the adhesion strength of 1.6kgf/in to 2kgf/in.Punching The thickness for hitting absorbed layer 110 can be between 50 μm to 200 μm.

When the thickness of acrylic adhesive layer 210 is less than 5 μm and adhesion strength is less than 1.6kgf/in, it is difficult in layer and Enough adhesion strengths are realized between layer.When the thickness of acrylic adhesive layer 210 is greater than 20 μm, this be may cause unnecessarily Increase thickness.When adhesion strength is greater than 2kgf/in, this leads to frequent process failure in roll-to-roll process and is occurring to lack It is also difficult to correct defect in the case where falling into.In addition, when the thickness of impact absorbing layer 110 is less than 50 μm, it is difficult to realize enough Impact absorbing ability.When the thickness of impact absorbing layer 110 is greater than 200 μm, the spacing distance increased between functional layer can be reduced It controls from the heat of substrate and the ability of electromagnetic wave.

According to another aspect of the present disclosure, the disclosure may also include the electronic device with radiator, wherein be retouched above The multi-functional composite sheet stated is contacted with the radiator.Multi-functional composite sheet can be with the radiator inside electronic device contiguously Attachment, wherein release film layer is removed from multi-functional composite sheet.Electronic device can realize electromagnetic wave control using multi-functional composite sheet Ability, heat-sinking capability and impact absorbing ability processed.

The present exemplary and comparative examples of the disclosure is described below.However, following present exemplary is the excellent of the disclosure Example is selected, and the scope of the present disclosure is not limited to present exemplary.

The manufacture of present exemplary and comparative examples

Present exemplary 1

As shown in table 1 and Fig. 7, the graphite flake of the thermal conductivity with 25 μm of thickness and 1000W/mK to 1500W/mK (can The SS1500 obtained from Graftech company) it is bonded on the removal film (R7510Zao) of 75 μ m-thicks.Then, existed using hilted broadsword Multiple circular holes of the diameter with 5mm are stamped out on graphite flake.Removal film is scraped off, so that removal corresponds to the stone in the hole stamped out Ink sheet portion.The area of circular hole is the 10% of the gross area of graphite flake in graphite flake.Then, using electroless copper method have wear Copper capping layer is formed on the graphite flake in hole, the copper capping layer is with 2 μm of thickness and the surface area relative to graphite flake The surface area of 1:1.

It will be with a thickness of the coating solution of 10 μm of insulating film (INS010, ILJIN Materials) using comma coater Coated on the release film (SG31, SKC) with a thickness of 50 μm and dry.Therefore, insulating film is formed.It is exhausted in metal cladding contact While velum, in 60 DEG C to 80 DEG C of temperature 56 DEG C of the glass transition temperature temperature of adhesive (that is, be higher than) and 3kgf/cm²To 5kgf/cm²Pressure under use heat-laminator so that surface adhesion increase with realize metal cladding and absolutely Combination between velum.In this manner it is achieved that stacking gradually release film, insulating binder, metal cladding and graphite flake.

Then, impact absorbing layer is coated on the copper film of 9 μ m-thicks using comma coater.Then, make copper film and impact The composite construction of absorbed layer foams.Therefore, by inhaling electromagnetic wave on the copper film of foaming and the composite construction of impact absorbing layer Receipts adhesive, which is coated to 25 μm of thickness, realizes composite construction.Then, using heat-laminator 60 DEG C to 80 DEG C temperature and 3kgf/cm²To 5kgf/cm²Pressure under be coated with 25 μ m-thicks electro-magnetic wave absorption adhesive copper film and impact absorbing layer Composite construction is laminated on graphite flake.

Overall thickness, electromagnetic shielding effectiveness and the thermal conductivity of obtained multi-functional composite sheet are measured and are recorded in In Tables 1 and 2.

Present exemplary 2 and present exemplary 3

In addition to the difference described in the Tables 1 and 2, composite sheet is prepared according to mode identical with present exemplary 1.

Comparative examples 1 and comparative examples 2

As described in Tables 1 and 2, in addition to forming hole not in graphite linings, according to mode identical with present exemplary 1 Prepare composite sheet.

