JPS598125A - Magnetic tape - Google Patents

Magnetic tape

Info

Publication number
JPS598125A
JPS598125A JP57118962A JP11896282A JPS598125A JP S598125 A JPS598125 A JP S598125A JP 57118962 A JP57118962 A JP 57118962A JP 11896282 A JP11896282 A JP 11896282A JP S598125 A JPS598125 A JP S598125A
Authority
JP
Japan
Prior art keywords
magnetic tape
fluorine
thin film
magnetic
activator
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
Application number
JP57118962A
Other languages
Japanese (ja)
Inventor
Sanemori Soga
曽我　真守
Nobuo Sonoda
園田　信雄
Tokihiko Shimizu
清水　時彦
Masashi Moriwaki
正志 森脇
Wataru Shimoma
下間　亘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP57118962A priority Critical patent/JPS598125A/en
Publication of JPS598125A publication Critical patent/JPS598125A/en
Pending legal-status Critical Current

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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/735—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer
    • 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

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obtain a hihg quality magnetic tape having superior traveling performance by forming a thin metallic film surface-coated with an activator contg. fluorine on the rear side of the support of a magnetic tape. CONSTITUTION:A ferromagnetic thin film is formed on one side of a support by vapor deposition. A thin film of a nonmagnetic metal is uniformly formed on the other side, and a thin film of an activator contg. fluorine is formed on the nonmagnetic film. Perfluoroalkylsulfonate having several-several 10Angstrom length of the molecular chain, perfluoroalkylcarboxylic acid, perfluoroalkyltrimethylammonium salt or the like is used as the activator contg. fluorine. A combination of 5-8C alkali metallic perfluoroalkylsulfonate with >=10 alkali metallic perfluoroalkylsulfonate is especially effective in improving the traveling performance of the resulting magnetic tape.

Description

【発明の詳細な説明】 本発明は磁気テープの走行性、導電性の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the running properties and conductivity of magnetic tapes.

従来、磁気テープの走行性を良くし、また帯電防止のた
めに、磁気テープの背面にコーティング層が塗工されて
いることが多い。このコーティング層は、例えばバイロ
ンに、微粒化したタッチエンブラックを分散させた樹脂
からなっている。このようにして作られた磁気テープを
用いて、信号の記録再生を行なうと、ドロップアウトと
いう現象がよく見られる。ドロップアウトとは、磁気記
〆−１ 録装置を用いて、磁気テープに信号を記録させた後再生
を行った時に、磁気テープに記録の抜けた部分があシ、
正確な信号の再生ができない現象をいう。このドロップ
アウトは磁気テープにとって、致命的な欠陥となる。ド
ロップアウトが生じる原因は、磁気テープの背面にコー
ティングされている樹脂中のケッチェンブラックによる
ものである。Conventionally, a coating layer is often applied to the back surface of a magnetic tape in order to improve the running properties of the magnetic tape and to prevent static electricity. This coating layer is made of, for example, a resin in which micronized Touchen Black is dispersed in Vylon. When recording and reproducing signals using a magnetic tape made in this manner, a phenomenon called dropout is often observed. Dropout is when a signal is recorded on a magnetic tape using a magnetic recording device and then played back, leaving unrecorded areas on the magnetic tape.
A phenomenon in which accurate signal reproduction is not possible. This dropout is a fatal defect for magnetic tape. The cause of dropouts is Ketjenblack in the resin coated on the back side of the magnetic tape.

ケッチェンブラックは通常０．１〜０５μｍ程度の微粒
子で、バイロン中に均一に分散されている。Ketjen black is usually a fine particle of about 0.1 to 0.5 μm and is uniformly dispersed in Vylon.

しかし、コーティング層の中で、ケッチェンブラックの
特性として２次粒子化が起こり、数μｍ程ＩＷの大きさ
のケッチェンブラック粒子になることがある。コーティ
ング層の厚さは通常２７ｔｍ程度なので、２次粒子化し
たケッチェンブラックは、大きな突起物となる。このよ
うな突起物があると、磁気アープを、磁気記録装置で走
行させた場合、磁気テープの表面に凹凸が生じる。この
凹凸のために、磁気ヘッドと磁気テープの磁性面との接
触が悪くなる。このため記録信号が忠実に記録されなく
なり、一部分、記録の抜けが生じる。これがドロップア
ウトの原因である。However, as a characteristic of Ketjen black, secondary particles may occur in the coating layer, resulting in Ketjen black particles having an IW size of several μm. Since the thickness of the coating layer is usually about 27 tm, the secondary particles of Ketjen Black become large protrusions. If such protrusions exist, when the magnetic arc is run in a magnetic recording device, unevenness will occur on the surface of the magnetic tape. These irregularities cause poor contact between the magnetic head and the magnetic surface of the magnetic tape. For this reason, the recording signal is not recorded faithfully, and some recording omissions occur. This is the cause of dropouts.

本発明は、上記のドロップアウトをなくし、かつ、磁気
テープの走行性、帯電防止性を従来の磁気テープ以上の
特性にすることを１的としている。One object of the present invention is to eliminate the above-mentioned dropout and to improve the running properties and antistatic properties of a magnetic tape to better characteristics than those of conventional magnetic tapes.

