JPH01107315A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPH01107315A JPH01107315A JP26447287A JP26447287A JPH01107315A JP H01107315 A JPH01107315 A JP H01107315A JP 26447287 A JP26447287 A JP 26447287A JP 26447287 A JP26447287 A JP 26447287A JP H01107315 A JPH01107315 A JP H01107315A
- Authority
- JP
- Japan
- Prior art keywords
- film
- magnetic recording
- recording medium
- polymerizable
- 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.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 40
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 150000004668 long chain fatty acids Chemical class 0.000 claims abstract description 8
- 239000010408 film Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 239000010409 thin film Substances 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 6
- 125000005395 methacrylic acid group Chemical group 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 125000005907 alkyl ester group Chemical group 0.000 claims description 3
- 229920001567 vinyl ester resin Polymers 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 239000013047 polymeric layer Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 10
- 230000000379 polymerizing effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- XFMDETLOLBGJAX-UHFFFAOYSA-N 2-methylideneicosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCC(=C)C(O)=O XFMDETLOLBGJAX-UHFFFAOYSA-N 0.000 description 4
- 150000004671 saturated fatty acids Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- UJRIYYLGNDXVTA-UHFFFAOYSA-N ethenyl hexadecanoate Chemical compound CCCCCCCCCCCCCCCC(=O)OC=C UJRIYYLGNDXVTA-UHFFFAOYSA-N 0.000 description 2
- AFSIMBWBBOJPJG-UHFFFAOYSA-N ethenyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC=C AFSIMBWBBOJPJG-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 235000003441 saturated fatty acids Nutrition 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- ADHNUPOJJCKWRT-JLXBFWJWSA-N (2e,4e)-octadeca-2,4-dienoic acid Chemical compound CCCCCCCCCCCCC\C=C\C=C\C(O)=O ADHNUPOJJCKWRT-JLXBFWJWSA-N 0.000 description 1
- JTHZUSWLNCPZLX-UHFFFAOYSA-N 6-fluoro-3-methyl-2h-indazole Chemical compound FC1=CC=C2C(C)=NNC2=C1 JTHZUSWLNCPZLX-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- SFXIAQRTVLSMEJ-UHFFFAOYSA-N [5-(3,4-dichlorophenyl)furan-2-yl]-piperidin-1-ylmethanethione Chemical compound C1=C(Cl)C(Cl)=CC=C1C1=CC=C(C(=S)N2CCCCC2)O1 SFXIAQRTVLSMEJ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LPUZTLKYAOOFDX-QXMHVHEDSA-N ethenyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC=C LPUZTLKYAOOFDX-QXMHVHEDSA-N 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PZDUWXKXFAIFOR-UHFFFAOYSA-N hexadecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCCCOC(=O)C=C PZDUWXKXFAIFOR-UHFFFAOYSA-N 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は情報産業分野等に利用される高記録密度の磁気
記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high recording density magnetic recording medium used in the information industry and the like.
従来の技術
従来の、７−Ｆｅ２０１、ＣＯ含有７−Ｆｅ２０１、Ｃ
ｒＯ２等の強磁性粉末を有機バインダー中に分散して非
磁性基板に塗布した塗布型磁気記録媒体に代わって、メ
ツキ法、スパッタリング法、真空蒸着法、イオンプレー
チング法等の方法によって強磁性金属薄膜を非磁性基板
上に設けた磁気記録媒体は高記録密度用磁気記録媒体と
して研究されている。Conventional technology Conventional, 7-Fe201, CO-containing 7-Fe201, C
Instead of coating-type magnetic recording media in which ferromagnetic powder such as rO2 is dispersed in an organic binder and coated on a non-magnetic substrate, ferromagnetic metal can be produced by methods such as plating, sputtering, vacuum evaporation, and ion plating. Magnetic recording media in which a thin film is provided on a nonmagnetic substrate are being researched as magnetic recording media for high recording density.
、しかしながら、上述した方法で作れた強磁性金属薄膜
を用いた磁気記録媒体は、滑性・走行性・耐摩耗性に問
題がある。However, the magnetic recording medium using the ferromagnetic metal thin film produced by the method described above has problems in slipperiness, runnability, and wear resistance.
