JPS63298810A - Magnetic tape - Google Patents
Magnetic tapeInfo
- Publication number
- JPS63298810A JPS63298810A JP13142087A JP13142087A JPS63298810A JP S63298810 A JPS63298810 A JP S63298810A JP 13142087 A JP13142087 A JP 13142087A JP 13142087 A JP13142087 A JP 13142087A JP S63298810 A JPS63298810 A JP S63298810A
- Authority
- JP
- Japan
- Prior art keywords
- young
- modulus
- magnetic tape
- 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.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- -1 polyethylene terephthalate Polymers 0.000 description 13
- 229920000139 polyethylene terephthalate Polymers 0.000 description 8
- 239000005020 polyethylene terephthalate Substances 0.000 description 8
- 239000006247 magnetic powder Substances 0.000 description 7
- 239000003973 paint Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium dioxide Chemical compound O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 229910001337 iron nitride Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 125000005487 naphthalate group Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
従来の技術
磁気テープはビデオ分野、オーディオ分野、コンピュー
タ分野等で広く使用されているが、例えばビデオ分野の
磁気テープは、磁性粉と、無機質沿剤と、結合剤と、溶
剤等からなる磁性塗料をポリエチレンテレフタレート等
のベースフィルム表面に塗布・乾燥して磁性塗膜を形成
した塗布型のものが多（用いられている。DETAILED DESCRIPTION OF THE INVENTION Conventional magnetic tapes are widely used in the video field, audio field, computer field, etc.; There are many coating type products in use, in which a magnetic paint made of a solvent or the like is applied onto the surface of a base film such as polyethylene terephthalate and dried to form a magnetic coating.
このような磁気テープは、ビデオテープレコーダの小型
化に伴ってコンパクトにセットされ、しかも単位面積当
たりの情報記録量を多くできる記録の高密度化が要望さ
れている。この要望を満たずためには、記録層を支持す
るベースフィルムを薄くするとともに、記録層を薄く設
けしかも磁性粉には微細化した粒子を用いることが行わ
れている。With the miniaturization of video tape recorders, there is a demand for such magnetic tapes to be set compactly and to have higher recording densities that can increase the amount of information recorded per unit area. In order to meet this demand, the base film supporting the recording layer is made thinner, the recording layer is provided thinner, and finer particles are used as the magnetic powder.
このような磁気テープを例えばビデオテープレコーダに
セットすると、磁気テープはシリンダドラムの周面を斜
めに摺擦しながら移動する。この際、ビデオテープレコ
ーダの記録・再生用ヘッドはシリンダドラムの中心軸を
回転軸とし、シリンダドラムの周面に設けられたスリッ
トに沿って回転する。このヘッドはシリンダドラムの周
面よりわずかに突出しており、その先端が上記磁気テー
プを擦ることにより磁気テープの長手方向に対して斜め
に走査する。When such a magnetic tape is set in, for example, a video tape recorder, the magnetic tape moves while sliding obliquely on the circumferential surface of the cylinder drum. At this time, the recording/reproducing head of the video tape recorder rotates along a slit provided on the circumferential surface of the cylinder drum, with the central axis of the cylinder drum as the rotation axis. This head slightly protrudes from the circumferential surface of the cylinder drum, and its tip rubs against the magnetic tape, thereby scanning obliquely to the longitudinal direction of the magnetic tape.
このように走行する磁気テープをシリンダドラムの周面
で擦りながらこの周面かられずかに突出したヘッドでさ
らに擦ると、磁気テープはヘッドにより斜めに押圧され
ながら走行することになり、長手方向とその直角方向の
幅方向に張力の分力を生じる。When the magnetic tape running in this way is rubbed against the circumferential surface of the cylinder drum and further rubbed by the head that slightly protrudes from the circumferential surface, the magnetic tape runs while being pressed diagonally by the head, causing it to move in the longitudinal direction. A component of tension is generated in the width direction in the perpendicular direction.
