CN106393873B - A kind of composite sheet of multi-layer porous metal and high molecular material - Google Patents
A kind of composite sheet of multi-layer porous metal and high molecular material Download PDFInfo
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- CN106393873B CN106393873B CN201610798351.0A CN201610798351A CN106393873B CN 106393873 B CN106393873 B CN 106393873B CN 201610798351 A CN201610798351 A CN 201610798351A CN 106393873 B CN106393873 B CN 106393873B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
- B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/06—Coating on the layer surface on metal layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
- B32B2255/205—Metallic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
- B32B2260/023—Two or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/048—Natural or synthetic rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Laminated Bodies (AREA)
- Contacts (AREA)
Abstract
The invention discloses the composite sheets of a kind of two or more layers porous metals and high molecular material, and the electric contact prepared by this composite sheet.This composite sheet is combined closely by two or more layers porous metals sheet material and high molecular material, with a thickness of 0.1-5mm.This composite sheet is divided or circumscribed circle diameter prepared by being punched is the small pieces of 1-10mm, may be used as the electric contact of key.Porous metals in the present invention refer to metal mesh, sintered metal mesh, metal lath, metal foam, metallic fiber sintered felt, the metal sheet for having multiple equally distributed or random distribution hole.The material composition on two surfaces of obtained composite sheet is consistent in the present invention, and the contact resistance on two surfaces is all low.The electric contact that key is prepared with this composite material solves the problems, such as that the surface contacted resistance for the electric contact being likely to occur in production process is big or nonconducting since two surfaces of electric contact are same conductions.
Description
Technical field
The present invention relates to a kind of field of compound material, it is more particularly related to which composite conducting material, this compound
Conductive material is suitable for making the electric contact of key.
Background technique
Rubber itself is insulator.Conductive black is added in rubber, antistatic rubber and conductive rubber can be prepared.In rubber
Metal powder, especially silver powder or silver-plated powder are added in gum base materials, the better conductive rubber of electric conductivity can be made.By conduction
A kind of sequin that rubber prepares is used, and is a seed type of electric contact frequently referred to " conductive particle ".Due to conductive black and gold
Belonging to powder is dispersed distribution in conductive rubber, as conductive black and metal powder as conductive rubber made from filler, body
Product resistivity and surface resistivity are still bigger than common metal conductive material, and the ability that larger current is connected seems in certain occasions
Not enough.In order to further improve the electric conductivity of conductive rubber, technical staff is prepared for continuous metal material and rubber
Compound, the substitute as traditional conductive rubber.Application No. is 201010592410.1 patent document " composite conductings
Sheet material " discloses by macromolecule matrix and is compounded in the composite conducting strip that metal foil therein constitutes.Here metal foil is
Refer to nickel foil, copper foil, aluminium foil, stainless steel foil, goldleaf, silver foil or mesh grid containing hole, macromolecule matrix refer to silicon rubber,
Nitrile rubber, EP rubbers, natural rubber, rubber-plastics material, thermoplastic, thermosetting plastics or fibre reinforced plastics etc..
It is disclosed application No. is 201010609386.8 patent document " a kind of conductive rubber and its application " to be molded or injection system
By rubber and metallic fiber sintered felt (or metal non-woven fabrics) compound obtained conductive rubber, which has hole
Gap, the hole is at least partly by rubber filling.Application No. is 201110027418.8 patent document " rubber conductive particle and its systems
Preparation Method " discloses a kind of rubber conductive particle of the metal coating on rubber substrate and its surface, and metal coating can be one layer
Or several layers.Application No. is 201110193369.5 patent documents " pitted skin metal and rubber composite guide electrochondria " to disclose one kind
Pitted skin metal and rubber composite guide electrochondria, the conductive particle are bonded by metal faced with rubber matrix, or are cut after bonding
It forms.Metal faced is pitted skin, and there is pit, salient point or both to have.Chinese Patent Application No. 200680015484.0 " is led
Electrical contacts and its manufacturing method " and " the Electrically conducting contact and of U.S. Patent number 7964810
The document of method for production thereof " discloses the metal by least partly being permeated by elastomeric material
Electric contact made of sponge., all there is piece in the sheet-like composite of metal material obtained by the above patent document and rubber
Two surfacings of shape compound constitute different problem: a surface metal material of sheet-like composite is more, elastomer
Material is few or this surface is entirely metal material；And another surface metal material is few, elastomeric material is more or this
One surface is entirely elastomeric material.The inconsistent electric contact in this two surface, may be due to the electrical insulating property of elastomeric material
And the switching function of rubber key is failed.
