JP2000040271A - Production optical recording medium - Google Patents
Production optical recording mediumInfo
- Publication number
- JP2000040271A JP2000040271A JP10251217A JP25121798A JP2000040271A JP 2000040271 A JP2000040271 A JP 2000040271A JP 10251217 A JP10251217 A JP 10251217A JP 25121798 A JP25121798 A JP 25121798A JP 2000040271 A JP2000040271 A JP 2000040271A
- Authority
- JP
- Japan
- Prior art keywords
- optical recording
- adhesive
- recording medium
- substrates
- manufacturing
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
- B29C66/452—Joining of substantially the whole surface of the articles the article having a disc form, e.g. making CDs or DVDs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/485—Multi-component adhesives, i.e. chemically curing as a result of the mixing of said multi-components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2017/00—Carriers for sound or information
- B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
- B29L2017/003—Records or discs
- B29L2017/005—CD''s, DVD''s
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光記録層を有する
２枚の基板を貼り合わせてなる光記録媒体の製造方法に
関するものであり、特に、２液型接着剤により基板を貼
り合わせてなる光記録媒体の製造方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an optical recording medium by bonding two substrates having an optical recording layer, and more particularly to a method for bonding substrates using a two-component adhesive. The present invention relates to a method for manufacturing an optical recording medium.
【０００２】[0002]
【従来の技術】従来より、両面記録型光記録媒体の貼り
合わせ構造として、２枚の光記録媒体単板の記録面どう
しを接着層を介して貼り合わせる、いわゆる密着貼り合
わせ構造が知られている。近年、光記録媒体の大容量化
が要求されてきており、光記録媒体基板の薄型化にとも
なう強度保持のため、透明基板を貼り合わせるタイプを
含め、２枚以上の貼り合わせタイプが主流となりつつあ
る。これら貼り合わせ方法としては紫外線硬化型接着
剤、２液混合型接着剤を用いる方法がある。2. Description of the Related Art Conventionally, a so-called close-adhesion structure, in which the recording surfaces of two optical recording medium single plates are adhered to each other via an adhesive layer, has been known as a structure for bonding a double-sided recording type optical recording medium. I have. In recent years, large-capacity optical recording media have been demanded, and in order to maintain strength accompanying the reduction in thickness of optical recording medium substrates, two or more bonded types including a type in which a transparent substrate is bonded are becoming mainstream. is there. As such a bonding method, there is a method using an ultraviolet curable adhesive or a two-component mixed adhesive.
【０００３】２液混合型接着剤の接着方法としては、自
動混合吐出機を使用して２液を直前に混合して一方の基
板に塗布し、もう一方の基板を重ね合わせるタイプや、
貼り合わせる基板の一方に第１の液を、もう一方に第２
の液を塗布して重ね合わせるタイプがある。[0003] As a bonding method of a two-component mixed type adhesive, two types of liquids are mixed immediately before using an automatic mixing and discharging machine and applied to one substrate, and the other substrate is superposed.
The first liquid is applied to one of the substrates to be bonded and the second liquid is applied to the other of the substrates.
There is a type of applying and superposing the liquid.
【０００４】[0004]
【発明が解決しようとする課題】紫外線硬化型接着剤を
用いて貼り合わせる方法は、光記録媒体基板の薄厚化に
ともなう強度保持のために透明基板を貼り合わせるタイ
プや半透明膜を形成した基板を貼り合わせるタイプには
有効である。しかし、２枚以上の光記録媒体基板を貼り
合わせる用途で、基板に形成された記録膜が紫外線など
の硬化光をほとんど透過しない場合には光記録媒体基板
の全面を接着することができない。The method of bonding using an ultraviolet curable adhesive is of a type in which a transparent substrate is bonded to maintain the strength of an optical recording medium substrate as the thickness is reduced, or a substrate having a semi-transparent film formed thereon. This is effective for the type of pasting. However, when two or more optical recording medium substrates are bonded together and the recording film formed on the substrate hardly transmits curing light such as ultraviolet light, the entire surface of the optical recording medium substrate cannot be bonded.
【０００５】そのため広範囲の温度領域において信頼性
が高く、紫外線等の硬化光が透過しない部分の貼り合わ
せが短時間で可能な方法として、２液型接着剤を使用す
る方法が特開平２−２２３０３１号公報、特開平７−３
７２７４号公報等として提案されている。しかしなが
ら、２液混合後の室温近辺でのポットライフが短いた
め、自動混合吐出機を使用した際には、混合部より先の
部分につまりを引き起こしやすいという欠点がある。さ
らに、２液を混合してから塗布する方法では硬化までの
時間が短く、混合後の粘度上昇のため基板間に均一に液
を展延することが困難であり、接着剤層の厚みムラが生
じやすかった。また、２液を別の基板に展開してから重
ね合わせ、２液を接触して硬化させる方法では、均一
に、かつ気泡が混入しないように貼り合わせるのが困難
であるという問題があった。また、２液を独立にビード
状に吐出した後、基板を重ね合わせて展延する方法で
は、気泡は混入しにくく、さらに接着剤層の厚みムラも
生じにくいが、２液の混合が不十分な箇所が発生しやす
いという問題が生じる。For this reason, a method using a two-component adhesive is disclosed in Japanese Patent Application Laid-Open No. H2-223031 as a method for bonding a portion which is highly reliable in a wide temperature range and does not transmit curing light such as ultraviolet rays in a short time. JP, JP-A-7-3
No. 7274 has been proposed. However, since the pot life near room temperature after mixing two liquids is short, when an automatic mixing and discharging machine is used, there is a drawback that clogging is likely to occur in a portion ahead of the mixing section. Further, in the method of applying the mixture after mixing the two liquids, the time until curing is short, and it is difficult to spread the liquid uniformly between the substrates due to an increase in viscosity after the mixing, and the thickness unevenness of the adhesive layer is reduced. It was easy to happen. In addition, the method of developing two liquids on another substrate and then superimposing the two liquids and curing them by contacting the two liquids has a problem that it is difficult to bond them uniformly and without bubbles. In the method in which the two liquids are independently discharged in a bead shape and then the substrates are superposed and spread, bubbles are less likely to be mixed and uneven thickness of the adhesive layer is less likely to occur, but the mixing of the two liquids is insufficient. There is a problem that a troublesome part is likely to occur.
