JPS6228918A - Magnetic recording tape - Google Patents
Magnetic recording tapeInfo
- Publication number
- JPS6228918A JPS6228918A JP16665385A JP16665385A JPS6228918A JP S6228918 A JPS6228918 A JP S6228918A JP 16665385 A JP16665385 A JP 16665385A JP 16665385 A JP16665385 A JP 16665385A JP S6228918 A JPS6228918 A JP S6228918A
- Authority
- JP
- Japan
- Prior art keywords
- film
- tape
- magnetic recording
- recording tape
- 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.)
- Granted
Links
Landscapes
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (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、磁気記録テープ、殊にVTR用の磁気記録テ
ープに関するものであり、長時間の記録を可能ならしめ
た改良された磁気記碌テープに係る。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a magnetic recording tape, particularly a magnetic recording tape for VTR, and relates to an improved magnetic recording tape that enables long-time recording. Related to tape.
磁気記録用テープとL″′Cけ、従来から二軸配向d4
リエチレンテレフタレートフィルムの表面の少なくとも
片側に、主としてr−酸化鉄と高分子バインターよりな
る磁気層を形成した磁気1碌用テープが用いられている
。しかしこれら従来の磁気1碌用テープとしては次の・
ような欠点を有していた。すなわち(1) 磁気記録
用テープとしての保磁力が小さい。Magnetic recording tape and L'''C, conventionally biaxially oriented d4
A magnetic tape is used in which a magnetic layer consisting mainly of r-iron oxide and polymer binder is formed on at least one side of the surface of a polyethylene terephthalate film. However, these conventional magnetic tapes are as follows:
It had such drawbacks. That is, (1) the coercive force as a magnetic recording tape is small.
(2) 磁気記録用テープとしたときテープ厚みを薄
くすると磁気記録用テープの走行性や耐久性が不縁と々
つたり記録の脱落(ドロップアウト)がおこるので一定
の大きさのカセットに巻けるテープ1に限界があり記録
の長時間化が出来ない。(2) When used as a magnetic recording tape, if the tape thickness is reduced, the running performance and durability of the magnetic recording tape will be affected, and recordings will drop out (dropout), so it can be wound into a cassette of a certain size. Due to the limitations of tape 1, it is not possible to record for a long time.
このため特に近年家庭用VTRの小型化に伴い、T−ブ
幅が12.7關から8 mmと小さくなりカセットも小
型化してきたが、これに対応して薄いテープとして記録
容&t’に増大せしめる技術が伴わす、磁気記録用テー
プとして満足出来るものがなかった。For this reason, especially in recent years, with the miniaturization of home VTRs, the T-beam width has decreased from 12.7 mm to 8 mm, and cassettes have also become smaller. There was no satisfactory magnetic recording tape available due to the technology involved.
〔発明の目的J
本発明の目的をゴ上記欠点を解消せしめ、磁気記録テー
プとしたときの保磁力が大きく、記録の脱落がなく、し
かも薄くしても磁気記録用テープとしての走行性や耐久
性が極めて良好な磁気記録用テープを提供しようとする
ものである。[Objective of the Invention J The object of the present invention is to solve the above-mentioned drawbacks, and to provide a magnetic recording tape with a high coercive force, no recording dropout, and even when made thin, it has good runnability and durability as a magnetic recording tape. The present invention aims to provide a magnetic recording tape with extremely good properties.
本発明は、特定の機構的性質及び表面構造を備えた二軸
配向ポリエチレン−2,6−ナフタレンジカルボキシレ
ートのフィルムを支持体とし、この支持体の表面の一方
に金属薄膜からなる磁性層を形成せしめ、また前記支持
体の磁性金属薄膜が形成さnていない反対側の他方の表
面に滑剤を含む有機高分子の塗膜を塗設し7てなる磁気
記録テープである。The present invention uses a biaxially oriented polyethylene-2,6-naphthalene dicarboxylate film with specific mechanical properties and surface structure as a support, and a magnetic layer made of a metal thin film on one of the surfaces of this support. This magnetic recording tape is made by coating a coating film of an organic polymer containing a lubricant on the opposite surface of the support on which the magnetic metal thin film is not formed.
