JPS59185631A - Manufacture of record disk - Google Patents
Manufacture of record diskInfo
- Publication number
- JPS59185631A JPS59185631A JP58061133A JP6113383A JPS59185631A JP S59185631 A JPS59185631 A JP S59185631A JP 58061133 A JP58061133 A JP 58061133A JP 6113383 A JP6113383 A JP 6113383A JP S59185631 A JPS59185631 A JP S59185631A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- added
- polyvinyl chloride
- stumper
- vinyl chloride
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
Abstract
Description
【発明の詳細な説明】
本発明はレコードディスクの製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a record disc.
いわゆるＬＰレコードと称する音楽用レコードディスク
は、基本的には硬質塩化ビニル樹脂を主成分としている
が、スタンパ成形時の流動性を良くするために比較的低
重合度の塩化ビニル系樹脂が使用されている。Music record discs, so-called LP records, are basically made of hard vinyl chloride resin, but vinyl chloride resin with a relatively low degree of polymerization is used to improve fluidity during stamper molding. ing.
このため、得られるレコードディスクの表面硬度が低く
、ピックアツプ針の針圧をきわめて低い状態にして演奏
しなければならず、釘と音溝との望ましい接触が行われ
なくなり、高忠実度再生が著しく阻害されることになる
。For this reason, the resulting record disc has a low surface hardness, and must be played with extremely low stylus pressure on the pickup needle, which prevents the desired contact between the nail and the sound groove, resulting in significantly lower high-fidelity playback. It will be hindered.
また、従来のレコードディスクにおいては、塩化ビニル
系樹脂にステアリン酸鉛、ステアリン酸カドミウム、ス
テアリン酸バリウム等のステアリン酸金属石鹸を添加し
、スタンパ成形時にｄ３ける流動性および熱安定性を付
与しているが、このような添加剤は経時的に、あるいは
ビックアンプ針で摩擦しているうちに表面にブルームし
、これがピックアツプ針に付着して音溝との望ましい接
触が行われなくなり、高忠実度再生が阻害されることも
本発明者等によって確認されている。In addition, in conventional record discs, stearate metal soaps such as lead stearate, cadmium stearate, and barium stearate are added to vinyl chloride resin to provide d3 fluidity and thermal stability during stamper molding. However, over time or during friction with the big amp needle, these additives can bloom on the surface and adhere to the pickup needle, preventing it from making the desired contact with the groove, resulting in high fidelity. The present inventors have also confirmed that regeneration is inhibited.
本発明は表面硬度の低さやブルームに起因するピックア
ツプ針と音溝との接触の不確実性を一掃し、高忠度再生
を実現できるレコードディスクの製造方法の提供を目的
とするものである。An object of the present invention is to provide a method for manufacturing a record disc that eliminates uncertainties in the contact between the pickup needle and the sound groove caused by low surface hardness and bloom, and can realize high-fidelity playback.
すなわち、本発明は平均重合度が４００〜８００の塩化
ビニル系樹脂１００重量部に対してポリオレフィン樹脂
０．１〜５重量部を主体として含有し、これに有機錫化
合物および多官能モノマを添加してなる塩化ビニル系樹
脂〕ンパウンドをスタンパ成形し、しかる後電離性放射
線を照射して架橋シしめることを特徴とするものである
。That is, the present invention mainly contains 0.1 to 5 parts by weight of a polyolefin resin based on 100 parts by weight of a vinyl chloride resin having an average degree of polymerization of 400 to 800, and an organic tin compound and a polyfunctional monomer are added thereto. It is characterized by stamper molding a vinyl chloride resin compound made of polyvinyl chloride, and then crosslinking it by irradiating it with ionizing radiation.
