JPH04195725A - Manufacture of magnetic recording medium - Google Patents
Manufacture of magnetic recording mediumInfo
- Publication number
- JPH04195725A JPH04195725A JP32359990A JP32359990A JPH04195725A JP H04195725 A JPH04195725 A JP H04195725A JP 32359990 A JP32359990 A JP 32359990A JP 32359990 A JP32359990 A JP 32359990A JP H04195725 A JPH04195725 A JP H04195725A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic recording
- polishing
- blade
- roll
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000005498 polishing Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 abstract description 3
- 230000004224 protection Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Landscapes
- 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、磁気記録媒体の表面に存在する突起物を除去
する研磨工程を含む磁気記録媒体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a magnetic recording medium that includes a polishing step for removing protrusions present on the surface of the magnetic recording medium.
従来の技術
磁気記録媒体は、その製造工程の中で混入したごみおよ
び磁性層やバックコートの構成材が凝集することによっ
てその表面に突起が発生する場合がある。この突起はビ
デオテープレコーダー等にその磁気記録媒体を使用する
場合、ドロ、プアウトの原因となり、画面上で信号の欠
落となってあられれる。またデジタル記録装置の場合、
バースト誤りとなってしまう。したがってこのような突
起を除去するために、従来は第4図に示すような鋭利な
ブレードlを磁気記録媒体2の表面に押し当てて走行さ
せることによって突起を除去する方法が一般的に行われ
ている。なお、図において3は供給ロール、4は巻き取
りロールである。Conventional magnetic recording media may have protrusions on their surfaces due to agglomeration of dust mixed in during the manufacturing process and constituent materials of the magnetic layer and back coat. When the magnetic recording medium is used in a video tape recorder or the like, these protrusions cause dropouts and dropouts, resulting in signal dropouts on the screen. Also, in the case of digital recording devices,
This will result in a burst error. Therefore, in order to remove such protrusions, a conventional method has generally been used in which the protrusions are removed by pressing a sharp blade l against the surface of the magnetic recording medium 2 and running it as shown in FIG. ing. In addition, in the figure, 3 is a supply roll, and 4 is a take-up roll.
発明が解決しようとする課題
しかしながら上記従来の製造方法では、研磨前に磁気記
録媒体2がロール状に巻き取られている場合、磁気記録
媒体2の表面に突起があるとそれが磁気記録媒体2の他
の部分にその形状が転写される。この例を第5図に示す
。供給ロール3の中心から第n番目の磁気記録媒体2の
表面に突起5がある場合、その外側に巻かれたn+1.
n+2゜n+3.・・・・・・、n+n番目の磁気記録
媒体2の表面二こは高さがこの突起5の高さより低く、
幅は突起5より大きくなってその形状が転写されて凸部
6n4−1.6n↓2.6n埼−3,・・・・・・、6
n+nが生し5る。このため、一つの突起5が第5同に
示すように供給ロール3の外側に向かってかなりの範囲
で転写されてし、よう。したがって、突起5がある磁気
記録媒体2の部分だけでなくそれ以外の磁気記録媒体の
磁性面に生じた形状転写によって、記録信号の欠落が発
生するという課がかある。また上記のような形状転写が
生し、でいる状態で磁気記録媒体2の表面をブレードI
Lこよって研磨すると、その表面に存在する突起5は除
去できるが、形状転写によって磁気記録媒体2の他の部
分に発生して白部分6n+1.6n+2.6n+3.・
・・・・、6n+nは除去することができず、研磨後も
形状転写がそのまま残ってしまうため、信号欠落を十分
改善することができないという課題がある。Problems to be Solved by the Invention However, in the conventional manufacturing method described above, when the magnetic recording medium 2 is wound up into a roll before polishing, if there is a protrusion on the surface of the magnetic recording medium 2, the protrusion is removed from the magnetic recording medium 2. The shape is transferred to other parts of the image. An example of this is shown in FIG. When there is a protrusion 5 on the surface of the n-th magnetic recording medium 2 from the center of the supply roll 3, the n+1.
n+2゜n+3. ..., the height of two surfaces of the n+nth magnetic recording medium 2 is lower than the height of this protrusion 5,
The width becomes larger than the protrusion 5, and its shape is transferred to form the protrusion 6n4-1.6n↓2.6n-3,...,6
n+n comes into being. For this reason, one protrusion 5 is transferred to a considerable extent toward the outside of the supply roll 3, as shown in the fifth figure. Therefore, there is a problem in that recording signal loss occurs due to shape transfer occurring not only on the portion of the magnetic recording medium 2 where the protrusion 5 is located, but also on the magnetic surface of the other magnetic recording medium. In addition, the surface of the magnetic recording medium 2 is touched by the blade I while the shape transfer as described above occurs.
