CN103980711A - Directional metal wire-filled anti-EMI silica gel liner and preparation method thereof - Google Patents

Directional metal wire-filled anti-EMI silica gel liner and preparation method thereof Download PDF

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Publication number
CN103980711A
CN103980711A CN201410162804.1A CN201410162804A CN103980711A CN 103980711 A CN103980711 A CN 103980711A CN 201410162804 A CN201410162804 A CN 201410162804A CN 103980711 A CN103980711 A CN 103980711A
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wire
silk
emi
silica gel
filled
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CN103980711B (en
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龙云耀
贾冬
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Beijing Taipaist Technology Development Co ltd
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Taiyuan City Tai Paisite Electronics Co Ltd
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Abstract

The invention provides a directional metal wire-filled anti-EMI silica gel liner and a preparation method thereof. The directional metal wire-filled anti-EMI silica gel liner comprises colloidal silica, and the metal wire is directly and uniformly distributed in the colloidal silica. The provided anti-EMI silica gel liner has high elasticity as common rubber, and has conductive reliability of metal material.

Description

Anti-EMI silica gel liner that a kind of directed wire is filled and preparation method thereof
Technical field
The present invention relates to anti-EMI technical field, anti-EMI silica gel liner that particularly a kind of directed wire is filled and preparation method thereof.
Background technology
Electromagnetic interference (Electromagnetic Interference is called for short EMI) refers to hertzian wave and electronic component effect and the interference phenomenon that produces, has two kinds of conducted interference and radiation interference.Conducted interference refers to by conducting medium the signal coupling (interference) on an electric network is arrived to another electric network.Radiation interference refers to that interfering source arrives another electric network by space its signal coupling (interference).Along with the development of electronic industry, electromagnetic radiation is ubiquitous, not only affects environment, and HUMAN HEALTH is also produced to harm, and having had a strong impact on the normal operation of electronics, naval vessel, vehicle etc., various anti-EMI shielding materials are exactly to apply for solving electromagnetic interference the electromagnetic protection material of producing.
In shielding material, there is the anti-EMI conductive rubber of class cushioning material, it is the metal particle that adds conduction in silica matrix, as silver powder, silver-plated copper powder, silvered aluminum powder, silvered glass powder, through molded vulcanization or extrusion moulding and make, for the flange of buckleing shell gap place or cover plate of electronics buckle case.First provide be electrically connected continuous, thereby prevent electromagnetic-wave leakage, play electromagnetic sealing effect; Secondly rubber has good water vapor seal effect, can play environmental sealing effect to the circuit of device interior and components and parts, also can be used in addition the occasion of ground connection and static discharge.
This traditional conduction is as glue liner metal powder content between 60~95%, and volume specific resistance is 10 -2~10 -3between Ω cm, have a lot of shortcomings, as large in hardness, intensity is low, tension set is large, conductive particle is oxidizable and high in cost of production.
Cause these shortcomings former because:
A. in rubber, contain a large amount of metal powders, the physicals of rubber is caused to detrimentally affect;
B. conductive particle specific surface area is large, oxidizable, electroconductibility environment and reducing in time;
C. contain a large amount of argents, cost is higher.
Summary of the invention
For solving above-mentioned the deficiencies in the prior art, the invention provides anti-EMI silica gel liner of a kind of directed wire filling and preparation method thereof, not only there is the snappiness of General Purpose Rubber, also there is the conduction reliability of metallic substance.
Technical scheme of the present invention is achieved in that the anti-EMI silica gel liner that a kind of directed wire is filled, and comprises colloidal silica, and described colloidal silica interior orientation is evenly distributed with wire.
Wherein, preferably, described wire is Monel silk or aluminium wire.
Wherein, preferably, the string diameter of described Monel silk or aluminium wire is 0.1~0.2mm.
Wherein, preferably, described Monel silk or aluminium wire are for being pressed into sine-shaped, sinusoidal Monel silk or aluminium wire.
Wherein, preferably, the peak height of described sine-shaped, sinusoidal Monel silk or aluminium wire is 0.05~0.35mm.
A preparation method for the anti-EMI silica gel liner that directed wire is filled, it comprises the following steps:
1) wire pre-treatment: after wire is deoiled by silane coupling agent or titanate coupling agent treat surface;
2) even cloth silk: wire uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding;
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, preferably, in described step 2, evenly the silk density after cloth silk is 140 ± 15/cm 2.
Beneficial effect of the present invention:
1. the present invention adds wire in silica gel, be bonded in wire in rubber and be difficult for dropping out, and not containing precious metal, wire content, below 10%, because wire amount is less, has ensured that liner has good rubber performance by chemical method.
2. all orientations wiry of the present invention are all vertical with the end face of colloidal silica, and conduction is reliable.
3. sine-shaped, sinusoidal wire, as spring, can make liner have good rebound resilience, and low compression is never out of shape.
4. silica gel liner of the present invention is applicable to serious irregular occasion.
5. arrange in design wiry, ensure not to be connected between wire, therefore moisture content can be from a silk to another silk, make product there is good humidity resistance, the shortcomings such as the easy oxidation corrosion of conventional particles filled-type rubber are overcome, therefore, the moistureproofness having had, does not connect between wire and can protection against the tide close transmission or " siphon " generation.
Can with many metals and alloy compatibility.
7. silica gel liner of the present invention can use in compared with large-temperature range.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is metal wire structure schematic diagram of the present invention;
Fig. 2 is the sectional view of silica gel liner of the present invention.
In figure, 1. colloidal silica, 2. wire.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The anti-EMI silica gel liner that directed wire is filled, comprises colloidal silica, and described colloidal silica interior orientation is evenly distributed with wire.
A preparation method for the anti-EMI silica gel liner that directed wire is filled, it comprises the following steps:
1) wire pre-treatment: after wire is deoiled by silane coupling agent or titanate coupling agent treat surface;
2) even cloth silk: wire uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding;
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 1, be with silane coupling agent or titanate coupling agent clean metal silk surface, to remove the dirt of wire surface.
Wherein, in step 2, evenly the silk density after cloth silk is 140 ± 15/cm 2.
Wherein, Monel is corronel, is the widest, the splendid non-corrosive metal of over-all properties of a kind of consumption maximum, purposes.
Embodiment 1
As depicted in figs. 1 and 2, the anti-EMI silica gel liner that a kind of directed wire of the present embodiment is filled, comprises colloidal silica 1, and described colloidal silica interior orientation is evenly distributed with wire 2.Wire 2 is Monel silk, and string diameter is 0.15mm, is pressed into sinusoidal.
