CN103313585A - Conductive foam and preparation method thereof - Google Patents
Conductive foam and preparation method thereof Download PDFInfo
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- CN103313585A CN103313585A CN2013101990216A CN201310199021A CN103313585A CN 103313585 A CN103313585 A CN 103313585A CN 2013101990216 A CN2013101990216 A CN 2013101990216A CN 201310199021 A CN201310199021 A CN 201310199021A CN 103313585 A CN103313585 A CN 103313585A
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- nickel foil
- foil cloth
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Abstract
The invention discloses conductive foam comprising a silica gel body and nickel foil cloth which is wrapped on the silica gel body; an adhesive layer is arranged between the silica gel body and the nickel foil cloth; the adhesive layer adheres the nickel foil cloth and the silica gel body into an integral structure; and the nickel foil cloth comprises a polyimide film, and a copper plated layer and a nickel plated layer which are sequentially plated on the outer surface of the polyimide film. A preparation method of the conductive foam comprises the following steps that silica gel is extruded, formed and semi-vulcanized; after the semi-vulcanized silica gel is uniformly applied with silica gel treatment agent and naturally air-dried, silica gel binder is applied on the nickel foil cloth, and then the nickel foil cloth is coated; and after coating, a product is baked and reinforced, and the conductive foam is obtained. The conductive foam has the characteristics of high temperature resistance, tin plating and automatic welding, and can be automatically mounted; and meanwhile, the integration of all layers of materials of the conductive foam is tighter, and all layers of materials are not separated when the conductive foam is used.
Description
Technical field
The present invention relates to a kind of conducting foam and preparation method thereof, particularly relate to a kind of conducting foam applicable to automatically mounting solder technology and preparation method thereof.
Background technology
Shielding is exactly to carrying out the isolation of metal between two area of space, a zone being arranged to induction and the radiation in another zone with control electric field, magnetic field and electromagnetic wave.Specifically, be surrounded with the interference source of shield with component, circuit, sub-assembly, cable or whole system exactly, prevent that interfere with electromagnetic field is to outdiffusion; To accept circuit, equipment or system with shield and be surrounded, prevent that they are subject to the impact of external electromagnetic field.
Shielding material commonly used has the base material such as polyster fibre wrap up the liner (being commonly called as conducting foam) of foam and filler formation behind the coat of metal, comprise the conductive rubber shielding gasket, beryllium copper reed shielding gasket, conducting resinl, magnetic field shielding material (be commonly called as and inhale the ripple material), shield glass and shielding tape, the conducting foam liner is large with compressibility, applicable multiple standards configuration, can be die-cut into institute's difformity, the advantage of the aspects such as low price is widely used, but because existing conducting foam adopts common hot melting way, and the characteristic of material itself, do not possess high temperature resistant, can go up the characteristics of tin, and can't automatically assemble, it in use needs hand paste, bad and the gum of adhesion appears in the handwork meeting place the long period after viscosity not good, affect the product sticking effect, existing product needs gum simultaneously, need remove single stickup behind the strippable paper, increase to a great extent personnel cost, restricted its development.
Summary of the invention
For the deficiencies in the prior art, first purpose of the present invention is for a kind of conducting foam is provided, but that it has is high temperature resistant, the characteristics that can go up the tin automatic welding, can realize automatically mounting; The simultaneously combination between the layers of material of this conducting foam is tightr, can avoid in use occurring throwing off phenomenon.
Second purpose of the present invention is for a kind of manufacture method of conducting foam is provided.
First purpose of the present invention adopts following technical scheme:
A kind of conducting foam is characterized in that: comprise the nickel foil cloth of silica gel body and the described silica gel body of parcel, also be provided with tack coat between silica gel body and nickel foil cloth, described tack coat is bonding into a single integrated structure with nickel foil cloth and silica gel body; Described nickel foil cloth is by polyimide film (PI film) and copper plate and the nickel coating of plating on the outer surface of polyimide film successively.
Realize that first purpose of the present invention can also reach by taking following technical scheme:
Realization one embodiment of the present invention are: described tack coat is silica gel glue tack coat.
Realization one embodiment of the present invention are: described silica gel glue comprises silica gel treatment and silica gel binding agent, and silica gel treatment is comprised of following component by weight: 5 parts of organosilicon cross-linking agents, 45 parts of alcohols solvents, 20 parts of celluloses, 30 parts of polysiloxanes; The silica gel binding agent is comprised of following component by weight: 5 parts of silane couplers, 20 parts of polysiloxanes, 1 part of platinum network thing, 70 parts of vinyl silicone oils, 3.5 parts of containing hydrogen silicone oils, 0.5 part in inhibitor.
