JPS5933622A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5933622A JPS5933622A JP57141396A JP14139682A JPS5933622A JP S5933622 A JPS5933622 A JP S5933622A JP 57141396 A JP57141396 A JP 57141396A JP 14139682 A JP14139682 A JP 14139682A JP S5933622 A JPS5933622 A JP S5933622A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic layer
- oleic acid
- lubricants
- acid
- 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
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 16
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 16
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 16
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000005642 Oleic acid Substances 0.000 claims abstract description 16
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 16
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 16
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 13
- 229930195729 fatty acid Natural products 0.000 claims abstract description 13
- 239000000194 fatty acid Substances 0.000 claims abstract description 13
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 13
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 12
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 10
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 6
- 239000006247 magnetic powder Substances 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 235000021355 Stearic acid Nutrition 0.000 description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 9
- 239000008117 stearic acid Substances 0.000 description 9
- 229940057995 liquid paraffin Drugs 0.000 description 6
- PRAKJMSDJKAYCZ-UHFFFAOYSA-N squalane Chemical compound CC(C)CCCC(C)CCCC(C)CCCCC(C)CCCC(C)CCCC(C)C PRAKJMSDJKAYCZ-UHFFFAOYSA-N 0.000 description 6
- -1 aliphatic alcohols Chemical class 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- YYGNTYWPHWGJRM-UHFFFAOYSA-N (6E,10E,14E,18E)-2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene Chemical compound CC(C)=CCCC(C)=CCCC(C)=CCCC=C(C)CCC=C(C)CCC=C(C)C YYGNTYWPHWGJRM-UHFFFAOYSA-N 0.000 description 2
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 2
- BHEOSNUKNHRBNM-UHFFFAOYSA-N Tetramethylsqualene Natural products CC(=C)C(C)CCC(=C)C(C)CCC(C)=CCCC=C(C)CCC(C)C(=C)CCC(C)C(C)=C BHEOSNUKNHRBNM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- JXTPJDDICSTXJX-UHFFFAOYSA-N n-Triacontane Natural products CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC JXTPJDDICSTXJX-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000003441 saturated fatty acids Nutrition 0.000 description 2
- 150000004671 saturated fatty acids Chemical class 0.000 description 2
- 229940032094 squalane Drugs 0.000 description 2
- 229940031439 squalene Drugs 0.000 description 2
- TUHBEKDERLKLEC-UHFFFAOYSA-N squalene Natural products CC(=CCCC(=CCCC(=CCCC=C(/C)CCC=C(/C)CC=C(C)C)C)C)C TUHBEKDERLKLEC-UHFFFAOYSA-N 0.000 description 2
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Glycerol trioctadecanoate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 239000004909 Moisturizer Substances 0.000 description 1
- 235000021360 Myristic acid Nutrition 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000001333 moisturizer Effects 0.000 description 1
- 229940043348 myristyl alcohol Drugs 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000004711 α-olefin Substances 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
- G11B5/71—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 the lubricant
Landscapes
- Lubricants (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は磁気記録媒体に関し、その目的とすると（一
ろは耐久性に愛れた磁気記録媒体を提供することにある
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium, and its purpose is to provide a magnetic recording medium that is highly durable.
一般に、ボリ〕ースフールフイルノ・などの基体上に磁
性粉末、結合剤樹脂、有機溶剤およびその他の必要成分
からｔＩる磁性塗料を塗着してつくられる磁気記録媒体
は、記録再生時に磁気ヘッドおよびバノドイ「どと激し
く摺接ｒるため磁性層が摩耗され易く、磁性層の摩耗が
少なくて耐久性に優れたものが要求される。In general, magnetic recording media are made by coating a magnetic paint made of magnetic powder, binder resin, organic solvent, and other necessary ingredients on a substrate such as a material such as a material that is magnetic during recording and reproduction. The magnetic layer is easily worn out due to the violent sliding contact between the head and the magnetic head, so a magnetic layer that exhibits less wear and excellent durability is required.
