JPS6020809B2 - Magnetic film and its manufacturing method - Google Patents
Magnetic film and its manufacturing methodInfo
- Publication number
- JPS6020809B2 JPS6020809B2 JP7188876A JP7188876A JPS6020809B2 JP S6020809 B2 JPS6020809 B2 JP S6020809B2 JP 7188876 A JP7188876 A JP 7188876A JP 7188876 A JP7188876 A JP 7188876A JP S6020809 B2 JPS6020809 B2 JP S6020809B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- magnetic
- thin film
- magnetic thin
- 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
- 230000005291 magnetic effect Effects 0.000 title claims description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000010408 film Substances 0.000 claims description 25
- 239000010409 thin film Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 10
- 239000002985 plastic film Substances 0.000 claims description 7
- 229920006255 plastic film Polymers 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007733 ion plating Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229940081735 acetylcellulose Drugs 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】
本発明は、プラスチックフィルム上に磁性体の薄膜を形
成させた磁性薄膜フィルムを、高分子材料を溶解した溶
剤中に通過させることにより、フィルム全体を被覆して
、磁性フィルムの耐緑性の向上およびすべり性の改善を
図ろうとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention allows a magnetic thin film in which a thin magnetic film is formed on a plastic film to pass through a solvent in which a polymeric material is dissolved, thereby coating the entire film and making it magnetic. The aim is to improve the green resistance and slipperiness of the film.
従来から録音、緑画等の記録用媒体として、磁気テープ
が広く用いられている。Magnetic tape has been widely used as a recording medium for recording, green paintings, etc.
これらは、主にｙ−Ｆｅ２０３あるいはＣの２の微４・
磁性粒子をバインダー中に混合し、基板フィルム上に塗
布したものである。この種の磁気テープでの大きな課題
の一つに、記録密度の向上があげられる。一般に記録密
度は、記録波長、トラック幅、記録媒体厚に依存するが
、これらについては現在までたゆみなく検討改良され向
上してきたが、現在では限界に到達しようとしている。
しかし、記録密度の向上は、記録媒体を小型化できるこ
と、あるいは大容量の記録ができること、長時間の録音
、緑画ができるということで、電子計算機、ビデオ、カ
セット等では現在強く望まれている。一方、近年、記録
密度の向上という点から、記録媒体陣を薄くすることが
可能で、飛躍的に記録密度を向上させることができる磁
性薄膜型のフィルムが検討されている。These are mainly y-Fe203 or C2 micro4.
Magnetic particles are mixed into a binder and applied onto a substrate film. One of the major challenges for this type of magnetic tape is to improve recording density. In general, recording density depends on the recording wavelength, track width, and recording medium thickness, and although these have been continuously studied and improved to date, they are now reaching their limits.
However, improvements in recording density are currently strongly desired in electronic computers, videos, cassettes, etc. because it allows the recording medium to be made smaller, allows large-capacity recording, and allows for long-term recording and green screen recording. . On the other hand, in recent years, from the viewpoint of improving recording density, studies have been conducted on magnetic thin film type films that can make the recording medium thinner and dramatically improve the recording density.
これは、プラスチックフィルムの基板上に、真空蒸着法
、イオンプレーティング法あるいは化学メッキ法等によ
り数百〜数千Ａの磁性薄膜を形成したものである。しか
るに、これらは単にプラスチックフィルム上に磁性薄膜
を形成したのみのものでは、各種寿命試験、特に耐湿寿
命試験において検討した結果、磁性薄膜が酸化し、酸化
物が形成されることが判明した。また海岸近くでは、塩
害による酸化のため同様のことが起ると考えられる。そ
して酸化により生じた酸化物は酸化されていないものに
比べフィルムとの接着強度が低下して、走行中にヘッド
との接触によりフィルムより剥離し、録音、銭画特性を
極めて低下させ、最悪の場合は録音不能となる。日本の
ような多湿の気候では、この酸化剥離は本質的な重要な
問題である。本発明は、記録密度の点で優れている磁性
薄膜フィルムの実用上問題となっている酸化剥離を解決
するもので、以下にその一実施例を図面ととも夕に説明
する。This is a magnetic thin film of several hundred to several thousand amps formed on a plastic film substrate by vacuum evaporation, ion plating, chemical plating, or the like. However, when these are simply formed with a magnetic thin film on a plastic film, various life tests, especially moisture resistance life tests, have revealed that the magnetic thin film oxidizes and forms oxides. A similar phenomenon is thought to occur near the coast due to oxidation caused by salt damage. The oxides produced by oxidation have a lower adhesion strength to the film than those that have not been oxidized, and will peel off from the film when it comes into contact with the head during running, extremely reducing the recording and image characteristics. In this case, recording will not be possible. In a humid climate like Japan, this oxidation peeling is an essential problem. The present invention is intended to solve the problem of oxidation peeling which is a practical problem in magnetic thin films which are excellent in terms of recording density, and one embodiment thereof will be explained below with reference to the drawings.