By polishing with L, the protrusions 5 existing on the surface can be removed, but due to shape transfer, they are generated in other parts of the magnetic recording medium 2, resulting in white parts 6n+1.6n+2.6n+3.・
. . , 6n+n cannot be removed and the transferred shape remains as it is even after polishing, so there is a problem that signal loss cannot be sufficiently improved.
本発明は上記課題を解決するものであり、信号の欠落が
少ない優れた磁気記録媒体を折供することを目的とする
ものである。The present invention is intended to solve the above problems, and aims to provide an excellent magnetic recording medium with fewer signal dropouts.
!lBを解決するための手段
本発明は上記目的を達成するために、供給ロールから引
き出された磁気記録媒体を加熱する工程と、磁気記録媒
体の表面を研磨する工程を経て、巻き取りロールに巻き
取るものである。! Means for Solving IB In order to achieve the above object, the present invention has the following steps: heating a magnetic recording medium pulled out from a supply roll, and polishing the surface of the magnetic recording medium, and then winding it onto a take-up roll. It is something to take.
作用
したがって本発明によりば、&iTt記録媒体を加熱す
る工程で、形状転写によって生じた磁気記録媒体内部に
蓄積した応力を緩和し、形状転写をもとに復帰させて除
去することができ、さらにその磁気記録媒体の表面を研
磨する工程によって突起が除去されるため、信号欠落な
どを発生しない磁気記録媒体を提供することが可能とな
る。Therefore, according to the present invention, in the step of heating the &iTt recording medium, the stress accumulated inside the magnetic recording medium caused by the shape transfer can be relieved, the stress can be restored to the shape transfer, and the stress can be removed. Since the protrusions are removed by the step of polishing the surface of the magnetic recording medium, it is possible to provide a magnetic recording medium that does not cause signal dropouts.
実施例
以下、本発明の一実施例の磁気記録媒体の製造方法につ
いて、第1図〜第3図とともに第4図。EXAMPLE Below, FIG. 4 together with FIGS. 1 to 3 shows a method of manufacturing a magnetic recording medium according to an example of the present invention.
第5図と同一部分については同一番号を付して詳しい説
明を省略し、相違する点について説明する。Parts that are the same as those in FIG. 5 are given the same numbers, detailed explanations are omitted, and differences will be explained.
第1回は本発明の第1の実施例を示す図であり、磁気記
録媒体2は鋭利なブレード1によって表面が研磨される
と同時に、磁気記録媒体2のプレート1の摺接面と反対
側の面から加熱ランプ7によ−1て加熱される。磁気記
録媒体2を加熱ランプ7ご加熱すると、形状転写によっ
て磁気記録媒体2の内部に蓄積した応力が緩和され、転
写された形状がちとに復帰し、凸部6n+1.6n+2
゜6n+3.・・・・・・、6n+nを除去することが
できる。これと同時にプレート1によって磁気記録媒体
2の表面研磨を行うことにより、磁気記録媒体2の表面
の突起5を除去できる。したがって、これらの工程の後
に、磁気記録媒体2を巻き取りロール4に巻き取っても
、突起5が除去されているため、その表面に再び形状転
写を生しさせることがない6Lまたがって信号の欠落が
少ない磁気記録媒体2を得ることができる。The first diagram shows the first embodiment of the present invention, in which the surface of the magnetic recording medium 2 is polished by a sharp blade 1, and at the same time the surface of the magnetic recording medium 2 is polished on the opposite side of the sliding surface of the plate 1. It is heated from the surface by the heating lamp 7 -1. When the magnetic recording medium 2 is heated by the heating lamp 7, the stress accumulated inside the magnetic recording medium 2 due to the shape transfer is relaxed, the transferred shape returns to its original shape, and the convex portion 6n+1.6n+2
゜6n+3. ..., 6n+n can be removed. At the same time, by polishing the surface of the magnetic recording medium 2 using the plate 1, the projections 5 on the surface of the magnetic recording medium 2 can be removed. Therefore, even if the magnetic recording medium 2 is wound onto the take-up roll 4 after these steps, since the protrusions 5 have been removed, no shape transfer will occur on the surface again. A magnetic recording medium 2 with fewer defects can be obtained.
