JPH05290374A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPH05290374A JPH05290374A JP10912892A JP10912892A JPH05290374A JP H05290374 A JPH05290374 A JP H05290374A JP 10912892 A JP10912892 A JP 10912892A JP 10912892 A JP10912892 A JP 10912892A JP H05290374 A JPH05290374 A JP H05290374A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- magnetic
- recording medium
- magnets
- upward direction
- 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
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は電磁変換特性の優れた
磁気記録ビデオテープの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a magnetic recording video tape having excellent electromagnetic conversion characteristics.
【０００２】[0002]
【従来の技術】オーディオ、ビデオ信号の磁気記録媒体
には大別して磁性体を塗布したもの（塗布型）と蒸着し
たもの（蒸着型）とが現存する。塗布型の磁性体は針状
微粒子であって、従来の塗布型では支持体上に磁性粒子
を塗布後、直ちに２個の対極磁石間を通過させる方法に
より粒子の長軸（磁化容易軸）を塗布方向に配向させて
いる（面内配向−図１）。BACKGROUND ART Magnetic recording media for audio and video signals are roughly classified into those coated with a magnetic material (coating type) and those deposited by evaporation (vapor deposition type). The coating type magnetic substance is acicular fine particles, and in the conventional coating type, the major axis (easy axis of magnetization) of the particle is set by a method in which magnetic particles are immediately applied onto a support and then immediately passed between two counter magnets. It is oriented in the coating direction (in-plane orientation-Fig. 1).
【０００３】一方、磁性体材料を真空中で蒸発させ支持
体上に堆積させる方法を採る蒸着型では、磁性体は特別
な配向処理を施さなくても堆積粒子が支持体面から斜め
上方に立ち上がった柱状の形になっている（斜め配向−
図２）。On the other hand, in the vapor deposition type which employs a method of evaporating a magnetic material in a vacuum and depositing it on a support, the deposited particles rise obliquely upward from the surface of the support even if no special orientation treatment is applied to the magnetic material. It has a columnar shape (oblique orientation-
(Fig. 2).
【０００４】[0004]
【発明が解決しようとする課題】ところで、同じ磁気特
性を有する条件下で両者の電磁変換特性を比べてみると
蒸着型の方が優れているが、その理由として前記磁性体
の配向形態の違いが考えられ、面内より斜めに配向して
いる方が好ましいと言える。また信学技報のＭＲ９１−
６、９（１９９１）に発表されている「記算機シミュレ
ーションによる斜め配向媒体の記録機構、記録特性の解
析」においても３０°斜め配向している状態で最も高い
再生出力が得られる、と結論されており、理論的にも斜
め配向の優利さが裏付けされている。By the way, comparing the electromagnetic conversion characteristics of the two under the condition of having the same magnetic characteristics, the vapor deposition type is superior, but the reason is that the orientation form of the magnetic body is different. Therefore, it can be said that it is preferable that the orientation is oblique rather than in-plane. In addition, the technical report MR91-
6, 9 (1991), "Analysis of recording mechanism and recording characteristics of obliquely oriented media by computer simulation" also concludes that the highest reproduction output can be obtained with 30 ° oblique orientation. The theoretical advantage of the oblique orientation is confirmed.
【０００５】ところで、斜め配向の手段についていまだ
公知の資料は存在しないが、次のような手段を容易に思
いつく。すなわちＮ−Ｓ極対向磁石を用いて磁石間に垂
直磁界を発生させ、この磁場内に磁性粒子を導いて支持
体面から垂直に立たせた後磁界外に引き出し、重力によ
る支持体面側に倒れる力と塗膜の乾燥度合によって定ま
る粘性抵抗力との釣合により、ある傾斜角度に保持させ
るというものである。しかし実験の結果、粒子は常に望
ましい方向である塗布方向に向いて傾斜するとは限らな
いこと、また傾斜角度も実験ロットごとに異なること等
の欠点のあることが判明した。By the way, there is no known material for the oblique orientation means, but the following means can be easily conceived. That is, a vertical magnetic field is generated between the magnets by using N-S pole facing magnets, and magnetic particles are guided into the magnetic field to stand vertically from the support surface and then drawn out of the magnetic field. The film is held at a certain inclination angle in balance with the viscous resistance that is determined by the degree of dryness of the coating film. However, as a result of experiments, it was found that particles do not always incline toward the coating direction, which is a desirable direction, and that the inclination angle is different for each experimental lot.
