JPS59167849A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS59167849A JPS59167849A JP58041019A JP4101983A JPS59167849A JP S59167849 A JPS59167849 A JP S59167849A JP 58041019 A JP58041019 A JP 58041019A JP 4101983 A JP4101983 A JP 4101983A JP S59167849 A JPS59167849 A JP S59167849A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- layer
- recording medium
- magnetic recording
- corrosion resistance
- 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
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は記録素子として金属磁性材を使用した磁気記
録媒体に関し、その目的とするところは記録素子として
金属磁性材を使用した磁気記録媒体の耐蝕性を改善する
ところにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium using a metal magnetic material as a recording element, and its purpose is to improve the corrosion resistance of a magnetic recording medium using a metal magnetic material as a recording element. be.
プラスチック等のベース上に強磁性の金属薄膜層を蒸着
、スパッタリング法等によって形成したものは、空気中
の水分あるいは酸素などによる経時変化が大きい。すな
わち、耐蝕性が悪い。この耐蝕性を改善するため、金属
薄膜層の表面を薄くかつ均一に強制的に酸化する方法、
シリコーンオイルやその他無機系ないし有機系の被膜を
金属ｉ・η膜層の保護層として形成する方法などが種々
提案されているか、いずれも充分に満足できる結果は得
られていない。A ferromagnetic metal thin film layer formed on a base of plastic or the like by vapor deposition, sputtering, or the like is subject to large changes over time due to moisture or oxygen in the air. That is, the corrosion resistance is poor. In order to improve this corrosion resistance, there is a method of forcibly oxidizing the surface of the metal thin film layer thinly and uniformly.
Various methods have been proposed for forming silicone oil or other inorganic or organic coatings as a protective layer for the metal i/eta film layer, but none of them have yielded fully satisfactory results.
この発明者らは、上記観点から鋭意検討した結果、金属
磁性薄膜の如き金属磁性材を記録素子とする磁性層上に
特定のパーフルオロポリエーテルなる保護層を設けたと
きには、磁性層の耐蝕性が著しく改善されたものとなる
ことを知り、この発明をなすに至ったものである。As a result of intensive studies from the above viewpoint, the inventors found that when a protective layer made of a specific perfluoropolyether is provided on a magnetic layer whose recording element is a metal magnetic material such as a metal magnetic thin film, the corrosion resistance of the magnetic layer is improved. This invention was made based on the knowledge that this would result in a significant improvement.
すなわち、この発明は、ベース上に金属磁性材を記録素
子とする磁性層を形成し、この磁性層上につぎの一般式
；
％式％
（式中、ｎおよびｍは整数）
で表わされるパーフルオロポリエーテルがラナヘ保護層
を設けたことを特徴とする磁気記録媒体（こ係るもので
ある。That is, in the present invention, a magnetic layer having a magnetic metal material as a recording element is formed on a base, and a magnetic layer is formed on this magnetic layer by the following general formula: % formula % (where n and m are integers). A magnetic recording medium characterized in that a fluoropolyether is provided with a protective layer.
コノ発明ニオいて使用するパーフルオ口ポリエ−チルは
、前記一般式で表わされるものであるが、一般式中のｎ
としては２０〜３００程度、ｍとしては５０〜５００程
度のものが好ましく用いられる。市販品の代表例として
は、ＭｏｎＬｃｆｌｕｏｓ（イタリア国）社製の商品名
ＦＯＭＢＩ、ＩＮ−Ｚ （分子量か約１５，０００．ｍ
＞ｎ ）が挙げられる。The perfluorinated polyethyl used in this invention is represented by the above general formula, and n in the general formula is
Preferably, m is about 20 to 300, and m is about 50 to 500. Representative examples of commercially available products include product names FOMBI and IN-Z (molecular weight approximately 15,000.m) manufactured by MonLCfluos (Italy).
>n).
このようなパーフルオロポリエーテルが潤滑性の良好な
被膜を形成することについてはすてに報告されている。It has been reported that such perfluoropolyethers form films with good lubricity.
しかし、このポリエーテルが金属磁性材を記録素子とす
る磁性層の耐蝕性を向上させるに極めて適したものであ
るとの研究報告例は全くみられず、この発明者らの多岐
に亘る実験検討によって初めて見い出されたものである
。However, there have been no research reports showing that this polyether is extremely suitable for improving the corrosion resistance of magnetic layers that use metal magnetic materials as recording elements, and the inventors' extensive experimental studies It was first discovered by.
