JPH01276447A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH01276447A JPH01276447A JP63107020A JP10702088A JPH01276447A JP H01276447 A JPH01276447 A JP H01276447A JP 63107020 A JP63107020 A JP 63107020A JP 10702088 A JP10702088 A JP 10702088A JP H01276447 A JPH01276447 A JP H01276447A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- recording
- optical recording
- recording medium
- silicone
- 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
- 230000003287 optical effect Effects 0.000 title claims description 29
- 239000000853 adhesive Substances 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 239000013464 silicone adhesive Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 abstract description 12
- 229920001296 polysiloxane Polymers 0.000 abstract description 10
- 239000005060 rubber Substances 0.000 abstract description 10
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011888 foil Substances 0.000 abstract description 2
- 229920001721 polyimide Polymers 0.000 abstract description 2
- 239000004642 Polyimide Substances 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 239000002313 adhesive film Substances 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000008096 xylene Substances 0.000 description 4
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 229920006267 polyester film Polymers 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000003522 acrylic cement Substances 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000007611 bar coating method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明はレーザー・・で情報の記録及び/又は再生を行
う光ディスク、光カード等の光記録媒体の構造に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an optical recording medium such as an optical disk or an optical card that records and/or reproduces information using a laser.
[従来の技術]
従来、光記録媒体の記録膜を保護する方法としては、(
イ)エアーサンドイッチ構造とする方法、([+)有機
物又は無機物の保護層を形成するか、記録膜を内側にし
て複数の基板を貼り合わせる(以下これらを複層型とい
う)方法等が提案されている。しかし、前者(イ)の場
合、内部が中空であるので、機械的強度が低く、また、
大きな温度変化を与えると反りが発生したり、中空部に
水分が結露するために良好な記録再生が困難である。[Prior Art] Conventionally, as a method for protecting the recording film of an optical recording medium, (
b) A method of forming an air sandwich structure, ([+) A method of forming a protective layer of organic or inorganic material, or a method of bonding multiple substrates with the recording film inside (hereinafter referred to as multilayer type), etc. have been proposed. ing. However, in the case of the former (a), the interior is hollow, so the mechanical strength is low, and
If a large temperature change is applied, warping occurs or moisture condenses in the hollow portion, making it difficult to record and reproduce well.
後者(rl)の複層型光記録媒体には、第4図ないし第
5図の断面概略図に示すような構造がある。The latter (rl) multilayer optical recording medium has a structure as shown in the cross-sectional schematic diagrams of FIGS. 4 and 5.
ここで保護層12は記録膜11に対して良好な接着強度
を有する必要がある。このような保護膜としてはエポキ
シ樹脂、熱硬化樹脂、熱可塑性樹脂、光硬化型樹脂等が
公知である。しかしながら、上記あ
樹脂は(イ)剛性が・く、レーザ光を煎射することによ
り形状を変化せしめる記録媒体の場合には、記録ビット
の形成を妨害・、結果として記録に高いレーザパワーが
必要である、(l])硬化時間が長く生産性が低い等の
問題点がある。Here, the protective layer 12 needs to have good adhesive strength to the recording film 11. Epoxy resins, thermosetting resins, thermoplastic resins, photocurable resins, and the like are known as such protective films. However, the above-mentioned resin is (a) rigid, and in the case of a recording medium whose shape is changed by irradiation with laser light, it can interfere with the formation of recording bits, and as a result, high laser power is required for recording. (l)) There are problems such as long curing time and low productivity.
そこで、特に記録感度の低下を改善する目的で、例えば
特開昭58−203095号において、シリコンゴム等
のゴム弾性高分子層を設ける技術が開示されている。Therefore, for the purpose of particularly improving the decrease in recording sensitivity, for example, Japanese Patent Laid-Open No. 58-203095 discloses a technique of providing a rubber elastic polymer layer such as silicone rubber.
[発明が解決しようとする課題]
本発明は上記問題点に鑑みてなされたもので、記録感度
が高く、且つ長期間高い信頼性の得られる複層型光記録
媒体を、生産住良(且つ安価に提供することを目的とす
る。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems. The aim is to provide it at a low price.
[課題を解決するための手段]
本発明の上記目的は、少なくとも一枚の表面に記録膜を
有する合成樹脂等の基板またはフィルム等からなる複数
の基体を粘着剤を介して接合することにより達成される
。[Means for Solving the Problems] The above object of the present invention is achieved by bonding a plurality of substrates made of synthetic resin substrates or films having a recording film on at least one surface via an adhesive. be done.
