CN101628436B - Electromagnetic wave shielding composite board and manufacturing method thereof - Google Patents
Electromagnetic wave shielding composite board and manufacturing method thereof Download PDFInfo
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- CN101628436B CN101628436B CN2009100948179A CN200910094817A CN101628436B CN 101628436 B CN101628436 B CN 101628436B CN 2009100948179 A CN2009100948179 A CN 2009100948179A CN 200910094817 A CN200910094817 A CN 200910094817A CN 101628436 B CN101628436 B CN 101628436B
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Abstract
The invention relates to an electromagnetic wave shielding composite board and a manufacturing method thereof, and the electromagnetic wave shielding composite board belongs to composite boards designed for shielding electromagnetic waves. A surface layer and a bottom layer of the composite board are a wood board or a veneer or a bamboo mat or a bamboo curtain and the like, at least a layer of conductive fiber cloth as a sandwich layer is arranged between the surface layer and the bottom layer, or the sandwich layer is superposed in layers by the conductive fiber cloth and supporting layers, and the supporting layers are thin layers which are homogeneous or heterogeneous with the surface layer. The method comprises the following steps: spreading an adhesive onto the inner sides of the surface layer and the bottom layer as well as both sides of each supporting layer, or dipping the supporting layers with the adhesive, assembling the supporting layers and the conductive fiber cloth, and then cold pressing or/and hot pressing until the thickness of the electromagnetic wave shielding composite board is 3-30mm in thickness. The composite board has good electric conductivity, high yield strength, moisture resistance and excellent electromagnetic wave shielding performance.
Description
Technical field
The invention belongs to and be the shielding electromagnetic wave. the composite plate that designs.
Background technology
Conductive fibre fabric is good electromagnetic shielding material, because of material has coat of metal characteristics called after conductive fibre fabric, its making production technology be with fiber cloth (general commonly used poly-vinegar fiber cloth) through imposing electroplated metal layer after the pre-process and make it have metallic character and becoming conductive fibre fabric, it has characteristics such as good electric conductivity, hear resistance and lightweight.The density uniform conductive heat conduction felt that the Metafil felt of producing as U.S. Industries is made by hot sticky mode by chromium plating E glass fibre, glass mat need make it be attached at substrate surface with resin and other base material mold, and simple conductive fibre fabric tensile yield strength is low, cracky and the certain moisture rate is arranged.
Summary of the invention
The objective of the invention is to utilize the sandwich layer of conductive fibre fabric, thereby provide a kind of shielding electromagnetic composite plate as composite plate.
Another object of the present invention is based on above-mentioned multi-layer sheet with conductive fibre fabric and carries out assembly with stick, through pressing the assembly material that comprises one deck conductive fibre fabric is at least tightened together, thereby a kind of method that this shields electromagnetic composite plate of making is provided.
Purpose of the present invention realizes by following technical measures:
A kind of electromagnetic wave shielding composite board, the surface layer of this composite plate and bottom are plank or glued board or bamboo mat or bamboo curtain splint or medium density fibre board (MDF) or high density fiberboard or particieboard, have one deck conductive fibre fabric at least as sandwich layer between surface layer and bottom.
The sandwich layer of described composite plate is that conductive fibre fabric and supporting layer layering are superimposed, and wherein, supporting layer is and the thin layer surface layer homogeneity or inhomogeneous.
The surface layer of described composite plate and the thickness of bottom are 0.1mm～3.0mm.
The conductive fibre fabric surface impedance value of described composite plate: 0.05 Ω/mo, mechanical test under the 0.5kgf condition; Friction valve:＞1000000 wear-resisting cycles; Shield effectiveness: 20MHz～10GHz average attenuation 115dB when coating is 6mm * 10mm.
A kind of method of making above electromagnetic wave shielding composite board, this method comprises following processing step:
(1) medial surface of surface layer and bottom and supporting layer two sides coating adhesive or supporting layer adhesive-dipping;
(2) cold pressing or/and this assembly material of hot pressing, wherein, the unit pressure of colding pressing is 0.6Mpa～4.0Mpa, the time of colding pressing to be 5 minutes～60 minutes; The hot pressing unit pressure is that 0.8Mpa～4.0Mpa, temperature are that 70 ℃～150 ℃, hot pressing time are every square millimeter of 50s～70s.
Described colding pressing or/and hot pressing to this electromagnetic wave shielding composite board thickness is 3mm～30mm.
The English name of above-mentioned conductive fibre fabric surface impedance value unit is ohm/mo Test machine (0.5kgf); Friction valve is Wear cycle; Shield effectiveness is Gasket at 6mm * 10mm Average115dB from 20MHz to 10GHz.As when having different physical definition, then with this English standard by name.
Above-mentioned sandwich layer is meant all material between surface layer and bottom.