本発明の磁気記録テープの支持体となるフィルムは長さ
方向5%伸長時応力(jソ下F −5仙と称する)が1
8 kg / ul 39.17あること、長手方向の
ヤング率が800k[/mu上であり、かつ幅方向のヤ
ング率が500 kg/m以上であることと後述する測
定方θユに基づく表面粗さが(1,005rim以下で
あることf特徴とする二軸内P向ポリエチレンー2,6
−ナフタレンジカルポキ7レートである。こtLk要す
ると、本発明の磁気記録テープの支持体は、高ヤング率
で応力による寸法変化が小さく、かつ表面は棲めて滑ら
かである。そして、耐熱性の優nたポリエチレン−2,
6−ナフタレンジカルホギン1/−トを支持体フィルム
と1、てこの表面十に出性金舅薄膜を形成し2、高密度
、高感度のBrI録再生を可能ならしめると共に、支持
体の別の表面に滑剤を含む塗膜を塗設置〜て、使用中の
歪や走行性に伶〈問題のない磁気記録テープな一得たも
のである1、このような構成に加えてテープ全体として
の厚さも10μm以下に薄くなし得たことから、カセッ
ト単位に収納できるテープ長は増加でき、記録時間を大
幅に延長できる等の効果と、高いヤング率に伴うu1録
録再時の記録の歪、ヌキュー等も飛酢的に改良されたも
のとなっている。The film that serves as the support for the magnetic recording tape of the present invention has a stress (referred to as F -5 x under J) of 1 when elongated by 5% in the longitudinal direction.
8 kg/ul 39.17, the Young's modulus in the longitudinal direction is 800 k[/mu or more, the Young's modulus in the width direction is 500 kg/m or more, and the surface roughness is based on the measurement method θyu described later. Biaxial internal P-oriented polyethylene-2,6 characterized by having a diameter of 1,005 rim or less
- naphthalenedicarpoxylate. In short, the support for the magnetic recording tape of the present invention has a high Young's modulus, little dimensional change due to stress, and a smooth surface. And polyethylene-2, which has excellent heat resistance,
6-naphthalene dicarhogine 1/- is combined with the support film to form a thin metal film on the surface of the lever. A coating film containing a lubricant is coated on another surface to prevent distortion and runnability during use.This is a magnetic recording tape that has no problems.1 In addition to this structure, the tape as a whole Since the thickness of the tape can be reduced to less than 10 μm, the length of the tape that can be stored in a cassette unit can be increased, the recording time can be significantly extended, and the distortion of recording during recording and playback due to the high Young's modulus can be reduced. , Nukyu, etc. have also been improved like Tobisu.
本発明を更に説明すると、
本発明に於ける支持体フィルムの長さ方向のヤング率と
してVi800〜1600kg/励lが好11、い。ヤ
ング率が16ookg/mt超えると、テープの引裂け
がおころので好ましくない。To further explain the present invention, the Young's modulus of the support film in the longitudinal direction in the present invention is preferably 800 to 1600 kg/excitation l. If the Young's modulus exceeds 16ookg/mt, the tape may tear, which is not preferable.
また幅方向のヤング率としては500kg/a’〜70
0 kg / l1mが好′ましい。幅方向のヤング率
が500kg/sr未満の場合、テープの走行な一繰返
すとテープの幅方向にしわや傷が入りやずくなる。なお
、この値が700kg/mを超オると、長さ方向のヤン
グ率が1000 kg/m1以上を161時に満足する
二軸配向ポリエチレン2.6ナフタレートフイルムを簡
易乃至通常の延伸手段によって得ることがもはや困難と
なおことから得策でない。Also, the Young's modulus in the width direction is 500 kg/a'~70
0 kg/l1m is preferred. When the Young's modulus in the width direction is less than 500 kg/sr, the tape tends to be wrinkled or scratched in the width direction when the tape is repeatedly run. If this value exceeds 700 kg/m, a biaxially oriented polyethylene 2.6 naphthalate film that satisfies a longitudinal Young's modulus of 1000 kg/m or more at 161 hours can be obtained by simple or ordinary stretching means. It is no longer a good idea to do so because it is difficult to do so.