ここで粘着剤とは指圧程度の圧力で敏感に相手に付着す
る接着剤を意味し、感圧性接着剤とも呼ばれる。該粘着
剤は、粘弾性体で、固体と液体の二面的な性質を有して
おり、圧力で流動して被着面に接触し、固化過程なしに
必要な接着強さを示す。(例えば「接着ハンドブック(
日本接着協会編)」に記載させている。)該粘着剤はゴ
ム弾性体と、これに相溶性の良い粘着付与樹脂または可
塑剤等から成る。主成分である弾性体の種類によって、
シリコン系、ゴム系、アクリル系、その池の系(ポリビ
ニルエーテル系等)に分類される。Here, the adhesive refers to an adhesive that sensitively adheres to an object with pressure similar to finger pressure, and is also called a pressure-sensitive adhesive. The adhesive is a viscoelastic material and has dual properties of solid and liquid, flows under pressure and comes into contact with the surface to which it is adhered, and exhibits the necessary adhesive strength without a solidification process. (For example, "Adhesive Handbook (
(edited by Japan Adhesive Association). ) The adhesive consists of a rubber elastic body and a tackifying resin or plasticizer that is compatible with the rubber elastic body. Depending on the type of elastic body that is the main component,
They are classified into silicone-based, rubber-based, acrylic-based, and other types (polyvinyl ether-based, etc.).
本発明にはこれらの中から幅広く適用することができる
。中でもシリコン系粘着剤を適用すれば記録感度が高く
、最も好適に用いられる。A wide range of these methods can be applied to the present invention. Among them, a silicone adhesive is most preferably used because it provides high recording sensitivity.
本発明で好適に用いられるシリコン系粘着剤とは、少な
くともシロキサン結合を骨格とした直鎖状のシリコン生
ゴムをエラストマー成分として含有し、且つ、シロキサ
ン結合を骨格とした架橋度の高い網目構造をもつシリコ
ンレジンをタッキファイヤ−成分として含有する粘着剤
である。記録@度はシリコン系粘着剤のエラストマー成
分とタッキファイヤ−成分との相溶性及び分散状態に大
きく関係することから、分子量がtoooooから10
00000より好ましくは250000から80000
0のシリコン生ゴムを、シリコンレジンに対して重量比
で0.5から2.0より好ましくは0.8から1.4の
範囲で混合した粘着剤が好ましい。又、該シリコン系粘
着剤はベンゾイルパーオキサイドなどの有機過酸化物等
を混合し、加熱により分解生成する高活性のフリーラジ
カルを開始剤とした架橋反応を生起せしめることにより
凝集力等の特性を改善することがより好ましい。尚、過
酸化物は粘着剤に対して重量比で0.1以下、より好ま
しくは0.05以下添加されることが望ましい。多量に
添加した場合には、粘着剤が硬(なり記録感度が低下す
ることがある。The silicone-based adhesive preferably used in the present invention is one that contains at least linear silicone raw rubber with a skeleton of siloxane bonds as an elastomer component, and has a highly crosslinked network structure with a skeleton of siloxane bonds. This adhesive contains silicone resin as a tackifier component. The degree of recording is largely related to the compatibility and dispersion state of the elastomer component and tackifier component of the silicone adhesive.
00000 more preferably 250000 to 80000
A pressure-sensitive adhesive in which 0.0 silicone raw rubber is mixed with silicone resin in a weight ratio of 0.5 to 2.0, more preferably 0.8 to 1.4 is preferable. In addition, the silicone adhesive has properties such as cohesive strength by mixing organic peroxides such as benzoyl peroxide and causing a crosslinking reaction using highly active free radicals that are decomposed and generated by heating as an initiator. It is more preferable to improve. Note that it is desirable that the peroxide be added in a weight ratio of 0.1 or less, more preferably 0.05 or less, to the adhesive. If a large amount is added, the adhesive may become hard and the recording sensitivity may decrease.