Realization one embodiment of the present invention are: in described silica gel treatment, organosilicon cross-linking agent is tetraethoxysilane, alcohols solvent is one or both combinations in ethylene glycol and the propylene glycol, and cellulose is methylcellulose, and polysiloxanes is dimethyl silicone polymer.
Realization one embodiment of the present invention are: in described silica gel binding agent, silane coupler is a kind of among KH-550, KH-560, the KH-570 or two kinds; Polysiloxanes is dimethyl silicone polymer; Platinum complex is platinum acid chloride solution, and wherein the content of chloroplatinic acid is 2000ppm; The viscosity of vinyl silicone oil is 500-2000mps; The hydrogen content of containing hydrogen silicone oil is 0.18%; Inhibitor is alcohol of acetylene basic ring.
Second purpose of the present invention adopts following technical scheme:
A kind of manufacture method of conducting foam is characterized in that carrying out according to the following steps:
1) sneak into mill base and vulcanizing agent in silica gel, each component addition is by weight percentage: silica gel 99.109%, mill base 0.297%, vulcanizing agent 0.594%;
2) with after the silica gel extrusion molding, carry out semi-cure and process, so that silica gel is in the semi-cure state;
3) silica gel under the semi-cure state is evenly coated silica gel treatment, after natural air drying 15-30 minute, coat the silica gel binding agent at nickel foil cloth;
4) silica gel of using the nickel foil cloth that scribbles the silica gel binding agent will scribble silica gel treatment wraps up, and the parcel temperature is at 130 ℃-160 ℃;
5) after parcel finishes, the product that has wrapped is put into baking box reinforce through baking, stoving time is 1H, and baking temperature is: 150 ℃; Namely obtain conducting foam.
During use, the product after the baking after placing 1H under the normal temperature state, is cut; To cut rear product, and adopt carrier band manner of packing packing, every dish packaging quantity is 500 or 1000pcs (or according to customer requirement).
Realize that second purpose of the present invention can also reach by taking following technical scheme:
Realization one embodiment of the present invention are: in step 1), described vulcanizing agent is peroxidating two (2,4-dichloro-benzoyl).
Realization one embodiment of the present invention are: in step 2) in, the semi-cure processing procedure is: vulcanize through four humidity provinces successively, be respectively: 230 ℃, 250 ℃, 250 ℃, 260 ℃, the cure time of each humidity province is 5-10 minute.
Realization one embodiment of the present invention are: in step 3), described silica gel treatment and silica gel binding agent consist of silica gel glue tack coat; Wherein, silica gel treatment is comprised of by weight following component: 5 parts of organosilicon cross-linking agents, 45 parts of alcohols solvents, 20 parts of celluloses, 30 parts of polysiloxanes; The silica gel binding agent is comprised of following component by weight: 5 parts of silane couplers, 20 parts of polysiloxanes, 1 part of platinum network thing, 70 parts of vinyl silicone oils, 3.5 parts of containing hydrogen silicone oils, 0.5 part in inhibitor.
Realization one embodiment of the present invention are: in step 3), described nickel foil cloth is by polyimide film (PI film) and copper plate and the nickel coating of plating on the outer surface of polyimide film successively.
Beneficial effect of the present invention is:
1, the present invention is by adopting silica gel as inner stuffing, and through silica gel treatment and silica gel binding agent silica gel and nickel foil cloth are adhered together, viscosity is constant behind high temperature, having can be high temperature resistant (280 ℃, 2 minutes kinds) advantage, combination between layers of material is tightr, can avoid in use occurring throwing off phenomenon.The present invention is by establishing copper plate and nickel coating at the outer surface of polyimide film, but has advantages of and can go up the tin automatic welding, can realize automatically mounting.The present invention can also pass through flame retardant test.
2, surface of the present invention is the material of copper facing/nickel, has advantages of that resistance value is little, and resistance value is below 0.03 Ω.And conducting foam of the present invention cosmetic variation after salt mist test is little, and resistance is below 0.1 Ω, and having advantages of can anticorrosive effect.And the outward appearance corrosion is more serious behind the existing mill run salt fog, and the part maximum resistance reaches＞20k Ω.
3, the present invention plays ground connection or shields dry sound and interference effect by conducting in electronic product, adopts automatic mounting technology in installation, but by packing the location desired location of carrier band, plays the purpose of fixed product and conducting by upper tin.
Description of drawings
Fig. 1 is the structural representation of conducting foam of the present invention.
Fig. 2 is the cut-away view of nickel foil cloth of the present invention.
