JPH0223524A - Method and apparatus for producing magnetic recording medium - Google Patents
Method and apparatus for producing magnetic recording mediumInfo
- Publication number
- JPH0223524A JPH0223524A JP17424388A JP17424388A JPH0223524A JP H0223524 A JPH0223524 A JP H0223524A JP 17424388 A JP17424388 A JP 17424388A JP 17424388 A JP17424388 A JP 17424388A JP H0223524 A JPH0223524 A JP H0223524A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- substrate
- poles
- film
- magnets
- 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
- 238000000034 method Methods 0.000 title description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 239000006247 magnetic powder Substances 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 14
- 230000005415 magnetization Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000003973 paint Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 abstract description 5
- 239000000843 powder Substances 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- -1 isocyanate compounds Chemical class 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000004804 winding Methods 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〕
この発明は磁気記録媒体の製造方法およびその装置に関
し、さらに詳しくは、磁性粉末の配向性が良好で電気的
特性に優れた磁気記録媒体の製造方法およびその装置に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for manufacturing a magnetic recording medium, and more particularly, to a method for manufacturing a magnetic recording medium, and more particularly, to a method for manufacturing a magnetic recording medium, and more specifically, a method for manufacturing a magnetic recording medium having good orientation of magnetic powder and excellent electrical properties. The present invention relates to a manufacturing method and an apparatus thereof.
一般に磁気テープなどの磁気記録媒体は、第３図に示す
ように、繰り出しロール１より繰り出されるベースフィ
ルム２を、一定速度で走行させながら、リバースロール
、グラビアロールなどの塗工機１０で磁性塗料を塗布し
、その塗膜４が未乾燥状態にある間に、２個のＮ−Ｎ対
向磁石あるいはＳ−８対向磁石で構成された磁場配向装
置１１に導入出させて、磁性塗膜４中の磁性粉末粒子の
磁化容易軸を、ベースフィルム２の走行方向（長手方向
）ａに沿うように配向させ、その後乾燥機５に導通して
完全に乾燥、硬化させたのち、巻き取りロール８に巻き
取る方法でつくられている。Generally, magnetic recording media such as magnetic tapes are manufactured using a coating machine 10 such as a reverse roll or a gravure roll while a base film 2 fed out from a feed roll 1 is run at a constant speed and coated with magnetic coating as shown in FIG. is applied, and while the coating film 4 is in an undried state, the magnetic field orientation device 11 composed of two N-N facing magnets or S-8 facing magnets is introduced into the magnetic coating film 4. The axis of easy magnetization of the magnetic powder particles is oriented along the running direction (longitudinal direction) a of the base film 2, and then the dryer 5 is connected to the dryer 5 to completely dry and harden. It is made by rolling it up.
（特公昭３４−２５３６号）
〔発明が解決しようとする課題〕
ところが、この方法では２個のＮ−Ｎ対向磁石あるいは
Ｓ−３対向磁石で構成された磁場配向装置１１でもって
、未乾燥状態にある磁性塗膜に、磁界を瞬時に作用させ
、磁性塗膜が乾燥するまで作用させずに磁性塗膜中の磁
性粉末粒子を配向させているため、充分な配向が行われ
ず、さらに未乾燥の状態で磁性塗膜が磁界外に導出され
るため、機械的振動や結合剤樹脂の弾性緩和などの外的
擾乱によって、−旦ベースフイルムの走行方向に配向さ
れた磁性粉末粒子の配列が乱され、さらに乾燥過程での
結合剤樹脂の収縮に伴って生ずる外力によっても磁性粉
末粒子の方向性が乱されてしまうという難点がある。(Japanese Patent Publication No. 34-2536) [Problems to be Solved by the Invention] However, in this method, the magnetic field orientation device 11 composed of two N-N facing magnets or S-3 facing magnets is used to prevent the undried condition. Because the magnetic field is instantaneously applied to the magnetic coating film and the magnetic powder particles in the magnetic coating film are oriented without being applied until the magnetic coating film dries, sufficient orientation is not achieved, and furthermore, the magnetic powder particles in the magnetic coating film are not dried. Since the magnetic coating film is led out of the magnetic field in the state of Furthermore, there is a problem in that the orientation of the magnetic powder particles is disturbed due to external force caused by shrinkage of the binder resin during the drying process.
