JPH03212833A - Production of magneto-optical recording medium - Google Patents
Production of magneto-optical recording mediumInfo
- Publication number
- JPH03212833A JPH03212833A JP787490A JP787490A JPH03212833A JP H03212833 A JPH03212833 A JP H03212833A JP 787490 A JP787490 A JP 787490A JP 787490 A JP787490 A JP 787490A JP H03212833 A JPH03212833 A JP H03212833A
- Authority
- JP
- Japan
- Prior art keywords
- substrates
- coated
- melt adhesive
- hot melt
- magneto
- 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
- 239000010410 layer Substances 0.000 claims abstract description 38
- 239000004831 Hot glue Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000011241 protective layer Substances 0.000 claims abstract description 6
- 229920000728 polyester Polymers 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 16
- 239000011247 coating layer Substances 0.000 claims description 8
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 2
- IKZZIQXKLWDPCD-UHFFFAOYSA-N but-1-en-2-ol Chemical compound CCC(O)=C IKZZIQXKLWDPCD-UHFFFAOYSA-N 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 17
- 230000001070 adhesive effect Effects 0.000 abstract description 17
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 238000000151 deposition Methods 0.000 abstract 1
- 238000010030 laminating Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 206010040844 Skin exfoliation Diseases 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- -1 TbFeCo Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate group Chemical group C(C(=C)C)(=O)[O-] CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は光磁気記録媒体の製造方法に係り、特に透明基
板上に記録層を形成してなる光磁気記録媒体をホットメ
ルト接着剤を用いて貼合せて光磁気記録媒体を形成する
方法の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a magneto-optical recording medium, and in particular, a method for manufacturing a magneto-optical recording medium in which a recording layer is formed on a transparent substrate using a hot melt adhesive. The present invention relates to an improvement in a method for laminating magneto-optical recording media.
［従来の技術〕
光学式ビデオディスク、光学式オーディオディスク、Ｄ
ＲＡＷディスクにおける光情報記録媒体は、プラスチッ
クの基板上に金属記録層、色素記録層等を設けたものが
基本であり、記録膜の光ビームによる溶融、昇華を利用
した孔あけタイプ、結晶と非晶質の間の相転移を利用し
たタイプ、磁気光学効果を利用した光磁気タイプなどが
知られている。何れのタイプにおいても、通常、記録層
へのゴミ付着、ギズ形成などを防止するために、光透過
性基板上に記録層を他の補助層とともに形成し、これら
の層を内側にして接着剤で貼合せた構成とし、基板を通
して記録再生を行なっている。この場合、接着剤として
は、無溶剤で記録層への悪影響がなく、作業工程も簡単
なホットメルト型接着剤が用いられている。そして、ホ
ットメルト型接着剤を塗布した後の貼合せに際しては、
コールドプレス機が用いられている。[Prior art] Optical video disc, optical audio disc, D
The optical information recording medium in a RAW disk is basically a plastic substrate with a metal recording layer, a dye recording layer, etc.; Known types include a type that utilizes phase transition between crystals, and a magneto-optical type that utilizes the magneto-optical effect. In either type, the recording layer is usually formed on a light-transmissive substrate along with other auxiliary layers and bonded with these layers inside in order to prevent dust from adhering to the recording layer and formation of scratches. The structure is such that they are bonded together using a chemical agent, and recording and playback is performed through the substrate. In this case, the adhesive used is a hot-melt adhesive that is solvent-free, has no adverse effect on the recording layer, and has a simple working process. And when laminating after applying hot melt adhesive,
A cold press machine is used.
［発明が解決しようとするｉ！題］
ホットメルト型接着剤で貼合せた場合、接着後の媒体の
耐熱性、耐久性が十分ではなく、貼合せた媒体のズレ、
或いは剥離が発生する。即ち、通常、接着剤の塗布に際
してはロールコータを用いるが、そのままでは接着剤層
の膜厚ムラが大きい（膜厚分布が広い）ために、接着剤
の密着力が弱く、貼合せて得られる媒体は高温時に媒体
がズしたり、剥離したりする。また、機械的特性も悪い
。特に膜厚分布が著しく大きくなると、エアーなどを巻
き込み腐食などを発生する上に、機械的特性が著しく悪
化し、信頼性が低下するなどの問題が生ずる。[The invention attempts to solve i! [Problem] When laminating with hot melt adhesive, the heat resistance and durability of the media after bonding are insufficient, and the bonded media may shift,
Or peeling occurs. In other words, a roll coater is normally used to apply adhesive, but as it is, the adhesive layer has a large thickness unevenness (wide thickness distribution) and the adhesion of the adhesive is weak. The media may sag or peel off when the temperature is high. It also has poor mechanical properties. In particular, when the film thickness distribution becomes extremely large, problems such as entrainment of air and corrosion occur, as well as a marked deterioration of mechanical properties and a decrease in reliability.