そもそも磁気記録媒体は磁気信号の記録・再生の過程に
おいて、磁気ヘッドとの高速相対運動のもとに置かれる
。この時、磁気記録媒体の走行が円滑でかつ安定な状態
で行われなければならない。To begin with, magnetic recording media are placed under high-speed relative motion with a magnetic head during the process of recording and reproducing magnetic signals. At this time, the magnetic recording medium must run smoothly and stably.
また、磁気ヘッドとの接触による摩耗や破損が起きては
ならない。Furthermore, wear and damage due to contact with the magnetic head must not occur.
しかしながら上述した方法でつくられた強磁性金属薄膜
は磁気記録、再生の過程の過酷な条件に耐えることがで
きず、磁気ヘッド等との摩擦によって走行が不安定にな
ったり、中耗粉の発生によって著しく出力が低下するこ
とがあった。そのため、強磁性金属薄膜の上に直接飽和
脂肪酸またはその金属塩よりなる単分子層を形成するこ
とが提案されている（特開昭５０−７５００１号公報）
発明が解決しようとする問題点
しかしながら、この場合初期の潤滑性は若干改善がみら
れるが、滑性耐久性がなく、走行安定性及び耐摩耗性に
ついても未だ十分であるといえない、これは、飽和脂肪
酸よりなる単分子層の膜強度が弱いために、走行中に摺
動する磁気ヘッド等により、飽和脂肪酸が削落されるか
らである。However, the ferromagnetic metal thin film made by the method described above cannot withstand the harsh conditions of the magnetic recording and reproducing process, causing unstable running due to friction with the magnetic head, etc., and the generation of wear particles. In some cases, the output may drop significantly. Therefore, it has been proposed to form a monomolecular layer of saturated fatty acid or its metal salt directly on a ferromagnetic metal thin film (Japanese Unexamined Patent Publication No. 75001/1982).
Problems to be Solved by the Invention However, although the initial lubricity is slightly improved in this case, there is no lubricity durability, and running stability and wear resistance are still not sufficient. This is because the film strength of the monomolecular layer made of saturated fatty acids is weak, so that the saturated fatty acids are scraped off by a sliding magnetic head or the like during running.
本発明はかがる点に鑑みてなされたのもので、滑性耐久
性・走行性・耐摩耗性のすぐれた磁気記録媒体を提供す
ることを目的としている。The present invention has been made in view of these problems, and an object of the present invention is to provide a magnetic recording medium with excellent lubricity, durability, runnability, and abrasion resistance.
間ｍＪ解決するための手段
非磁性基板上に設けた強磁性金属薄膜上に少なくとも１
層の重合性ＬＢ膜の高分子層を設ける。Means for solving the problem of mJ
A polymer layer of the polymerizable LB film is provided.
作用
不飽和結合を持つ長鎖脂肪酸等のＬＢ膜が重合して高分
子を形成しているので、ＬＢ膜自身の膜強度が低分子か
らなるＬＢｗＡより高くなる。Since the LB film of long-chain fatty acids and the like having active unsaturated bonds is polymerized to form a polymer, the film strength of the LB film itself is higher than that of LBwA made of low molecules.
そのため、磁気ヘッド等との摩擦によって、前記ＬＢ膜
が削り落とされることがないので、潤滑耐久性・走行性
・耐摩耗性のすぐれた磁気記録媒体が得られる。Therefore, the LB film is not scraped off by friction with the magnetic head, etc., so that a magnetic recording medium with excellent lubrication durability, runnability, and wear resistance can be obtained.
実施例
図は本発明の磁気記録媒体の断面図である。図において
、１は非磁性基板、２は強磁性金属薄膜、３は重合性Ｌ
Ｂ膜の高分子層である。The embodiment diagram is a cross-sectional view of the magnetic recording medium of the present invention. In the figure, 1 is a non-magnetic substrate, 2 is a ferromagnetic metal thin film, and 3 is a polymerizable L.
This is the polymer layer of the B film.
