JPS59112450A - Conductive disc type recording medium - Google Patents

Conductive disc type recording medium

Info

Publication number
JPS59112450A
JPS59112450A JP22235582A JP22235582A JPS59112450A JP S59112450 A JPS59112450 A JP S59112450A JP 22235582 A JP22235582 A JP 22235582A JP 22235582 A JP22235582 A JP 22235582A JP S59112450 A JPS59112450 A JP S59112450A
Authority
JP
Japan
Prior art keywords
modified silicone
wear resistance
conductive
thermoplastic resin
parts
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
Application number
JP22235582A
Other languages
Japanese (ja)
Other versions
JPS647409B2 (en
Inventor
Hideo Hatanaka
畠中 秀夫
Yutaka Nishimura
豊 西村
Akihiro Okuma
大熊 昭弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP22235582A priority Critical patent/JPS59112450A/en
Publication of JPS59112450A publication Critical patent/JPS59112450A/en
Publication of JPS647409B2 publication Critical patent/JPS647409B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • G11B9/061Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B9/063Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers characterised by the selection of the material
    • G11B9/068Moulding resin compositions

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To improve wear resistance of a titled medium and the wear resistance of a reproducing stylus by the constitution wherein conductive carbon black particles are added to a thermoplastic resin contg. a PVC resin and an alkyl aralkyl modified silicone at a specific weight ratio. CONSTITUTION:A conductive disc type magnetic recording medium formed with the pits conforming to information signals apart from each other at prescribed intervals in a spiral shape or on a concentrical circle is constituted by using at least a thermoplastic resin and conductive carbon black particles. The thermoplastic resin contains a PVC resin and the alkyl aralkyl modified silicone expressed by the general formula I and the components thereof are constituted at such ratios at which the alkyl aralkyl modified silicone is incorporated at 0.6-1.2pts.wt. in 100pts.wt. the PVC. The conductive disc type recording medium having excellent wear resistance and particularly the remarkably improved wear resistance of a reproducing stylus is thus produced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、その表面に情報信号と対応するピット(くぼ
み)が渦巻状あるいは同心円状に所定の間隔を隔てて形
成されている導電性ディスク盤で、再生原理がピ・ノド
の有無ないしピ・ト間の長すノ長短により、側面に導電
層の形成された再生針と前記導電性ディスク盤との間で
得られる静電容量の変動全情報信号として取り出すこと
のできる、一般に静電容量方式と称せられている導電性
ディスク型記録担体に関するものである。
[Detailed Description of the Invention] Industrial Application Field The present invention relates to a conductive disk disk, on the surface of which pits corresponding to information signals are formed at predetermined intervals in a spiral or concentric manner. The reproduction principle is based on the presence or absence of pi/nod or the length of the pi/to gap, and all the information on the fluctuation of capacitance obtained between the reproduction needle with a conductive layer formed on the side surface and the conductive disk. The present invention relates to a conductive disk type record carrier, generally referred to as a capacitive type, which can be extracted as a signal.

従来例の構成とその問題点 近年、この種の静電容量方式で再生が可能な導電性ディ
スク型記録担体としては、CED方式のビデオディスク
(再生針の誘導溝有り;米国RCA社)、VHD方式の
ビデオディスク(再生針の誘導溝無し;日本ビクター(
株))、AHD方式のデジタルオーディオディスク(再
生針の誘導溝無し3、−。
Conventional Structures and Problems In recent years, as conductive disk type record carriers that can be reproduced using this type of capacitance method, CED type video disks (with guide grooves for playback needles; RCA Corporation, USA), VHD system video disc (no guiding groove for the playback needle; Japan Victor (
Ltd.), AHD format digital audio disc (no guide groove for playback needle 3,-).

;日本ビクター(株))が発表ないし、市販されている
; Japan Victor Co., Ltd.) has not announced or is commercially available.

前記いずれの方式においても、その材料組成物は全く同
じものが使用可能で、製造法においても同じことが言え
る。従−て本発明はどの方式にも有効であることは勿論
である。
In any of the above methods, the same material composition can be used, and the same can be said for the manufacturing method. Therefore, it goes without saying that the present invention is effective in any system.

