CN110894359B - Sponge type directional conductive rubber and preparation method thereof - Google Patents
Sponge type directional conductive rubber and preparation method thereof Download PDFInfo
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- CN110894359B CN110894359B CN201911235165.6A CN201911235165A CN110894359B CN 110894359 B CN110894359 B CN 110894359B CN 201911235165 A CN201911235165 A CN 201911235165A CN 110894359 B CN110894359 B CN 110894359B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
Abstract
The invention relates to the field of conductive rubber, in particular to sponge type directional conductive rubber and a preparation method thereof, which comprises the steps of adopting liquid foaming silicone rubber as a rubber matrix, the liquid foaming silicon rubber comprises auxiliary agents such as a foaming agent, a vulcanizing agent, color paste and the like, the rubber matrix forms a spongy structure after vulcanization, the sponge type directional conductive rubber has the advantages of low density, good flexibility, good corrosion resistance, stable electrical property and the like, the electromagnetic shielding material can be popularized and applied to the fields of consumer electronics, military communication, aerospace and the like, and the electromagnetic shielding function of products is realized.
Description
Technical Field
The invention relates to the field of conductive rubber, in particular to sponge type directional conductive rubber and a preparation method thereof.
Background
The conductive rubber is a conductive functional material prepared by mixing a conductive filler with a rubber matrix and then vulcanizing and molding, wherein the conductive rubber prepared by filling silicon rubber with silver-plated metal powder serving as the conductive filler is industrially applied, has the volume resistivity of less than or equal to 0.01 omega cm, has the characteristics of high and low temperature resistance and corrosion resistance of the silicon rubber, and is widely applied to the fields of aerospace, automobile industry, consumer electronics, military communication and the like which need electromagnetic protection.
The traditional conductive image rubber product is compounded by a rubber base material, conductive fillers (comprising metal silver powder, carbon black, silver-plated aluminum powder, nickel-plated graphite powder and the like) and other auxiliary agents. Wherein the metal filler filled conductive rubber has excellent electrical property (volume resistivity up to 10)-2～10-3Omega cm) and are widely used in high-end fields such as electronic communications and aerospace. However, in the conductive rubber of the type, the metal filler is easy to generate oxidation reaction in air or high-temperature environment, so that the electrical property of the conductive rubber is reduced along with the prolonging of the service time. Meanwhile, the conductive network formed by the mutual lapping of the conductive particles has discontinuous points, so that the conductivity of the conductive network is difficult to reach the metal level. And the isotropic conductive performance of the conductive material is difficult to meet the application of the occasions with unidirectional conductive requirements. In addition, due to the addition of a large amount of conductive filler (the content of the conductive filler is usually between 60 and 90 weight percent), the filled conductive rubber has the defects of low strength, high density, high hardness, high cost and the like.
Patent 2014101628041 discloses a method for preparing a rubber composite material with a directional conductive function by combining a metal wire directional implantation process with a liquid silicone rubber casting process, which improves the corrosion resistance of the material while achieving an anisotropic conductive function. However, the problem of high density of the conductive rubber with a solid structure also exists, so that the light weight requirement of modern information equipment cannot be met; on the other hand, the compression ratio of the rubber composite material with the solid structure is low, and when the rubber composite material is used for gap filling, the uneven compression ratio phenomenon can be generated at the screw fastening part and the screw spacing part, so that the cover plate is warped, and the adverse effect can be caused on the long-term use of the equipment.
Therefore, it is necessary to solve the above problems.
Disclosure of Invention
Aiming at the problems, the invention provides sponge type directional conductive rubber and a preparation method thereof, metal wires are arranged in a directional mode and are subjected to modification treatment, and then the metal wires and liquid foaming silicone rubber are compounded, vulcanized and molded to prepare the conductive silicone rubber. The technical scheme adopted by the invention is as follows:
a sponge type directional conductive rubber comprises a rubber substrate made of liquid foaming silicone rubber, wherein the liquid foaming silicone rubber comprises a foaming agent, a cross-linking agent, a catalyst, white carbon black, a reinforcing agent, color paste, a flame retardant, a mildew preventive and a structure control agent, the rubber substrate is vulcanized to form a sponge structure, metal wires are uniformly arranged in the rubber substrate to serve as conductive carriers, and the surface of each continuous metal wire is sprayed by a coupling agent.