【０００６】本発明はかかる課題を解決するためになさ
れたものであって、その目的は、信頼性および耐久性に
優れた貼り合わせ構造の光記録媒体を提供すること、お
よびそのような光記録媒体を２液型接着剤を用いて低コ
ストで製造する方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an optical recording medium having a laminated structure excellent in reliability and durability, and to provide such an optical recording medium. An object of the present invention is to provide a method for manufacturing a medium at low cost using a two-part adhesive.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記の課題を
解決するために以下の構成からなる。すなわち、本発明
の光記録媒体の製造方法は、対向する２枚の基板の少な
くとも一方の対向面上に記録層が設けてあり、両対向面
が接着剤で貼り合わされてなる光記録媒体の製造方法で
あって、該接着剤として２液型接着剤を用い、かつ２液
型接着剤の各々の液を独立して基板に塗布し、２枚の基
板を該２液型接着剤を挟んで重ね合わせた後、独立に塗
布された２液型接着剤の各々の液を混合させ、該混合し
た２液型接着剤を基板間に広げ、接着剤を硬化すること
を特徴とするものである。The present invention has the following arrangement to solve the above-mentioned problems. That is, the method for manufacturing an optical recording medium according to the present invention is directed to a method for manufacturing an optical recording medium in which a recording layer is provided on at least one opposing surface of two opposing substrates and both opposing surfaces are bonded with an adhesive. A two-component adhesive, wherein each of the two-component adhesives is independently applied to a substrate, and the two substrates are sandwiched between the two-component adhesives. After overlapping, each liquid of the independently applied two-component adhesive is mixed, the mixed two-component adhesive is spread between the substrates, and the adhesive is cured. .
【０００８】この場合、２液型接着剤を基板の中心穴を
中心とした同心円状に、かつ該基板垂直方向に層状に供
給することが好ましい。In this case, it is preferable to supply the two-component adhesive concentrically around the center hole of the substrate and in a layered manner in the direction perpendicular to the substrate.
【０００９】さらに、２液型接着剤を貼り合わせる一方
の基板に吐出し、もう一方の基板を重ね合わせることが
好ましい。Further, it is preferable that the two-component adhesive is discharged onto one of the substrates to be bonded, and the other substrate is overlaid.
【００１０】あるいは、光記録媒体を構成する２枚の基
板を対向配置させ、該２枚の基板間に２液型接着剤を注
入することが好ましい。[0010] Alternatively, it is preferable that two substrates constituting the optical recording medium are arranged to face each other, and a two-component adhesive is injected between the two substrates.
【００１１】該独立に塗布された２液型接着剤を混合さ
せる工程としては、２枚の基板を重ね合わせた後、該２
液型接着剤を挟んで、該２枚の基板を中心穴を中心とし
て相対回転させることが好ましい。In the step of mixing the independently applied two-part adhesive, the two substrates are overlapped with each other,
It is preferable that the two substrates be relatively rotated about the center hole with the liquid adhesive therebetween.
【００１２】[0012]
【発明の実施の形態】光記録媒体の製造方法について
は、２枚の光記録単板を作製した後、いずれか一方の光
記録単板の記録膜面に２液型接着剤を独立して同心円状
に、かつ単板に対し垂直方向に塗布する。次いで２液型
接着剤を挟み込むようにして他方の光記録単板を重ね合
わせ、２液型接着剤を挟んで２枚の単板を中心穴を中心
として相対回転させる。次いで、２液型接着剤を重ね合
わせた２枚の光記録単板間に広げ、１００℃以下の低温
で加熱し、２液の反応を促進し硬化させる方法を用いる
ことができる。BEST MODE FOR CARRYING OUT THE INVENTION With respect to a method for manufacturing an optical recording medium, after two optical recording veneers are produced, a two-component adhesive is applied to the recording film surface of one of the optical recording veneers independently. It is applied concentrically and perpendicular to the veneer. Next, the other optical recording veneers are overlapped so as to sandwich the two-component adhesive, and the two veneers are relatively rotated about the center hole with the two-component adhesive therebetween. Next, a method can be used in which the two-component adhesive is spread between two superposed optical recording plates, heated at a low temperature of 100 ° C. or lower to accelerate the two-component reaction and cure.
【００１３】この場合、接着剤を２枚の光記録単板間に
広げる方法としては、２枚の光記録単板を一体的に高速
回転させる方法、または圧着プレスする方法を用いるこ
とができる。In this case, as a method of spreading the adhesive between the two optical recording veneers, a method of integrally rotating the two optical recording veneers at a high speed, or a method of pressing under pressure can be used.
【００１４】あるいは、接着剤を塗布する方法として、
２枚の光記録単板を対向配置させて、その間隙に２液型
接着剤を注入する方法を用いることができるが、これら
に限られるものではない。Alternatively, as a method of applying an adhesive,
A method in which two optical recording veneers are arranged to face each other and a two-component adhesive is injected into a gap therebetween can be used, but the method is not limited thereto.
【００１５】接着剤を基板の中心穴を中心とした同心円
状に、かつ基板垂直方向に層状に供給すると、展延させ
る際に接着剤の２液を均一に展延させることができ、接
着剤の硬化不良や硬化後の基板厚みムラを防ぐことがで
きる。When the adhesive is supplied concentrically around the center hole of the substrate and in a layered manner in the vertical direction of the substrate, the two liquids of the adhesive can be spread evenly at the time of spreading. And curing unevenness of the substrate after curing can be prevented.
【００１６】２枚の基板を重ね合わせた後に、塗布され
た２液型接着剤を挟んで相対回転させると、独立に吐出
された２液型接着剤が基板間で混合・拡散されるため、
２液の塗布量比がアンバランスになりやすい塗布開始位
置等で混合ムラに起因する硬化不良を防止できる。相対
回転角は１８０度以上が好ましく、より好ましくは３６
０度以上である。When the two substrates are superposed and then rotated relative to each other with the applied two-component adhesive therebetween, the two-component adhesive discharged independently is mixed and diffused between the substrates.
It is possible to prevent poor curing caused by uneven mixing at the application start position or the like where the application amount ratio of the two liquids tends to be unbalanced. The relative rotation angle is preferably 180 degrees or more, more preferably 36 degrees.
0 degrees or more.
【００１７】２液型接着剤を挟み込むようにして前記２
枚の基板を重ね合わせ、高速で回転させて貼り合わせる
方法を用いると、高速回転される２つの基板の各情報媒
体層の間で、遠心力の作用によって樹脂がほぼ均一に介
在するように拡散するとともに、基板間に内包されてい
た気泡もはじき出されるので、反り等の少ない形状精度
の高い光記録媒体が得られる。The two-component adhesive is sandwiched between the two components.
