JPS5928231A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5928231A JPS5928231A JP57137333A JP13733382A JPS5928231A JP S5928231 A JPS5928231 A JP S5928231A JP 57137333 A JP57137333 A JP 57137333A JP 13733382 A JP13733382 A JP 13733382A JP S5928231 A JPS5928231 A JP S5928231A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- powder
- tio
- magnetic tape
- al2o3
- 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
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000006247 magnetic powder Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 abstract description 23
- 239000002245 particle Substances 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- 229920006267 polyester film Polymers 0.000 abstract description 2
- 239000004576 sand Substances 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract 2
- 239000006185 dispersion Substances 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 description 7
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/708—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by addition of non-magnetic particles to the layer
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気記録媒体に係り、磁性層中に、少なくとも
Ａ Ｌ２０３又はＯｒ ｔ ０３と、ＴｉＯとを含ませ
ておくことにより、特にスチル特性の向上したものとな
る磁気記録媒体を提供することを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium, and includes a magnetic recording medium with particularly improved still characteristics by containing at least A L203 or Or t 03 and TiO in a magnetic layer. The purpose is to provide recording media.
磁気テープ等の磁気記録媒体に要求される耐摩耗性の一
つの特性として、メチル特性がある。例えば非常に速い
相対速度で回転するドラムについた２個のヘッドが、ス
チル再生時には磁気テープの同一個所を激しく摺動する
ものとなるので、磁気テープの耐摩耗性が悪いと磁性層
塗膜が削れ、磁気ヘッドのギャップづまりを引き起こす
ものとなる。One of the characteristics of wear resistance required of magnetic recording media such as magnetic tapes is methyl characteristics. For example, two heads attached to a drum that rotate at very high relative speeds slide violently on the same part of the magnetic tape during still playback, so if the abrasion resistance of the magnetic tape is poor, the magnetic layer coating may deteriorate. This results in abrasion and clogging of the gap in the magnetic head.
そこで、このような欠点を改善する為に、Ａム０３．０
ｒ２０３等磁性粉より硬質の非磁性粉を磁性層中に含ま
せることが提案されている。Therefore, in order to improve such shortcomings, AM03.0
It has been proposed that a non-magnetic powder harder than r203 magnetic powder be included in the magnetic layer.
しかしながら、このような方法では、磁気テープの耐摩
耗性を向上させることができるものの、磁気ヘッド自体
の摩耗特性において摩耗量が大きくなる欠点が逆に生じ
、磁気テープと磁気ヘッド両方の摩耗特性の向上を図り
ながらメチル特性の向上を図るといったことはできてい
ない。However, although this method can improve the wear resistance of the magnetic tape, it has the disadvantage of increasing the amount of wear due to the wear characteristics of the magnetic head itself, and the wear characteristics of both the magnetic tape and the magnetic head are While trying to improve the methyl properties, it has not been possible to improve them.
本発明者は、磁性層中に、Ａ ｔ２０３又は０ｒ２０３
と、ＴｉＯとを併用して混入しておけば、両者の相乗効
果によって、磁気ヘッド及び磁気テープの摩耗特性が共
に良好で、メチル特性も顕著に向上したものとなり、理
想的な磁気記録媒体ができることを見い出したのである
。さらに、ＴｉＯが磁性層中に添加されていると、磁気
テープの表面電気抵抗が小さくなり、磁気ヘッド等との
摩擦による静電気の半減期も大巾に短かくなり、帯電防
止効果にすぐれ、磁気テープの巻き形状が改善されたも
のとなり、又、８０００〜９０００Ａの波長の光に対す
る透過率も小さなものとなることを見い出した。The present inventor has discovered that A t203 or 0r203 is present in the magnetic layer.
If TiO and TiO are mixed together, the synergistic effect of the two will improve the wear characteristics of both the magnetic head and the magnetic tape, and the methyl properties will also be significantly improved, creating an ideal magnetic recording medium. I discovered what I could do. Furthermore, when TiO is added to the magnetic layer, the surface electrical resistance of the magnetic tape decreases, and the half-life of static electricity caused by friction with the magnetic head etc. is greatly shortened, resulting in an excellent antistatic effect and magnetic It has been found that the winding shape of the tape is improved and the transmittance for light having a wavelength of 8000 to 9000 A is also reduced.
