JP6764030B2 - Composite material and its manufacturing method - Google Patents

Description

The present invention relates to the field of composite materials, more particularly to composite conductive materials of metal and rubber, which composite materials can be used to make electrical contacts for conductive plates and rubber buttons.

It is well known that the conductivity of a metallic material is generally much greater than the conductivity of a conductive polymer produced by filling a polymer substrate with a dispersive conductive filler. The conductive polymer is, for example, a filled conductive plastic, a conductive rubber, a conductive paint, a conductive ink, a conductive adhesive and the like. Dispersible conductive fillers include conductive carbon black, carbon nanotubes, graphene, metal powder, metal-plated powder or microbeads, metal fibers, metal-plated fibers, carbon fibers and the like.

To date, not all conductive rubbers are unique, as the various rubbers themselves are electrically insulating, and all conductive rubbers are composed of insulating rubber and conductive filler materials. Antistatic rubber and conductive rubber can be produced by adding conductive carbon black into the rubber. By adding a metal powder, particularly silver powder or silver-plated powder, to the rubber base material, a conductive rubber having better conductivity can be obtained. Since the conductive carbon black and the metal powder are dispersed in the conductive rubber, the conductive rubber obtained by using the conductive carbon black and the metal powder as a filler is a metal conductive material having a normal volume resistivity and surface resistivity. The ability to carry larger and higher currents is not sufficient in some situations.

To further improve the conductivity of conductive rubber, those skilled in the art have produced continuous metal materials and rubber composites in place of conventional conductive rubber. The "composite conductive sheet" of Patent Document 1 (Chinese Patent Application No. 201010592410.1) discloses a composite conductive sheet composed of a polymer matrix and a metal foil blended therein. The metal foil referred to here refers to a woven cloth mesh containing nickel foil, copper foil, aluminum foil, stainless steel foil, gold foil, silver foil, or pores, and the polymer matrix refers to silicone rubber, nitrile rubber, ethylene propylene rubber, and the like. It refers to natural rubber, rubber plastic material, thermoplastic plastic, thermosetting plastic or fiber reinforced plastic. In "Conductive rubber and its application" of Patent Document 2 (Chinese Patent Application No. 201010609386.8), rubber and metal fiber sintered felt (or metal non-woven fabric) are blended by molding or injection to obtain conductive rubber. Is disclosed, the metal fiber sintered felt has holes that are at least partially filled with rubber. Patent Document 3 (Chinese Patent Application No. 2011110027418.8) discloses "rubber conductive particles and a method for producing the same", which discloses rubber conductive particles of a rubber base material and a metal plating film on the surface thereof. It may be one layer or several layers. US Pat. It is disclosed.

When the above composite material of continuous metal material and rubber is used as an electrical contact, the coefficient of thermal expansion of rubber is 10 times or more that of a general metal material. Therefore, when the temperature rises, the rubber in these composite materials Due to its large coefficient of thermal expansion, it protrudes from the surface of the composite, resulting in high surface contact resistance of the electrical contacts, and even the electrical contacts become non-conductive and can become completely non-functional. In fact, when such electrical contact buttons are used in a vehicle, they can pose a safety issue.

Therefore, there is an urgent need by the manufacturing industry for a method of effectively solving the high temperature failure problem of electrical contacts manufactured from composites of rubber and continuous metal materials.

Chinese Patent Application Publication No. 102169760 Chinese Patent Application Publication No. 102176341 Chinese Patent Application Publication No. 102623196 Chinese Patent Application Publication No. 101171654 U.S. Pat. No. 7964810

The present invention provides a composite material of a porous metal and rubber and a method for producing the same, which is suitable for making an electric contact that does not break down even under a severe temperature change.

Electrical contacts are an important component of rubber buttons and are typically used in combination with a printed circuit board (PCB) contact switch. It must have low contact resistance. If the contact resistance is too large, it is erroneously determined whether the key switch function is disabled.

The following are examples of impaired electrical contact conduction function. When a composite material made from rubber and metal mesh is used as an electrical contact on a rubber button, the phenomenon of rubber swelling and swelling appears when the temperature rises from room temperature to higher temperatures such as 80 ° C. (See FIG. 1), the contact resistance rises from 0.4Ω to 2Ω or more, and the electrical contact completely loses the conduction function, which causes misjudgment or failure when the switch is pressed. The rubber swells because the coefficient of thermal expansion of the rubber is large. For example, the coefficient of thermal expansion of silicone rubber is about 15 times that of metallic nickel.