このため磁性層の耐摩耗性を改善する一方策として磁性
層中に種々の潤滑剤を混入することが行なわれており、
たとえば流動パラフィンとステアリン酸とを磁性層中に
混入したものが提案されている。For this reason, various lubricants are mixed into the magnetic layer as a way to improve the wear resistance of the magnetic layer.
For example, a magnetic layer containing liquid paraffin and stearic acid has been proposed.
ところがこれらの流動パラフィンとステアリン酸との混
入によって耐摩耗性はだしか｛こ改善されるものの未だ
充分ではない。However, although the abrasion resistance is improved to some extent by mixing these liquid paraffins and stearic acid, it is still not sufficient.
この発明者らはかかる現状に鑑み種々検討を行なった結
果、既に、オレイン酸とステアリン酸を併用するか、あ
るいはオレイン酸と流動パラフィンを併用して磁性層中
に含有させると前記従来のものより耐摩耗性が改善され
ることを見いだしたが、いまひとつ充分に満足できるも
のではなく、そこで、さらに検討を重ねた結果、］レイ
ン酸と、高級脂肪酸または高級脂肪族アルコールと、炭
化水素系潤滑剤とを併用して磁性層中に含有させると磁
性層の耐摩耗性が充分に向上されることを見いだし、こ
の発明をなすに至った，。The inventors have conducted various studies in view of the current situation, and have already found that using a combination of oleic acid and stearic acid, or a combination of oleic acid and liquid paraffin and incorporating them into the magnetic layer is superior to the conventional method. Although it was found that the wear resistance was improved, it was still not completely satisfactory, so as a result of further investigation,] leic acid, higher fatty acid or higher aliphatic alcohol, and hydrocarbon-based lubricant They have discovered that the abrasion resistance of the magnetic layer can be sufficiently improved by incorporating it in the magnetic layer in combination with the above, and have thus arrived at the present invention.
この発明において使用されるオレイン酸は、炭素数が１
８の油状の不飽和脂肪酸で、ドれたＩ１九’ｌ滑能を有
し、特に磁性層が磁気ヘッドと摺接する際にはその優れ
た潤滑機能が充分に発揮されて磁性層の耐摩耗性が充分
に向トされる３、士だ、高級脂肪酸または高級脂肪族ア
ルコールおよび炭化水素系潤滑剤とともに併用されると
これらとのなじみもよく、これら三者の潤滑機能が相乗
的に作用して磁性層の耐摩耗性が一段と向上される。The oleic acid used in this invention has 1 carbon number.
It is an oily unsaturated fatty acid of No. 8, which has excellent lubricating ability, and its excellent lubricating function is fully demonstrated especially when the magnetic layer is in sliding contact with the magnetic head, improving the wear resistance of the magnetic layer. 3. When used in combination with hydroxide, higher fatty acids or higher aliphatic alcohols, and hydrocarbon-based lubricants, the lubricating functions of these three act synergistically. This further improves the wear resistance of the magnetic layer.
この発明に１３いてｊレイン階と併用される高級脂肪酸
は、潤滑効果に浸れる炭素数１２以上の高級飽和脂肪酸
が好ましく使用され、このような高級飽和脂肪酸として
は、たとえば、ミリスチン酸、パルミチン酸、ステアリ
ン酸などが挙げられる。The higher fatty acids used in combination with 13 and 13 in this invention are preferably higher saturated fatty acids having 12 or more carbon atoms that have a lubricating effect. Examples of such higher saturated fatty acids include myristic acid and palmitic acid. , stearic acid, etc.
また、脂肪族アルコールとしては潤滑効果に優れる炭麦
数１２以上のものが好適なもの表して使用され、具体例
としては、たとえばステアリンアルコール、ラウリルア
ルコール、ミリスチルアルコール、七チルアルコールな
どが挙げられる。Further, as the aliphatic alcohol, those having an excellent lubricating effect and having a charcoal number of 12 or more are preferably used, and specific examples thereof include stearin alcohol, lauryl alcohol, myristyl alcohol, and heptyl alcohol.
