JPH0245245B2 - JIKIKIROKUBAITAINOSEIZOHOHO - Google Patents
JIKIKIROKUBAITAINOSEIZOHOHOInfo
- Publication number
- JPH0245245B2 JPH0245245B2 JP3389481A JP3389481A JPH0245245B2 JP H0245245 B2 JPH0245245 B2 JP H0245245B2 JP 3389481 A JP3389481 A JP 3389481A JP 3389481 A JP3389481 A JP 3389481A JP H0245245 B2 JPH0245245 B2 JP H0245245B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- magnetic
- heat treatment
- temperature
- recording film
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- 239000010408 film Substances 0.000 description 8
- 238000001723 curing Methods 0.000 description 7
- 238000013007 heat curing Methods 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- 239000006247 magnetic powder Substances 0.000 description 4
- 238000003303 reheating Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/842—Coating a support with a liquid magnetic dispersion
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】 本発明は、磁気デイスクの製造方法に関する。[Detailed description of the invention] The present invention relates to a method for manufacturing a magnetic disk.
従来、塗布磁気デイスクは、通常以下の方法で
製造されていた。まず、樹脂およびその溶媒中に
磁性粉を分散した磁性塗料を作成し、その塗料を
基板上に塗布し、乾燥、硬化して磁気記録媒体薄
膜を形成する。この塗膜は一般に表面平坦度が悪
く磁気ヘツドの浮動に支障をきたすため、さらに
表面を切削加工して塗布磁気デイスクに仕上げら
れる。 Conventionally, coated magnetic disks have generally been manufactured by the following method. First, a magnetic paint is prepared by dispersing magnetic powder in a resin and its solvent, and the paint is applied onto a substrate, dried and hardened to form a magnetic recording medium thin film. Since this coating film generally has poor surface flatness, which interferes with the floating of the magnetic head, the surface is further cut to form a coated magnetic disk.
一方、磁気デイスクは、CS／Ｓ（Contact
Start and Stop）時等にヘツド・デイスクが接
触するため、ヘツドに対する摺動強度を必要とす
る。 On the other hand, magnetic disks are CS/S (Contact
Since the head and disk come into contact during start and stop, etc., sliding strength against the head is required.
従来の塗布磁気デイスクは、仕上げ加工時に塗
膜表面に生成する表面変質層（樹脂の破断、加工
歪等を含む）のため摺動強度が弱かつた。本発明
では、上記の製造方法に加えて、表面加工後に塗
膜の加熱アニールをすることにより表面変質層を
改質することにより塗膜の摺動強度を著しく増す
ことができた。 Conventional coated magnetic disks have low sliding strength due to a surface deterioration layer (including resin breakage, processing distortion, etc.) that is generated on the coating surface during finishing. In the present invention, in addition to the above manufacturing method, the sliding strength of the coating film can be significantly increased by modifying the surface-affected layer by heating and annealing the coating film after surface treatment.
表面加工後の熱処理温度は、160〜260℃の範囲
であることが好ましい。さらに始めの熱硬化温度
以上でかつ260℃以上の温度範囲で行なうことが
より好ましい。 The heat treatment temperature after surface treatment is preferably in the range of 160 to 260°C. Furthermore, it is more preferable to perform the curing at a temperature not lower than the initial heat curing temperature and not lower than 260°C.
また本発明は、磁気塗料としてアルミナ粉など
の補強剤を含む場合にも有効である。 The present invention is also effective when the magnetic coating material contains a reinforcing agent such as alumina powder.
さらにまた磁気塗料を塗布後、公知の方法によ
つて磁性粉を磁場配向してから乾燥、熱硬化した
ものに対して、それ以後の工程、すなわち切削加
工以後の工程を行なうことも本発明に含有される
ものである。 Furthermore, it is also within the present invention that after applying the magnetic paint, the magnetic powder is oriented in a magnetic field using a known method, and then the subsequent steps, that is, the steps after cutting, are performed on the material that is dried and thermally hardened. It is contained.
以下実施例を用いて本発明を説明する。 The present invention will be explained below using Examples.