When a method is used in which two substrates are superimposed, rotated at a high speed, and bonded to each other, the resin is diffused almost uniformly between the information medium layers of the two substrates rotated at a high speed by the action of centrifugal force. At the same time, the air bubbles contained between the substrates are repelled, so that an optical recording medium with less warpage and high shape accuracy can be obtained.
【００１８】２液型接着剤を基板に吐出後、２枚の基板
を減圧下で重ね合わせることにより気泡の混入なく接着
剤を基板間に広げることができる。この場合高速回転に
より基板間に内包されていた気泡を振りとばす必要がな
いため、接着剤の使用効率を高めることができるという
利点がある。減圧度は３×１０3 Ｐａ以下、より好まし
くは０．７×１０3 Ｐａ以下が適当であり、これ以上で
は気泡が混入することもある。After the two-component adhesive is discharged onto the substrates, the two substrates are superposed under reduced pressure so that the adhesive can be spread between the substrates without air bubbles. In this case, there is no need to dislodge bubbles contained between the substrates by high-speed rotation, and thus there is an advantage that the use efficiency of the adhesive can be increased. The degree of pressure reduction is preferably 3 × 10 3 Pa or less, more preferably 0.7 × 10 3 Pa or less, and if it is higher than this, bubbles may be mixed in.
【００１９】２液型接着剤を一方の基板に吐出し、もう
一方の基板を重ね合わせる方法を用いる場合、気泡を混
入しないように重ね合わせる、あるいは２枚の基板を対
向配置させて、その間隙に２液型接着剤を注入する方法
を用いる場合、ノズル吐出直後の接着剤が、上下２枚の
基板に同時に接するように、かつ気泡が基板間に混入し
ないように注入すると、基板を重ね合わせ後に余分な接
着剤や気泡を振りとばすことなく、気泡を含まない貼り
合わせ媒体を得ることができる。この方法を用いると、
貼り合わせに必要な量のみの接着剤の使用で貼り合わせ
が可能であるため、接着剤の利用効率を高めることがで
きる。When the two-component adhesive is discharged onto one substrate and the other substrate is superimposed, the two substrates are superposed so that air bubbles are not mixed in. When using a method of injecting a two-component adhesive into the substrate, the adhesive immediately after the nozzle discharge is injected so that the adhesive is in contact with the upper and lower substrates simultaneously and air bubbles are not mixed between the substrates. It is possible to obtain a bonding medium containing no air bubbles without dislodging excess adhesive or air bubbles later. With this method,
Since the bonding can be performed by using only the adhesive necessary for the bonding, the use efficiency of the adhesive can be improved.
【００２０】塗布された接着剤は基板の自重により２枚
の基板間に広げることも可能であるが、タクトの短縮を
図り、２液型接着剤の可使時間内に単板間に広げるため
には一体的に回転させたり、圧着プレスすることが好ま
しい。気泡の混入がなく重ね合わせた基板を一体的に回
転させて接着剤を広げる場合、接着剤が基板の外周端ま
で広がるところで回転を停止させるように回転速度およ
び回転時間を制御することによって必要量の接着剤のみ
で貼り合わせが可能であるため、接着剤の利用効率を高
めることができる。The applied adhesive can be spread between the two substrates by the weight of the substrate. However, in order to shorten the tact time and spread between the single plates within the usable time of the two-component adhesive, It is preferable to rotate integrally or press by pressure. When the adhesive is spread by rotating the superposed substrates together without air bubbles, the required amount is controlled by controlling the rotation speed and rotation time so that the adhesive stops at the point where the adhesive spreads to the outer peripheral edge of the substrate. Can be bonded using only the adhesive, and thus the use efficiency of the adhesive can be improved.
【００２１】２枚の基板を重ね合わせ、２液を接触させ
た後は、そのまま室温で硬化させても良いが、加熱処理
をすることによって接着剤の硬化速度を速めることがで
きる。接着剤の硬化前に１００℃以上の高温に加熱する
ことは、記録層や基板に熱的な悪影響を与える可能性が
あるため好ましくない。加熱温度は１００℃以下、好ま
しくは８０℃以下、より好ましくは６０℃以下である。After the two substrates are overlaid and the two liquids are brought into contact with each other, it may be cured at room temperature as it is. However, the curing rate of the adhesive can be increased by performing a heat treatment. Heating to a high temperature of 100 ° C. or more before curing of the adhesive is not preferable because it may adversely affect the recording layer and the substrate. The heating temperature is 100 ° C. or lower, preferably 80 ° C. or lower, more preferably 60 ° C. or lower.
【００２２】２液型接着剤としては重合可能なエチレン
性二重結合を分子内に少なくとも１つ以上有するモノマ
ーをベースとする、低温で硬化するものであれば何でも
用いることができるが、特にアクリル樹脂は硬化速度が
速いために好適に用いることができる。また、２液型ア
クリル樹脂は、ホットメルト型接着剤に比べて吸水率が
格段に小さいので、記録膜または反射膜等の腐食を防止
する効果が高く、長期保存性に優れた光記録媒体を作製
することができる。さらに、オーバーコートが省略で
き、工程の簡素化、低コスト化が可能である。２液型ア
クリル樹脂は２液の混合比に十分な余裕があるので混合
比管理が簡単であり容易な作業で確実な接着状態が得ら
れる。また高温時の接着強度が高いので、剥離を生じに
くく、信頼性および耐久性に優れた光記録媒体を作製す
ることができる。As the two-part adhesive, any adhesive which can be used at a low temperature and is based on a monomer having at least one polymerizable ethylenic double bond in the molecule can be used. Resins can be suitably used because of their high curing speed. In addition, since the two-component acrylic resin has a significantly lower water absorption than a hot-melt adhesive, it has a high effect of preventing corrosion of a recording film or a reflection film and has an excellent long-term storage property. Can be made. Further, the overcoat can be omitted, and the process can be simplified and the cost can be reduced. Since the two-component acrylic resin has a sufficient margin for the mixing ratio of the two components, the mixing ratio control is simple, and a reliable bonding state can be obtained by an easy operation. In addition, since the adhesive strength at high temperature is high, peeling does not easily occur, and an optical recording medium excellent in reliability and durability can be manufactured.