A preparation method of sponge type directional conductive rubber comprises the following steps:
s1, arranging filaments: fixing the wavy metal wires on the frame at equal intervals, wherein the distance between the metal wires is 0.8-1.2 mm, and the thickness of the fixed frame is 0.8-1.2 mm;
s2, preprocessing: uniformly spraying the prepared coupling agent solution on the surface of the metal wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, putting the metal wire into an oven, setting the temperature to be 120-130 ℃, and drying for 2-4 h, wherein the coupling agent adopts a silane coupling agent kh560, and the concentration of the prepared solution is 5%;
s3, fixing the frame: tightly stacking the pretreated metal wire frames in a mold along the same direction, and sealing the gap part by adopting a sealant after sealing;
s4, casting molding: injecting silicon rubber into the mold by using a rubber injection machine, and vulcanizing at room temperature for 24-48 h after the casting is finished;
s5, cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with certain shapes and sizes according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
Preferably, the metal wire is made of Monel wires, the diameter of the Monel wires is 0.12mm, the distance between the Monel wires is 1mm, the thickness of the fixed frame is 1mm, the prepared coupling agent solution is uniformly sprayed on the surface of the Monel wires by a spraying process, the Monel wires are placed in an oven at the temperature of 125 ℃ after spraying is finished, drying is carried out for 2 hours, the pretreated Monel wire frames are tightly stacked in the mold along the same direction, the stacking length is 0.8m, the sealing treatment is carried out on the gap part by a sealant, the silicone rubber is injected into the mold by a rubber injection machine, vulcanization is carried out at room temperature for 24 hours after casting is finished, the silicone rubber is made of ZJ-6548 foamed silicone rubber, and the rubber gasket with the thickness of 800mm × 11.5mm × 2.25mm is cut as required after the cast blank is taken out.
Preferably, the metal wire is a tin-phosphorus-plated bronze wire, the diameter of the tin-phosphorus-plated bronze wire is 0.1mm, the distance between the tin-phosphorus-plated bronze wires is 1mm, the thickness of the fixing frame is 1mm, the prepared coupling agent solution is uniformly sprayed on the surface of the tin-phosphorus-plated bronze wire by adopting a spraying process, the tin-phosphorus-plated bronze wire is placed into an oven to be set at the temperature of 130 ℃ after the spraying is finished, the tin-phosphorus-plated bronze wire is dried for 3 hours, the pretreated tin-phosphorus-plated bronze wire frame is tightly stacked in a mold along the same direction, the stacking length is 1m, the gap part is sealed by adopting a sealant after the sealing treatment, the silicon rubber is injected into the mold by adopting a rubber injection machine, the silicon rubber is vulcanized for 48 hours at room temperature after the pouring is finished, the silicon rubber is foamed by adopting ZJ-6548, and after the pouring blank is taken out, the rubber gasket is cut into a rubber gasket with the size of 1000mm × 11.5mm × 2.25mm according to requirements.
Preferably, the metal wire is made of aluminum alloy wires, the diameter of each aluminum alloy wire is 0.15mm, the distance between the aluminum alloy wires is 1mm, the thickness of the fixed frame is 1mm, the prepared coupling agent solution is uniformly sprayed on the surface of the aluminum alloy wires by adopting a spraying process, the aluminum alloy wires are placed into an oven to be set at the temperature of 120 ℃ after spraying, drying is carried out for 4 hours, the aluminum alloy wire frames after pretreatment are tightly stacked in the mold along the same direction, the stacking length is 1m, the gap part is sealed by adopting a sealant after sealing treatment, silicon rubber is injected into the mold by adopting a rubber injection machine, and vulcanization is carried out for 48 hours at room temperature after pouring is finished, wherein the silicon rubber is made of ZJ-6548 foamed silicon rubber, and after a pouring blank is taken out, the rubber gasket is cut into rubber gaskets of 1000mm x 11.5mm x 2.25mm according to requirements.
