JPH08195307A - Low-magnetism magnetic sheet and manufacture thereof - Google Patents
Low-magnetism magnetic sheet and manufacture thereofInfo
- Publication number
- JPH08195307A JPH08195307A JP7077559A JP7755995A JPH08195307A JP H08195307 A JPH08195307 A JP H08195307A JP 7077559 A JP7077559 A JP 7077559A JP 7755995 A JP7755995 A JP 7755995A JP H08195307 A JPH08195307 A JP H08195307A
- Authority
- JP
- Japan
- Prior art keywords
- low
- magnetic sheet
- powder
- sheet
- magnetic
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/0027—Thick magnetic films
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
- A41B2400/00—Functions or special features of shirts, underwear, baby linen or handkerchiefs not provided for in other groups of this subclass
- A41B2400/34—Functions or special features of shirts, underwear, baby linen or handkerchiefs not provided for in other groups of this subclass antimicrobial or antibacterial
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Treatment Devices (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は磁束密度が４０ガウス以
下、特に２０ガウス以下の低磁力の磁気シートおよびそ
の製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic sheet having a magnetic flux density of 40 gausses or less, particularly 20 gausses or less, and a method for producing the same.
【０００２】[0002]
【従来の技術】本発明者は先の出願である特開平６−１
１８０６３号公報において、微弱磁気治療治具の製造法
を展開している。これは、腰椎椎間板ヘルニア、関節炎
などの痛い部分を、磁束密度が２０ガウス以下である低
磁気雰囲気にさらす治療法に用いられている。この使用
によって、腰椎椎間板ヘルニア、関節炎などの痛みを消
失させることに成功した。しかしこのような磁束密度を
有する磁石の数は非常に少ない。従来から知られている
低磁力磁石としては特開平５−３１５１６７号公報の低
磁力磁石があるが、磁束密度が５０ガウス以下という磁
石を作ることは容易ではない。微弱磁気治療治具に使用
できる低磁力の磁石の量産が望まれている。2. Description of the Related Art The present inventor has filed a prior application, JP-A-6-1.
Japanese Patent No. 18063 discloses a method for manufacturing a weak magnetic treatment jig. This is used for a treatment method in which a painful part such as a lumbar disc herniation or arthritis is exposed to a low magnetic atmosphere having a magnetic flux density of 20 gauss or less. With this use, we succeeded in eliminating pain such as lumbar disc herniation and arthritis. However, the number of magnets having such magnetic flux density is very small. As a conventionally known low magnetic force magnet, there is a low magnetic force magnet disclosed in JP-A-5-315167, but it is not easy to make a magnet having a magnetic flux density of 50 Gauss or less. Mass production of low-magnetism magnets that can be used in weak magnetic therapy jigs is desired.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、水の
処理（特開平４−１８５０３８号公報）や微弱磁気治療
治具（特開平６−１１８０６３号公報）に使用できる低
磁力の磁石およびそれを造るための製造方法を確立する
ことである。SUMMARY OF THE INVENTION An object of the present invention is to provide a low magnetic force magnet which can be used for water treatment (JP-A-4-185038) and a weak magnetic treatment jig (JP-A-6-118063). It is to establish the manufacturing method for making it.
【０００４】[0004]
【課題を解決するための手段】本発明は、磁化粉末薄層
と不織布とが積層されてなる、磁束密度が２〜４０ガウ
スの低磁力磁気シートに関する。より詳しくは、フェラ
イト粉末を合成樹脂または合成ゴムに分散させた磁化粉
末薄層と不織布とが積層されてなる上記の低磁力磁気シ
ートに関する。また、本発明は、フェライト微粉末を合
成樹脂または合成ゴム中に均一混合した分散体を不織布
に均一な厚さに薄層として塗布して形成したシート状構
成体に低磁場を印加してフェライト微粉末を磁化するこ
とを特徴とする低磁力磁気シートの製造方法に関する。The present invention relates to a low magnetic force magnetic sheet having a magnetic flux density of 2 to 40 gauss, which is formed by laminating a magnetized powder thin layer and a nonwoven fabric. More specifically, the present invention relates to the above-mentioned low magnetic force magnetic sheet formed by laminating a magnetized powder thin layer in which ferrite powder is dispersed in a synthetic resin or synthetic rubber and a non-woven fabric. Further, the present invention is to apply a low magnetic field to a ferrite by applying a low magnetic field to a sheet-like structure formed by applying a dispersion obtained by uniformly mixing ferrite fine powder in a synthetic resin or synthetic rubber to a nonwoven fabric as a thin layer. The present invention relates to a method for manufacturing a low magnetic force magnetic sheet, characterized by magnetizing fine powder.