この第1聞は、磁気記録媒体2の片側の面のみ研磨する
場合について示したものであるが、磁気記録媒体2の反
対側の面も巻き取りロール4に巻き取られるまでに研磨
した方が望ましい。This first example shows the case where only one side of the magnetic recording medium 2 is polished, but it is better to polish the opposite side of the magnetic recording medium 2 before it is wound onto the take-up roll 4. desirable.
第2回は本発明の第2の実施例を示す図であり、本吏施
例では磁気記録媒体2の表面の研磨に第1の実施例にお
けるブレードlに代えて1iIII磨テープ8を用いた
もので、磁気記録媒体2と研磨テープ8を摺接させるた
めに圧縮空気を吹き出し5ノズル9より研磨テープ8側
と磁気記録媒体2の研磨面と反対側から吹き付けている
。また磁気記録媒体2の加熱は吹き出しノズル9から排
出する空気をあらかしめ加熱しておくことQこよって行
うことができる0本実施例によれば、研摩テープ8を常
に供給しながら磁気記録媒体2を研磨することができる
ため、磁気記録媒体2の研磨を安定し2て行うことがで
きる。The second example is a diagram showing a second embodiment of the present invention, in which a 1iIII polishing tape 8 was used in place of the blade l in the first embodiment to polish the surface of the magnetic recording medium 2. In order to bring the magnetic recording medium 2 and the polishing tape 8 into sliding contact, compressed air is blown from five nozzles 9 from the side of the polishing tape 8 and the side opposite to the polishing surface of the magnetic recording medium 2. Further, heating of the magnetic recording medium 2 can be carried out by preheating the air discharged from the blow nozzle 9.According to this embodiment, the magnetic recording medium 2 is heated while the abrasive tape 8 is constantly being supplied. Therefore, the magnetic recording medium 2 can be polished stably.
第3回は本発明の第3の実施例を示す圓で、磁気記録媒
体2に対するプレー1′1の摺接位宜と加熱ランプ7の
加熱位置を変えた場合である。形状転写が生している状
態で磁気記録媒体2の表面を研磨すると、凸部6n+1
,6n+2.6n+3゜・・・・・・、6n+nの表面
を損傷する場合があり、したがって加熱ランプ7で形状
転写を除去した後にブレード1によって研磨を行うこと
により突起5のみを除去することができる。The third example shows a third embodiment of the present invention, in which the sliding contact position of the plate 1'1 with respect to the magnetic recording medium 2 and the heating position of the heating lamp 7 are changed. When the surface of the magnetic recording medium 2 is polished with shape transfer occurring, convex portions 6n+1
, 6n+2.6n+3°..., 6n+n may damage the surface. Therefore, only the protrusion 5 can be removed by removing the shape transfer with the heat lamp 7 and then polishing with the blade 1. .
このように上記実施例によれば、磁気記録媒体2の製造
工程中に加熱ランプ7を設けていることにより突起5に
よって形状転写された凸部6n+1.6n+2.6n+
3.・・・・・・、6n+nをもとに復帰させることが
でき、信号欠落の少ない磁気記録媒体2を得ることがで
きる。In this way, according to the above embodiment, by providing the heating lamp 7 during the manufacturing process of the magnetic recording medium 2, the convex portion 6n+1.6n+2.6n+ whose shape is transferred by the protrusion 5 is
3. . . . can be restored based on 6n+n, and a magnetic recording medium 2 with fewer signal dropouts can be obtained.
