JPH0338652B2 - - Google Patents
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- Publication number
- JPH0338652B2 JPH0338652B2 JP18283884A JP18283884A JPH0338652B2 JP H0338652 B2 JPH0338652 B2 JP H0338652B2 JP 18283884 A JP18283884 A JP 18283884A JP 18283884 A JP18283884 A JP 18283884A JP H0338652 B2 JPH0338652 B2 JP H0338652B2
- Authority
- JP
- Japan
- Prior art keywords
- deposited
- vapor
- magnetic
- film
- magnetic recording
- 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.)
- Expired
Links
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- 238000004519 manufacturing process Methods 0.000 claims description 11
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- 239000000178 monomer Substances 0.000 claims description 5
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- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 4
- ISAOCJYIOMOJEB-UHFFFAOYSA-N desyl alcohol Natural products C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
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- 239000010409 thin film Substances 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 244000028419 Styrax benzoin Species 0.000 description 2
- 235000000126 Styrax benzoin Nutrition 0.000 description 2
- 235000008411 Sumatra benzointree Nutrition 0.000 description 2
- 229960002130 benzoin Drugs 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
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- 235000019382 gum benzoic Nutrition 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- -1 polyol acrylate Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229940037312 stearamide Drugs 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 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
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
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- 238000004381 surface treatment Methods 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Physical Vapour Deposition (AREA)
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Description
（産業上の利用分野）
本発明は、磁気テープ、磁気デイスクなどに適
用し得る耐摩耗性磁気記録体の製造法に関する。
（従来の技術）
近年、磁性金属や磁性酸化物などの磁性薄膜を
非磁性基板上に形成した磁気記録体は、高密度記
録が可能なため盛んに研究され、１部実用化され
ている。この主なものは、Co−Niメツキデイス
ク、γFe2O3デイスク、Co−Crデイスク或はテー
プ、Co−Ni蒸着テープ、BaO・Fe2O3デイスク
等である。これらの磁性膜は、Al、ガラス、セ
ラミツクス、プラスチツクフイルム等の非磁性基
板上に、約200〜5000Åの極めて薄い膜厚に形成
されるので、記録や再生の際に、ヘツドに摺動す
ると激しい摩擦のために、該磁性膜は摩耗し、長
時間使用できなくなる欠点を有する。
この耐摩耗性を向上させるため、従来種々の方
法が試みられて居る。その１つは、磁性膜表面
