JPS5837840A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5837840A JPS5837840A JP57126081A JP12608182A JPS5837840A JP S5837840 A JPS5837840 A JP S5837840A JP 57126081 A JP57126081 A JP 57126081A JP 12608182 A JP12608182 A JP 12608182A JP S5837840 A JPS5837840 A JP S5837840A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- fatty acid
- layer
- recording medium
- 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
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
- G11B5/7356—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 comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2
Landscapes
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気配縁媒体に関し、特に８／Ｎを低下させる
ことなく摩擦係数の低下、走行耐久性の向上、テープの
耳折れなどのない優れた磁気テープに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetically aligned medium, and more particularly to an excellent magnetic tape that has a reduced coefficient of friction without reducing 8/N, improved running durability, and is free from tape edge folding.
一般に、オーデオ用、ビデオ用あるいはコンビエータ−
用の磁気配縁テープでは、感ｌｌ！特に高周波領域での
出力を改善するために磁気記録層の表面が平滑に仕上け
られている。しかし、このような平滑な磁気記鍮テープ
は、巻取９、巻戻しの際に整然と巻き取られず乱巻状態
を起し中すい。このような磁気記碌テープを使用すると
、張力変動などによシ走行性が悪くな）出力が変動する
。又、テープの変形、損傷も起こ）やすい。この欠点を
防ぐために、磁気記録層と反対側の支持体表面にパック
層を設は九磁気配縁テープが提案されている。Generally used for audio, video or combiator
With the magnetic tape for use, you can feel it! In particular, the surface of the magnetic recording layer is finished to be smooth in order to improve the output in the high frequency range. However, such a smooth magnetic brass tape is not wound in an orderly manner during winding 9 and unwinding, and tends to wind up randomly. If such a magnetic recording tape is used, the running properties will be poor due to tension fluctuations, etc., and the output will fluctuate. In addition, the tape is easily deformed and damaged. In order to avoid this drawback, a magnetically distributed tape has been proposed in which a pack layer is provided on the surface of the support opposite to the magnetic recording layer.
しかしながら、従来よプ使用されているパック要用のバ
インダー、たとえば塩ビー酢ビ共重合体などでは、耐摩
耗性、靭性などが悪く、走行耐久性に悪影響を及ぼし、
摩擦係数の増加、テープの折れなどが生じやすく、更に
改真の余地がある。However, conventionally used binders for packs, such as vinyl chloride-vinyl acetate copolymer, have poor abrasion resistance and toughness, and have a negative impact on running durability.
This tends to increase the coefficient of friction and cause the tape to break, so there is still room for improvement.
また、一般に走行特性中走行耐久性を向上することを目
的としてパック層を賦与すると磁性媒体（特にテープ状
の場合）がロール状に巻き込まれたり、７−ト状で積み
重合せられ九場合、パック層の凹凸が磁性層表面に写）
、磁性層の表面性が損われ、この丸め磁性媒体の電磁特
性、轡に８／Ｎ特性が損われることが知られている。８
／Ｎ％性が低下するのは、しばしばパック層の走行特性
を重しる余り、その１表面状態が粗くなり、このたぐ磁
性媒体が巻き込まれ九ム積み重ねられたりした状態で保
存または放置されると、パック層の凹凸が磁性層表面に
写るからである。Additionally, when a pack layer is generally provided for the purpose of improving running characteristics and running durability, the magnetic medium (especially in the case of tape form) may be wound up in a roll form or piled up in a 7-piece form. The unevenness of the pack layer is reflected on the surface of the magnetic layer)
It is known that the surface properties of the magnetic layer are impaired, and the electromagnetic characteristics, particularly the 8/N characteristics, of the rounded magnetic medium are impaired. 8
The reason why the /N% property decreases is that the running characteristics of the pack layer are often affected too much, the surface condition of the pack layer becomes rough, and the magnetic media are stored or left in a state where they are rolled up and piled up. This is because the unevenness of the pack layer will be reflected on the surface of the magnetic layer.
本発明の目的は摩擦係数の増加しない、走行耐久性の良
い磁気記鍮媒体を提供しようとするものである。An object of the present invention is to provide a magnetic recording medium that does not increase the coefficient of friction and has good running durability.
本発明の別の目的は、磁性媒体の８７Ｎ特性を損わない
ようなパック層を提供しようとするものである。Another object of the present invention is to provide a packing layer that does not impair the 87N characteristics of the magnetic medium.