本発明において、塩化ビニル系樹脂としては、塩化ビニ
ル樹脂は勿論のこと、塩化ビニルを主体とする共重合樹
脂、たとえば塩化ビニル−酢酸ビニル共重合樹脂、塩化
ビニル−無水マレイン酸共重合樹脂、塩化ビニル−無水
フマル酸共重合樹脂、塩化ビニル−メタクリル酸共重合
樹脂、塩化ヒニルー塩化ビニリデン共重合樹脂などがあ
げられる。In the present invention, vinyl chloride resins include not only vinyl chloride resins but also copolymer resins mainly composed of vinyl chloride, such as vinyl chloride-vinyl acetate copolymer resins, vinyl chloride-maleic anhydride copolymer resins, Examples include vinyl-fumaric anhydride copolymer resin, vinyl chloride-methacrylic acid copolymer resin, and vinyl chloride-vinylidene chloride copolymer resin.
かかる塩化ビニル系樹脂は平均重合度が４． ＯＯ〜８
００の範囲のものが好ましく、／１． Ｏ０未満である
と成形後の強度が不十分であり、８００を越えると流動
性が悪くスタンパの溝通りの転写性が損われる。Such vinyl chloride resin has an average degree of polymerization of 4. OO～8
Preferably, it is in the range of 00, /1. If it is less than O0, the strength after molding will be insufficient, and if it exceeds 800, the fluidity will be poor and the transferability of the stamper along the grooves will be impaired.
ポリオレフィン樹脂はスタンパとの型離れを良くするた
めに添加するものであり、またこの樹脂は混入量が約５
重量％以下であれば塩化ビニル系樹脂との相溶性が良い
ためブルームを起こすことがない。The polyolefin resin is added to improve the separation from the stamper, and the amount of this resin mixed is approximately 5.
If it is less than % by weight, it has good compatibility with the vinyl chloride resin and does not cause blooming.
具体的にはポリエチレン、ポリプロピレンの如きワック
ス性ポリオレフィン重合体があげられ、これらは単独ま
たは２以上組合Ｕて塩化ビニル系樹脂に混合される。Specific examples include waxy polyolefin polymers such as polyethylene and polypropylene, which may be mixed alone or in combination of two or more with the vinyl chloride resin.
ポリオレフィン樹脂の添加量は塩化ビニル系樹脂１００
重量部に対して０．１〜５重量部の範囲とする必要があ
り、０．１重量部未満ではスタンパとの型離れ性が不十
分であり、５重量部を越えると塩化ビニル系樹脂との相
溶性が損われ、相互分離を起して混練ないし成形不能と
なる。The amount of polyolefin resin added is vinyl chloride resin 100%
It needs to be in the range of 0.1 to 5 parts by weight; if it is less than 0.1 parts by weight, the mold releasability from the stamper will be insufficient, and if it exceeds 5 parts by weight, it will not be able to separate from the vinyl chloride resin. The compatibility of the two materials is impaired, and mutual separation occurs, making it impossible to knead or mold.
有機錫化合物はスタンパ成形時の熱安定性ならびに流動
性を句与するために添加するもので、液状のものが使用
される。The organic tin compound is added to impart thermal stability and fluidity during stamper molding, and a liquid type is used.
有機錫化合物は塩化ビニル系樹脂からブルームしがたく
、またブルームしても液状であって音溝とピックアツプ
針との接触を妨害しない。The organic tin compound does not easily bloom from the vinyl chloride resin, and even if it blooms, it remains in liquid form and does not interfere with the contact between the sound groove and the pickup needle.
具体例としてはジブチルチンジラウレート、ジブデルチ
ンシマレート、ジブチルチンメルカプチド、ジブチルチ
ンジステアレートなどがあり、これらは塩化ビニル系樹
脂１００重量部に対して０．１〜３重量部の範囲で添加
することが好ましい。Specific examples include dibutyltin dilaurate, dibdeltin simalate, dibutyltin mercaptide, and dibutyltin distearate, which are added in an amount of 0.1 to 3 parts by weight per 100 parts by weight of vinyl chloride resin. It is preferable to do so.
なお、本発明においては上記有機錫化合物と共にエポキ
シ系安定剤を併用することも可能である。In addition, in the present invention, it is also possible to use an epoxy stabilizer together with the above-mentioned organotin compound.
