JPS59146442A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS59146442A JPS59146442A JP58019653A JP1965383A JPS59146442A JP S59146442 A JPS59146442 A JP S59146442A JP 58019653 A JP58019653 A JP 58019653A JP 1965383 A JP1965383 A JP 1965383A JP S59146442 A JPS59146442 A JP S59146442A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- recording medium
- perfluoroalkyl polyether
- carboxyl group
- lubricant
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/72—Protective coatings, e.g. anti-static or antifriction
- G11B5/725—Protective coatings, e.g. anti-static or antifriction containing a lubricant, e.g. organic compounds
- G11B5/7253—Fluorocarbon lubricant
- G11B5/7257—Perfluoropolyether lubricant
Landscapes
- Lubricants (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ポリエステル、アルミナ等の基体に蒸着ある
いはスパッタ法等により磁性層を形成する磁気記録媒体
に関し、特に表面に潤滑性を与え、耐久性を大幅に向上
させるようにしたものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a magnetic recording medium in which a magnetic layer is formed on a substrate such as polyester or alumina by vapor deposition or sputtering. It is designed to significantly improve performance.
（従来例の構成と問題点）
従来のこの種の磁気記録媒体の潤滑剤としては、シリコ
ンオイルやパーフロロアルキルポリエーテル等が用いら
れ、これらをそのままあるいは希釈して表面に塗布ある
いは磁気記録媒体をこれらに浸漬することによって潤滑
作用を与えていた。しかし、これらの潤滑剤は、金属質
の磁気記録媒体との接着性が悪く、使用中に移行したり
して潤滑作用を失う。磁気記録媒体は、記録再生時に磁
気ヘッドと激しく摺接するため潤滑剤の移行により、急
激に磁性層や磁気ヘッドに傷がつき易くなり、また、磁
性層が摩耗されたりしてドロップアウトの原因となる。(Structure and problems of conventional example) Silicone oil, perfluoroalkyl polyether, etc. are used as lubricants for conventional magnetic recording media of this kind, and these are applied directly or diluted to the surface of the magnetic recording medium. By dipping it in these, a lubricating effect was provided. However, these lubricants have poor adhesion to metallic magnetic recording media, and may migrate during use and lose their lubricating effect. Because magnetic recording media come into violent sliding contact with the magnetic head during recording and playback, the transfer of lubricant can rapidly cause scratches on the magnetic layer and magnetic head, and the magnetic layer can also be worn out, causing dropouts. Become.
特に、この磁気記録媒体をフロッピーディスクと同様に
扱えば、磁気記録媒体は不織布を裏打ちした塩化ビニル
のジャケットに収納されているため、潤滑剤が不織布に
吸収されたりしてヘッド摺接部における潤滑作用が低下
し易く、一段とドロップアウトの原因となり易い。In particular, if you handle this magnetic recording medium in the same way as a floppy disk, since the magnetic recording medium is housed in a PVC jacket lined with non-woven fabric, the lubricant will be absorbed by the non-woven fabric and lubricate the head sliding contact area. The effect tends to decrease, and it is even more likely to cause dropout.
（発明の目的）
本発明はこのような従来の欠点を除去するもので、潤滑
剤と磁気記録媒体との接着力を増加し、潤滑剤の移行を
防ぎ、その結果、耐久性を大幅に改善することを可能に
した磁気記録媒体を提供することを目的とするものであ
る。(Objective of the Invention) The present invention eliminates these conventional drawbacks by increasing the adhesive force between the lubricant and the magnetic recording medium, preventing lubricant migration, and, as a result, significantly improving durability. The object of the present invention is to provide a magnetic recording medium that makes it possible to do this.
（発明の構成）
この目的を達成するために本発明は、パーフロロアルキ
ルポリエーテルの末端にカルボン酸基をつけ、潤滑剤と
磁気記録媒体との接着力を増すようにしたものである。(Structure of the Invention) In order to achieve this object, the present invention adds a carboxylic acid group to the end of perfluoroalkyl polyether to increase the adhesion between the lubricant and the magnetic recording medium.
これは、そのままであるいはフレオンで希釈して使用さ
れる。使用量は１〜２０重量％が望ましく、それ以下で
は十分な潤滑作用が得られず、またそれ以上では潤滑剤
による粘りが発生することがある。It is used neat or diluted with Freon. The amount used is preferably 1 to 20% by weight; if it is less than that, a sufficient lubricating effect cannot be obtained, and if it is more than that, stickiness may occur due to the lubricant.
（実施例の説明）
以下、本発明の実施例について説明する。スパッタ法に
より、コバルト−クロム合金を厚みが０．５μｍになる
ようにポリエステルフィルム上に形成し、磁気記録媒体
を作製した。これをディスク状に切りとりカルボン酸基
含有のパーフロロアルキルポリエーテル（デュポン社製
ＫＲＹＴＯＸ １５７ＦＳ）のフレオン溶液に３０秒浸
漬した後６０℃で１分間乾燥させ、不織布を裏打ちした
塩化ビニルのジャケットに収納する。フレオン溶液の組
成は表１（試料番号１〜４）のような割合とする。(Description of Examples) Examples of the present invention will be described below. A cobalt-chromium alloy was formed on a polyester film to a thickness of 0.5 μm by sputtering to produce a magnetic recording medium. This was cut into disk shapes, immersed in a Freon solution of perfluoroalkyl polyether containing carboxylic acid groups (KRYTOX 157FS manufactured by DuPont) for 30 seconds, dried at 60°C for 1 minute, and stored in a vinyl chloride jacket lined with non-woven fabric. do. The composition of the Freon solution is as shown in Table 1 (sample numbers 1 to 4).