The patent " the rubber conductive plate and conductive particle of multilayered structure " of application number 201110335410.8, disclose it is a kind of by
The rubber conductive plate and conductive particle for the multilayered structure that conductive layer, transition zone and elastic layer are combined.The conductive layer is fine and close gold
Belong to thin slice or sintered metal thin slice；Transition zone is thin polymer film or second layer compact metal thin slice；Elastic layer is sheet rubber
Material or rubber and plastic sheet material.The conduction of sheet-like composite obtained by the present invention is good, but two surface (conductive layer tables of sheet-like composite
Face and elastic layer surface), electric conductivity is entirely different.In rubber key production process, this sheet-like composite will and rubber
Key is combined together, as the electric contact of rubber key, at this time equally exist conductive layer surface in conjunction with rubber key and
The exposed risk as electric contact of elastic layer, the electrical insulating property of elastic layer make the switching function of rubber key fail.
Summary of the invention
Goal of the invention: electric contact is the critical component in key, it is commonly used to open with the contact of printed circuit board (PCB)
Pairing is closed to use.It must have low contact resistance.If contact resistance is excessive, it will result in key switch disabler, miss
Sentence.When the present invention is in order to overcome electric contact and printed circuit board contact switch contact, because of two surfaces of the electric contact of sheet
Material form it is inconsistent and caused by resistance is big or the hidden danger that is not turned on, the present invention provides a kind of porous gold of two or more layers
Belong to the composite sheet with high molecular material, electric contact is prepared by this composite sheet, it is ensured that the tool of the key as obtained by electric contact
There is reliable switching function.
Technical solution: the composite sheet of a kind of two or more layers porous metals and high molecular material is provided.Composite sheet
It is by two or more layers porous metals and high molecular material with the porous gold of porous metals-high molecular material-with a thickness of 0.1-5mm
What the lamellar composite mode of category was combined into, or with porous metals-high molecular material-porous metals or non-porous metal-high score
What the lamellar composite mode of sub- material-porous metals was combined into, wherein the hole in porous metals or gap are by macromolecule material
Material partly or entirely filling, the content of the high molecular material of composite sheet outer surface is less than the macromolecule material in composite inner
The content of the high molecular material of the content or even composite sheet outer surface of material is zero；The composite sheet, by overlapping, moving
Print, silk-screen, brushing, roller brushing, blade coating, spraying, dip-coating, showering, pumping painting mode, make polymer together with metal sheet simultaneously
Pressed or hot pressing and be made, or by thermoplastic molding's technique, thermosetting property moulding process, heat cure shaping technique or
Radiation curing technique curing molding and be made.The composite sheet is punched through machinery or two sides chemical group can be made in laser cutting
The small pieces for being 1-10mm at consistent or almost consistent circumscribed circle diameter；The small pieces are suitable as the electric contact of key.
Because two surface compositions of composite sheet or the electric contact as made from composite sheet are identical or almost the same, compound
The contact resistance on two surfaces of sheet material or electric contact is also identical or extremely close, so, when such electric contact is used as rubber
When the electric contact of key, no matter the switch contact exposed and with PCB of any surface of electric contact is contacted, generated contact resistance
It is identical or extremely close, thus may insure that rubber key switch will not fail or judge by accident.
Porous metals used in the present invention are metal mesh, sintered metal mesh, metal lath, metal foam, metallic fiber
Sintering felt, the metal sheet or their laminated composites for having multiple equally distributed or random distribution hole.Porous gold
Hole in category is independent or interconnected.These holes at least partially expose to the surface of porous metals.Hole
Cross section is round, ellipse, square, regular hexagon either Else Rule or irregular geometry, in hole
Circumscribed circle diameter be 1 μm of -2.5mm；Metal mesh and sintered metal net can be single-layer or multi-layer, metal mesh and metal lath
Also a kind of porous metals are made through specific vacuum sintering technology.