次に本発明の磁気アープの構成について述べる。　・本
発明の磁気テープは、−例として、１０／１ｍ程度の厚
さの高分子フィルムの片面に、数千人程度の磁性材の膜
を、もう一方の面に、非磁性金属の薄膜を均一に形成さ
せ、かつ、その」二にフッ素系活性剤の薄膜を形成させ
たフィルムからなっている。非磁性金属膜の厚さは、数
百人〜数千への厚さが望ましい。寸た膜厚のバラツキは
、できるかぎり小さい方が良い。望むらくは±１０％に
抑えだものが良い。フッ素系活性剤の層は、数十へ〜数
百への厚さが望ましい。Next, the configuration of the magnetic arp of the present invention will be described.・The magnetic tape of the present invention includes, for example, a film of several thousand magnetic materials on one side of a polymer film with a thickness of about 10/1 m, and a thin film of non-magnetic metal on the other side. It consists of a film that is uniformly formed and on which a thin film of a fluorine-based activator is formed. The thickness of the non-magnetic metal film is preferably several hundred to several thousand. It is better to keep the variation in film thickness as small as possible. Ideally, it is best to keep it within ±10%. The layer of fluoroactive agent is desirably several tens to several hundreds thick.

本発明に用いる非磁性金属としては、Ｚｎ、ＡＩなどが
例としてあげられる。これらの金属は、比抵抗が〜１０
　Ω鑵で、電気伝導性が高く、従来ツバイロンとケッチ
ェンブラックを組合せたコーティング層より、はるかに
磁気テープの帯電防止がすぐれている。捷だ、これらの
金属ｄ１、蒸着法やスパッタリング法により容易に薄膜
にすることができる。さらに、フッ素系活性剤との吸着
の強さを考えると、Ｚｎ、Ａ６が他の金属よりすぐれて
いる。Examples of nonmagnetic metals used in the present invention include Zn and AI. These metals have a resistivity of ~10
It has high electrical conductivity and is much better at preventing static electricity on magnetic tape than the conventional coating layer that combines Twiyron and Ketjenblack. However, these metals d1 can be easily formed into a thin film by vapor deposition or sputtering. Furthermore, when considering the strength of adsorption with fluorine-based activators, Zn and A6 are superior to other metals.

本発明に用いるフッ素系活性剤としては、分子鎖の長さ
が数人〜数十への、パーフルオロアルキルスルホン酸Ｊ
４．バーフルオロアルキルカルボン酸、バーフルオロア
ルキルトリメチルアンモニウム塩などが例としてあげら
れる。これらのなかで、とくに炭素数５〜８のものと１
ｏ以上のパーフルオロアルキルスルホン酸アルカリ金属
塩を併用して用いたものが磁気テープの走行性に対し、
すぐれた効果をもつ。The fluorine-based activator used in the present invention includes perfluoroalkylsulfonic acid J with a molecular chain length of several to several dozen.
4. Examples include perfluoroalkylcarboxylic acid and perfluoroalkyltrimethylammonium salt. Among these, those with 5 to 8 carbon atoms and 1
The combination of perfluoroalkyl sulfonic acid alkali metal salts of o or more improves the running properties of magnetic tapes.
It has excellent effects.

本発明には、磁性剤として例えはＣｏ系合金が用いられ
る。Ｃｏ系合金は、磁気テープのような薄膜として用い
る場合、他の磁性相より、磁気的性質１耐腐食性がすぐ
れている。Ｃｏ系合金の中でも、ＣｏＮｉ系合金が、と
くにすぐれた効果をもつＯ 以ド、具体的に本発明の詳細な説明する。In the present invention, for example, a Co-based alloy is used as the magnetic agent. When used as a thin film such as a magnetic tape, Co-based alloys have better magnetic properties and corrosion resistance than other magnetic phases. Among the Co-based alloys, the CoNi-based alloy has particularly excellent effects, and the present invention will be specifically described below.

実施例１ ホリエチレンテレフタレート（ＰＥＴ）フィルム（厚み
１２μｍ）の片面に、Ｃｏ　Ｎ　ｉ合金薄膜を蒸着によ
り形成し、背面に、蒸着法により約１０００人の厚みの
Ｚｎ薄膜を形成し、その上に、炭素数が８以下と１０以
上の２種類含むパーフルオロアルキルスルホン酸アルカ
リ金属塩の０．１ｗｌ；％エタノール溶液を塗工してエ
アナイフで余分の液を落として、磁気テープを得た。Example 1 A CoNi alloy thin film was formed by vapor deposition on one side of a polyethylene terephthalate (PET) film (thickness 12 μm), and a Zn thin film with a thickness of about 1000 mm was formed on the back side by vapor deposition. A magnetic tape was obtained by coating a 0.1 wt.