第１図は、本発明フィルムの製作過程を示す図で、第２
図Ａ，Ｂ，Ｃは各過程におけるフィルムの状態を示す図
である。Figure 1 is a diagram showing the manufacturing process of the film of the present invention, and Figure 2 shows the process of manufacturing the film of the present invention.
Figures A, B, and C are diagrams showing the state of the film in each process.
なお、第１図において、磁性薄膜作製過程は省略してい
る。磁性薄膜フィルム１は例えばポリエステル等の広幅
のプラスチックフィルム基板１′上に、真空黍着法、イ
オンプレーテイング法、または化学メッキ法等により、
Ｎｉ．Ｃｏ，Ｆｅ等の強磁性薄膜ｒを単体で、あるいは
合金の形で形成させたもので、第２図Ａで示されるもの
である。これは最初送り出しローラ２に巻かれている。
そして送り出しローラ２より出た磁性薄膜フィルム１は
、複数個のスリット刃３で所定の幅のフィルムにスリッ
トされる。例えばオープンリール用では６．３側幅に、
ビデオカセット用では１２．７肋幅に、カセット用では
３．８肋幅にスリットされる。スリットされた状態を第
２図Ｂに示す。次にスリットされた磁性薄膜フィルム１
は、高分子材料を溶解した溶剤４中を通過する。In addition, in FIG. 1, the magnetic thin film manufacturing process is omitted. The magnetic thin film 1 is coated on a wide plastic film substrate 1' made of polyester or the like by a vacuum coating method, an ion plating method, a chemical plating method, etc.
Ni. A ferromagnetic thin film r made of Co, Fe, etc. is formed singly or in the form of an alloy, as shown in FIG. 2A. This is initially wound around the delivery roller 2.
The magnetic thin film 1 discharged from the feed roller 2 is slit by a plurality of slit blades 3 into films of a predetermined width. For example, for open reel use, the side width is 6.3,
For video cassettes, it is slit to 12.7 rib widths, and for cassettes, it is slit to 3.8 rib widths. The slit state is shown in FIG. 2B. Next, the slit magnetic thin film 1
passes through a solvent 4 in which a polymeric material is dissolved.
通過後、スリットされた磁性薄膜フィルム１の周囲には
高分子材料を溶解した溶剤４が付着し、被覆される。溶
剤に溶解させる高分子材料は、薄くても耐緑性、接着性
、摩耗性の優れたものあるいは巻取時に巻取りが容易と
なるようすべり性の良いものが要求され、１種、場合に
よっては数種からなっている。例えば、アクリル樹脂、
アセチルセルロース、ポリカーポネイト、ェポキシ樹脂
等があげられる。また、高分子材料を溶かす溶剤として
は、溶かす材料によって異なるが、アセトン、キシロー
ル、ジクロールメタン等があげられる。付着層の厚さは
、溶剤の濃度、薄過時間等により制御できるが、ピンホ
ールがなくて耐質性を維持できる限りにおいて均一で薄
ければ薄い程良いことは言うまでもない。次に高分子材
料を溶解している溶剤の付着したフィルム１は、乾燥室
５に入り、ここでは溶剤が蒸発し、後には高分子材料の
膜４′が形成され、高分子材料がフィルムの全面（全外
周）を被覆する。After passing through, the solvent 4 in which the polymeric material is dissolved adheres to the periphery of the slit magnetic thin film 1 and is coated therewith. The polymer material to be dissolved in the solvent is required to have excellent green resistance, adhesiveness, and abrasion resistance even if it is thin, or to have good slipperiness so that it can be easily wound. is made up of several species. For example, acrylic resin,
Examples include acetyl cellulose, polycarbonate, and epoxy resin. Further, examples of the solvent for dissolving the polymeric material include acetone, xylol, dichloromethane, etc., although it varies depending on the material to be dissolved. The thickness of the deposited layer can be controlled by the concentration of the solvent, the dilution time, etc., but it goes without saying that the more uniform and thinner it is, the better, as long as there are no pinholes and quality resistance can be maintained. Next, the film 1 to which the solvent dissolving the polymeric material has adhered enters the drying chamber 5, where the solvent evaporates and a film 4' of the polymeric material is formed, and the polymeric material is removed from the film. Cover the entire surface (entire circumference).