Table 1

Note: in table 1, IAL refers to nonconductive adhesive layer；SECL refers to the second electromagnetic wave control layer；AL refers to bonding Oxidant layer；GL refers to graphite linings；FECL refers to the first electromagnetic wave control layer；MFL refers to metal foil layer；IMAL refers to impact absorbing Layer；EWSE refers to electromagnetic shielding effectiveness；TC refers to thermal conductivity；EC refers to epoxy resin composite material；GS refers to graphite flake；TH Refer to thickness；EMC refers to epoxide alloy composite material (epoxy metal composite)；PF refers to polyurethane foam； PSA refers to contact adhesive.

Table 2

Note: in table 2, PSA refers to contact adhesive；IMAL refers to impact absorbing layer；CMF refers to composite metallic material； EAA refers to electro-magnetic wave absorption adhesive；ESA refers to electromagnetic wave shielding adhesive；ESAL refers to electromagnetic wave shielding adhesive phase； IAL refers to nonconductive adhesive layer；EWSE refers to electromagnetic shielding effectiveness；TC refers to thermal conductivity；PERM refers to magnetic conductivity；AS is referred to Adhesion strength；IAR refers to impact absorbing rate；IR refers to insulation resistivity；BV refers to breakdown voltage.

The assessment of present exemplary and comparative examples

The appraisal procedure of electromagnetic shielding effectiveness

Referring to Fig. 8, according to ASTM D4935, measuring instrument (including signal generator, receiver and preamplifier are used The E5000 series instrument (can be obtained from Agilent) of (Pre Amp)) it measures.There is no the case where sample on test fixture After lower measurement reference power P1 or voltage V1, sample is mounted on test fixture, then measures power P 2 or voltage V2.It surveys 5 samples are measured, their average value is recorded, shield effectiveness SE calculates as follows:

SE=10log P1/P2 (decibel, dB), SE=20log V1/V2 (decibel, dB)

The appraisal procedure of thermal conductivity

Fig. 9 is the schematic diagram of thermal conductivity assessment equipment.

Referring to Fig. 9, thermal conductivity is measured using 2500 serial equipment of TPS that can be obtained from HOTDISK company.Prepare sample Product 70mm × 70mm, heating power are set as 0.1W, and time of measuring is set as 2 seconds (sec), and sensor uses 7577 types.Measurement 5 A sample simultaneously records the average value between them.

Peel strength test

Figure 10 is the schematic diagram of adhesion strength or peel strength assessment equipment.

Referring to Fig.1 0, peel strength is measured to be carried out with the speed of 300 ± 30mm/min, and unit is expressed as gf/25mm. After each sample carries out 5 measurements, the average value (RT) between them is calculated.After being kept at 80 DEG C 10 minutes immediately Measure sample.The length of width and 200mm of the sample with 25mm, and sample is in turn laminated to SUS304 steel plate.Use 2kg roller It is made a round trip with laminar structure of the speed of 25mm/sec to sample and plate, and therefore presses the laminar structure.Then, make sample It is kept for 30 minutes at 23 ± 2 DEG C of temperature and 50 ± 5% relative humidity.

Appraisal procedure for impact absorbing rate

As shown in figure 11, prepare glass composite sheet, by by the SUS ball of 45g from the height of 45cm fall on said sheets come Measure glass level of breakage.

Disclosure those of ordinary skill in the art are not it is understood that departing from the spiritual of the disclosure or substantially spy In the case where sign, the disclosure can be implemented in other specific forms.It is therefore to be understood that above-described embodiment is in all sides Face is all illustrative and be not restrictive.The scope of the present disclosure is defined by the claims, rather than is limited by above description.This Outside, all changes or modification and its equivalent fallen into spirit and scope of the claims should be interpreted as including in the disclosure In the range of.

Claims

1. a kind of multi-functional composite sheet with electromagnetic wave shielding, heat sinking function and impact absorbing function, wherein described Multi-functional composite sheet includes:

Impact absorbing layer；

Metal foil layer is arranged on the impact absorbing layer；

First electromagnetic wave control layer is arranged on the metal foil layer；

Graphite linings are arranged on the first electromagnetic wave control layer；

Second electromagnetic wave control layer is arranged in the graphite linings；

Nonconductive adhesive layer is arranged on the second electromagnetic wave control layer；And

Release film layer is arranged in the nonconductive adhesive layer,

Wherein, the overall thickness of the multi-functional composite sheet is 50 μm to 250 μm, and the electromagnetic wave shielding of the multi-functional composite sheet is imitated It can be 60dB to 120dB, and the thermal conductivity of the multi-functional composite sheet is 250W/mK to 700W/mK.