この発明はかかる問題を克服するため鋭意検討を行った
結果なされたもので、基体上に磁性塗料を塗布し、次い
で、基体上の磁性塗膜が流動性を有する間に、２個以上
の永久磁石をＮ−３極が基体の走行方向と平行でかつ異
極同士が隣接するように配列した磁界中に基体を導入し
て走行させ、基体上に磁性塗料を塗布後、流動性がなく
なるまで磁界を連続して加えることによって、磁性粉末
粒子の磁化容易軸を基体の走行方向に良好に配向させ、
磁気記録媒体の電気的特性を充分に向上させたものであ
る。This invention was made as a result of intensive research to overcome this problem. Magnetic paint is applied onto a substrate, and then, while the magnetic coating film on the substrate has fluidity, two or more permanent The substrate is introduced into a magnetic field in which magnets are arranged in such a way that the N-3 poles are parallel to the running direction of the substrate and different poles are adjacent to each other, and the magnetic paint is applied onto the substrate until it loses its fluidity. By continuously applying a magnetic field, the axis of easy magnetization of the magnetic powder particles is well oriented in the running direction of the substrate,
This sufficiently improves the electrical characteristics of a magnetic recording medium.
以下、この発明を図面を参考にして説明する。This invention will be explained below with reference to the drawings.
第１図はこの発明の磁気記録媒体の製造方法の概略を示
したもので、この方法では、繰り出しロール１から繰り
出されるベースフィルム２を、−定速度で走行させなが
ら、コーティングヘッド３で磁性塗料を塗布し、ベース
フィルム２上に塗布形成した磁性塗膜４が未乾燥状態に
ある間に、乾燥機５の直前に配設されたＮ−Ｎ対向磁石
６，６間に導く。FIG. 1 shows an outline of a method for manufacturing a magnetic recording medium according to the present invention. In this method, a base film 2 fed out from a feed roll 1 is coated with a magnetic coating material using a coating head 3 while running at a constant speed. is applied, and while the magnetic coating film 4 coated and formed on the base film 2 is in an undried state, it is guided between the N-N opposing magnets 6, 6 disposed immediately before the dryer 5.
続いて乾燥機５内に導入し、乾燥機５内下方にＮ−３極
が基体の走行方向と平行でかつ異極同士が隣接するよう
に多数並設された磁石７の直上に導いて、磁性塗膜４を
乾燥しながら磁性塗膜４中の磁性粉末粒子の磁化容易軸
をベースフィルム２の走行方向ａに沿って配向させ、完
全に乾燥、硬化させたのち、乾燥機５から導出して、巻
き取りロール８に巻き取っている。９はコーティングヘ
ッド３で塗布する磁性塗料中の不純物を濾過するための
フィルターである。Next, it is introduced into the dryer 5, and guided directly above the magnets 7, which have a large number of N-3 poles arranged parallel to each other and with different poles adjacent to each other, in the lower part of the dryer 5. While drying the magnetic coating film 4, the axis of easy magnetization of the magnetic powder particles in the magnetic coating film 4 is oriented along the running direction a of the base film 2, and after being completely dried and cured, it is taken out from the dryer 5. The film is then wound onto a winding roll 8. Reference numeral 9 denotes a filter for filtering impurities in the magnetic paint applied by the coating head 3.