【００２３】２液型アクリル樹脂に用いる重合性モノマ
ーとしては、２官能や３官能や４官能や６官能の（メ
タ）アクリル酸エステルなどが挙げられる。具体的には
２官能の（メタ）アクリル酸エステルとしてはトリプロ
ピレングリコールジ（メタ）アクリレート、１，６−ヘ
キサンジオールジアクリレート、テトラエチレングリコ
ールジ（メタ）アクリレート等がある。３官能の（メ
タ）アクリル酸エステルとしてはトリメチロールプロパ
ントリ（メタ）アクリレート、ペンタエリスリトールト
リ（メタ）アクリレート等がある。４官能の（メタ）ア
クリル酸エステルとしてはテトラメチロールメタンテト
ラ（メタ）アクリレート、ペンタエリスリトールテトラ
（メタ）アクリレート等がある。６官能の（メタ）アク
リル酸エステルとしてはジペンタエリスリトールヘキサ
アクリレート等がある。Examples of the polymerizable monomer used for the two-pack type acrylic resin include difunctional, trifunctional, tetrafunctional, and hexafunctional (meth) acrylates. Specifically, examples of the bifunctional (meth) acrylate include tripropylene glycol di (meth) acrylate, 1,6-hexanediol diacrylate, and tetraethylene glycol di (meth) acrylate. Examples of the trifunctional (meth) acrylate include trimethylolpropane tri (meth) acrylate and pentaerythritol tri (meth) acrylate. Examples of the tetrafunctional (meth) acrylate include tetramethylolmethanetetra (meth) acrylate and pentaerythritoltetra (meth) acrylate. Hexafunctional (meth) acrylates include dipentaerythritol hexaacrylate.
【００２４】また、２液型アクリル樹脂に用いる架橋性
オリゴマーとしては、ポリエステル（メタ）アクリレー
ト、ポリエーテル（メタ）アクリレート、ポリウレタン
（メタ）アクリレート、エポキシ（メタ）アクリレー
ト、シリコン（メタ）アクリレート等が挙げられる。具
体的にはポリエチレングリコールジ（メタ）アクリレー
ト、ポリプロピレンクリコールジ（メタ）アクリレー
ト、ビスフェノールＡ型エポキシアクリレート、ポリウ
レタンのジアクリレート、クレゾールノボラック型エポ
キシ（メタ）アクリレート等がある。As the crosslinkable oligomer used for the two-pack type acrylic resin, polyester (meth) acrylate, polyether (meth) acrylate, polyurethane (meth) acrylate, epoxy (meth) acrylate, silicon (meth) acrylate, and the like can be used. No. Specific examples include polyethylene glycol di (meth) acrylate, polypropylene crycol di (meth) acrylate, bisphenol A type epoxy acrylate, polyurethane diacrylate, and cresol novolak type epoxy (meth) acrylate.
【００２５】２液型アクリル樹脂の組成として特に好ま
しくはウレタンアクリレートおよび／またはエポキシア
クリレート２０〜８０重量％、単官能および／または多
官能アクリレート８０〜２０重量％の混合系が挙げられ
る。２液の樹脂成分が同一の組成であると、硬化状態が
均一になるのでクラックが生じないという利点がある。The composition of the two-pack type acrylic resin is particularly preferably a mixed system of 20 to 80% by weight of urethane acrylate and / or epoxy acrylate and 80 to 20% by weight of monofunctional and / or polyfunctional acrylate. If the two liquid resin components have the same composition, there is an advantage that cracks do not occur because the cured state becomes uniform.
【００２６】２液型接着剤は一般に、一方の液に硬化触
媒を、他方の液に重合促進剤を含んだものが用いられ
る。硬化触媒としては、主に過酸化物が用いられ、例え
ば、ベンゾイルパーオキサイド、ｏ−クロロベンゾイル
パーオキサイド、イソブチリルパーオキサイド等のアシ
ルパーオキサイド類、ジイソプロピルベンゼンパーオキ
サイド、クメンハイドロパーオキサイド、ｔ−ブチルハ
イドロパーオキサイド、パラメンタンハイドロパーオキ
サイド等のハイドロパーオキサイド類、メチルエチルケ
トンパーオキサイド、メチルイソブチルケトンパーオキ
サイド、アセチルアセトンパーオキサイド、メチルシク
ロヘキサノンパーオキサイド、シクロヘキサノンパーオ
キサイド等のケトンパーオキサイド類等が挙げられる。
重合促進剤は、無機又は有機金属塩や３級アミンが主と
して用いられ、例えばオクチル酸、ナフテン酸の銅、
鉄、錫、コバルトの金属塩、アセチルアセトンバナジウ
ム、銅、鉄、亜鉛、チタン、アルミニウム、マンガン等
の遷移金属の炭酸塩、硫酸塩、塩酸塩、硝酸塩、塩基性
炭酸塩、塩基性硫酸塩、塩基性塩酸塩、塩基性硝酸塩、
ジメチルアニリン、ジメチルパラトルイジン、エチレン
チオ尿素等が挙げられる。In general, a two-part adhesive is used in which one part contains a curing catalyst and the other part contains a polymerization accelerator. As the curing catalyst, peroxides are mainly used. For example, benzoyl peroxide, o-chlorobenzoyl peroxide, acyl peroxides such as isobutyryl peroxide, diisopropylbenzene peroxide, cumene hydroperoxide, t- Examples thereof include hydroperoxides such as butyl hydroperoxide and paramenthane hydroperoxide, and ketone peroxides such as methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide, acetylacetone peroxide, methylcyclohexanone peroxide, and cyclohexanone peroxide.
As the polymerization accelerator, an inorganic or organic metal salt or a tertiary amine is mainly used, for example, octylic acid, copper of naphthenic acid,
Iron, tin, cobalt metal salts, transition metal carbonates such as vanadium acetylacetone, copper, iron, zinc, titanium, aluminum, and manganese, sulfates, hydrochlorides, nitrates, basic carbonates, basic sulfates, bases Hydrochloride, basic nitrate,
Dimethylaniline, dimethylparatoluidine, ethylenethiourea and the like can be mentioned.
