JP2004172265A - Electromagnetic wave shielding material - Google Patents
Electromagnetic wave shielding material Download PDFInfo
- Publication number
- JP2004172265A JP2004172265A JP2002334815A JP2002334815A JP2004172265A JP 2004172265 A JP2004172265 A JP 2004172265A JP 2002334815 A JP2002334815 A JP 2002334815A JP 2002334815 A JP2002334815 A JP 2002334815A JP 2004172265 A JP2004172265 A JP 2004172265A
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- JP
- Japan
- Prior art keywords
- electromagnetic wave
- wave shielding
- shielding material
- sheet
- japanese paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、電磁波を遮蔽する遮蔽材に関するものであり、特に木質炭を利用したシート状の形態をなす遮蔽材に関するものである。
【0002】
【従来の技術】
情報化社会の進展により、電磁波を利活用する各種の通信機器、テレビ、電子レンジ、コンピューター、音響機器、計響機器等の電子機器が多数出回り、多くの人々が恩恵に浴している。
【0003】
一方、これらの機器からは、当然のこと不必要、余剰の電磁波が放散され、このため同等の機器類をはじめ多数の機械装置類に対し、通信障害が誤動作を生じせしめ、又私達の身体への障害(ペースメーカ設定者等)を起こすに至り、社会問題にもなりつつある。
【0004】
このような不必要、余剰の電磁波から障害等を防止するためには、発生源を最少限にする工夫と、例えば、金属導電体で電磁波発生源機器類を被覆し、不必要、余剰電磁波の放散放射等を防止することが行われている。
しかし、複雑な情報機器類を張り巡らすインテリジェントビル等、遮蔽対象規模の大きいものには、その遮蔽は極めて困難である。
又、携帯電話のように小型、軽量化指向の製品にあっては、金属被覆による電磁波防止は逆指向を示すことになる。
【0005】
このことから、軽量にて電磁波遮蔽が可能と考えられている中で、電磁波の遮蔽作用をもつ炭に関心が示され、微粉状の炭にバインダーを加えてシート状にすることが試みられている。
【0006】
例えば、特開2001ー189590ではトルマリンの微粉末と竹炭の微粉末と金属酸化物の微粉末を接着作用を有する結合材に混入した塗布剤とし、特開2000ー192373では炭と接着剤の混合物からなる層を下貼り紙に形成し、特開2000ー144949では木炭粉末をシート状に形成し、更に特開平10ー177083では紙又は布の上にニカワを塗布し、木炭の粒子を一面に張り付けたものとしている。
【0007】
【発明が解決しようとする課題】
そこで本発明は、従来のようにシート状の基材表面に炭の粉末を散着したり、バインダーと混合し、展伸してシート状に形成したりすることなく、純粋に炭のみでシート状の形態を成す電磁波遮蔽材を提供せんとするものである。
【0008】
【課題を解決するための手段】
本発明は、和紙糸で製織した織物地を炭化して電磁波遮蔽材としたものである。そして、和紙糸は30デニール以上の太さを有するものが好適である。
【0009】
和紙は、コウゾ、ミツマタ、ガンビ等の植物を原料とする木質材であり、細巾に裁断した和紙を糸状に撚ったものが和紙糸であるから、密度が高く、強靭な和紙糸となり、製織した織物地は木材と同様に炭化すれば炭と成って織物地の形態を維持したシート状の炭を得られるのである。
【0010】
又、和紙糸の太さを30デニール以上とすることで、炭化した場合に糸状を維持できる太さで残り、織物地の形態の維持が確実となるものである。
【0011】
【発明の実施の形態】
次に、本発明の実施の一形態を図面に基づいて説明する。
和紙糸は、和紙を適当巾に裁断して撚って糸状としたものであって、任意の太さに設定できる。
炭化することによって、撚った和紙糸1は多少収縮するけれど、30デニール以上であれば格別に太い糸として製織する必要はなく、ごく普通に用いられる範囲の太さの糸を選択してもよい。
【0012】
又、製織においても組織の限定はなく、基本的な平織2でも充分に炭化した後の組織をそのまま維持できるものであり、炭化は一般に行われている各種炭化方法の一を選択し、300℃乃至1,500℃の範囲で加熱することで炭化シート3を得られるものである。
【0013】
このようにして、炭化により得られた炭化シート3は、そのままの状態では破損する恐れがあるので、表裏面を別途織物紙等の補張材として被覆補強し、使用に供するようにする。
【0014】
図2は、和紙糸1を製織した織物地を炭化して得られた炭化シート3をサンドイッチ状に織物地4、5を表裏面に被覆して接着したものである。
織物地4、5は任意の糸で任意組織で製織したものであり、同一糸で同一組織の織物地であっても、異なる糸で異なる組織であってもよく、適宜織物地を選択してサンドイッチ状の構成とできるものである。
【0015】
更に、具体的には他人の携帯電話等よりの電磁波障害に対しては、当該被覆補強された炭化シートにより、チョッキ等を縫製し、それを着用して対処するものとする。
【0016】
【発明の効果】
本発明は、和紙糸を用いた織物等を炭化し、その炭の特性を生かし、電磁波の遮蔽を行うもので、軽量にして加工、取り扱いが容易な電磁波遮蔽の資材を提供するものである。したがって、他方面にわたりその特性、特長を生かし利用できるものである。
【図面の簡単な説明】
【図1】本発明の炭化物の一実施の形態を示す平面図である。
【図2】本発明のシート状製品の一実施の形態を示す断面図である。
【符号の説明】
1 和紙糸
2 平織
3 炭化シート
4、5 織物地[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shielding material for shielding electromagnetic waves, and more particularly to a shielding material in a sheet shape using wood charcoal.