また、前記のオレイン酸および高級脂肪酸または高級脂
肪族アルコールとともに併用される炭化水素系潤滑剤と
しては、たとえば、流動パラフィン、スクアラン、スク
アレン、合成スクアラン、合成スクアレン、αオレフイ
ン重合油等の常温で液状の液状炭化水素等が好適なもの
として使用される。この種の炭化水素系潤滑剤は擾れた
潤滑能を有し、オレイン酸及び高級脂肪酸又は高級脂肪
族アルコールと併用されるとこれら三者が相乗的に作用
して磁性層の耐摩耗性が一段と向上される。Hydrocarbon lubricants that are used in combination with oleic acid and higher fatty acids or higher aliphatic alcohols include, for example, liquid paraffin, squalane, squalene, synthetic squalane, synthetic squalene, alpha-olefin polymerized oil, etc. liquid hydrocarbons and the like are preferably used. This type of hydrocarbon lubricant has excellent lubrication ability, and when used in combination with oleic acid and higher fatty acids or higher aliphatic alcohols, these three act synergistically to improve the wear resistance of the magnetic layer. It will be further improved.
オレイン酸と、高級脂肪酸または高級脂肪族アルコール
と、炭化水素系＋１１１’ｉｉｌ剤の配合割合は、重量
比（オレイン酸対高級脂肪酸または高級脂肪族アルコー
ル対炭化水素系潤清剤）で１対５対９４〜５０対３対４
７の範囲内となるようにするのが好ましく、併用するこ
れらのＦＪ４ｍ剤がいずれもこの配合割合より少なすぎ
ると磁性層の耐摩耗性が充分に改善されず、オレイン酸
の配合割合が多すぎるとパッドとの摩擦係数が高くなり
走行が不安定となる。また、高級脂肪酸または高級脂肪
族アルコールの配合割合が多すぎると表面にブリードア
ウトしてヘッドを汚染し、出力を低下させるおそれがあ
り、炭化水素系潤滑剤の配合割合が多ずぎるとパッドに
よる耐摩耗性が低下する。The blending ratio of oleic acid, higher fatty acid or higher aliphatic alcohol, and hydrocarbon + 111'iil agent is 1:5 by weight (oleic acid to higher fatty acid or higher aliphatic alcohol to hydrocarbon moisturizer). vs. 94-50 vs. 3-4
It is preferable to keep the amount within the range of 7. If the amount of these FJ4m agents used in combination is too small than this range, the abrasion resistance of the magnetic layer will not be sufficiently improved, and the amount of oleic acid added will be too high. The coefficient of friction between the brake pad and the pad increases, making running unstable. Additionally, if the blending ratio of higher fatty acids or higher aliphatic alcohols is too high, it may bleed out onto the surface and contaminate the head, reducing output. Abrasion resistance is reduced.
このような配合割合で配合したオレイン酸と、高級脂肪
酸または高級脂肪族アルコールと、炭化水素系？４滑剤
の使用量は、これらを合計して磁性粉末に対して０．１
〜２０重景％取消囲内にするのが好ましく、少なすぎる
と所期の効果が得られず、多ずきると磁性層表面にブリ
ー ドアウド・＼ラドを汚染し、出力を低下させるおそ
れがある。Oleic acid, higher fatty acids or higher aliphatic alcohols, and hydrocarbons blended in this proportion? The total amount of 4 lubricants used is 0.1 for the magnetic powder.
It is preferable to set the amount within the range of ~20%. If it is too small, the desired effect may not be obtained, and if it is too large, it may contaminate the surface of the magnetic layer with bleed odor and reduce the output.