【００２７】さらに本発明に用いる２液型接着剤に光重
合開始剤を添加することも有効である。光硬化性を付与
することにより、２液型接着剤の硬化反応が進行する前
に、硬化光を透光部に照射して、２枚の光記録単板を仮
固定することが可能となる。光重合開始剤としては、例
えば、アセトフェノン、ベンゾフェノン、ｐ−ジメチル
アミノプロピオフェノンなどのケトン系化合物、ベンゾ
イン、ベンゾインメチルエーテル、ベンゾインエチルエ
ーテル、ベンゾインイソプロピルエーテルなどのベンゾ
イン系化合物、テトラメチルチウラムモノスルフィド、
テトラメチルチウラムジスルフィドなどのスルフィド化
合物、チオキサン、２−メチルチオキサンなどのチオキ
サン系化合物などを好適に用いることができる。It is also effective to add a photopolymerization initiator to the two-component adhesive used in the present invention. By imparting photocurability, it becomes possible to irradiate curing light to the translucent portion before the curing reaction of the two-component adhesive proceeds, thereby temporarily fixing the two optical recording veneers. . Examples of the photopolymerization initiator include ketone compounds such as acetophenone, benzophenone and p-dimethylaminopropiophenone, benzoin compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether and benzoin isopropyl ether, and tetramethylthiuram monosulfide. ,
Sulfide compounds such as tetramethylthiuram disulfide, thioxane compounds such as thioxane and 2-methylthioxane, and the like can be preferably used.
【００２８】本発明においては、２液の混合あるいは接
触により重合反応が開始する２液型接着剤を使用するの
で、貼り合わせは基板の片方は記録層のない透明媒体で
あっても、また、どちらも光を全く透過しない基板でも
よい。また、２液型接着剤を用いることにより、貼り合
わせ後は短時間で反応が進行するので、２枚の基板にズ
レが生じたり、再剥離等は起こらず良好な貼り合わせ光
記録媒体が得られる。In the present invention, a two-component adhesive which initiates a polymerization reaction by mixing or contacting two components is used, so that the bonding can be performed even if one of the substrates is a transparent medium having no recording layer. Both may be substrates that do not transmit light at all. In addition, by using a two-component adhesive, the reaction proceeds in a short time after bonding, so that a good bonded optical recording medium can be obtained without displacement or re-peeling of the two substrates. Can be
【００２９】本発明は再生専用（ＲＯＭ）光記録媒体、
光磁気記録媒体や相変化光記録媒体などの書換型（ＲＡ
Ｍ）光記録媒体、部分再生専用型（ＰＲＯＭ）光記録媒
体、追記型（ＷＯＲＭ）光記録媒体などのいずれの光記
録媒体を製造する場合にも用いることができる。The present invention relates to a read-only (ROM) optical recording medium,
Rewritable (RA) media such as magneto-optical recording media and phase-change optical recording media
M) It can be used for manufacturing any optical recording medium such as an optical recording medium, a partial read-only (PROM) optical recording medium, and a write-once (WORM) optical recording medium.
【００３０】[0030]
【実施例】以下、実施例により本発明をさらに説明す
る。ただし、本発明は以下の実施例により限定されるも
のではない。The present invention will be further described with reference to the following examples. However, the present invention is not limited by the following examples.
【００３１】実施例１ 直径１２０ｍｍ、厚さ０．６ｍｍの基板にスパッタ法に
より外周部と内周部を除く全面に記録層を成膜した光記
録媒体２枚を用いた。２液型接着剤の第１の液（Ａ液）
を第１のディスクの記録層形成面にスピンコートした。
第１のディスクのＡ液塗布面に第２の液（Ｂ液）を同心
円状に滴下し、その上から第２のディスクを記録層形成
面を内側にして自然落下し、同心に重ね合わせた。接着
剤が完全に広がらないうちに、第１のディスクを固定さ
せた状態で、第２のディスクを中心穴を中心として１回
転させた。この２枚のディスクを一体にスピンナーで高
速回転させて接着剤をディスク間に均一に展延させた。
重ね合わせ後６０℃オーブンで１０分加熱処理を行った
ところ接着剤は全面にわたって硬化し、気泡の混入のな
い良好な貼り合わせ光記録媒体が得られた。また、貼り
合わせ後のチルト、軸方向加速度は５mrad、５ｍ／ｓ2
となり、ともに目標値（６mrad、７ｍ／ｓ2）をクリア
した。この貼り合わせ記録媒体を９０℃、８０％Ｒ．
Ｈ．で環境試験を１０００時間行ったところ外観上の変
化はなく、記録膜の腐蝕はみられなかった。Example 1 Two optical recording media were used in which a recording layer was formed on the entire surface excluding the outer and inner peripheral portions by sputtering on a substrate having a diameter of 120 mm and a thickness of 0.6 mm. First liquid of two-part adhesive (A liquid)
Was spin-coated on the recording layer forming surface of the first disk.
The second liquid (liquid B) was dropped concentrically onto the liquid A applied surface of the first disk, and the second disk was naturally dropped from above with the recording layer forming surface inside, and was concentrically superimposed. . Before the adhesive was completely spread, the second disk was rotated once around the center hole while the first disk was fixed. The two disks were integrally rotated at a high speed with a spinner to spread the adhesive uniformly between the disks.
When heat treatment was performed in a 60 ° C. oven for 10 minutes after the superposition, the adhesive was cured over the entire surface, and a good bonded optical recording medium free of air bubbles was obtained. The tilt and axial acceleration after bonding are 5 mrad and 5 m / s 2.
And both cleared the target values (6 mrad, 7 m / s 2 ). This bonded recording medium was heated at 90 ° C. and 80% R.F.
H. When an environmental test was conducted for 1,000 hours, there was no change in appearance, and no corrosion of the recording film was observed.
【００３２】実施例２ 直径１２０ｍｍ、厚さ０．６ｍｍの基板にスパッタ法に
より外周部と内周部を除く全面に記録層を成膜した光記
録媒体２枚を用いた。第１のディスクを回転テーブルに
真空吸着させ、その真上に距離２ｍｍを保つように、第
２のディスクを平行に配置した。２枚のディスク間に紫
外線硬化型２液型接着剤の各液の吐出ノズルを挿入し、
２枚のディスクを同時に回転速度１２ｒｐｍで回転させ
ながら、吐出ノズルから２液を層状に、かつ気泡がディ
スク間に混入しないように５秒間吐出した。接着剤が完
全に広がらないうちに、第１のディスクを固定させた状
態で、第２のディスクを中心穴を中心として１回転させ
た。この２枚のディスクを圧着プレスして接着剤をディ
スク間全面に均一に展延させた。重ね合わせ後、紫外線
照射を行い、ディスクの内、外周部を硬化させた後、６
０℃オーブンで５分加熱処理を行ったところ接着剤は全
面にわたって硬化し、気泡の混入のない良好な貼り合わ
せ光記録媒体が得られた。また、貼り合わせ後のチル
ト、軸方向加速度は５mrad、５ｍ／ｓ2 となり、ともに
目標値（６mrad、７ｍ／ｓ2 ）をクリアした。この貼り
合わせ記録媒体を９０℃、８０％Ｒ．Ｈ．で環境試験を
１０００時間行ったところ外観上の変化はなく、記録膜
の腐蝕はみられなかった。Example 2 Two optical recording media in which a recording layer was formed on the entire surface except for the outer and inner peripheral portions by a sputtering method on a substrate having a diameter of 120 mm and a thickness of 0.6 mm were used. The first disk was vacuum-sucked on a rotary table, and the second disk was arranged in parallel so as to keep a distance of 2 mm directly above the first disk. Insert the discharge nozzle of each liquid of the UV-curable two-component adhesive between the two disks,
While simultaneously rotating the two disks at a rotation speed of 12 rpm, the two liquids were discharged from the discharge nozzles in a layered manner for 5 seconds so that bubbles did not enter between the disks. Before the adhesive was completely spread, the second disk was rotated once around the center hole while the first disk was fixed. The two disks were pressed under pressure to spread the adhesive evenly over the entire surface between the disks. After the superposition, ultraviolet irradiation is performed to cure the inner and outer peripheral portions of the disc.