The present invention discloses a composite material and a method for producing the same.

A rubber or porous metal containing a solvent or volatile substance is heat vulcanized or radiocured to have a thickness of 0.01-10 mm, with both the metal and rubber materials on at least one surface. Form an exposed composite material. The pores in the porous metal in the composite material partially or completely fill the rubber during hot vulcanization or radiation curing to achieve cross-linking or solidification of the rubber. The composite is then placed at room temperature or under vacuum and baked or vacuum baked to vaporize or volatilize the solvent or volatiles therein, whereby the rubber phase in the composite shrinks and disintegrates. As a result, the metal material in the composite material projects from at least one surface of the composite material.

In the production of the above composite material, it is necessary to select a solvent or a volatile substance that does not chemically react with the rubber used. Solvents and volatiles must not undergo cross-linking or decomposition reactions in rubber.

The porous metal in the present invention refers to a metal plate having a plurality of holes uniformly or randomly distributed, a metal mesh, a sintered metal mesh, a metal lath, a metal foam, a metal fiber sintered felt, or the like. Refers to a multi-layer metal structure containing. The metal mesh and the sintered metal mesh may be a single layer or a plurality of layers, and the metal mesh and the metal lath are also formed into a porous metal by a specific vacuum sintering method. Since the pores in the porous metal are independent or interconnected, and at least part of the pores are exposed on the surface of the porous metal, the liquid or solid rubber penetrates into the pores. be able to. The holes may have a regular cylindrical shape, for example, all holes in the metal lath may have a diameter of 0.25 mm or may be irregular. The diameter of the cross-sectional area of the hole may be in the range of 1 um to 3.0 mm.

For example, porous metals are metal laths with uniformly distributed pores, pore diameters of 50 um to 0.5 mm, pore spacing of 25 um to 1.0 mm, and circular, regular polygonal or other geometric shapes. Can be.

The material of the porous metal may be various metals. The porous metal can be composed of aluminum, iron, cobalt, nickel, copper, zinc, tin, titanium, manganese, tungsten, silver, gold or alloys thereof. Examples of the alloy include Hastelloy, Monel, Inconel and the like. Here, stainless steel, nickel or nickel alloy is preferable. This is because stainless steel, nickel or nickel alloys have relatively stable chemistry at room temperature and are inexpensive and readily available.

Porous metals consist of homogeneous or heterogeneous metal materials. Further, the outer surface of the porous metal and its pores may be metal-plated, and the metal-plated layer may cover all or part of the surface of the porous metal and the inner surface of the porous metal pores. Here, gold plating or silver plating is preferable. Gold and silver have relatively good conductivity, and as an outer layer plating of metallic materials, they improve the surface conductivity of electrical contacts, reduce the contact resistance of electrical contacts, and the conductivity and durability of electrical contacts. The number of years can be improved.

In order to increase the adhesive strength between the porous metal and the rubber, the outer surface of the porous metal or the inner surface of the pores may be coated with an adhesion promoter, coupling agent or primer having an average thickness of 1 μm or less. Adhesion promoters, coupling agents or primers should not be too thick, and the average thickness of the coating should not exceed 1 μm. Otherwise, the contact resistance of the porous metal will increase significantly, thereby affecting the conductivity of the electrical contacts.

Not only various porous metals but also rubber can be widely used. To prepare a conductive composite using each of diene-based liquid rubber, olefin-based liquid rubber, polyurethane-based liquid rubber, acrylate-based liquid rubber, liquid polysulfide rubber, silicon-based liquid rubber, and fluorine-based liquid rubber and a porous metal. Can be done. The reason for selecting liquid rubber is that the viscosity of liquid rubber is lower than the viscosity of solid raw rubber, which facilitates the blending of rubber and porous metal by various methods. However, this does not mean that solid raw rubber is not available. In some methods, solid raw rubber and porous metal can be combined, for example, solid raw rubber and porous metal (such as metal lath) are stacked together and then placed in a mold cavity and flattened. Pressurize with a vulcanizer. Solid raw rubber is infiltrated into the pores of the porous metal, and the solid raw rubber and the porous metal are combined and vulcanized at a high temperature.