得られた磁気テープの走行性を評価したところ、Ｚｎ面
の摩擦係数は０．３６と非常に小さく、寸／こ帯電によ
る磁気テープのまつわりつき等もない、すぐれた走行性
を示した。さらに、テープをリールに巻き取った状態で
のビデオ信号による記録テストにおいても、ノイズ、ド
ロップアウトのほとんどない高品質の記録が得られた。When the running properties of the obtained magnetic tape were evaluated, the friction coefficient of the Zn surface was very small at 0.36, and the magnetic tape showed excellent running properties with no clinging due to dimensional/electrostatic charging. Furthermore, in a video signal recording test with the tape wound onto a reel, high-quality recording with almost no noise or dropouts was obtained.

実施例２ 実施例１のＺｎの代わりに、Ａｌを用いて、磁気テープ
を得だ。この磁気テープのＡ［面の摩擦係数は０．３１
小さく、帯電もなく、非常にすぐれた走行性能を示しだ
。まだ、記録テストにおいても、グイズ、ドロップアウ
トのほとんどない高品質の記録が得られた。Example 2 A magnetic tape was obtained by using Al instead of Zn in Example 1. The friction coefficient of the A surface of this magnetic tape is 0.31
It is small, has no static charge, and exhibits excellent running performance. Even in recording tests, high-quality records were obtained with almost no dropouts or dropouts.

以上の実施例で示した支持体、磁性材、フッ素系活性剤
の材質等はどく一例であり、本発明の範囲がこれらに限
定されるものでは決してない。The materials of the support, magnetic material, fluorine-based activator, etc. shown in the above examples are merely examples, and the scope of the present invention is not limited thereto.

例えば、支持体としてＰＥＴを用いたが、通常のフィル
ムを形成可能な材質であれば、殆んどすべての樹脂が使
用できる。For example, although PET was used as the support, almost any resin can be used as long as it is a material that can form a normal film.

以上、説明したとおり、本発明においては、磁気テープ
の支持体の背面に、表面にフッ素系活性剤を有する金属
薄膜を設けることにより、走行性がすぐれ、ノイズ、ド
ロップアウト等の々い、極め−Ｃ高品質の記録が可能な
磁気テープが得られる。As explained above, in the present invention, by providing a metal thin film having a fluorine-based activator on the surface on the back side of the magnetic tape support, running properties are excellent and noise, dropouts, etc. -C A magnetic tape capable of high quality recording is obtained.

代理人の氏名　弁理士　中　尾　敏　男　ほか１名１４
５−Name of agent: Patent attorney Toshio Nakao and 1 other person14
5-

Claims (1)

【特許請求の範囲】 （１）磁性材を支持した支持体の背面に非磁性金属薄膜
を備え、かつ上記金属薄膜の表面にフッ素系活性剤を有
することを特徴とする磁気テープ。 （２）非磁性金属薄膜がＺｎ　もしくばＡｌの何れかか
らなることを特徴とする特許請求の範囲第１項記載の磁
気テープ。 （３）　　フッ素系活性剤が、分子鎖の長さが長いのと
短いのとの２種類の分子からなるととを特徴とする特許
請求の範囲第１項記載の磁気テープ。 （４）　　フッ素系活性剤がパーフルオロ化合物である
ことを特徴とする特許請求の範囲第１項記載の磁気テー
プ。 （６）パーフルオロ化合物がパーフルオロアルキルスル
ホン酸塩、バーフルオロアルキルカルボン酸塩、パーフ
ルオロアルキルトリメチルアンモニウム塩からなる群か
ら選択された一種であることを特徴とする特許請求の範
囲第４項記載の磁気チー特許請求の範囲第１項記載の磁
気テープ。 （７）　　Ｃｏ系合金がＣｏＮｉ合金であることを特徴
とする特許請求の範囲第６項記載の磁気テープ。Claims: (1) A magnetic tape comprising a non-magnetic metal thin film on the back side of a support supporting a magnetic material, and a fluorine-based activator on the surface of the metal thin film. (2) The magnetic tape according to claim 1, wherein the nonmagnetic metal thin film is made of either Zn or Al. (3) The magnetic tape according to claim 1, wherein the fluorine-based activator is comprised of two types of molecules, one with a long molecular chain and one with a short molecular chain. (4) The magnetic tape according to claim 1, wherein the fluorine-based activator is a perfluoro compound. (6) Claim 4, characterized in that the perfluoro compound is one selected from the group consisting of perfluoroalkyl sulfonates, perfluoroalkyl carboxylates, and perfluoroalkyltrimethylammonium salts. A magnetic tape according to claim 1. (7) The magnetic tape according to claim 6, wherein the Co-based alloy is a CoNi alloy.
JP57118962A 1982-07-07 1982-07-07 Magnetic tape Pending JPS598125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57118962A JPS598125A (en) 1982-07-07 1982-07-07 Magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57118962A JPS598125A (en) 1982-07-07 1982-07-07 Magnetic tape

Publications (1)

Publication Number Publication Date
JPS598125A true JPS598125A (en) 1984-01-17

Family

ID=14749581

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57118962A Pending JPS598125A (en) 1982-07-07 1982-07-07 Magnetic tape

Country Status (1)

Country Link
JP (1) JPS598125A (en)

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