本発明に於ける表面粗さが0.005μm以下でめる支
持体フィルムとしては元素周期衣第■A、第11F!、
第1VA、第■B族の元素を含有する無機粒子全0.1
型針%以下含有せしめて、表面を形成+!:し、めても
よく、7他の表面処理により形成せしめても工い。二軸
配向の方法と(7てけ一般的なロールやステンターを用
いて縦樋同時に延伸してもよく、ヌ縦横各々逐時に延伸
[7てもよい。In the present invention, as a support film having a surface roughness of 0.005 μm or less, element periodic coatings No. ■A and No. 11F! ,
Total 0.1 of inorganic particles containing elements of group 1VA and group ①B
Form the surface by containing less than % of mold needles! 7. It can also be formed by other surface treatments. With the biaxial orientation method (7), the film may be stretched simultaneously in the vertical direction using a general roll or stenter, or it may be stretched sequentially in the vertical and horizontal directions [7].
本発明のテープを構成する磁性金属としてはコバルト、
鉄、ニッケルもしくはこれらの合金、又はこれらとクロ
ム、タングステンとの合金を用いる。The magnetic metals constituting the tape of the present invention include cobalt,
Iron, nickel, an alloy thereof, or an alloy of these with chromium or tungsten is used.
金属薄膜の形成方法としては無電解メッキや電解メッキ
による湿す夏空蒸着、スパッタリングやイオンブレーテ
ィングによる乾式法を用いる。特に真空源N法に析出速
度が極めて大きく、高い保磁力を得ることが出来るので
最も好ましい形成方法である。薄5・νは300=15
00 im(0,3−’、5 um)程度が一応の厚さ
の標準となる。The metal thin film is formed by wet summer air deposition using electroless plating or electrolytic plating, or by dry method using sputtering or ion blasting. In particular, the vacuum source N method is the most preferred forming method because it has an extremely high deposition rate and can obtain a high coercive force. Thin 5・ν is 300=15
The standard thickness is about 0.00 im (0.3-', 5 um).
次に、支持体の磁性薄膜を形成してない側の表面、・イ
ニはテープとしての走行性全維持するために滑剤を含む
肩殻高分子の塗膜を塗設する。滑剤としてはアクリル酸
アルミニウム。Next, the surface of the support on which the magnetic thin film is not formed is coated with a coating of shoulder shell polymer containing a lubricant in order to maintain full running properties as a tape. Aluminum acrylate is used as a lubricant.
モ11ブデン、′#細シリカ、弗素樹脂等が例示できる
。滑剤を支持体フィルムと接着力のある有機高分子(例
えばポリオキシアルキレンクリフーノトのグリシシール
エーテル等を含むポリエーテルや、ナフタレン−2,6
−ジカルボン酸を脂肪族ジカルボン酸等で変性した酸成
分をもつ共重合ポリエステル等)の溶液又はエマルジョ
ンに分散して、これを支持体表面に塗布することによシ
滑り易い、走行性の改良された磁気記録テープが得られ
る。滑剤層は1μm以下、50〜500 nm程度の薄
いものでよい。Examples include molybdenum, #fine silica, and fluororesin. The lubricant is an organic polymer with adhesive strength to the support film (for example, polyether containing glycysyl ether of polyoxyalkylene chloride, naphthalene-2,6
- By dispersing a dicarboxylic acid in a solution or emulsion of a copolymerized polyester having an acid component modified with an aliphatic dicarboxylic acid, etc., and applying this to the surface of the support, slippage and running properties can be improved. A magnetic recording tape is obtained. The lubricant layer may be as thin as 1 μm or less, or about 50 to 500 nm.