Preferably, the metal wires are made of Monel wires, the diameter of each Monel wire is 0.15mm, the distance between every two Monel wires is 1mm, the thickness of the fixed frame is 1mm, the prepared coupling agent solution is uniformly sprayed on the surface of each Monel wire by a spraying process, the metal wires are placed in an oven to be set at the temperature of 120 ℃ after the spraying is finished, the metal wires are dried for 44 hours, the pretreated Monel wire frames are tightly stacked in the mold along the same direction, the stacking length is 1m, the sealing treatment is carried out on the gap part by the sealant after the sealing treatment, the silicon rubber is injected into the mold by a rubber injection machine, and the vulcanization is carried out at the room temperature for 24 hours after the casting is finished, wherein the silicon rubber is made of HY-F663 double-component liquid foaming silicon rubber, and the cast blank is taken out and then cut into a rubber gasket with the size of 1000mm × 11.5mm × 2.25mm according to requirements.
Preferably, the metal wire adopts aluminum alloy wire, the diameter of aluminum alloy wire is 0.1mm, the distance between the aluminum alloy wire is 0.8mm, the thickness of the fixed frame is 1mm, the prepared coupling agent solution is uniformly sprayed on the surface of the aluminum alloy wire by adopting a spraying process, the aluminum alloy wire is placed into an oven to set the temperature at 125 ℃ after the spraying is finished, the aluminum alloy wire is dried for 4h, the aluminum alloy wire frame after the pretreatment is tightly stacked in the mold along the same direction, the stacking length is 1m, the gap part is sealed by adopting a sealant after the sealing treatment, the silicon rubber is injected into the mold by adopting a glue injection machine, the vulcanization is carried out for 48h at room temperature after the pouring is finished, wherein the silicon rubber adopts HY-F663 double-component liquid foamed silicon rubber, and after the pouring blank is taken out, the rubber gasket with the size of 1000mm multiplied by 11.5mm by multiplied by 2.25mm is cut according to requirements.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention utilizes liquid foaming silicon rubber as a base material, realizes the directional conductive function of the composite material through the directional implantation of the metal wire, and simultaneously carries out the wave structure design and the coupling agent spraying treatment on the metal wire, thereby realizing the interface enhancement between the metal wire and the silicon rubber and further improving the mechanical strength of the composite material.
2. The invention adopts the continuous metal wire as the conductive filler, avoids the phenomenon that the resistance is increased due to the contact resistance caused by the mutual contact between the traditional conductive particles, also avoids the problem of electrical property reduction caused by the oxidation of the metal conductive particles, and is beneficial to the stability of the electrical property of the composite material.
3. The mass ratio of the implanted metal wire is less than 20%, and the foam molding process is adopted to form a sponge structure, so that the density of the composite material can be greatly reduced, the composite material has the advantage of light weight, and the compression rate of the gasket can be improved to 50%.
Compared with the traditional metal-filled conductive rubber, the sponge-type directional conductive rubber prepared by the invention has the advantages of low density, good flexibility, good corrosion resistance, stable electrical property and the like, can be applied to the fields of consumer electronics, military communication, aerospace and the like, and realizes the electromagnetic protection function of products.
Drawings
FIG. 1 is a schematic structural diagram of a product of the present invention;
FIG. 2 is a view of the wire mounting frame;
FIG. 3 is a diagram of a model of a conventional conductive rubber conduction mechanism;
FIG. 4 is a schematic diagram of a model of the conduction mechanism of the present invention;
in the figure: 1 is a rubber substrate, 2 is a metal wire, Rc is a contact resistance, and Re is a conductive carrier self-resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the invention provides a sponge type directional conductive rubber and a preparation method thereof, wherein a conductive rubber blank is prepared by pouring liquid foaming silicone rubber into metal wires which are arranged in a directional and ordered manner and vulcanizing and molding, so that the uniform directional distribution of the metal wires in a rubber matrix and the sponge-like structure of the silicone rubber can be realized simultaneously, and a gasket product with a certain shape and size can be prepared after cutting along the direction vertical to the arrangement direction of the metal wires.
The silicon rubber is liquid foaming silicon rubber, contains foaming agent, cross-linking agent, catalyst, white carbon black, reinforcing agent, color paste, flame retardant, mildew preventive and structure control agent, can be vulcanized at room temperature, the metal wire adopts Monel wire with the diameter of 0.1-0.2 mm, tin-plated phosphorus bronze wire, aluminum alloy wire and the like, is in a wave shape, and is sprayed by the coupling agent, so that the interface strength between the metal wire and the silicon rubber substrate can be improved, and the mechanical property of the product can be improved.