上述の配合組成から成るシリコン系粘着剤の優れている
点として、(イ)耐候性、耐水性、耐薬品性に優れると
共に、それらの性質が長2期間変化しない、(o)−5
0°Cから250°C程度の広い温度範囲にわたって良
好な粘着力を発現する、(八)生体に対する刺激性が低
い等を挙げることができる。The advantages of the silicone adhesive having the above-mentioned composition are (a) excellent weather resistance, water resistance, and chemical resistance, and these properties do not change for a long period of time; (o) -5
It exhibits good adhesive strength over a wide temperature range from about 0°C to 250°C, and (8) has low irritation to living organisms.
本発明において用いられるシリコン系粘着剤の具体例は
K R−101−10,K R−130(信越化学工業
社’m) ; S H−42130,S D−4570
(トーレ・シリコーン社製) : Y R−3340
、Y R−32H(東芝シリコーン社製)等である。こ
れらはバーコード法、デイツプ法、スピンコード法等の
方法ニより簡便に塗布することができる。また、化学反
応により硬化が進行するシリコン系接着剤等と異なり硬
化時間を必要としないので、生産性が向上する。Specific examples of silicone adhesives used in the present invention are K R-101-10, K R-130 (Shin-Etsu Chemical Co., Ltd.'m); S H-42130, S D-4570.
(Manufactured by Torre Silicone): Y R-3340
, YR-32H (manufactured by Toshiba Silicone Corporation), and the like. These can be more easily applied by methods such as bar code method, dip method, spin code method, etc. Furthermore, unlike silicone-based adhesives that harden through chemical reactions, curing time is not required, so productivity is improved.
ゴム系粘着剤の弾性体としては天然ゴムや、合成インプ
レンゴム、ブタジェン−スチレンゴム等の合成ゴムを挙
げることができる。また、可望的′効果と接着性を付与
する粘着性付与樹脂としては、天然物系のロジン及びそ
の誘導体、テルペン系、石油系ではC6系、C9系、C
3とC0の共重合系等を挙げることができる。更に、粘
着剤の特性を改体例は、#813、#821W(大日本
インキ化学工業社製) : No、513 (日東電
気工業社!lり等である。Examples of the elastic body of the rubber adhesive include natural rubber, synthetic rubber such as synthetic in-prene rubber, and butadiene-styrene rubber. In addition, tackifying resins that impart desirable effects and adhesive properties include natural rosins and their derivatives, terpene-based resins, and petroleum-based tackifiers such as C6-based, C9-based, and C9-based tackifiers.
Examples include copolymerization systems of 3 and C0. Further, examples of modified adhesive properties include #813, #821W (manufactured by Dainippon Ink & Chemicals): No., 513 (manufactured by Nitto Electric Industries, Ltd.), etc.
また、本発明で用いられるアクリル系粘着剤のアクリル
ポリマーは、アクリル酸ブチル、アクリル酸−2−エチ
ルヘキシルなどの粘着性を有する低ガラス転移温度のポ
リマーを形成するモノマーを主成分とし、凝集力を向上
させる成分としてメタクリル酸メチル、アクリル酸メチ
ル、酢酸ビニルなど高ガラス転移温度のポリマーを形成
するモツマ−1及びアクリル酸、アクリル酸−2−ヒド
ロキシエチルなど接着力向上と架橋起点となり得る官能
基を有するモノマーを配合して成るポリマーを挙げるこ
とができる。また、凝集力を向上させる架橋剤としては
、インシアネート化合物、金属イオン、金属キレート、
エポキシ、メラミン及び尿素系化合物等を挙げることが
できる。更に、粘着性付与樹脂としては、ロジン系、テ
ルペン系、C3系及びC6とC0の共重合系の石油樹脂
、キシレン系樹脂、フェノール系樹脂及びこれらの変性
樹脂等を挙げることができる。また粘着剤の特性を改善
する目的で、同様に可塑剤、老化防止剤等を添加しても
良い。上記アクリル系粘着剤の具体例は、M C−,1
000、M C−2000、No、 532、No、
535A 、 No、 537 (日東電気工業社製)
、DF715、DF 8320、DF8515S (東
洋インキ製造社製);#8625PW、 #86250
AW (大日本インキ化学社製);T4090、N P
308 (ソニーケミカル社製)等である。In addition, the acrylic polymer used in the acrylic adhesive used in the present invention is mainly composed of monomers that form adhesive, low glass transition temperature polymers such as butyl acrylate and 2-ethylhexyl acrylate, and has a high cohesive force. Components that improve adhesion include motsuma-1, which forms polymers with high glass transition temperatures, such as methyl methacrylate, methyl acrylate, and vinyl acetate, and functional groups that can improve adhesive strength and serve as crosslinking starting points, such as acrylic acid and 2-hydroxyethyl acrylate. Examples include polymers formed by blending monomers having the following properties. In addition, as crosslinking agents that improve cohesive force, incyanate compounds, metal ions, metal chelates,
Examples include epoxy, melamine, and urea compounds. Furthermore, examples of the tackifying resin include rosin-based, terpene-based, C3-based, and copolymerized petroleum resins of C6 and CO, xylene-based resins, phenol-based resins, and modified resins thereof. Furthermore, for the purpose of improving the properties of the adhesive, plasticizers, anti-aging agents, etc. may be added. A specific example of the acrylic adhesive is M C-,1
000, MC-2000, No. 532, No.