発明が解決しようとする問題点
このように長手方向のみならず幅方向にも張力を受ける
磁気テープを従来のように、長手方向のヤング率を高く
、幅方向のヤング率を小さくすると、幅方向への張力の
分力を受けてテープが変形し、ヘッドとの接触圧が変化
したり、あるいは磁気テープがヘッドから浮いたりする
ためヘッドの磁気テープに対する接触状態がその都度変
化して輝度信号出力が低下するという問題点があった。Problems to be Solved by the Invention If a magnetic tape is subjected to tension not only in the longitudinal direction but also in the width direction, as in the past, if the Young's modulus in the longitudinal direction is made high and the Young's modulus in the width direction is made small, The tape deforms due to the tension component on the tape, and the contact pressure with the head changes, or the magnetic tape floats away from the head, so the contact state of the head with the magnetic tape changes each time, causing a brightness signal to be output. There was a problem in that the value decreased.
本発明の目的は、出力変動の少ない磁気テープを提供す
ることにある。An object of the present invention is to provide a magnetic tape with less fluctuation in output.
問題点を解決するための手段
本発明は、上記問題点を解決するために、非磁性基体上
に磁気記録層を有する磁気テープにおいて、該磁気テー
プの長手方向のヤング率が幅方向のヤング率より小さい
ことを特徴とする磁気テープを提供することにある。Means for Solving the Problems In order to solve the above problems, the present invention provides a magnetic tape having a magnetic recording layer on a non-magnetic substrate, in which the Young's modulus in the longitudinal direction of the magnetic tape is equal to the Young's modulus in the width direction. An object of the present invention is to provide a magnetic tape characterized by its smaller size.
次ぎに本発明の詳細な説明する。Next, the present invention will be explained in detail.
本発明においては、非磁性基体上に磁気記録層を有する
磁気テープの長手方向のヤング率が幅方向のヤング率よ
り低いが、これを実現するためには、非磁性基体の長手
方向のヤング率より幅方向のヤング率を高くすることが
望ましい。特にこの非磁性基体に磁性塗料を塗布し磁性
粉を配向させるときは長手方向のヤング率の高くなる割
合が幅方向のヤング率の高くな！る割合より多いので非
磁性基体の幅方向のヤング率を一層高くするごとが必要
になる。In the present invention, the Young's modulus in the longitudinal direction of a magnetic tape having a magnetic recording layer on a non-magnetic substrate is lower than the Young's modulus in the width direction. It is desirable to increase the Young's modulus in the width direction. In particular, when applying magnetic paint to this non-magnetic substrate and orienting magnetic powder, the Young's modulus in the longitudinal direction increases at a higher rate than the Young's modulus in the width direction! Therefore, it is necessary to further increase the Young's modulus in the width direction of the nonmagnetic substrate.
この磁気テープの長手方向のヤング率、幅方向のヤング
率を決める他の要因としては、磁気記録層の組成、磁気
記録層の磁性粉の配向の程度等が挙げられるが、これら
がどのような関係になれば幅方向のヤング率が長手方向
のヤング率より大きくなるかについては詳細を省くが、
本発明においては、出来上がった磁気テープの長手方向
のヤング率が幅方向のヤング率より低ければ良く、これ
は磁気テープについてヤング率を測定することによって
分かる。Other factors that determine Young's modulus in the longitudinal direction and width direction of this magnetic tape include the composition of the magnetic recording layer, the degree of orientation of the magnetic powder in the magnetic recording layer, etc. I will omit the details of whether the Young's modulus in the width direction will be larger than the Young's modulus in the longitudinal direction if the relationship is established, but
In the present invention, it is sufficient that the Young's modulus in the longitudinal direction of the finished magnetic tape is lower than the Young's modulus in the width direction, and this can be determined by measuring the Young's modulus of the magnetic tape.
本発明において使用する非磁性基体の素材としては、ポ
リエチレンテレフタレート、ポリエチレン２，６ナフタ
レート等のポリエステル類（酸成分、アルコール成分と
して第３成分を変性剤として縮重合したものも含まれる
）、ポリエチレン。Materials for the nonmagnetic substrate used in the present invention include polyesters such as polyethylene terephthalate and polyethylene 2,6 naphthalate (including those obtained by condensation polymerization using a third component as an acid component and an alcohol component as a modifier), and polyethylene.
