JPH0330217B2 - - Google Patents
Info
- Publication number
- JPH0330217B2 JPH0330217B2 JP62124864A JP12486487A JPH0330217B2 JP H0330217 B2 JPH0330217 B2 JP H0330217B2 JP 62124864 A JP62124864 A JP 62124864A JP 12486487 A JP12486487 A JP 12486487A JP H0330217 B2 JPH0330217 B2 JP H0330217B2
- Authority
- JP
- Japan
- Prior art keywords
- protective layer
- disc
- base
- recording layer
- disk base
- 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.)
- Expired - Lifetime
Links
- 239000011241 protective layer Substances 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 10
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- -1 vinyl compound Chemical class 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明は光学式デイスクレコードの改良構造に
関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improved structure of an optical disc record.
(ロ) 従来の技術
光学式のレコードプレーヤにおいてレーザビー
ムをデイスクレコードに照射する場合、デイスク
基台を通して照射するものと、記録層の表面に形
成した保護層を介して照射するものとがあるが、
前者のものの方が表面状態の変化による影響を受
け難い利点があるとされている。(b) Prior art When a disc record is irradiated with a laser beam in an optical record player, there are two methods: one is to irradiate the laser beam through the disc base, and the other is to irradiate it through a protective layer formed on the surface of the recording layer. ,
The former type is said to have the advantage of being less affected by changes in surface conditions.
例えば特公昭52−32931号公報（H04N ５／
84）には、透明のデイスク基台の記録層側に記録
層を保護する第１の保護層を形成し、記録層側と
は反対の面よりレーザビームを照射せしめるビデ
オデイスクレコードが開示されている。 For example, Japanese Patent Publication No. 52-32931 (H04N 5/
84) discloses a video disc record in which a first protective layer for protecting the recording layer is formed on the recording layer side of a transparent disc base, and a laser beam is irradiated from the side opposite to the recording layer side. There is.
(ハ) 発明が解決しようとする問題点
しかし、この様な構成のデイスクレコードであ
つてもデイスク基台の表面状態の影響は無視でき
ず、たとえば50μm以上のクラツチ等が生じると
信号のＳ／Ｎ比に大きな影響を与える。これを防
止するには基台表面の耐摩耗性を向上させなけれ
ばならない。一方、デイスク基台は気象変化並び
にゴミ等の付着等による環境変化に基づきその表
面が曇る傾向があるが、それに対して従来はその
曇りをその都度払拭する方法を採つていた。これ
では、その払拭作業時に基台表面を傷付けるおそ
れがあるし、その作業自体が煩瑣に絶えない。(c) Problems to be solved by the invention However, even with a disc record having such a configuration, the influence of the surface condition of the disc base cannot be ignored. For example, if a clutch of 50 μm or more occurs, the signal S/ This has a large effect on the N ratio. To prevent this, the wear resistance of the base surface must be improved. On the other hand, the surface of the disk base tends to become cloudy due to environmental changes such as weather changes and adhesion of dust, etc., but in the past, a method has been adopted to deal with this problem by wiping away the cloudiness each time. In this case, there is a risk of damaging the base surface during the wiping operation, and the operation itself is cumbersome.
また、前述するデイスクレコードの場合、一方
のみ保護層が形成されるためデイスクレコードの
強度にアンバランスを生じてデイスクレコードに
反りを生じせしめる惧れもあつた。 Further, in the case of the above-mentioned disc record, since the protective layer is formed only on one side, there is a risk that the strength of the disc record will be unbalanced and the disc record will warp.
(ニ) 問題点を解決するための手段
そこで、本発明はデイスク基台の他面側（記録
層とは反対側の面に耐摩耗性に関して前記デイス
ク基台に比して秀れた第２の保護層を形成するこ
とを特徴とする。(d) Means for Solving the Problems Therefore, the present invention provides a second surface of the disk base (the surface opposite to the recording layer) which is superior in abrasion resistance compared to the disk base. It is characterized by forming a protective layer.
(ホ) 作用
よつて、本発明によれば、デイスク基台の両面
が保護層によつて保護される。(E) Effect Therefore, according to the present invention, both sides of the disk base are protected by the protective layer.
(ヘ) 実施例
以下、本発明を図示せる実施例に従い説明す
る。(f) Examples The present invention will be described below with reference to illustrative examples.