Subsequent use of these composites should be considered when choosing the type of rubber. When these composites are used to make electrical contacts on rubber buttons, which rubber to achieve good adhesion between the electrical contacts and the button substrate during heat vulcanization or radiation curing. Should be understood if is used for rubber buttons. For example, electrical contacts made from composites made from liquid or solid nitrile rubber and sintered nickel mesh are suitable for making nitrile rubber buttons and made from liquid or solid silicone rubber and stainless steel mesh. Composite electrical contacts are suitable for the manufacture of silicone rubber buttons, and composite electrical contacts made from liquid or solid fluororubber and nickel fiber sintered felt are suitable for the manufacture of silicone rubber buttons. Are suitable.

Conductive composites can be produced not only from conventional thermosetting or room temperature curable liquid rubbers and porous metals, but also from radiation curable liquid rubbers or viscous mixtures and porous metals. The liquid rubber or viscous mixture can be cured by ultraviolet light or electron beam. Preferably, the polymer material is silicone rubber.

Silicone rubber is a common material for rubber buttons, and electrical contacts made from a composite material made of silicone rubber porous metal are very suitable as electrical contacts for silicone rubber buttons.

The rubber formulation may include various auxiliaries such as pigments, fillers or conductive fillers. Unlike a general rubber formulation, one important point in the present invention is that a solvent or volatile substance must be added to the rubber formulation. These solvents or volatiles are rubber-compatible or partially compatible volatile solvents, liquids or solids or mixtures of these materials. At room temperature, high temperature, vacuum or high temperature vacuum, volatile solvents, liquids or solids can all be used in rubber formulations.

Common solvents such as various hydrocarbons (solvent gasoline, petroleum ether, benzene, toluene, xylene, trimethylbenzene, tetramethylbenzene, mixed aromatics, etc.), halogenated hydrocarbons, alcohols, ethers, ketones, esters, etc. Some plasticizers (such as dibutyl phthalate), softeners (such as aromatic hydrocarbon oils, naphthenic oils), some monomers, such as nitrogen and sulfur-containing solvents (such as N, N-dimethylformamide, dimethylsulfoxide, etc.) Intermediates (eg, lactam, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane) and the like can also be added to the rubber formulation.

For example, the volatiles can be iodine, sulfur, p-dichlorobenzene, phenol, adamantane, naphthalene, anthracene, phenanthrene, camphor, menthol, caffeine. Iodine, sulfur and these organic compounds are solid at room temperature and have a higher boiling point, but are sublimable. In addition, it may be volatilized from rubber under the conditions of being left at room temperature for a long time, being placed in a vacuum, being baked, or being vacuum baked. Baking or vacuum accelerates their sublimation. Therefore, these sublimable compounds can also be added to the rubber formulation, and their sublimation causes the rubber in the composite to shrink and disintegrate. It should be noted that the addition of solvents or volatile substances that may chemically react with the rubber should be avoided. For example, the addition of sulfur as a volatile substance to diene rubber should be avoided. This is because large amounts of sulfur make rubber hard and brittle after heat vulcanization.

A solvent having a boiling point higher than the heat vulcanization molding temperature of rubber is well suitable for rubber compounding in heat vulcanization molding. In the case of rubbers that require secondary vulcanization, such as silicone rubber and fluororubber, the boiling point of the solvent used may be higher than the thermal vulcanization molding temperature and lower than the secondary vulcanization temperature.

The polarity and solubility parameters of the solvent or volatiles used in the rubber formulation should be the same or similar to the polarity and solubility parameters of the rubber in the rubber formulation and, as a result, the solvent or volatile used. Even if a solvent or volatile substance volatilizes from the rubber, the rubber is still dense or has open or closed holes that are visible to the naked eye, just as the substance is compatible or partially compatible with the rubber. Absent. For example, liquid paraffin, trimethylbenzene and naphthalene can be used in natural rubber. In the formulation of styrene-butadiene rubber, phenol can be used in the formulation of nitrile rubber with a high nitrile content. Hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane can be used in the formulation of silicone rubber.

The purpose of adding these solvents or volatiles to rubber formulations is not to allow them to play a specific role in the rubber after heat vulcanization or radioforming, but to rubber them after heat vulcanization or radioforming. This is to expel the rubber in the composite material of the porous metal and the rubber, causing the rubber in the pores of the porous metal in the composite material to shrink and collapse.