Embodiment
Specific embodiment:
Below, by reference to the accompanying drawings and embodiment, the present invention is described further:
With reference to Fig. 1, the described conducting foam of the present embodiment comprises silica gel body 1 and the nickel foil cloth 3 that wraps up described silica gel body, also is provided with tack coat 2 between silica gel body 1 and nickel foil cloth 3, and described tack coat 2 is bonding into a single integrated structure with nickel foil cloth 3 and silica gel body 1.
With reference to Fig. 2, described nickel foil cloth 3 by polyimide film (PI film) 31 and successively copper plate 32 and the nickel coating 33 of plating on the outer surface of polyimide film 31 consist of.
Described tack coat 2 is silica gel glue tack coat.
Described silica gel glue comprises silica gel treatment and silica gel binding agent, and silica gel treatment is comprised of following component by weight: 5 parts of organosilicon cross-linking agents, 45 parts of alcohols solvents, 20 parts of celluloses, 30 parts of polysiloxanes; The silica gel binding agent is comprised of following component by weight: 5 parts of silane couplers, 20 parts of polysiloxanes, 1 part of platinum network thing, 70 parts of vinyl silicone oils, 3.5 parts of containing hydrogen silicone oils, 0.5 part in inhibitor.
In described silica gel treatment, organosilicon cross-linking agent is tetraethoxysilane, and alcohols solvent is one or both combinations in ethylene glycol and the propylene glycol, and cellulose is methylcellulose, and polysiloxanes is dimethyl silicone polymer.
In described silica gel binding agent, silane coupler is a kind of among KH-550, KH-560, the KH-570 or two kinds; Polysiloxanes is dimethyl silicone polymer; Platinum complex is platinum acid chloride solution, and wherein, the content of chloroplatinic acid is 2000ppm; The viscosity of vinyl silicone oil is 500-2000mps; The hydrogen content of containing hydrogen silicone oil is 0.18%; Inhibitor is alcohol of acetylene basic ring.
The shape of described conducting foam can adjust according to mould, such as difformities such as rectangle, circle, middle with holes, wherein the effect of nickel foil cloth be conduction, the utilization that can go up tin, the surface mounting technology such as high temperature resistant, the effect of silica gel glue tack coat is effective bonding nickel foil cloth and silica gel, and can reach face high temperature and do not produce the anomalies such as cracking, the effect of silica gel is filling product, thereby reaches the purpose of using certain compression factor can play good filling and integral product conducting.
A kind of manufacture method of conducting foam, carry out according to the following steps:
1) sneak into mill base and vulcanizing agent in silica gel, each component addition is by weight percentage: silica gel 99.109%, mill base 0.297%, vulcanizing agent 0.594%; Described vulcanizing agent is peroxidating two (2,4-dichloro-benzoyl).
2) with after the silica gel extrusion molding, carry out semi-cure and process, so that silica gel is in the semi-cure state; The semi-cure processing procedure is: vulcanize through four humidity provinces successively, be respectively: 230 ℃, 250 ℃, 250 ℃, 260 ℃, the cure time of each humidity province is 5-10 minute.
3) silica gel under the semi-cure state is evenly coated silica gel treatment, after natural air drying 15-30 minute, coat the silica gel binding agent at nickel foil cloth;
4) silica gel of using the nickel foil cloth that scribbles the silica gel binding agent will scribble silica gel treatment wraps up, and the parcel temperature is at 130 ℃-160 ℃;
5) after parcel finishes, the product that has wrapped is put into baking box reinforce through baking, stoving time is 1H, and baking temperature is: 150 ℃; Namely obtain conducting foam.
During use, the product after the baking after placing 1H under the normal temperature state, is cut; To cut rear product, and adopt carrier band manner of packing packing, every dish packaging quantity is 500 or 1000pcs (or according to customer requirement).
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion should belong within the protection range of claim of the present invention all.
Claims (10)
1. conducting foam is characterized in that: comprise the nickel foil cloth of silica gel body and the described silica gel body of parcel, also be provided with tack coat between silica gel body and nickel foil cloth, described tack coat is bonding into a single integrated structure with nickel foil cloth and silica gel body; Described nickel foil cloth is by polyimide film and copper plate and the nickel coating of plating on the outer surface of polyimide film successively.
2. conducting foam according to claim 1, it is characterized in that: described tack coat is silica gel glue tack coat.
3. conducting foam according to claim 2, it is characterized in that: described silica gel glue comprises silica gel treatment and silica gel binding agent, and silica gel treatment is comprised of following component by weight: 5 parts of organosilicon cross-linking agents, 45 parts of alcohols solvents, 20 parts of celluloses, 30 parts of polysiloxanes; The silica gel binding agent is comprised of following component by weight: 5 parts of silane couplers, 20 parts of polysiloxanes, 1 part of platinum network thing, 70 parts of vinyl silicone oils, 3.5 parts of containing hydrogen silicone oils, 0.5 part in inhibitor.
