JPH05317797A - Rotary coating - Google Patents

Rotary coating

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Publication number
JPH05317797A
JPH05317797A JP12053392A JP12053392A JPH05317797A JP H05317797 A JPH05317797 A JP H05317797A JP 12053392 A JP12053392 A JP 12053392A JP 12053392 A JP12053392 A JP 12053392A JP H05317797 A JPH05317797 A JP H05317797A
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JP
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Patent type
Prior art keywords
disc
coating
agent
ultraviolet
optical
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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
JP12053392A
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Japanese (ja)
Inventor
Hideo Miyashita
Shiro Miyata
英生 宮下
志郎 宮田
Original Assignee
Dainippon Ink & Chem Inc
Nkk Corp
大日本インキ化学工業株式会社
日本鋼管株式会社
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
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Abstract

PURPOSE: To eliminate an inferior appearance entirely without any visible fine streaks on a film by applying a specified amount of ultraviolet beam-curable paint with the concurrent rotation of a disc-shaped substrate at low speed, then spinning off an extra coat by high-speed rotation of the substrate, and blasting a hot air to the uncured coat.
CONSTITUTION: A rotary coating device coats a disc-shaped substrate with an ultraviolet beam-curable paint using a spin-coating method. An optical disc 1 as a disc-shaped substrate is installed on a turntable 3 with the side where a recording film 2 is formed, turned facing upward. In addition, a fixed amount of a protective coating agent 4 as an ultraviolet curable paint is applied to protect the side where the recording film 2 is formed of the optical disc 1. Further, an extra protective coating agent 4 is spinned off the optical disc 1 by high-speed rotation of the turntable 3. After that, a hot air is blasted against the protecting coating agent 4 remaining uncured on the optical disc 1. Consequently, the leveling properties are improved by increasing the surface temperature, if the protective coating agent of ultraviolet beam-curable type used has inferior leveling properties. Thus, a ripple pattern generated can be erased instantaneously.
COPYRIGHT: (C)1993,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は円盤状基板に紫外線硬化型塗料をスピンコート法により塗布する回転塗布方法に関するものである。 The present invention relates to relates to a spin coating method of applying by spin coating a UV curable coating on the disk-shaped substrate.

【0002】 [0002]

【従来の技術】従来知られている円盤状基板の樹脂被膜方法は、例えば、光ディスクではグルーブと称される溝が形成されたポリカーボネート樹脂、ポリメチルメタクリルレート樹脂、エポキシ樹脂、アモルファスポリオレフィン樹脂等の円盤状のプラスチック基板に、グルーブが形成された側とは反対側の面にハードコート剤と称される紫外線硬化型塗料をスピンコート法により回転塗布してプラスチック基板全面に均一に行きわたらせた後、 BACKGROUND ART resin coating method of the disk-shaped substrates which are conventionally known, for example, a polycarbonate resin which grooves called grooves are formed in the optical disc, polymethyl methacrylate resins, epoxy resins, such as amorphous polyolefin resin a disk-shaped plastic substrate, after span go uniformly to the plastic substrate over the entire surface by spin coating by spin coating a hard coating agent called UV-curable coating material on a surface opposite to the side where the grooves are formed ,
紫外線を照射してハードコート膜を製膜する。 Ultraviolet light is irradiated with to film a hard coat film.

【0003】次に、真空蒸着法やスパッタ法等によりグルーブが形成された側に記録膜を製膜して光ディスクを作製する。 [0003] Then, to produce the optical disk to form a film of the recording film in the grooves are formed side by vacuum deposition or sputtering. この光ディスクの記録膜形成面側に保護コート剤と称される紫外線硬化型塗料をスピンコート法により回転塗布して光ディスク全面に保護膜を製膜していた。 It was to form a film of the protective film to the optical disk entire surface referred ultraviolet curable coating material and a protective coating agent on the recording film surface of the optical disk is rotated by spin coating.

【0004】また、コンパクトディスクでは予め所定の情報信号が刻印された円盤状のプラスチック基板に、情報信号が刻印されている側の面に真空蒸着法やスパッタ法により反射膜を製膜して、この反射膜形成面側に保護コート剤と称される紫外線硬化型塗料をスピンコート法により回転塗布してコンパクトディスク全面に保護膜を製膜していた。 Further, the disk-shaped plastic substrate in advance predetermined information signal is engraved in the compact disc, and film-forming the reflective film by vacuum deposition or sputtering on the surface on the side where the information signal is being engraved, the referred ultraviolet curable coating material and protective coating material to the reflective film forming surface is rotated by spin coating was film formation a protective film on a compact disc entirely.

