JPS6080124A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6080124A JPS6080124A JP18822283A JP18822283A JPS6080124A JP S6080124 A JPS6080124 A JP S6080124A JP 18822283 A JP18822283 A JP 18822283A JP 18822283 A JP18822283 A JP 18822283A JP S6080124 A JPS6080124 A JP S6080124A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic recording
- layer
- magnetic
- back layer
- 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
- Paints Or Removers (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、磁気記録媒体に関し、特に、磁気テープのバ
ック層のけずれ等を減少させ、走行耐久性を改良した磁
気記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic recording medium, and more particularly to a magnetic recording medium in which scratching of the back layer of a magnetic tape is reduced and running durability is improved.
（従来技術）
従平、バック層のけずれ、走行耐久性をコントロールす
る方法として、バック層に粗粒子と微粒子の粉体を用い
る方法（特開昭３７−３３１２ｊｔ号）バック層に潤滑
剤を混入させる方法（特開昭ｊｔｔ−３７１ｕＯ号）
パック１−に下塗層を設ける方法（特開昭５７−１２３
！ｔ、３２号）
などがある。(Prior art) Kouhei proposed a method of using coarse and fine powder in the back layer as a method to control the shearing of the back layer and running durability (Japanese Patent Application Laid-Open No. 37-3312JT). Method of mixing (Japanese Patent Application Laid-Open No. 1986-123) Method of providing an undercoat layer on Pack 1- (Japanese Patent Application Laid-Open No. 57-123
! t, No. 32).
しかし、これらの方法は、塗布液の分散が困難であり又
、温度の影響を受け易く、製造コストも高い等の難点が
ある。However, these methods have drawbacks such as difficulty in dispersing the coating liquid, being susceptible to temperature effects, and high manufacturing costs.
（発明の目的）
それ故に本発明の目的は、バック層のけずれのない走行
耐久性の良好な磁気記録媒体を提供することにある。本
発明の別の目的は、温度の影響を受けず、製造コストの
低い磁気記録媒体を提供することにある。(Object of the Invention) Therefore, an object of the present invention is to provide a magnetic recording medium with good running durability and free from scratching of the back layer. Another object of the present invention is to provide a magnetic recording medium that is not affected by temperature and has low manufacturing costs.
（発明の構成）
本発明の上記の目的は、非磁性支持体の一面に磁性層を
設け、他面に厚さ２μｍ以下の／＜ツク層を設け、かつ
そのバック層中にｏ、ｒＢ、１以下のガラス粉を含有さ
せることによって達成される。(Structure of the Invention) The above-mentioned object of the present invention is to provide a magnetic layer on one side of a non-magnetic support, provide a /< layer with a thickness of 2 μm or less on the other side, and provide o, rB, This is achieved by containing one or less glass powders.
バック層の厚さは２４ｍ以下が好ましく、より好ましく
は、Ｏ，コー／、１８ｍであり、更に好ましくは、ｏ、
ａ〜／、５８ｍである。The thickness of the back layer is preferably 24 m or less, more preferably 18 m, even more preferably O,
a~/, 58m.
バック層の厚さは、２μｍをこえすると混入させたガラ
ス粉の効果が発揮されない。テープ全厚も厚くなるため
、長時間録音テープに適さない。If the thickness of the backing layer exceeds 2 μm, the effect of the mixed glass powder will not be exhibited. Since the overall thickness of the tape is also thicker, it is not suitable for long-term recording tapes.
又、薄すぎるとけずれ等が生じ耐久性に問題が生じてく
る。In addition, if it is too thin, it may scratch or the like, resulting in problems with durability.
バック層に用いるガラス粉は、塗布液の分散工程に使用
する分散機のメディアとしてのガラスピーズが微細にけ
ずれたものでも良いし、又、別途ガラス粉を添加しても
良い。The glass powder used for the back layer may be finely chipped glass beads used as the media of a dispersion machine used in the dispersion process of the coating liquid, or glass powder may be added separately.
ガラスの組成については、ガラスピーズに関してｌ陛公
昭ｊニー３１１３／号、％開昭３３−１０．２３２部号
などに記載されている。Regarding the composition of glass, glass beads are described in Japanese Patent No. 3113/2013, Part No. 10.232 of 1973, etc.