535A, No., 537 (manufactured by Nitto Electric Industry Co., Ltd.)
, DF715, DF 8320, DF8515S (manufactured by Toyo Ink Manufacturing Co., Ltd.); #8625PW, #86250
AW (manufactured by Dainippon Ink Chemical Co., Ltd.); T4090, NP
308 (manufactured by Sony Chemical Company), etc.
第1図ないし第3図は本発明に係る光記録媒体の例を示
す断面概略図である。合成樹脂等の基板、および記録膜
が該粘着剤調製時に含まれる溶剤(例工ばトルエン、キ
シレン)に対して安定であれば、粘着剤30は基板10
および記録膜11に溶剤を含んだ状態で直接塗布できる
。安定でない場合は、従来公知のエポキシ樹脂等ではも
はや使用が不可能であるのに対して、本発明の粘着剤は
使用可能である。例えばポリエステルフィルム、ポリイ
ミドフィルム、四フッ化エチレンフィルム、アルミ箔、
シリコンガラスクロス等の材料(以下基材40という)
に粘着剤30を塗布したのちに、第2図および第3図の
部分断面図に示すように記録膜11に貼り合わせれば良
い。基材には光記録媒体の耐擦傷性機能及び耐屈曲性機
能を付与することもできる。また、基材がテープ状であ
る場合には、該基材の片面又は両面に粘着剤を塗布した
ものを順次光記録媒体の積層工程に流すことによりさら
に生産性が向上する。1 to 3 are schematic cross-sectional views showing examples of optical recording media according to the present invention. If the substrate such as a synthetic resin and the recording film are stable to the solvent (for example, toluene, xylene) contained in the preparation of the adhesive, the adhesive 30 is compatible with the substrate 10.
Also, it can be applied directly to the recording film 11 in a state containing a solvent. If it is not stable, conventionally known epoxy resins and the like can no longer be used, but the adhesive of the present invention can be used. For example, polyester film, polyimide film, tetrafluoroethylene film, aluminum foil,
Materials such as silicon glass cloth (hereinafter referred to as base material 40)
After applying the adhesive 30 to the substrate, it may be bonded to the recording film 11 as shown in the partial cross-sectional views of FIGS. 2 and 3. The substrate can also be provided with scratch resistance and bend resistance functions for optical recording media. Furthermore, when the base material is in the form of a tape, productivity can be further improved by applying a pressure-sensitive adhesive on one or both sides of the base material and sequentially passing it through the process of laminating optical recording media.
本発明において用いられる粘着剤は、記録用レル
ーザ・・・の照射による発熱によって記録膜に形状変化
又は光学的変化を生ぜしめる追記型光記録媒体のみなら
ず、偏光方向の回転により信号゛の有無を検出する光磁
気方式や屈折率等の光学的性質の変化により信号の有無
を検出する相変化方式等の書き換え可能型光記録媒体に
も用いることができる。特に、本発明に係る粘着剤を用
いれば、レーザ光を照射することにより形状を変化せし
める記録媒体の場合には、記録ピットの形成が容易であ
るので、高い記録感度が得られ、特に好適に用いること
ができる。なお、記録膜の片面又は両面に、光記録媒体
の性能を高める目的で補助層が設けられていても良い。The adhesive used in the present invention is applicable not only to write-once optical recording media that cause shape changes or optical changes in the recording film due to heat generated by the irradiation of the recording reluzer, but also to It can also be used in rewritable optical recording media, such as a magneto-optical method that detects a signal, or a phase change method that detects the presence or absence of a signal based on a change in optical properties such as refractive index. In particular, if the adhesive according to the present invention is used for a recording medium whose shape is changed by irradiation with laser light, recording pits can be easily formed, so high recording sensitivity can be obtained, making it particularly suitable. Can be used. Note that an auxiliary layer may be provided on one or both sides of the recording film for the purpose of improving the performance of the optical recording medium.