実施例 １
エポキシ樹脂45重量部を、シクロヘキサノン
230重量部で溶解した溶液に、磁性粉（γ−
Fe2O3）100重量部を加えてボールミル混練を７
日間行なつて磁性粉を分散させた後、フエノール
樹脂45重量部、ビニール樹脂としてポリビニール
グラチラールの2.5％シクロヘキサノン溶液350重
量部を添加し磁気デイスク用塗料を調合する。つ
ぎに表面を清浄したアルミニウム基板に上記塗料
を塗布する。このようにして作成された磁性塗膜
を乾燥後、後述の温度で熱硬化し多数の磁気デイ
スクを製造した。Example 1 45 parts by weight of epoxy resin was added to cyclohexanone.
Magnetic powder (γ-
Add 100 parts by weight of Fe 2 O 3 ) and knead in a ball mill for 7 minutes.
After dispersing the magnetic powder for several days, 45 parts by weight of a phenol resin and 350 parts by weight of a 2.5% cyclohexanone solution of polyvinyl glatyral as a vinyl resin are added to prepare a paint for magnetic disks. Next, the above paint is applied to the aluminum substrate whose surface has been cleaned. After drying the magnetic coating film thus prepared, it was thermally cured at the temperature described below to produce a large number of magnetic disks.
上記の要領で作成した試料を表面加工をし膜厚
0.8μｍ、HCAL0.03μｍ仕上げ、その後加熱アニー
ルを行ない塗膜の摺動強度の変化を調べた。摺動
強度は、回転する塗布デイスクに球面（30mmＲ）
アルミナ摺動子を荷重20ｇで加圧摺動させて、塗
膜に傷が発生するまでの摺動回数で評価した。 The sample prepared in the above manner was subjected to surface processing to determine the film thickness.
0.8 μm, H CAL 0.03 μm finish, and then heat annealing was performed to examine changes in the sliding strength of the coating film. The sliding strength is spherical (30mmR) on the rotating application disk.
The alumina slider was slid under pressure with a load of 20 g, and evaluated by the number of times the slider was slid until scratches appeared on the coating film.
以下実験の詳細を説明する。熱硬化温度180℃、
200℃、220℃の温度で２時間硬化した磁気デイス
クのそれぞれについて、仕上げ加工前のデイス
ク、仕上げ加工終了後のデイスク、仕上げ加工後
140℃、160℃、180℃、220℃、240℃、260℃で２
時間加熱処理したデイスクを作成し、摺動強度を
測定した。結果を第１図に示す。図から分かるよ
うに摺動強度は硬化温度によらず加工後に低下す
る。しかし160℃以上の再加熱処理により摺動強
度の回復が認められる。特にそれぞれの硬化温度
以上の温度で熱処理すると塗膜の摺動強度は著し
く回復する。以上のように摺動耐力の大きい磁気
デイスクの製造には、加工後の熱処理が有効であ
る。 The details of the experiment will be explained below. Heat curing temperature 180℃,
For each of the magnetic disks cured at temperatures of 200℃ and 220℃ for 2 hours, the disk before finishing, the disk after finishing, and the disk after finishing.
2 at 140℃, 160℃, 180℃, 220℃, 240℃, 260℃
A disk was prepared by heat treatment for a period of time, and its sliding strength was measured. The results are shown in Figure 1. As can be seen from the figure, the sliding strength decreases after processing regardless of the curing temperature. However, the sliding strength was recovered by reheating at 160°C or higher. In particular, when heat treated at a temperature higher than the respective curing temperature, the sliding strength of the coating film is significantly restored. As described above, post-processing heat treatment is effective for manufacturing magnetic disks with high sliding strength.
最初の熱硬化時間を延長してもある程度の強度
の増加は認められる。しかしながら切削加工後の
再加熱は、それ以上の強度の増加が認められる。
第２図は、最初の熱硬化温度220℃、200℃、180
℃のものについて最初の熱硬化時間を１〜８時間
とし、前記と同様に切削加工して仕上げたものの
摺動強度を示すものである。従つて第２図の硬化
時間２時間の点が、第１図の加工点の点と一致す
る。図にみられるように最初の硬化時間を延長し
てもある程度強度は増加する。しかしながら最初
の硬化時間を４時間としたものは、1a（220℃）、
2a（200℃）3a（180℃）の点の摺動強度であるが、
前記の如く最初の硬化時間２時間、再熱処理時間
２時間のものは（いずれも同じ加熱温度とする）
それぞれ1b、2b、3bの摺動強度を示している。
すなわち、共に合計の加熱時間は、４時間で同じ
であるにもかかわらず加工後に熱処理することに
よつて優れた効果が得られる。 Some increase in strength is observed even if the initial heat curing time is extended. However, when reheating after cutting, an even greater increase in strength is observed.