に、高分子樹脂の薄膜を形成することであるが、
その方法に２つあり、その１つは、高分子樹脂を
有機溶剤に溶かして、磁性膜面に塗布、乾燥する
方法、他の１つは、高分子樹脂を磁性膜面にスパ
ツタリング又は真空蒸着によりその蒸着膜を形成
する方法である。前者の方法では、1000Å以下、
好ましくは300Å以下の塗膜をつくることがむづ
かしい。後者の方法は、高分子樹脂をスパツタリ
ングしたり、加熱蒸発させると、重合している分
子が分解し、良質の耐摩耗性保護膜が得られない
などの欠点がある。
（発明が解決しようとする問題点）
本発明は、上記の従来法の欠点を解消し、均一
な膜厚の耐摩耗性の大きい高分子樹脂被膜を備え
た耐摩耗性磁気記録体の製造法を提供するもので
ある。
（問題点を解決するための手段）
本発明の上記の問題点を解決するための耐摩耗
性磁気記録体の製造法は、磁気記録体の磁性膜面
に直接又は間接に紫外線あるいは電子線硬化型樹
脂を、蒸着させ、その末重合の蒸着膜面に紫外線
あるいは電子線を照射し硬化せしめることを特徴
とする。
（実施例）
本発明の実施例を次に説明する。
本発明で使用する照射線硬化型樹脂は、紫外線
照射又は電子線照射などで重合硬化するポリエス
テルアクリレート、エポキシアクリレート、ポリ
オールアクリレート、ポリウレタンアクリレー
ト、不飽和ポリエステルなどの樹脂モノマー又は
オリゴマーである。尚硬化促進のため、触媒や硬
化剤を併用混入するようにしてもよい。紫外線照
射の場合には、ベンジル、ベンゾフエノン、ベン
ゾインアルキルエーテルなどの光重合開始剤も用
いられる。
本発明によれば、常温で極めて短時間に硬化し
得られるので、磁気テープのような加熱すること
に適しない磁気記録体の耐摩耗性の向上に適す
る。
上記の原料を用意し、例えば第１図示の装置を
使用し本発明を実施する。即ち、第１図は、電子
線照射型の本発明方法を実施する真空蒸着装置を
示し、１は真空ポンプに排気口２を介し接続する
真空処理容器を示し、その内部中央部に円胴回転
冷却キヤン３とその上方左右に１対のまき出しロ
ーラー４とまき取りローラー５とその冷却キヤン
３の下端の左右に防着板６を配置し、その直下に
電熱式などの加熱源容器７を設置する。本発明に
よれば、該加熱源容器７内に上記した照射線硬化
型樹脂モノマー又はオリゴマー８をその少くとも
１種を選択して充填用意する。更に本発明によれ
ば、冷却キヤン３の外周面を走行する磁気テープ
ａの下流側に位置して該磁気テープに対向して電
子線照射装置（電子銃装置）８を設ける。
図示では、電子銃９は、真空処理容器１の側壁
１ａの１部に固設した。
本発明の耐摩耗性磁気記録体を製造するには、
処理すべき基材に例えばCo・Ni・Ｏの磁性膜を
備えた磁気テープａをまき出しロール４とまき取
りロール５との間にその中央の冷却キヤン３の周
面を介してかけ渡し、一定の速度で矢示のように
走行せしめる１方、真空処理容器１内を排気し、
一定の真空減圧下で、加熱蒸発源７より硬化型樹
脂モノマー又はオリゴマーを蒸発せしめて、これ
を前記走行する磁気テープの表面の薄型磁性膜面
に蒸着せしめる。その末重合の蒸着膜を形成され
た磁気テープａはその回動前進に伴ない、電子銃
９よりの電子線を、適宜の走行距離間において、
その蒸着膜面に照射せしめるときは、該蒸着膜は
重合硬化して硬化高分子樹脂膜となり、この硬化
樹脂膜が磁性膜面に結着したその保護被膜をもつ
た耐摩耗性磁気テープがまき取りローラー５上に
得られる。
更に、本願は、上記本発明の耐摩耗性磁気記録
体として、潤滑剤を付与して更にその耐摩耗性の
向上した磁気記録体を製造する第２発明を提供す
るもので、磁気記録体の表面に紫外線あるいは電
子線硬化型樹脂と紫外線を用いる場合には光重合
開始剤とを蒸着させその末重合の蒸着膜の重合硬
化過程において潤滑剤蒸気を付着させた後、蒸着
膜面に紫外線あるいは電子線を照射し硬化せしめ
ることを特徴とする。
この潤滑剤としては、代表的には、高級脂肪
酸、その金属塩、アミド、フルオロカルボン酸、
その塩、炭化水素系パラフイン、ハロゲン化炭
素、などの有機系潤滑剤を使用する。
この第２発明を実施するには、前記第１図示の
装置において、前記硬化型樹脂の蒸発源容器７の
下流側に追加の蒸発源容器７を設け、その中に潤
滑剤１０を充填して用意し、前記装置に硬化型樹
脂の蒸着に加え、該潤滑剤１０を加熱蒸発させ
て、該樹脂の重合硬化過程において、潤滑剤の蒸
気を混入させて或はその表面に付着させて、この
状態の混合蒸着面にその後電子線を照射するよう
にするときは、その硬化高分子樹脂膜中に或はそ
の表面に潤滑剤が併存した潤滑性が良好に付与さ
れた更に耐摩耗性の向上した保護膜により磁性膜
面を被覆保護された本発明の耐摩耗性磁気記録体
が得られる。而して、この場合、混在の蒸着潤滑
剤は、重合性樹脂の重合硬化によるバインダーの
ような作用により強固に保持されるので、長時間
に亘り使用持続する潤滑作用を保証し、いわゆる
油切れの状態になることが良好に防止される。
第２図は、本発明を実施する紫外線照射型の真
空蒸着装置を示し、第１図示の装置とは、光重合
開始剤１１を充填した蒸発源加熱容器７を該硬化
型樹脂モノマー又はオリゴマー８を充填した容器
７に隣接付加したこと、並に、電子線照射装置９
に代えて、紫外線照射装置１２を冷却キヤン３の
下流側外側面に設けたことの点で相異する以外は
他の構成は第１図示の装置と同じである。該紫外
線照射装置１２は例えば、図示のように、多数の
高圧水銀ランプ１２ａ，１２ａ……をそのキヤン
３周面に沿い配設して構成する。