Non-porous metal in the present invention refers to the metal sheet of not hole, or the metal sheet of only closed pore.
Porous metals in the present invention be by aluminium, iron, cobalt, nickel, copper, zinc, tin, manganese, titanium, tungsten, silver, gold or they in it is any
What a kind of alloy of metal was constituted.It can preferred stainless steel, nickel or nickel alloy.This is because stainless steel, nickel or nickel in an atmosphere
Alloy is more stable, and cheap and easy to get.
The material of the inner surface of the outer surface and hole of porous metals used and the ontology material of porous metals are identical
Or it is different.Each layer of porous metals in obtained composite sheet, can be made of single metal material, can also be with
It is that multilayer material is combined.Specifically, the outer surface of porous metals and the inner surface of porous metals hole are that can have
The coat of metal, be to be coated with gold or billon more specifically.Such as gold-plated stainless steel cloth, copper mesh or nickel wire net etc. is all
It can be used when porous metals.Fitting has than stainless steel, copper or the more preferable chemical stability of nickel, conduction more better than stainless steel or nickel
Performance, electric contact can be improved conducts ability and service life.
Certainly, can also will the composite sheet as made from two or more layers porous metals and high molecular material, be punched into roundlet
After piece, then carry out gold-plated or chemical gilding.Gold-plated electric contact is prepared, golden consumption is less, and raw material cost is low.
The outer surface of the porous metals or the surface of hole are coated with bonding of the one layer of average thickness no more than 1 μm and increase
Into agent, coupling agent or silane coupling agent, to enhance the adhesive strength between porous metals.Adhesion promoter, coupling agent or the bottom applied
Paint cannot be too thick, otherwise the average thickness of coating or obviously increases the contact resistances of porous metals no more than 1 μm, thus
Influence the electric conductivity of the electric contact as material.Certainly, if high molecular material used itself has the bonding to metal
Property, with regard to without the pre-processing to being carried out inside the surface of porous metals and hole using adhesive, coupling agent or silane coupling agent.
High molecular material used in the present invention is thermoset rubber, thermoplastic elastomer (TPE), double faced adhesive tape, hot melt adhesive, glues
Mixture, transfer film, transfer glue, coating or ink.These high molecular materials are exactly based on, two or more layers porous metals are bonded
Together, composite sheet is formed, and then prepares electric contact.
One example of high molecular material used is the silicon rubber vulcanization glue prepared by firm silicone rubber or liquid silastic.
Further, high molecular material used is the silicon rubber containing conductive filler.Conductive filler is to contain conduction
Carbon black, metal powder, the inorganic powder for having the coat of metal, the glass marble for having the coat of metal, the glass fibre for having the coat of metal or
Metallic fiber, so that the conductive energy of silicon rubber, increases the conduction of composite sheet and the electric contact as made from composite sheet
Reliability.
Not only porous metals can be used to prepare the porous metals of two or more layers and the composite sheet of high molecular material, but also
Non-porous metal also is used as the middle layer of composite sheet.Such as the stainless steel substrates of 0.01-0.1mm thickness can be selected as multiple
Close the middle layer of sheet material.The effect of non-porous metal middle layer is enhancing composite sheet and the electric contact as made from composite sheet
Overall mechanical strength.
The utility model has the advantages that specific advantage of the invention is as follows:
(1) content of the outer surface metal component of the composite sheet obtained by the present invention is more, particularly suitable for preparing key
Electric contact.The present invention is in the recombination process of two or more layers porous metals and high molecular material, by a certain amount of macromolecule
Material, which is placed between porous metals, carries out pressing or heat cure bonding, high molecular material can be made to be evenly distributed on two or more layers
Between porous metals, and two outer surfaces of the composite sheet of resulting two or more layers porous metals and high molecular material, it is high
The content of molecular material does not exceed the macromolecule content of porous metals interlayer.