本発明は上記従来の、ホットメルト型接着剤を用いて光
磁気記録媒体を貼合せて光磁気記録媒体を製造する際の
問題点を解決する光磁気記録媒体の製造方法を提供する
ことを目的とする。An object of the present invention is to provide a method for manufacturing a magneto-optical recording medium that solves the above-mentioned conventional problems in manufacturing a magneto-optical recording medium by bonding magneto-optical recording media together using a hot melt adhesive. shall be.
［課題を解決するための手段］
請求項（１）の光磁気記録媒体の製造方法は、透明基板
上に記録層或いは記録層及び保護層を順次被着した面に
、ホットメルト接着剤を塗布し、塗布面を対向させて２
枚の基板を貼合せて光磁気記録媒体を製造する方法にお
いて、貼合せ前或いは貼合せ中に該塗布面を加熱するこ
とを特徴とする
請求項（２）の光磁気記録媒体の製造方法は、上記請求
項（１）の方法において、ホットメルト接着剤がゴム系
、ポリエステル系、ポリビニルアルコール（ＥＶＡ）系
、ポリオレフィン系又はウレタン系のホットメルト接着
剤であることを特徴とする
請求項（３）の光磁気記録媒体の製造方法は、上記請求
項（１）又は（２）の方法において、ホットメルト接着
剤の塗布層厚さが１０〜１００μの範囲であり、表面の
中心線粗さが０．０５μ以上１０μ未満の範囲であるこ
とを特徴とする。[Means for Solving the Problem] The method for manufacturing a magneto-optical recording medium according to claim (1) includes applying a hot melt adhesive to a transparent substrate on which a recording layer or a recording layer and a protective layer are sequentially deposited. 2, with the coated surfaces facing each other.
The method of manufacturing a magneto-optical recording medium according to claim (2), wherein the method of manufacturing a magneto-optical recording medium by laminating two substrates, the coated surface being heated before or during lamination. In the method according to claim (1), the hot melt adhesive is a rubber-based, polyester-based, polyvinyl alcohol (EVA)-based, polyolefin-based, or urethane-based hot melt adhesive. ) is the method of manufacturing a magneto-optical recording medium according to claim (1) or (2), wherein the thickness of the coated layer of the hot melt adhesive is in the range of 10 to 100μ, and the center line roughness of the surface is in the range of 10 to 100μ. It is characterized in that it is in the range of 0.05μ or more and less than 10μ.
ホットメルト接着剤を塗布した後、この塗布された接着
剤を加熱することにより接着剤の層厚が均一になると共
に、接着剤層表面も平滑になる。After applying the hot melt adhesive, the applied adhesive is heated to make the adhesive layer uniform in thickness and to make the surface of the adhesive layer smooth.
このため、基板同志の密着性が改善され、貼合せ強度が
高まる。この理由については、接着剤を加熱することに
よりその粘性が低下するためであると推察される。Therefore, the adhesion between the substrates is improved and the bonding strength is increased. The reason for this is presumed to be that heating the adhesive lowers its viscosity.
なお、請求項（２）、（３）の如くすると貼合せ強度が
さらに高いものとなる。Note that according to claims (2) and (3), the bonding strength becomes even higher.
本発明において、記録層を形成する透明基板としては、
ポリカーボネート樹脂、アクリル樹脂等の樹脂基板が用
いられる。また、記録層としては、一般に公知の光磁気
記録の層構成のものを用いることができる０例えば、Ｔ
ｂＦｅ。In the present invention, the transparent substrate forming the recording layer is
A resin substrate such as polycarbonate resin or acrylic resin is used. Further, as the recording layer, a layer structure of generally known magneto-optical recording can be used. For example, T
bFe.
ＴｂＦｅＣｏ、ＴｂＣｏ、ＤｙＦｅＣｏ等の希土類と遷
移金属との晶質磁性合金、ＭｎＢ１、ＭｎＣｕＢ１等の
多結晶垂直磁化膜等を用いることができる。光磁気記録
層としては、これらの単−層を用いても良く、また、Ｇ
ｄ Ｔ ｂ Ｆ ｅ ／ Ｔ ｂのように２層以上の
記録層を重ねたものとしても良い。A crystalline magnetic alloy of a rare earth element and a transition metal such as TbFeCo, TbCo, and DyFeCo, a polycrystalline perpendicular magnetization film such as MnB1, MnCuB1, etc. can be used. These single layers may be used as the magneto-optical recording layer, and G
It is also possible to have two or more recording layers stacked like dTbFe/Tb.