以下、導電性ディスク型記録担体の従来例とその問題点
について述べる。
Hereinafter, conventional examples of conductive disk type record carriers and their problems will be described.

従来、レコード工業の分野では、ディスクを得るために
、たとえば表面に情報信号の施されたスタノパーを用い
て、主として塩化ビニル系樹脂とその他の添加剤より成
る組成物を圧縮成型してディスレコードを製作している
Conventionally, in the field of the record industry, in order to obtain a disc, for example, a stanopaer whose surface is coated with information signals is used to compression mold a composition mainly consisting of vinyl chloride resin and other additives. It is being produced.

一方、静電容量式導電性ディスク型記録担体の製法にお
いても、従来のオーディオレコード盤と共通した混線術
術、成型技術を使用できること、ディスク材として適度
の可とう性や耐摩耗性が要求されることなどから、ディ
スク成型用樹脂材料としては、塩化ビニル系樹脂材料が
使用されている0 しかし、このような導電性ディスク型記録担体において
は、ディスクからの静電容量的読み取りを可能にするに
充分な計の導電性粒子を混入しなければならない。導電
性粒子としては、加工性。
On the other hand, the manufacturing method for capacitive conductive disk-type record carriers requires that the same cross-wire technique and molding technology as used for conventional audio records can be used, and that the disk material has appropriate flexibility and abrasion resistance. For this reason, vinyl chloride-based resin materials are used as resin materials for disc molding.0 However, in such conductive disc-type record carriers, capacitance reading from the disc is possible. A sufficient amount of conductive particles must be mixed into the sample. As a conductive particle, it is easy to process.

分散性、安定性2価格等から導電性カーボンブラックの
使用が好ましく、その添加計はディスクの体積固有抵抗
が500Ω・m未満、好捷しくは数10Ω・閤以下にな
る量が必要とされる。さらに、従来のオーディオレコー
ド材に比べて異なる点は、約1ミクロン径の信号(ピッ
ト)全忠実にプレス複製しなけ:ILげならないために
、多量のカーボッブラックの混入にもかかわらず、脆く
なく組成物の溶融流動性も適当でなければならないこと
、スタンバ−全汚染することなく連続的にプレスが可能
なこと、ディスク再生時にディスクと再生針の間に生じ
る動的摩擦によるディスクや再生針の摩耗、損傷が少な
いことなど、従来レコード以上の品質要求が成されてい
る。
It is preferable to use conductive carbon black from the viewpoint of dispersibility, stability, price, etc., and the amount added is required to make the volume resistivity of the disk less than 500 Ω·m, preferably less than several tens of Ω·m. . Furthermore, the difference from conventional audio record materials is that the signals (pits) with a diameter of about 1 micron must be faithfully reproduced by press. The melt fluidity of the composition must also be appropriate, the stambar must be able to be pressed continuously without contaminating the entire disc, and the dynamic friction that occurs between the disc and the recycler needle during disc playback causes damage to the disc and the recycler needle. Quality requirements are higher than for conventional records, such as less wear and damage.

これらの品質要求を満足するために、ディスク材料とし
ての樹脂材料には多くの提案が成されて5 ・・−ソ おり、たとえば樹脂材料としては前記の塩化ビニル系樹
脂材料として、ストレート塩化ビニル樹脂と塩素化ポリ
エチレノ樹脂との混合物、塩化ビニルとエチレン、プロ
ピレンなどのオレフィンとの共重合樹脂、エチレン・酢
ビ共重合体に塩化ビニルをグラフト重合したものなどが
知られている。
In order to satisfy these quality requirements, many proposals have been made for resin materials as disc materials5. Mixtures of vinyl chloride and chlorinated polyethylene resin, copolymer resins of vinyl chloride and olefins such as ethylene and propylene, and graft polymerization of vinyl chloride to ethylene/vinyl acetate copolymers are known.