【０００５】フェライトとしては、特に限定はなく、平
均粒径が１０〜４００μｍ、好ましくは１０〜１００μ
ｍの微粉末として使用する。The ferrite is not particularly limited and has an average particle size of 10 to 400 μm, preferably 10 to 100 μm.
m as a fine powder.
【０００６】本発明に使用する不織布は、綿、羊毛等の
天然繊維で造られたものでもよいし、ポリエチレン、ポ
リプロピレン、ナイロン、ポリエステル、アクリル、レ
ーヨン、アセテートのような合成繊維でつくられたもの
でもよい。また不織布のウェブ形態はランダムウェブ、
クロスウェブ、パラレルウェブのいずれでもよく、また
接着剤によって接合されたもの、機械的に接合されたも
の、スパンボンドのように直接融着によって接合された
もののいずれの方法によって作られたものでもよい。不
織布の厚さは用途により異なり特に制限されるものでは
ないが、一般には０.３〜３ｍｍの厚さが好ましい。The nonwoven fabric used in the present invention may be made of natural fibers such as cotton and wool, or may be made of synthetic fibers such as polyethylene, polypropylene, nylon, polyester, acrylic, rayon and acetate. But it's okay. Moreover, the web form of the non-woven fabric is a random web,
It may be either a cross web or a parallel web, or may be made by any method of being joined by an adhesive, mechanically joined, or directly fused such as spunbond. . The thickness of the non-woven fabric varies depending on the use and is not particularly limited, but generally a thickness of 0.3 to 3 mm is preferable.
【０００７】フェライト粉末を分散させる合成樹脂また
は合成ゴムは、特に制限されるものではなく、通常市販
されているものの中から選ぶことができる。中でも可撓
性のある材料が好ましく、例えば低密度ポリエチレン、
軟質ポリ塩化ビニル、酢酸ビニル、エチレン酢酸ビニル
共重合体、ポリウレタン、ポリブタジエンゴム、イソプ
レンゴム、ネオプレンゴム、ニトリルブタジエンゴム、
エチレンプロピレンゴム等が挙げられる。またこれら合
成樹脂および合成ゴムは不織布にそれ自体接着性を有す
るか、不織布への塗布時の溶液または液体分散状態で接
着性を有するものであればより好ましい。The synthetic resin or synthetic rubber in which the ferrite powder is dispersed is not particularly limited, and can be selected from commercially available products. Among them, a flexible material is preferable, for example, low density polyethylene,
Soft polyvinyl chloride, vinyl acetate, ethylene vinyl acetate copolymer, polyurethane, polybutadiene rubber, isoprene rubber, neoprene rubber, nitrile butadiene rubber,
Examples include ethylene propylene rubber and the like. Further, it is more preferable that these synthetic resins and synthetic rubbers have adhesiveness to the non-woven fabric per se, or have adhesiveness to the non-woven fabric in a solution or liquid dispersion state when applied to the non-woven fabric.
【０００８】合成樹脂または合成ゴムへのフェライト分
散体中に於けるフェライト粉末の濃度は、特に制限しな
いが、分散体をその好ましい厚さである０.３〜３ｍｍ
の厚さで不織布に塗布した場合に、フェライト粉末の面
密度が５０〜２５０ｇ／ｍ2とすることのできる濃度に
調製されればよい。The concentration of the ferrite powder in the ferrite dispersion on the synthetic resin or synthetic rubber is not particularly limited, but the dispersion has a preferable thickness of 0.3 to 3 mm.