又、これら磁性層中に加えるＴｉＯ等の非磁性粉の粒径
が大きくなる程、メチル特性が向上するものとなるが、
磁気ヘッドの摩耗特性が悪くなり、電磁変換特性が低下
する傾向があり、逆に粒径が小さくなる程、スチル特性
が悪くなる傾向があるので、これらの非磁性粉はその平
均粒径が約０．０１〜５μｍ１特に望ましくは約０．０
５〜０．２μｍの範囲内のものである。Furthermore, as the particle size of the non-magnetic powder such as TiO added to these magnetic layers increases, the methyl properties improve.
The wear characteristics of the magnetic head tend to deteriorate, and the electromagnetic conversion characteristics tend to deteriorate.Conversely, the smaller the particle size, the worse the still characteristics tend to be.These non-magnetic powders have an average particle size of approximately 0.01 to 5 μm1, particularly preferably about 0.0
It is within the range of 5 to 0.2 μm.
又、ＴｉＯ等の非磁性粉の添加量は、ＴｉＯと、Ａ ｔ
２０ｓ 、Ｏｒ ２０３又はＡ ｔ２０３とＣｒ２Ｏ３
との混合物との添加比率によって磁気ヘッド、磁気テー
プの摩耗量、スチル特性が微妙に変るが、ＴｉＯは磁性
粉に対して０５〜１５重量係、Ａ ｔ２０３ 、Ｏｒ
２０３又はＡ ｔ２０ｓとＯｒ ２０３との混合物は磁
性粉に対して０．５〜１５重量係のものであることが望
ましいものとなる。Also, the amount of non-magnetic powder such as TiO added is TiO and A t
20s, Or 203 or A t203 and Cr2O3
The amount of wear on the magnetic head and magnetic tape, and the still characteristics will vary slightly depending on the addition ratio of TiO to the mixture with the magnetic powder.
It is desirable that the mixture of Or 203 or At20s and Or 203 has a weight ratio of 0.5 to 15 based on the magnetic powder.
以下、本発明に係る磁気記録媒体の具体的実施例の幾つ
かを述べる。Some specific examples of the magnetic recording medium according to the present invention will be described below.
実施例Ｉ
Ｃｏ含含有−Ｆｅ２０３１００重量部、塩化ビニル−酢
酸ビニル共重合体１０重量部、ポリウレタン樹脂１０重
量部、潤滑剤２重量部、カーボン５重量部、平均粒径が
００１〜５μｍのＴｉＯ粉１５重量部以下、平均粒径が
００１〜５μｍのＡｌ２Ｏ３粉１５重量部以下、及び適
当な溶剤を、サンドミルにて充分に混合分散させた後、
これにインシアネート系の硬化剤を所定量加え、その後
例えばポリエステルフィルム等のベースに約５μｍ厚塗
布して磁気テープを得る。Example I Co-containing - 100 parts by weight of Fe203, 10 parts by weight of vinyl chloride-vinyl acetate copolymer, 10 parts by weight of polyurethane resin, 2 parts by weight of lubricant, 5 parts by weight of carbon, TiO powder with an average particle size of 001 to 5 μm After thoroughly mixing and dispersing 15 parts by weight or less of Al2O3 powder with an average particle size of 001 to 5 μm and a suitable solvent in a sand mill,
A predetermined amount of incyanate-based curing agent is added to this, and then applied to a base such as a polyester film to a thickness of about 5 μm to obtain a magnetic tape.
このようにして得られた磁気テープを記録再生機に装着
して走行させた際の磁気ヘッドの摩耗特性について測定
すると（第１図参照）、Ａｔ２０３粉が６重量係以下の
場合にはヘッド摩耗量はＡ Ｌ２０３粉の添加量と比例
関係があるものとなり、そしてそれからさらに多（Ａｔ
２０３粉を加えてもヘッド摩耗量はほぼ一定のものとな
り、もつと多くＡｔ２０３粉を加えるとヘッド摩耗量が
大きくなるといった傾向があり、そしてこのような傾向
はＴＩＯ粉を添加することによってヘッド摩耗の少ない
ものとなることがわかる。すなわち、磁性層中にＴＩＯ
粉を添加しておくことによって、磁気ヘッドの摩耗特性
が改善されるものとなるのである。When measuring the wear characteristics of the magnetic head when the magnetic tape obtained in this way was mounted on a recording/reproducing machine and run (see Figure 1), it was found that if the At203 powder was 6% by weight or less, the head wore out. The amount is proportional to the amount of A L203 powder added, and then even more (At
Even if At203 powder is added, the amount of head wear remains almost constant, and as more At203 powder is added, the amount of head wear tends to increase. It can be seen that the That is, TIO in the magnetic layer
By adding powder, the wear characteristics of the magnetic head are improved.