しかして、磁性塗膜４が設けられたベースフィルム２が
、乾燥機５の直前に配設されたＮ−Ｎ対向磁石６．６間
に導入出されると、このＮ−Ｎ対向磁石６，６によって
、磁性塗膜中の磁性粉末粒子はベースフィルム２の走行
方向に配向される。When the base film 2 provided with the magnetic coating film 4 is introduced between the N-N opposing magnets 6.6 disposed immediately before the dryer 5, the N-N opposing magnets 6,6 As a result, the magnetic powder particles in the magnetic coating are oriented in the running direction of the base film 2.
そして、さらに乾燥機５内にＮ−３極が基体の走行方向
と平行でかつ異極同士が隣接するように多数並設された
磁石７の直上に導入されると、多数並設された磁石７間
に作用する磁力線７ａによって、磁性塗膜４中の磁性粉
末粒子はベースフィルム２の走行方向ａに沿うように配
向され、磁性塗膜の流動性がなくなるまでこの配向が続
けられる。鉋って、磁性塗膜４中の磁性粉末粒子は、ベ
ースフィルム２０走行方向に容易かつ良好に配向され、
角型が充分に向上されて、電気的特性が充分に向上され
る。Further, when the N-3 pole is introduced into the dryer 5 directly above the magnets 7 which are arranged parallel to each other so that the N-3 poles are parallel to the traveling direction of the substrate and the different poles are adjacent to each other, the magnets 7 arranged in parallel are The magnetic powder particles in the magnetic coating film 4 are oriented along the running direction a of the base film 2 by the lines of magnetic force 7a acting between the magnetic flux lines 7a, and this orientation continues until the magnetic coating film loses its fluidity. By plane, the magnetic powder particles in the magnetic coating film 4 are easily and well oriented in the running direction of the base film 20,
The square shape is sufficiently improved, and the electrical characteristics are sufficiently improved.
乾燥機５内に、Ｎ−３極が基体の走行方向と平行でかつ
異極同士が隣接するように多数並設される磁石７は、こ
れらの磁石７からの磁力線７ａが良好に作用するように
するため、磁石７の直上を走行するベースフィルム２と
の距離ｔ−１０〜２００１１１１ｍの範囲内とし、また
これらの磁石７の磁場の強さを５０〜５ｏｏｏガウスの
範囲内とするのが好ましい、また、隣接する磁石７同士
の間隙は磁石７からの磁力線７ａが磁性塗膜４に良好に
作用するようにするため５〜Ｌｏｏｍｍの範囲内とする
のが好ましい。A large number of magnets 7 are arranged in parallel in the dryer 5 so that the N-3 poles are parallel to the running direction of the substrate and different poles are adjacent to each other, so that the lines of magnetic force 7a from these magnets 7 can work well. In order to achieve this, it is preferable that the distance from the base film 2 running directly above the magnets 7 is within the range of t-10 to 2001111 m, and the strength of the magnetic field of these magnets 7 is within the range of 50 to 500 Gauss. Further, the gap between adjacent magnets 7 is preferably set within the range of 5 to Loomm so that the lines of magnetic force 7a from the magnets 7 can act favorably on the magnetic coating film 4.
なお、磁性塗膜４中の磁性粉末粒子は、乾燥機５内に配
設された磁石７によって、充分良好に配向されるため、
乾燥機５の直前のＮ−Ｎ対向磁石６．６は必ずしも必要
でないが、乾燥機５の直前のＮ−Ｎ対向磁石６．６を配
設しておくと、より良好な配向が行える。In addition, since the magnetic powder particles in the magnetic coating film 4 are sufficiently oriented by the magnet 7 disposed in the dryer 5,
Although the N-N opposing magnet 6.6 immediately before the dryer 5 is not necessarily required, if the N-N opposing magnet 6.6 is provided immediately before the dryer 5, better orientation can be achieved.