上記基板と記録層との間には干渉層を設けることもでき
る。干渉層は、高屈折率の透明膜による光の干渉効果を
利用して反射率を落とすことでノイズを低下させ、Ｃ／
Ｎ比を向上させるためのものである。干渉層としては、
金属酸化物や金属窒化物が用いられる。An interference layer may also be provided between the substrate and the recording layer. The interference layer uses the light interference effect of a transparent film with a high refractive index to lower the reflectance, thereby reducing noise.
This is to improve the N ratio. As an interference layer,
Metal oxides and metal nitrides are used.
記録層の干渉層と反対側の面には、干渉層と同様の材質
よりなる誘電体層（無機保護層）を設けるのが望ましい
。It is desirable to provide a dielectric layer (inorganic protective layer) made of the same material as the interference layer on the surface of the recording layer opposite to the interference layer.
反射層を設ける構造の媒体では、記録層に接して、又は
厚さ数百への誘電体層を介して高反射率の金属（例えば
、Ａ１、Ｃｕ等）の単体、又はその合金を反射層として
設ける。In media with a structure in which a reflective layer is provided, a highly reflective metal (for example, A1, Cu, etc.) or an alloy thereof is used as a reflective layer in contact with the recording layer or via a dielectric layer up to several hundred thick. Established as
反射層の更に外層には、キズ及び酸化防止の目的で有機
保護層を設けることも可能である。この有機保護層は、
例えば、紫外線照射硬化型のアクリレート又はメタアク
リレート基を複数有する化合物を用いて、スピンコータ
、スプレー ロールコータ、フローコータ法、浸漬法等
のコーテイング法で均一に塗布することにより形成する
ことがで包る。塗膜硬化のために照射する放射線として
は、紫外線、電子線が挙げられるが、紫外線が望ましい
。It is also possible to provide an organic protective layer on the outer layer of the reflective layer for the purpose of preventing scratches and oxidation. This organic protective layer is
For example, it can be formed by uniformly applying a UV radiation-curable compound having multiple acrylate or methacrylate groups using a coating method such as a spin coater, spray roll coater, flow coater method, or dipping method. . Examples of the radiation irradiated for curing the coating include ultraviolet rays and electron beams, but ultraviolet rays are preferable.
本発明において使用されるホットメルト接着剤としては
、ゴム系、ポリエステル系、ＥＶＡ系、ポリオレフィン
系或いはウレタン系のホットメルト接着剤などが挙げら
れる。このようなホットメルト接着剤の塗布に用いる塗
布装置としては、各種のホットメルトコータやアプリケ
ータを採用することができるが、特にロールコータが好
ましく用いられる。ロールコータにより塗布する場合、
接着剤塗布層の厚さは１０〜１００μが好ましく、特に
１０〜６０μが好ましい。Examples of the hot melt adhesive used in the present invention include rubber-based, polyester-based, EVA-based, polyolefin-based, or urethane-based hot melt adhesives. Various hot melt coaters and applicators can be employed as the coating device used for coating such a hot melt adhesive, but a roll coater is particularly preferably used. When applying with a roll coater,
The thickness of the adhesive coating layer is preferably 10 to 100 microns, particularly preferably 10 to 60 microns.
このようにして塗布した接着剤塗布層の加熱温度は４０
〜１００℃が好ましく、特に４５〜８５℃とするのが望
ましい。加熱温度が４０℃未満では、本発明による十分
な効果が得られず、１００℃を超えると光磁気特性に影
響を及ぼすおそれがある。The heating temperature of the adhesive coating layer applied in this way was 40
The temperature is preferably from 100°C to 45°C to 85°C. If the heating temperature is less than 40°C, the sufficient effect of the present invention cannot be obtained, and if it exceeds 100°C, there is a risk that the magneto-optical properties will be affected.
加熱装置としては熱風乾燥炉、電熱ヒータ或いはホット
プラスタなどが使用でき、加熱方法としては
■ 媒体を、一定に加温された雰囲気下に保持する。As the heating device, a hot air drying oven, electric heater, hot plaster, etc. can be used, and the heating method is as follows: (1) The medium is maintained in a constant heated atmosphere.
■ 媒体を、一定に加温された雰囲気内を通過させる。■ The medium is passed through a constantly heated atmosphere.
■ 媒体に熱風を吹き付ける。■ Blow hot air onto the medium.