本発明忙於けるテープ厚みとしては3〜10μmが好ま
しい。3μm未満ではテープの走行性や耐久性が不良で
あり、一方10 am以上では長時間記録としての目的
を達成できない。The thickness of the tape used in the present invention is preferably 3 to 10 μm. If the thickness is less than 3 μm, the running properties and durability of the tape will be poor, while if the thickness is 10 am or more, the purpose of long-term recording cannot be achieved.
本発明は表面粗さが0.005 rim以下であるニー
1〜
軸配向ポリエチレン2.6ナフタレフイルムの表面の片
側に磁性金属薄膜を形成し、反対側に滑剤を分散せしめ
た有機高分子より々ゐ塗□膜を形成してなるので磁気記
録用テープとして保磁力が大きく、又長さ方向の5%伸
長時応力が18kg/m以上、ヤング率が80okg/
が以上で幅方向のヤング率が500kg/m以上である
二軸配向ポリ主チレン2,6ナフタンジカルポキシレー
トフイルムよりにるので磁気記録用テープとして厚みが
10 am以下でも、テープの走行性や耐久性が良好で
家庭用VTRのベータ方式やBIIlffi方式のカセ
ットに於ても、磁気記録用テープの厚みを薄くすること
が出来、長時間記録が可能となる。The present invention is based on an organic polymer in which a magnetic metal thin film is formed on one side of the surface of a naphthalene film having a surface roughness of 0.005 rim or less, and a lubricant is dispersed on the other side. Since it is formed with a thin coating film, it has a large coercive force as a magnetic recording tape, and the stress at 5% elongation in the length direction is 18 kg/m or more, and the Young's modulus is 80 kg/m.
Since it is made from a biaxially oriented polyethylene 2,6 naphthanedicarpoxylate film with a Young's modulus in the width direction of 500 kg/m or more, even if the thickness is 10 am or less as a magnetic recording tape, the tape running properties and The durability is good, and even in Beta type and BIIlffi type cassettes of home VTRs, the thickness of the magnetic recording tape can be made thinner, making it possible to record for a long time.
次に実施例に基づいて本発明の実施態様を説明する。 Next, embodiments of the present invention will be described based on Examples.
々お、本発明における種々の物性値および特性は以下の
如くして測定されたものであり、かつ定義される。Various physical property values and characteristics in the present invention were measured and defined as follows.
+11 ヤング率測定
フィルムを試料中10mm、長さ15anに切り、チャ
ック間100 inmにして引張速度10關/分、チャ
ート速度500IIIIII/分にインストロンタイプ
の万能引張試験装置にて引張った。得られた荷重−伸び
曲線の立上り部の接線よりヤング率を計算した。+11 Young's modulus measurement film was cut into 10 mm and 15 ann length samples, and stretched using an Instron type universal tensile tester at a tension speed of 10 mm/min and a chart speed of 500 III/min with a chuck gap of 100 inches. Young's modulus was calculated from the tangent to the rising portion of the obtained load-elongation curve.
+21F−5値の測定
上記ヤング率測定時、引張速度200ma/分、チャー
ト速度’1 ’00 am/分とした時の5%引張時の
応力より求めた。Measurement of +21F-5 value When measuring the Young's modulus described above, it was determined from the stress at 5% tension when the tensile speed was 200 ma/min and the chart speed was '1'00 am/min.
(3) フィルム表面粗さくR’a)JIS B 0
601に準じて測定し庭。東京精密社■製の触針式表面
粗さ針(SURFCOM 3B)を用いて、針の半径2
7/廟、荷重o、b 7 gの条件下にチャート(フィ
ルム表面粗さ曲線)をかかせた。フィルム表面粗さ曲線
からその中心線の方向に測定長さLの部分を抜き取り、
この抜き取り部分の中心線をX軸とし、縦倍基の方向Y
軸として、粗さ曲線をY = f (x)で表わしたと
き、次の式で与えられる値(i(a : Bm )をフ
ィルム表面粗さとして定義する。(3) Film surface roughness R'a) JIS B 0
Measure the garden according to 601. Using a stylus-type surface roughness needle (SURFCOM 3B) manufactured by Tokyo Seimitsu Co., Ltd., the radius of the needle is 2.