また、Ｎ−Ｓ極が基体の走行方向と平行でかつ異極同士
が隣接するように多数並設される磁石７は、ベースフィ
ルム２上に塗布形成した磁性塗膜４の流動性がなくなる
まで磁石７からの磁力線７ａを作用することができれば
よく、必ずしも乾燥機５内に配設する必要はないが、乾
燥機５内に配設し、乾燥しながら配向させると迅速な配
向が行え、生産効率を向上させることができる。In addition, a large number of magnets 7 are arranged in parallel so that the N-S poles are parallel to the running direction of the substrate and different poles are adjacent to each other until the magnetic coating film 4 coated on the base film 2 loses its fluidity. It is only necessary that the magnetic lines of force 7a from the magnet 7 can be applied, and it is not necessarily necessary to arrange it inside the dryer 5, but if it is arranged inside the dryer 5 and oriented while drying, quick orientation can be performed and production can be improved. Efficiency can be improved.
第２図はこの発明の磁気記録媒体の製造方法の他の例の
概略を示したもので、乾燥機５内に、Ｎ−Ｓ極が基体の
走行方向と平行でかつ異極同士が隣接するように多数並
設された磁石７を、走行するベースフィルム２の上下両
側に同極同士を対抗させて配列した以外は、第１図に示
す場合と同様にして構成されている。FIG. 2 schematically shows another example of the method for manufacturing a magnetic recording medium of the present invention, in which the N-S poles are parallel to the running direction of the substrate and different poles are adjacent to each other in the dryer 5. The structure is the same as that shown in FIG. 1, except that a large number of magnets 7 are arranged in parallel on both sides of the traveling base film 2 with the same polarity facing each other.
この製造方法によれば、Ｎ−３極が基体の走行方向と平
行でかつ異極同士が隣接するように多数並設された磁石
７を、走行するベースフィルム２の上下両側に同極同士
を対向させて配列しているため、磁力線７ａ、７ａが対
向する上下の磁石７７から作用し、−段と磁性粉末が良
好に配向される。According to this manufacturing method, a large number of magnets 7 are arranged in parallel so that the N-3 poles are parallel to the running direction of the substrate and different poles are adjacent to each other, and magnets 7 with the same poles are arranged on both upper and lower sides of the running base film 2. Since they are arranged to face each other, the lines of magnetic force 7a, 7a act from the opposing upper and lower magnets 77, and the - stage and magnetic powder are well oriented.
この場合、これら上下の磁石７．７からの磁力線７ａ、
７ａが良好に作用するようにするため、上下の磁石７．
７とこれらの磁石７，７間を走行するベースフィルム２
との距離を５〜２００ｍｍの範囲内とし、またこれらの
磁石７．７の磁場の強さを５０〜５０００ガウスの範囲
内とするのが好ましい、また、隣接する磁石７同士の間
隙は第１図の場合と同様に５〜１００ｅ−の範囲内とす
るのが好ましい。In this case, magnetic lines of force 7a from these upper and lower magnets 7.7,
7a to work well, the upper and lower magnets 7.
7 and the base film 2 running between these magnets 7, 7.
It is preferable that the distance between the magnets 7 and As in the case shown in the figure, it is preferably within the range of 5 to 100 e-.
磁性塗料を調製する際、使用される磁性粉末としては、
１−ＦｅｘＯｓ粉末、Ｆｌ！ｓｏｎ粉末、７−Ｆｅ１０
３とＦｅ１ｏｎの中間酸化鉄粉末、Ｃｏ含有７−Ｆｅ１
Ｏｓ粉末、Ｃｏ含有Ｆｅ、０、粉末１、Ｆｅ粉末、Ｆｅ
を主体として各種金属を添加した金属粉末、Ｃｏ粉末、
Ｎｉ粉末、あるいはこれらの合金粉末など、従来一般に
広く使用されるものがいずれも好適なものとして使用さ
れる。When preparing magnetic paint, the magnetic powder used is:
1-FexOs powder, Fl! son powder, 7-Fe10
3 and Fe1on intermediate iron oxide powder, Co-containing 7-Fe1
Os powder, Co-containing Fe, 0, powder 1, Fe powder, Fe
Co powder, Co powder,
Any of the materials commonly used in the past, such as Ni powder or alloy powders thereof, can be suitably used.