(2) composite sheet obtained in the present invention, not only the two sides material of sheet material forms, Er Qieyou identical with conductivity
Conducive to the following process of sheet material.High molecular material in the present invention, including silicon rubber can partly or entirely be full of porous metals
In hole or hole.In selected high molecular material, it is considered as the subsequent use of electric contact.Two or more layers porous metals and silicon
The compound electric contact of rubber, is suitable as the electric contact of silastic press key.This is because can be molded by heat cure, so that
The silicon rubber that become key matrix can be firmly combined with the electric contact of silicon rubber, the removing of electric contact and key matrix can
Reach the degree of cohesional failure.Silicon rubber plays a part of adhesive between porous metallic layers herein, while being also convenient for realizing electricity
The good bond of contact and silicone rubber matrix.Similarly, two or more layers porous metals and ethylene propylene diene rubber it is compound electricity touching
Point is suitable as the electric contact of ethylene propylene diene rubber key.
(3) composite sheet in the preparation present invention, selection is extensive, and cost is controllable.The present invention is in the porous gold of two or more layers
Belong to in the compound electric contact of high molecular material, it is the same for being not necessarily to the material of each layer porous metals.In multilayer knot
In the electric contact of structure, porous or non-porous metal intermediate layer can be used.As long as the contact electricity on two surfaces of composite sheet
Resistance is both less than setting value required by rubber key, also allows intermediate metal layer to use different with two metal outer materials more
Mesoporous metal or non-porous metal.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the electric contact of the embodiment of the present invention 1；
Fig. 2 is the diagrammatic cross-section of the electric contact of the embodiment of the present invention 2；
In figure, 1, porous metals；2, high temperature hot melt adhesive；3, porous metals；4, high temperature hot melt adhesive；5, non-porous metal.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Embodiment 1
The high temperature hot-melt film that one is prepared with a thickness of 0.05mm by epoxy modified acrylic resin is placed on two panels thickness
Degree is to press at 280 DEG C between the porous metals piece of 0.075mm, and composite sheet is made.The porous gold that the present embodiment uses
Belonging to piece is the stainless steel substrates for having equally distributed aperture is 0.5mm, the pitch of holes in adjacent two hole is 0.25mm hole, this some holes
The axis perpendicular in hole is in porous metals piece.By obtained composite sheet, it is punched into the sequin that diameter is 5mm.This roundlet
The material of two circular surfaces of piece be it is identical, the contact resistance of two circular surfaces is also identical.This sequin is made
It is compound with silicon rubber in such a way that heat cure bonds for electric contact, it can be prepared by the silastic press key of electric contact.Regardless of this
Which circular surface of kind sequin and silicon rubber bonding, the electric contact of obtained silastic press key is the same as between PCB switch contact
Contact resistance be all identical or extremely similar.
Also the hole that can be used same thickness is square, the stainless steel substrates substitution of regular hexagon or other geometries
The above-mentioned stainless steel substrates for having circular hole.Between the circumscribed circle diameter 0.25-2.5mm of these hole cross-sectionals, adjacent holes it
Between average distance between 0.1-1mm.Have electric contact obtained by the stainless steel substrates of these holes and PCB switch contact it
Between contact resistance, all between 0.8-1.2 Ω.By adjusting the distance between the size of hole and adjacent holes, can obtain
Antidusting to the stainless steel substrates of different flexibilities, thus obtained electric contact would also vary from.
Embodiment 2
Material used in embodiment 1 also uses in example 2.In order to increase composite sheet and later electricity obtained
The overall mechanical strength of contact places one between two layers of porous stainless steel disc with a thickness of the non-porous stainless steel of 0.075mm
Piece between non-porous stainless steel substrates and porous stainless steel disc, or with high temperature hot-melt film is bonded to composite sheet, and is punched to
The sequin of multiple diameter (such as 2mm, 2.5mm, 5mm, 10mm).This sequin equally can be used as electric contact for silicon rubber
In glue key.