また導電性カーボンブラックとしては、樹脂材料との混
線性が良くかつ電気抵抗の低いものが用いられる。樹脂
材料として塩化ビニル系樹脂を用いる場合には、混線、
押出、成型時の樹脂材料の熱分解を防ぐために熱安定剤
が用いられる。さらに樹脂材料の溶融粘度を下げ、成型
性を改良するために滑剤(加工助剤)が使用される。さ
らに樹脂材料の混線、成型時の混線機、押出機内壁への
粘着性を減じ、プレス機における型離れを改良し。
Further, as the conductive carbon black, one that has good cross-talkability with the resin material and low electrical resistance is used. When using vinyl chloride resin as the resin material, crosstalk,
Heat stabilizers are used to prevent thermal decomposition of resin materials during extrusion and molding. Furthermore, a lubricant (processing aid) is used to lower the melt viscosity of the resin material and improve moldability. Furthermore, it reduces cross-contact of resin materials, cross-contact machines during molding, and adhesion to the inner wall of the extruder, and improves mold release in press machines.

ディスクと再生針の間に生じる動的摩擦を低下させてデ
ィスクや再生針の摩耗、損傷を防ぐために潤滑剤が使用
される。
A lubricant is used to reduce the dynamic friction that occurs between the disk and the playback needle, thereby preventing wear and damage to the disk and playback needle.

これらのうち、本発明の対象となる導電性ディス型記録
担体においては、潤滑剤の選択は極めて6 、、−、、
、− 重要である。何故ならば、ディスク再生時のディスクと
再生針との相対速度差が極めて大きい(ディスク回転数
はCHD方式で毎分460回転、VHD方式で毎分9o
○回転)ことや、スチル再生、スロー再生、高速再生、
ランダムアクセス再生などのトリックプレイが要求され
ることから、ディスクおよび再生針の耐摩耗性を考慮し
た場合極めて不利な条件になっているからである。
Among these, in the conductive disk type recording carrier that is the object of the present invention, the lubricant is extremely selected.
, - important. This is because the relative speed difference between the disc and the playback stylus during disc playback is extremely large (the disc rotation speed is 460 revolutions per minute in the CHD system and 9 rotations per minute in the VHD system).
○Rotation), still playback, slow playback, fast playback,
This is because trick play such as random access playback is required, which is an extremely disadvantageous condition when considering the wear resistance of the disc and the playback stylus.

一般に、潤滑剤としては無機材料系と有機材料系が知ら
れており、無機材料系ではグラファイト二硫化モリブデ
ンなどがあり、有機材料系では高級脂肪酸、高級脂肪酸
塩、高級脂肪酸エステル、パラフィン系炭化水素化合物
、シリコーン油(たとえばジメチルポリシロキサン、メ
チルフェニルポリシロキサンなど)が知られている。デ
ィスク材料における滑剤の選択は、分散性、熱安定性。
In general, lubricants are known to be based on inorganic materials or organic materials. Inorganic materials include graphite molybdenum disulfide, etc., while organic materials include higher fatty acids, higher fatty acid salts, higher fatty acid esters, and paraffinic hydrocarbons. compounds, silicone oils (eg dimethylpolysiloxane, methylphenylpolysiloxane, etc.) are known. The selection of lubricants in disc materials should be based on their dispersibility and thermal stability.

実際の添加効果などからジメチルポリシロキサンやメチ
ルフェニルポリシロキサ7などのシリコーン油が用いら
れていた。これにより、ディスクの耐摩耗性はかなり向
上したが、再生針の耐魔耗性ア・−7 ばそ八はど白土が認められず、再生針の摩耗量を低下さ
せる効果も十分に有する潤滑剤が強く望捷れていた。
Silicone oils such as dimethylpolysiloxane and methylphenylpolysiloxane 7 have been used due to their practical effects. As a result, the wear resistance of the disc has improved considerably, but the wear resistance of the recycled stylus has not been confirmed. The drug was strong and arousing.

発明の目的 本発明の目的は、耐摩耗性に優れ、かつ再生針の耐摩耗
性を著しく向」ニさせた導電性ディスク型記録担体を提
供することにある。
OBJECTS OF THE INVENTION An object of the present invention is to provide a conductive disk-type record carrier that has excellent abrasion resistance and has significantly improved abrasion resistance of a reproducing needle.