オレーｒン酸と、高級脂肪酸または高級脂肪族アルコー
ルと、炭化水素系潤滑剤とを磁性層中に含有させるには
、これらをノルマルへへ′ーリ゛ンなどの適当な溶剤に
溶ＷｒＹＬ，、溶解によって得られた溶液を予め形成し
た磁性層に塗布、もしくは噴霧するか、或いは磁性層を
一上記溶液中に浸漬して行なえばよく、また、これらを
磁性粉末および結合剤樹脂とともに混練して磁性層を形
成することによって含有さゼでもよい。In order to incorporate oleic acid, a higher fatty acid or a higher aliphatic alcohol, and a hydrocarbon lubricant into the magnetic layer, these are dissolved in a suitable solvent such as normal olefin, WrYL, The solution obtained by dissolution may be applied or sprayed onto a pre-formed magnetic layer, or the magnetic layer may be immersed in the above solution, or these may be kneaded with magnetic powder and binder resin. It may also be incorporated by forming a magnetic layer.
次に、この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
Ｃｔ＋含イｆｒ − Ｆｅ ２０３磁性粉朱 ２７
０重ｉ１部ＶＡＧ）１（米国ｔ１．ｃ．ｃネ（・製、
８０ 〃塩化ビニルー酢酸ビニルービ
ニルアルコール共重合体）
Ｎ１４３２Ｊ （日本ゼオン社１．ｉ１１４、 １
５重量部アクリロニトリル−ブタジェン
共重合体）
コロネートし （１１本ボリウレク １０ 〃ンニ
［業社製、三官能性低分子暇
イソシアネート化合物）
ＨＳ−５００（旭カーボン社製、 ３４ 〃カーボン
ブラック）
α−Ｆｅ２０３粉末 １１ 〃メチルイ
ソブチルケトン ４２０ 〃トルエン
４２０ 〃この組成物をボールミル中で混
合分散して磁性塗料を調製し、この磁性塗料を厚さ７５
μのポリエステルフィルム両面に乾燥１ｖが３ ／ｌと
なるように塗布、乾燥して磁性層を形成した。次いでこ
れを］レイン酸２．５爪量部、ステアリン酸２．５重置
部、流動パラフィン４５重量部、ノルマルヘキサン１０
００重量部からなる含浸溶液に短時間浸漬し、乾燥後円
板状に打ち抜いて磁気ディスクをつくった１、
実施例
実施例１における含浸溶液の組成において、ステアリン
酸に代えてステアリルアルコールを同量使用した以外は
実施例１と同様にして磁気ディスクをつくった３゜
比較例１
実施例１における含浸溶液の組成において、オレイン酸
を省き、ステアリン酸の使用量を２．５重量部から５重
量部に変更した以外は実施例１と同様にして磁気ディス
クをつくった、
比較例２
実施例１における含浸溶液の組成において、流動パラフ
ィンを省き、オレイン酸の使用量を２．５重量部から４
５重量部に変更し、さらにステアリン酸の使用量を２．
５重量部から５重量部に変更した以外は実施例１と同様
にし゛Ｃ磁気ディスクをつくった。Example Ct+Fr-Fe 203 Magnetic Powder Vermilion 27
0 weight i1 part VAG) 1 (made in the United States t1.c.c.
80 〃Vinyl chloride-vinyl acetate-vinyl alcohol copolymer) N1432J (Nippon Zeon Co., Ltd. 1.i114, 1
5 parts by weight acrylonitrile-butadiene copolymer) Coronate (11 polyurec 10) HS-500 (manufactured by Asahi Carbon Co., Ltd., 34 carbon black) α-Fe203 Powder 11 〃Methyl isobutyl ketone 420 〃Toluene
420 This composition was mixed and dispersed in a ball mill to prepare a magnetic paint, and the magnetic paint was coated with a thickness of 75 mm.
A magnetic layer was formed by coating on both sides of a μ polyester film at a dry ratio of 1 V of 3/L and drying. [Next, this was added] 2.5 parts by weight of leic acid, 2.5 parts by weight of stearic acid, 45 parts by weight of liquid paraffin, 10 parts by weight of n-hexane.