Figure 2 shows the initial heat curing temperatures of 220℃, 200℃, and 180℃.
℃, the initial heat curing time was 1 to 8 hours, and the sliding strength of the finished product was cut in the same manner as above. Therefore, the point at which the curing time is 2 hours in FIG. 2 coincides with the processing point in FIG. As shown in the figure, even if the initial curing time is extended, the strength increases to some extent. However, when the initial curing time was 4 hours, 1a (220℃),
The sliding strength at points 2a (200℃) and 3a (180℃) is
As mentioned above, the initial curing time is 2 hours and the reheating time is 2 hours (both at the same heating temperature).
The sliding strengths of 1b, 2b, and 3b are shown, respectively.
That is, even though the total heating time for both cases is the same, 4 hours, superior effects can be obtained by performing heat treatment after processing.
この理由は、おそらく加工により樹脂にマイク
ロクラツク及び／又は歪が入り、再熱処理により
歪がとれ、マイクロクラツクが未硬化部分の反応
により再結合するためであろうと推定される。 The reason for this is probably that microcracks and/or distortions are introduced into the resin during processing, the distortions are removed by reheating, and the microcracks are recombined by reaction in the uncured parts.
以上のように本発明の方法は、単なる加熱時間
の延長と異なつて極めて優れた方法である。 As described above, the method of the present invention is different from simply extending the heating time and is an extremely superior method.
第１図及び第２図は、本発明方法により製造し
た磁気デイスクの熱処理温度と摺動強度との関係
を示す図である。
FIGS. 1 and 2 are diagrams showing the relationship between heat treatment temperature and sliding strength of magnetic disks manufactured by the method of the present invention.
Claims (1)
化して磁気記録膜を形成する工程と、該磁気記録
膜表面を平坦化加工する工程と、該平坦化加工工
程後上記磁気記録膜に熱処理を施す工程を有し、
かつ上記熱処理工程における熱処理温度は上記加
工工程時に上記磁気記録膜表面に生じる表面変質
層を減少できる温度であることを特徴とする磁気
記録媒体の製造方法。 ２ 上記熱処理温度は上記熱硬化時の加熱温度以
上である特許請求の範囲第１項記載の磁気記録媒
体の製造方法。[Scope of Claims] 1. A step of applying a magnetic coating material onto a non-magnetic substrate, drying and curing with heat to form a magnetic recording film, a step of flattening the surface of the magnetic recording film, and a step of flattening the surface of the magnetic recording film. After that, the magnetic recording film is subjected to heat treatment,
A method for manufacturing a magnetic recording medium, characterized in that the heat treatment temperature in the heat treatment step is a temperature that can reduce a surface-altered layer generated on the surface of the magnetic recording film during the processing step. 2. The method of manufacturing a magnetic recording medium according to claim 1, wherein the heat treatment temperature is higher than the heating temperature during the thermosetting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3389481A JPH0245245B2 (en) | 1981-03-11 | 1981-03-11 | JIKIKIROKUBAITAINOSEIZOHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3389481A JPH0245245B2 (en) | 1981-03-11 | 1981-03-11 | JIKIKIROKUBAITAINOSEIZOHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57150138A JPS57150138A (en) | 1982-09-16 |
| JPH0245245B2 true JPH0245245B2 (en) | 1990-10-08 |
Family
ID=12399230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3389481A Expired - Lifetime JPH0245245B2 (en) | 1981-03-11 | 1981-03-11 | JIKIKIROKUBAITAINOSEIZOHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0245245B2 (en) |
-
1981
- 1981-03-11 JP JP3389481A patent/JPH0245245B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57150138A (en) | 1982-09-16 |
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