発明の構成 本発明の導電性ディスク型記録担体け、少なくとも熱可
塑性樹脂と導電性カーボッブラック粒子を用いて構成さ
れ、情報信号と対応するピントが渦巻状あるいは同心円
上に所定の間隔を隔て形成されると共に、前記熱可塑性
樹脂が塩化ビニル系樹脂と、一般式 で示されるアルキルアラルキル変性シリコーンを含み、
その成分構成比が塩化ビニル系100重量部に対し、ア
ルキルアラルキル変性シリコーンがq6〜1.2重量部
であることを特徴とするものであり、これにより、得ら
れる導電性ディスク型記録担体の耐摩耗性が良好で、か
つ再生針の摩耗性も著しく低減することができる。
Structure of the Invention The conductive disk-type recording carrier of the present invention is constructed using at least a thermoplastic resin and conductive carbon black particles, and focuses corresponding to information signals are formed at predetermined intervals in a spiral shape or on concentric circles. and the thermoplastic resin includes a vinyl chloride resin and an alkylaralkyl-modified silicone represented by the general formula,
The component composition ratio is q6 to 1.2 parts by weight of the alkylaralkyl-modified silicone to 100 parts by weight of the vinyl chloride system. The abrasion properties are good, and the abrasion properties of recycled needles can be significantly reduced.

一般式(I)に示される側鎖にアルキル、アラルキル基
を有する変性シリコーン全塩化ビニル系樹脂に配合して
成るディスクがディスクおよび再生針に対して極めて良
好な耐久性を有する理由を考察するに、ジメチルポリシ
ロキサンまたはメチルフェニルポリシロキサンとして代
表されるシリコーン油に比し、本発明に用いる一般式(
I)に示されるアルギルアラルキル変性シリコ−yrd
、R,R’の炭素数がそれぞれ2〜15.2〜4のもの
であり ・、−/゛ れは塩化ビニル系樹脂に対して比較的良好な相溶性を有
し、かつ重合度を示す数字であるx+yが30〜7oの
ものであればディスク使用中において適当な表面へのブ
リードがあること、更に構造の一部にフェニル基が導入
されていることがらジメチルシリコーン油に比して更に
耐熱性面でも有利になっていることなどから、潤滑剤と
しての効果、すなわち初期特性、耐久特性、環境テスト
特性に対する効果が大きいものと考えられる。
Let us consider the reason why a disc made of a modified silicone all-vinyl chloride resin having an alkyl or aralkyl group in the side chain represented by the general formula (I) has extremely good durability against discs and playback needles. , dimethylpolysiloxane or methylphenylpolysiloxane, the general formula (
Argylaralkyl-modified silico-yrd shown in I)
, R, and R' each have 2 to 15.2 to 4 carbon atoms, and -/゛ has relatively good compatibility with vinyl chloride resin and indicates the degree of polymerization. If the number x + y is 30 to 7o, it means that there will be some bleeding to the surface during use of the disc, and furthermore, a phenyl group has been introduced into a part of the structure, so it is more effective than dimethyl silicone oil. Since it is also advantageous in terms of heat resistance, it is considered to have a large effect as a lubricant, that is, on initial characteristics, durability characteristics, and environmental test characteristics.

実施例の説明 以下、本考案を実施例によ−て具体的に説明する。なお
、以下の実施例に述べる部数は全て重量部を示1−でい
る。
DESCRIPTION OF EXAMPLES Hereinafter, the present invention will be specifically explained using examples. Note that all parts mentioned in the following examples indicate parts by weight.

