JPS6260724B2 - - Google Patents

Info

Publication number
JPS6260724B2
JPS6260724B2 JP54024966A JP2496679A JPS6260724B2 JP S6260724 B2 JPS6260724 B2 JP S6260724B2 JP 54024966 A JP54024966 A JP 54024966A JP 2496679 A JP2496679 A JP 2496679A JP S6260724 B2 JPS6260724 B2 JP S6260724B2
Authority
JP
Japan
Prior art keywords
abrasive
coating film
roughness
cleaning
gradually
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
Application number
JP54024966A
Other languages
Japanese (ja)
Other versions
JPS55117730A (en
Inventor
Takeshi Matsura
Akira Morioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP2496679A priority Critical patent/JPS55117730A/en
Publication of JPS55117730A publication Critical patent/JPS55117730A/en
Publication of JPS6260724B2 publication Critical patent/JPS6260724B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】[Detailed description of the invention]

この発明は磁気ヘツド清掃用クリーニングテー
プの製造方法に関し、その目的とするところはク
リーニング効果の優れたクリーニングテープを提
供することにある。 磁気記録再生装置の磁気ヘツドに付着した塵
埃、磁性粉末などの付着異物を取り除くのに使用
されるクリーニングテープは、一般に砥粒と増量
剤とをバインダーとともに混練し、これをポリエ
ステルベースフイルム等の基体上に塗着して作ら
れる。 このようにして作られるクリーニングテープは
研摩塗膜中に混入する砥粒の粒径が大きければ大
きいほど、又硬さが硬ければ硬いほどクリーニン
グ効果を向上できるが、従来の製造方法では粒径
の大きな研摩砥粒を使用すると研摩塗膜の表面が
粗くなりすぎ、磁気ヘツドに摺接させて付着異物
を除去する際磁気ヘツドを摩耗、損傷するという
難点があつた。 この発明は、かかる観点から種々検討した結果
なされたもので、平均粒子径0.3μ以上の研摩砥
粒を増量剤およびバインダーとともに混練した研
摩塗料を基体に塗着後、カレンダーロールで連続
的又は段階的に加熱、加圧し、研摩砥粒を砥摩塗
膜中に埋設して研摩塗膜の表面粗さを長さ方向に
中心線平均粗さ0.04〜0.10μの範囲内で漸次変化
させることによつて所期の目的を達成したもので
ある。 この発明によれば、平均粒子径0.3μ以上の粒
径の大きな研摩砥粒を使用することができるため
クリーニング効果を一段と向上することができ、
又研摩塗膜をカレンダーロールで連続的又は段階
的に加熱、加圧し、研摩砥粒を研摩塗膜中に埋設
して研摩塗膜の表面粗さを長さ方向に中心線平均
粗さ0.04〜0.10μの範囲内で漸次変化させている
ため、粒径の大きな研摩砥粒を使用しても使用時
に磁気ヘツドを摩耗、損傷するおそれがない。 この発明に使用する研摩砥粒は平均粒子径0.3
μ以上のものを使用すれば優れたクリーニング効
果が得られ、粒径が大きくなるにつれてクリーニ
ング効果が向上されるが、平均粒子径が5.0μ以
上のものを使用すると所期の表面粗さが得られな
いため、研摩砥粒は平均粒子径0.3μ〜5.0μの大
きさのものを使用するのが好ましい。このような
研摩砥粒の具体例としては、Cr2O3粉末、Al2O3
粉末、SiC粉末等が挙げられる。 又、カレンダーロールで連続的又は段階的に加
熱、加圧して形成される研摩塗膜の長さ方向に漸
次変化する表面粗さは、中心線平均粗さを0.04μ
以上にすれば、研摩塗膜の表面粗さを平滑にしす
ぎることもなく磁気ヘツドに付着した付着異物を
良好に除去でき、粗くなるに従つてクリーニング
効果は向上されるが、0.10μ以上にすると研摩塗
膜の表面が粗くなりすぎ、使用時に磁気ヘツドを
摩耗、損傷するおそれがあるため、中心線平均粗
さ0.04〜0.10μの範囲内で粗さを変えることが好
ましい。 このように全表面粗さが中心線平均粗さ0.04〜
0.10μの範囲内で長さ方向に漸次変化する研摩塗
膜はカレンダーロールで温度20〜60℃、圧力(綿
圧)50〜200Kg/cmの条件下に研摩塗膜を加熱、
加圧することよつて形成され、温度は室温以上と
し60℃以上となると塗膜表面が鏡面となり過ぎク
リーニング効果がなくなる。また圧力は0Kg/cm
以上としないとカレンダー効果がなくまた200
Kg/cm以上はカレンダーロールの機械的能力の限
界となる。 又、本発明によるクリーニングテープは中心線
平均粗さ0.04〜0.10μの範囲内で漸次粗く、また
は平滑となる研摩塗膜を有するが、このような漸
次粗く、または平滑となる表面性を得るには圧力
を一定(200Kg/cm)にしたカレンダーロールで
研摩塗膜を徐々に20〜60℃の範囲内で加熱する
か、又は温度を一定(60℃)にしたカレンダーロ
ールで研摩塗膜を徐々に200Kg/cm以内の加圧力
で加圧するか、あるいはカレンダーロールで研摩
塗膜を徐々に20〜60℃の範囲内で加熱し、200
Kg/cm以内の加圧力で加圧することによつて所望
の粗さで塗膜表面を漸次平滑化することができ
る。図面はこのようにして形成された研摩塗膜の
各部表面の中心線平均粗さをグラフで表わしたも
ので曲線Aは圧力を一定にして徐々に加熱した場
合、曲線Bは温度を一定にして徐々に加圧した場
合、曲線Cは徐々に加熱、加圧した場合の5m長
のクリーニングテープの始端から末端までの研摩
塗膜の各テープ長さにおける中心線平均粗さの関
係を示す。このようにカレンダーロールで段階的
に加熱、加圧し、表面粗さを中心線平均粗さ0.04
〜0.10μの範囲内で漸次変化させた研摩塗膜は、
表面粗さが順次小さくなつているため、クリーニ
ング効果が優れ、使用時に磁気ヘツドを摩耗、損
傷するおそれもない。 次に、この発明の実施例について説明する。 実施例 1 コバルト含有針状酸化鉄磁性粉末 70重量部 粒状α酸化鉄粉末(平均粒子径0.5μ) 15 〃 SiC(平均粒子径1.0μ) 10 〃 リユーロンQA−431(塩化ビニル−プロピオン
酸ビニル−マレイン酸共重合体) 25 〃 メチルイソブチルケトン 100 〃 トルオール 100 〃 これらの組成物をボールミル中で96時間混合分
散し、これを21μ厚のポリエステルフイルム上に
乾燥厚が6μとなるように塗着乾燥したのち、
200Kg/cmの一定の圧力下で温度を20〜60℃の範
囲で徐々に加熱してカレンダー処理した。しかる
のち所定の幅に裁断してクリーニングテープをつ
くつた。 実施例 2 実施例1のカレンダー処理条件を変更し、60℃
の一定温度で圧力を0〜200Kg/cmに徐々に加圧
して行なつた以外は実施例1と同様にしてクリー
ニングテープをつくつた。 実施例 3 実施例1のカレンダー処理条件を変更し、温度
を20〜60℃、圧力を0〜200Kg/cmに徐々に加
熱、加圧して行なつた以外は実施例1と同様にし
てクリーニングテープをつくつた。 図面はこのようにして得られたクリーニングテ
ープの各部表面の中心線平均粗さをグラフで表し
たもので、グラフAは実施例1で得られたクリー
ニングテープを示し、グラフBは実施例2で得ら
れたクリーニングテープを示す。またグラフCは
実施例3で得られたクリーニングテープを示し、
こように各実施例で得られたクリーニングテープ
は、中心線平均粗さが0.04〜0.10μの範囲内で漸
次変化している。 比較例 1 実施例1に於いて、カレンダー処理を行なわな
かつた以外は実施例1と同様にしてクリーニング
テープをつくつた。 比較例 2 実施例1に於いて、平均粒子径0.5μの粒状α
酸化鉄粉末に替えて平均粒子径0.2μの粒状α酸
化鉄粉末を使用し、平均粒子径1.0μのSiCに替え
て平均粒子径0.2μのSiCを使用し、さらに80℃、
200Kg/cmの条件でカレンダー処理した以外は実
施例1と同様にしてクリーニングテープをつくつ
た。 各実施例および比較例で得られたクリーニング
テープを、磁性塗膜離脱物あるいは塵埃等の付着
により磁気ヘツドの目づまりしたビデオテープレ
コーダにかけ、目づまりのとれ具合と、クリーニ
ングテープによる磁気ヘツドの傷つき状態を調べ
た。 下表はその結果である。