次に、上記実施例（試料番号１〜４）によるディスクと
、実施例のカルボン酸基含有パーフロロアルキポリエー
テル（デュポン社製ＫＲＹＴＯＸ １５７ＦＳ）の替わ
りに、カルボン酸基を有しない単なるパーフロロアルキ
ルポリエーテル（デュポン社製ＫＲＹＴＯＸ１４３）を
用い、その他は実施例と全く同様にして作成したディス
ク（試料５〜８）との比較例について説明する。Next, in place of the disks according to the above examples (sample numbers 1 to 4) and the carboxylic acid group-containing perfluoroalkyl polyether (KRYTOX 157FS manufactured by DuPont) in the examples, a simple perfluoroalkyl compound having no carboxylic acid groups was used. Comparative examples with disks (Samples 5 to 8) made using polyether (KRYTOX143 manufactured by DuPont) and otherwise made in the same manner as in the Examples will be described.
表２に上記したそれぞれのディスクに磁気ヘッドを当て
て３００万パス時の出力減少、ドロップアウト、ディス
ク表面の傷等の発生を観察して行った耐久性試験の試験
結果を示したものである。Table 2 shows the test results of a durability test conducted by applying a magnetic head to each of the disks mentioned above and observing the occurrence of output reduction, dropouts, scratches on the disk surface, etc. after 3 million passes. .
この表２から明らかなようにＫＲＹＴＯＸ １４３を用
いたもの（試料番号５〜８）は、ディスク回転の遠心力
により潤滑剤が周囲に集まり磁気ヘッドの摺接部での潤
滑作用は失われている。ＫＲＹＴＯＸ １５７ＦＳを用
いたもの（試料番号１〜４）でも、試料番号１のものは
潤滑作用が十分でなくディスク表面に傷が入る。試料番
号４のものは潤滑剤が付着しすぎ、ディスク表面に粘り
が生ずるだけでなく、ジャケットの不織布にも若干移行
する。As is clear from Table 2, in those using KRYTOX 143 (sample numbers 5 to 8), the lubricant gathers around the circumference due to the centrifugal force of disk rotation, and the lubricating effect on the sliding contact area of the magnetic head is lost. . Even among those using KRYTOX 157FS (sample numbers 1 to 4), sample number 1 did not have sufficient lubrication and scratches appeared on the disk surface. In sample No. 4, too much lubricant adhered, and not only did the disk surface become sticky, but it also transferred to the nonwoven fabric of the jacket.
これに対し、試料番号２、３のものは、潤滑剤の移行が
なく、ディスク表面の粘りもなく、ディスク表面の傷、
ドロップアウトが全く生じていない。また、出力の低下
も全くない。したがって、本発明の場合、フレオン溶液
の濃度は１〜２０重量％が望ましい。On the other hand, with sample numbers 2 and 3, there was no lubricant transfer, no stickiness on the disk surface, and no scratches on the disk surface.
No dropouts occurred at all. Also, there is no decrease in output at all. Therefore, in the case of the present invention, the concentration of the Freon solution is preferably 1 to 20% by weight.
（発明の効果）
以上のように本発明によれば、長時間使用しても潤滑剤
の移行がなく、走行が安定でかつ耐久性に優れた磁気記
録媒体を得ることができる。(Effects of the Invention) As described above, according to the present invention, it is possible to obtain a magnetic recording medium that has no lubricant transfer even after long-term use, is stable in running, and has excellent durability.
Claims (1)
て作製される磁気記録媒体において、その表面にカルボ
ン酸基を含有するパーフロロアルキルポリエーテルを潤
滑剤として有することを特徴とする磁気記録媒体。1. A magnetic recording medium produced by forming a magnetic layer on a substrate by vapor deposition or sputtering, the magnetic recording medium having a perfluoroalkyl polyether containing a carboxylic acid group on its surface as a lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58019653A JPS59146442A (en) | 1983-02-10 | 1983-02-10 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58019653A JPS59146442A (en) | 1983-02-10 | 1983-02-10 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59146442A true JPS59146442A (en) | 1984-08-22 |
Family
ID=12005202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58019653A Pending JPS59146442A (en) | 1983-02-10 | 1983-02-10 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59146442A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61104319A (en) * | 1984-10-22 | 1986-05-22 | Nec Corp | Magnetic storage medium |
| JPH0249218A (en) * | 1988-05-31 | 1990-02-19 | Sony Corp | Magnetic recording medium |
-
1983
- 1983-02-10 JP JP58019653A patent/JPS59146442A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61104319A (en) * | 1984-10-22 | 1986-05-22 | Nec Corp | Magnetic storage medium |
| JPH0610868B2 (en) * | 1984-10-22 | 1994-02-09 | 日本電気株式会社 | Magnetic memory |
| JPH0249218A (en) * | 1988-05-31 | 1990-02-19 | Sony Corp | Magnetic recording medium |
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