Wherein, the peak height of sine-shaped, sinusoidal Monel silk is 0.2mm.
The preparation method of the anti-EMI silica gel liner that above-mentioned directed wire is filled, comprises the following steps:
1) Monel silk pre-treatment: Monel silk is pressed into sinusoidal, uses silane coupling agent treat surface after deoiling, ensure to there is enough bonding forces between wire and rubber;
2) even cloth silk: Monel silk uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk; Interval pressing has ensured that the wire distance of different layers is certain, and die cavity external application sealant sealing ensures that liquid glue can not flow out the gap between metal frame in follow-up injection process;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding, in the present embodiment, sulfidization molding adopts self-vulcanizing.
5) cutting: cut into the rubber plate of various thickness and even thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 2, evenly the silk density after cloth silk is 140 ± 15/cm 2.
Embodiment 2
As depicted in figs. 1 and 2, the anti-EMI silica gel liner that a kind of directed wire of the present embodiment is filled, comprises colloidal silica 1, and described colloidal silica interior orientation is evenly distributed with wire 2.Wire 2 is Monel silk, and string diameter is 0.1mm, is pressed into sinusoidal.
Wherein, the peak height of sine-shaped, sinusoidal Monel silk is 0.05mm
The preparation method of the anti-EMI silica gel liner that above-mentioned directed wire is filled, comprises the following steps:
1) Monel silk pre-treatment: Monel silk is pressed into sinusoidal, uses silane coupling agent treat surface after deoiling, ensure to there is enough bonding forces between wire and rubber;
2) even cloth silk: Monel silk uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk; Interval pressing has ensured that the wire distance of different layers is certain, and die cavity external application sealant sealing ensures that liquid glue can not flow out the gap between metal frame in follow-up injection process;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding, in the present embodiment, sulfidization molding adopts self-vulcanizing.
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 2, evenly the silk density after cloth silk is 125/cm 2.
Embodiment 3
As depicted in figs. 1 and 2, the anti-EMI silica gel liner that a kind of directed wire of the present embodiment is filled, comprises colloidal silica 1, and described colloidal silica interior orientation is evenly distributed with wire 2.Wire 2 is Monel silk, and string diameter is 0.2mm, is pressed into sinusoidal.
Wherein, the peak height of sine-shaped, sinusoidal Monel silk is 0.35mm.
The preparation method of the anti-EMI silica gel liner that above-mentioned directed wire is filled, comprises the following steps:
1) Monel silk pre-treatment: Monel silk is pressed into sinusoidal, uses silane coupling agent treat surface after deoiling, ensure to there is enough bonding forces between wire and rubber;
2) even cloth silk: Monel silk uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk; Interval pressing has ensured that the wire distance of different layers is certain, and die cavity external application sealant sealing ensures that liquid glue can not flow out the gap between metal frame in follow-up injection process;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding, in the present embodiment, sulfidization molding adopts high temperature vulcanized curing process.
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 2, evenly the silk density after cloth silk is 155/cm 2.
Embodiment 4
As depicted in figs. 1 and 2, the anti-EMI silica gel liner that a kind of directed wire of the present embodiment is filled, comprises colloidal silica 1, and described colloidal silica interior orientation is evenly distributed with wire 2.Wire 2 is aluminium wire, and string diameter is 0.15mm, is pressed into sinusoidal.
Wherein, the peak height of sine-shaped, sinusoidal aluminium wire is 0.20mm.
The preparation method of the anti-EMI silica gel liner that above-mentioned directed wire is filled, comprises the following steps:
1) aluminium wire pre-treatment: aluminium wire is pressed into sinusoidal, uses silane coupling agent treat surface after deoiling, ensure to there is enough bonding forces between wire and rubber;
2) even cloth silk: aluminium wire uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk; Interval pressing has ensured that the wire distance of different layers is certain, and die cavity external application sealant sealing ensures that liquid glue can not flow out the gap between metal frame in follow-up injection process;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding, in the present embodiment, sulfidization molding adopts self-vulcanizing.
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 2, evenly the silk density after cloth silk is 140 ± 15/cm 2.
Embodiment 5
As depicted in figs. 1 and 2, the anti-EMI silica gel liner that a kind of directed wire of the present embodiment is filled, comprises colloidal silica 1, and described colloidal silica interior orientation is evenly distributed with wire 2.Wire 2 is aluminium wire, and string diameter is 0.1mm, is pressed into sinusoidal.
Wherein, the peak height of sine-shaped, sinusoidal aluminium wire is 0.05mm.
The preparation method of the anti-EMI silica gel liner that above-mentioned directed wire is filled, comprises the following steps:
1) aluminium wire pre-treatment: aluminium wire is pressed into sinusoidal, uses silane coupling agent treat surface after deoiling, ensure to there is enough bonding forces between wire and rubber;
2) even cloth silk: aluminium wire uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk; Interval pressing has ensured that the wire distance of different layers is certain, and die cavity external application sealant sealing ensures that liquid glue can not flow out the gap between metal frame in follow-up injection process;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding, in the present embodiment, sulfidization molding adopts self-vulcanizing.
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 2, evenly the silk density after cloth silk is 125/cm 2.
Embodiment 6
As depicted in figs. 1 and 2, the anti-EMI silica gel liner that a kind of directed wire of the present embodiment is filled, comprises colloidal silica 1, and described colloidal silica interior orientation is evenly distributed with wire 2.Wire 2 is aluminium wire, and string diameter is 0.2mm, is pressed into sinusoidal.
Wherein, the peak height of sine-shaped, sinusoidal aluminium wire is 0.35mm.
The preparation method of the anti-EMI silica gel liner that above-mentioned directed wire is filled, comprises the following steps:
1) aluminium wire pre-treatment: aluminium wire is pressed into sinusoidal, uses silane coupling agent treat surface after deoiling, ensure to there is enough bonding forces between wire and rubber;
2) even cloth silk: aluminium wire uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk; Interval pressing has ensured that the wire distance of different layers is certain, and die cavity external application sealant sealing ensures that liquid glue can not flow out the gap between metal frame in follow-up injection process;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding, in the present embodiment, sulfidization molding adopts high temperature vulcanized curing process.
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
Wherein, in step 2, evenly the silk density after cloth silk is 155/cm 2
? Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Tensile strength >=1.8MPa 2.0 2.2 1.9 2.1 2.3 2.0
Elongation >=200% 220 240 210 230 250 220
Hardness A35 ± 5 35 32 38 36 34 39
Tear strength >=8Kg/cm 11 12 10 12 13 10
140 ± 15/cm of silk density 2 140 125 155 140 125 155
Shield effectiveness (14KHZ~1GHZ) >=60dB 70 65 80 60 70 80
As can be seen from the above table, silica gel liner prepared by the present invention has not only retained the original performance of silica gel, and its tensile strength, tear strength are higher, and resistivity is 10 -2~10 -3between Ω cm, can play good anti-EMI effect.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (7)