The present invention relates to a method for manufacturing a cleaning tape for cleaning a magnetic head, and its object is to provide a cleaning tape with excellent cleaning effects. Cleaning tapes used to remove foreign matter such as dust and magnetic powder adhering to the magnetic head of a magnetic recording/reproducing device are generally made by kneading abrasive grains and an extender with a binder, and applying this to a substrate such as a polyester base film. It is made by painting on top. The larger the particle size of the abrasive grains mixed in the abrasive coating film and the harder the cleaning tape made in this way, the more the cleaning effect can be improved. When large abrasive grains are used, the surface of the abrasive coating becomes too rough, and the magnetic head is abraded and damaged when it is brought into sliding contact with the magnetic head to remove adhering foreign matter. This invention was made as a result of various studies from this point of view, and after applying an abrasive paint in which abrasive grains with an average particle size of 0.3μ or more are kneaded together with an extender and a binder to a substrate, it is applied continuously or stepwise with a calendar roll. By applying heat and pressure to embed abrasive grains in the abrasive coating film, the surface roughness of the abrasive coating film is gradually changed in the length direction within the range of centerline average roughness of 0.04 to 0.10μ. Thus, the intended purpose was achieved. According to this invention, since it is possible to use abrasive grains having a large average particle diameter of 0.3μ or more, the cleaning effect can be further improved.
In addition, the abrasive coating film is heated and pressurized continuously or stepwise with a calendar roll, and abrasive grains are embedded in the abrasive coating film so that the surface roughness of the abrasive coating film is adjusted to a center line average roughness of 0.04 to 0.04 in the longitudinal direction. Since the diameter is gradually changed within a range of 0.10μ, there is no risk of wear or damage to the magnetic head during use even when using abrasive grains with a large diameter. The abrasive grains used in this invention have an average particle diameter of 0.3
An excellent cleaning effect can be obtained by using particles with an average particle size of 5.0μ or more, and the cleaning effect improves as the particle size increases. Therefore, it is preferable to use polishing abrasive grains having an average particle diameter of 0.3 μ to 5.0 μ. Specific examples of such abrasive grains include Cr 2 O 3 powder, Al 2 O 3
Examples include powder, SiC powder, and the like. In addition, the surface roughness that gradually changes in the length direction of the abrasive coating film formed by heating and pressing continuously or stepwise with a calendar roll has a center line average roughness of 0.04μ.
If the surface roughness of the abrasive film is set above 0.10 μm, foreign matter adhering to the magnetic head can be removed well without making the surface roughness of the polishing film too smooth. Since the surface of the abrasive coating film may become too rough and cause abrasion or damage to the magnetic head during use, it is preferable to vary the roughness within the range of center line average roughness of 0.04 to 0.10μ. In this way, the total surface roughness is the center line average roughness of 0.04~
The abrasive coating film that changes gradually in the length direction within the range of 0.10μ is heated with a calendar roll at a temperature of 20 to 60℃ and a pressure (cotton pressure) of 50 to 200 kg/cm.
It is formed by applying pressure, and the temperature should be above room temperature. If the temperature is above 60°C, the coating surface becomes too mirror-like and the cleaning effect is lost. Also, the pressure is 0Kg/cm
If it is not more than 200, there will be no calendar effect.