【0005】このようにハードコート剤や保護コート剤等の紫外線硬化型塗料を円盤状基板にスピンコート法により回転塗布する場合には、低速回転時に一定速度で塗料を一定位置から一定量円盤状基板に塗布し、次に高速回転させて余分な紫外線硬化型塗料を振り切り、その後紫外線を照射して硬化させて均一な被膜を形成していた。 [0005] When the spin coating by spin coating in this manner an ultraviolet curable coating material such as a hard coating agent or a protective coating agent in the disk-shaped substrate is a certain amount discotic from a fixed position of paint at a constant speed during low-speed rotation applied to the substrate, then rotated at a high speed finishing off excess UV curable paint, was to form a uniform coating film was cured by subsequent irradiation with ultraviolet light.

【0006】 [0006]

【発明が解決しようとする課題】しかしながら、この方法では、高速回転させて余分な紫外線硬化型塗料を振り切った直後の樹脂表面には細かいさざ波状の筋が生じており、特にレベリング性が悪い紫外線硬化型塗料ではそのままの状態で紫外線を照射すると硬化後の被膜表面にもそのさざ波が残ってしまい、細かい筋として外観不良を生じる欠点を有していた。 [0007] However, in this method, high-speed rotation is allowed and caused fine ripple-like streaks on the resin surface immediately after shaking off excess UV curable coating composition, in particular UV leveling poor to coat the surface of the cured when irradiated with ultraviolet rays as is the curable coating will remain the ripples had the disadvantage of causing poor appearance as fine lines.

【0007】本発明が解決しようとする課題は、円盤状基板に紫外線硬化型塗料をスピンコート法により塗布する回転塗布方法において、回転塗布後の未硬化の塗膜の細かい筋の発生を無くし、得られた塗工物の外観不良を皆無として、スピンコート工程における収率を向上させることができる回転塗布方法を提供することにある。 An object of the present invention is to provide an ultraviolet curable coating on the disk-shaped substrate in the spin coating method of applying by spin coating, eliminates the occurrence of fine lines of the coating film uncured after spin coating, the poor appearance as none of the resulting coating material is to provide a spin coating method capable of improving the yield in the spin-coating process.

【0008】 [0008]

【課題を解決するための手段】本発明は上記課題を解決するために、円盤状基板を低速回転させながら一定量の紫外線硬化型塗料を円盤状基板に塗布する第1工程、円盤状基板を高速回転させて基板上の余分な塗料を振り切る第2工程及び円盤状基板上の未硬化の塗膜に熱風を吹き付ける第3工程を有することを特徴とする回転塗布方法を提供する。 Means for Solving the Problems The present invention to solve the above problems, a first step of applying a disk-shaped substrate a certain amount of the ultraviolet curable coating material while a low speed in a disk-shaped substrate, a disk-shaped substrate It is rotated at a high speed to provide a spin coating method characterized by having a third step of blowing hot air to the uncured coating film on the second step and the disk-shaped substrate shaken off the excess paint on a substrate.

【0009】 [0009]

【作用】本発明によれば、円盤状基板に紫外線硬化型塗料をスピンコート法により塗布する回転塗布装置において、一定量の塗料を塗布し、次に高速回転で円盤状基板を回転させて余分な塗料を振り切り、その後円盤状基板上の未硬化の塗膜に熱風を吹き付けるので、レベルング性が悪い紫外線硬化型塗料でも表面温度を上昇させることによりレベリング性を促進させることができるために、さざ波が即座に消滅し、従って、この塗膜に紫外線を照射して硬化させた得られた被膜には細かい筋が一切見られず、外観不良を皆無にすることができる。 According to the present invention, in a rotary coating apparatus for coating by spin coating an ultraviolet curable coating material on the disk-shaped substrate is coated with a predetermined amount of paint, the excess and then rotating the disk-shaped substrate in high-speed rotation finishing off a paint for subsequent since blowing hot air to the coating film uncured on disk-shaped substrate, which can promote the leveling property by increasing the surface temperature at the level ring is poor ultraviolet curable coating material, ripples disappear immediately, therefore, not seen fine streaks at all the film obtained by curing by irradiating ultraviolet rays to the coated film, it is possible to completely eliminate the appearance poor.

【0010】 [0010]

【実施例】以下、実施例及び比較例を用いて本発明を更に詳細に説明する。 EXAMPLES The following further illustrate the present invention with reference to Examples and Comparative Examples.

【0011】(実施例)図1に示したように円盤状基板である光ディスク1を記録膜2の形成面側を上にしてターンテーブル3に設置し、記録膜2の形成面側を保護するために保護コート剤「EX−318」(大日本インキ化学工業社製)4を塗布した。 [0011] (Example) The optical disc 1 is a disc-shaped substrate as shown in FIG. 1 in the top forming surface of the recording film 2 placed on the turntable 3, protects the forming surface of the recording film 2 protective coating agent "EX-318" was applied (manufactured by Dainippon Ink and Chemicals, Inc.) 4 in order.