After cutting, the continuous metal wires penetrate through the upper surface and the lower surface of the rubber to form a conductive path, so that the reduction of electrical property caused by contact resistance due to the accumulation of a large amount of conductive powder is avoided, the using amount of a conductive carrier can be greatly reduced compared with metal filled conductive rubber, the density of a product is reduced, and the stability of the long-term electrical property of the product is improved. The sponge-like structure formed by the foaming process can further realize the light weight of the product.
The sponge type directional conductive rubber prepared by the invention has the advantages of low density, good flexibility, good corrosion resistance, stable electrical property and the like, can be applied to the fields of consumer electronics, military communication, aerospace and the like, and realizes the electromagnetic protection function of products.
The following are 5 specific examples of the present invention:
example 1:
(1) filament arrangement: the wavy Monel wires are fixed on the frame at equal intervals, the diameter of the Monel wires is 0.12mm, the distance between the metal wires is 1mm, and the thickness of the fixed frame is 1 mm.
(2) Pretreatment: and uniformly spraying the prepared coupling agent solution on the surface of the Monel wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, the Monel wire is placed into a drying oven, the temperature is set to be 125 ℃, and the drying is carried out for 2h, wherein the coupling agent adopts a silane coupling agent kh560, and the concentration of the prepared solution is 5%.
(3) Fixing the frame: and tightly stacking the pretreated Monel wire frame in a mold along the same direction, wherein the stacking length is 0.8m, and sealing the gap by adopting a sealant after sealing.
(4) And (3) casting molding: and (3) injecting the silicon rubber into a mold by using an injection machine, and vulcanizing at room temperature for 24 hours after the completion of casting, wherein the silicon rubber is Hangzhou Jiang organic silicon ZJ-6548 foamed silicon rubber.
(5) Cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with the sizes of 800mm multiplied by 11.5mm multiplied by 2.25mm according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
Example 2:
(1) filament arrangement: the wavy tin-plated phosphorus bronze wires are fixed on the frame at equal intervals, the diameter of each tin-plated phosphorus bronze wire is 0.1mm, the distance between every two metal wires is 1mm, and the thickness of the fixed frame is 1 mm.
(2) Pretreatment: and uniformly spraying the prepared coupling agent solution on the surface of the tin-phosphorus-plated bronze wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, the tin-phosphorus-plated bronze wire is placed into a drying oven, the temperature is set to be 130 ℃, and the drying is carried out for 3h, wherein the coupling agent adopts a silane coupling agent kh560, and the concentration of the prepared solution is 5%.
(3) Fixing the frame: and closely stacking the pretreated tin-phosphorus-plated bronze wire frame in a mold along the same direction, wherein the stacking length is 1m, and sealing the gap by adopting a sealant after sealing.
(4) And (3) casting molding: and (3) injecting the silicon rubber into a mold by using an injection machine, and vulcanizing at room temperature for 48 hours after the completion of casting, wherein the silicon rubber is Hangzhou Jiang organic silicon ZJ-6548 foamed silicon rubber.
(5) Cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with the diameters of 1000mm multiplied by 11.5mm multiplied by 2.25mm according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
Example 3:
(1) filament arrangement: fixing the wavy aluminum alloy wires on the frame at equal intervals, wherein the diameter of the aluminum alloy wires is 0.15mm, the distance between the aluminum alloy wires is 1mm, and the thickness of the fixed frame is 1 mm.
(2) Pretreatment: and uniformly spraying the prepared coupling agent solution on the surface of the aluminum alloy wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, putting the aluminum alloy wire into an oven, setting the temperature to be 120 ℃, and drying for 4h, wherein the coupling agent is a silane coupling agent kh560, and the concentration of the prepared solution is 5%.
(3) Fixing the frame: and tightly stacking the pretreated aluminum alloy wire frame in a mold along the same direction, wherein the stacking length is 1m, and sealing the gap part by adopting a sealant after sealing.
(4) And (3) casting molding: and (3) injecting the silicon rubber into a mold by using an injection machine, and vulcanizing at room temperature for 48 hours after the completion of casting, wherein the silicon rubber is Hangzhou Jiang organic silicon ZJ-6548 foamed silicon rubber.