A chart (film surface roughness curve) was drawn under conditions of 7/myo, load o, and b 7 g. Extract a portion of measurement length L from the film surface roughness curve in the direction of its center line,
The center line of this cut-out part is the X axis, and the direction of the vertical multiplication base is Y.
When the roughness curve is expressed as Y=f(x) as the axis, the value (i(a:Bm)) given by the following equation is defined as the film surface roughness.
本発明では、基準長を0.25mmとし″′C8個測定
し、値の大きい方から3個除いた5個の平均値としてR
aを表わした。In the present invention, the reference length is set to 0.25 mm, 8 pieces of "'C are measured, and the average value of 5 pieces excluding 3 pieces from the largest value is R.
represents a.
−10=
(4) 保磁力
磁気記録 等の磁気特性を試料振動型磁力計で測定し、
そのヒステリシス曲線から保磁力を求めた。-10= (4) Measure magnetic properties such as coercive force magnetic recording with a sample vibrating magnetometer,
The coercive force was determined from the hysteresis curve.
保磁力が5000e(エルステツド)以上の場合は保磁
カニ良好、5000e未満の場合を保磁力:不良と判定
した。When the coercive force was 5000e (Oersted) or more, the coercive force was determined to be good, and when it was less than 5000e, the coercive force was determined to be poor.
(5) ドロップアウト
磁気テープを家庭用ビデオテーブレフータ(ヘリカルス
キャン)で連続100時間走行させる。そのテープを4
0゛Cで48時間保持したのち、常温にもどしたテープ
を記録・再生させ、ドロップ中アウトカウンターを用い
て信号出力50%以下のものを数えた。(5) Dropout magnetic tape is run continuously for 100 hours on a home-use video table refuter (helical scan). That tape 4
After being kept at 0°C for 48 hours, the tape was returned to room temperature and recorded and played back, and a dropout counter was used to count the number of tapes with a signal output of 50% or less.
なお、測定は1/2インチ幅、780mを1巻として1
0巻の測定を行ない、1巻あたりの個数が2個未満の場
合をドロップ・アウト:良好、2個以上の場合全ドロン
/・アウト:不良と判定した。In addition, the measurement is 1/2 inch width and 780 m as one roll.
Measurement was performed for 0 rolls, and when the number of pieces per roll was less than 2, it was judged as drop-out: good, and when there were 2 or more pieces, it was judged as all-out/out: bad.
(6) 磁気記録用テープの走行性
家庭用ビデオテールコータ(へI)カルスキャン)にセ
ットし、走行開始、停止を繰り返17ながら100時間
走行させ走行状態を調べるとともに出力測定を行なった
。(6) Running properties of magnetic recording tape The tape was set in a home-use video tail coater (Calscan) and run for 100 hours, repeatedly starting and stopping 17 times, to examine the running condition and measure the output.
この走行において下記m目を全て満足する場合を走行性
:良好、そうでない場合を走行性:不良と判定した。In this run, if all of the m-th items below were satisfied, the running performance was determined to be good, and if not, the running performance was determined to be poor.
■ テープの紘が折れたりワカメ状にならない。■ The tape will not bend or become seaweed-like.
Q) 走行中にテープ鳴きが生じない。Q) There is no tape squeal while driving.
■) テープが袈けたり、破断したりしない。■) The tape will not run out or break.
(7) カール
磁気記録用テープ原反から500X500mmの正方形
の試料を切り出し、そのカールの状態を下記5段階に分
類し、DとEViカール:良好、A、B、Cはカール:
不良と判定した。(7) Curl A square sample of 500 x 500 mm was cut from the original tape for magnetic recording, and its curl condition was classified into the following five grades: D and EVi curl: good; A, B, and C: curl:
It was determined to be defective.
A:完全に筒状を呈するもの。A: Completely cylindrical.
BAAに近い状態だが、筒の一部が開口しているもの。The condition is similar to BAA, but a part of the tube is open.