実施例1 塩化ビニル系樹脂(ストレート塩化ビニル樹脂平均重合
度450)・・・・・100部塩素化ポリエチレン(昭
和電圧(株)製、エラスレン301A;塩素含有率30
%)゛°゛4部41部外1f性カーボンブラツクキャボ
、ト社製O3x 150A−3,D B P吸油量約3
20cc/10  、、 ;− 100g、甲均粒径16〜181rm、見掛比重約o、
13)  ・20部 熱安定剤人(日東化成工業(株)製、N2000に;有
機錫系液状安定剤) 熱安定剤B(日東化成工業(株)製、MA300A;ジ
プチル錫マレート)・・・・2部 i剤A(ヘンケル日水(株)製、ロキシオールG” ;
脂肪族アルコールの二酸基酸エステル。
Example 1 Vinyl chloride resin (straight vinyl chloride resin average degree of polymerization 450)...100 parts Chlorinated polyethylene (manufactured by Showa Voltage Co., Ltd., Elasrene 301A; chlorine content 30
%)゛°゛4 parts 41 parts 1f carbon black carburetor, O3x 150A-3, D B P oil absorption amount approx. 3
20cc/10, ;-100g, average grain size 16-181rm, apparent specific gravity approximately o,
13) ・20 parts heat stabilizer (manufactured by Nitto Kasei Kogyo Co., Ltd., N2000; organic tin-based liquid stabilizer) Heat stabilizer B (manufactured by Nitto Kasei Kogyo Co., Ltd., MA300A; diptyltin malate)...・2-part I agent A (manufactured by Henkel Nissui Co., Ltd., Roxiol G";
Diacid acid ester of aliphatic alcohol.

融点42〜46℃戸・・・・2.0部 滑剤B(ヘンケル日水(株)製、ロキシオールG−70
;高分子エステルワックス、融点50〜62℃)・・・
・0.4部 潤滑油(東しシリコーノ■)製、5H−203;ftt
 式(I)で示されるアルキルアラルキル変性シリコー
ン油、粘度1200cps、比重o91.屈折率1.4
64 )  ・0.7部 以上の組成から成る′混合物を高速攪拌機で充分攪拌し
た後、混線機で加熱溶融混線を行ない、次いで押出し圧
縮成型することにより試料ディスクを作製した。
Melting point: 42-46°C...2.0 parts Lubricant B (manufactured by Henkel Nissui Co., Ltd., Roxiol G-70)
; Polymer ester wax, melting point 50-62°C)...
・0.4 part lubricating oil (Toshi Silicono■), 5H-203; ftt
Alkylaralkyl-modified silicone oil represented by formula (I), viscosity 1200 cps, specific gravity 091. Refractive index 1.4
64) - A sample disk was prepared by sufficiently stirring a mixture consisting of 0.7 parts or more using a high-speed stirrer, heating and melting the mixer using a mixer, and then extruding and compression molding.

11べZ 実施例2〜4 実施例1において、潤滑油としてアルキルアラルキル変
性シリコーン油、5H203の添加量を0.6部(実施
例2)、0.9部(実施例3)、1.2部(実施例4)
とした他は、実施例1と全く同様にして試料を作製した
11beZ Examples 2 to 4 In Example 1, the amount of alkylaralkyl-modified silicone oil, 5H203, added as a lubricating oil was 0.6 parts (Example 2), 0.9 parts (Example 3), and 1.2 parts. Section (Example 4)
A sample was prepared in the same manner as in Example 1 except for the following.

比較例1 実施例1において、潤滑油としてアルキルアラルキル変
性シリコーン油の代りに、ジメチルシリコーン油(束レ
シリコ−7(株)製、5H200;粘度50cps )
 を用い、添加量を97部とした他は、実施例1と全く
同様にして試料を作製した。
Comparative Example 1 In Example 1, dimethyl silicone oil (manufactured by Tsukushi Resilico-7 Co., Ltd., 5H200; viscosity 50 cps) was used instead of the alkylaralkyl-modified silicone oil as the lubricating oil.
A sample was prepared in exactly the same manner as in Example 1, except that the amount added was 97 parts.

比較例2 実施例1において、潤滑油としてアルキルアラルキル変
性シリコーン油の代りに、フェニル変性シリコーン油(
東しシリコーン(株)g、5H550;メチルフェニル
変性シリコーン油、粘度130cps)を用い、添加量
を0.7部とした他は、実施例1と全く同様にして試料
全作製した。
Comparative Example 2 In Example 1, phenyl-modified silicone oil (
All samples were prepared in the same manner as in Example 1, except that Toshi Silicone Co., Ltd. g, 5H550; methylphenyl-modified silicone oil, viscosity 130 cps) was used and the amount added was 0.7 parts.