上記ポリエーテルからなる保護層を形成するには、ベー
ス上にＦｅ 、 Ｇｏ 、 Ｆｅ−Ｃｏ合金、Ｇｏ −
Ｎ ｉ合金、Ｃｏ−Ｃｒ合金、りん含有Ｇｏなどの強磁
性金属を真空蒸着、イオンプ１ノーティング、ス／Ｎ６
ツタリング、メッキなどによって金属磁性薄膜を形成し
たのち、あるいはベース上にＦｅ、Ｇｏなどの金属磁性
粉を含む磁性塗料を塗着させて磁性層を形成したのち、
これら磁性層（厚さが通常０．０５〜０．５μｍ）上に
前記パーフルオロポリエーテルの有機溶剤溶液を適宜の
手段で塗布するか、あるいは上記溶液中に前記磁性層を
ベースと一体に沙濱処理すれはよい。To form the protective layer made of the above polyether, Fe, Go, Fe-Co alloy, Go-
Vacuum deposition of ferromagnetic metals such as Ni alloy, Co-Cr alloy, and phosphorus-containing Go, IonP1 noting, and S/N6
After forming a metal magnetic thin film by vine ringing, plating, etc., or by coating a magnetic paint containing metal magnetic powder such as Fe or Go on the base to form a magnetic layer,
An organic solvent solution of the perfluoropolyether is applied onto these magnetic layers (usually having a thickness of 0.05 to 0.5 μm) by an appropriate means, or the magnetic layer and the base are soaked together in the solution. The shore treatment is good.
この方法で形成される保護層の厚みとしては、一般に２
０〜２０００Ａ、好適には５０〜１００．ＯＡである。The thickness of the protective layer formed by this method is generally 2
0-2000A, preferably 50-100. It is OA.
かかる薄肉とすることで初期の磁気特性に悪影響を与え
ない一方、−５〜７０″Ｃの広い、飢度軛囲および２０
〜９０％の広い相対湿度範囲ですくれた耐蝕性が得られ
る。Such a thin wall does not adversely affect the initial magnetic properties, while maintaining a wide temperature range of -5 to 70"C and 20"C.
Excellent corrosion resistance is obtained over a wide relative humidity range of ~90%.
この発明の磁気記録媒体としては、ポリエステルフィル
ムなどの合成樹脂フィルム上をベースとする磁気テープ
、円盤めドラムをベースとする磁気ディスクや磁気ドラ
ムなど、磁気ヘッドと摺接する構造の種々の形態を包含
する。The magnetic recording medium of the present invention includes various forms of structures that come into sliding contact with a magnetic head, such as a magnetic tape based on a synthetic resin film such as a polyester film, and a magnetic disk or magnetic drum based on a disc drum. do.
以下に、この発明の実施例を記載してより具体的に説明
する。EXAMPLES Below, examples of the present invention will be described in more detail.
実施例１
巻取式連続蒸着装置により、表面処理（Ａｒプラズマ処
理）された１２μｍ厚のポリエステルベースフィルム上
にコバルト金属を０．２μｍ厚となるように真空蒸着し
た。ついで、ＦＯＭｉ３ＬＩＮ−Ｚ （前出のパーフル
オロポリエーテル） ノｏ、 ｓ 重Ｎ％のｉ−ｔ・２
− トリクロロート２・２−トリフルオロエタン溶液
に浸漬したのち乾燥して、厚み２０７Ａの保護層を有す
るこの発明の磁気テープをつくった。Example 1 Cobalt metal was vacuum-deposited to a thickness of 0.2 μm on a 12 μm-thick polyester base film that had been surface-treated (Ar plasma treatment) using a winding continuous vapor deposition apparatus. Then, FOMi3LIN-Z (the above-mentioned perfluoropolyether) no, s weight N% i-t・2
- A magnetic tape of the invention having a protective layer with a thickness of 207A was prepared by immersion in a trichloroethane 2,2-trifluoroethane solution and then drying.