ポリプロピレン等のポリオレフィン類、セルローストリ
アセテート、セルロースダイアセテート。Polyolefins such as polypropylene, cellulose triacetate, cellulose diacetate.
セルロースアセテートブチレート等のセルロース誘導体
、ポリ塩化ビニル、ポリ塩化ビニリデン等のビニル系樹
脂、ポリカーボネート、ポリイミド、ポリアミドイミド
、ポリアミド等のプラスチックス等が使用でき、これら
は透明でも不透明でも良く、通常はフィルムに磁気記録
層を設けてからスリットしてテープが作られる。これら
の例えばプラスチックスのフィルムは二軸延伸すること
により直角の二方向のヤング率が異なるものを作ること
ができる。Cellulose derivatives such as cellulose acetate butyrate, vinyl resins such as polyvinyl chloride and polyvinylidene chloride, and plastics such as polycarbonate, polyimide, polyamideimide, and polyamide can be used, and these may be transparent or opaque, and are usually films. A magnetic recording layer is provided on the tape and the tape is then slit. These plastic films, for example, can be biaxially stretched to produce films with different Young's moduli in two orthogonal directions.
また、本発明において、磁気記録層は磁性塗料を上記基
体上に塗布することにより形成されるが、この磁性塗料
としては、γ−Ｆｅ２Ｏ３、Ｃｏ被被着−Ｆ＋３２０３
、ＣｒＯ２、金属磁性粉、窒化鉄磁性粉等の磁性粉に
結合剤、溶剤、分散剤、研磨剤、充填剤、帯電防止剤、
防錆剤、防かび剤等を適宜混１合してｊ周製される。In addition, in the present invention, the magnetic recording layer is formed by applying a magnetic paint onto the above substrate, and the magnetic paint includes γ-Fe2O3, Co-coated-F+3203
, CrO2, magnetic powder such as metal magnetic powder, iron nitride magnetic powder, binder, solvent, dispersant, abrasive, filler, antistatic agent,
It is prepared by appropriately mixing a rust preventive agent, a fungicide, etc.
また、上記磁性塗料を上記基体上に塗布する方法として
は、ドクターブレード、リバースロール、グラビアロー
ル、スピンナーコートなどの公知の塗布手段が挙げられ
、用途によって磁性粉を配向させて乾燥し、表面平滑処
理を施して磁気テープを形成する。In addition, as a method for applying the above-mentioned magnetic paint onto the above-mentioned substrate, known application means such as a doctor blade, reverse roll, gravure roll, and spinner coating can be used. Processing is performed to form a magnetic tape.
作用
磁気テープの長手方向のヤング率が幅方向のヤング率よ
り小さいと、磁気テープがビデオテープレコーダの周面
を擦りながら走行中にヘッドがら磁気テープの幅方向に
及ぼされる張力を十分に支えることができ、その幅方向
の変形を少なくし、ヘッドの接触圧を一定にすることが
できる。Function: If the Young's modulus in the longitudinal direction of the magnetic tape is smaller than the Young's modulus in the width direction, the magnetic tape will be able to sufficiently support the tension exerted by the head in the width direction of the magnetic tape while it is running while rubbing against the peripheral surface of the video tape recorder. This makes it possible to reduce deformation in the width direction and keep the contact pressure of the head constant.
実施例 次ぎに本発明の詳細な説明する。Example Next, the present invention will be explained in detail.