Embodiment 3
The stainless steel substrates of 0.05mm thickness are impregnated in silicone rubber solution, it is equal on the two sides of stainless steel substrates with the mode of dip-coating
Coat the silicon rubber that one layer of thickness of dry film is 25-30 μm.The formula of silicone rubber solution is that silicon rubber (selects Germany in the present embodiment
The production of Wa Ke companyR401/60) 7.5g, vinyl silane tri-butyl peroxy (VTPS), 0.1g,
Dimethylbenzene 92.4g.Silicone rubber solution of the dip-coating on stainless steel substrates is dried at 70 DEG C, then, by the stainless steel wire of 40 mesh
Net, the nickel wire net of 40 mesh, the stainless steel fibre that the porosity of 0.15mm thickness is 80% is sintered felt, the porosity of 0.15mm thickness is
85% nickel foam, the hole diameter of 0.15mm thickness be 0.5mm, the nickel plate net that pitch of holes is 0.25mm, is superimposed on coating respectively
There is the two sides of the stainless steel substrates of silicon rubber, then on vulcanizing press, is pressed 10 minutes at 165 DEG C, obtain stainless steel substrates
The various composite sheets of enhancing.Then by these sheet materials, it is punched into the sequin that diameter is 2-5mm, is used as in silastic press key
Electric contact.Two extexines of obtained sequin, it is all metal material that material, which is consistent,.Silicone rubber material all positions
Under sequin extexine.Such sequin has reliable electric conductivity as electric contact.
Embodiment 4
Such as embodiment 1, but porous metals piece used is that the nickel content of 120 mesh is not less than 99.5% plain weave nickel wire net,
Or be coated on nickel wire average thickness be 1 μm gold content 99.9% or more Gold plated Layer 120 mesh plain weave nickel wire net.In nickel
Gold-plated purpose on silk screen is to conduct ability and use to reduce the surface contacted resistance of electric contact, increase electric contact
Service life.
Embodiment 5
By obtained sequin in embodiment 1,2 and 3, with the method for chemical plating, first plating a layer thickness is about 2 μ m-thicks
Nickel coating, then plate a layer thickness be 0.1 μm gold content be greater than 99.0% billon.The effect of Gold plated Layer is to drop
The sheet resistance or contact resistance of low sequin improve service life of the sequin as electric contact.
Embodiment 6
Use the nickel wire net in embodiment 4.An a certain amount of silicon rubber gross rubber (is contained into Dow Corning Corporation's silicon rubber
SE-4705U100 parts, DCP1 parts of peroxide vulcanizing agent) thin slice, it is placed between two panels nickel wire net, then puts it into die cavity
In, it is heated press cure 10 minutes at 175 DEG C, obtains the composite sheet of nickel wire net and silicon rubber that thickness is about 0.5mm.By
In the nickel wire net denser of 200 mesh, in sulfidation, silicon rubber will not or only penetrate nickel wire net on a small quantity.By this nickel
The composite sheet of silk screen and silicon rubber is punched into the sequin that diameter is 7.5mm, as electric contact and silicon rubber heat cure shaping,
The silastic press key containing electric contact is made.When this electric contact and gold-plated PCB switch contact contact, contact between the two
Resistance is about 0.3 Ω.
By in the nickel material on above-mentioned sequin surface, plating one layer of average thickness with the method for chemical plating is 0.1 μ m-thick
Gold content is not less than 99% Gold plated Layer.Chemical gilding only occurs in the nickel material on sequin surface, without in roundlet
In the silicone rubber material on piece surface.When this gold-plated electric contact and gold-plated PCB switch contact contact, contact between the two
Resistance is about 0.2 Ω.In the circuit of 300mA, the service life of gold-plated electric contact (is indicated, to contact electricity with on-off times
Resistance is greater than 1 Ω and is judged to failing, that is, reaches the service life upper limit) at 100,000 times or so, the corresponding service life of not gold-plated electric contact
It is then about 10,000 times, the service life of gold-plated electric contact obviously increases, and service life is about 50,000 times.
The present invention is not limited to the above-described embodiments, anyone can obtain other various forms under the inspiration of the present invention
Product, it is all that there is technical side identical or similar to the present application however, make any variation in its shape or structure
Case is within the scope of the present invention.