There are various methods for producing composite materials in the present invention, such as lamination, pad printing, silk screen printing, brush coating, roller coating, blade coating, spray coating, dip coating, shower coating and draw coating. Both the metal material and the rubber having a thickness of 0.01 to 10 mm are bonded to the uncrosslinked rubber containing the sex substance and the porous metal, and then crosslinked or solidified by hot vulcanization molding or radiation curing molding. Form a composite material exposed simultaneously on at least one surface. The resulting composite is then placed at room temperature or under vacuum and fired or vacuum fired to evaporate or volatilize the solvent or volatiles therein, thereby causing the rubber phase in the composite to evaporate or volatilize. It shrinks and collapses, causing the metal material to protrude from the surface of the composite material.

The heat vulcanization molding is to form an uncrosslinked rubber and a porous metal combined in a mold by pressing them at a temperature higher than room temperature to cause a crosslinking reaction of the rubber. Radiation curing molding is to form uncrosslinked rubber and porous metal in a mold by crosslinking the rubber by ultraviolet irradiation and electron beam irradiation. When using radiation curing molding, the mold should have a constant permeability to UV or electron beam radiation.

The composite material described in the present invention can be punched into a small circular sheet having a diameter of 1.0 to 10.0 mm, which has good conductivity and contact resistance of less than 1Ω. , Can be used as an electrical contact for rubber buttons. The surface of the electrical contacts made of the composite material shrinks and collapses, causing the porous metal material to protrude, resulting in the electrical contacts having good dust and oil resistance. And it has good electrical conductivity when the temperature rises. Although the coefficient of thermal expansion of a rubber material is generally much larger than the coefficient of thermal expansion of a metal material, the shrinkage and collapse of the rubber in the composite material can offset the thermal expansion of the rubber material due to the large coefficient of thermal expansion of the rubber.

FIG. 5 is a schematic view according to an embodiment of the present invention, in which rubber protrudes from the surface of a composite material manufactured from rubber and a metal plate mesh when the temperature rises. In the figure, 1 is rubber and 2 is a metal plate mesh. It is sectional drawing which shows the 1st structure which concerns on embodiment of this invention. The shrinkage of the rubber in the composite material of the benzene-containing ethylene propylene diene rubber and the pure nickel plate mesh by vacuum firing is shown. In the figure, 3 is a pure nickel plate mesh, and 4 is ethylene propylene diene rubber. It is sectional drawing which shows the 2nd structure which concerns on embodiment of this invention. The shrinkage of the rubber in the composite material of benzene-containing ethylene propylene diene rubber and pure nickel mesh by vacuum firing is shown. In the figure, 5 is ethylene propylene diene rubber, and 6 is a pure nickel plate mesh. It is sectional drawing which shows the 3rd structure which concerns on embodiment of this invention. At high temperatures, ethylene propylene diene rubber does not protrude from the surface of the composite material. The dotted line in the figure is the position of the rubber surface in the hole of the pure nickel mesh before heating. In the figure, 7 is ethylene propylene diene rubber, and 8 is a pure nickel plate mesh.

The present invention will be further described below together with specific embodiments.

(First Embodiment)
Formulation 1 (each component is by weight; the same applies below) contains ethylene propylene diene rubber 100, zinc oxide 5, stearic acid 1, antioxidant RD 1.8, antioxidant D 0.5, carbon black. N762 65, benzene (1,2,4,5-Tetramethylbene) 50, cross-linking agent DCP 2, and co-cross-linking agent TAC 1.5.

Formulation 2 is the same as Formulation 1 except that benzene is not added.

A pure nickel plate mesh (nickel purity of 99.0% or more) having a thickness of 0.25 mm, a hole diameter of 0.5 mm, and a hole spacing of 0.25 mm was mixed with a diluted tackifier Chemmok 205 (manufactured by Lot, a US company). Undercoat. The mixed rubber films of Formulation 1 and Formulation 2 were respectively superposed on a primer-treated pure nickel plate mesh, placed in a mold cavity, and vulcanized under the conditions of 175 ° C. × 10 minutes to have a thickness of 0. A .25 mm sheet was formed. Then, the sheet was vacuum-baked at 150 ° C. for 6 to 12 hours until the weight of the sheet became substantially constant to obtain a composite sheet of nickel and ethylene propylene diene rubber. The composite material obtained from Formulation 1 does not shrink or the degree of shrinkage is negligible under vacuum baking. Compared with the composite sheet obtained from Formulation 2, the surface of the composite sheet obtained from Formulation 1 shrinks the rubber in the metal pores as shown in FIG. 2 due to the evaporation of benzene during vacuum baking. And collapse.