また、結合剤樹脂としては、塩化ビニル−酢酸ビニル系
共重合体、ポリビニルブチラール樹脂、繊維素系樹脂、
ポリウレタン系樹脂、ポリエステル系樹脂、イソシアネ
ート化合物など従来汎用されている結合剤樹脂が広く用
いられる。In addition, as the binder resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral resin, cellulose resin,
Conventional binder resins such as polyurethane resins, polyester resins, and isocyanate compounds are widely used.
有機溶剤としては、トルエン、メチルイソブチルケトン
、メチルエチルケトン、シクロヘキサノン、テトラヒド
ロフラン、酢酸エチルなど従来から汎用されている有機
溶剤が、単独または二種以上混合して使用される。As the organic solvent, conventionally used organic solvents such as toluene, methyl isobutyl ketone, methyl ethyl ketone, cyclohexanone, tetrahydrofuran, and ethyl acetate can be used alone or in combination of two or more.
なお、磁性塗料中には、通常使用されている各種添加剤
、たとえば、分散剤、潤滑剤、充填剤、帯電防止剤など
を任意に添加使用してもよい。Note that various commonly used additives such as dispersants, lubricants, fillers, antistatic agents, etc. may be optionally added to the magnetic coating material.
次に、この発明の実施例について説明する。 Next, embodiments of the invention will be described.
実施例１〜７
針状７−ＦｅｘＯｓ粉末 ８０重量部（保磁力
６５０エルステツド）
塩化ビニル−酢酸ビニル−ビニ ９ ＃ルアルコール
共重合体
ポリウレタン樹脂 ９ 〃三官能性低
分子量イソシアネー ２ 〃ト化合物
メチルイソブチルケトン ６０ −トルエン
６０＃この組成物をボールミル
で１６時間混合分散して磁性塗料を調整した。この磁性
塗料を第１図に示すように、コーティングヘッド３を用
いて厚さ１２μｍのポリエステルベースフィルム２上に
塗布し、これが未乾燥状態にある間に、Ｎ−Ｎ対抗磁石
６．６間に導入出させ、次いで、乾燥機５内に４個所配
設した磁石７上を走行させ、磁石７による磁場の強さを
種々に変えて磁性粉末の配向処理を行うと同時に熱風乾
燥して、乾燥厚が６μｍの磁性層を形成した。しかる後
、所定の巾に裁断して磁気テープをつ（った、磁場の強
さは、磁石７のポリエステルベースフィルム２との間隔
を下記第１表に示すように種々に変えて調整した。Examples 1 to 7 Acicular 7-FexOs powder 80 parts by weight (coercive force 650 oersted) Vinyl chloride-vinyl acetate-vinyl 9 Alcohol copolymer polyurethane resin 9 Trifunctional low molecular weight isocyanate 2 Compound methyl isobutyl Ketone 60-toluene
#60 This composition was mixed and dispersed in a ball mill for 16 hours to prepare a magnetic paint. As shown in FIG. 1, this magnetic paint is applied onto a polyester base film 2 with a thickness of 12 μm using a coating head 3, and while it is in an undried state, it is applied between N-N opposing magnets 6 and 6. Then, the powder is run over magnets 7 arranged at four locations in the dryer 5, and the strength of the magnetic field from the magnets 7 is varied to orient the magnetic powder. At the same time, the powder is dried with hot air. A magnetic layer having a thickness of 6 μm was formed. Thereafter, the magnetic tape was cut to a predetermined width and the strength of the magnetic field was adjusted by varying the distance between the magnet 7 and the polyester base film 2 as shown in Table 1 below.
