JPS6156561B2 - - Google Patents
Info
- Publication number
- JPS6156561B2 JPS6156561B2 JP54076699A JP7669979A JPS6156561B2 JP S6156561 B2 JPS6156561 B2 JP S6156561B2 JP 54076699 A JP54076699 A JP 54076699A JP 7669979 A JP7669979 A JP 7669979A JP S6156561 B2 JPS6156561 B2 JP S6156561B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- liquid paraffin
- coating film
- binder
- coating
- 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
- 238000000576 coating method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 229940057995 liquid paraffin Drugs 0.000 claims description 10
- 239000000314 lubricant Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- -1 Epicote 1001) 18g Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】
本発明は磁気記録媒体、特に磁気デイスク装置
用磁気記録媒体の製法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a magnetic recording medium, particularly a magnetic recording medium for a magnetic disk device.
支持体上に形成された磁気デイスク塗膜は磁気
ヘツドとの接触摩擦により損傷されるため、その
表面潤滑性が要求される。特に最近では、磁気デ
イスクの記録密度が高くなるとともに、磁気ヘツ
ドとの浮動間隔が狭くなる傾向にあるため、表面
潤滑性が高く、耐摩耗性に一層優れた塗膜が要求
されるようになつている。このような要求に対し
て従来は塗膜表面に潤滑剤を塗布することが行わ
れているが、十分な表面潤滑性を得るためには潤
滑剤を大量に塗布する必要がある。しかし、最近
では磁気デイスクの駆動、停止には接触駆動停止
方式が採用されることが多く、このため潤滑剤を
大量塗布した場合には磁気ヘツドがデイスクに密
着して駆動時にデイスクが損傷されることがあ
る。 Since the magnetic disk coating formed on the support is damaged by contact friction with the magnetic head, its surface lubricity is required. In particular, recently, as the recording density of magnetic disks has increased, the floating distance between them and the magnetic head has tended to become narrower, so coatings with high surface lubricity and even better wear resistance have become required. ing. Conventionally, in response to such demands, a lubricant has been applied to the surface of the coating film, but in order to obtain sufficient surface lubricity, it is necessary to apply a large amount of the lubricant. However, recently, a contact drive/stop method is often used to drive and stop magnetic disks, and for this reason, if a large amount of lubricant is applied, the magnetic head will stick tightly to the disk, causing damage to the disk during driving. Sometimes.
本発明の目的は上記の如き従来の磁気デイスク
における欠点を解消し、表面潤滑性に優れ、従つ
て耐久性に優れた磁気デイスクを与えることので
きる磁気記録媒体の製法を提供することにある。 An object of the present invention is to provide a method for manufacturing a magnetic recording medium that can eliminate the above-mentioned drawbacks of conventional magnetic disks and provide magnetic disks with excellent surface lubricity and, therefore, excellent durability.
本発明は即ち支持体上に磁気デイスク塗膜を形
成して磁気記録媒体を製造する方法を提供するも
のであつて、この方法は磁気塗料中に、磁性粉末
及びバインダー等の固形分に対して2.5〜15重量
％の流動パラフインを添加し、これを支持体上に
塗布後、バインダーの硬化時に上記流動パラフイ
ンを分解、蒸発させて、塗膜中に多数のミクロポ
アを形成せしめることを特徴とする。 That is, the present invention provides a method for manufacturing a magnetic recording medium by forming a magnetic disk coating film on a support. It is characterized by adding 2.5 to 15% by weight of liquid paraffin, coating it on a support, and then decomposing and evaporating the liquid paraffin when the binder is cured to form a large number of micropores in the coating film. .
本発明により得られる磁気記録媒体はその磁気
塗膜中に２〜３μｍの大きさのミクロポアを多数
有し、従つてその表面に潤滑剤を塗布したとき、
このミクロポア内に多量の潤滑剤をトラツプし
て、その表面潤滑性を高くかつ経時安定性に優れ
たものとすることができる。 The magnetic recording medium obtained by the present invention has many micropores with a size of 2 to 3 μm in its magnetic coating, and therefore, when a lubricant is applied to its surface,
By trapping a large amount of lubricant within these micropores, it is possible to achieve high surface lubricity and excellent stability over time.
本発明に用いられる流動パラフインは一般に―（
CH2―CH2（―oの構造を有し、その平均分子量は
500〜600であり、室温において粘稠な液体として
存在する。また、その分解量は250℃１時間で80
％以上であり、270℃、１時間では95％以上とな
る。磁気塗料中に添加されたこの流動パラフイン
は塗膜中において、バインダーの加熱硬化処理に
際して分解され、その分解物が蒸発して、その占
有領域にミクロポアとなる空間を作るのである。 The liquid paraffin used in the present invention is generally -(
CH 2 - CH 2 (- has the structure o , and its average molecular weight is
500-600 and exists as a viscous liquid at room temperature. In addition, the amount of decomposition is 80% in 1 hour at 250°C.
% or more, and becomes more than 95% at 270°C for 1 hour. This liquid paraffin added to the magnetic paint is decomposed in the paint film during heat curing of the binder, and the decomposed products evaporate, creating spaces that become micropores in the area occupied by the paraffin.