本発！＋１０上記の目的は、（１）粒径０．１μ以下の
無機質粉末又はカーボンブラック、（２）炭素数７２以
上の脂肪酸又は脂肪酸エステル、及び（３）バインダー
として、繊維素系樹脂、熱可履性ポリウレタンエクスト
マー及びポリイソシアネートを含有するパック層を使用
することによって達成される。The real deal! +10 The above purpose is to use (1) an inorganic powder or carbon black with a particle size of 0.1μ or less, (2) a fatty acid or fatty acid ester with a carbon number of 72 or more, and (3) a cellulose resin or a thermoplastic as a binder. This is achieved by using a pack layer containing a polyurethane extomer and a polyisocyanate.
磁性層と反対側の支持体面にパック層を設けた磁気配縁
媒体については既に知られているが（特公ａＳ≠デー１
１２／号、特開Ｎｉ−ター１１３０１号など）、本発明
のＡツク層はこれらのパック層に上記のくり〜（８）の
成分を含有する点に特徴を有する。以下、これらの成分
について説明する。A magnetic alignment medium in which a pack layer is provided on the support surface opposite to the magnetic layer is already known (Special Publication aS≠Day 1).
No. 12/, JP-A No. 11301, etc.), the A pack layer of the present invention is characterized in that these pack layers contain the above-mentioned components (8). These components will be explained below.
無機質粉末は・（ツク層の表面粗さ、電気抵抗の調節等
の目的で使用されるもので、たとえばカーボンブラック
粉末、グラファイト、二硫化タングステン、二硫化モリ
ブデン、窒化ホウ素、８ｉ０．、Ｃａ ＣＯｓ、α−ム
Ａ’！０１ ”−”１０３、ＴＩＯ，、Ｍｎ−０，Ｚ
ｎＯ１Ｃａｒなどがある。Inorganic powders are used for the purpose of adjusting the surface roughness of the layer and electrical resistance, such as carbon black powder, graphite, tungsten disulfide, molybdenum disulfide, boron nitride, 8i0., CaCOs, α-M A'!01 ”-”103,TIO,,Mn-0,Z
Examples include nO1Car.
カーボンブラックや無機質粉末の平均粒子径は０．０／
〜０．２μが良く、特に０．０２〜０゜ｌμが好ましい
。また、硬度はモース硬度でｆ以下が一般的であるが、
大きいものより小さいものが使いやすく、具体的にはモ
ース硬度コ〜７、特にコ、！〜Ｊ、Ｊ＠度である。カー
ボンブラック又は無機質粉末の使用量は、バインダーに
対して重量比で／−参、特にコ〜Ｊである。The average particle size of carbon black and inorganic powder is 0.0/
~0.2μ is good, and 0.02~0°lμ is particularly preferred. In addition, the hardness is generally less than f on the Mohs scale,
Smaller ones are easier to use than larger ones, specifically Mohs' hardness of Co ~ 7, especially Co! ~J, J@ degree. The amount of carbon black or inorganic powder to be used is in a weight ratio of 0 to 1, especially 0 to 0, based on the weight of the binder.
炭素数７２以上の脂肪酸又は脂肪酸エステルはパック層
の摩擦係数を下げ、走行性を良くシ、耐久性を向上させ
る目的で使用さ°れるもので、特に好ましくは炭素数１
１−ココの脂肪酸である。潤滑剤は最初から／（２り層
に添加しておくことが一般的であるが、パック層へ添加
する代シに他の方法によってあとから付与しても同様な
効果が得られる。Fatty acids or fatty acid esters having 72 or more carbon atoms are used for the purpose of lowering the friction coefficient of the pack layer, improving running properties, and improving durability, and fatty acids with 1 carbon number or more are particularly preferred.
1-This is a fatty acid. The lubricant is generally added to the second layer from the beginning, but the same effect can be obtained by adding it later by another method instead of adding it to the pack layer.
本発明で使用する繊維素系樹脂としては、ニドｃｘ−ｋ
ｋａ−ス等の如きセルロース誘導体が適当で、これらは
、耐熱性、靭性、耐ブロッキング性を付与するのに役立
）。As the cellulose resin used in the present invention, nido cx-k
Suitable are cellulose derivatives such as ka-su, etc., which serve to impart heat resistance, toughness, and anti-blocking properties).