2. multi-functional composite sheet according to claim 1, wherein the impact absorbing rate of the multi-functional composite sheet is 5% To 50%, and the recovery rate of the multi-functional composite sheet is 90% to 97%.

3. multi-functional composite sheet according to claim 1, wherein the impact absorbing layer has 50 μm to 200 μm of thickness Degree.

4. multi-functional composite sheet according to claim 1, wherein the adhesion strength of the impact absorbing layer be 500gf/in extremely 1500gf/in。

5. multi-functional composite sheet according to claim 1, wherein the impact absorbing layer includes foam of polymers, wherein The foam of polymers is steeped by acrylic foam, polyurethane foam, polyethylene, expanded polyolefin, polyvinyl chloride (PVC) Foam, polyimide foam, polyethyerimide foam, polyamide foam, polyester form, gathers inclined dichloro at polycarbonate (PC) foam At least one of vinyl foam, polymethyl methacrylate foam and polyisocyanate foam are made.

6. multi-functional composite sheet according to claim 5, wherein the foam of polymers is by polyurethane foam or acrylic acid Foam is made.

7. multi-functional composite sheet according to claim 1, wherein the density of the impact absorbing layer is 0.2g/cm³Extremely 0.8g/cm³。

8. multi-functional composite sheet according to claim 1, wherein the tensile strength of the impact absorbing layer is 1kgf/cm² To 15kgf/cm²。

9. multi-functional composite sheet according to claim 8, wherein the tensile strength of the impact absorbing layer is 2.5kgf/ cm²To 12.5kgf/cm²。

10. multi-functional composite sheet according to claim 1, wherein the metal foil layer is by copper (Cu), nickel (Ni), aluminium (Al), at least one of tin (Sn), the copper being plated, the nickel being plated, the aluminium being plated and the tin being plated are made.

11. multi-functional composite sheet according to claim 10, wherein utilize what is selected from nickel, tin, cobalt, chromium, gold and silver At least one metal executes plating.

12. multi-functional composite sheet according to claim 10, wherein the metal foil layer includes the composition metal of nickel and tin Layers of foil.

13. multi-functional composite sheet according to claim 1, wherein the metal foil layer with a thickness of 9 μm to 70 μm.

14. multi-functional composite sheet according to claim 1, wherein the first electromagnetic wave control layer include have 5 μm extremely The electro-magnetic wave absorption adhesive phase of the peel strength of 200 μm of thickness and 2.5kgf/in to 3kgf/in.

15. multi-functional composite sheet according to claim 1, wherein the first electromagnetic wave control layer has 100 μ₀To 200 μ₀Magnetic conductivity.

16. multi-functional composite sheet according to claim 1, wherein the first electromagnetic wave control layer includes basis material With the mixture of electromagnetic wave absorbent material, described matrix material is made of fluoropolymer resin or rubber.

17. multi-functional composite sheet according to claim 16, wherein described matrix material includes acrylic resin, epoxy Resin, alkyd resin, polyurethane resin, polyimides, nitrocellulose, Pioloform, polyvinyl acetal, silicon rubber, polyethers and polyolefin At least one of.

18. multi-functional composite sheet according to claim 16, wherein the electromagnetic wave absorbent material include permalloy, At least one of Sendust, silicon steel, Alperm alloy, Permendur alloy and electromagnetism stainless steel.

19. multi-functional composite sheet according to claim 1, wherein the first electromagnetic wave control layer include have 5 μm extremely The electromagnetic wave of the electromagnetic shielding effectiveness of 10 μm of thickness, the peel strength of 2.5kgf/in to 3kgf/in and 40dB to 80dB Shield adhesive phase.

20. multi-functional composite sheet according to claim 1, wherein the first electromagnetic wave control layer includes being set by bonding Electromagnetic wave shielding adhesive phase made of the mixture of rouge and conductive filler.