針状金属磁性粉（平均長軸０．２５μｍ）１００ ｉｉ
量部と、塩化ビニル−酢酸ビニル共重合体樹脂１２重量
部、ポリウレタン樹脂８重量部、トルエン１３５Ｍ量部
、メチルエチルケトン１３５ 重ｊ１５、シクロへキサ
ノン３０重量部と、無機質滑剤としてＡ１２ｏ３粉５Ｍ
量部と、有機滑剤として脂肪酸エステル３重量部とから
なる混合物をサンドミルにより混練した後ポリイソシア
ネートを４Ｍ量部加えてさらに混練し、磁性塗料をｔＦ
ＭＭする。Acicular metal magnetic powder (average major axis 0.25 μm) 100 ii
12 parts by weight of vinyl chloride-vinyl acetate copolymer resin, 8 parts by weight of polyurethane resin, 135 M parts of toluene, 135 parts by weight of methyl ethyl ketone, 30 parts by weight of cyclohexanone, and 5 M of A12O3 powder as an inorganic lubricant.
and 3 parts by weight of fatty acid ester as an organic lubricant were kneaded in a sand mill, and then 4M parts of polyisocyanate was added and further kneaded, and the magnetic paint was coated with tF.
MM.
この塗料を厚さ１５μｍ、縦方向（長手方向）のヤング
率と横方向（幅方向）のヤング率との比が０．７である
二軸延伸したポリエチレンテレフタレートフィルム上に
グラビア方式によって５００ ｔｍの幅に塗布し、長手
方向に磁場配向する。ついで乾燥、カレンダー処理、硬
化反応処理等公知の処理を行なう。この処理の後の磁気
記録層の厚みは４μｍである。この後長手方向の長さ２
００ ｍ重、幅方向の長さ１２．６５ ｔｍの試験片テ
ープＡと、幅方向の長さ２００顛、長手方向の長さ１２
．６５鶴の試験片テープＢを切り出し、これらのそれぞ
れの試験片テープから塗布時の長手方向と幅方向とのヤ
ング率を次の方法によって測定した。This coating material was applied to a biaxially stretched polyethylene terephthalate film having a thickness of 15 μm and a ratio of Young's modulus in the longitudinal direction (longitudinal direction) to Young's modulus in the transverse direction (width direction) of 0.7 by gravure. Apply it across the width and orient it in a magnetic field in the longitudinal direction. Then, known treatments such as drying, calendering, hardening reaction treatment, etc. are performed. The thickness of the magnetic recording layer after this treatment is 4 μm. After this length in the longitudinal direction 2
Test piece tape A with a weight of 00 m and a length in the width direction of 12.65 tm, a length of 200 meters in the width direction and a length of 12 in the longitudinal direction.
．． Test piece tape B of 65 cranes was cut out, and the Young's modulus in the longitudinal direction and the width direction at the time of coating was measured from each of these test piece tapes by the following method.
まずテープの厚みを測定し、テープ断面積Ｓを求めた後
、ストログラフＭ（東洋精機型）、に該テープの一端を
固定し、テープの他端を上下に移動可能なロードセルに
固定する。このロードセルを５ｆｌ／ｍｉｎの速度で上
昇させながらテープに加重Ｆを加え、該加重Ｆとテープ
の伸びを記録チャートに自動的に記録した。測定は伸び
がテープ寸法の１０％に達した時点で停止し、記録チャ
ート上で、テープの元の長さの０．３％伸びた点、即ち
０．６ ｔｍ伸びた点のＦを読み取り、次式によりそれ
ぞれのヤング率Ｅを求めた。First, after measuring the thickness of the tape and determining the tape cross-sectional area S, one end of the tape is fixed to a Strograph M (Toyo Seiki model), and the other end of the tape is fixed to a vertically movable load cell. A load F was applied to the tape while raising the load cell at a rate of 5 fl/min, and the load F and tape elongation were automatically recorded on a recording chart. The measurement was stopped when the elongation reached 10% of the tape dimension, and on the recording chart, read F at the point at which the tape had elongated by 0.3% of its original length, that is, at the point at which it had elongated by 0.6 tm. Each Young's modulus E was determined using the following formula.