又、ステル特性（スチル再生可能な耐久時間）について
同様に測定すると（第２図参照） 、ＡｔｚＯａ粉を添
加する程メチル特性は向上するものであるが、このスチ
ル特性の向上は、ＴＩＯ粉を添加することによってより
一層向上するものとなる。すなわち、Ａ ｔ２０ａ粉の
添加量を多くする程スチル特性は向上するのであるが、
ヘッド摩耗特性は悪くなるといった欠点があり、Ａｔ２
０ａ粉の添加量を比較的少なくしてヘッド摩耗特性を良
好なものとしながらもステル特性を良くすることは、Ａ
ｔ２０３粉とＴｉＯとの両者の併用によって実現できる
のである。Furthermore, when the steal properties (durability time during which still can be regenerated) are similarly measured (see Figure 2), the more AtzOa powder is added, the more the methyl properties improve, but this improvement in still properties is due to the addition of TIO powder. By adding it, the improvement will be further improved. In other words, as the amount of At20a powder added increases, the still characteristics improve.
At2 has the disadvantage of poor head wear characteristics.
A. It is possible to improve the stealth characteristics while making the head wear characteristics good by adding a relatively small amount of 0a powder.
This can be achieved by using both t203 powder and TiO in combination.
さらに、これらの磁気テープについて、その光透過率及
び表面電気抵抗（第３図及び第４図参照）を測定すると
、これらの特性はＡ ｔ２０ａの添加量によるのではな
り、ＴＩＯの添加量によってほとんど決まるものであり
、ＴＩＯ粉を加えておくことによって光透過率は一段と
小さくなり、従って光センサーによってテープ端検出を
行なうような記録再生装置で用いても、磁性層が設けら
れている部分では光透過率が極めて小さいので、テープ
端検出機構が誤作動するといった恐れはなくなり、又、
ＴＩＯ粉を加えることによって表面電気抵抗は一段と小
さくなり、磁気ヘッド、ガイドピン等との摩擦によって
発生する静電気が磁気テープに帯電しにくいものとなり
、ゴミやホコリの付着しにくいものともなる。Furthermore, when we measured the optical transmittance and surface electrical resistance (see Figures 3 and 4) of these magnetic tapes, we found that these characteristics did not depend on the amount of At20a added, but were almost entirely dependent on the amount of TIO added. By adding TIO powder, the light transmittance is further reduced. Therefore, even when used in a recording/reproducing device that detects the edge of a tape using an optical sensor, light cannot be detected in the area where the magnetic layer is provided. Since the transmittance is extremely low, there is no fear that the tape end detection mechanism will malfunction, and
By adding TIO powder, the surface electrical resistance is further reduced, and the magnetic tape is less likely to be charged with static electricity generated by friction with the magnetic head, guide pin, etc., and dirt and dust are less likely to adhere to it.
実施例２．３
実施例１において、Ａｔ５Ｏｓ粉の代りに、同様な粒径
の０ｒ２０３又は０ｒ２０３とＡ ｔ２０３との混合物
を用いて、実施例１と同様にして磁気テープを得る。Example 2.3 A magnetic tape is obtained in the same manner as in Example 1, except that in place of the At5Os powder, Or203 or a mixture of Or203 and At203 having a similar particle size is used.
このような磁気テープにおいても、磁気ヘッド摩耗特性
及びスチル特性は、前記実施例と同様なものとなり、す
なわちＴＩＯ粉とＯｒ ＊ Ｏａ粉、又はＴＩＯ粉とＡ
ｔ２０ｓとＯｒ、Ｏ，粉とが磁性層中に含まれている
と、磁気ヘッド摩耗特性及びスチル特性といった相反す
る特性が共に向上するものとなり、又、光透過率及び表
面電気抵抗の特性も共に向上したものとなる。Even in such a magnetic tape, the magnetic head wear characteristics and still characteristics are the same as those in the above embodiments, that is, TIO powder and Or*Oa powder, or TIO powder and A
When t20s, Or, O, and powder are contained in the magnetic layer, contradictory properties such as magnetic head wear characteristics and still characteristics are both improved, and the characteristics of light transmittance and surface electrical resistance are also improved. It will be improved.