[実施例] 以下、実施例により本発明を更に詳しく説明する。[Example] Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例1
射出成形により得られた円盤状のポリカーボネート基板
を2枚用意し、峰基板の案内溝を有する面にPt−5e
−Biから成る記録層を形成した。両記録層を内側にし
て、大日本インキ化学工業社製のゴム系両面粘着テープ
#821により2枚の基板を接合し、第3図の構造の光
記録媒体を得た。該光記録媒体を用いてIMHzの単一
周波数情報の記録再生を行ったところ、記録ピットが容
易に形成され、CN R= 48dBの良好な特性を示
した。また該光記録媒体を70°C,80%R)Iの雰
囲気中に1000時間放置しても特性の劣化は認められ
なかった。Example 1 Two disc-shaped polycarbonate substrates obtained by injection molding were prepared, and Pt-5e was coated on the surface of the peak substrate with the guide groove.
-A recording layer made of Bi was formed. With both recording layers facing inside, the two substrates were bonded using rubber-based double-sided adhesive tape #821 manufactured by Dainippon Ink & Chemicals Co., Ltd. to obtain an optical recording medium having the structure shown in FIG. 3. When single frequency information of IMHz was recorded and reproduced using the optical recording medium, recording pits were easily formed and good characteristics of CNR=48 dB were exhibited. Further, no deterioration of the characteristics was observed even when the optical recording medium was left in an atmosphere of 70° C. and 80% R)I for 1000 hours.
実施例2
実施例1の粘着テープに代えて、日東電気工業社製のア
クリル系両面粘着テープM C−2000を用いた第3
図の構造の光記録媒体は、IMHzの単一周波数情報の
記録再生動作においてCN R= 49dBの良好な特
性を示した。また、該光記録媒体は、70’C,80%
R)I雰囲気中に1000時間放置しても特性の劣化は
認められなった。Example 2 In place of the adhesive tape of Example 1, a third acrylic double-sided adhesive tape MC-2000 manufactured by Nitto Electric Industries, Ltd. was used.
The optical recording medium having the structure shown in the figure showed good characteristics of CNR=49 dB in the recording and reproducing operation of single frequency information of IMHz. Further, the optical recording medium is 70'C, 80%
R) No deterioration of characteristics was observed even after being left in an I atmosphere for 1000 hours.
実施例3
分子量が500000のシリコン生ゴムおよび分子量2
000のシリコンレジンから成るシリコン系粘着剤のト
ルエン/キシレン混合溶液を厚さ100μmのポリエス
テルフィルム(基材)の片面にバーコート法により塗布
した。このフィルムを150°Cにて3分間焼き付けを
行うことにより糊厚100μmの粘着フィルムを作製し
た。次に実施例1の粘着テープに代えて該シリコン系粘
着フィルムの糊面を除々に前記記録層に気泡が入らない
ように押し拍てることにより、第2図の構造の光記録媒
体を得た。該光記録媒体を用いて情報の記録再生を行っ
たところ、記録に必要なレーザパワーは実施例1および
2の1/2であって、CN R= 52dBを示した。Example 3 Silicone rubber with a molecular weight of 500,000 and molecular weight 2
A toluene/xylene mixed solution of a silicone adhesive consisting of 000 silicone resin was coated on one side of a 100 μm thick polyester film (substrate) by a bar coating method. This film was baked at 150°C for 3 minutes to produce an adhesive film with an adhesive thickness of 100 μm. Next, instead of using the adhesive tape of Example 1, the adhesive side of the silicone-based adhesive film was gradually pressed to prevent air bubbles from entering the recording layer, thereby obtaining an optical recording medium having the structure shown in Fig. 2. . When information was recorded and reproduced using the optical recording medium, the laser power required for recording was 1/2 that of Examples 1 and 2, and CNR = 52 dB.
また、70°C185%R1(の雰囲気中に1000時
間放置しても特性は劣・しなかった。In addition, even when left in an atmosphere of 185% R1 at 70° C. for 1000 hours, the characteristics did not deteriorate.