Thicker composite sheets can also be manufactured. A 0.25 mm thick primer-treated pure nickel mesh was placed at the bottom of the mold cavity, then the mixed rubber of Formulation 1 was added and vulcanized under the conditions of 175 ° C. × 10 minutes to form a thickness of 1. A 0 mm sheet was prepared. Similarly, the sheet was vacuum baked at 150 ° C. for 6-12 hours until the weight of the sheet was substantially constant to give a composite sheet of nickel and ethylene propylene diene rubber, as shown in FIG.

Each of the above two sheets was punched into a small circular sheet having a diameter of 3.0 mm as an electric contact of an ethylene propylene diene rubber button. The switch life test was performed under the conditions of high and low temperature alternating at -40 ° C to 80 ° C with an operating current of 50 mA. The electrical contacts manufactured by Formulation 1 were found to have good conductivity at room temperature, low temperature or high temperature. On the other hand, the button manufactured by Formulation 2 may have a large resistance or become non-conducting at a high temperature. This is because the first shrunk rubber in the pores of the pure nickel plate mesh of the composite material made from the rubber of Formula 1 at high temperature expanded but did not protrude from the surface of the composite material, as shown in FIG. Is.

(Second Embodiment)
Silicone rubber and peroxide were dissolved in xylene to form a fluid solution. The formulation of the solution is silicone rubber SE 4705U (manufactured by Dow Corning Corporation, USA) 100, peroxide BPO 2, and xylene 300.

The porous metal used in this embodiment is manufactured by a 5-layer 80 mesh AISI 304 stainless steel wire plain weave mesh via a special lamination press and vacuum sintering process. The porous metal was treated with a toluene solution of 5% vinyl tri-tert-butyl peroxide (VTPS). The above silicone rubber solution was coated on the porous metal by a scraping method, and the silicone rubber solution was allowed to penetrate into the pores of the porous metal to fill the pores of the porous metal. Next, it was placed in a porous metal mold cavity filled with a silicone rubber solution and vulcanized at 115 ° C. for 10 minutes to form a 1.0 mm thick sheet. Then, the obtained sheet was baked at 130 ° C. for 300 minutes to volatilize the xylene inside to obtain a composite material composed of a porous metal and silicone rubber. On one side of the resulting composite sheet, the rubber shrinks inward of the material, and the stainless steel material protrudes from the surface. This composite material can be used as a conductive material for electrical contacts having good high temperature conductivity for the production of silicone rubber buttons.

(Third Embodiment)
Similar to Embodiment 2, but prior to using the multilayer metal sintered mesh, the surface and the inner surface of the pores were plated with gold having an average thickness of 0.1-0.3 μm. The purity of gold is 99.0% or higher.

(Fourth Embodiment)
Similar to the second embodiment, after forming a composite material of the porous metal and the silicone rubber, 0.1 to 0.3 μm of gold was plated on the metal exposed on the surface of the composite material. Compared to the third embodiment, the composite material or electrical contact obtained in the present embodiment consumes less gold, and the surface contact resistance of the composite material or electrical contact is the composite material or electrical contact manufactured in Example 3. It was substantially the same as or similar to the surface contact resistance of electrical contacts.

(Fifth Embodiment)
After dissolving naphthalene in trimethylbenzene, silicone rubber and peroxide were kneaded to produce a rubber compound. The formulation of the rubber compound is SE 4705U Silicone Rubber 100, 2,5-dimethyl-2,5-bis (benzoylperoxy) hexane 1, naphthalene 20, trimethylbenzene 80. And three kinds of porous metals were used. That is, (1) purity 99% or more, mesh size 100 mesh, thickness 0.5 mm ordinary nickel mesh, (2) purity 99% or more, porosity 96% or more, open porosity 99% or more, elongation in all directions. Nickel foam with a rate of 5% or more, an average pore diameter of 300 μm and a thickness of 1.0 mm, (3) Absolute filtration accuracy of 60 μm, porosity of 87%, unit area weight of 750 g / m ² , stainless steel fiber sintering with a thickness of 0.7 mm It is a felt. The porous metal may be treated with a coupling agent such as vinyltri-tert-butylperoxysilane or an adhesion enhancer (eg, Wacker Chemie AG's ELASTOSIL AUX G 3242) prior to blending with the rubber compound. Each of the above rubber compounds was laminated with three types of porous metals, placed in a mold cavity, and pressed at 150 ° C. for 10 minutes to prepare a sheet having a thickness of 1.0 mm. Then, it was baked at 160 ° C. for 1 hour and at 200 ° C. for 2 hours to obtain a composite material of three kinds of porous metals and silicone rubber. These composite materials were separately punched into a small circular sheet having a diameter of 3.0 mm, and the surface of the small circular sheet containing a large amount of rubber material was heat-vulcanized with silicone rubber to produce a silicone rubber button including electrical contacts. The electrical contacts of these buttons have good conductivity under high temperature conditions. It was conductive at low temperatures and room temperature, but the resistance did not increase or become non-conducting at high temperatures (eg 85 ° C.).