熱可履性ポリウレタンエツストマーとしては、はとんど
全ての市販品を使用できる。即ち、フタル酸、アジぜン
酸、二量化すルイ／酸、マレイン酸の如き有機二塩基酸
と、エチレングリコール、プｗｆレンゲリコール、ブチ
レングリコール、ジエチレングリコールなどのグリプー
ル類又はトリメチロールプロパン、ヘキナントリオール
、グリセ！７７％）リメチ四−ルエタン、ｋ／タエリス
リトールなどの多価アルコール類との反応によって得ら
れるポリエステルポリオールをトリレンジインクアネー
ト、参、Ｉｃ／−ジフェニルメタンジイソシアネート、
ヘキナメテレンジインシアネート、メタキクリレンジイ
ンシアネートの如きポリイソシアネート化合物によって
ウレタン化したポリエステルポリウレタン樹脂及びポリ
エーテルポリウレタン樹脂、更に一般式（１）で示され
る分子のされる。As the thermoplastic polyurethane elastomer, almost all commercially available products can be used. That is, organic dibasic acids such as phthalic acid, azizic acid, dimerizing acid, maleic acid, and glycols such as ethylene glycol, fluorene glycol, butylene glycol, diethylene glycol, trimethylolpropane, hequinanthate, etc. Riolu, Grise! 77%) Polyester polyols obtained by reaction with polyhydric alcohols such as rimethyl-4-ethane, k/taerythritol, etc.
Polyester polyurethane resins and polyether polyurethane resins urethanized with polyisocyanate compounds such as hequinamethylene diinocyanate and methoxycyclylene diinocyanate, as well as molecules represented by the general formula (1).
ＣＩ）式
但しｍはＩ〜１００の整数、Ｒは炭素数７〜ダ個のヒト
四キシアルキル基又は炭素数ｌ〜参個のヒドロキシアル
コキシル基を少くとも１個有した脂環族又は芳香族化合
物によって導入されるコ価ＣＨ。CI) formula, where m is an integer of I to 100, R is an alicyclic or aromatic compound having at least one human tetraxyalkyl group having 7 to 2 carbon atoms or a hydroxyalkoxyl group having 1 to 3 carbon atoms The covalue CH introduced by.
〜１の整数である。It is an integer between ~1.
これらの分子量はｊ、０００，１００，０００、好まし
くはｉｏ、０ｏｏ〜Ｊｏｏ、ｏｏｏのものが有効である
。これらのポリウレタンについては特願昭Ｉ参−２ｈｅ
ｒｏ号に記載されている。Effective molecular weights of these are j, 000, 100,000, preferably io, 0oo to Joo, ooo. Regarding these polyurethanes, see the patent application No. 1, No. 2he.
It is described in No. ro.
更に、ポリインシアネートとしては、λ、参−トリレン
シイツクアネート、ｌ、１−へ中サメチレ、イジイソシ
アネート、トリイソシアネート（たとえば、日本ポリウ
レタン工業■製造の“コロネ−）Ｌ″）などが使用でき
る。Further, as the polyincyanate, λ, trilene thiocyanate, 1, 1-trilene diisocyanate, diisocyanate, triisocyanate (for example, "Coronet L" manufactured by Nippon Polyurethane Industries, Ltd.), etc. can be used. .
本発明のパック層のバインダーの組成比は、バインダー
ｉｏｏ重量部に対して、繊維素系樹脂がＪ０〜１０重量
部（特に好ましくは３０〜ｔｏ重量部）、熱可履性ポリ
ウレタンエラストマーがコ０〜ｊ０重量部（特に好まし
くは７０−参〇重量部）、ポリイソシアネートが１０〜
１０重量部（特に好ましくは２０〜参〇重量部）が好ま
しい。The composition ratio of the binder in the pack layer of the present invention is such that the cellulose resin is 0 to 10 parts by weight (particularly preferably 30 to 10 parts by weight) and the thermoplastic polyurethane elastomer is 0 to 10 parts by weight based on 10 parts by weight of the binder. ~j0 parts by weight (particularly preferably 70-60 parts by weight), polyisocyanate is 10~
It is preferably 10 parts by weight (particularly preferably 20 to 10 parts by weight).
本発明のパック層の厚さはその中に含有される添加剤に
よって決定されるが、通常０．Ｊ−／。The thickness of the pack layer of the present invention is determined by the additives contained therein, but is usually 0. J-/.
！μ、特にｏ、ｚ−ｉ、ｏμである。! μ, especially o, zi, oμ.
以下に実施例を示すが、実施例中「部」は「重量部」を
示す。Examples are shown below, and "parts" in the examples indicate "parts by weight."