CABの開口部が広がったものであるが、側面の最長部
を円の直径とできるもの。This is a CAB with a widened opening, but the longest part of the side surface is the diameter of a circle.
D:Cの開FJ部がさらに広がりだものであり、側面の
最長部を円の直径とはでき
ないもの。D: The open FJ part of C is wider, and the longest part of the side surface cannot be the diameter of the circle.
E:カールの全くないもの、またはほとんどないもの。E: No or almost no curl.
実施例、比較例1〜4
平均粒子径0.15μmのシリカをfl、Q5重蓋%含
有してなる極限粘度0.60のポリエチレン2.6ナフ
タレンジカルポキシレートのペレットを170℃で4時
間乾燥した。このポリマーを常法に従って溶融押出L
L、厚さ7028mの未延伸フィルムを作成して、縦方
向VCI 20 ’Cで4.5倍、横方向に130°C
で4.0倍、逐次二軸延伸を行ない、更に245℃で3
0秒間熱固定を行ない、6arnのフィルム全作成した
。Examples, Comparative Examples 1 to 4 Pellets of polyethylene 2.6 naphthalene dicarpoxylate with an intrinsic viscosity of 0.60 containing fl, Q5 % of silica with an average particle size of 0.15 μm were dried at 170° C. for 4 hours. did. This polymer was melt-extruded according to a conventional method.
L, an unstretched film with a thickness of 7028 m was prepared, and the VCI was 4.5 times in the machine direction at 20'C and 130°C in the transverse direction.
Biaxial stretching was carried out sequentially by 4.0 times at
Heat fixation was performed for 0 seconds to complete a 6arn film.
なお、二軸勉伸フィルムは熱固定前に次の組成の塗液を
フィルム表面の片側に塗布した。In addition, before heat setting, the biaxial stretched film was coated with a coating liquid having the following composition on one side of the film surface.
フィルム表面に塗布した塗液の組成:
0アクリル酸アルミ(浅田化学に、に、 P −30)
2wt%溶液・・・・・・・・12kgoポリエチレン
グリコール
(日本油脂製 分子量19,000)
2wt%溶液・・・・・・・・・・5 kgOポリエチ
レングリコールジグリシジルエーテル(長潮産業製 N
EROI O■)2wt%溶液・・・・・・・・・・・
・・2 kgOポリオキシエチレンノニルフェニルエー
テル 2wt%溶液・・・・・・・・
・・・・・1 kg塗布ii!−はウェットで約2.2
g/rn’であり、固形分と【7で約0.0126 g
/醒である。Composition of the coating liquid applied to the film surface: 0 Aluminum acrylate (Asada Chemical Co., Ltd., P-30)
2wt% solution・・・・・・12kgO polyethylene glycol (manufactured by NOF Corporation, molecular weight 19,000) 2wt% solution・・・・・・・・・・・・5kgO polyethylene glycol diglycidyl ether (manufactured by Nagashio Sangyo N)
EROI O■) 2wt% solution・・・・・・・・・・・・
...2 kgO polyoxyethylene nonylphenyl ether 2wt% solution...
...1 kg application ii! - is about 2.2 when wet
g/rn', and the solid content and [7 are approximately 0.0126 g
/Awakening.
このポリエチレン2.6ナフタレンジカルポキシレー1
・のフィルム残り表面に電子ビーム蒸着法(Nl小入鼾
へ50°の斜方蒸着)で、厚さ1000AのCo−N、
層(Co/Nr 75 / 25重葉比)を蒸着し磁
気i1録用原反を得た。This polyethylene 2.6 naphthalenedicarpoxylate 1
・Co-N with a thickness of 1000A was deposited on the remaining surface of the film by electron beam evaporation (oblique evaporation at 50° to a small Nl entrance).
A layer (Co/Nr 75/25 heavy leaf ratio) was deposited to obtain an original fabric for magnetic i1 recording.
この原反を磁気テープとした時の特性ViMI表に示し
たとおり、保磁力、ドロップ・アウト。When this raw material is used as a magnetic tape, the properties as shown in the ViMI table include coercive force and dropout.