この状態を第２図Ｃに示す。この時ピンホールができな
いように乾燥条件を設定しなければならない。次に乾燥
後、仕上ったフィルム１は、巻取りローラ６に巻かれ、
最終的にはリールに巻かれる。次に本発明品と従来品の
比較を示す。This state is shown in FIG. 2C. At this time, drying conditions must be set to prevent pinholes from forming. Next, after drying, the finished film 1 is wound around a take-up roller 6,
Eventually it winds up on a reel. Next, a comparison between the product of the present invention and the conventional product will be shown.
ポリエステルフィルム上に酸素雰囲気中
（球１０‐５のｒｒ）でＦｅを真空蒸着させた従来品と
、さらにその上を高分子材料でおおつた本発明品とを、
５０℃、１００％ＲＨの雰囲気に放置しておき、付着強
度の経時変化を調べた結果、前者のものでは、５ｑ時間
前後で酸化剥離が見られたが、後者では約５００時間経
過した現在においても、変化が見られず、その効果が歴
然としている。A conventional product in which Fe was vacuum-deposited on a polyester film in an oxygen atmosphere (sphere 10-5 rr), and an inventive product in which Fe was further covered with a polymeric material.
The former was left in an atmosphere of 50°C and 100% RH, and the change in adhesion strength over time was investigated. The former showed oxidation peeling after about 5 q hours, but the latter showed peeling after about 500 hours. However, no change was observed, and the effect is clear.
これらの試料を顕微鏡で詳細に観察してみたところ、従
来のものは、ほとんど酸化剥離が磁性層端面部に集中し
ており、両端部から劣化が進行しているのがわかった。When these samples were closely observed under a microscope, it was found that in the conventional samples, most of the oxidation peeling was concentrated at the end faces of the magnetic layer, and deterioration progressed from both ends.
一方、本発明品では、両端部が高分子材料により保護さ
れているため、剥離が全く観察されなかった。また磁性
層上の被膜は、耐湿性、すべり性を一層向上させるもの
であり、さらに袋面上の被覆は、裏面のすべり性を改善
させる効果を有するものである。なお、本磁性フィルム
を記録媒体としてみた場合、従来の塗布型の記録媒体厚
は、音声１０〜１５仏、ビデオ４〜１０山であったが、
本発明からなる高分子被覆膜厚を加算した記録媒体厚は
１〜２ムと薄いものであり、厚くすることなく、耐湿性
の向上を図ることができたものである。On the other hand, in the product of the present invention, since both ends were protected by the polymeric material, no peeling was observed at all. Furthermore, the coating on the magnetic layer further improves the moisture resistance and slip properties, and the coating on the bag surface has the effect of improving the slip properties on the back surface. When this magnetic film is used as a recording medium, the thickness of conventional coated recording media is 10 to 15 mm thick for audio and 4 to 10 mm thick for video.
The thickness of the recording medium including the thickness of the polymer coating film of the present invention is as thin as 1 to 2 μm, and the moisture resistance can be improved without increasing the thickness.
なお、上記における記録媒体厚は、従来の塗布型ではバ
インダー層の厚さ、本発明では磁性薄膜層の厚さ十高分
子被覆膜厚で換算比較している。Note that the recording medium thickness in the above is the thickness of the binder layer in the conventional coating type, and in the present invention, the thickness of the magnetic thin film layer 10 the thickness of the polymer coating film.
以上述べたように本発明は、磁性薄膜フィルムを高分子
材料で被覆し、耐湿性、すべり性を向上させることがで
きるものであり、したがって酸化剥離がなく、長寿命の
磁性フィルムを提供することができるものである。なお
、高分子材料を被覆することにより多少の出力損失はあ
るが、実用上は差しつかえなかった。As described above, the present invention is to coat a magnetic thin film with a polymer material to improve moisture resistance and slipperiness, and therefore to provide a long-life magnetic film that is free from oxidative peeling. It is something that can be done. Although there was some output loss due to coating with the polymer material, it was not a problem for practical use.