When it is applied to a non-woven fabric with the above thickness, it may be prepared to have a concentration such that the surface density of the ferrite powder is 50 to 250 g / m 2 .
【０００９】本発明の低磁力磁気シートを製造するに
は、まずフェライト微粉末を合成樹脂または合成ゴム中
に均一混合した分散体を不織布に均一な厚さに薄層とし
て塗布してシート状の構成体を作成する。次いでこのシ
ート状構成体に着磁気装置により電圧を印加してフェラ
イトを磁化して低磁束密度を有する低磁力磁気シートを
得る。In order to produce the low magnetic force magnetic sheet of the present invention, first, a dispersion obtained by uniformly mixing ferrite fine powder in a synthetic resin or synthetic rubber is applied to a non-woven fabric as a thin layer in a uniform thickness to form a sheet. Create a construct. Then, a voltage is applied to this sheet-shaped structure by a magnetizing device to magnetize the ferrite to obtain a low magnetic force magnetic sheet having a low magnetic flux density.
【００１０】着磁電圧の大きさは、必要とする磁気の大
きさにより異なるが、例えばフェライトの面密度が２０
０ｇ／ｃｍ2の場合、磁束密度が１０ガウス前後の磁石
を必要とする場合は２５０Ｖ前後、２０ガウス前後の磁
石を必要とする場合は４５０Ｖ、また３０ガウス前後の
磁石を必要とする場合は７００Ｖ前後の電圧出力、また
フェライト量が１００ｇ／ｃｍ2の場合、磁束密度が１
０ガウス前後の磁石を必要とする場合は３００Ｖ前後、
１５ガウス前後の磁石を必要とする場合は４５０Ｖの電
圧出力で調整する。The magnitude of the magnetizing voltage depends on the magnitude of the required magnetism, but for example, the areal density of ferrite is 20.
At 0 g / cm 2 , when a magnet with a magnetic flux density of around 10 Gauss is required, it is around 250V, when a magnet with around 20 Gauss is required, it is 450V, and when a magnet with around 30 Gauss is required, it is 700V. When the voltage output before and after, and the amount of ferrite is 100 g / cm 2 , the magnetic flux density is 1
If you need a magnet around 0 Gauss, around 300V,
If a magnet of around 15 Gauss is required, adjust with a voltage output of 450V.
【００１１】磁気シートの構成は磁化粉末薄層と不織布
の２層構成でも、２枚の不織布の間に磁化微粉末を挟み
込んだ３層構成であってもよいが、後者がより好まし
い。The magnetic sheet may have a two-layer structure of a thin layer of magnetized powder and a non-woven fabric or a three-layer structure in which magnetized fine powder is sandwiched between two non-woven fabrics, but the latter is more preferable.
【００１２】[0012]
【実施例】以下実施例により本発明を説明する。実施例 １ エチレン酢酸ビニル系接着剤に平均粒径４５μｍのフェ
ライトを練り込み、これを２枚の木綿不織布の間に、フ
ェライトの面密度が約１００ｇ／ｍ2となるように塗布
した。乾燥して、シート状３層構成体を作成した後、こ
れを着磁気装置ＨＤ−１００（日本電磁測器（株）製）
により４５０Ｖの電圧を瞬時加えて着磁した。得られた
着磁シートの磁気の強さをＧＭ−１２２５型磁気測定器
（電子磁気工業（株）製）で測定した結果、磁束密度は
最大１６ガウスであり、低磁力磁気シートが得られてい
ることが確認できた。The present invention will be described with reference to the following examples. Example 1 Ferrite having an average particle size of 45 μm was kneaded into an ethylene vinyl acetate adhesive, and this was applied between two sheets of cotton nonwoven fabric so that the surface density of the ferrite was about 100 g / m 2 . After being dried to form a sheet-like three-layer structure, the magnetizing device HD-100 (manufactured by Nippon Electro-Magnetic Instruments Co., Ltd.)