【0012】この場合、ターンテーブル3を60rpm [0012] In this case, the turn table 3 60rpm
の低速回転で回転させると同時に、φ1.05mmの塗布用ノズル5を光ディスク1の中心より半径23mmの位置であって、光ディスクの面上1mmの位置に移動させた後、塗布用ノズルから1.4kgf/cm 2の圧力で2秒間保護コート剤4のを塗布した。 At the same time it is rotated at a low rotational speed, the coating nozzle 5 of φ1.05mm a position of radius 23mm from the center of the optical disk 1, after moving to the position of the surface on 1mm of the optical disk 1 from the coating nozzle. It was applied 4 to 2 seconds protective coating agent at a pressure of 4 kgf / cm 2. 次に、6,000rpmの高速回転で光ディスクを回転させて余分な保護コート剤を振り切った。 Next, shake off excess protective coating agent by rotating the optical disk at a high speed rotation of 6,000 rpm. この場合の塗膜の表面の状態は、図2に示したように細かいさざ波状の筋6が生じた状態であった。 State of the surface of the coating film in this case was a state where fine ripple-shaped muscle 6 as shown in FIG. 2 occurs.

【0013】その後、図3に示したように熱風として8 [0013] Then, as the hot air as shown in FIG. 3 8
0℃のクリーンエアー7を光ディスク1の表面上約10 0 ℃ ostensibly about 10 clean air 7 of the optical disc 1 of
cm離れた位置から2秒間吹き付けた後、紫外線8を照射して保護コート剤4を硬化させて保護コート膜を形成したが、保護コート膜表面には図4に示すように細かい筋は全く見られなかった。 After spraying for 2 seconds from cm distant position, but to form a protective coating layer by curing the protective coating agent 4 was irradiated with ultraviolet rays 8, quite fine lines as shown in FIG. 4 viewed in the protective coating film surface It is did not.

【0014】この熱風の温度は、光ディスクに熱変形を生じさせて機械特性を劣下させてしまう程の高い温度ではなく、レベリング性を促進し得る温度であれば良く、 [0014] The temperature of the hot air, rather than the high temperature of enough to be causing thermal deformation would not please poor mechanical properties to the optical disk may be a temperature capable of promoting the leveling property,
紫外線硬化型塗料の種類やレベリング性能によって適宜選択すれば良い。 It may be appropriately selected depending on the type and leveling performance of UV-curable coating material.

【0015】(比較例)図1に示したように、円盤状基板である光ディスク1を記録膜2の形成面側を上にしてターンテーブル3に設置し、次に記録膜2の形成面側を保護するために保護コート剤「EX−318」(大日本インキ化学工業社製)4を塗布した。 [0015] (Comparative Example) As shown in FIG. 1, the forming surface of the recording film 2 to the optical disk 1 is a disk-shaped substrate in the above was placed on the turn table 3, then forming surface of the recording film 2 4 was applied protective coating agent in order to protect the "EX-318" (manufactured by Dainippon Ink and Chemicals, Inc.).

【0016】この場合、ターンテーブル3を60rpm [0016] In this case, the turn table 3 60rpm
の低速回転で回転させると同時に、φ1.05mmの塗布用ノズル5を光ディスク1の中心より半径23mmの位置であって、光ディスクの面上1mmの位置に移動させた後、塗布用ノズルから1.4kgf/cm 2の圧力で2秒間保護コート剤4のを塗布した。 At the same time it is rotated at a low rotational speed, the coating nozzle 5 of φ1.05mm a position of radius 23mm from the center of the optical disk 1, after moving to the position of the surface on 1mm of the optical disk 1 from the coating nozzle. It was applied 4 to 2 seconds protective coating agent at a pressure of 4 kgf / cm 2. 次に、6,000rpmの高速回転で光ディスクを回転させて余分な保護コート剤を振り切った。 Next, shake off excess protective coating agent by rotating the optical disk at a high speed rotation of 6,000 rpm. この場合の塗膜の表面の状態は、図2に示したように細かいさざ波状の筋6が生じた状態であった。 State of the surface of the coating film in this case was a state where fine ripple-shaped muscle 6 as shown in FIG. 2 occurs.

【0017】その後、図5に示したように、直ちに紫外線8を照射して保護コート剤4を硬化させて保護コート膜を形成したが、保護コート膜には図2に示したのと同様に細かい筋6が被膜全面に見られた。 [0017] Thereafter, as shown in FIG. 5, immediately, to form a protective coating layer by curing the protective coating agent 4 was irradiated with ultraviolet rays 8, similar to the protective coating layer shown in FIG. 2 fine lines 6 were observed in the coating over the entire surface.