【０００６】[0006]
【問題点を解決するための手段】そこで発明者はコンピ
ュータを用いた有限要素法により２つの磁石間に発生す
る磁界の形態をいろいろシミュレートした結果、図３に
示した如く直方体形の磁石３、３の稜に対してθの角度
をもって斜め着磁したものを近接して平行に配置した
時、磁石間にθの角度の斜め磁界が発生することを見い
出した。実験の結果、シミュレーション通りの斜め方向
磁界の存在をガウスメータにて確認し、また磁性粒子が
塗布方向に向いて傾斜配向していることを磁気測定によ
り確認して本発明に至ったものである。The inventor has simulated various magnetic field forms generated between two magnets by the finite element method using a computer. It was found that an oblique magnetic field having an angle of θ is generated between the magnets when the magnets obliquely magnetized at an angle of θ with respect to the ridge 3 are arranged in parallel in close proximity. As a result of the experiment, the present invention was accomplished by confirming the presence of a diagonal magnetic field as simulated by a Gauss meter, and confirming by magnetic measurement that the magnetic particles are inclined and oriented toward the coating direction.
【０００７】すなわち、本発明は磁性粒子を含んだ塗布
型磁気記録媒体の製造において、磁性粒子の磁化容易軸
を支持体面から斜め上方向に配向させる手段として、斜
め上方向に着磁した直方体型磁石を２個対向させて設置
し、その間隙に流動性を有する塗膜を通過させるように
したことを特徴とする。That is, the present invention is a rectangular parallelepiped type magnetized in an obliquely upward direction as a means for orienting the easy axis of magnetization of the magnetic particles in an obliquely upward direction from the surface of the support in the production of a coating type magnetic recording medium containing magnetic particles. It is characterized in that two magnets are placed facing each other, and a coating film having fluidity is passed through the gap.
【０００８】[0008]
【実施例】次に本発明を実施例および比較例により具体
的に説明する。 実施例１ 作製した磁石の素材は磁束密度１２ＫガウスのＮｄ−Ｆ
ｅ−Ｂ系の希土類磁石である。これを１０ｃｍ×５ｃｍ
×２０ｃｍの直方体に成形した後１０cmの稜から３０度
傾けた方向に３０Ｋエルステッドのパルス磁界で着磁
し、２個の磁石を１０ｃｍ×２０ｃｍの面が対向するよ
うに１cmの間隙をおいて着磁方向が互いに平行となるよ
う配置してから両者を非磁性金属で固定した。間隙中心
の磁界の大きさは４６００ガウスであった。EXAMPLES Next, the present invention will be specifically described with reference to Examples and Comparative Examples. Example 1 The material of the manufactured magnet is Nd-F having a magnetic flux density of 12 K gauss.
It is an e-B type rare earth magnet. 10 cm x 5 cm
After forming into a rectangular parallelepiped of 20 cm, magnetize with a pulse magnetic field of 30 K oersted in a direction tilted 30 degrees from the edge of 10 cm, and attach two magnets with a gap of 1 cm so that the faces of 10 cm x 20 cm face each other. After arranging so that the magnetic directions were parallel to each other, both were fixed with a non-magnetic metal. The magnitude of the magnetic field at the center of the gap was 4600 gauss.
【０００９】次に下記組成の磁性塗料を作製し、厚さ１
２μのポリエステルフィルム上に１００ｍ／ｍｉｎのス
ピードで塗布した後、乾燥炉内に１０ｃｍの稜に平行な
方向がフィルムの進行方向になり、２０ｃｍの稜がフィ
ルムの幅方向になるように配置した前記配向磁石３、３
の間を図３に鎖線で示した方向に通過させて磁性粒子を
斜め配向させてから乾燥し、カレンダー加工を施した
後、1/2 インチ幅に切断してビデオテープを得た。 Next, a magnetic paint having the following composition was prepared, and a thickness of 1
After coating on a polyester film of 2 μm at a speed of 100 m / min, the film was arranged in a drying oven so that the direction parallel to the 10 cm ridge was the traveling direction of the film and the 20 cm ridge was the width direction of the film. Oriented magnets 3, 3
3 was passed in the direction indicated by the chain line in FIG. 3 to obliquely orient the magnetic particles, dried, calendered and then cut into 1/2 inch width to obtain a video tape.