Kg/cm or more is the limit of the mechanical capacity of the calender roll. Further, the cleaning tape according to the present invention has an abrasive coating film that becomes gradually rougher or smoother within a center line average roughness range of 0.04 to 0.10μ, but in order to obtain such a surface that becomes gradually rougher or smoother, The abrasive coating film is gradually heated within the range of 20 to 60℃ using a calendar roll with a constant pressure (200 kg/cm), or the abrasive coating film is gradually heated with a calender roll at a constant temperature (60℃). Apply pressure to within 200 kg/cm, or gradually heat the abrasive film with a calendar roll to a temperature of 20 to 60°C.
By applying pressure at a pressure within Kg/cm, the surface of the coating film can be gradually smoothed to a desired roughness. The drawing is a graph showing the center line average roughness of each part of the surface of the abrasive coating film formed in this way.Curve A shows the roughness when the pressure is kept constant and heating is done gradually, and curve B shows the roughness when the temperature is kept constant. Curve C shows the relationship between the centerline average roughness of the abrasive coating film at each tape length from the starting end to the end of a 5 m long cleaning tape when the tape is gradually heated and pressurized. In this way, the surface is heated and pressurized in stages with a calendar roll, and the surface roughness is adjusted to a center line average roughness of 0.04.
The abrasive coating film was gradually changed within the range of ~0.10μ.
Since the surface roughness is gradually reduced, the cleaning effect is excellent, and there is no risk of abrasion or damage to the magnetic head during use. Next, embodiments of the invention will be described. Example 1 Cobalt-containing acicular iron oxide magnetic powder 70 parts by weight Granular α-iron oxide powder (average particle size 0.5 μ) 15 〃 SiC (average particle size 1.0 μ) 10 〃 Lieuron QA-431 (vinyl chloride-vinyl propionate- Maleic acid copolymer) 25 〃 Methyl isobutyl ketone 100 〃 Toluene 100 〃 These compositions were mixed and dispersed in a ball mill for 96 hours, and this was coated on a 21μ thick polyester film to a dry thickness of 6μ and dried. After that,
Calendar treatment was carried out by gradually heating the temperature in the range of 20 to 60° C. under a constant pressure of 200 Kg/cm. After that, I cut it to the specified width and made cleaning tape. Example 2 The calendering conditions of Example 1 were changed to 60°C.
A cleaning tape was prepared in the same manner as in Example 1, except that the pressure was gradually increased from 0 to 200 kg/cm at a constant temperature. Example 3 A cleaning tape was prepared in the same manner as in Example 1, except that the calendering conditions of Example 1 were changed, and the temperature was gradually increased to 20 to 60°C and the pressure was increased to 0 to 200 kg/cm. I made it. The drawing is a graph showing the center line average roughness of each part of the surface of the cleaning tape obtained in this way. Graph A shows the cleaning tape obtained in Example 1, and graph B shows the roughness in Example 2. The resulting cleaning tape is shown. Graph C shows the cleaning tape obtained in Example 3,
As described above, the center line average roughness of the cleaning tapes obtained in each example gradually changed within the range of 0.04 to 0.10μ. Comparative Example 1 A cleaning tape was made in the same manner as in Example 1 except that the calendering treatment was not performed. Comparative Example 2 In Example 1, particles α with an average particle diameter of 0.5μ
Granular α-iron oxide powder with an average particle size of 0.2μ was used instead of iron oxide powder, and SiC with an average particle size of 0.2μ was used instead of SiC with an average particle size of 1.0μ.
A cleaning tape was prepared in the same manner as in Example 1, except that the calender treatment was performed at 200 kg/cm. The cleaning tapes obtained in each of the Examples and Comparative Examples were applied to a video tape recorder whose magnetic head was clogged due to detachment of the magnetic coating film or adhesion of dust, etc., and the extent to which the clog was cleared and the extent to which the magnetic head was damaged by the cleaning tape were evaluated. I looked into it. The table below shows the results.