【0018】 [0018]

【発明の効果】本発明の回転塗布方法では、一定量の紫外線硬化型塗料を塗布し、次に高速回転で円盤状基板を回転させて余分な紫外線硬化型塗料を振り切り、その後円盤状基板上の未硬化の塗膜に熱風を吹き付けるので、 In the spin coating method of the present invention, applying a predetermined amount of the ultraviolet curable coating material, then rotate the disk-shaped substrate at a high speed rotation shake off excess UV curable coating, then disc-shaped substrate since blowing hot air to the coating film of the uncured,
レベルング性が悪い紫外線硬化型塗料でも表面温度を上昇させることによりレベリング性を促進させることができるためにさざ波が即座に消滅し、従って未硬化の塗膜に紫外線を照射して硬化させて得られた被膜には細かい筋は一切見られず、外観不良を皆無にすることができる。 Instantly disappears ripples to the leveling properties can be accelerated by level packaging property raises the surface temperature in poor ultraviolet curable coating material, hence it is cured by irradiating ultraviolet rays to the coating film uncured obtained was fine muscle is not seen at all in the film, it is possible to completely eliminate the poor appearance.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】スピンコート法により円盤状基板に紫外線硬化型塗料を塗布する場合の概念的な図で、光ディスクをターンテーブル上に設置したときの側面図である。 [1] In the conceptual diagram in the case of applying a UV curable coating on the disk-shaped substrate by a spin coating method, a side view of the installed optical disc on the turntable.

【図2】紫外線硬化型塗料を塗布した後、高速回転で余分な樹脂を振り切った時の未硬化の塗膜表面の状態を示す平面図である。 [2] After the coated ultraviolet-curable coating is a plan view showing a state of the uncured coating film surface when the shake off excess resin at high speed.

【図3】実施例に記載の方法により光ディスクに保護コート剤を塗布する場合の概念図である。 3 is a conceptual diagram in the case of applying a protective coating agent on the optical disk by the method described in Examples.

【図4】スピンコート法により円盤状基板に塗料を塗布する場合の概念的な図で、実施例2及び比較例2に記載したハードコート剤を塗布する場合の光ディスクをターンテーブルに設置したときの側面図である。 [4] In the conceptual diagram in the case of applying a coating to the disk-shaped substrate by a spin coating method, when installed optical disc when applying the hard coat agent as described in Example 2 and Comparative Example 2 on the turntable it is a side view of.

【図5】比較例に記載の方法により光ディスクに保護コート剤を塗布する場合の概念図である。 5 is a conceptual diagram in the case of applying a protective on the optical disk coating agent according to the method described in Comparative Example.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 光ディスク 2 記録膜 3 ターンテーブル 4 保護コート剤 5 塗料塗布用ノズル 6 細かいさざ波状の筋 7 熱風 8 紫外線 1 optical disk 2 recording film 3 turntable 4 protective coating agent 5 fine paint coating nozzle 6 ripple-shaped muscle 7 hot 8 UV

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 円盤状基板を低速回転させながら一定量の紫外線硬化型塗料を円盤状基板に塗布する第1工程、 1. A first step of a quantity of the ultraviolet curable coating while the disk-shaped substrate by low speed is applied to the disk-shaped substrate,
    円盤状基板を高速回転させて基板上の余分な塗料を振り切る第2工程及び円盤状基板上の未硬化の塗膜に熱風を吹き付ける第3工程を有することを特徴とする回転塗布方法。 Spin coating method, wherein a disk-shaped substrate is rotated at a high speed with a third step of blowing hot air to the second step and uncured coating film on the disk-shaped substrate shaken off the excess paint on a substrate.
JP12053392A 1992-05-13 1992-05-13 Rotary coating Pending JPH05317797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12053392A JPH05317797A (en) 1992-05-13 1992-05-13 Rotary coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12053392A JPH05317797A (en) 1992-05-13 1992-05-13 Rotary coating

Publications (1)

Publication Number Publication Date
JPH05317797A true true JPH05317797A (en) 1993-12-03

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ID=14788643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12053392A Pending JPH05317797A (en) 1992-05-13 1992-05-13 Rotary coating

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009514671A (en) * 2005-11-08 2009-04-09 ジングルス・テヒノロギース・アクチェンゲゼルシャフトSingulus Technologies Ag Method and apparatus for controlling the film thickness by spin coating
US8293330B2 (en) 2005-12-22 2012-10-23 Hoya Corporation Lens coating apparatus and lens coating method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009514671A (en) * 2005-11-08 2009-04-09 ジングルス・テヒノロギース・アクチェンゲゼルシャフトSingulus Technologies Ag Method and apparatus for controlling the film thickness by spin coating
US8293330B2 (en) 2005-12-22 2012-10-23 Hoya Corporation Lens coating apparatus and lens coating method

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