(5) Cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with the diameters of 1000mm multiplied by 11.5mm multiplied by 2.25mm according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
Example 4:
(1) filament arrangement: the wavy Monel wires are fixed on the frame at equal intervals, the diameter of the Monel wires is 0.15mm, the distance between the Monel wires is 1mm, and the thickness of the fixed frame is 1 mm.
(2) Pretreatment: and uniformly spraying the prepared coupling agent solution on the surface of the Monel wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, putting the metal wire into an oven, setting the temperature to be 120 ℃, and drying for 44h, wherein the coupling agent adopts a silane coupling agent kh560, and the concentration of the prepared solution is 5%.
(3) Fixing the frame: and tightly stacking the pretreated Monel wire frame in a mold along the same direction, wherein the stacking length is 1m, and sealing the gap by adopting a sealant after sealing.
(4) And (3) casting molding: and (3) injecting silicon rubber into the mold by using a rubber injection machine, and vulcanizing at room temperature for 24h after the completion of the pouring, wherein the silicon rubber is liquid foaming silicon rubber prepared by HY-F663 of Shenzhen Hongyeljie science and technology Limited.
(5) Cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with the diameters of 1000mm multiplied by 11.5mm multiplied by 2.25mm according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
Example 5:
(1) filament arrangement: fixing the wavy aluminum alloy wires on the frame at equal intervals, wherein the diameter of the aluminum alloy wires is 0.1mm, the distance between the aluminum alloy wires is 0.8mm, and the thickness of the fixed frame is 1 mm.
(2) Pretreatment: and uniformly spraying the prepared coupling agent solution on the surface of the aluminum alloy wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, putting the aluminum alloy wire into a drying oven, setting the temperature to be 125 ℃, and drying for 4h, wherein the coupling agent adopts a silane coupling agent kh560, and the concentration of the prepared solution is 5%.
(3) Fixing the frame: and tightly stacking the pretreated aluminum alloy wire frame in a mold along the same direction, wherein the stacking length is 1m, and sealing the gap part by adopting a sealant after sealing.
(4) And (3) casting molding: and (3) injecting silicon rubber into the mold by using a rubber injection machine, and vulcanizing at room temperature for 48h after the completion of the pouring, wherein the silicon rubber is liquid foaming silicon rubber prepared by HY-F663 of Shenzhen Hongyeljie science and technology Limited.
(5) Cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with the diameters of 1000mm multiplied by 11.5mm multiplied by 2.25mm according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (6)
1. A sponge type directional conductive rubber is characterized in that: the rubber base body is vulcanized to form a spongy structure, metal wires are uniformly arranged in the rubber base body to serve as conductive carriers, and the surfaces of the metal wires are subjected to spraying treatment by using a coupling agent;
the preparation method comprises the following steps:
s1, arranging filaments: fixing the wavy metal wires on the frame at equal intervals, wherein the distance between the metal wires is 0.8-1.2 mm, and the thickness of the fixed frame is 0.8-1.2 mm;
s2, preprocessing: uniformly spraying the prepared coupling agent solution on the surface of the metal wire by adopting a spraying process, wherein the pressure of a spray gun is 0.2MPa, the spraying time is 30s, after the spraying is finished, putting the metal wire into an oven, setting the temperature to be 120-130 ℃, and drying for 2-4 h, wherein the coupling agent adopts a silane coupling agent kh560, and the concentration of the prepared solution is 5%;
s3, fixing the frame: tightly stacking the pretreated metal wire frames in a mold along the same direction, and sealing the gap part by adopting a sealant after sealing; s4, casting molding: injecting silicon rubber into the mold by using a rubber injection machine, and vulcanizing at room temperature for 24-48 h after the casting is finished; s5, cutting: taking out the casting blank body, and cutting the casting blank body into rubber gaskets with certain shapes and sizes according to requirements, wherein the cutting direction is vertical to the arrangement direction of the metal wires.
2. The sponge-type oriented conductive rubber according to claim 1, wherein: the method comprises the steps of uniformly spraying a prepared coupling agent solution on the surface of Monel wires by adopting Monel wires with the diameter of 0.12mm and the thickness of a fixed frame of 1mm, putting the Monel wires into an oven with the temperature of 125 ℃ after spraying, drying for 2h, tightly stacking the pretreated Monel wire frames in a mold along the same direction with the stacking length of 0.8m, sealing the gap by adopting a sealant after sealing, injecting silicon rubber into the mold by adopting a rubber injection machine, vulcanizing for 24h at room temperature after pouring, wherein the silicon rubber is foamed by adopting ZJ-6548 silicon rubber, and cutting into a rubber gasket with the diameter of 800mm multiplied by 11.5mm multiplied by 2.25mm as required after taking out a pouring blank.