【表】 上表から明らかなように、カレンダー処理を行
なわない従来の方法によるもの(比較例1)では
磁気ヘツドに傷がつくのに対し、この発明方法に
よるもの(実施例1〜3)はいずれも磁気ヘツド
の傷つきがなく、又0.3μ以下の研摩砥粒を使用
した従来の方法によるもの(比較例2)では目づ
まりがほとんどこれないのに対し、この発明方法
によるものはいずれも目づまりがとれ易い。この
ことからこの発明方法によれば磁気ヘツドを摩
耗、損傷するおそれのない、クリーニング効果の
優れたクリーニングテープが得られるのがわか
る。
[Table] As is clear from the above table, the magnetic head was damaged by the conventional method without calendering (Comparative Example 1), but the magnetic head was damaged by the method of this invention (Examples 1 to 3). In either case, there is no damage to the magnetic head, and while the conventional method using abrasive grains of 0.3μ or less (Comparative Example 2) causes almost no clogging, the method of this invention causes no clogging. Easy to remove. This shows that according to the method of the present invention, a cleaning tape with excellent cleaning effects without fear of abrasion or damage to the magnetic head can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は種々のカレンダー処理によりつくられた
クリーニングテープの中心線平均粗さとクリーニ
ングテープ長さとの関係を示す図である。
The drawings are diagrams showing the relationship between the center line average roughness of cleaning tapes made by various calender treatments and the length of the cleaning tape.