本発明におけるガラス粉のサイズは、長径方向の長さで
Ｏ，Ｓμｍ以下が好ましい。より好ましくはｏ、ｏｒ
〜ｏ、ｓｉｔｍ、特に００Ｏｊ〜０゜３μｍである。ｏ
、ｒμｍをこえるサイズのガラス粉がバック層に存在す
るとＶＴＲ走行系を摩耗させたシ、又、磁性面へガラス
粉の凹凸が写り、ドロップアウトの原因になりやすい。The size of the glass powder in the present invention is preferably 0.S μm or less in length in the major axis direction. More preferably o, or
˜o, sitm, especially 00Oj˜0°3 μm. o
If glass powder with a size exceeding .rpm exists in the back layer, it will wear out the VTR running system, and the unevenness of the glass powder will be reflected on the magnetic surface, easily causing dropouts.
０１１μｍ以下であれば、前記詐害はなく、逆にバック
層のけずれがなくなり、耐久性が大幅に向上するととが
わかった。It has been found that if the thickness is 0.011 μm or less, the above-mentioned deterioration does not occur, and on the contrary, the back layer does not come off and the durability is significantly improved.
本発明のバック層に使われる結合剤及び、充填剤につい
ては、通常のバインダー、及び無機質粉末が使用できる
。具体的には、特開昭ｊｔｌ−３７ｇｐｏ号に記載され
ている。As for the binder and filler used in the back layer of the present invention, ordinary binders and inorganic powders can be used. Specifically, it is described in Japanese Patent Application Laid-open No. Sho JTL-37GPO.
磁性層における磁性塗料及びその調製方法並びに製造工
程については特開昭！λ−１０１１０≠号に開示されて
いる。Regarding the magnetic paint in the magnetic layer, its preparation method, and manufacturing process, please refer to JP-A-Sho! It is disclosed in λ-10110≠ issue.
本発明の磁気記録媒体は、走行耐久性が良好でバック層
のけずれのなく、シかも、この効果は、温度に影響され
ることがなく、コストも低い。The magnetic recording medium of the present invention has good running durability and the back layer does not disintegrate. This effect is not affected by temperature and the cost is low.
次に本発明の実施例について説明する。Next, examples of the present invention will be described.
実施例中、「部」は「重量部」を示す。In the examples, "parts" indicate "parts by weight."
実施例
１μμｍの厚さのポリエステルベースの一面に上記塗布
液を塗布、乾燥しカレンダー処理をして３μｍの磁性層
を設けた。Example The above coating solution was coated on one side of a polyester base having a thickness of 1 μm, dried and calendered to form a magnetic layer of 3 μm.
次にポリエステルベースの他面にバック層を設けた。Next, a back layer was provided on the other side of the polyester base.
バック層は、下記組成をサンドグライダ−に入れ、下記
組成のガラスピーズを２００部加えて、蓼時間分散し、
所定のフィルターを通した。得られた分散液にポリイソ
シアネート（３モルの２゜μ−トリレンジイソシアネー
ト化合物と７モルのトリメチロールプロパンの反応生成
物）の７５Ｗｔ（＋酢酸エチル溶液ｊＯ部を添加して塗
布液を調製した。次にこの塗布液を塗布乾燥して厚さ１
μｍのバック層とした。For the back layer, put the following composition into a sand glider, add 200 parts of glass beads with the following composition, and disperse for a while.
Passed through a specified filter. A coating solution was prepared by adding 75 Wt (+ JO parts of an ethyl acetate solution) of polyisocyanate (reaction product of 3 moles of 2° μ-tolylene diisocyanate compound and 7 moles of trimethylolpropane) to the obtained dispersion. Next, apply this coating solution and dry it to a thickness of 1
The back layer had a thickness of μm.
〈ガラスピーズ組成〉
パック層分散液のろ過するのにフィルターのサイズ及び
段数を変えて、ガラスピーズの破砕されたガラス粉のバ
ック層に混入されるサイズを調製した。<Glass pea composition> The size and number of filters used to filter the pack layer dispersion were varied to adjust the size of the glass peas to be mixed into the back layer of crushed glass powder.