Then, a voltage of 450 V was instantaneously applied to magnetize. The magnetic strength of the obtained magnetized sheet was measured with a GM-1225 type magnetometer (manufactured by Electronic Magnetic Industry Co., Ltd.). As a result, the magnetic flux density was 16 gauss at maximum, and a low magnetic force magnetic sheet was obtained. I was able to confirm that
【００１３】本磁気シートの効用を評価するために、同
時に採取した水道水を滅菌した２個のビーカーにそれぞ
れ入れ、外部からの雑菌が入らないようにビーカーの口
をポリエチレンフィルムでラップした後、一方のビーカ
ーを上記で得た磁気シートの上に置き、他方のビーカー
は木綿不織布の上に置いた。この状態で両ビーカーを２
５℃に保った高温室内に移し、３０日間静置した。３０
日後、それぞれのビーカーの中の水中の大腸菌の量を測
定した。本磁気シート上に置いたビーカー中の大腸菌の
量は試験開始日に測定した時の量よりもむしろ若干減少
していたが、木綿不織布上においたビーカー中の水の中
の大腸菌は著しく増殖していた。In order to evaluate the effect of this magnetic sheet, tap water collected at the same time was put into two sterilized beakers, and the mouth of the beaker was wrapped with a polyethylene film so as to prevent foreign bacteria from entering. One beaker was placed on the magnetic sheet obtained above and the other beaker was placed on the cotton non-woven fabric. 2 beakers in this state
It was transferred to a high temperature room kept at 5 ° C. and left standing for 30 days. 30
After a day, the amount of E. coli in the water in each beaker was measured. Although the amount of Escherichia coli in the beaker placed on this magnetic sheet was slightly reduced rather than the amount measured when the test was started, the E. coli in water in the beaker placed on the cotton non-woven fabric remarkably grew. Was there.
【００１４】実施例 ２ 弾性ポリウレタン接着剤に平均粒径７０μｍのフェライ
トを練り込み、これを２枚のポリエチレン不織布の間
に、フェライトの面密度が約１５０ｇ／ｍ2となるよう
に塗布した。乾燥して、シート状３層構成体を作成した
後、これを着磁気装置ＨＤ−１００（日本電磁測器
（株）製）により２７０Ｖの電圧を瞬時印加して着磁し
た。得られた着磁シートの磁束密度は１０ガウスであっ
た。 Example 2 Ferrite having an average particle size of 70 μm was kneaded into an elastic polyurethane adhesive, and this was applied between two polyethylene nonwoven fabrics so that the surface density of the ferrite was about 150 g / m 2 . After being dried, a sheet-shaped three-layer structure was prepared and then magnetized by instantaneously applying a voltage of 270 V by a magnetizing device HD-100 (manufactured by Nippon Electromagnetic Instruments Co., Ltd.). The magnetic flux density of the obtained magnetized sheet was 10 gauss.
【００１５】実施例 ３ 低磁力磁気シートでフェライト量２５０ｇ／ｍ2の場
合、磁電圧出力１０ＫＶで最大磁束密度１４０ガウス、
残留磁束密度８０ガウスで保磁力は４ＫＯｅであった。 Example 3 With a low magnetic force magnetic sheet and a ferrite amount of 250 g / m 2 , a maximum magnetic flux density of 140 gauss at a magnetic voltage output of 10 KV,
The residual magnetic flux density was 80 gauss and the coercive force was 4 KOe.
【００１６】[0016]
【発明の効果】本発明により、磁束密度が２〜４０ガウ
スという、従来得ることが困難であった低磁力の磁石が
容易に製造できる。またこうして得られた低磁力磁気シ
ートは水中の菌の増殖を防止する等の能力を有してい
る。According to the present invention, it is possible to easily manufacture a magnet having a magnetic flux density of 2 to 40 gauss and a low magnetic force, which has been difficult to obtain conventionally. The low magnetic force magnetic sheet thus obtained has the ability to prevent the growth of bacteria in water.
Claims (6)
る、磁束密度が２〜４０ガウスの低磁力磁気シート。1. A low magnetic force magnetic sheet having a magnetic flux density of 2 to 40 gauss, which is formed by laminating a thin layer of magnetized powder and a nonwoven fabric.