本装置を使用し、本発明の耐摩耗性磁気記録体
を製造するには、第１図示の装置と略同様に実施
するが、この場合、光重合開始剤を加熱蒸発せし
めて、これを走行磁気テープａの表面に蒸着させ
これを先に蒸着の硬化型樹脂モノマー又はオリゴ
マーの蒸着面中に混在させてその重合を開始せし
めるようにし、その後、その磁気テープａの前進
に伴ない、その蒸着面に紫外線照射装置１２より
の紫外線を一定時間照射して重合硬化反応を行な
いまき取りテープ５上に高分子樹脂皮膜をもつた
耐摩耗性の本発明磁気記録体製品を得ることが出
来る。
尚、更にこの製品に、潤滑剤により潤滑性を付
与し更に耐摩耗性を向上する製品を得るには、第
１図示の装置による実施例で記載したと同様に、
潤滑剤を加熱蒸発させることにより達成される。
尚、第１図及び第２図の装置とは別に、電子線
照射装置と紫外線照射装置との両方を１つの真空
蒸着装置内に備えて、適宜選択使用するように構
成すれば、設備が簡単となる。
前記の実施例では、磁気記録体の磁性膜面に直
接本発明の保護膜を形成せしめるようにしたが、
該磁性膜面の表面に金属酸化物などの無機質層、
高分子樹脂などの有機質の保護層などの表面に形
成するようにしても、全く同様の耐摩性効果をも
たらす。これは、照射線硬化型樹脂が殆んどの無
機物や有機物に対し強力な結着力をもつているか
らである。
又、前記の潤滑剤の蒸着は、その蒸着量を比較
的多量に行なうと、重合硬化した高分子樹脂膜面
に肉薄の潤滑剤析出層を形成することができるこ
とは、上記の実施例より容易に分る。
次に更に詳細な実施例を記載する。
実施例 １
処理すべき磁気記録体として、12μｍ厚のポリ
エステルフイルム上に、斜め蒸着法により1500Å
厚のCo−Ni−Ｏの磁性膜を形成した磁気テープ
を使用した。第１図の装置内に該磁気テープを装
着し、一定速度１ｍ／分で冷却キヤンに密着させ
て走行せしめる１方、真空処理容器内を真空度２
×10-5トールに排気減圧した状態とし、エポキシ
アクリレート（昭和高分子株製VR−90）の樹脂
オリゴマーを一定の蒸発速度で加熱蒸発せしめ
る。蒸発源には、熱電対を設置して蒸発速度を所
望に調節し得るようにしてある。
次でその蒸着面に電子線を照射する。
電子線による照射時間は、電子線の照射出力や
硬化型樹脂の種類により異なるが一般に0.1〜10
秒程度で足り、例えば、60KV、10ｍＡで１秒照
射する。かくして電子線照射硬化樹脂膜をもつた
製品を得た。
別に、潤滑剤を同時に蒸着させた製品を作成し
たが、この場合は、例えばステアリン酸アミドを
一定の蒸発速度で蒸着させた。冷却キヤンによ
り、電子線照射中の磁気テープの冷却を行なうこ
とは好ましいが、必ずしも必要でない。
このように作成した本発明耐摩耗性磁気テープ
につき、VTRテープのスチル再生寿命を測定し
た。比較のため、表面処理を全く行なわない同じ
磁気テープと、潤滑剤のみを蒸着した耐摩耗性磁
気テープとについても測定した。その結果は下記
表１に示す通りであつた。
(Industrial Application Field) The present invention relates to a method for manufacturing a wear-resistant magnetic recording medium that can be applied to magnetic tapes, magnetic disks, and the like. (Prior Art) In recent years, magnetic recording bodies in which a magnetic thin film of magnetic metal or magnetic oxide is formed on a non-magnetic substrate have been actively researched and some have been put into practical use because they enable high-density recording. The main ones are Co--Ni plated disk, γFe 2 O 3 disk, Co--Cr disk or tape, Co--Ni vapor deposited tape, BaO.Fe 2 O 3 disk, etc. These magnetic films are formed on non-magnetic substrates such as Al, glass, ceramics, and plastic films to an extremely thin film thickness of about 200 to 5000 Å, so they can be violently rubbed against the head during recording or playback. Due to friction, the magnetic film is worn out and cannot be used for a long time. In order to improve this wear resistance, various methods have been tried in the past. One method is to form a thin film of polymer resin on the surface of the magnetic film.