Above-mentioned supporting layer is meant as sandwich layer and is embedded between surface layer and the bottom, and makes it be stretched in the flaky material or the Web materials of the whole area of this composite plate by adhesive connection conductive fibre fabric.When flaky material or Web materials are identical with surface material, be called homogeneity, otherwise, be called inhomogeneous.
The present invention utilizes the packing material of conductive fibre fabric as composite plate, overcome the low and shortcoming of cracky and moisture absorption of simple conductive fibre fabric tensile yield strength, have conduction, yield strength height, damp-proof characteristics, both had a good electromagnetic wave shielding electric property, has mechanical property preferably again, the construction material that can be directly disturbs as military affairs or other field anti-electromagnetic wave, and make the electronic equipment operate as normal, avoid related personnel's health injured by intermediate frequency and frequency electromagnetic waves, reduce the pollution of electromagnetic wave environment.
The present invention is described further by the following example, and embodiment does not limit protection scope of the present invention.
The specific embodiment
Embodiment 1: behind the assembly by colding pressing and wooden electromagnetic interference shield composite plate is produced in hot pressing.
It is central layer that panel and base plate adopt wood based panel, its supporting layer, and thickness is 1.9mm.Except that panel and base plate, sandwich layer is with 5 layers of superimposed assembly that carries out of layering, wherein central layer double spread, panel and base plate single spreading.During assembly, every be placed with a conductive fibre fabric between two-layer, have 5 conductive fibre fabric; After assembly was finished, through colding pressing, the unit pressure of colding pressing was that 1.0Mpa, the time of colding pressing are 20 minutes, enters hot press again, and hot pressing time is 25 minutes, and temperature is 110 ℃; Pressure 1.2Mpa.Electromagnetic interference shield glued board thickness after the hot pressing is 12mm.
Embodiment 2: produce bamboo matter electromagnetic interference shield composite plate by hot pressing behind the assembly.
It is 1.2mm that panel and base plate adopt bamboo mat, bamboo mat thickness; Bamboo curtain splint thickness is 1.0mm; Its supporting layer is long bamboo curtain splint, short bamboo curtain splint.Except that panel and base plate, sandwich layer is with 7 layers of superimposed assembly that carries out of layering, and wherein long bamboo curtain splint, short bamboo curtain splint adopt impregnation mode impregnation, bamboo mat single spreading.During assembly, the 1st layer is bamboo mat, and the 2nd layer is long bamboo curtain splint, and the 3rd layer is short bamboo curtain splint, puts a conductive fibre fabric above the then short bamboo curtain splint, and the 4th layer is long bamboo curtain splint, and the 5th layer is short bamboo curtain splint, repaves a conductive fibre fabric above, by that analogy, spreads 9 layers altogether.After assembly is good, enter hot press hot pressing, hot pressing time 60 seconds, temperature is 140 ℃; Pressure 3.0Mpa.Electromagnetic interference shield glued board thickness after the hot pressing is 8mm.
Embodiment 3: behind the assembly by colding pressing and hot pressing producd fibers plate electromagnetic interference shield composite plate.
Panel and base plate all adopt the thick medium density fibre board (MDF) of 2.0mm that is; The second layer is with the conductive fabric of two-sided coating adhesive, the 3rd layer is adopted the thick medium density fibre board (MDF) of 2.0mm, the 4th layer of conductive fabric that adopts two-sided coating adhesive sent into cold press and carried out cold moudling for totally 5 layers behind overlapping assembly, the unit pressure of colding pressing is that 2.0Mpa, the time of colding pressing are 20 minutes; Send into hot press after colding pressing and carry out thermocompression forming, hot pressing temperature is 100 ℃, and hot pressing time is 10 minutes-25 minutes, and Best Times is 15 minutes.
Embodiment 4: behind the assembly by colding pressing and wooden electromagnetic interference shield composite plate is produced in hot pressing.
It is 1.9mm that panel and base plate adopt wood based panel, thickness, and its supporting layer is and the inhomogeneous bamboo mat of panel.Except that panel and base plate, sandwich layer is with 5 layers of superimposed assembly that carries out of layering, and wherein bamboo mat is a double spread, panel and base plate single spreading.During assembly, every be placed with a conductive fibre fabric between two-layer, have 5 conductive fibre fabric; After assembly was finished, through colding pressing, the unit pressure of colding pressing was that 3.5Mpa, the time of colding pressing are 30 minutes, enters hot press again, and hot pressing time is 25 minutes, and temperature is 130 ℃; Pressure 3.0Mpa.Electromagnetic interference shield glued board thickness after the hot pressing is 15mm.
Embodiment 5: make fibre board use in producing the electromagnetic interference shield composite plate by colding pressing behind the assembly.