【００１０】実施例２ 着磁角度が６０度である以外は実施例１と同じ製造方法
にてビデオテープを得た。Example 2 A video tape was obtained by the same manufacturing method as in Example 1 except that the magnetization angle was 60 degrees.
【００１１】[0011]
【比較例】配向用磁石が従来のＮ−Ｎ極対向である以外
は実施例１と同じ製造方法にてビデオテープを得た。得
られた各ビデオテープに対しソニー製デッキＥＶ−Ｓ９
００を用いて電磁変換特性を測定した。この結果は表１
に示した通りである。なお、電磁変換特性は比較例を基
準として表示した。Comparative Example A video tape was obtained by the same manufacturing method as in Example 1 except that the orienting magnet was a conventional N-N pole facing. Sony-made deck EV-S9 for each obtained video tape
00 was used to measure the electromagnetic conversion characteristics. This result is shown in Table 1.
As shown in. The electromagnetic conversion characteristics are shown with the comparative example as a reference.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【発明の作用効果】表１より実施例は比較例より優れた
特性が得られており本発明の効果は明らかである。本発
明は単に斜め着磁した２個の磁石を対向させて配置する
だけで優れた磁場配向装置を構成できる利点が得られ
る。The effects of the present invention are clear from Table 1, which shows that the examples have better characteristics than the comparative examples. The present invention has the advantage that an excellent magnetic field orientation apparatus can be constructed by simply disposing two magnets that are obliquely magnetized so as to face each other.
【図１】面内配向の磁気記録媒体の断面を示す模式図で
ある。FIG. 1 is a schematic view showing a cross section of an in-plane oriented magnetic recording medium.
【図２】斜め配向の磁気記録媒体の断面を示す模式図で
ある。FIG. 2 is a schematic view showing a cross section of an obliquely oriented magnetic recording medium.
【図３】本発明の実施例に係る磁石の着磁方向（矢印）
および該磁石の磁力線の様子を示すコンピュータシミュ
レーションの図である。FIG. 3 is a magnetization direction (arrow) of a magnet according to an embodiment of the present invention.
It is a figure of the computer simulation which shows the mode of the magnetic force line of this magnet.
３、３ 稜に対してθの角度をもって斜め着磁して平行
に配置した直方体形磁石A rectangular parallelepiped magnet that is obliquely magnetized at angles of 3 and 3 edges and arranged in parallel
Claims (1)
製造において、磁性粒子の磁化容易軸を支持体面から斜
め上方向に配向させる手段として、斜め上方向に着磁し
た直方体型磁石を２個対向させて設置し、その間隙に流
動性を有する塗膜を通過させるようにしたことを特徴と
する磁気記録媒体の製造方法。1. In the production of a coated magnetic recording medium containing magnetic particles, a rectangular parallelepiped magnet magnetized in an obliquely upward direction is used as a means for orienting the easy axis of magnetization of the magnetic particles in an obliquely upward direction from the support surface. A method for producing a magnetic recording medium, characterized in that the magnetic recording media are placed facing each other, and a coating film having fluidity is passed through the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10912892A JPH05290374A (en) | 1992-04-03 | 1992-04-03 | Production of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10912892A JPH05290374A (en) | 1992-04-03 | 1992-04-03 | Production of magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05290374A true JPH05290374A (en) | 1993-11-05 |
Family
ID=14502289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10912892A Pending JPH05290374A (en) | 1992-04-03 | 1992-04-03 | Production of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05290374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4922168B2 (en) * | 2004-09-15 | 2012-04-25 | オーセ プリンティング システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method and apparatus for converting source image data to target image data |
-
1992
- 1992-04-03 JP JP10912892A patent/JPH05290374A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4922168B2 (en) * | 2004-09-15 | 2012-04-25 | オーセ プリンティング システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method and apparatus for converting source image data to target image data |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20010529 |