走行性ともに良好であった1、しかし、ポ1ノマールや
無機粒子が本発明外である場合(比較例1゜2)には、
如何に工夫しても、保磁力、ドロップ・アウト、走行性
ともに良好な磁気P録媒体用ベースフィルムは得ら扛な
かった。また、無機粒子の含有普が本発明外である場合
(比較例3、4)には、如何に工夫しても、保磁力、ド
ロップ・アニド、走行性ともに良好なフィルムは得られ
々かった。Both running properties were good. However, when the polynomal and inorganic particles were outside the scope of the present invention (Comparative Example 1゜2),
No matter how hard we try, we have not been able to obtain a base film for magnetic recording media that has good coercive force, dropout, and runnability. In addition, when the content of inorganic particles was outside the scope of the present invention (Comparative Examples 3 and 4), no matter how hard we tried, it was not possible to obtain a film with good coercive force, drop anide, and runnability. .
実施例2〜4.比較例5〜10
実MA91J1と同じノリ力とポリエチレン2.6ナフ
タレンジカルホキンレート金用いてノリ釣合有量、製膜
条件を変更[7て檀々のフィルム物性を有する二軸配向
フィルムを作った。これらのフィルムの磁気記録媒体と
しての特性を第2表に示した。第2表から分かるように
、フィルム物性が本発明の範囲内である場合(実施例2
〜4)には、保磁力、ドロップ・アウト、走行性がとも
に良好で、しかもカールも良好な磁気テープが得ら7’
した。しかし、フィルム物性が本発明外である場&(比
較例5〜9)には保磁力。Examples 2-4. Comparative Examples 5 to 10 Using the same glue force and polyethylene 2.6 naphthalene dicarphoquinelate gold as the actual MA91J1, the glue balance amount and film forming conditions were changed [7 to create a biaxially oriented film with the same film properties. Had made. Table 2 shows the properties of these films as magnetic recording media. As can be seen from Table 2, when the physical properties of the film are within the scope of the present invention (Example 2
~4) A magnetic tape with good coercive force, good dropout, and good runnability as well as good curling can be obtained.7'
did. However, in cases where the physical properties of the film are outside the scope of the present invention & (Comparative Examples 5 to 9), the coercive force.
ドロップ・アウト、走行性がともに抱付な磁気テープは
得らノtなかつfc。You can't get magnetic tape that has excellent drop out and runnability.
Claims (1)
であり、長さ方向のヤング率が800kg/mm^2以
上かつ幅方向のヤング率が500kg/mm^2以上で
あり、しかも表面粗さが0.005μm以下である二軸
配向されたポリエチレン−2,6−ナフタレンジカルボ
キシレートフイルムからなる支持体と、該支持体の一の
表面に形成された磁性金属薄膜と、該支持体の他の表面
に塗設された滑剤を含有する有機高分子からなる塗膜と
よりなる磁気記録テープ。 2)磁性金属薄膜がコバルト、鉄、ニッケル若しくはこ
れらの合金又はこれらとクロム、タングステンとの合金
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
磁気記録テープ。 3)磁性金属薄膜、支持体及び塗膜とからなり厚さが1
0μm以下であることを特徴とする特許請求の範囲第1
項又は第2項記載の磁気記録テープ。[Claims] 1) The 5% elongation stress in the length direction is 18 kg/mm^2 or more, the Young's modulus in the longitudinal direction is 800 kg/mm^2 or more, and the Young's modulus in the width direction is 500 kg/mm^2. 2 or more and a surface roughness of 0.005 μm or less, a support made of a biaxially oriented polyethylene-2,6-naphthalene dicarboxylate film, and a magnetic material formed on one surface of the support. A magnetic recording tape comprising a thin metal film and a coating film made of an organic polymer containing a lubricant coated on the other surface of the support. 2) The magnetic recording tape according to claim 1, wherein the magnetic metal thin film is made of cobalt, iron, nickel, an alloy thereof, or an alloy of these with chromium or tungsten. 3) Consisting of a magnetic metal thin film, a support and a coating film with a thickness of 1
Claim 1 characterized in that it is 0 μm or less