等が挙げられる。etc.
本発明においては、このような加熱処理により、ホット
プレス接着剤の塗布層表面の中心線平均粗さ（Ｒａ）が
０．０５μ以上１０μｍ未満となるようにするのが好ま
しい。In the present invention, it is preferable that the centerline average roughness (Ra) of the surface of the coated layer of the hot press adhesive is 0.05 μm or more and less than 10 μm by such heat treatment.
接着剤塗布後、媒体の貼合せに用いるプレス機としては
、コールドプレス機又はホットプレス機を用いることが
できるが、貼合せに際してホットプレス機を使用すると
加熱工程と貼合せ工程とを同時に実施することができ、
非常に有利である。After applying the adhesive, a cold press machine or a hot press machine can be used as the press machine for laminating the media, but if a hot press machine is used for laminating, the heating process and the laminating process will be performed at the same time. It is possible,
Very advantageous.
［実施例］
以下に実施例及び比較例を挙げて本発明をより具体的に
説明するが、本発明はその要旨を超えない限り、以下の
実施例に限定されるものではない。[Examples] The present invention will be described in more detail with reference to Examples and Comparative Examples below, but the present invention is not limited to the following Examples unless it exceeds the gist thereof.
実施例１
透明基板として中央に直径１５ｍｍの孔を有する直径１
３０ｍｍ、板厚１．２ｍｍの案内溝付き円形平板状のポ
リカーボネート射出成形基板を用い、その上に以下の層
構成の記録膜（カッコ内は膜厚を示す、）を連続スパッ
タ装置で成膜して記録ディスクを製造した。Example 1 Diameter 1 with a hole with a diameter of 15 mm in the center as a transparent substrate
A circular flat polycarbonate injection molded substrate with a diameter of 30 mm and a plate thickness of 1.2 mm with a guide groove was used, and a recording film having the following layer structure (the film thickness is shown in parentheses) was formed on it using a continuous sputtering device. A recording disk was manufactured using the following steps.
５ｆＮｘ（７５０Ａ ）／ＴｂＦｅＣｏ（３００Ａ ）
、／ ＡＪ：１Ｓｉ（４００Ａ ）／ＳｉＮｘ （３５
０Ａ ）
この記録ディスクの記録膜上に、ロールコータ（松下工
業■社製ｒＤＴＷ−１３０Ｊ ）を用いてホットメルト
接着剤（セメダイン社製；商品名「セメダインＨＭ−４
５８Ｊ ）を５０μの厚みに塗布した。なお、塗布ロー
ラ温度は１２０℃とした６次に、この塗布面に温度セン
ナにより８０℃に制御しながらホットプラスタ（官本製
作所製）で熱風を吹き付けた。5fNx (750A)/TbFeCo (300A)
,/AJ:1Si(400A)/SiNx(35
0A) A hot melt adhesive (manufactured by Cemedine Co., Ltd.; trade name: "Cemedine HM-4") was applied onto the recording film of this recording disk using a roll coater (rDTW-130J, manufactured by Matsushita Kogyo Co., Ltd.).
58J) was applied to a thickness of 50μ. The temperature of the coating roller was 120° C. 6 Next, hot air was blown onto the coated surface using a hot plaster (manufactured by Kanmoto Seisakusho) while controlling the temperature to 80° C. using a temperature sensor.
このように加熱処理した２枚の記録ディスクの接着剤塗
布面を内側にして対向するように合わせ、プレス装置で
加圧して貼合せた。The two heat-treated recording disks were placed so as to face each other with the adhesive-coated surfaces facing inside, and were bonded together by pressing with a press device.
得られた光磁気記録媒体を８５℃−８５ＲＨ％の雰囲気
下に５００時間保持した結果、エラーレイトの増加は認
められず良好であった。また、外観上も問題なく、板ズ
レ及び剥れはなかった。When the obtained magneto-optical recording medium was kept in an atmosphere of 85° C. and 85 RH% for 500 hours, no increase in error rate was observed and the result was good. In addition, there were no problems in terms of appearance, and there were no sheet deviations or peelings.
また、本実施例方法で加熱処理した接着剤塗布層表面の
中心線平均粗さ（Ｒａ）を東京精密■社製「サーフコム
」で測定したところ、中心線平均粗さ（Ｒａ）は７μで
あった。これらの結果を第１表に示す。また、接着剤塗
布層表面の断面曲線を第１図に示す。In addition, when the centerline average roughness (Ra) of the surface of the adhesive coating layer heat-treated by the method of this example was measured using "Surfcom" manufactured by Tokyo Seimitsu ■, the centerline average roughness (Ra) was 7μ. Ta. These results are shown in Table 1. Further, a cross-sectional curve of the surface of the adhesive coating layer is shown in FIG.
比較例１
接着剤塗布後、加熱処理を行なわなかったこと以外は実
施例１と同様にして光磁気記録媒体を製造した。Comparative Example 1 A magneto-optical recording medium was produced in the same manner as in Example 1, except that no heat treatment was performed after applying the adhesive.
得られた光磁気記録媒体を８５℃−８５ＲＨ％の雰囲気
下に５００時間保持した結果、エラーレイトが２〜３倍
に増加し、板ズレが若干発生した。また、実施例１と同
様にして接着剤塗布層表面の中心線平均粗さ（Ｒａ）を
測定したところ、中心線平均粗さ（Ｒａ）は１０μであ
った。これらの結果を第１表に示す。また、接着剤塗布
層表面の断面曲線を第２図に示す。As a result of holding the obtained magneto-optical recording medium in an atmosphere of 85° C. and 85 RH% for 500 hours, the error rate increased by 2 to 3 times and some plate misalignment occurred. Further, when the center line average roughness (Ra) of the surface of the adhesive coating layer was measured in the same manner as in Example 1, the center line average roughness (Ra) was 10 μm. These results are shown in Table 1. Further, a cross-sectional curve of the surface of the adhesive coating layer is shown in FIG.
第１表
［発明の効果］
以上詳述した通り、本発明の光磁気記録媒体の製造方法
によれば、媒体のズレや剥離がなく、耐熱性、耐久性、
機械的特性に優れ、信頼性の高い光磁気記録媒体を製造
することが可能とされる。Table 1 [Effects of the Invention] As detailed above, according to the method for manufacturing a magneto-optical recording medium of the present invention, there is no displacement or peeling of the medium, and the heat resistance, durability,
It is possible to manufacture a highly reliable magneto-optical recording medium with excellent mechanical properties.
特に、請求項（２）又は（３）の方法を採用することに
より、より優れた効果が得られる。In particular, better effects can be obtained by employing the method of claim (2) or (3).
第１図及び′ｓ２図はそれぞれ実施例１及び比較例１で
得られた接着剤塗布層表面の断面曲線を示す図である。1 and 's2 are diagrams showing cross-sectional curves of the surface of the adhesive coating layer obtained in Example 1 and Comparative Example 1, respectively.
Claims (3)
次被着した面に、ホットメルト接着剤を塗布し、塗布面
を対向させて２枚の基板を貼合せて光磁気記録媒体を製
造する方法において、貼合せ前或いは貼合せ中に該塗布
面を加熱することを特徴とする光磁気記録媒体の製造方
法。(1) Hot-melt adhesive is applied to the surface of the transparent substrate on which the recording layer or the recording layer and the protective layer are sequentially applied, and the two substrates are bonded together with the coated surfaces facing each other to form a magneto-optical recording medium. A method for manufacturing a magneto-optical recording medium, which comprises heating the coated surface before or during lamination.
エチルビニルアルコール系、ポリオレフィン系又はウレ
タン系のホットメルト接着剤である特許請求の範囲第１
項に記載の方法。(2) The hot melt adhesive is rubber-based, polyester-based,
Claim 1 is an ethyl vinyl alcohol-based, polyolefin-based or urethane-based hot melt adhesive.
The method described in section.
μの範囲であり、表面の中心線平均粗さが０．０５μ以
上１０μ未満の範囲である特許請求の範囲第１項又は第
２項に記載の方法。(3) The thickness of the hot melt adhesive coating layer is 10 to 100
The method according to claim 1 or 2, wherein the centerline average roughness of the surface is in the range of 0.05μ or more and less than 10μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP787490A JPH03212833A (en) | 1990-01-17 | 1990-01-17 | Production of magneto-optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP787490A JPH03212833A (en) | 1990-01-17 | 1990-01-17 | Production of magneto-optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03212833A true JPH03212833A (en) | 1991-09-18 |
Family
ID=11677770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP787490A Pending JPH03212833A (en) | 1990-01-17 | 1990-01-17 | Production of magneto-optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03212833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10808138B2 (en) | 2015-03-26 | 2020-10-20 | Centre National De La Recherche Scientifique | Metal-polymer composite material |
-
1990
- 1990-01-17 JP JP787490A patent/JPH03212833A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10808138B2 (en) | 2015-03-26 | 2020-10-20 | Centre National De La Recherche Scientifique | Metal-polymer composite material |
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