本発明による磁気記録媒体に使用しうる非磁性基板１と
しては、ポリ塩化ビニル、酢酸セルロース、ポリエチレ
ンテレフタレート、ポリイミド、ポリアミド等の高分子
材料、非磁性金属材料、ガラス、磁器等のセラミックス
材料等の周知の材料からなるフィルム、板等がある。
また、本発明の磁気記録媒体に使用しうる強磁性金属薄
［２を形成する強磁性材料としては、周知の任意の材料
が使用でき、例えば、鉄、コバルト、ニッケルの１種以
上の合金またはこれらと、他の金属例えばマンガン、ク
ロム、チタン、リン、イツトリウム、サマリウム、ビス
マス等を組み合わせた合金があり、また上記金属の酸化
物がある。Examples of the non-magnetic substrate 1 that can be used in the magnetic recording medium of the present invention include polymer materials such as polyvinyl chloride, cellulose acetate, polyethylene terephthalate, polyimide, and polyamide, non-magnetic metal materials, and ceramic materials such as glass and porcelain. There are films, plates, etc. made of well-known materials.
Further, as the ferromagnetic material forming the ferromagnetic metal thin film [2] that can be used in the magnetic recording medium of the present invention, any known material can be used, such as an alloy of one or more of iron, cobalt, and nickel; There are alloys that combine these with other metals such as manganese, chromium, titanium, phosphorus, yttrium, samarium, bismuth, etc., and there are also oxides of the above metals.
非磁性基板１の上に強磁性金属薄膜２を形成させるにあ
たっては、真空蒸着法、スパッタリング法、イオンブレ
ーティング法、メツキ法等任意の周知の方法で形成させ
ることができる。The ferromagnetic metal thin film 2 can be formed on the non-magnetic substrate 1 by any known method such as a vacuum evaporation method, a sputtering method, an ion blasting method, or a plating method.
本発明にようば上述した強磁性金属薄膜２の上に、重合
性ＬＢ膜の高分子層３を設ける。According to the present invention, a polymer layer 3 of a polymerizable LB film is provided on the ferromagnetic metal thin film 2 described above.
本発明で使用しうる重合性ＬＢ膜は不飽和結合を持つ長
鎖脂肪酸、長鎖脂肪酸のビニルエステル、もしくはアク
リル（メタアクリル）酸の長鎖アルキルエステルのうち
少なくとも１つを含んでいる。The polymerizable LB film that can be used in the present invention contains at least one of a long chain fatty acid having an unsaturated bond, a vinyl ester of a long chain fatty acid, or a long chain alkyl ester of acrylic (methacrylic) acid.
不飽和結合を持つ長鎖脂肪酸の例としてα−オクタデシ
ルアクリル酸、ω−トリコセン酸、１６−へブタデセン
酸、オクタデカジエン酸等が上げられる。Examples of long-chain fatty acids having unsaturated bonds include α-octadecyl acrylic acid, ω-tricosenic acid, 16-hebutadenoic acid, and octadecadienoic acid.
長鎖脂肪酸のビニルエステルの例としては、ステアリン
酸ビニル、パルミチン酸ビニル、オレイン酸ビニルなど
が上げられる。Examples of vinyl esters of long chain fatty acids include vinyl stearate, vinyl palmitate, vinyl oleate, and the like.
アクリル（メタアクリル）酸の長鎖アルキルエステルの
例としては、アクリル（メタアクリル）酸ステアリル、
アクリル（メタアクリル）酸パルミチル、アクリル（メ
タアクリル）酸アラキニル等が例として上げられる。Examples of long chain alkyl esters of acrylic (methacrylic) acids include stearyl acrylic (methacrylic) acid,
Examples include palmityl acrylic (methacrylic) acid, araquinyl acrylic (methacrylic) acid, and the like.
強磁性金属薄膜２の上に、前記重合性ＬＢ膜の高分子膜
層３を形成させる方法としては、ラングミュアーブロジ
ェ’ｙト（ＬＢ）法（Ｐｈｙｓ、Ｒｅｖ、５１（１９３
７）９６４． ）がある、 本発明により強磁性金属薄
Ｈ２上に、前記重合性ＬＢ膜の高分子層３を形成する場
合、１層〜２１層が好適であり、３層〜１５１１１が滑
性の点で好ましかった。ただし、膜厚を５０ｎｍ以下に
する必要がある。５’Ｏｎｍより大きくなると、信号の
再生時にスペーシングロスにより出力が低下するので好
ましくない。A method for forming the polymer film layer 3 of the polymerizable LB film on the ferromagnetic metal thin film 2 is the Langmuir-Bloggert (LB) method (Phys, Rev. 51 (1933).