When the heat treatment was performed in a 0 ° C. oven for 5 minutes, the adhesive was cured over the entire surface, and a good bonded optical recording medium free of air bubbles was obtained. The tilt and the axial acceleration after bonding were 5 mrad and 5 m / s 2 , and both cleared the target values (6 mrad and 7 m / s 2 ). This bonded recording medium was heated at 90 ° C. and 80% R.F. H. When an environmental test was conducted for 1,000 hours, there was no change in appearance, and no corrosion of the recording film was observed.
【００３３】実施例３ 直径１２０ｍｍ、厚さ０．６ｍｍの基板にスパッタ法に
より外周部と内周部を除く全面に記録層を成膜した光記
録媒体２枚を用いた。第１のディスクの記録層形成面の
半径４４ｍｍの円周上に、２液型接着剤の第１の液（Ａ
液）を、続いて同位置にＡ液に重ねて第２の液（Ｂ液）
をそれぞれ同心円状に吐出した。その上から第２のディ
スクを記録層形成面を内側にして自然落下し、同心に重
ね合わせた。接着剤が完全に広がらないうちに、第１の
ディスクを固定させた状態で、第２のディスクを中心穴
を中心として１回転させた。この２枚のディスクを一体
にスピンナーで高速回転させて接着剤をディスク間に均
一に展延させた。接着剤展延後６０℃オーブンで１０分
加熱処理を行ったところ接着剤は全面にわたって硬化
し、気泡の混入のない良好な貼り合わせ光記録媒体が得
られた。また、貼り合わせ後のチルト、軸方向加速度は
５mrad、５ｍ／ｓ2 となり、ともに目標値（６mrad、７
ｍ／ｓ2 ）をクリアした。この貼り合わせ記録媒体を９
０℃、８０％Ｒ．Ｈ．で環境試験を１０００時間行った
ところ外観上の変化はなく、記録膜の腐蝕はみられなか
った。Example 3 Two optical recording media were used in which a recording layer was formed on a substrate having a diameter of 120 mm and a thickness of 0.6 mm over the entire surface except for the outer and inner peripheral portions by sputtering. The first liquid (A) of the two-component adhesive is placed on the circumference of the recording layer forming surface of the first disk having a radius of 44 mm.
Liquid) and the second liquid (liquid B) at the same position
Were discharged concentrically. The second disk was naturally dropped from above with the recording layer forming surface inside, and was concentrically superimposed. Before the adhesive was completely spread, the second disk was rotated once around the center hole while the first disk was fixed. The two disks were integrally rotated at a high speed with a spinner to spread the adhesive uniformly between the disks. After the adhesive was spread, a heat treatment was performed in a 60 ° C. oven for 10 minutes. As a result, the adhesive was cured over the entire surface, and a good bonded optical recording medium free of air bubbles was obtained. In addition, the tilt and the axial acceleration after bonding are 5 mrad and 5 m / s 2 , both of which are the target values (6 mrad, 7 m
m / s 2 ). This bonded recording medium is 9
0 ° C., 80% R.C. H. When an environmental test was conducted for 1,000 hours, there was no change in appearance, and no corrosion of the recording film was observed.
【００３４】実施例４ 直径１２０ｍｍ、厚さ０．６ｍｍの基板にスパッタ法に
より外周部と内周部を除く全面に記録層を成膜した光記
録媒体２枚を用いた。第１のディスクの記録層形成面の
半径４４ｍｍの円周上に、２液型接着剤の第１の液（Ａ
液）を、続いて同位置にＡ液に重ねて第２の液（Ｂ液）
をそれぞれ同心円状に吐出した。０．７×１０3 Ｐａの
減圧下で第１のディスクの上から第２のディスクを記録
層形成面を内側にして自然落下し、同心に重ね合わせ
た。接着剤が完全に広がらないうちに、第１のディスク
を固定させた状態で、第２のディスクを中心穴を中心と
して１回転させた。この２枚のディスクを圧着プレスし
て接着剤をディスク間全面に均一に展延させた。プレス
後６０℃オーブンで１０分加熱処理を行ったところ接着
剤は全面にわたって硬化し、気泡の混入のない良好な貼
り合わせ光記録媒体が得られた。また、貼り合わせ後の
チルト、軸方向加速度は５mrad、５ｍ／ｓ2 となり、と
もに目標値（６mrad、７ｍ／ｓ2 ）をクリアした。この
貼り合わせ記録媒体を９０℃、８０％Ｒ．Ｈ．で環境試
験を１０００時間行ったところ外観上の変化はなく、記
録膜の腐蝕はみられなかった。Example 4 Two optical recording media in which a recording layer was formed on the entire surface except for the outer and inner peripheral portions by a sputtering method on a substrate having a diameter of 120 mm and a thickness of 0.6 mm were used. The first liquid (A) of the two-component adhesive is placed on the circumference of the recording layer forming surface of the first disk having a radius of 44 mm.
Liquid) and the second liquid (liquid B) at the same position
Were discharged concentrically. Under a reduced pressure of 0.7 × 10 3 Pa, the second disk was naturally dropped from above the first disk with the recording layer forming surface inside, and was concentrically superimposed. Before the adhesive was completely spread, the second disk was rotated once around the center hole while the first disk was fixed. The two disks were pressed under pressure to spread the adhesive evenly over the entire surface between the disks. After the pressing, a heat treatment was performed in a 60 ° C. oven for 10 minutes. As a result, the adhesive was cured over the entire surface, and a good bonded optical recording medium free of air bubbles was obtained. The tilt and the axial acceleration after bonding were 5 mrad and 5 m / s 2 , and both cleared the target values (6 mrad and 7 m / s 2 ). This bonded recording medium was heated at 90 ° C. and 80% R.F. H. When an environmental test was conducted for 1,000 hours, there was no change in appearance, and no corrosion of the recording film was observed.