The present invention is not limited to the preferred embodiment described above, and other forms of the product can be derived by any form of the present invention. However, technical solutions that are the same as or similar to this application, regardless of their shape or structure, are within the scope of the invention.

(Additional note)
(Appendix 1)
A rubber or porous metal containing a solvent or volatile material is heat vulcanized or radiocured to have a thickness of 0.01-10 mm, with both the metal and rubber materials exposed on at least one surface. Form a composite material to
The pores in the porous metal in the composite are partially or completely filled with rubber during hot smelting or radiation curing to achieve cross-linking or solidification of the rubber and then the composite at room temperature. Or place under vacuum and bake or vacuum bake to vaporize or volatilize the solvent or volatiles in it, causing the rubber in the composite to shrink and disintegrate, resulting in the metal in the composite. The material protrudes from at least one surface of the composite and
The solvent or volatile substance does not chemically react with rubber,
A composite material characterized by that.

(Appendix 2)
The porous metal is a metal sheet having a plurality of holes, a metal mesh, a sintered metal mesh, a metal lath, a metal foam or a metal fiber sintered felt, or a layered composite material thereof.
The pores are independent or interconnected, the pores are at least partially exposed on the surface of the porous metal, and the pore diameters are 1 μm to 3.0 mm.
The composite material according to Appendix 1, wherein the composite material is characterized by the above.

(Appendix 3)
The porous metal is a metal lath in which the pores are uniformly distributed, the pore diameter is 50 μm to 0.5 mm, the pore spacing is 25 μm to 1.0 mm, and the pore pattern is circular, regular polygon, or other geometric shape.
The composite material according to Appendix 1 or 2, characterized in that.

(Appendix 4)
The porous metal comprises aluminum, iron, cobalt, nickel, copper, zinc, tin, titanium, manganese, tungsten, silver, gold or alloys thereof.
Porous metal does not contain a metal plating layer or contains a metal plating layer,
The metal plating layer completely or partially covers the surface of the porous metal and the inner surface of the porous metal pores.
The composite material according to Appendix 1 or 2, characterized in that.

(Appendix 5)
The surface of the porous metal and the inner surface of the pores are coated with an adhesion promoter, coupling agent or primer having an average thickness of 1 μm or less.
The composite material according to Appendix 1, wherein the composite material is characterized by the above.

(Appendix 6)
The rubber is produced from a diene-based liquid rubber, an olefin-based liquid rubber, a polyurethane-based liquid rubber, an acrylate-based liquid rubber, a liquid polysulfide rubber, a silicon-based liquid rubber, a fluorine-based liquid rubber, or a corresponding solid raw rubber.
The composite material according to Appendix 1, wherein the composite material is characterized by the above.

(Appendix 7)
The rubber is made from a radiation curable liquid rubber or a viscous mixture.
The composite material according to Appendix 1, wherein the composite material is characterized by the above.

(Appendix 8)
The solvent or volatile substance is a rubber-compatible or partially compatible solvent, a volatile liquid, a volatile solid, or a mixture thereof.
The composite material according to Appendix 1, wherein the composite material is characterized by the above.

(Appendix 9)
The solvent or volatile substance is iodine, sulfur, p-dichlorobenzene, phenol, adamantane, naphthalene, anthracene, phenanthrene, camphor, menthol, or caffeine.
The composite material according to Appendix 1 or 8, characterized in that.