There are two methods: one is to dissolve the polymer resin in an organic solvent, apply it to the magnetic film surface and dry it, and the other is to sputter or vacuum evaporate the polymer resin onto the magnetic film surface. This is a method of forming the deposited film. In the former method, the thickness is less than 1000Å,
Preferably, it is difficult to form a coating film with a thickness of 300 Å or less. The latter method has the disadvantage that if the polymer resin is sputtered or heated and evaporated, the polymerized molecules will decompose, making it impossible to obtain a high-quality wear-resistant protective film. (Problems to be Solved by the Invention) The present invention solves the drawbacks of the above-mentioned conventional methods, and provides a method for manufacturing a wear-resistant magnetic recording material having a high wear-resistant polymer resin coating with a uniform thickness. It provides: (Means for Solving the Problems) A method for manufacturing a wear-resistant magnetic recording body to solve the above-mentioned problems of the present invention is to directly or indirectly harden the magnetic film surface of the magnetic recording body with ultraviolet rays or electron beams. The method is characterized in that a mold resin is vapor-deposited, and the surface of the final polymerized vapor-deposited film is irradiated with ultraviolet rays or electron beams to cure it. (Example) An example of the present invention will be described below. The radiation-curable resin used in the present invention is a resin monomer or oligomer such as polyester acrylate, epoxy acrylate, polyol acrylate, polyurethane acrylate, or unsaturated polyester, which is polymerized and cured by ultraviolet irradiation or electron beam irradiation. In order to accelerate curing, a catalyst and a curing agent may be mixed together. In the case of ultraviolet irradiation, photopolymerization initiators such as benzyl, benzophenone, and benzoin alkyl ether are also used. According to the present invention, since it can be cured at room temperature in an extremely short time, it is suitable for improving the abrasion resistance of magnetic recording bodies that are not suitable for heating, such as magnetic tapes. The above raw materials are prepared and the present invention is carried out using, for example, the apparatus shown in the first diagram. That is, FIG. 1 shows an electron beam irradiation type vacuum evaporation apparatus for carrying out the method of the present invention, and numeral 1 indicates a vacuum processing container connected to a vacuum pump through an exhaust port 2. A cooling can 3, a pair of unwinding rollers 4 and a winding roller 5 on the left and right sides above the cooling can 3, adhesion prevention plates 6 are arranged on the left and right sides of the lower end of the cooling can 3, and a heating source container 7 such as an electric heating type is placed directly below them. Install. According to the present invention, the heat source container 7 is filled with at least one of the radiation-curable resin monomers or oligomers 8 described above. Further, according to the present invention, an electron beam irradiation device (electron gun device) 8 is provided at the downstream side of the magnetic tape a running on the outer peripheral surface of the cooling can 3 and facing the magnetic tape. In the illustration, the electron gun 9 is fixed to a part of the side wall 1a of the vacuum processing chamber 1. To manufacture the wear-resistant magnetic recording body of the present invention,
A magnetic tape a having a magnetic film of, for example, Co, Ni, O on the substrate to be treated is passed between a winding roll 4 and a winding roll 5 via the circumferential surface of the central cooling can 3. The inside of the vacuum processing container 1 is evacuated while the vacuum processing container 1 is made to run at a constant speed as shown by the arrow.
The curable resin monomer or oligomer is evaporated from the heating evaporation source 7 under constant vacuum and reduced pressure, and is deposited on the thin magnetic film on the surface of the running magnetic tape. As the magnetic tape a, on which the polymerized vapor deposited film has been formed, rotates forward, the electron beam from the electron gun 9 is applied to it over an appropriate traveling distance.