4. conducting foam according to claim 3, it is characterized in that: in described silica gel treatment, organosilicon cross-linking agent is tetraethoxysilane, and alcohols solvent is one or both combinations in ethylene glycol and the propylene glycol, cellulose is methylcellulose, and polysiloxanes is dimethyl silicone polymer.
5. conducting foam according to claim 3, it is characterized in that: in described silica gel binding agent, silane coupler is a kind of among KH-550, KH-560, the KH-570 or two kinds; Polysiloxanes is dimethyl silicone polymer; Platinum complex is platinum acid chloride solution, and wherein the content of chloroplatinic acid is 2000ppm; The viscosity of vinyl silicone oil is 500-2000mps; The hydrogen content of containing hydrogen silicone oil is 0.18%; Inhibitor is alcohol of acetylene basic ring.
6. the manufacture method of a conducting foam is characterized in that carrying out according to the following steps:
1) sneak into mill base and vulcanizing agent in silica gel, each component addition is by weight percentage: silica gel 99.109%, mill base 0.297%, vulcanizing agent 0.594%;
2) with after the silica gel extrusion molding, carry out semi-cure and process, so that silica gel is in the semi-cure state;
3) silica gel under the semi-cure state is evenly coated silica gel treatment, after natural air drying 15-30 minute, coat the silica gel binding agent at nickel foil cloth;
4) silica gel of using the nickel foil cloth that scribbles the silica gel binding agent will scribble silica gel treatment wraps up, and the parcel temperature is at 130 ℃-160 ℃;
5) after parcel finishes, the product that has wrapped is put into baking box reinforce through baking, stoving time is 1H, and baking temperature is: 150 ℃; Namely obtain conducting foam.
7. the manufacture method of conducting foam according to claim 6 is characterized in that: in step 1), described vulcanizing agent is peroxidating two (2,4-dichloro-benzoyl).
8. the manufacture method of conducting foam according to claim 6, it is characterized in that: in step 2) in, the semi-cure processing procedure is: vulcanize through four humidity provinces successively, be respectively: 230 ℃, 250 ℃, 250 ℃, 260 ℃, the cure time of each humidity province is 5-10 minute.
9. the manufacture method of conducting foam according to claim 6 is characterized in that: in step 3), described silica gel treatment and silica gel binding agent consist of silica gel glue tack coat; Wherein, silica gel treatment is comprised of by weight following component: 5 parts of organosilicon cross-linking agents, 45 parts of alcohols solvents, 20 parts of celluloses, 30 parts of polysiloxanes; The silica gel binding agent is comprised of following component by weight: 5 parts of silane couplers, 20 parts of polysiloxanes, 1 part of platinum network thing, 70 parts of vinyl silicone oils, 3.5 parts of containing hydrogen silicone oils, 0.5 part in inhibitor.
10. the manufacture method of conducting foam according to claim 6 is characterized in that: in step 3), described nickel foil cloth is by polyimide film and copper plate and the nickel coating of plating on the outer surface of polyimide film successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199021.6A CN103313585B (en) | 2013-05-24 | A kind of conducting foam and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199021.6A CN103313585B (en) | 2013-05-24 | A kind of conducting foam and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103313585A true CN103313585A (en) | 2013-09-18 |
| CN103313585B CN103313585B (en) | 2016-11-30 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103945680A (en) * | 2014-04-22 | 2014-07-23 | 宁海县雁苍山电力设备厂 | Power box capable of absorbing electromagnetic radiation and manufacturing method of power box |
| CN105555116A (en) * | 2016-02-22 | 2016-05-04 | 深圳市鸿富诚屏蔽材料有限公司 | Conductive foam and fabrication method thereof |
| CN109273145A (en) * | 2018-11-06 | 2019-01-25 | 深圳市美信电子有限公司 | A kind of cladded type conducting foam and preparation method thereof |