(Appendix 10)
A method for producing the composite material according to Appendix 1.
Combine uncrosslinked rubber containing solvents or volatiles with porous metal by lamination, pad printing, silkscreen printing, brush coating, roller coating, blade coating, spray coating, dip coating, shower coating or draw coating. Then, by heat vulcanization molding or radiation curing molding, they are crosslinked or solidified to form a composite material in which both a metal material having a thickness of 0.01 to 10 mm and rubber are simultaneously exposed on at least one surface. ,
The resulting composite is then placed at room temperature or under vacuum and baked or vacuum baked to evaporate or volatilize the solvent or volatile material therein, thereby causing the rubber in the composite to shrink. And collapse, the metal material protrudes from the surface of the composite material,
The heat vulcanization molding is to form an uncrosslinked rubber and a porous metal combined in a mold by pressing them at a temperature higher than room temperature to crosslink the rubber.
In the radiation curing molding, the uncrosslinked rubber and the porous metal in the mold are formed by cross-linking the rubber by ultraviolet irradiation and electron beam irradiation.
A method for producing a composite material.

Claims (8)

Rubber and porous metals containing solvents or volatiles are heat vulcanized or radiocured to have a thickness of 0.01-10 mm, with both the metal and rubber materials exposed on at least one surface. Form a composite material to
The pores in the porous metal in the composite are partially or completely filled with rubber during hot smelting or radiation curing to achieve cross-linking or solidification of the rubber and then the composite at room temperature. Or place under vacuum and bake or vacuum bake to vaporize or volatilize the solvent or volatiles in it, causing the rubber in the composite to shrink and disintegrate, resulting in the metal in the composite. The material protrudes from at least one surface of the composite and
The Solvent or volatile substances without rubber chemically react,
The pore size of the porous metal is 50 μm to 0.5 mm.
The rubber is produced from a diene-based liquid rubber, an olefin-based liquid rubber, a polyurethane-based liquid rubber, an acrylate-based liquid rubber, a liquid polysulfide rubber, a silicon-based liquid rubber, a fluorine-based liquid rubber, or a corresponding solid raw rubber.
A composite material characterized by that. The porous metal is a metal sheet having a plurality of holes, a metal mesh, a sintered metal mesh, a metal lath, a metal foam or a metal fiber sintered felt, or a layered composite material thereof.
The hole has or interconnected independent, the pores Ru Tei exposed to at least partially the surface of the porous metal,
The composite material according to claim 1. The porous metal is a metal lath in which the pores are uniformly distributed , the pore spacing is 25 μm to 1.0 mm, and the pore pattern is circular, regular polygon, or other geometric shape.
The composite material according to claim 1 or 2. The porous metal comprises aluminum, iron, cobalt, nickel, copper, zinc, tin, titanium, manganese, tungsten, silver, gold or alloys thereof.
Porous metal does not contain a metal plating layer or contains a metal plating layer,
The metal-plated layer completely or partially covers the surface of the porous metal and the inner surface of the porous metal pores.
The composite material according to claim 1 or 2. The surface of the porous metal and the inner surface of the pores are coated with an adhesion promoter, coupling agent or primer having an average thickness of 1 μm or less.
The composite material according to claim 1. The solvent or volatile substance is a rubber-compatible or partially compatible solvent, a volatile liquid, a volatile solid, or a mixture thereof.
The composite material according to claim 1. The solvent or volatile substance is iodine, sulfur, p-dichlorobenzene, phenol, adamantane, naphthalene, anthracene, phenanthrene, camphor, menthol, or caffeine.
The composite material according to claim 1 or 6 , characterized in that. The method for producing the composite material according to claim 1.
Lamination, pad printing, silk screen printing, brushing, roller coating, blade coating, spray coating, dip coating, a technique of shower coating or draw coating, and uncrosslinked rubber and a porous metal containing Solvent or volatile substances Combined and then crosslinked or solidified by heat vulcanization or radiation curing to form a composite material with both 0.01-10 mm thick metal and rubber exposed simultaneously on at least one surface. And
The resulting composite is then placed at room temperature or under vacuum and baked or vacuum baked to evaporate or volatilize the solvent or volatile material therein, whereby the rubber in the composite shrinks. And collapse, the metal material protrudes from the surface of the composite material,
The heat vulcanization molding is to form an uncrosslinked rubber and a porous metal combined in a mold by pressing them at a temperature higher than room temperature to crosslink the rubber.
In the radiation curing molding, the uncrosslinked rubber and the porous metal in the mold are formed by cross-linking the rubber by ultraviolet irradiation and electron beam irradiation.
A method for producing a composite material, which is characterized in that.