Claims (1)

【特許請求の範囲】[Claims] 1 平均粒子径0.3μ以上の研摩砥粒を増量剤お
よびバインダーとともに混練した研摩塗料を基体
上に塗着後、カレンダーロールで連続的又は段階
的に加熱、加圧し、研摩砥粒を研摩塗膜中に埋設
して研摩塗膜の表面粗さを長さ方向に中心線平均
粗さ0.04〜0.10μの範囲内で漸次変化させたこと
を特徴とするクリーニングテープの製造方法。
1. After applying an abrasive paint made by kneading abrasive grains with an average particle diameter of 0.3μ or more with an extender and a binder onto a substrate, heat and pressurize continuously or stepwise with a calendar roll to form an abrasive coating film using abrasive grains. 1. A method for manufacturing a cleaning tape, characterized in that the surface roughness of the abrasive coating film is gradually changed in the longitudinal direction within the range of 0.04 to 0.10 μm in centerline average roughness.
JP2496679A 1979-03-03 1979-03-03 Manufacture of cleaning tape Granted JPS55117730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2496679A JPS55117730A (en) 1979-03-03 1979-03-03 Manufacture of cleaning tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2496679A JPS55117730A (en) 1979-03-03 1979-03-03 Manufacture of cleaning tape

Publications (2)

Publication Number Publication Date
JPS55117730A JPS55117730A (en) 1980-09-10
JPS6260724B2 true JPS6260724B2 (en) 1987-12-17

Family

ID=12152705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2496679A Granted JPS55117730A (en) 1979-03-03 1979-03-03 Manufacture of cleaning tape

Country Status (1)

Country Link
JP (1) JPS55117730A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2835721B2 (en) * 1987-11-17 1998-12-14 大日本印刷株式会社 Manufacturing method of polishing tape
JPH06773A (en) * 1992-06-22 1994-01-11 Fuji Photo Film Co Ltd Manufacture of abrasive tape

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5263716A (en) * 1975-11-21 1977-05-26 Tdk Corp Head cleaning disk
JPS53102017A (en) * 1977-02-18 1978-09-06 Fuji Photo Film Co Ltd Cleaning tape

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5263716A (en) * 1975-11-21 1977-05-26 Tdk Corp Head cleaning disk
JPS53102017A (en) * 1977-02-18 1978-09-06 Fuji Photo Film Co Ltd Cleaning tape

Also Published As

Publication number Publication date
JPS55117730A (en) 1980-09-10

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