本発明の効果
本発明は上記実施例より明らかなように、磁気記録媒体
を加熱することによって磁気記録媒体内部に蓄積された
応力が緩和され、形状転写を除去することができる。ま
たこの加熱工程と同時またはその後に磁気記録媒体の表
面を研磨することにより、形状転写による凹凸が除去さ
れた状態で磁気記録媒体の表面の突起を除去できる。し
たがってこれらの工程の後に、磁気記録媒体を巻き取り
ロールに巻き取れば、突起が除去されているため、磁気
記録媒体の表面に再び形状転写を生しさせることがなく
、信号の欠落が少ない磁気記録媒体を得ることができる
。Effects of the Present Invention As is clear from the above embodiments, the present invention can relieve the stress accumulated inside the magnetic recording medium by heating the magnetic recording medium, thereby eliminating shape transfer. Furthermore, by polishing the surface of the magnetic recording medium at the same time as or after this heating step, the protrusions on the surface of the magnetic recording medium can be removed while the unevenness caused by shape transfer is removed. Therefore, when the magnetic recording medium is wound onto a take-up roll after these steps, since the protrusions have been removed, the shape transfer will not occur again on the surface of the magnetic recording medium, and the magnetic recording medium will have less signal loss. A recording medium can be obtained.
第1図は本発明の第1の実施例における磁気記録媒体の
製造方法を示す概略図、第2図は本発明の第2の実施例
における同製造方法を示す概略図、第3図は本発明の第
3の実施例における同製造方法を示す概略図、第4図は
従来の磁気記録媒体の製造方法を示す概略図、第5図は
磁気記録媒体の表面に突起がある場合に形状転写が発生
する状態を示す磁気記録媒体の要部断面図である。
1・・・・・・ブレード、2・・・・・・磁気記録媒体
、3・・・・・・供給ロール、4・・・・・・巻き取り
ロール、7・・・・・・加熱ランプ。
代理人の氏名 弁理士小鍜治明 ほか2名第1図
f−・−ゴL−y
7−ね−艷竹汗俤
3−4f、着FD−1t
4・−−1111シリロー!(
第2図
!4図
D−IL9ν七Iす
D−ルll+配゛FIG. 1 is a schematic diagram showing the manufacturing method of a magnetic recording medium in the first embodiment of the present invention, FIG. 2 is a schematic diagram showing the same manufacturing method in the second embodiment of the invention, and FIG. A schematic diagram showing the manufacturing method according to the third embodiment of the invention, FIG. 4 is a schematic diagram showing the conventional manufacturing method of a magnetic recording medium, and FIG. 5 shows shape transfer when there is a projection on the surface of the magnetic recording medium. FIG. 2 is a cross-sectional view of a main part of a magnetic recording medium showing a state in which this occurs. DESCRIPTION OF SYMBOLS 1... Blade, 2... Magnetic recording medium, 3... Supply roll, 4... Winding roll, 7... Heat lamp . Name of agent: Patent attorney Haruaki Ogata and two others Figure 1
f-・-go L-y 7-ne-艷take Sweat 3-4f, wear FD-1t 4・--1111 Shirilow! (Figure 2! Figure 4 D-IL9ν7I-Lll+Distribution
Claims (2)
の磁気記録媒体を加熱する工程とその磁気記録媒体の表
面を研磨する工程を経て巻き取りロールに巻き取られる
ことを特徴とする磁気記録媒体の製造方法。(1) A magnetic recording medium characterized in that the magnetic recording medium pulled out from a supply roll is wound up on a take-up roll through a process of heating the magnetic recording medium and a process of polishing the surface of the magnetic recording medium. manufacturing method.
を同時に行うことを特徴とする請求項1記載の磁気記録
媒体の製造方法。(2) The method for manufacturing a magnetic recording medium according to claim 1, characterized in that heating the magnetic recording medium and polishing the surface of the magnetic recording medium are performed simultaneously.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32359990A JPH04195725A (en) | 1990-11-26 | 1990-11-26 | Manufacture of magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32359990A JPH04195725A (en) | 1990-11-26 | 1990-11-26 | Manufacture of magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04195725A true JPH04195725A (en) | 1992-07-15 |
Family
ID=18156514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP32359990A Pending JPH04195725A (en) | 1990-11-26 | 1990-11-26 | Manufacture of magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04195725A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006286148A (en) * | 2005-04-04 | 2006-10-19 | Fuji Photo Film Co Ltd | Tape-like recording medium and its manufacturing method |
-
1990
- 1990-11-26 JP JP32359990A patent/JPH04195725A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006286148A (en) * | 2005-04-04 | 2006-10-19 | Fuji Photo Film Co Ltd | Tape-like recording medium and its manufacturing method |
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