尚、本発明において流動パラフインの量を2.5
重量％よりも少なくする場合には十分な効果は得
られず、また15重量％より多くする場合には塗膜
の電磁変換特性、特にＳ／Ｎが劣化するので好ま
しくない。 In addition, in the present invention, the amount of liquid paraffin is 2.5
If the amount is less than 15% by weight, no sufficient effect will be obtained, and if it is more than 15% by weight, the electromagnetic conversion characteristics of the coating film, especially the S/N ratio, will deteriorate, which is not preferable.
以下、本発明を例によつて更に説明する。 The invention will now be further explained by way of example.
例 １
磁性粉末（γ−Fe2O3）55ｇ、アクリル樹脂
（50％溶液；三菱レーヨン、デユラクロン
SE5437）54ｇ、エポキシ樹脂（50％溶液；シエ
ル化学、エピコート1001）18ｇ、フエノール樹脂
（20％溶液；ユニオンカーバイド、BKR）45ｇ及
びトルエン／キシレン／ベンジルアルコール
（２：２：１）混合溶剤382ｇの混合物をボールミ
ル中で24時間混練した。これに流動パラフイン10
ｇを添加し、更に24時間混練した。得られた磁性
塗料をアルミ円板にスピンコートし、加熱硬化
（温度250℃）後、所定の膜厚になるまで研磨し
た。Example 1 55g of magnetic powder (γ-Fe 2 O 3 ), acrylic resin (50% solution; Mitsubishi Rayon, Duyracron)
SE5437) 54g, epoxy resin (50% solution; Ciel Chemical, Epicote 1001) 18g, phenolic resin (20% solution; Union Carbide, BKR) 45g and toluene/xylene/benzyl alcohol (2:2:1) mixed solvent 382g. The mixture was milled in a ball mill for 24 hours. Liquid paraffin 10
g was added and kneaded for an additional 24 hours. The obtained magnetic paint was spin-coated onto an aluminum disk, cured by heating (at a temperature of 250°C), and then polished to a predetermined film thickness.
得られた磁性塗膜上に、フレオン中0.1〜10％
の濃度のパーフルオロアルキルポリエーテルの潤
滑剤溶液をコーテイングし、熱処理（温度200
℃）後、このデイスクを模擬ヘツドと摺動させ
て、耐久性を評価した。潤滑剤溶液濃度１％以上
において耐久性は良好であつたが、濃度が７％を
超えるとデイスクとヘツドとの密着のトラブルが
発性した。 0.1-10% in Freon on the resulting magnetic coating
coated with a lubricant solution of perfluoroalkyl polyether with a concentration of
℃), this disk was slid against a simulated head to evaluate its durability. Durability was good when the lubricant solution concentration was 1% or more, but when the concentration exceeded 7%, troubles occurred in the adhesion between the disk and the head.
例 ２
例１と同様にし、流動パラフインの添加量をそ
れぞれ2.5ｇ、５ｇ、12.5ｇ、15ｇ及び20ｇとし
て磁気デイスクを製造し、耐久性を試験した。Example 2 Magnetic disks were manufactured in the same manner as in Example 1, with the amounts of liquid paraffin added being 2.5 g, 5 g, 12.5 g, 15 g, and 20 g, respectively, and their durability was tested.
その結果、耐久性は流動パラフイン量が磁性粉
末及びバインダーの固形分に対して2.5重量％以
上である場合に良好であることが認められた。 As a result, it was found that the durability was good when the amount of liquid paraffin was 2.5% by weight or more based on the solid content of the magnetic powder and binder.
Claims (1)
して、磁気塗料中に、磁性粉末及びバインダー等
の固形分に対して2.5〜15重量％の流動パラフイ
ンを添加し、これを支持体上に塗布後、バインダ
ーの硬化時に前記流動パラフインを分解、蒸発さ
せて、塗膜の表面潤滑性を高めるために潤滑剤を
貯留するための多数のミクロポアを塗膜中に形成
せしめることを特徴とする磁気記録媒体の製法。1. When forming a magnetic disk coating film on a support, 2.5 to 15% by weight of liquid paraffin is added to the magnetic paint based on the solid content of the magnetic powder and binder, and after coating this on the support. , a magnetic recording medium characterized in that when the binder is cured, the liquid paraffin is decomposed and evaporated to form a large number of micropores in the coating film for storing lubricant in order to improve the surface lubricity of the coating film. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7669979A JPS563435A (en) | 1979-06-20 | 1979-06-20 | Manufacture of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7669979A JPS563435A (en) | 1979-06-20 | 1979-06-20 | Manufacture of magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS563435A JPS563435A (en) | 1981-01-14 |
| JPS6156561B2 true JPS6156561B2 (en) | 1986-12-03 |
Family
ID=13612739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7669979A Granted JPS563435A (en) | 1979-06-20 | 1979-06-20 | Manufacture of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS563435A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990234A (en) * | 1982-11-15 | 1984-05-24 | Hitachi Ltd | Magnetic disk |
| US4546035A (en) * | 1983-06-27 | 1985-10-08 | International Business Machines Corporation | Polymeric additives for magnetic coating materials |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53141003A (en) * | 1977-05-16 | 1978-12-08 | Hitachi Ltd | Production of magnetic disc |
-
1979
- 1979-06-20 JP JP7669979A patent/JPS563435A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53141003A (en) * | 1977-05-16 | 1978-12-08 | Hitachi Ltd | Production of magnetic disc |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS563435A (en) | 1981-01-14 |
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