When the surface of the deposited film is irradiated, the deposited film polymerizes and hardens to become a hardened polymer resin film, and this hardened resin film is bonded to the magnetic film surface and a wear-resistant magnetic tape with a protective coating is wound. It is obtained on the take-off roller 5. Furthermore, the present application provides a second invention for producing a magnetic recording body whose abrasion resistance is further improved by applying a lubricant as the wear-resistant magnetic recording body of the present invention. When ultraviolet rays or electron beam curable resin and ultraviolet rays are used, a photopolymerization initiator is deposited on the surface, and lubricant vapor is deposited during the polymerization and curing process of the deposited film. It is characterized by being cured by irradiation with electron beams. This lubricant typically includes higher fatty acids, metal salts thereof, amides, fluorocarboxylic acids,
Use organic lubricants such as its salts, hydrocarbon paraffin, and halogenated carbon. In order to carry out the second invention, in the apparatus shown in the first diagram, an additional evaporation source container 7 is provided downstream of the curable resin evaporation source container 7, and a lubricant 10 is filled in the additional evaporation source container 7. In addition to vapor depositing the curable resin in the device, the lubricant 10 is heated and evaporated, and during the polymerization and curing process of the resin, the vapor of the lubricant is mixed in or attached to the surface. When the electron beam is then irradiated onto the mixed vapor-deposited surface, a lubricant coexists in the cured polymer resin film or on its surface, which imparts good lubricity and further improves wear resistance. A wear-resistant magnetic recording body of the present invention is obtained in which the magnetic film surface is coated and protected by the protective film. In this case, the mixed vapor-deposited lubricant is firmly held by the binder-like action caused by the polymerization and hardening of the polymerizable resin, so it guarantees a lubricating effect that lasts for a long time and prevents so-called oil failure. This situation is effectively prevented. FIG. 2 shows an ultraviolet irradiation type vacuum evaporation apparatus for carrying out the present invention, and the apparatus shown in FIG. In addition, an electron beam irradiation device 9 was added adjacent to the container 7 filled with
The other configurations are the same as the device shown in the first figure, except that an ultraviolet irradiation device 12 is provided on the downstream outer surface of the cooling can 3 instead. The ultraviolet irradiation device 12 is constructed, for example, by disposing a large number of high-pressure mercury lamps 12a, 12a, . . . along the circumferential surface of the can 3, as shown in the figure. The production of the wear-resistant magnetic recording material of the present invention using this apparatus is performed in substantially the same manner as the apparatus shown in Figure 1, but in this case, the photopolymerization initiator is heated and evaporated, and then the photopolymerization initiator is The vapor is deposited on the surface of the magnetic tape a, and is first mixed into the vapor deposition surface of the curable resin monomer or oligomer to start its polymerization, and then, as the magnetic tape a moves forward, the vapor deposition is performed. The surface is irradiated with ultraviolet rays from the ultraviolet irradiation device 12 for a certain period of time to cause a polymerization and curing reaction, thereby making it possible to obtain a wear-resistant magnetic recording product of the present invention having a polymer resin film on the wind-up tape 5. Furthermore, in order to obtain a product that further improves wear resistance by imparting lubricity to this product using a lubricant, as described in the embodiment using the apparatus shown in FIG.
This is accomplished by heating and vaporizing the lubricant. In addition, apart from the devices shown in FIGS. 1 and 2, the equipment can be simplified if both an electron beam irradiation device and an ultraviolet irradiation device are provided in one vacuum evaporation device and configured to be used selectively as appropriate. becomes. In the above embodiments, the protective film of the present invention was formed directly on the magnetic film surface of the magnetic recording medium.
An inorganic layer such as a metal oxide on the surface of the magnetic film,
Even if it is formed on the surface of an organic protective layer such as a polymer resin, the same abrasion resistance effect can be obtained. This is because radiation-curable resins have strong binding power to most inorganic and organic substances. In addition, it is easier to form a thin lubricant deposit layer on the surface of the polymerized resin film when the lubricant is deposited in a relatively large amount. It is divided into Next, more detailed examples will be described. Example 1 As a magnetic recording medium to be processed, a film of 1500 Å was deposited on a 12 μm thick polyester film by oblique vapor deposition.
A magnetic tape on which a thick Co--Ni--O magnetic film was formed was used. The magnetic tape is installed in the apparatus shown in Fig. 1, and is run at a constant speed of 1 m/min in close contact with the cooling can.