第１図は本発明による磁性フィルムの製造方法を実施す
るために使用する装置の概略構成図、第２図Ａ，Ｂ，Ｃ
は本発明による磁性フィルムの製造順序を示すフィルム
の斜視図である。
１……磁性薄膜を有するプラスチックフィルム、４・・
・・・・溶剤、４′・・・・・・高分子材料膜、５・・
・・・・乾燥室。
第１図
第２図Fig. 1 is a schematic diagram of the apparatus used to carry out the method for producing a magnetic film according to the present invention, and Fig. 2 A, B, C
1 is a perspective view of a film showing the manufacturing sequence of a magnetic film according to the present invention. 1...Plastic film having a magnetic thin film, 4...
...Solvent, 4'...Polymer material membrane, 5...
...Drying room. Figure 1 Figure 2
Claims (1)
外周を高分子材料で被覆した磁性フイルム。 ２ 表面に磁性薄膜を有するプラスチツクフイルムを１
種または数種の高分子材料を溶解した溶剤中を通過させ
た後、乾燥させることを特徴とする磁性フイルムの製造
方法。[Scope of Claims] 1. A magnetic film in which the entire outer periphery of a plastic film having a magnetic thin film on its surface is coated with a polymeric material. 2 Place a plastic film with a magnetic thin film on its surface.
A method for producing a magnetic film, which comprises passing through a solvent in which one or more polymeric materials are dissolved, and then drying the film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7188876A JPS6020809B2 (en) | 1976-06-17 | 1976-06-17 | Magnetic film and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7188876A JPS6020809B2 (en) | 1976-06-17 | 1976-06-17 | Magnetic film and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52153707A JPS52153707A (en) | 1977-12-21 |
| JPS6020809B2 true JPS6020809B2 (en) | 1985-05-23 |
Family
ID=13473515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7188876A Expired JPS6020809B2 (en) | 1976-06-17 | 1976-06-17 | Magnetic film and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6020809B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0242508U (en) * | 1988-09-16 | 1990-03-23 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60119634A (en) * | 1983-11-30 | 1985-06-27 | Hitachi Condenser Co Ltd | Manufacture of magnetic recording medium |
| JPH07101494B2 (en) * | 1984-09-18 | 1995-11-01 | 松下電器産業株式会社 | Metal thin film magnetic recording medium |
-
1976
- 1976-06-17 JP JP7188876A patent/JPS6020809B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0242508U (en) * | 1988-09-16 | 1990-03-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52153707A (en) | 1977-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0133353B1 (en) | Magnetic recording medium and manufacturing method thereof | |
| JPS6020809B2 (en) | Magnetic film and its manufacturing method | |
| US3791608A (en) | Friction sheet for a magnetic tape recording cassette | |
| JPS6148128A (en) | Manufacture of magnetic recording medium | |
| JPH0473214B2 (en) | ||
| JP2554277B2 (en) | Magnetic recording media | |
| US4628009A (en) | Magnetic recording medium | |
| JPS5837615B2 (en) | magnetic recording medium | |
| JPS59132421A (en) | Magnetic recording medium | |
| KR0183048B1 (en) | Magnetic recording media and manufacturing method thereof | |
| JPS6228918A (en) | Magnetic recording tape | |
| JP2629847B2 (en) | Manufacturing method of magnetic recording medium | |
| JP2002319122A (en) | Support for magnetic recording medium and magnetic recording tape | |
| JPH06168444A (en) | Production of magnetic recording medium | |
| JPH01264632A (en) | Method and apparatus for producing magnetic recording medium | |
| JPS618736A (en) | Manufacture of magnetic recording medium | |
| JPS5891524A (en) | Magnetic recording medium | |
| JPS60131632A (en) | Manufacture of magnetic recording medium | |
| JPS6148127A (en) | Manufacture of magnetic recording medium | |
| JPH0740359B2 (en) | Method of manufacturing magnetic recording medium | |
| JPS5891526A (en) | Magnetic recording medium | |
| JPH06101109B2 (en) | Magnetic recording medium | |
| JPS59175030A (en) | Production of magnetic recording medium | |
| JPH044648B2 (en) | ||
| JPS6226638A (en) | Production of magnetic recording medium |