1. the anti-EMI silica gel liner that directed wire is filled, is characterized in that, comprise colloidal silica, described colloidal silica interior orientation is evenly distributed with wire.
2. the anti-EMI silica gel liner that a kind of directed wire according to claim 1 is filled, is characterized in that, described wire is Monel silk or aluminium wire.
3. the anti-EMI silica gel liner that a kind of directed wire according to claim 2 is filled, is characterized in that, the string diameter of described Monel silk or aluminium wire is 0.1~0.2mm.
4. the anti-EMI silica gel liner that a kind of directed wire according to claim 2 is filled, is characterized in that, described Monel silk or aluminium wire are for being pressed into sine-shaped, sinusoidal Monel silk or aluminium wire.
5. the anti-EMI silica gel liner that a kind of directed wire according to claim 4 is filled, is characterized in that, the peak height of described sine-shaped, sinusoidal Monel silk or aluminium wire is 0.05~0.35mm.
6. a preparation method for the anti-EMI silica gel liner that the directed wire described in claim 1~5 any one is filled, is characterized in that, comprises the following steps:
1) wire pre-treatment: after wire is deoiled by silane coupling agent or titanate coupling agent treat surface;
2) even cloth silk: wire uniform winding, on rectangular metal frame, is twined to the metal frame and the metal frame interval pressing that does not twine silk, die cavity external application sealant sealing of silk;
3) injecting glue: liquid glue is arranged in stirrer to bubble, then filled film chamber, die cavity is placed in to vacuum row bubble machine row bubble;
4) sulfidization molding;
5) cutting: cut into the rubber plate of various thickness according to customer demand, cut direction is perpendicular to row's silk direction.
7. the preparation method of the anti-EMI silica gel liner that a kind of directed wire according to claim 6 is filled, is characterized in that: in described step 2, evenly the silk density after cloth silk is 140 ± 15/cm 2.
CN201410162804.1A 2014-04-22 2014-04-22 Directional metal wire-filled anti-EMI silica gel liner and preparation method thereof Active CN103980711B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106976188A (en) * 2016-01-18 2017-07-25 深圳市海德讯科技有限公司 Thermal transfer conducting resinl pads forming method in a kind of high-accuracy mould
CN110894359A (en) * 2019-12-05 2020-03-20 中国电子科技集团公司第三十三研究所 Sponge type directional conductive rubber and preparation method thereof
CN112908528A (en) * 2020-12-10 2021-06-04 睿惢思工业科技(苏州)有限公司 Conductive foam and manufacturing process thereof