【００３５】比較例１ 実施例１と同様の光記録媒体２枚を、第１のディスクを
固定させた状態で、第２のディスクを中心穴を中心とし
て１回転させる工程を除いた他は実施例１と同様に貼り
合わせた。重ね合わせ後６０℃オーブンで５分加熱処理
を行ったところ接着剤の吐出開始位置付近で外観に凹凸
部が生じた。２枚のディスクを剥がしたところ、外観に
凹凸が見られた部分では硬化が不十分だった。９０℃、
８０％Ｒ．Ｈ．の環境試験を行ったところ、接着剤の吐
出開始位置付近では、２５０時間で記録膜部分に腐蝕が
発生した。Comparative Example 1 Two optical recording media similar to those in Example 1 were used except that the step of rotating the second disk once around the center hole with the first disk fixed was omitted. Lamination was performed in the same manner as in Example 1. When heat treatment was carried out in a 60 ° C. oven for 5 minutes after the superposition, irregularities appeared on the appearance near the starting position of the adhesive discharge. When the two disks were peeled off, hardening was insufficient at the portions where the appearance was uneven. 90 ° C,
80% R. H. As a result of the environmental test, the recording film portion was corroded near the adhesive discharge start position in 250 hours.
【００３６】比較例２ 実施例１と同様の光記録媒体２枚を用いた。２液型接着
剤のＡ液を一方のディスクの記録層形成面に厚さ２０μ
ｍになるよう塗布した。他方のディスクにも同様にＢ液
を２０μｍ厚に塗布し、Ａ、Ｂ液塗布面を内側にして貼
り合わせたところ気泡が混入した。６０℃オーブンで５
分加熱したところ硬化が不十分であったため、１５分間
加熱したところ２液が接触している部分は硬化したが、
気泡が混入した部分は硬化が不十分だった。９０℃、８
０％Ｒ．Ｈ．の環境試験を行ったところ、２５０時間で
記録膜部分に腐蝕が発生した。Comparative Example 2 Two optical recording media similar to those in Example 1 were used. A liquid of the two-component adhesive is applied to the recording layer forming surface of one of the disks with a thickness of 20 μm.
m. Similarly, the other disk was coated with the solution B to a thickness of 20 μm and bonded together with the coating surfaces of the solutions A and B inside, and bubbles were mixed. 5 in a 60 ° C oven
When heated for 15 minutes, curing was insufficient, so when heated for 15 minutes, the part where the two liquids were in contact was cured,
The part where bubbles were mixed was insufficiently cured. 90 ° C, 8
0% R. H. When the environmental test was performed, corrosion occurred in the recording film portion in 250 hours.
【００３７】比較例３ 実施例１と同様の光記録媒体２枚を用いた。２液型接着
剤を混合し第１のディスクにドーナツ状に滴下し、その
上から第２のディスクを自然落下し、同心に重ね合わせ
て一体にスピンナーで高速回転させて接着剤を２枚のデ
ィスク間に均一に展延させた。重ね合わせ後６０℃オー
ブンで５分加熱処理を行ったところ接着剤は全面にわた
って硬化し、気泡の混入のない貼り合わせ光記録媒体が
得られた。しかしながら、接着剤層は接着剤滴下部分が
厚く、他の部分は薄くなっており、貼り合わせ後のチル
ト、軸方向加速度は７mrad、１２ｍ／ｓ2 となり目標値
を大きく下回った。Comparative Example 3 Two optical recording media similar to those used in Example 1 were used. The two-component adhesive was mixed and dropped in a donut shape on the first disk, and the second disk was dropped naturally from above, and was concentrically superimposed and integrally rotated at high speed with a spinner to apply two adhesives. Spread evenly between the disks. When heat treatment was performed in a 60 ° C. oven for 5 minutes after the superposition, the adhesive was cured over the entire surface, and a bonded optical recording medium free of air bubbles was obtained. However, the adhesive layer was thick at the adhesive dropping portion and thin at the other portions. The tilt and the axial acceleration after bonding were 7 mrad and 12 m / s 2 , which were far below the target values.
【００３８】比較例４ 実施例３と同様の光記録媒体２枚を、第１のディスクを
固定させた状態で、第２のディスクを中心穴を中心とし
て１回転させる工程を除いた他は実施例３と同様に貼り
合わせた。重ね合わせ後６０℃オーブンで５分加熱処理
を行ったところ接着剤の吐出開始位置付近で外観に凹凸
部が生じた。２枚のディスクを剥がしたところ、外観に
凹凸が見られた部分では硬化が不十分だった。９０℃、
８０％Ｒ．Ｈ．の環境試験を行ったところ、接着剤の吐
出開始位置付近では、２５０時間で記録膜部分に腐蝕が
発生した。COMPARATIVE EXAMPLE 4 The same optical recording medium as in Example 3 was used except that the first disk was fixed and the second disk was rotated once around the center hole while the first disk was fixed. Lamination was performed in the same manner as in Example 3. When heat treatment was carried out in a 60 ° C. oven for 5 minutes after the superposition, irregularities appeared on the appearance near the starting position of the adhesive discharge. When the two disks were peeled off, hardening was insufficient at the portions where the appearance was uneven. 90 ° C,
80% R. H. As a result of the environmental test, the recording film portion was corroded near the adhesive discharge start position in 250 hours.