Ｓ Δｌ
但し Ｆ：加重 （ｋｇ重）
Ｓ：テープの断面積（ｎ？）
Ｉｌ：被測定部の長さくｍ）
Δｌ：変形量 （ｍ）
このようにして求めた試験片テープＡのヤング率すなわ
ち縦方向ヤング率Ｅａと、試験片テープＢのヤング率す
なわち横方向のヤング率Ｅｂの比Ｅａ／Ｅｂを求めて表
に示した。S Δl where F: Load (kg weight) S: Cross-sectional area of the tape (n?) Il: Length of the part to be measured (m) Δl: Deformation amount (m) Young's modulus of the test piece tape A obtained in this way That is, the ratio Ea/Eb of the Young's modulus in the longitudinal direction Ea and the Young's modulus of the test piece tape B, that is, the Young's modulus in the lateral direction Eb, was determined and shown in the table.
次ぎに上記で得られた磁気記録層を形成したフィルムの
長手方向に１／２インチ巾でスリフトし、長平方向に磁
気配向した磁気テープを作製した。Next, the film on which the magnetic recording layer obtained above was formed was slipped in a width of 1/2 inch in the longitudinal direction to produce a magnetic tape with magnetic orientation in the longitudinal direction.
このテープをビデオテープレコーダ（日本ビクタ社製
ＢＲ−７０００＞とオンシロスコープとスペクトラムア
ナライザとを接続し、上記で得られた磁気液テープの４
ＭＨｚに於ける出力比を従来の磁気テープ（比較例）
をＯｄＢとして求め、これを表に示す。This tape was recorded using a videotape recorder (manufactured by Japan Victor Co., Ltd.).
BR-7000>, an oncilloscope, and a spectrum analyzer, and the magnetic liquid tape obtained above was
Output ratio at MHz compared to conventional magnetic tape (comparative example)
is calculated as OdB and shown in the table.
実施例２
実施例１に於いて、ポリエチレンテレフタレートフィル
ムの縦方向のヤング率と横方向のヤング率の比をＨａ／
Ｅｂ ＝０．８とした以外は同様にして試験片テープＡ
、Ｂ及び磁気テープを作製し、実施例１と同様にして測
定した結果を表に示す。Example 2 In Example 1, the ratio of Young's modulus in the longitudinal direction and Young's modulus in the lateral direction of the polyethylene terephthalate film was set as Ha/
Test piece tape A was prepared in the same manner except that Eb = 0.8.
, B and a magnetic tape were prepared and measured in the same manner as in Example 1. The results are shown in the table.
実施例３
実施例１に於いて、ポリエチレンテレフタレートフィル
ムの厚みを１６μｍ１このフィルムの縦方向のヤング率
と横方向のヤング率の比をＥａ／Ｅｂ ＝０．８とした
ことと、磁気記録層の厚さを３μｍとしたこと以外は同
様にして試験片テープＡ、Ｂ及び磁気テープを作製し、
実施例１と同様にして測定した結果を表に示す。Example 3 In Example 1, the thickness of the polyethylene terephthalate film was 16 μm1. Test piece tapes A, B and magnetic tape were produced in the same manner except that the thickness was 3 μm,
The results measured in the same manner as in Example 1 are shown in the table.
実施例４
実施例１に於いて、ポリエチレンテレフタレートフィル
ムの厚みを１３μｍ、このフィルムの［向のヤング率と
横方向のヤング率の比をＥａ／Ｅｂ ＝０．７としたこ
とと、磁気記録層の厚さを６．５μｍとしたこと以外は
同様にして試験片テープＡ、Ｂ及び磁気テープを作製し
、実施例１と同様にして測定した結果を表に示す。Example 4 In Example 1, the thickness of the polyethylene terephthalate film was 13 μm, the ratio of the Young's modulus in the [direction to the Young's modulus in the lateral direction of this film was Ea/Eb = 0.7, and the magnetic recording layer was Test piece tapes A, B and magnetic tape were prepared in the same manner as in Example 1 except that the thickness of the sample was 6.5 μm, and the results are shown in the table.