比較例3〜5 実施例1において、潤滑油としてアルキルアラルキル変
性シリコーン油、5H203の添加量iを0部(比較例
3)、0.3部(比較例4)、1.5部(比較例5)と
した他は、実施例1と全ぐ同様1/i1mして試料全作
製した。
Comparative Examples 3 to 5 In Example 1, the addition amount i of alkylaralkyl-modified silicone oil, 5H203, as a lubricating oil was 0 parts (Comparative Example 3), 0.3 parts (Comparative Example 4), and 1.5 parts (Comparative Example). 5), all samples were prepared in the same manner as in Example 1 at 1/i1 m.

以上の実施例および比較例で得られた試別について、成
型性5両生画質、ディスクおよび再生針の摩耗性を調べ
た。それらの結果を次表に示す。
The samples obtained in the above Examples and Comparative Examples were examined for moldability, image quality, and abrasion resistance of disks and reproduction needles. The results are shown in the table below.

なお、試料の体積固有抵抗値は、いずれも8〜12Ω・
mであった。
In addition, the volume resistivity values of the samples are all 8 to 12Ω・
It was m.

(ふj・1全6) 14べS゛ 上記表において、 (1)シリコーン油添加量は、塩化ビニル系樹脂100
重量部に対するシリコーン油の添加重量部数を示す。
(Fuj.1 total 6) 14beS゛In the above table, (1) The amount of silicone oil added is 100% of the vinyl chloride resin.
The number of parts by weight of silicone oil added to parts by weight is shown.

(2)成型性は、所定組成のディスク材刺混線物の加熱
圧縮成型時のスタノパ、ディスク表面の汚れ性やディス
クの反りの有機等により評価全行な−た。
(2) The moldability was evaluated using the stanopa during heat compression molding of a disk material with a predetermined composition, stain resistance on the surface of the disk, organic matter of disk warpage, etc.

(3)ディスクの耐摩耗性は、所定組成の試料ディスク
の中周部のスチール再生を一時間行ない、再生画質の劣
化の有無、ディスク表面の再生針による傷つき程度を調
べた。
(3) To determine the wear resistance of the disk, the middle circumferential portion of a sample disk of a predetermined composition was reproduced from steel for one hour, and the presence or absence of deterioration of the reproduced image quality and the degree of damage caused by the reproduction needle on the disk surface were examined.

(4)再生針の寿命は、試料ディスクの再生を全周域に
わたり繰り返し再生を行ない、再生針の長さが2.5部
m減少するまでの時間を測定した。
(4) The life of the regeneration needle was measured by repeatedly reproducing the sample disk over the entire circumference and measuring the time until the length of the regeneration needle decreased by 2.5 parts m.

発明の効果 以上の説明から明らかなように、本発明のディスク型記
録411体は、少なく店も熱可塑性樹脂と導電性カーボ
ンブランク粒子を用いて構成され、情報信号ノ:対応す
るピントが渦巻状あるいは同心円15 ・、 状に所定の間隔を隔てて形成されると共に、前記熱可塑
性樹脂が塩化ビニル系樹脂と前述の一般式(I)で示さ
れるアルキルアラルキル変性シリコーンを含み、その成
分構成比が塩化ビニル系樹脂1o○重量部に対し、アル
キルアラルキル変性シリコーンが、0.6〜1.2重量
部であることを特徴とするものであり、従来のジメチル
シリコーン油や、メチルフェニル変性シリコーン油を加
えていたものに比べ、耐摩耗性に優れた、特に再生針の
耐摩耗性を著しく向上させた導電性ディスク型記録担体
の製造が可能になる。
Effects of the Invention As is clear from the above explanation, the disk-type recording body of the present invention is constructed using a thermoplastic resin and conductive carbon blank particles, and the information signal and the corresponding focus are spiral-shaped. Alternatively, they are formed in the shape of 15 concentric circles spaced apart from each other at a predetermined interval, and the thermoplastic resin includes a vinyl chloride resin and an alkylaralkyl-modified silicone represented by the above-mentioned general formula (I), and the component composition ratio thereof is It is characterized by containing 0.6 to 1.2 parts by weight of the alkylaralkyl-modified silicone per 10 parts by weight of the vinyl chloride resin. It becomes possible to manufacture a conductive disk-type record carrier that has superior wear resistance, especially the wear resistance of the playback stylus, compared to those in which the present invention was added.