−４−述の如く、本発明に係る磁気記録媒体は、磁性層
中に、少なくともＡ ｔ２０３又はＣｒ２Ｏ３と、Ｔｉ
Ｏとを含むものであるので、このような磁気記録媒体は
磁気ヘッドの摩耗特性が向上するものとなると共にスチ
ル特性も向上するものとガリ、すなわち磁気記録媒体の
耐摩耗性と磁気ヘッドの耐摩耗性といった相反する特性
の向上が共に図れるようになり、父、光透過率も改善さ
れ、さらには表面電気抵抗も改善され、巻き形状が改善
されたものとなる等の特長を有する。-4- As mentioned above, the magnetic recording medium according to the present invention contains at least At203 or Cr2O3 and Ti in the magnetic layer.
Since it contains O, such a magnetic recording medium improves the abrasion characteristics of the magnetic head and also improves the still characteristics. It is now possible to improve these contradictory properties at the same time, and it has features such as improved light transmittance, improved surface electrical resistance, and improved winding shape.
第１図〜第４図は、本発明に係る磁気記録媒体のヘッド
摩耗特性、スチル特性、光透過率及び表面電気抵抗の特
性を示すグラフである。
１６７−
−＠ ざ
Ｃ３
獣 煩 型 ＆＋υ1 to 4 are graphs showing head wear characteristics, still characteristics, light transmittance, and surface electrical resistance characteristics of the magnetic recording medium according to the present invention. 167- -@zaC3 beast trouble type &+υ
Claims (1)
３と、ＴｉＯとを含むことを特徴とする磁気記録媒体。 ■ Ａｔ２０３、Ｃｒ２Ｏ３、ＴＩＯは、磁性粉に対し
て各０．５〜１５重量係の添加量のものである特許請求
の範囲第１項記載の磁気記録媒体。[Claims] ■ At least At20:l or 0r20 in the magnetic layer.
3 and TiO. (2) The magnetic recording medium according to claim 1, wherein At203, Cr2O3, and TIO are each added in an amount of 0.5 to 15% by weight relative to the magnetic powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57137333A JPS5928231A (en) | 1982-08-09 | 1982-08-09 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57137333A JPS5928231A (en) | 1982-08-09 | 1982-08-09 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5928231A true JPS5928231A (en) | 1984-02-14 |
| JPS6222175B2 JPS6222175B2 (en) | 1987-05-16 |
Family
ID=15196204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57137333A Granted JPS5928231A (en) | 1982-08-09 | 1982-08-09 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5928231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03268201A (en) * | 1990-11-26 | 1991-11-28 | Hitachi Ltd | Magnetic disk device |
-
1982
- 1982-08-09 JP JP57137333A patent/JPS5928231A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03268201A (en) * | 1990-11-26 | 1991-11-28 | Hitachi Ltd | Magnetic disk device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6222175B2 (en) | 1987-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6057530A (en) | Magnetic recording medium | |
| JPS5928232A (en) | Magnetic recording medium | |
| JPS5928231A (en) | Magnetic recording medium | |
| JPS6238525A (en) | Magnetic recording medium | |
| JPS61919A (en) | Magnetic recording medium | |
| JPH0142050B2 (en) | ||
| KR940006847B1 (en) | Magnetic recording medium | |
| JPS5928241A (en) | Magnetic recording medium | |
| JPS6238528A (en) | Magnetic recording medium | |
| JP2695647B2 (en) | Magnetic recording media | |
| KR930001886B1 (en) | Magnetic recording media | |
| JPS6238534A (en) | Magnetic recording medium | |
| JPH03100917A (en) | Magnetic recording medium | |
| JP2600796B2 (en) | Magnetic recording media | |
| JPH0619830B2 (en) | Magnetic recording medium | |
| JP2568753B2 (en) | Magnetic recording media | |
| JPS6346621A (en) | Magnetic recording medium | |
| JPS5930240A (en) | Magnetic recording medium | |
| JP2869074B2 (en) | Magnetic recording media | |
| JPS5928229A (en) | Magnetic recording medium | |
| JPS5928234A (en) | Magnetic recording medium | |
| JPS6378334A (en) | Magnetic recording medium | |
| JPS6238536A (en) | Magnetic recording medium | |
| JPS6222233A (en) | Magnetic recording medium | |
| JPH01248318A (en) | Magnetic recording medium |