【００３９】比較例５ 実施例４と同様の光記録媒体２枚を、２枚のディスクを
常圧下で重ね合わせ、さらに第１のディスクを固定させ
た状態で、第２のディスクを中心穴を中心として１回転
させる工程を除いた他は実施例４と同様に貼り合わせ
た。重ね合わせ後６０℃オーブンで５分加熱処理を行っ
たところ接着剤の吐出開始位置付近と吐出位置付近の同
心円上で外観に凹凸部が生じた。２枚のディスクを剥が
したところ、吐出位置付近の同心円上では気泡が混入し
ており、外観に凹凸が見られた部分では硬化が不十分だ
った。９０℃、８０％Ｒ．Ｈ．の環境試験を行ったとこ
ろ、接着剤の吐出開始位置付近と吐出位置付近の同心円
上では、２５０時間で記録膜部分に腐蝕が発生した。COMPARATIVE EXAMPLE 5 Two optical recording media similar to those in Example 4 were superposed on each other under normal pressure, and the second disc was fixed to the center hole with the first disc fixed. Except for excluding the step of making one rotation as the center, bonding was performed in the same manner as in Example 4. When heat treatment was performed in a 60 ° C. oven for 5 minutes after the superposition, irregularities appeared on the concentric circles near the discharge start position and the discharge position of the adhesive. When the two disks were peeled off, air bubbles were mixed in concentric circles near the ejection position, and curing was insufficient at portions where the appearance was uneven. 90 ° C., 80% R.C. H. As a result of the environmental test, the recording film portion was corroded in 250 hours on the concentric circles near the discharge start position and the discharge position of the adhesive.
【００４０】[0040]
【発明の効果】上述の実施例からも明らかなように、本
発明の製造方法を用いて光記録媒体を接合することによ
り、紫外線など硬化光がほとんど透過しない記録膜が形
成された部分の樹脂についても短時間で硬化させること
が可能であり、かつ剥離が生じにくく、信頼性および耐
久性に優れた光記録媒体を作製することができる。As is clear from the above-described embodiments, by joining the optical recording media using the manufacturing method of the present invention, the resin at the portion where the recording film which hardly transmits the curing light such as ultraviolet light is formed is formed. Can be cured in a short time, and peeling hardly occurs, and an optical recording medium excellent in reliability and durability can be manufactured.
Claims (10)
向面上に記録層が設けてあり、両対向面が接着剤で貼り
合わされてなる光記録媒体の製造方法であって、該接着
剤として２液型接着剤を用い、かつ該２液型接着剤の各
々の液を独立して前記基板に塗布する第１の工程と、２
枚の基板を該２液型接着剤を挟んで重ね合わせた後、独
立に塗布された２液型接着剤の各々の液を混合する第２
の工程と、該混合した２液型接着剤を基板間に広げる第
３の工程と、接着剤を硬化させる第４の工程とを備えた
ことを特徴とする光記録媒体の製造方法。1. A method for manufacturing an optical recording medium, comprising: a recording layer provided on at least one opposing surface of two opposing substrates; and both opposing surfaces bonded together with an adhesive. A first step of using a two-part adhesive as the first step and independently applying each liquid of the two-part adhesive to the substrate;
After the two substrates are overlapped with the two-component adhesive sandwiched therebetween, the respective liquids of the independently applied two-component adhesive are mixed.
And a third step of spreading the mixed two-component adhesive between the substrates, and a fourth step of curing the adhesive.
の中心穴を中心とした同心円状に、かつ該基板垂直方向
に層状に供給することを特徴とする請求項１記載の光記
録媒体の製造方法。2. The method according to claim 1, wherein in the first step, the two-component adhesive is supplied concentrically around a center hole of the substrate and in a layered manner in a direction perpendicular to the substrate. A method for manufacturing an optical recording medium.
た後、該２液型接着剤を挟んで、該２枚の基板を中心穴
を中心として相対回転させることを特徴とする請求項１
または請求項２記載の光記録媒体の製造方法。3. The second step is characterized in that, after the two substrates are overlaid, the two substrates are relatively rotated about the center hole with the two-liquid adhesive therebetween. Claim 1
A method for manufacturing an optical recording medium according to claim 2.
合わせる一方の基板に吐出し、もう一方の基板を重ね合
わせることを特徴とする請求項１ないし請求項３のいず
れかに記載の光記録媒体の製造方法。4. The method according to claim 1, wherein in the first step, the two-component adhesive is discharged onto one of the substrates to be bonded and the other substrate is overlaid. The manufacturing method of the optical recording medium according to the above.
る２枚の基板を対向配置させ、該２枚の基板間に２液型
接着剤を注入することを特徴とする請求項１ないし請求
項３のいずれかに記載の光記録媒体の製造方法。5. The method according to claim 1, wherein in the first step, two substrates constituting the optical recording medium are arranged to face each other, and a two-component adhesive is injected between the two substrates. A method for manufacturing an optical recording medium according to claim 3.
ね合わせることを特徴とする請求項１ないし請求項５の
いずれかに記載の光記録媒体の製造方法。6. The method for manufacturing an optical recording medium according to claim 1, wherein in the second step, two substrates are superposed under reduced pressure.
を一体的に回転させることを特徴とする請求項１ないし
請求項６のいずれかに記載の光記録媒体の製造方法。7. The method for manufacturing an optical recording medium according to claim 1, wherein in the third step, the two superposed substrates are integrally rotated.
を圧着プレスすることを特徴とする請求項１ないし請求
項６のいずれかに記載の光記録媒体の製造方法。8. The method for manufacturing an optical recording medium according to claim 1, wherein in the third step, the two superposed substrates are pressed under pressure.
を行うことを特徴とする請求項１ないし請求項８のいず
れかに記載の光記録媒体の製造方法。9. The method for manufacturing an optical recording medium according to claim 1, wherein a heat treatment at 100 ° C. or lower is performed in the fourth step.
重合促進剤のうち、いずれか一方を、第２の液は他方を
含有することを特徴とする請求項１ないし請求項９のい
ずれかに記載の光記録媒体の製造方法。10. The method according to claim 1, wherein the first liquid of the two-part adhesive contains one of a curing catalyst and a polymerization accelerator, and the second liquid contains the other. Item 10. The method for manufacturing an optical recording medium according to any one of Items 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10251217A JP2000040271A (en) | 1998-05-19 | 1998-09-04 | Production optical recording medium |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13668798 | 1998-05-19 | ||
| JP10-136687 | 1998-05-19 | ||
| JP10251217A JP2000040271A (en) | 1998-05-19 | 1998-09-04 | Production optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000040271A true JP2000040271A (en) | 2000-02-08 |
Family
ID=26470195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10251217A Pending JP2000040271A (en) | 1998-05-19 | 1998-09-04 | Production optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000040271A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003046097A1 (en) * | 2001-11-30 | 2003-06-05 | Krauss-Maffei Kunststofftechnik Gmbh | Method for the production of a data support from two half sides |
-
1998
- 1998-09-04 JP JP10251217A patent/JP2000040271A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003046097A1 (en) * | 2001-11-30 | 2003-06-05 | Krauss-Maffei Kunststofftechnik Gmbh | Method for the production of a data support from two half sides |
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