7)964. ), When forming the polymer layer 3 of the polymerizable LB film on the ferromagnetic metal thin H2 according to the present invention, 1 to 21 layers are suitable, and 3 to 15111 are suitable in terms of slipperiness. I liked it. However, the film thickness needs to be 50 nm or less. If it is larger than 5'Onm, the output will decrease due to spacing loss during signal reproduction, which is not preferable.
ＬＢ膜を重合させるには、ＬＢ膜を形成後、ガンマ線、
紫外線あるいは電子線を照射して重合させる。To polymerize the LB film, after forming the LB film, gamma rays,
Polymerize by irradiating with ultraviolet rays or electron beams.
以下に具体的な例を挙げて本発明を説明する。The present invention will be explained below by giving specific examples.
実施例１
厚さ１０μｍのポリイミドフィルム基板に、真空蒸着に
よりコバルト（９０％）−クロム（１０％）からなる膜
厚１５０ｎｍの強磁性金属薄膜をつくった。この強磁性
金属薄膜を形成した基板から１０１００Ｘ１００の大き
さの片を切り取り、上記金属薄膜の上に、ＬＢ膜累積装
置（協和界面科学製）を用い、α−オクタデシルアクリ
ル酸の単分子層を３層形成した。次に高圧水銀ランプを
用いて２００ｍＪ／ｃｍ２のエネルギー量の紫外線を照
射し、累積膜を重合させた。Example 1 A 150 nm thick ferromagnetic metal thin film made of cobalt (90%)-chromium (10%) was formed on a 10 μm thick polyimide film substrate by vacuum deposition. A piece measuring 10100 x 100 was cut from the substrate on which this ferromagnetic metal thin film was formed, and a monomolecular layer of α-octadecyl acrylic acid was deposited on the metal thin film for three times using an LB film accumulation device (manufactured by Kyowa Kaimen Kagaku). layered. Next, ultraviolet rays with an energy amount of 200 mJ/cm 2 were irradiated using a high-pressure mercury lamp to polymerize the cumulative film.
実施例２〜８
実施例１におけるα−オクタデシルアクリル酸を下記の
組成の化合物に代え、同じ条件で累積膜を重合させ、試
料を作成した。Examples 2 to 8 Samples were prepared by replacing α-octadecyl acrylic acid in Example 1 with a compound having the composition shown below, and polymerizing cumulative films under the same conditions.
実施例２ ω−トリコセン酸
実施例３ ステアリン酸ビニル
実施例４ パルミチン酸ビニル
実施例５ アクリル酸ステアリル
実施例６ アクリル酸パルミチル
実施例７ メタアクリル酸ステアリル実施例８
メタアクリル酸ステアリル比較例
実施例１におけるα−オクタデシルアクリル酸を下記の
下記の化合物に代えて、単分子膜を形成した。Example 2 ω-tricosenic acid Example 3 Vinyl stearate Example 4 Vinyl palmitate Example 5 Stearyl acrylate Example 6 Palmityl acrylate Example 7 Stearyl methacrylate Example 8
Comparative Example of Stearyl Methacrylate A monomolecular film was formed by replacing α-octadecyl acrylic acid in Example 1 with the following compound.
比較例１ ステアリン酸
比較例２ パルミチン酸
実施例１〜８で作成した試料の重合膜をエリプソメータ
で測定したところ、膜厚は７〜８ｎｍであった。Comparative Example 1 Stearic Acid Comparative Example 2 Palmitic Acid When the polymerized films of the samples prepared in Examples 1 to 8 were measured with an ellipsometer, the film thickness was 7 to 8 nm.
実施例１〜８、比較例１〜２の試料の動掌擦係数を摩擦
傷数計（ＤＦＰＭ計、協和界面科学製〉で測定した。用
いたヘッドは直径３ｍｍの鋼球で、ヘッド荷重１００ｇ
、ヘッドの走行速度１．Ｏｍｍ／ｓで測定した。その結
果を下記の表に示す。The dynamic palm friction coefficients of the samples of Examples 1 to 8 and Comparative Examples 1 to 2 were measured using a friction flaw meter (DFPM meter, manufactured by Kyowa Kaimen Kagaku).The head used was a steel ball with a diameter of 3 mm, and the head load was 100 g.
, head running speed 1. Measured at Omm/s. The results are shown in the table below.