Claims (3)
1. a kind of composite sheet of multi-layer porous metal and high molecular material, it is characterised in that: the thickness of the composite sheet
It is to be answered by multi-layer porous metal and high molecular material with porous metals-high molecular material-porous metals stratiform for 0.1-5mm
Conjunction mode is combined into, or porous with porous metals-high molecular material-porous metals or non-porous metal-high molecular material-
What the lamellar composite mode of metal was combined into, wherein the hole in porous metals or gap are part or all of by high molecular material
Filling, the content of the high molecular material of composite sheet outer surface are less than the content of the high molecular material in composite inner；Institute
The composite sheet stated makes macromolecule by way of overlapping, bat printing, silk-screen, brushing, blade coating, spraying, dip-coating, showering, pumping painting
Material is together with metal sheet and is pressed and is made, or passes through thermoplastic molding's technique, thermosetting property moulding process, heat
Sulfidization molding technique or radiation curing technique curing molding and be made；The composite sheet is punched through machinery or laser cutting is made
Obtain the small pieces that chemical composition consistent circumscribed circle diameter in two sides is 1-10mm；The small pieces are used as the electric contact of key；
The metal sheet or their stratiform that the porous metals are metal mesh, metallic fiber sintered felt, hole are distributed
Compound；Hole in the porous metals is independent or interconnected；The hole at least partially exposes to
The surface of porous metals；The cross section of described hole is round, quadrangle or regular hexagon, the circumscribed circle diameter of hole is 1 μm-
2.5mm；The non-porous metal is the metal sheet of no hole or only closed pore；
The porous metals are by aluminium, iron, cobalt, nickel, copper, zinc, tin, manganese, titanium, tungsten, silver, gold or any one metal in them
Alloy；
The outer surface of the porous metals or the inner surface of porous metals hole are coated with one layer for improving porous metals and height
The average thickness of adhesiveness is not more than 1 μm of adhesion promoter, coupling agent or silane coupling agent between molecular material；
The high molecular material be thermoset rubber, thermoplastic elastomer (TPE), double faced adhesive tape, adhesive, transfer film, transfer glue,
Coating or ink；
The non-porous metal is the stainless steel substrates of 0.01-0.1mm thickness.
2. the composite sheet of multi-layer porous metal and high molecular material according to claim 1, it is characterised in that: described
High molecular material is silicon rubber；The silicon rubber is prepared by firm silicone rubber or liquid silastic.
3. the composite sheet of multi-layer porous metal and high molecular material according to claim 1, it is characterised in that: described
High molecular material is the rubber containing conductive filler, and the conductive filler is conductive black, metal powder or has the coat of metal
Inorganic powder, the glass marble for having the coat of metal, the glass fibre or metallic fiber for having the coat of metal.
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| CN201610798351.0A CN106393873B (en) | 2016-08-30 | 2016-08-30 | A kind of composite sheet of multi-layer porous metal and high molecular material |
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| CN108000977A (en) * | 2018-01-03 | 2018-05-08 | 梧州三和新材料科技有限公司 | A kind of Multi-layer graphite piece highly heat-conductive material with foam metal interlayer and preparation method thereof |
| CN109494084B (en) * | 2018-11-15 | 2021-04-09 | 深圳市登科硅橡胶制品有限公司 | Conductive part for switch, button switch and conductive part manufacturing method |
| JP7195178B2 (en) * | 2019-02-27 | 2022-12-23 | 信越ポリマー株式会社 | Contact member and manufacturing method thereof |
| CN109920661A (en) * | 2019-03-15 | 2019-06-21 | 东莞市诒茂电子科技有限公司 | Double-sided metal mesh conductive particle and key with same |
| CN111916259B (en) * | 2020-08-04 | 2021-07-06 | 东莞市雷兹盾电子材料有限公司 | A kind of preparation method of supersoft conductive rubber and supersoft conductive rubber |
| CN112259386B (en) * | 2020-09-30 | 2023-09-08 | 南通万德科技有限公司 | Rubber and metal composite electric contact and preparation method thereof |
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| DE4434217A1 (en) * | 1994-09-26 | 1996-03-28 | Duerrwaechter E Dr Doduco | Semi-finished or finished part made of a layered material for purposes of electrical power conduction and / or electrical contact |
| ATE503254T1 (en) * | 1999-08-31 | 2011-04-15 | Teijin Ltd | TRANSPARENT CONDUCTIVE MULTI-LAYER BODY AND TOUCH-SENSITIVE SCREEN PROVIDED WITH IT |
| CN104103433B (en) * | 2014-07-21 | 2016-02-17 | 南通万德科技有限公司 | Switch contact of a kind of arc ablation resistance and preparation method thereof |
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