Panel and base plate all adopt the thick medium density fibre board (MDF) of 2.0mm that is; The second layer is with the conductive fabric of two-sided coating adhesive, the 3rd layer is adopted the thick medium density fibre board (MDF) of 2.0mm, the 4th layer of conductive fabric that adopts two-sided coating adhesive sent into cold press and carried out cold moudling for totally 5 layers behind overlapping assembly, the unit pressure of colding pressing is that 3.5Mpa, the time of colding pressing are 60 minutes.
Among the above embodiment 1～5, conductive fibre fabric surface impedance value is 0.05 Ω/mo, mechanical test under the 0.5kgf condition; The wear-resisting cycle of friction valve＞1000000; 20MHz～10GHz average attenuation 115dB when shield effectiveness is 6mm * 10mm with the coating.
Claims (2)
1. electromagnetic wave shielding composite board, the surface layer of this composite plate and bottom are glued board or bamboo mat or bamboo curtain splint or medium density fibre board (MDF) or high density fiberboard or particieboard,
It is characterized in that:
Superimposed with conductive fibre fabric and supporting layer layering between surface layer and bottom as sandwich layer;
Wherein, supporting layer is and the thin layer surface layer homogeneity or inhomogeneous; Conductive fibre fabric surface impedance value: 0.05 Ω/mo, mechanical test under the 0.5kgf condition; Friction valve:＞1000000 wear-resisting cycles; Shield effectiveness: 20MHz～10GHz average attenuation 115dB when coating is 6mm * 10mm.
2. method of making electromagnetic wave shielding composite board as claimed in claim 1 is characterized in that this method comprises following processing step:
(1) medial surface of surface layer and bottom and supporting layer two sides coating adhesive or supporting layer adhesive-dipping;
(2) with surface layer, sandwich layer and bottom assembly, cold pressing or/and this assembly material of hot pressing, wherein, the unit pressure of colding pressing is 0.6Mpa～4.0Mpa, the time of colding pressing to be 5 minutes～60 minutes; The hot pressing unit pressure is that 0.8Mpa～4.0Mpa, temperature are that 70 ℃～150 ℃, hot pressing time are every square millimeter of 50s～70s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100948179A CN101628436B (en) | 2009-08-10 | 2009-08-10 | Electromagnetic wave shielding composite board and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100948179A CN101628436B (en) | 2009-08-10 | 2009-08-10 | Electromagnetic wave shielding composite board and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN101628436A CN101628436A (en) | 2010-01-20 |
| CN101628436B true CN101628436B (en) | 2011-05-11 |
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| CN2009100948179A Expired - Fee Related CN101628436B (en) | 2009-08-10 | 2009-08-10 | Electromagnetic wave shielding composite board and manufacturing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104400876B (en) * | 2014-10-20 | 2017-12-01 | 胡一鸿 | A kind of manufacture method of fiberboard |
| CN107310223A (en) * | 2017-07-12 | 2017-11-03 | 杭州治木科技有限公司 | A kind of wood composite magnetic sheet material and preparation method thereof |
| CN108513524A (en) * | 2018-04-18 | 2018-09-07 | 成都联腾动力控制技术有限公司 | A kind of New-energy electric vehicle high-strength magnetic shielding material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424899Y (en) * | 2000-06-02 | 2001-03-28 | 中国林业科学研究院木材工业研究所 | Artificial board with antistatic and electromagnetic shielding effect |
| CN2430260Y (en) * | 2000-06-02 | 2001-05-16 | 中国林业科学研究院木材工业研究所 | Composite veneer with electromagnetic shielding effection |
| CN1944007A (en) * | 2006-10-26 | 2007-04-11 | 王春鸣 | Composite artificial board and its preparing method |
| CN201160361Y (en) * | 2008-02-03 | 2008-12-03 | 赖仁寿 | Conductive fiber cloth for electromagnetic shielding |
| CN101456196A (en) * | 2008-08-28 | 2009-06-17 | 国家林业局北京林业机械研究所 | Lumber-core board and manufacture method thereof |
-
2009
- 2009-08-10 CN CN2009100948179A patent/CN101628436B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424899Y (en) * | 2000-06-02 | 2001-03-28 | 中国林业科学研究院木材工业研究所 | Artificial board with antistatic and electromagnetic shielding effect |
| CN2430260Y (en) * | 2000-06-02 | 2001-05-16 | 中国林业科学研究院木材工业研究所 | Composite veneer with electromagnetic shielding effection |
| CN1944007A (en) * | 2006-10-26 | 2007-04-11 | 王春鸣 | Composite artificial board and its preparing method |
| CN201160361Y (en) * | 2008-02-03 | 2008-12-03 | 赖仁寿 | Conductive fiber cloth for electromagnetic shielding |
| CN101456196A (en) * | 2008-08-28 | 2009-06-17 | 国家林业局北京林业机械研究所 | Lumber-core board and manufacture method thereof |
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| CN101628436A (en) | 2010-01-20 |
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