実施例５
実施例１に於いて、ポリエチレンテレフタレートフィル
ムの厚みを１７μｍ１このフィルムの縮方向のヤング率
と横方向のヤング率の比をＥａ／Ｅｂ ＝０．７５とし
たことと、磁気記録層の厚さを２．０ μｌとしたこと
以外は同様にして試験片テープＡ、Ｂ及び磁気テープを
作製し、実施例１と同様にして測定した結果を表に示す
。Example 5 In Example 1, the thickness of the polyethylene terephthalate film was 17 μm1. Test piece tapes A and B and magnetic tape were prepared in the same manner as in Example 1 except that the thickness was 2.0 μl, and the results are shown in the table.
比較例
実施例１において、ポリエチレンテレフタレートフィル
ムの縦方向のヤング率と横方向のヤング率の比をＥａ／
Ｅｂ ＝ １．０５としたこと以外は同様にして試験片
テープＡ、Ｂ及び磁気テープを作製し、実施例１と同様
にして測定した結果を表に示す。Comparative Example In Example 1, the ratio of Young's modulus in the longitudinal direction and Young's modulus in the lateral direction of the polyethylene terephthalate film was Ea/
Test piece tapes A, B and magnetic tape were prepared in the same manner as in Example 1 except that Eb = 1.05, and the results were measured in the same manner as in Example 1, and the results are shown in the table.
上記結果より比較例のものに比べ実施例のものはいずれ
も輝度信号出力が大きいことがわかる。From the above results, it can be seen that the brightness signal output of each of the examples is larger than that of the comparative example.
発明の効果 ゛
本発明によれば、磁気テープの長手方向のヤング率を幅
方向のヤング率より小さくしたので、記録・再生ヘッド
に磁気テープが擦られても、磁気テープの幅方向の変形
が少く、磁気チー、ブがヘッド正面から浮（ことが少く
なり、輝度信号出力を高くすることが可能になる。Effects of the Invention According to the present invention, since the Young's modulus in the longitudinal direction of the magnetic tape is made smaller than the Young's modulus in the width direction, even when the magnetic tape is rubbed by the recording/reproducing head, the deformation of the magnetic tape in the width direction is prevented. The magnetic chips are less likely to float from the front of the head, making it possible to increase the brightness signal output.
このようにして小型化された例えばビデオテープレコー
ダにセットされて使用されるのに適する優れた磁気テー
プを提供することができ、これにより信号の効率的な記
録及び再生を行うことができるとともに、高密度記録を
効果的に行うことができる。In this way, it is possible to provide an excellent magnetic tape that is miniaturized and is suitable for use by being set in, for example, a video tape recorder, which enables efficient recording and reproduction of signals, and High-density recording can be performed effectively.
昭和６２年０５月２９日May 29, 1986
Claims (1)
おいて、該磁気テープの長手方向のヤング率が幅方向の
ヤング率より小さいことを特徴とする磁気テープ。(1) A magnetic tape having a magnetic recording layer on a non-magnetic substrate, characterized in that the Young's modulus in the longitudinal direction of the magnetic tape is smaller than the Young's modulus in the width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13142087A JPS63298810A (en) | 1987-05-29 | 1987-05-29 | Magnetic tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13142087A JPS63298810A (en) | 1987-05-29 | 1987-05-29 | Magnetic tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63298810A true JPS63298810A (en) | 1988-12-06 |
Family
ID=15057545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13142087A Pending JPS63298810A (en) | 1987-05-29 | 1987-05-29 | Magnetic tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63298810A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419961A (en) * | 1992-11-20 | 1995-05-30 | Victor Company Of Japan, Ltd. | Magnetic recording medium with specified transverse and machine direction Young's modulus of the polyester film base |
| US6544635B2 (en) | 2000-09-18 | 2003-04-08 | Victor Company Of Japan, Limited | Magnetic recording medium |
-
1987
- 1987-05-29 JP JP13142087A patent/JPS63298810A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419961A (en) * | 1992-11-20 | 1995-05-30 | Victor Company Of Japan, Ltd. | Magnetic recording medium with specified transverse and machine direction Young's modulus of the polyester film base |
| US6544635B2 (en) | 2000-09-18 | 2003-04-08 | Victor Company Of Japan, Limited | Magnetic recording medium |
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