実施例4
実施例3に記載したシリコン系粘着剤のトルエン/キシ
レン混合溶液にベンゾイルパーオキサイドを不揮発成分
に対して2重量%添加した材料を厚さ100μmのポリ
エステルフィルムの片面にバーコード法により塗布した
。このフィルムを130℃にて3分間、さらに180°
Cにて3分間焼き付けを行うことにより糊厚100μm
の粘着フィルムを作製した。この粘着フィルムを用いた
第2図の構造の光記録媒体は実施例3と同様にきわめて
良好な記録再生特性および経時安定性を示した。Example 4 A material obtained by adding 2% by weight of benzoyl peroxide based on the non-volatile components to the toluene/xylene mixed solution of the silicone adhesive described in Example 3 was coated on one side of a 100 μm thick polyester film by the barcode method. did. This film was heated to 130°C for 3 minutes, then heated to 180°C.
By baking for 3 minutes at C, the glue thickness is 100 μm.
An adhesive film was prepared. The optical recording medium having the structure shown in FIG. 2 using this adhesive film exhibited extremely good recording/reproducing characteristics and stability over time, as in Example 3.
比較例
実施例・のシリコン系粘着剤に代え、2液常昌では情報
の記録は不可能であった。Comparative Examples In place of the silicone-based adhesive in Example 2, it was not possible to record information using a two-liquid Tosho.
[発明の効果]
以上述べた通り、本発明に従えば記録再生特性が良好で
、かつ長期間高い信穎性の得られる光記録媒体を、生産
性良く提供することができる。特にレーザ光による記録
膜の形状変化により記録される光記録媒体では高い記録
感度が得られる。[Effects of the Invention] As described above, according to the present invention, it is possible to provide an optical recording medium with good recording and reproducing characteristics and high reliability over a long period of time with good productivity. In particular, high recording sensitivity can be obtained in optical recording media in which recording is performed by changing the shape of the recording film caused by laser light.
第1図ないし第3図は本発明に係る光記録媒体の例を示
す断面概略図、第4図および第5図は光記録媒体の従来
例を示す断面概略図である。
lO・・・・・・・・・・・・・・・・・基板、11・
・・・・・・・・・・・・・・・・記録膜、12・・・
・・・・・・・・・・・・−保護膜、30・・・・・・
・・・・・・・・・・・粘着剤層、40・・・・・・・
・・・・・・・・・・基材。
特許出願人 株式会社 り ラ し
代 理 人 弁理人 本多 堅
第 1 図
/−10
第2図
第6図
ρ101 to 3 are schematic cross-sectional views showing examples of optical recording media according to the present invention, and FIGS. 4 and 5 are schematic cross-sectional views showing conventional examples of optical recording media. lO・・・・・・・・・・・・・・・Substrate, 11・
・・・・・・・・・・・・・・・Recording film, 12...
・・・・・・・・・・・・-Protective film, 30・・・・・・
......Adhesive layer, 40...
··········Base material. Patent applicant Rira Co., Ltd. Attorney Kendai Honda Figure 1/-10 Figure 2 Figure 6 ρ10
Claims (3)
体を粘着剤を介して接合して成る光記録媒体。(1) An optical recording medium formed by bonding a plurality of substrates each having a recording film on at least one surface via an adhesive.
とする請求項1記載の光記録媒体。(2) The optical recording medium according to claim 1, wherein the adhesive is a silicone adhesive.
ることを特徴とする請求項1または2記載の光記録媒体
。(3) The optical recording medium according to claim 1 or 2, wherein recording is performed by changing the shape of the recording film by laser light.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63107020A JPH01276447A (en) | 1988-04-27 | 1988-04-27 | Optical recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63107020A JPH01276447A (en) | 1988-04-27 | 1988-04-27 | Optical recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01276447A true JPH01276447A (en) | 1989-11-07 |
Family
ID=14448478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63107020A Pending JPH01276447A (en) | 1988-04-27 | 1988-04-27 | Optical recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01276447A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005530024A (en) * | 2002-06-19 | 2005-10-06 | スリーエム イノベイティブ プロパティズ カンパニー | Radiation curable, solventless and printable pressure sensitive adhesive precursors |
-
1988
- 1988-04-27 JP JP63107020A patent/JPH01276447A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005530024A (en) * | 2002-06-19 | 2005-10-06 | スリーエム イノベイティブ プロパティズ カンパニー | Radiation curable, solventless and printable pressure sensitive adhesive precursors |
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