21. multi-functional composite sheet according to claim 20, wherein the binder resin includes hotmelt and pressure-sensitive At least one of adhesive (PSA).

22. multi-functional composite sheet according to claim 21, wherein the conductive filler includes golden (Au) filler, palladium (Pd) filler, chromium (Cr) filler, carbon (C) filler, titanium (Ti) filler, zinc (Zn) filler, silver (Ag) filler, copper (Cu) filler, nickel (Ni) in filler and aluminium (Al) filler and the wicker copper filler obtained and coating silver-colored (Ag) on copper (Cu) powder at least It is a kind of.

23. multi-functional composite sheet according to claim 1, wherein the graphite linings with 17 μm to 40 μm thickness with And the thermal conductivity of 800W/mK to 1200W/mK.

24. multi-functional composite sheet according to claim 1, wherein the graphite linings are in the piece made of artificial graphite Form, and the graphite linings are formed to have one or more holes defined therein by punching press or perforation.

25. multi-functional composite sheet according to claim 24, wherein the average diameter in each hole in the hole is 2mm To 10mm, wherein the area in the hole is the 10% to 30% of the gross area of the graphite linings.

26. multi-functional composite sheet according to claim 25, wherein the hole includes the average diameter with 2mm to 5mm The first hole and the average diameter with 5mm to 6mm the second hole,

Wherein, first hole is located at the centre of the graphite linings, and second hole is positioned in the week of the graphite linings While to surround first hole.

27. multi-functional composite sheet according to claim 1, wherein the graphite linings further include carbon nanotube (CNT) or stone Black alkene.

28. multi-functional composite sheet according to claim 1, wherein the second electromagnetic wave control layer include have 1 μm extremely The metal cladding of the electromagnetic shielding effectiveness of 2 μm of thickness and 40dB to 80dB.

29. multi-functional composite sheet according to claim 28, wherein the metal cladding has defined therein one A or more through-hole, wherein the graphite linings are formed by graphite flake, and the graphite flake is horizontally disposed and passes through the through-hole It is separated from each other, wherein the nonconductive adhesive layer and the first electromagnetic wave control layer are bonded to each other simultaneously by the through-hole It is fixed.

30. multi-functional composite sheet according to claim 1, wherein the second electromagnetic wave control layer include have 5 μm extremely The electromagnetism of the electromagnetic shielding effectiveness of 10 μm of thickness, the peel strength of 2.5kgf/in to 3kgf/in and 60dB to 120dB Wave screen covers adhesive phase.

31. multi-functional composite sheet according to claim 1, further includes acrylic adhesive layer, the acryloid cement Layer is arranged on the impact absorbing layer, opposite with the metal foil layer.

32. multi-functional composite sheet according to claim 31, wherein the acrylic adhesive layer with a thickness of the punching Hit the 3% to 40% of the thickness of absorbed layer.

33. multi-functional composite sheet according to claim 31, wherein the acrylic adhesive layer has 5 μm to 20 μm Thickness and 1.6kgf/in to 2kgf/in adhesion strength, wherein the impact absorbing layer has 50 μm to 200 μm of thickness Degree.

34. multi-functional composite sheet according to claim 1, wherein the nonconductive adhesive layer has 5 μm to 10 μm of thickness The peel strength of degree and 2.5kgf/in to 3kgf/in.

35. multi-functional composite sheet according to claim 1, wherein the nonconductive adhesive layer has 10¹²Ω * cm to 10¹⁷ The insulation resistivity of Ω * cm and the breakdown voltage of 1500V to 2000V.

36. multi-functional composite sheet according to claim 1, wherein by utilizing comma coater or gravure coating machine will Heat-curable adhesive composition is coated in the release film layer and forms the nonconductive adhesive layer.

37. multi-functional composite sheet according to claim 1, wherein the heat-curable adhesive composition includes asphalt mixtures modified by epoxy resin Rouge, polyurethane and one of acrylic rubber and acrylate-butadiene rubber or more.

38. a kind of electronic device, including multi-functional composite sheet described in any one of radiator and claims 1 to 37, Wherein, the multi-functional composite sheet contacts the radiator.