3. The sponge-type oriented conductive rubber according to claim 1, wherein: the metal wire is a tin-phosphorus-plated bronze wire, the diameter of the tin-phosphorus-plated bronze wire is 0.1mm, the distance between the tin-phosphorus-plated bronze wires is 1mm, the thickness of a fixed frame is 1mm, a prepared coupling agent solution is uniformly sprayed on the surface of the tin-phosphorus-plated bronze wire by adopting a spraying process, the tin-phosphorus-plated bronze wire is placed into an oven to be dried for 3 hours at the temperature of 130 ℃, the pretreated tin-phosphorus-plated bronze wire frame is tightly stacked in a mold along the same direction, the stacking length is 1m, the gap part is sealed by adopting a sealant after sealing treatment, silicon rubber is injected into the mold by adopting a rubber injection machine, and the silicon rubber is vulcanized for 48 hours at room temperature after casting, wherein the silicon rubber is formed by foaming silicon rubber ZJ-6548 and is cut into a rubber gasket with the size of 1000mm multiplied by 11.5mm by 2.25mm according to requirements after a cast blank body is taken out.
4. The sponge-type oriented conductive rubber according to claim 1, wherein: the metal wire adopts aluminum alloy wire, the aluminum alloy wire diameter is 0.15mm, distance between the aluminum alloy wire is 1mm, the thickness of fixed frame is 1mm, adopt the spraying technology with the even spraying of prepared coupling agent solution on the aluminum alloy wire surface, put into the oven after the spraying completion with aluminum alloy wire and set up the temperature 120 ℃, dry 4h, closely pile up the aluminum alloy wire frame after the preliminary treatment in the mould along same direction, pile up length and be 1m, adopt sealant to seal the seam position after the sealing treatment, adopt the injecting glue machine to pour silicon rubber into the mould, after the pouring is accomplished, vulcanize 48h at room temperature, wherein silicon rubber adopts ZJ-6548 foaming silicon rubber, after taking out and pouring the idiosome, cut into the rubber liner of 1000mm x 11.5mm x 2.25mm as required.
5. The sponge-type oriented conductive rubber according to claim 1, wherein: the method comprises the steps of uniformly spraying a prepared coupling agent solution on the surface of Monel wires by a spraying process, putting the metal wires into an oven at a temperature of 120 ℃ after spraying is finished, drying for 44h, tightly stacking the pretreated Monel wire frames in a mold along the same direction, wherein the stacking length is 1m, sealing the gap by using a sealant after sealing, injecting silicon rubber into the mold by using a rubber injection machine, vulcanizing for 24h at room temperature after casting is finished, wherein the silicon rubber is HY-F663 bi-component liquid foamed silicon rubber, taking out a cast blank body, and cutting the cast blank body into a rubber gasket with the diameter of 1000mm multiplied by 11.5mm multiplied by 2.25 mm.
6. The sponge-type oriented conductive rubber according to claim 1, wherein: the metal wire adopts aluminum alloy wire, aluminum alloy wire diameter is 0.1mm, distance between the aluminum alloy wire is 0.8mm, fixed frame's thickness is 1mm, adopt the spraying technology with the even spraying of the coupling agent solution that disposes on aluminum alloy wire surface, put into the oven with aluminum alloy wire after the spraying is accomplished and set up the temperature 125 ℃, dry 4h, closely pile up the aluminum alloy wire frame after the preliminary treatment in the mould along same direction, pile up length and be 1m, adopt the sealant to carry out sealing treatment to the seam position after the sealing treatment, adopt the injecting glue machine to pour into the silicon rubber into the mould, after the pouring is accomplished, vulcanize 48h at room temperature, wherein the silicon rubber adopts HY-F663 bi-component liquid foaming silicon rubber, after taking out the pouring idiosome, cut into the rubber liner of 1000mm x 11.5mm x 2.25mm as required.
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