このようにしてバック層へ混入したガラス粉のサイズを
調製した種々の磁気テープを作成し、それぞれ／／、Ｌ
インチ巾にスリットした後ＶＨ８型ビデオレコーダー（
松下ＮＹ−ｔ３θＯ）に装架して２つの環境条件で（λ
ｏ ’ｃ、ｒｏｔｇＢＨ及び弘ｏ ’Ｃ，ｆＯ４ＲＨ）
ｌｏｏパス走行させて、その後、バック層のけずれ損
傷状態を調べた。更にビクター社製ドロップアウトカウ
ンターＶＤ−３Ｄを用い、−分間当りのｌＳμＳのドロ
ップアウト数を調べた。In this way, various magnetic tapes with different sizes of glass powder mixed into the back layer were prepared, and
After slitting to inch width, VH8 type video recorder (
Matsushita NY-t3θO) under two environmental conditions (λ
o'c, rotgBH and Hiroo'C, fO4RH)
After running the loop pass, the state of damage caused by shearing of the back layer was examined. Furthermore, the number of lSμS dropouts per minute was determined using a dropout counter VD-3D manufactured by Victor.
この結果は第１図に示した。The results are shown in FIG.
第１図から明らかなどと＜、’、’！’ｍ以下のガラス
粉の混入したバック層を持つ磁気テープは、ドロップア
ウトも少なく、走行耐久性が良好である。特にｕｏｏｃ
での効果は顕著であった。It is clear from Figure 1 that <,','! A magnetic tape having a back layer mixed with glass powder of less than 100 mm has fewer dropouts and has good running durability. Especially uooc
The effect was remarkable.
【図面の簡単な説明】
第１図はバック層にガラス粉の混入の有無及び粒子サイ
ズによりバック層けずれ及びドロップアウト数に及ばず
影響を示した図である。
第１図においてｘｌ、Ｘ２％）’１％ ｙ２の曲線は以
下の条件においてめた曲線でおる。
第１図のバック層のけずれは下記Ａ−Ｄの評価に基づく
。
バック層けずれの評価[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a diagram showing the influence of the presence or absence of glass powder mixed in the back layer and particle size on back layer dislocation and the number of dropouts. In FIG. 1, the curve xl, X2%)'1%y2 is a curve obtained under the following conditions. The deviation of the back layer shown in FIG. 1 is based on the following evaluations A to D. Evaluation of back layer shearing
Claims (1)
を設けた磁気記録媒体において、該バック層の厚さが２
μｍ以下で、かつパック層中に、θ。 ｊＢＩＨ以下のガラス粉を含有することを特徴とする磁
気記録媒体。[Claims] A magnetic recording medium in which a magnetic layer 16 is provided on one side of a non-magnetic support and a back layer is provided on the other side, the back layer having a thickness of 2.
μm or less and in the packed layer, θ. A magnetic recording medium characterized by containing glass powder having a particle diameter of less than jBIH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18822283A JPS6080124A (en) | 1983-10-07 | 1983-10-07 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18822283A JPS6080124A (en) | 1983-10-07 | 1983-10-07 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6080124A true JPS6080124A (en) | 1985-05-08 |
| JPH0481258B2 JPH0481258B2 (en) | 1992-12-22 |
Family
ID=16219904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18822283A Granted JPS6080124A (en) | 1983-10-07 | 1983-10-07 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6080124A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4974909A (en) * | 1972-10-13 | 1974-07-19 | ||
| JPS57152539A (en) * | 1981-03-18 | 1982-09-20 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS57208635A (en) * | 1981-06-19 | 1982-12-21 | Tdk Corp | Magnetic recording medium |
| JPS5841420A (en) * | 1981-09-03 | 1983-03-10 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS58161135A (en) * | 1982-03-19 | 1983-09-24 | Fuji Photo Film Co Ltd | Magnetic recording medium |
-
1983
- 1983-10-07 JP JP18822283A patent/JPS6080124A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4974909A (en) * | 1972-10-13 | 1974-07-19 | ||
| JPS57152539A (en) * | 1981-03-18 | 1982-09-20 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS57208635A (en) * | 1981-06-19 | 1982-12-21 | Tdk Corp | Magnetic recording medium |
| JPS5841420A (en) * | 1981-09-03 | 1983-03-10 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS58161135A (en) * | 1982-03-19 | 1983-09-24 | Fuji Photo Film Co Ltd | Magnetic recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0481258B2 (en) | 1992-12-22 |
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