[0002]
[Prior art]
With the progress of the information society, various electronic devices such as various communication devices, televisions, microwave ovens, computers, audio devices, and acoustic devices that utilize electromagnetic waves have appeared on the market, and many people have benefited.
[0003]
On the other hand, these devices naturally dissipate unnecessary and excess electromagnetic waves, which can cause malfunctions in communication with similar devices and many other mechanical devices, and also cause our body to malfunction. And cause social problems (peacemakers, etc.).
[0004]
In order to prevent such unnecessary and surplus electromagnetic waves from obstruction and the like, measures to minimize the generation source and, for example, covering the electromagnetic wave source equipment with metal conductors, It has been practiced to prevent radiated radiation and the like.
However, it is extremely difficult to shield a large-scale object such as an intelligent building in which complicated information devices are spread.
Further, in products that are small and light in weight, such as mobile phones, the prevention of electromagnetic waves by metal coating shows a backward directivity.
[0005]
From this, while it is thought that electromagnetic wave shielding is possible with light weight, interest has been shown in charcoal having an electromagnetic wave shielding effect, and it has been attempted to add a binder to fine powdered charcoal to form a sheet. I have.
[0006]
For example, in JP-A-2001-189590, a fine powder of tourmaline, a fine powder of bamboo charcoal, and a fine powder of metal oxide are used as an application agent mixed in a binder having an adhesive effect, and in JP-A-2000-192373, a mixture of charcoal and an adhesive is used. Is formed on a base paper, charcoal powder is formed into a sheet in JP-A-2000-144949, and glue is applied on paper or cloth in JP-A-10-1770083, and the charcoal particles are stuck on one surface. It is assumed that.
[0007]
[Problems to be solved by the invention]
Accordingly, the present invention provides a sheet made of pure charcoal alone without sprinkling charcoal powder on the surface of a sheet-like base material or mixing with a binder and expanding it to form a sheet as in the prior art. It is an object to provide an electromagnetic wave shielding material having a shape like a letter.
[0008]
[Means for Solving the Problems]
In the present invention, an electromagnetic wave shielding material is obtained by carbonizing a woven fabric woven with Japanese paper yarn. The washi thread preferably has a thickness of 30 denier or more.
[0009]
Washi is a wood material made from plants such as mulberry, mitsumata, gambi, and the like, and is obtained by twisting Japanese paper cut into narrow threads into a thread form. If the woven fabric is carbonized in the same manner as wood, it becomes charcoal and a sheet-like charcoal that maintains the form of the woven fabric can be obtained.
[0010]
Further, by setting the thickness of the Japanese paper thread to 30 denier or more, when carbonized, the thread remains in a thickness capable of maintaining the thread shape, and the form of the woven fabric is reliably maintained.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
The Japanese paper thread is obtained by cutting Japanese paper into a suitable width and twisting it into a thread shape, and can be set to any thickness.
By carbonizing, the twisted Japanese paper yarn 1 shrinks somewhat, but if it is 30 denier or more, it is not necessary to weave as a particularly thick yarn, and even if a yarn having a thickness in a range commonly used is selected. Good.
[0012]
Also, there is no limitation on the structure in weaving, and even the basic
[0013]
Since the carbonized
[0014]
FIG. 2 shows a carbonized
The
[0015]
More specifically, against electromagnetic interference from a mobile phone or the like of another person, a vest or the like is sewn with the carbon sheet reinforced with the coating and worn to wear it.
[0016]
【The invention's effect】
SUMMARY OF THE INVENTION The present invention carbonizes a woven fabric or the like using Japanese paper thread and shields electromagnetic waves by making use of the characteristics of the charcoal, and provides an electromagnetic wave shielding material that is lightweight and easy to process and handle. Therefore, it can be used by taking advantage of its characteristics and features over the other side.
[Brief description of the drawings]
FIG. 1 is a plan view showing one embodiment of a carbide according to the present invention.
FIG. 2 is a cross-sectional view showing one embodiment of the sheet-shaped product of the present invention.
[Explanation of symbols]
1
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002334815A JP4338959B2 (en) | 2002-11-19 | 2002-11-19 | Electromagnetic shielding material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002334815A JP4338959B2 (en) | 2002-11-19 | 2002-11-19 | Electromagnetic shielding material |
Publications (2)
Publication Number | Publication Date |
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JP2004172265A true JP2004172265A (en) | 2004-06-17 |
JP4338959B2 JP4338959B2 (en) | 2009-10-07 |
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Application Number | Title | Priority Date | Filing Date |
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JP2002334815A Expired - Fee Related JP4338959B2 (en) | 2002-11-19 | 2002-11-19 | Electromagnetic shielding material |
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JP (1) | JP4338959B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006321201A (en) * | 2005-05-20 | 2006-11-30 | Olympus Corp | Wood processing method and compressed wood product |
JP2006341871A (en) * | 2005-06-08 | 2006-12-21 | Yoshimitsu Nakagawa | Protective material for non-contact type recording medium, and ic card case |
JP2010163709A (en) * | 2009-01-14 | 2010-07-29 | Maeda Toshikatsu | Method for producing carbonized fabric and carbonized fabric |
-
2002
- 2002-11-19 JP JP2002334815A patent/JP4338959B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006321201A (en) * | 2005-05-20 | 2006-11-30 | Olympus Corp | Wood processing method and compressed wood product |
JP2006341871A (en) * | 2005-06-08 | 2006-12-21 | Yoshimitsu Nakagawa | Protective material for non-contact type recording medium, and ic card case |
JP2010163709A (en) * | 2009-01-14 | 2010-07-29 | Maeda Toshikatsu | Method for producing carbonized fabric and carbonized fabric |
Also Published As
Publication number | Publication date |
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JP4338959B2 (en) | 2009-10-07 |
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