実施例８
実施例１における磁場配向において、第１図に示す磁場
配向装置に代えて第２図に示す磁場配向装置を使用し、
ポリエステルベースフィルム２の上下に配設した磁石７
，７による磁場の強さを、上下の磁石７，７とポリエス
テルベースフィルム２との間隔を２０ｍｍにして８００
ガウスに調整した以外は実施例１と同様にして磁気テー
プをつくった。Example 8 In the magnetic field orientation in Example 1, the magnetic field orientation device shown in FIG. 2 was used instead of the magnetic field orientation device shown in FIG. 1,
Magnets 7 arranged above and below the polyester base film 2
, 7 is set to 800 mm by setting the distance between the upper and lower magnets 7, 7 and the polyester base film 2 to 20 mm.
A magnetic tape was produced in the same manner as in Example 1 except that the adjustment was made to Gaussian.
比較例り
実施例１において、乾燥機５内に配設された磁石７を省
いた以外は、実施例１と同様にして磁気テープをつくう
た。Comparative Example A magnetic tape was prepared in the same manner as in Example 1, except that the magnet 7 disposed in the dryer 5 was omitted.
各実施例および比較例で得られた磁気テープについて、
角型比を測定した。Regarding the magnetic tapes obtained in each example and comparative example,
The squareness ratio was measured.
下記第１表はその結果である。Table 1 below shows the results.
第１表
〔発明の効果３
上記第１表から明らかなように、この発明の方法で得ら
れた磁気テープ（実施例１〜８）は、従来の方法で得ら
れた磁気テープ（比較例１）に比し、いずれも角型が高
く、このことからこの発明の製造方法および装置によれ
ば、磁性粉末粒子の配向が良好に行われ、電気的特性に
優れた磁気記録媒体が得られることがわかる。Table 1 [Effect of the Invention 3] As is clear from Table 1 above, the magnetic tapes obtained by the method of the present invention (Examples 1 to 8) are different from the magnetic tapes obtained by the conventional method (Comparative Example 1). ), all of them have higher angularity, and therefore, according to the manufacturing method and apparatus of the present invention, the magnetic powder particles are well oriented, and a magnetic recording medium with excellent electrical properties can be obtained. I understand.
第１図はこの発明の磁気テープの製造工程の一例の概略
を示す説明図、第２図は同地の例の概略を示す説明図、
第３図は従来の磁気テープの製造工程の概略を示す説明
図である。
２・・・ベースフィルム（基体）、４・・・磁性塗膜、
５・・・乾燥機、７・・・磁石
第３図FIG. 1 is an explanatory diagram showing an outline of an example of the manufacturing process of the magnetic tape of the present invention, FIG. 2 is an explanatory diagram showing an outline of an example of the same process,
FIG. 3 is an explanatory diagram showing an outline of a conventional magnetic tape manufacturing process. 2...Base film (substrate), 4...Magnetic coating film,
5...Dryer, 7...Magnet Figure 3
Claims (1)
塗膜が流動性を有する間に、２個以上の永久磁石をＮ−
Ｓ極が基体の走行方向と平行でかつ異極同士が隣接する
ように配列した磁界中に基体を導入して走行させ、磁性
塗膜中の磁性粉末粒子の磁化容易軸を基体の走行方向に
配向させることを特徴とする磁気記録媒体の製造方法 ２、基体上に磁性塗料を塗布する塗工機に、２個以上の
永久磁石をＮ−Ｓ極が基体の走行方向と平行でかつ異極
同士が隣接するように配列した磁場配向装置を並設し、
塗工機で塗布された磁性塗膜が流動性を有する間に、基
体を磁場配向装置内に導入するようにしたことを特徴と
する磁気記録媒体の製造装置 ３、磁場配向装置が、２個以上の永久磁石をＮ−Ｓ極が
基体の走行方向と平行でかつ異極同士が隣接するように
走行する基体の上方または下方の何れか一方の側に配列
した磁場配向装置である請求項２記載の磁気記録媒体の
製造装置 ４、磁場配向装置が、２個以上の永久磁石をＮ−Ｓ極が
基体の走行方向と平行でかつ異極同士が隣接するように
走行する基体の上下両側に同極同士を対向させて配列し
た磁場配向装置である請求項２記載の磁気記録媒体の製
造装置[Claims] 1. A magnetic paint is applied onto a substrate, and then, while the magnetic coating film on the substrate has fluidity, two or more permanent magnets are applied to the N-
The substrate is introduced into a magnetic field arranged in such a way that the S poles are parallel to the running direction of the substrate and different poles are adjacent to each other, and the substrate is run, so that the axis of easy magnetization of the magnetic powder particles in the magnetic coating is aligned with the running direction of the substrate. 2. A method for producing a magnetic recording medium characterized by orientation 2, in which two or more permanent magnets are placed in a coating machine that applies magnetic paint on a substrate, so that the N-S poles are parallel to the running direction of the substrate and have different polarities. The magnetic field orientation devices are arranged in parallel so that they are adjacent to each other,