Claims (1)

【特許請求の範囲】 少なくとも熱可塑性樹脂と導電性カーボンブラック粒子
を用いて構成され、情報信号と対応するピットが渦巻状
あるいは同心円状に所定の間隔を隔てて形成されると共
に、前記熱可塑性樹脂が、塩化ビニル系樹脂と、一般式 で示されるアルキルアラルキル変性シリコーンヲ含み、
その成分構成比が塩化ビニル系樹脂100重量部に対シ
、アルキルアラルキル変性シリコーンが0.62、、−
7 〜1.2重量部であることを特徴とする導電性ディスク
型記録担体。
[Scope of Claims] Comprised of at least a thermoplastic resin and conductive carbon black particles, pits corresponding to information signals are formed at predetermined intervals in a spiral or concentric manner, and the thermoplastic resin contains a vinyl chloride resin and an alkylaralkyl-modified silicone represented by the general formula,
The component composition ratio is 0.62 of the alkylaralkyl-modified silicone to 100 parts by weight of the vinyl chloride resin, -
7 to 1.2 parts by weight of a conductive disk type record carrier.
JP22235582A 1982-12-17 1982-12-17 Conductive disc type recording medium Granted JPS59112450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22235582A JPS59112450A (en) 1982-12-17 1982-12-17 Conductive disc type recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22235582A JPS59112450A (en) 1982-12-17 1982-12-17 Conductive disc type recording medium

Publications (2)

Publication Number Publication Date
JPS59112450A true JPS59112450A (en) 1984-06-28
JPS647409B2 JPS647409B2 (en) 1989-02-08

Family

ID=16781037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22235582A Granted JPS59112450A (en) 1982-12-17 1982-12-17 Conductive disc type recording medium

Country Status (1)

Country Link
JP (1) JPS59112450A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005008791A (en) * 2003-06-20 2005-01-13 Ge Toshiba Silicones Co Ltd Conductive liquid silicone rubber composition
JP2010043282A (en) * 2009-11-09 2010-02-25 Momentive Performance Materials Inc Conductive liquid silicone rubber composition
WO2017170221A1 (en) * 2016-03-28 2017-10-05 日本ゼオン株式会社 Vinyl chloride resin composition, vinyl chloride resin molded body, and laminate

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005008791A (en) * 2003-06-20 2005-01-13 Ge Toshiba Silicones Co Ltd Conductive liquid silicone rubber composition
JP4593087B2 (en) * 2003-06-20 2010-12-08 モメンティブ・パフォーマンス・マテリアルズ・ジャパン合同会社 Conductive liquid silicone rubber composition
JP2010043282A (en) * 2009-11-09 2010-02-25 Momentive Performance Materials Inc Conductive liquid silicone rubber composition
WO2017170221A1 (en) * 2016-03-28 2017-10-05 日本ゼオン株式会社 Vinyl chloride resin composition, vinyl chloride resin molded body, and laminate
CN108884286A (en) * 2016-03-28 2018-11-23 日本瑞翁株式会社 Vinyl chloride resin composition, vinyl chloride resin formed body and laminated body
EP3438189A4 (en) * 2016-03-28 2019-11-20 Zeon Corporation Vinyl chloride resin composition, vinyl chloride resin molded body, and laminate
CN108884286B (en) * 2016-03-28 2021-04-20 日本瑞翁株式会社 Vinyl chloride resin composition, vinyl chloride resin molded article, and laminate
US11015049B2 (en) 2016-03-28 2021-05-25 Zeon Corporation Vinyl chloride resin composition, vinyl chloride resin molded product, and laminate
US11236225B2 (en) 2016-03-28 2022-02-01 Zeon Corporation Vinyl chloride resin composition, vinyl chloride resin molded product, and laminate

Also Published As

Publication number Publication date
JPS647409B2 (en) 1989-02-08

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