１に記載の低磁力磁気シート。2. The low magnetic force magnetic sheet according to claim 1, wherein the magnetic flux density is 2 to 20 Gauss.
合成樹脂または合成ゴムに分散させた薄層体である請求
項１または２に記載の低磁力磁気シート。3. The low magnetic force magnetic sheet according to claim 1, wherein the magnetized powder thin layer is a thin layered body in which ferrite magnetized powder is dispersed in a synthetic resin or a synthetic rubber.
2の面密度で存在する請求項３に記載の低磁力磁気シー
ト。4. The fine ferrite powder is 50 to 250 g / m 2.
The low magnetic force magnetic sheet according to claim 3, which is present at an areal density of 2 .
ゴム中に均一混合した分散体を不織布に均一な厚さに薄
層として塗布して形成したシート状構成体に低電圧を印
加してフェライト微粉末を磁化することを特徴とする請
求項１、２、３または４に記載の低磁力磁気シートの製
造方法。5. A sheet-like structure formed by applying a dispersion obtained by uniformly mixing fine ferrite powder in a synthetic resin or synthetic rubber to a non-woven fabric as a thin layer to form a fine ferrite powder by applying a low voltage. The method for producing a low magnetic force magnetic sheet according to claim 1, wherein the powder is magnetized.
2の面密度となるように分散体を塗布することを特徴と
する請求項５に記載の低磁力磁気シートの製造方法。6. The fine ferrite powder is 50 to 250 g / m 2.
The method for producing a low magnetic force magnetic sheet according to claim 5, wherein the dispersion is applied so as to have an areal density of 2 .
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7077559A JPH08195307A (en) | 1994-11-17 | 1995-04-03 | Low-magnetism magnetic sheet and manufacture thereof |
| AU45681/96A AU699437B2 (en) | 1995-02-23 | 1996-02-21 | Medical fabric goods |
| EP96301162A EP0728499A2 (en) | 1995-02-23 | 1996-02-21 | Medical fabric goods |
| KR19960004310A KR960030957A (en) | 1995-02-23 | 1996-02-23 | |
| US08/914,756 US6217505B1 (en) | 1995-02-23 | 1997-08-20 | Medical fabric goods |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-321819 | 1994-11-17 | ||
| JP32181994 | 1994-11-17 | ||
| JP7077559A JPH08195307A (en) | 1994-11-17 | 1995-04-03 | Low-magnetism magnetic sheet and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08195307A true JPH08195307A (en) | 1996-07-30 |
Family
ID=26418636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7077559A Pending JPH08195307A (en) | 1994-11-17 | 1995-04-03 | Low-magnetism magnetic sheet and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08195307A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029157A1 (en) * | 1997-12-08 | 1999-06-17 | Shinfuji Kogyo Kabushiki Kaisha | Method of promoting ripeness of fruit |
| JP2007236727A (en) * | 2006-03-10 | 2007-09-20 | Nihon Technical Development Center Co Ltd | Manufacturing method for medical magnetic sheet |
| JP2016093229A (en) * | 2014-11-12 | 2016-05-26 | 株式会社ユニカ | Magnetic treatment device |
| EP3192353A1 (en) * | 2016-01-12 | 2017-07-19 | FUJIFILM Corporation | Magnetic sheet for plant cultivation and method of plant cultivation |
-
1995
- 1995-04-03 JP JP7077559A patent/JPH08195307A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029157A1 (en) * | 1997-12-08 | 1999-06-17 | Shinfuji Kogyo Kabushiki Kaisha | Method of promoting ripeness of fruit |
| JP2007236727A (en) * | 2006-03-10 | 2007-09-20 | Nihon Technical Development Center Co Ltd | Manufacturing method for medical magnetic sheet |
| JP2016093229A (en) * | 2014-11-12 | 2016-05-26 | 株式会社ユニカ | Magnetic treatment device |
| EP3192353A1 (en) * | 2016-01-12 | 2017-07-19 | FUJIFILM Corporation | Magnetic sheet for plant cultivation and method of plant cultivation |
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