本発明においては、上記各種成分に加えて多官能七ツマ
を添加し、成形体を電離性放射線で照射架橋する際の架
橋反応性を高めている。In the present invention, in addition to the above-mentioned various components, a polyfunctional nitride is added to enhance the crosslinking reactivity when the molded article is irradiated and crosslinked with ionizing radiation.
多官能七ツマとしては、エチレングリコールジメタクリ
レート、トリエチレン−グリコールジメタクリレート、
テトラエチレングリコールジメタクリレート、ポリエチ
レングリコールジメタクリレ−１−１１・３−ブヂレン
グリコールジメタクリレート、トリメチロールプロパン
トリメタクリレート、テトラメチロールメタンテトラア
クリレ−１へ、ジアリルフマレート、ジアリルフタレー
ト、テトラアリルオキシエタン、トリアリルシアヌレー
ト等があり、使用に当っては照射後の表面硬度に従って
適当量を配合すればよい。Examples of polyfunctional methacrylate include ethylene glycol dimethacrylate, triethylene glycol dimethacrylate,
Tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate-1-11,3-butylene glycol dimethacrylate, trimethylolpropane trimethacrylate, tetramethylolmethane tetraacrylate-1, diallyl fumarate, diallyl phthalate, tetraallyl Oxyethane, triallyl cyanurate, etc. are available, and when used, an appropriate amount may be blended according to the surface hardness after irradiation.
塩化ビニル系樹脂、ポリオレフィン樹脂、有機錫化合物
を含む混合物に多官能モノマを添加してなるコンパウン
ドはスタンパ成形により所定形状に成形され、その後電
離性放射線の照射により架橋され、表面硬度の高いレコ
ードディスクが得られることになる。A compound made by adding a polyfunctional monomer to a mixture containing a vinyl chloride resin, a polyolefin resin, and an organic tin compound is molded into a predetermined shape by stamper molding, and then crosslinked by irradiation with ionizing radiation to produce a record disc with high surface hardness. will be obtained.
電離性放射線としてはα線、β線、γ線、電子線などが
あり、照射線量は１〜２０Ｍｒａｄ、好ましくは２〜１
０Ｍｒａｄである。Ionizing radiation includes α rays, β rays, γ rays, electron beams, etc., and the irradiation dose is 1 to 20 Mrad, preferably 2 to 1
It is 0 Mrad.
以下、本発明の実施例について説明する。Examples of the present invention will be described below.
実施例
・塩化ビニル−酢酸ビニル共重合樹脂
（酢酸ビニルｍ１ｏ＊量％、平均重合度４５ｏ）１００
重量部
・ポリエチレン（メルトインデックス２．０）３重量部
・ジブチルチンメルカプチド １重量部・エピ
コート８２８（シェル社製） ３重用部・ファーネス
ブラック １重量部・ノニ７ｊン系界面
活性剤（油状） ０．１重量部上記成分を均一に混合し
た混合物１００千Ｂ１部に対してトリメチロールプロパ
ントリメタクリレートを１０重量部添加してコンパウン
ドを得、スタンパ成形してから５ Ｍ ｒａｄの電子線
を照射してＬＰレコードディスクを得た。Example - Vinyl chloride-vinyl acetate copolymer resin (vinyl acetate m1o*% by weight, average degree of polymerization 45o) 100
Parts by weight: 3 parts by weight of polyethylene (melt index 2.0) 1 part by weight of dibutyltin mercaptide 3 parts by weight of Epicoat 828 (manufactured by Shell) 1 part by weight of Furnace Black ・Noni 7J surfactant (oil) 0.1 part by weight 10 parts by weight of trimethylolpropane trimethacrylate was added to 1 part by weight of a mixture of 100,000 B in which the above components were uniformly mixed, and the compound was molded with a stamper and then irradiated with an electron beam of 5 M rad. I got an LP record disc.
得られたレコードをピックアップ剣の針圧を４９にして
同一曲目を２５回繰返し演奏した。The same song was played 25 times on the obtained record with the stylus pressure of the pickup sword set to 49.