実施例 に
トロセルロース ＪＩ１部ポリフレ
クン商品名［ニツポラン
コ１０／Ｊ日本ポリウレタン＃製
造） コｏ＠
ボリイソシアネｉト（商品名「コロ
ネートＬ」日本ポリウレタン■製
造） 参！部Ｃａ ＣＯｓ粉
末（商品名「ホモカルＤ」白石工業＠製造、ｉｌｌ径０
．０７ｐ）Ｊｕｎ＠ステアリン酸
ｊ部メチルエチルケトｙ ｏｒ
Ｏ部上記組成物をボールイル中で充分に混線分散して塗
料を作夛、これを表面に磁気記録層を有する磁気記鍮テ
ープの裏面に塗布し、乾燥後０．１〜／、Ｊμの厚さの
パック層を形成した。Example Torocellulose JI Part 1 Polyflexun Product name [Nituporanco 10/J Japan Polyurethane #Manufactured by Coo @ Polyisocyanate (Product name ``Coronate L'' manufactured by Japan Polyurethane ■) See! Part Ca COs powder (product name “Homocal D” manufactured by Shiraishi Kogyo, ill diameter 0
．． 07p) Jun@stearic acid
j part methyl ethyl keto y or
Part O: The above composition is thoroughly cross-dispersed in a ball mill to prepare a paint, which is applied to the back side of a magnetic brass tape having a magnetic recording layer on the surface, and after drying, the thickness is 0.1 to Jμ. A pack layer was formed.
実施例 雪
ニトロセルロース Ｊｊ部ポリクレ
タ／（商品名「ニラボラン
Ｊｓａｌ」日本ボリクレタンｌｌｌｌ１１１造）
２ｏ部Ｉリイソシアネート（商
品名「コロ
ネートＬ」日本ポリウレタン■製
造） −３部ＣａＣＯ５粉末
（商品名「ホ篭カルＤ」白石工業■製造、、粒径０．０
７μ）２ＳＯＷエルカ酸
ｊ部メチルエチルケトン ａｇｏ部上
記パック層の組成物を使用する以外実施例１と同様にし
て磁気テープを得た。Example Snow nitrocellulose Jj part Polycreta/(Product name "Niboran Jsal" made by Nippon Polycretan 111)
2 parts I lysocyanate (trade name "Coronate L" manufactured by Nippon Polyurethane) - 3 parts CaCO5 powder (trade name "Hoko Cal D" manufactured by Shiraishi Kogyo ■, particle size 0.0
7μ) 2SOW erucic acid
Part j: Methyl ethyl ketone Part A: A magnetic tape was obtained in the same manner as in Example 1, except that the composition of the pack layer described above was used.
Claims (1)
該パック層は、（１）粒径０．ｊμ以下の無機質粉末、
（２）炭素数／Ｊ以上の脂肪酸又は脂肪酸エステル、及
び（３）バインダーとして、繊維素系樹脂、熱可麿性ポ
リウレタンエラストマー及びポリイソシアネートを含有
することを特徴とする磁気記鍮媒体。having a magnetic layer and a pack layer on opposite sides of the support,
The pack layer has (1) a particle size of 0. Inorganic powder below jμ,
A magnetic recording medium characterized by containing (2) a fatty acid or fatty acid ester having carbon number/J or more, and (3) a cellulose resin, a thermoplastic polyurethane elastomer, and a polyisocyanate as a binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57126081A JPS5837840A (en) | 1982-07-20 | 1982-07-20 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57126081A JPS5837840A (en) | 1982-07-20 | 1982-07-20 | Magnetic recording medium |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP168680A Division JPS5698719A (en) | 1980-01-10 | 1980-01-10 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5837840A true JPS5837840A (en) | 1983-03-05 |
Family
ID=14926132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57126081A Pending JPS5837840A (en) | 1982-07-20 | 1982-07-20 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5837840A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6079522A (en) * | 1983-10-04 | 1985-05-07 | Sony Corp | Magnetic recording medium |
| JPS61180927A (en) * | 1985-02-06 | 1986-08-13 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| JPS6262425A (en) * | 1985-09-12 | 1987-03-19 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
-
1982
- 1982-07-20 JP JP57126081A patent/JPS5837840A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6079522A (en) * | 1983-10-04 | 1985-05-07 | Sony Corp | Magnetic recording medium |
| JPH0533448B2 (en) * | 1983-10-04 | 1993-05-19 | Sony Corp | |
| JPS61180927A (en) * | 1985-02-06 | 1986-08-13 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| JPH0535483B2 (en) * | 1985-02-06 | 1993-05-26 | Matsushita Electric Ind Co Ltd | |
| JPS6262425A (en) * | 1985-09-12 | 1987-03-19 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
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