A magnetic disk was produced by dipping it in an impregnating solution of 0.00 parts by weight for a short time, drying it and punching it out into a disc shape. Comparative Example 1 A magnetic disk was produced in the same manner as in Example 1 except that oleic acid was omitted from the composition of the impregnating solution in Example 1, and the amount of stearic acid used was changed from 2.5 parts by weight to 5 parts by weight. Comparative Example 2 In the composition of the impregnating solution in Example 1, liquid paraffin was omitted, and the amount of oleic acid used was changed from 2.5 parts by weight to 4 parts by weight.
The amount of stearic acid used was changed to 5 parts by weight, and the amount of stearic acid used was further increased to 2.
A C magnetic disk was produced in the same manner as in Example 1 except that the amount was changed from 5 parts by weight to 5 parts by weight.
比較例３
実施例１における含浸溶液の組成において、ステアリン
酸を省き、オレイン酸の使用量を２．５重］２部から４
０重置部に変更し、さらに流動パラフィンの使用量を２
．５爪級部から１０取屓部に変更した以外は実施例１と
同様にして磁気ディスクをつくった。Comparative Example 3 In the composition of the impregnating solution in Example 1, stearic acid was omitted and the amount of oleic acid used was 2.5 parts] to 4 parts.
Change to 0 overlapping section and further increase the amount of liquid paraffin used by 2.
．． A magnetic disk was produced in the same manner as in Example 1 except that the 5-claw section was changed to a 10-claw section.
各実施例および各比較例で得られた磁気ディスクについ
て耐久性を調べるため、各磁気ディスクを汚れ防止用ジ
ャケットに挿入し′Ｃ記録再生装置に装填し、磁気ヘッ
ドをパッド圧２５１７ｃｍ２ で接触さ°せて周速１’
Ｏｍ／ｓｅｃで摺接させながら再生出力が初期出力の５
０％になるまでの走行時間を測定した。In order to examine the durability of the magnetic disks obtained in each example and each comparative example, each magnetic disk was inserted into a dirt prevention jacket, loaded into a recording/reproducing device, and brought into contact with the magnetic head with a pad pressure of 2517 cm2. Circumferential speed 1'
While sliding contact at Om/sec, the playback output is the initial output of 5.
The running time until it reached 0% was measured.
下表はその結果である。The table below shows the results.
表
上表から明らかなように、この発明によって得られた磁
気ディスク（実施例１および２）はいずれも比俊例１乃
至３で得られた磁気ディスクに比し、走行時間が長く、
このことからこの発明によって得られる磁気１記録媒体
は耐久性に優れていることがわかる１、
特許出願人 日立マクセル株式会社
＝１０As is clear from the above table, the magnetic disks obtained by the present invention (Examples 1 and 2) have a longer running time than the magnetic disks obtained in Examples 1 to 3.
From this, it can be seen that the magnetic 1 recording medium obtained by this invention has excellent durability. Patent applicant: Hitachi Maxell, Ltd. = 10
Claims (1)
コールと、炭化水素系潤滑剤とが含まれてなる磁性層を
有する磁気記録媒体1. A magnetic recording medium having a magnetic layer containing oleic acid, a higher fatty acid or higher aliphatic alcohol, and a hydrocarbon lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57141396A JPS5933622A (en) | 1982-08-14 | 1982-08-14 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57141396A JPS5933622A (en) | 1982-08-14 | 1982-08-14 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5933622A true JPS5933622A (en) | 1984-02-23 |
Family
ID=15291016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57141396A Pending JPS5933622A (en) | 1982-08-14 | 1982-08-14 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5933622A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55117736A (en) * | 1979-03-03 | 1980-09-10 | Hitachi Maxell Ltd | Magnetic recording medium |
-
1982
- 1982-08-14 JP JP57141396A patent/JPS5933622A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55117736A (en) * | 1979-03-03 | 1980-09-10 | Hitachi Maxell Ltd | Magnetic recording medium |
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