2. The magnetic recording tape according to item 1 or 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60166653A JPH0680525B2 (en) | 1985-07-30 | 1985-07-30 | Magnetic recording tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60166653A JPH0680525B2 (en) | 1985-07-30 | 1985-07-30 | Magnetic recording tape |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6228918A true JPS6228918A (en) | 1987-02-06 |
JPH0680525B2 JPH0680525B2 (en) | 1994-10-12 |
Family
ID=15835253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60166653A Expired - Lifetime JPH0680525B2 (en) | 1985-07-30 | 1985-07-30 | Magnetic recording tape |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0680525B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62135339A (en) * | 1985-12-09 | 1987-06-18 | Diafoil Co Ltd | Polyethylene-2,6-naphthalate film for magnetic recording medium |
JPS63113931A (en) * | 1986-10-31 | 1988-05-18 | Teijin Ltd | Magnetic recording medium |
JPH01292624A (en) * | 1988-05-18 | 1989-11-24 | Toyobo Co Ltd | Base film for magnetic tape |
JPH0440624A (en) * | 1990-06-07 | 1992-02-12 | Diafoil Co Ltd | Polyester film for magnetic recording medium |
WO1999046765A1 (en) * | 1998-03-13 | 1999-09-16 | Hitachi, Ltd. | Magnetic recording medium and magnetic memory |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50100174A (en) * | 1974-01-10 | 1975-08-08 | ||
JPS5826316A (en) * | 1981-08-10 | 1983-02-16 | Sony Corp | Magnetic recording medium |
JPS58155939A (en) * | 1982-03-11 | 1983-09-16 | 東レ株式会社 | Composite film |
JPS59203230A (en) * | 1983-05-04 | 1984-11-17 | Teijin Ltd | Biaxially oriented polyester film |
JPS59207421A (en) * | 1983-05-11 | 1984-11-24 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS60125921A (en) * | 1983-12-12 | 1985-07-05 | Toray Ind Inc | Composite polyester film for magnetic recording medium |
-
1985
- 1985-07-30 JP JP60166653A patent/JPH0680525B2/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50100174A (en) * | 1974-01-10 | 1975-08-08 | ||
JPS5826316A (en) * | 1981-08-10 | 1983-02-16 | Sony Corp | Magnetic recording medium |
JPS58155939A (en) * | 1982-03-11 | 1983-09-16 | 東レ株式会社 | Composite film |
JPS59203230A (en) * | 1983-05-04 | 1984-11-17 | Teijin Ltd | Biaxially oriented polyester film |
JPS59207421A (en) * | 1983-05-11 | 1984-11-24 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS60125921A (en) * | 1983-12-12 | 1985-07-05 | Toray Ind Inc | Composite polyester film for magnetic recording medium |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62135339A (en) * | 1985-12-09 | 1987-06-18 | Diafoil Co Ltd | Polyethylene-2,6-naphthalate film for magnetic recording medium |
JPH0559813B2 (en) * | 1985-12-09 | 1993-09-01 | Diafoil Hoechst Co Ltd | |
JPS63113931A (en) * | 1986-10-31 | 1988-05-18 | Teijin Ltd | Magnetic recording medium |
JPH01292624A (en) * | 1988-05-18 | 1989-11-24 | Toyobo Co Ltd | Base film for magnetic tape |
JPH0440624A (en) * | 1990-06-07 | 1992-02-12 | Diafoil Co Ltd | Polyester film for magnetic recording medium |
WO1999046765A1 (en) * | 1998-03-13 | 1999-09-16 | Hitachi, Ltd. | Magnetic recording medium and magnetic memory |
US6329037B1 (en) | 1998-03-13 | 2001-12-11 | Hitachi, Ltd. | Magnetic recording medium and magnetic memory |
US6491798B2 (en) | 1998-03-13 | 2002-12-10 | Hitachi, Ltd. | Magnetic recording medium and magnetic storage apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0680525B2 (en) | 1994-10-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |