JPS60261046A - Method for forming protection curing coating film for optical disc - Google Patents

Method for forming protection curing coating film for optical disc

Info

Publication number
JPS60261046A
JPS60261046A JP11591984A JP11591984A JPS60261046A JP S60261046 A JPS60261046 A JP S60261046A JP 11591984 A JP11591984 A JP 11591984A JP 11591984 A JP11591984 A JP 11591984A JP S60261046 A JPS60261046 A JP S60261046A
Authority
JP
Japan
Prior art keywords
curing
optical disc
coating
layer
film material
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
Application number
JP11591984A
Other languages
Japanese (ja)
Inventor
Tetsuya Akiyama
哲也 秋山
Masami Uchida
内田　正美
Yoshihiro Minamide
南出　整宏
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11591984A priority Critical patent/JPS60261046A/en
Publication of JPS60261046A publication Critical patent/JPS60261046A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • G11B7/2542—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins

Landscapes

  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE:To form a protection film of 2-layer structure without uneven coating by applying a high moistureproof curing coating film material to one side of an optical disc by means of spin coating, curing the material in half way, applying a high scratchproof curing coating film material to both sides of the optical disc by spin coating and curing the material completely. CONSTITUTION:An epoxyacrylate group material functioning as an ultraviolet ray curing resin is applied to both sides of the optical disc 1 as the high moistureproof curing film material 2 by means of spin coating and the material is curred in midway by irradiating an ultraviolet ray for a short time. Further, a denatured acrylate group material functioning as an ultraviolet ray curing resin is applied to both sides of the optical disc by spin coating, the high moistureproof curing film material 2 and the high scratchproof curing film material 3 are cured completely by irradiating again the ultraviolet ray at the same time to form a protection curing film of two layer structure. In applying the 2nd layer curing film material 3, uneven coating of the 2nd layer curing film material 3 is hardly caused by applying the 1st layer in the half-curing state.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、光ディスクの保護硬化被膜の形成方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for forming a protective hardened coating for an optical disc.

従来例の構成とその問題点 一般に光ディスクは、ガラス、プラスチック等の透明基
板上に情報媒体層を設けたもので、再生時にはレーザ光
を照射し、前記情報媒体層がらの反射光または透過光に
よって記録されている情報を読み取るものである。この
光ディスクにおいて、前記情報媒体層に傷がつくと、情
報の記録・再生時に大きな支障となる。また、前記情報
媒体層が空気中の湿気を吸収すると劣化し易くなる傾向
がある。したがって、前記情報媒体層を機械的損傷及び
湿度から保護する必要がある。Conventional Structures and Problems Generally, an optical disk has an information medium layer provided on a transparent substrate made of glass, plastic, etc. During playback, a laser beam is irradiated and the light reflected or transmitted from the information medium layer is used. It reads recorded information. In this optical disc, if the information medium layer is scratched, it will cause a big problem when recording and reproducing information. Furthermore, when the information medium layer absorbs moisture in the air, it tends to deteriorate easily. Therefore, it is necessary to protect the information carrier layer from mechanical damage and humidity.

情報媒体層を保護する方法として、前記情報媒体層の上
にもう一枚の透明基板を貼り合わせたもの、あるいは前
記情報媒体層の上に樹脂材料等による硬化被膜を設けた
もの等が一般的である。Common methods for protecting the information medium layer include laminating another transparent substrate on top of the information medium layer, or providing a hardened film made of a resin material or the like on top of the information medium layer. It is.

前者は工程数及び経費の増加等の問題があり、製造上後
者の方が有利である。ここで、後者の方法についてさら
に詳しく説明する。The former has problems such as an increase in the number of steps and costs, and the latter is more advantageous in terms of manufacturing. Here, the latter method will be explained in more detail.

この情報媒体層の上に硬化被膜を設ける方法として、例
えば紫外線硬化性の液体有機材料を塗布した後、紫外線
を照射して硬化させる方法がよく知られており、円盤状
の基板上に液体材料を塗布する方法としては、スピンコ
ードによる方法が最も生産性がよく、一般に行なわれて
いる。A well-known method for forming a cured film on this information medium layer is, for example, to apply an ultraviolet-curable liquid organic material and then cure it by irradiating it with ultraviolet rays. As a method of coating, a method using a spin cord has the highest productivity and is generally used.

ここで、硬化被膜表面に傷がついた場合、その傷によっ
て、記録・再生時にレーザ光が分散され、正常に情報媒
体層上に集光されなくなるので、光ディスクとしての性
能が低下する。したがって、硬化被膜は防湿性と共に耐
傷性を有することが必要である。透明で平滑な表面を形
成できる硬化被膜材料として、例えばニトロセルロース
ラッカー。If the surface of the cured film is scratched, the scratches will cause the laser light to be dispersed during recording and reproduction, and will not be properly focused on the information medium layer, resulting in a decrease in performance as an optical disc. Therefore, it is necessary for the cured film to have moisture resistance as well as scratch resistance. For example, nitrocellulose lacquer is a cured coating material that can form a transparent and smooth surface.

メラミン樹脂系材料、エポキシ樹脂系材料、ポリウレタ
ン樹脂系材料、ポリシロキサン樹脂系材料。Melamine resin materials, epoxy resin materials, polyurethane resin materials, polysiloxane resin materials.

アクリル樹脂系材料等がある。しかし、高い防湿性と耐
傷性を同時に兼ね備えた硬化被膜材料は知られてい々い
。そこで、最初に情報媒体層の上に防湿性の高い硬化被
膜を設け、次にこの光ディスクの両面に耐傷性の高い硬
化被膜を設けることが提案されている。ただし、透明基
板の防湿性が低い場合には、両面に防湿性の高い硬化被
膜を設ける必要がある。There are acrylic resin materials, etc. However, there are few known cured film materials that have both high moisture resistance and scratch resistance. Therefore, it has been proposed to first provide a hardened film with high moisture resistance on the information medium layer, and then provide hardened films with high scratch resistance on both sides of the optical disc. However, if the transparent substrate has low moisture resistance, it is necessary to provide a cured film with high moisture resistance on both surfaces.

、ところが、従来性なわれている方法、すなわち光ディ
スクの片面または両面に防湿性の高い硬化被膜材料を塗
布し、これを完全に硬化させた後、耐傷性の高い硬化被
膜材料を塗布し、これを完全に硬化させるという方法は
次のような問題点を有している。防湿性の高い被膜上に
塗布された液体はその被膜との親和性が低くなるので接
触角が大きくなってはじき易くなる傾向にあシ、防湿性
被膜上に塗布された耐傷性被膜材料に塗りむらが発生し
易い。これは、光ディスクの外周端面で最も顕著に現わ
れる。この塗シむらによって光ディスクの外観は大きく
損なわれ、商品価値が著しく低下する。極端な場合には
、情報の記録・再生を行なう領域にも塗シむらが発生し
、その塗りむらによって、記録・再生時にレーザ光が分
散され、光ディスクとしての性能が低下する。However, the conventional method is to apply a highly moisture-proof hardened coating material to one or both sides of an optical disc, completely cure it, and then apply a highly scratch-resistant hardened coating material. The method of completely curing has the following problems. A liquid applied on a highly moisture-proof coating has a low affinity with the coating, so the contact angle increases and the liquid tends to be easily repelled. Unevenness tends to occur. This is most noticeable at the outer peripheral end face of the optical disc. This uneven coating significantly impairs the appearance of the optical disc and significantly reduces its commercial value. In extreme cases, uneven coating occurs even in areas where information is recorded and reproduced, and the uneven coating disperses laser light during recording and reproduction, degrading the performance of the optical disc.

第１図は、この従来方法によって二層の硬化被膜を形成
した光ディスクの外周端の一部を断面で示す斜視図であ
シ、光ディスク１の両面に高防湿性硬化被膜２を形成し
た後、高耐傷性硬化被膜３を形成した状態を示す。この
時、高耐傷硬化被膜３に塗シむらが生じている。FIG. 1 is a perspective view showing a part of the outer circumferential edge of an optical disc on which a two-layer hardened film is formed by this conventional method. A state in which a highly scratch-resistant cured film 3 is formed is shown. At this time, coating unevenness has occurred in the highly scratch-resistant hardened coating 3.

発明の目的 本発明は、以上の欠点を解消するものてあり、高性能で
、外観が良く、商品価値の高い光ディスクを製造するだ
めの、保護硬化被膜の形成方法を提供するものである。OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks, and provides a method for forming a protective cured film for producing optical discs with high performance, good appearance, and high commercial value.

発明の構成　一 本発明による光ディスクの保護硬化被膜の形成方法は、
光ディスクの少なくとも情報媒体層を有する面に、スピ
ンコードによって高防湿性硬化被膜材料を塗布し、前記
高防湿性硬化被膜材料を半硬化させた後、前記光ディス
クの両面に、スピンコードによって、高耐傷性硬化被膜
材料を塗布し、その後、前記高防湿性硬化被膜材料およ
び前記高耐湿性硬化被膜材料を完全に硬化させることに
よって、塗りむらなく、二層構造の保護硬化被膜を形成
するものであり、高性能で、外観が良く、商品価値の高
い光ディスクを製造することができるものである。Composition of the Invention A method for forming a protective cured film for an optical disc according to the present invention includes:
A highly moisture-proof cured coating material is applied to at least the surface of the optical disk having the information medium layer using a spin code, and after the highly moisture-proof cured coating material is semi-cured, a highly scratch-resistant coating is applied to both sides of the optical disk using a spin code. A protective hardened film with a two-layer structure is formed without uneven coating by applying a highly moisture-resistant hardened film material and then completely curing the highly moisture-resistant hardened film material and the highly moisture-resistant hardened film material. , it is possible to manufacture optical discs with high performance, good appearance, and high commercial value.

実施例の説明 以下、本発明の一実施例について図面を参照しヒ説明す
る。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

従来例と同一構成要素は同一番号で示しである。Components that are the same as those of the conventional example are indicated by the same numbers.

第２図は、光ディスク１の両面に、まず、高防湿性硬化
被膜材料２として、紫外線硬化性樹脂であるエポキシア
クリレート系の材料をスピンコードによって塗布し、こ
れに紫外線を短時間照射することによって半硬化させる
。さらに、この光ディスクの両面に高耐傷性硬化被膜材
料３として、紫外線硬化性樹脂である変成アクリレート
系材料をスピンコードによって塗布し、再び紫外線を照
射することにより、高防湿性硬化被膜材料２および高耐
傷性硬化被膜材料３を同時に完全に硬化させることによ
って、二層構造の保護硬化被膜を形成する。FIG. 2 shows that an epoxy acrylate material, which is an ultraviolet curable resin, is first applied as a highly moisture-proof cured coating material 2 on both sides of an optical disc 1 using a spin cord, and then irradiated with ultraviolet rays for a short period of time. Let it semi-cure. Furthermore, a modified acrylate material, which is an ultraviolet curable resin, is applied as a highly scratch-resistant cured coating material 3 on both sides of the optical disc using a spin cord, and then irradiated with ultraviolet rays again. By simultaneously completely curing the scratch-resistant cured coating material 3, a two-layer protective cured coating is formed.

この場合、第二層の硬化被膜材料を塗布する際に、第一
層の硬化被膜の表面が半硬化状態であるため、第一層と
第二層との親和性が高く、第二層の硬化被膜材料３の塗
シむらがほとんどなくなったＱ 発明の効果 以上のように、本発明の方法によれば、塗りむらなく、
二層構造の保護硬化被膜を形成することができる。これ
は、光ディスクの性能を向上させ商品価値を高めるもの
である。In this case, when applying the second layer cured coating material, since the surface of the first layer cured coating is in a semi-cured state, the affinity between the first layer and the second layer is high, and the second layer Q: Almost no uneven coating of the cured coating material 3
A protective cured film with a two-layer structure can be formed. This improves the performance of optical discs and increases their commercial value.

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

第１図は、従来例における光ディスクの保護硬化被膜形
成方法による二層の硬化被膜を形成した光ディスクの要
部を一部断面で示す斜視図、第２図は、本発明の光ディ
スクの保護硬化被膜形成方法による二層の硬化被膜を形
成した光ディスクの要部を一部断面で示す斜視図である
。・１・・・・・・光ディスク、２・・・・・・高防湿
性硬化被膜、３・・・・・・高耐傷性硬化被膜。FIG. 1 is a partially cross-sectional perspective view showing the essential parts of an optical disc on which a two-layer hardened film has been formed using a conventional method for forming a protective hardened film on an optical disc, and FIG. 2 shows a protective hardened film of an optical disc according to the present invention. FIG. 2 is a perspective view, partially in cross section, of a main part of an optical disc on which a two-layer cured film is formed using a forming method. 1... Optical disc, 2... Highly moisture-proof hardened film, 3... Highly scratch-resistant hardened film.

Claims (1)

【特許請求の範囲】[Claims] 光ディスクの少なくとも一方の面に、スピンコードによ
って、高防湿性硬化被膜材料を塗布し、前記高防湿性硬
化被膜材料を半硬化させた後、前記光ディスクの両面に
、スピンコードによって、高耐傷性硬化被膜材料を塗布
し、その後、前記高防湿性硬化被膜材料および前記高耐
傷性硬化被膜材料を完全に硬化させることを特徴とする
光ディスクの保護硬化被膜形成方法。A highly moisture-proof hardened coating material is applied to at least one surface of the optical disk using a spin cord, and after the highly moisture-proof hardened coating material is semi-cured, a highly scratch-resistant hardened coating material is applied to both sides of the optical disk using a spin cord. A method for forming a protective cured film for an optical disc, comprising applying a coating material, and then completely curing the highly moisture-proof cured coating material and the highly scratch-resistant cured coating material.
JP11591984A 1984-06-06 1984-06-06 Method for forming protection curing coating film for optical disc Pending JPS60261046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11591984A JPS60261046A (en) 1984-06-06 1984-06-06 Method for forming protection curing coating film for optical disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11591984A JPS60261046A (en) 1984-06-06 1984-06-06 Method for forming protection curing coating film for optical disc

Publications (1)

Publication Number Publication Date
JPS60261046A true JPS60261046A (en) 1985-12-24

Family

ID=14674456

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11591984A Pending JPS60261046A (en) 1984-06-06 1984-06-06 Method for forming protection curing coating film for optical disc

Country Status (1)

Country Link
JP (1) JPS60261046A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004247015A (en) * 2003-02-17 2004-09-02 Tdk Corp Manufacturing method of optical recording medium
US7202292B2 (en) 2003-07-15 2007-04-10 General Electric Company Colored polymeric resin composition with 1,8-diaminoanthraquinone derivative, article made therefrom, and method for making the same
US7223520B2 (en) * 2003-02-03 2007-05-29 General Electric Company Limited play optical media device with barrier layers
US7419762B2 (en) * 2001-03-14 2008-09-02 General Electric Company Media and method for limiting access to data thereon

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7419762B2 (en) * 2001-03-14 2008-09-02 General Electric Company Media and method for limiting access to data thereon
US7223520B2 (en) * 2003-02-03 2007-05-29 General Electric Company Limited play optical media device with barrier layers
JP2004247015A (en) * 2003-02-17 2004-09-02 Tdk Corp Manufacturing method of optical recording medium
US7202292B2 (en) 2003-07-15 2007-04-10 General Electric Company Colored polymeric resin composition with 1,8-diaminoanthraquinone derivative, article made therefrom, and method for making the same

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