Magnetic recording medium manufacturing apparatus 3, characterized in that the substrate is introduced into the magnetic field orientation device while the magnetic coating film applied by the coating machine has fluidity, comprising two magnetic field orientation devices. Claim 2: A magnetic field orientation device in which the above permanent magnets are arranged on either the upper or lower side of a running base such that the N-S poles are parallel to the running direction of the base and different poles are adjacent to each other. In the magnetic recording medium manufacturing apparatus 4 described above, the magnetic field orientation device places two or more permanent magnets on both upper and lower sides of a substrate running such that the N-S poles are parallel to the running direction of the substrate and different poles are adjacent to each other. The apparatus for manufacturing a magnetic recording medium according to claim 2, which is a magnetic field orientation apparatus in which the same poles are arranged to face each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17424388A JPH0223524A (en) | 1988-07-12 | 1988-07-12 | Method and apparatus for producing magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17424388A JPH0223524A (en) | 1988-07-12 | 1988-07-12 | Method and apparatus for producing magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0223524A true JPH0223524A (en) | 1990-01-25 |
Family
ID=15975220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17424388A Pending JPH0223524A (en) | 1988-07-12 | 1988-07-12 | Method and apparatus for producing magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0223524A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5763019A (en) * | 1996-02-13 | 1998-06-09 | Kao Corporation | Method of manufacturing magnetic recording medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61267933A (en) * | 1985-05-21 | 1986-11-27 | Berumateitsuku:Kk | Manufacturing device for magnetic recording medium |
| JPS61289532A (en) * | 1985-06-14 | 1986-12-19 | Konishiroku Photo Ind Co Ltd | Production of magnetic recording medium |
| JPS62243129A (en) * | 1986-04-16 | 1987-10-23 | Hitachi Maxell Ltd | Production of magnetic recording medium |
| JPS63136321A (en) * | 1986-11-27 | 1988-06-08 | Tdk Corp | Manufacture of magnetic recording medium |
-
1988
- 1988-07-12 JP JP17424388A patent/JPH0223524A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61267933A (en) * | 1985-05-21 | 1986-11-27 | Berumateitsuku:Kk | Manufacturing device for magnetic recording medium |
| JPS61289532A (en) * | 1985-06-14 | 1986-12-19 | Konishiroku Photo Ind Co Ltd | Production of magnetic recording medium |
| JPS62243129A (en) * | 1986-04-16 | 1987-10-23 | Hitachi Maxell Ltd | Production of magnetic recording medium |
| JPS63136321A (en) * | 1986-11-27 | 1988-06-08 | Tdk Corp | Manufacture of magnetic recording medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5763019A (en) * | 1996-02-13 | 1998-06-09 | Kao Corporation | Method of manufacturing magnetic recording medium |
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