The exhaust pressure was reduced to ×10 -5 Torr, and the resin oligomer of epoxy acrylate (Showa Kobunshi Co., Ltd. VR-90) was heated and evaporated at a constant evaporation rate. A thermocouple is installed in the evaporation source so that the evaporation rate can be adjusted as desired. Next, the deposition surface is irradiated with an electron beam. The irradiation time with an electron beam varies depending on the irradiation output of the electron beam and the type of hardening resin, but generally it is 0.1 to 10
About a second is enough, for example, irradiation at 60KV and 10mA for 1 second. In this way, a product having a resin film cured by electron beam irradiation was obtained. Separately, products were made in which a lubricant was co-deposited, such as stearamide, which was deposited at a constant evaporation rate. Although it is preferable to use a cooling can to cool the magnetic tape during electron beam irradiation, it is not necessary. Regarding the abrasion-resistant magnetic tape of the present invention thus prepared, the still playback life of the VTR tape was measured. For comparison, measurements were also made on the same magnetic tape without any surface treatment and on a wear-resistant magnetic tape on which only a lubricant was deposited. The results were as shown in Table 1 below.
【表】
実施例 ２
処理すべき磁気記録体として、12μｍ厚のポリ
エステルフイルム上に、斜め蒸着法により1500Å
のCo−20Ni−０の磁性膜を形成した磁気テープ
を使用した。第２図示の装置内に、磁気テープを
装着し、一定速度0.1ｍ／分で冷却キヤンに密着
させて走行せしめる１方真空処理容器内を真空度
２×10-5トールに排気減圧した状態とし、樹脂オ
リゴマーとしてエポキシアクリレートと光重合開
始剤としてベンゾインとを夫々一定の蒸発速度で
加熱蒸発せしめる。次でその蒸着面に紫外線を照
射する。紫外線による照射時間は、紫外線の強
さ、硬化型樹脂の種類により異なるが、一般に１
秒〜５分間程度で足り、例えば80Wで５分間照射
する。
かくして紫外線照射硬化樹脂膜をもつた製品を
得た別に、潤滑剤を同時に蒸着させた製品を作成
したが、この場合、ステアリン酸アミドを一定の
蒸発速度で蒸着させた。
このように作成した本発明耐摩耗性磁気テープ
につき、VTRテープのスチル再生寿命を測定し
た。その結果は下記表２に示す。[Table] Example 2 As a magnetic recording medium to be processed, a film of 1500 Å was deposited on a 12 μm thick polyester film by oblique vapor deposition.
A magnetic tape having a Co-20Ni-0 magnetic film formed thereon was used. A magnetic tape is attached to the apparatus shown in Figure 2, and the one-way vacuum processing vessel is run at a constant speed of 0.1 m / min in close contact with the cooling can. Epoxy acrylate as a resin oligomer and benzoin as a photopolymerization initiator are heated and evaporated at a constant evaporation rate. Next, the vapor-deposited surface is irradiated with ultraviolet light. The irradiation time with ultraviolet rays varies depending on the intensity of the ultraviolet rays and the type of curing resin, but generally it takes about 1
Approximately 5 seconds to 5 minutes is sufficient, for example, irradiation at 80W for 5 minutes. In addition to obtaining a product having a resin film cured by ultraviolet rays, a product was also created in which a lubricant was simultaneously deposited.In this case, stearamide was deposited at a constant evaporation rate. Regarding the abrasion-resistant magnetic tape of the present invention thus prepared, the still playback life of the VTR tape was measured. The results are shown in Table 2 below.
【表】
上記表１及び表２から明らかなように、本発明
法により作成した耐摩耗性磁気テープの耐摩耗性
は、従来品に比し著しく向上していることが分
る。
（発明の効果）
このように本発明によるときは、紫外線または
電子線硬化型樹脂を、磁気記録体の磁性膜面に直
接又は間接蒸発させ、その末重合の蒸着面に照射
線を照射するようにしたので、熱劣化のない良質
の耐摩耗性の大きい高分子樹脂膜を備えた磁気記
録体を製造することができ、又この照射線硬化型
樹脂の蒸着と共に潤滑剤を蒸着せしめるときは、
長期に亘り油切れのない安定良好な耐摩耗性の更
に向上した耐摩耗性磁気記録体が得られる等の効
果を有する。[Table] As is clear from Tables 1 and 2 above, the wear resistance of the wear-resistant magnetic tape produced by the method of the present invention is significantly improved compared to conventional products. (Effects of the Invention) According to the present invention, ultraviolet rays or electron beam curable resin is directly or indirectly evaporated onto the magnetic film surface of a magnetic recording medium, and the evaporated surface of the polymerized resin is irradiated with radiation. As a result, it is possible to manufacture a magnetic recording body equipped with a high-quality polymeric resin film that does not undergo thermal deterioration and has high wear resistance, and when a lubricant is vapor-deposited along with the vapor-deposition of this radiation-curable resin,
This has the effect of providing a wear-resistant magnetic recording material that is stable over a long period of time without running out of oil and has further improved wear resistance.