| CN110337233A (en) * | 2019-07-02 | 2019-10-15 | 深圳市卓汉材料技术有限公司 | A kind of packaging type conductive high temperature resistance elastomer |
| CN110606972A (en) * | 2019-09-28 | 2019-12-24 | 苏州万合电子有限公司 | Manufacturing process of conductive foam |
| CN111452376A (en) * | 2020-04-27 | 2020-07-28 | 深圳市信维通信股份有限公司 | Manufacturing process of conductive foam |
| CN111873562A (en) * | 2020-07-01 | 2020-11-03 | 苏州华捷电子有限公司 | High-temperature-resistant high-resilience electromagnetic shielding conductive foam and preparation process thereof |
| CN112390979A (en) * | 2020-10-20 | 2021-02-23 | 北京中石伟业科技无锡有限公司 | Preparation method of high-temperature conductive shielding silica gel foam |
| CN115157830A (en) * | 2022-07-12 | 2022-10-11 | 深圳市飞荣达科技股份有限公司 | Method for manufacturing cold-wrapped foam roll material |
| CN115678093A (en) * | 2022-09-08 | 2023-02-03 | 启明星精密科技(惠州)有限公司 | Manufacturing method of conductive foam |
| CN116355417A (en) * | 2023-04-13 | 2023-06-30 | 徐州益友电子科技有限公司 | Conductive foam and preparation method thereof |
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| CN2819712Y (en) * | 2005-08-01 | 2006-09-20 | 深圳市智政实业有限公司 | Conductive cushion |
| CN201174858Y (en) * | 2008-04-07 | 2008-12-31 | 建汉科技股份有限公司 | Tensioning arrangement for electromagnetic shielding device |
| CN101472455A (en) * | 2007-12-29 | 2009-07-01 | 3M创新有限公司 | Electromagnetic shielding liner and method for filling clearance of electromagnetic shielding system |
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| WO2001024596A1 (en) * | 1999-09-30 | 2001-04-05 | Instrument Specialties Co., Inc. | Emi/rfi shielding device and gasket and method of making the same |
| CN2571138Y (en) * | 2002-09-28 | 2003-09-03 | 天瑞企业股份有限公司 | Electromagnetic interference (EMI) shielding layer structure |
| CN2819712Y (en) * | 2005-08-01 | 2006-09-20 | 深圳市智政实业有限公司 | Conductive cushion |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103945680A (en) * | 2014-04-22 | 2014-07-23 | 宁海县雁苍山电力设备厂 | Power box capable of absorbing electromagnetic radiation and manufacturing method of power box |
| CN105555116A (en) * | 2016-02-22 | 2016-05-04 | 深圳市鸿富诚屏蔽材料有限公司 | Conductive foam and fabrication method thereof |
| CN105555116B (en) * | 2016-02-22 | 2018-08-17 | 深圳市鸿富诚屏蔽材料有限公司 | A kind of conducting foam and its manufacturing method |
| CN109273145B (en) * | 2018-11-06 | 2023-09-22 | 美信新材料股份有限公司 | Coated conductive foam and preparation method thereof |
| CN109273145A (en) * | 2018-11-06 | 2019-01-25 | 深圳市美信电子有限公司 | A kind of cladded type conducting foam and preparation method thereof |
| CN110337233A (en) * | 2019-07-02 | 2019-10-15 | 深圳市卓汉材料技术有限公司 | A kind of packaging type conductive high temperature resistance elastomer |
| CN110606972A (en) * | 2019-09-28 | 2019-12-24 | 苏州万合电子有限公司 | Manufacturing process of conductive foam |
| CN111452376A (en) * | 2020-04-27 | 2020-07-28 | 深圳市信维通信股份有限公司 | Manufacturing process of conductive foam |
| CN111873562A (en) * | 2020-07-01 | 2020-11-03 | 苏州华捷电子有限公司 | High-temperature-resistant high-resilience electromagnetic shielding conductive foam and preparation process thereof |
| CN112390979A (en) * | 2020-10-20 | 2021-02-23 | 北京中石伟业科技无锡有限公司 | Preparation method of high-temperature conductive shielding silica gel foam |
| CN115157830A (en) * | 2022-07-12 | 2022-10-11 | 深圳市飞荣达科技股份有限公司 | Method for manufacturing cold-wrapped foam roll material |
| CN115678093A (en) * | 2022-09-08 | 2023-02-03 | 启明星精密科技(惠州)有限公司 | Manufacturing method of conductive foam |
| CN116355417A (en) * | 2023-04-13 | 2023-06-30 | 徐州益友电子科技有限公司 | Conductive foam and preparation method thereof |
| CN116355417B (en) * | 2023-04-13 | 2023-11-10 | 徐州益友电子科技有限公司 | Conductive foam and preparation method thereof |
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Address after: 518103 floor 1, 2 and 3, building C, No. 7, Fuyong East Avenue, Fenghuang community, Fuyong street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Shenzhen hongfucheng New Material Co.,Ltd. Address before: 518103 building C, Fenghuang third industrial zone, Fuyong Town, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HFC SHIELDING PRODUCTS Co.,Ltd. |