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Publication number Priority date Publication date Assignee Title
JPH1153956A (en) * 1997-08-07 1999-02-26 Sumitomo Wiring Syst Ltd Emi suppressing cable
CN103571215A (en) * 2012-07-18 2014-02-12 天瑞企业股份有限公司 High thermal conductivity and EMI sheltering high polymer composite material
CN103602072A (en) * 2013-11-29 2014-02-26 国家电网公司 Conductive silicone rubber with electromagnetic shielding performance and manufacturing method

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JPH1153956A (en) * 1997-08-07 1999-02-26 Sumitomo Wiring Syst Ltd Emi suppressing cable
CN103571215A (en) * 2012-07-18 2014-02-12 天瑞企业股份有限公司 High thermal conductivity and EMI sheltering high polymer composite material
CN103602072A (en) * 2013-11-29 2014-02-26 国家电网公司 Conductive silicone rubber with electromagnetic shielding performance and manufacturing method

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106976188A (en) * 2016-01-18 2017-07-25 深圳市海德讯科技有限公司 Thermal transfer conducting resinl pads forming method in a kind of high-accuracy mould
CN110894359A (en) * 2019-12-05 2020-03-20 中国电子科技集团公司第三十三研究所 Sponge type directional conductive rubber and preparation method thereof
CN112908528A (en) * 2020-12-10 2021-06-04 睿惢思工业科技(苏州)有限公司 Conductive foam and manufacturing process thereof
CN112908528B (en) * 2020-12-10 2023-02-10 睿惢思工业科技(苏州)有限公司 Conductive foam and manufacturing process thereof

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