第１図及び第２図は夫々本発明方法を実施する
装置の截断側面線図を示す。
１……真空処理容器、３……冷却キヤン、４…
…まき出しローラー、５……まき取りローラー、
７……加熱源容器、８……照射線硬化型樹脂、９
……電子線照射装置、１０……潤滑剤、１１……
光重合開始剤、１２……紫外線照射装置。
1 and 2 each show a cut-away side diagram of an apparatus for carrying out the method of the invention. 1... Vacuum processing container, 3... Cooling can, 4...
...Wind-out roller, 5...Wind-up roller,
7... Heat source container, 8... Radiation curable resin, 9
...Electron beam irradiation device, 10...Lubricant, 11...
Photopolymerization initiator, 12... Ultraviolet irradiation device.
Claims (1)
外線あるいは電子線硬化型樹脂を、蒸着させ、そ
の末重合の蒸着膜面に紫外線あるいは電子線を照
射し硬化せしめることを特徴とする耐摩耗性磁気
記録体の製造法。 ２ 紫外線あるいは電子線硬化型樹脂はモノマー
又はオリゴマーである特許請求の範囲１に記載の
製造法。 ３ 照射線は、紫外線であり、樹脂と同時に光重
合開始剤を蒸着する特許請求の範囲１に記載の製
造法。 ４ 照射線は電子線である特許請求の範囲１に記
載の製造法。 ５ 磁気記録体の表面に紫外線あるいは電子線硬
化型樹脂と紫外線を用いる場合には光重合開始剤
とを蒸着させその末重合の蒸着膜の重合硬化過程
において潤滑剤蒸気を付着させた後、蒸着膜面に
紫外線あるいは電子線を照射し硬化せしめること
を特徴とする磁気記録体の製造法。[Claims] 1. Directly or indirectly depositing an ultraviolet ray or electron beam curable resin on the magnetic film surface of a magnetic recording material, and then irradiating the polymerized evaporated film surface with ultraviolet rays or electron beams to cure it. A method for producing a wear-resistant magnetic recording material characterized by: 2. The manufacturing method according to claim 1, wherein the ultraviolet ray or electron beam curable resin is a monomer or oligomer. 3. The manufacturing method according to claim 1, wherein the irradiation radiation is ultraviolet rays, and the photopolymerization initiator is vapor-deposited at the same time as the resin. 4. The manufacturing method according to claim 1, wherein the irradiation beam is an electron beam. 5 When ultraviolet rays or electron beam curable resin and ultraviolet rays are used, a photopolymerization initiator is vapor-deposited on the surface of the magnetic recording medium, and lubricant vapor is deposited during the polymerization and curing process of the vapor-deposited film, followed by vapor deposition. A method of manufacturing a magnetic recording material, which is characterized by curing the film surface by irradiating it with ultraviolet light or electron beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18283884A JPS6161233A (en) | 1984-09-03 | 1984-09-03 | Production of wear resistant magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18283884A JPS6161233A (en) | 1984-09-03 | 1984-09-03 | Production of wear resistant magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6161233A JPS6161233A (en) | 1986-03-29 |
| JPH0338652B2 true JPH0338652B2 (en) | 1991-06-11 |
Family
ID=16125342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18283884A Granted JPS6161233A (en) | 1984-09-03 | 1984-09-03 | Production of wear resistant magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6161233A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63121120A (en) * | 1986-11-10 | 1988-05-25 | Matsushita Electric Ind Co Ltd | Production of magnetic recording medium |
| JP2507531B2 (en) * | 1988-04-18 | 1996-06-12 | 株式会社日立製作所 | Method of manufacturing magnetic recording medium |
-
1984
- 1984-09-03 JP JP18283884A patent/JPS6161233A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6161233A (en) | 1986-03-29 |
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