図は本発明の１実施例の断面図を示したもので
ある。１は透明なデイスク基台であり、それは塩
化ビニールにて成型されその厚みは約１mmであ
る。このデイスク基台の１面には周知の方法によ
つて信号記録層２が形成され、更にこの記録層を
保護する為の第１の保護層３が形成されている。
一方このデイスク基台の他面には、該基台の素材
である塩化ビニールに比し、防曇性及び耐摩耗性
の項目において秀れた第２の保護層４を形成す
る。この保護層は、たとえば樹脂状シリコンを有
機溶媒で溶かしたものに硬質塩化ビニールを重量
比で約30％混合してなる溶液を前記デイスク基台
に約100μmの層厚となるように塗布して構成され
る。この保護層はその表面の硬度が鉛筆硬度で
3H程度であり、またその防曇性はこの保護層を
沸騰する水蒸気にあてがつてもその付着が認めら
れないものであつた。 The figure shows a cross-sectional view of one embodiment of the present invention. 1 is a transparent disk base, which is molded from vinyl chloride and has a thickness of about 1 mm. A signal recording layer 2 is formed on one side of the disk base by a well-known method, and a first protective layer 3 for protecting this recording layer is further formed.
On the other hand, a second protective layer 4 is formed on the other surface of the disk base, which is superior in terms of antifogging and abrasion resistance compared to vinyl chloride, which is the material of the base. This protective layer is made by applying a solution of about 30% by weight of hard vinyl chloride to resinous silicone dissolved in an organic solvent to a thickness of about 100 μm on the disk base. configured. This protective layer has a surface hardness on a pencil scale.
3H, and its antifogging properties were such that no adhesion was observed even when the protective layer was exposed to boiling water vapor.
(ト) 発明の効果
叙上の如く本実施例はレーザビームの出入する
デイスク基台の表面に防曇性と耐摩耗性の両性質
を兼ねた保護層、特にシリコン化合物とビニール
化合物の混合樹脂からなる保護層を構成したの
で、防曇性及び耐摩耗性に秀れたデイスクレコー
ドを得ることができ実用的である。(g) Effects of the invention As described above, this embodiment uses a protective layer having both anti-fog and wear-resistant properties on the surface of the disk base through which the laser beam enters and exits, especially a mixed resin of a silicon compound and a vinyl compound. Since the protective layer is composed of the following, it is possible to obtain a disc record having excellent antifogging properties and abrasion resistance, which is practical.
また、本実施例では第２の保護層が耐摩耗性を
有すると共に十分な強度を有しており、第１の保
護層形成に伴う反りを軽減又は防止する効果もあ
る。 Furthermore, in this example, the second protective layer has abrasion resistance and sufficient strength, and has the effect of reducing or preventing warping caused by the formation of the first protective layer.
図は本発明の一実施例を示す断面図である。
１…デイスク基台、２…信号記録層、３…第１
の保護層、４…第２の保護層。
The figure is a sectional view showing one embodiment of the present invention. 1...Disk base, 2...Signal recording layer, 3...First
4...Second protective layer.
Claims (1)
け、該信号記録層上に第１の保護層を形成するデ
イスクレコードに於て、 前記デイスク基台の他面に払拭に対する耐摩耗
性に関して前記デイスク基台に比して秀れた第２
の保護層を形成して成るデイスクレコードの構
造。[Claims] 1. In a disc record in which a signal recording layer is provided on one surface of a transparent disc base and a first protective layer is formed on the signal recording layer, the other surface of the disc base is wiped. The second disc has superior wear resistance compared to the disc base.
The structure of a disc record that forms a protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62124864A JPS6323236A (en) | 1987-05-21 | 1987-05-21 | Structure of disk record |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62124864A JPS6323236A (en) | 1987-05-21 | 1987-05-21 | Structure of disk record |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6323236A JPS6323236A (en) | 1988-01-30 |
| JPH0330217B2 true JPH0330217B2 (en) | 1991-04-26 |
Family
ID=14895986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62124864A Granted JPS6323236A (en) | 1987-05-21 | 1987-05-21 | Structure of disk record |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6323236A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52156605A (en) * | 1976-06-18 | 1977-12-27 | Thomson Brandt | Data carrier and method of producing same |
| JPS5724042A (en) * | 1980-07-18 | 1982-02-08 | Sony Corp | Optical information recording medium and its production |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037700Y2 (en) * | 1978-06-07 | 1985-11-11 | 三洋電機株式会社 | Structure of disk record |
-
1987
- 1987-05-21 JP JP62124864A patent/JPS6323236A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52156605A (en) * | 1976-06-18 | 1977-12-27 | Thomson Brandt | Data carrier and method of producing same |
| JPS5724042A (en) * | 1980-07-18 | 1982-02-08 | Sony Corp | Optical information recording medium and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6323236A (en) | 1988-01-30 |
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