（以下余白）
表（続き）
表のデータから本発明による実施例１〜８の磁気記録媒
体は初期動摩擦係数はもちろん、２００回往復後におい
ても動阜擦係数が低く、滑性耐久性において、比較例よ
りもすぐれていることがわかる。(Margins below) Table (Continued) From the data in the table, the magnetic recording media of Examples 1 to 8 according to the present invention have low dynamic friction coefficients not only in the initial dynamic friction coefficient but also after 200 reciprocations, and in terms of slipperiness durability. It can be seen that this is superior to the comparative example.
またこれらの磁気記録媒体を直径７５ｍｍの大きさの片
に切り取り、市販のフロッピーディスクと同等の機能を
有する試験機で走行させたところ、実施例１〜８の磁気
記録媒体はいずれも、１００時間後も、走行が安定し、
摩耗傷はみられなかった。それに対し比較例の磁気記録
媒体は走行が不安定になり、磁性面に摩耗傷が見られた
。 なお以上の実施例では、磁気ディスクについて示し
たが、本発明の磁気記録媒体は、磁気テープ、磁気カー
ド等にも適用できることは明かである。Furthermore, when these magnetic recording media were cut into pieces with a diameter of 75 mm and run on a test machine having the same function as a commercially available floppy disk, all of the magnetic recording media of Examples 1 to 8 were able to last for 100 hours. Even after that, the running is stable,
No wear scratches were observed. On the other hand, the magnetic recording medium of the comparative example ran unstable, and wear scratches were observed on the magnetic surface. In the above embodiments, magnetic disks have been described, but it is clear that the magnetic recording medium of the present invention can also be applied to magnetic tapes, magnetic cards, and the like.
発明の効果
本発明の磁気記録媒体は、滑性耐久性・走行性・耐摩耗
性にすぐれ、それを長時間維持することができる。Effects of the Invention The magnetic recording medium of the present invention has excellent lubricity durability, runnability, and abrasion resistance, and can maintain these properties for a long time.
図は本発明の実施例における磁気記録媒体の断面図であ
る。
１・・・・非磁性基板、２・・・・強磁性金属薄膜、３
・・・・重合性ＬＢ膜の高分子膜層。
代理人の氏名 弁理士 中尾敏男 はか１名３ 重合性
ＬＢ膜の高分子層The figure is a sectional view of a magnetic recording medium in an embodiment of the present invention. 1...Nonmagnetic substrate, 2...Ferromagnetic metal thin film, 3
...Polymer membrane layer of polymerizable LB membrane. Name of agent: Patent attorney Toshio Nakao Haka 1 person 3 Polymer layer of polymerizable LB film
Claims (2)
くとも１層の重合性ＬＢ膜の高分子層を設けた磁気記録
媒体。(1) A magnetic recording medium in which at least one polymeric layer of a polymerizable LB film is provided on a ferromagnetic metal thin film provided on a nonmagnetic substrate.
長鎖脂肪酸のビニルエステル、もしくはアクリル（メタ
クリル）酸の長鎖アルキルエステルのうち少なくとも１
つを含む特許請求の範囲第１項記載の磁気記録媒体。(2) The polymerizable LB film contains long chain fatty acids with unsaturated bonds,
At least one of vinyl esters of long-chain fatty acids or long-chain alkyl esters of acrylic (methacrylic) acid.
The magnetic recording medium according to claim 1, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264472A JPH07105038B2 (en) | 1987-10-20 | 1987-10-20 | Method of manufacturing magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264472A JPH07105038B2 (en) | 1987-10-20 | 1987-10-20 | Method of manufacturing magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01107315A true JPH01107315A (en) | 1989-04-25 |
| JPH07105038B2 JPH07105038B2 (en) | 1995-11-13 |
Family
ID=17403696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62264472A Expired - Fee Related JPH07105038B2 (en) | 1987-10-20 | 1987-10-20 | Method of manufacturing magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07105038B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148124A (en) * | 1984-08-14 | 1986-03-08 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS62273624A (en) * | 1986-05-21 | 1987-11-27 | Hitachi Maxell Ltd | Magnetic recording medium and its production |
-
1987
- 1987-10-20 JP JP62264472A patent/JPH07105038B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148124A (en) * | 1984-08-14 | 1986-03-08 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS62273624A (en) * | 1986-05-21 | 1987-11-27 | Hitachi Maxell Ltd | Magnetic recording medium and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07105038B2 (en) | 1995-11-13 |
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