主観的測定において極めて良好な音質が得られ、また音
質の変化は殆んど認められず、しかもピックアツプ針へ
の耐着異物は目視では全く認められなかった。Extremely good sound quality was obtained in subjective measurements, and almost no change in sound quality was observed, and no foreign matter adhering to the pickup needle was visually observed.
これに対し、スタンパ成形後架橋しないレコードを上記
と同様に針圧を４９にして演奏したところ、当初は良好
な音質であったが、徐々に音質の劣化が認められた。ピ
ックアツプ針には異物の刊着があったのでレコードが摩
耗していることが確認された。On the other hand, when a record that was not crosslinked after stamper molding was played at a stylus force of 49 in the same manner as above, the sound quality was initially good, but the sound quality gradually deteriorated. It was confirmed that the record was worn out because there was foreign matter stuck to the pick-up needle.
また、従来のステアリン酸石鹸を配合したレコードでは
、ピックアツプ針に白色のロウ状附着物が認められ、回
数を重ねるに従って音質が劣化した。In addition, with conventional records containing stearic acid soap, white waxy deposits were observed on the pickup needle, and the sound quality deteriorated as the number of times the drum was used increased.
以上説明してきた通り、本発明によれば表面硬度の高い
レコードディスクが得られ、針圧を高めることにより針
と音溝との接触を確実にすることができ、またレコード
ディスク表面への添加剤のブルーム防止と相俟って極め
Ｃ高い音光）再生が可能となる。As explained above, according to the present invention, a record disc with high surface hardness can be obtained, contact between the stylus and the sound groove can be ensured by increasing the stylus pressure, and additives to the surface of the record disc can be obtained. Together with the prevention of bloom, it becomes possible to reproduce extremely high C sound and light.
−１６ヒ-16hi
Claims (1)
重量部に対してポリオレフィン樹脂０．１〜５重量部を
主体として含有し、これに有機錫化合物および多官能モ
ノマを添加してなる塩化ビニル系樹脂コンパウンドをス
タンパ成形し、しかる後電離性放射線を照射して架橋せ
しめることを特徴とするレコードディスクの製造方法。Vinyl chloride resin 100 with an average degree of polymerization of 400 to 800
A vinyl chloride resin compound containing mainly 0.1 to 5 parts by weight of a polyolefin resin and to which an organic tin compound and a polyfunctional monomer are added is molded with a stamper, and then exposed to ionizing radiation. A method for producing a record disc, characterized by crosslinking by irradiation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58061133A JPS59185631A (en) | 1983-04-07 | 1983-04-07 | Manufacture of record disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58061133A JPS59185631A (en) | 1983-04-07 | 1983-04-07 | Manufacture of record disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59185631A true JPS59185631A (en) | 1984-10-22 |
| JPS645812B2 JPS645812B2 (en) | 1989-02-01 |
Family
ID=13162270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58061133A Granted JPS59185631A (en) | 1983-04-07 | 1983-04-07 | Manufacture of record disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59185631A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61181852A (en) * | 1985-02-06 | 1986-08-14 | Shin Etsu Chem Co Ltd | Vinyl chloride resin composition for floppy disk jacket |
| JPH04122075U (en) * | 1991-04-22 | 1992-10-30 | 株式会社ヱフエス企画 | Copy delivery slip |
| JP2020046322A (en) * | 2018-09-19 | 2020-03-26 | 多摩川精機株式会社 | Sound piece array structure for ae sensor, ae sensor, and method for manufacturing the same |
-
1983
- 1983-04-07 JP JP58061133A patent/JPS59185631A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61181852A (en) * | 1985-02-06 | 1986-08-14 | Shin Etsu Chem Co Ltd | Vinyl chloride resin composition for floppy disk jacket |
| JPH04122075U (en) * | 1991-04-22 | 1992-10-30 | 株式会社ヱフエス企画 | Copy delivery slip |
| JP2020046322A (en) * | 2018-09-19 | 2020-03-26 | 多摩川精機株式会社 | Sound piece array structure for ae sensor, ae sensor, and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS645812B2 (en) | 1989-02-01 |
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