実施例２
１２μｍ厚のポリエステルベースフィルム上に、Ｆｅ磁
性粉末８０重量部、ＶＡＧＨ（米国ｕｃｃ社製の水酸基
含有塩化ビニル−酢酸ビニル共重合体）１６重量部、タ
ケネートＬ−１００’７（成田薬品工業社製の多官能性
インシアネート化合物）４重量部、メチルイソブチルケ
トン６１重量部、トルエン６１重量部からなる磁性塗料
を塗布乾燥して、６μｍ厚の磁性層を形成した。以下、
実施例１と同様の方法で上記磁性層上に厚み２５ｏＸの
パーフルオロポリエーテル層を有するこの発明の磁気テ
ープをつくった。Example 2 On a 12 μm thick polyester base film, 80 parts by weight of Fe magnetic powder, 16 parts by weight of VAGH (hydroxyl group-containing vinyl chloride-vinyl acetate copolymer manufactured by UCC, USA), Takenate L-100'7 (Narita Pharmaceutical Co., Ltd.), A magnetic paint consisting of 4 parts by weight of polyfunctional incyanate compound (manufactured by Kogyo Co., Ltd.), 61 parts by weight of methyl isobutyl ketone, and 61 parts by weight of toluene was applied and dried to form a 6 μm thick magnetic layer. below,
A magnetic tape of the present invention having a perfluoropolyether layer having a thickness of 250X on the above magnetic layer was prepared in the same manner as in Example 1.
比較例１
パーフルオロポリエーテルの代りに、厚み２３０Ａのシ
リコーンオイル保護層を設けるようにした以外は、実施
例１と同様にして磁気テープをつくった。Comparative Example 1 A magnetic tape was produced in the same manner as in Example 1, except that a 230A thick silicone oil protective layer was provided instead of perfluoropolyether.
比較例２
パーフルオロポリエーテルの代りに、厚み２８０Ａのシ
リコーンオイル保護層を設けるようにした以外は、実施
例２と同様にして磁気テープをつくった。Comparative Example 2 A magnetic tape was produced in the same manner as in Example 2, except that a 280A thick silicone oil protective layer was provided instead of perfluoropolyether.
上記実施例１，２および比較例１，２の各磁気テープに
つき耐蝕性試験を行った結果は、後記の表に示されると
おりであった。なお、耐蝕性試験は以下の方法で行った
。A corrosion resistance test was conducted on each of the magnetic tapes of Examples 1 and 2 and Comparative Examples 1 and 2, and the results were as shown in the table below. In addition, the corrosion resistance test was conducted by the following method.
く耐蝕性試験〉
得られた磁気テープを相対湿度９０％、温度６０”およ
び８０゛Ｃの条件ドに放置し、所定の期間毎に最大磁化
（Ｍｒｒｌ）の測定を行い、放置前の磁気テープの最大
磁化を１００％とし、これと比較した値で表わした。Corrosion resistance test> The obtained magnetic tape was left under the conditions of relative humidity 90%, temperature 60'' and 80°C, and the maximum magnetization (Mrrl) was measured at predetermined intervals. The maximum magnetization of is taken as 100%, and the value is expressed in comparison with this.
上表から明らかなように、この発明の磁気テープは、従
来のものに比し耐蝕性によりすぐれているものであるこ
とがわかる。As is clear from the above table, the magnetic tape of the present invention has superior corrosion resistance compared to the conventional magnetic tape.
特許出願人 日立マクセル株式会社 ２４３−Patent applicant: Hitachi Maxell, Ltd. 243-
Claims (1)
形成し、この磁性層上につぎの一般式。 ＣＦ３０÷Ｃ２Ｆ４Ｏガ巨ＣＦ２Ｏ端ＣＦ３（式中、ｎ
およびｍは整数） で表わされるパーフルオロポリエーテルからなる保護層
を設けたことを特徴とする磁気記録媒体。(1) A magnetic layer having a metal magnetic material as a recording element is formed on the base, and the following general formula is formed on this magnetic layer. CF30÷C2F4O giant CF2O end CF3 (in the formula, n
and m is an integer) A magnetic recording medium comprising a protective layer made of perfluoropolyether represented by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041019A JPS59167849A (en) | 1983-03-11 | 1983-03-11 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041019A JPS59167849A (en) | 1983-03-11 | 1983-03-11 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59167849A true JPS59167849A (en) | 1984-09-21 |
Family
ID=12596677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58041019A Pending JPS59167849A (en) | 1983-03-11 | 1983-03-11 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59167849A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0186356A2 (en) * | 1984-12-21 | 1986-07-02 | Minnesota Mining And Manufacturing Company | Metallic thin-film magnetic recording medium having a hard protective layer |
| WO2016190221A1 (en) * | 2015-05-28 | 2016-12-01 | 旭硝子株式会社 | Coating composition and process for producing layered photoresist object |
-
1983
- 1983-03-11 JP JP58041019A patent/JPS59167849A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0186356A2 (en) * | 1984-12-21 | 1986-07-02 | Minnesota Mining And Manufacturing Company | Metallic thin-film magnetic recording medium having a hard protective layer |
| WO2016190221A1 (en) * | 2015-05-28 | 2016-12-01 | 旭硝子株式会社 | Coating composition and process for producing layered photoresist object |
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