JPS6231046A - エア−サンドイツチ型光デイスク - Google Patents

エア−サンドイツチ型光デイスク

Info

Publication number
JPS6231046A
JPS6231046A JP60170734A JP17073485A JPS6231046A JP S6231046 A JPS6231046 A JP S6231046A JP 60170734 A JP60170734 A JP 60170734A JP 17073485 A JP17073485 A JP 17073485A JP S6231046 A JPS6231046 A JP S6231046A
Authority
JP
Japan
Prior art keywords
optical disk
polycarbonate
disk
polymethyl methacrylate
ultrasonic welding
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
Application number
JP60170734A
Other languages
English (en)
Inventor
Shiyuuzou Iyoshi
就三 伊吉
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.)
Daicel Corp
Original Assignee
Daicel Chemical Industries 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 Daicel Chemical Industries Ltd filed Critical Daicel Chemical Industries Ltd
Priority to JP60170734A priority Critical patent/JPS6231046A/ja
Publication of JPS6231046A publication Critical patent/JPS6231046A/ja
Pending legal-status Critical Current

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • 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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3024—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being non-integral with the parts to be joined
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B29C66/53462—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies joining substantially flat covers and substantially flat bottoms to open ends of container bodies
    • 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)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は光ディスクに関する。更に詳しくは、超音波溶
着により貼り合わされた、エアーサンドイッチ構造の光
ディスクに関する。
〔従来の技術及び問題点〕
従来、光ディスクとしては、例えば、第３図に示すよう
な、２枚のポリカーボネート製のディスク基板１を記録
膜層２を内側にして、中間にポリカーボネートからなる
スペーサー３を挟んで、接着剤４によって貼り合わせた
、エアーサンドイッチ構造の光ディスク、第４図に示す
ような、２枚のポリカーボネート製のディスク基板１を
記録膜層２を内側にして、中間にポリカーボネートから
なる外周用突起付きスペーサー６及びポリカーボネート
からなる内周用突起付きスペーサー７を挟んで、超音波
溶着によって貼り合わされるエアーサンドイッチ構造の
光ディスク等が知られている。尚、第３図及び第４図に
おいて、５はエアー空間である。
第３図の如く接着剤によって貼り合わせる場合、ホント
メルトタイプあるいは紫外線硬化タイプの接着剤を用い
ても、第４図に示す超音波溶着によって貼り合わせる場
合に比べて生産コストが高くなる。
しかしながら、一般に超音波溶着は大きな接着面に対し
ては十分な接着力が得られず、比較的小さな５０　ｍ／
ｍφ以下ぐらいの接着面に対しては非常に強力な接着力
が得られる。例えば、特開昭５８−２０３６４５号公報
には光ディスクの内周部を超音波溶着し、外周部をホッ
トメルト接着した光ディスクが提案されている。しかし
、この場合２種類の接着法を用いるために更に生産コス
トが高くなる。
又、特開昭５８−１９４１５３号公報には、比較的大き
な３００ｍ／ｍφ以下ぐらいの接着面に対しても十分な
接着力を得るために、スペーサーの突起部を２列に４ｍ
／ｍ幅で平行して付けるという方法が提案されている。
しかしながら、この場合ディスク基板がポリカーボネー
ト製であるものに対しては十分な接着力が得られない。
ポリカーボネートはポリメチルメタクリレートよりも耐
熱性、耐衝撃性が優れ、吸水率も小さく、環境変化に対
する湾曲（変形）も少ないために近年多く使用されるよ
うになってきた。
又、一般に超音波溶着による接着性能はポリスチレン、
ポリメチルメタクリレートのような硬くてもろい樹脂は
良好であるが、ポリカーボネート、セルロースアセテー
トのように柔らかくて強靭な樹脂は超音波溶着て十分な
接着力を得るのが比較的困難である。
〔問題点を解決するための手段〕
本発明者らは、かかる従来の光ディスクの欠点を改良す
べく鋭意研究の結果、本発明を完成するに至った。
即ち、本発明は、２枚の光ディスク基板を記録膜を内側
にして、中間にスペーサーを挟んで超音波溶着により貼
り合わせたエアーサンドイッチ構造の光ディスクにおい
て、基板がポリカーボネートからなり、スペーサーがポ
リメチルメタクリレートからなることを特徴とする光デ
ィスクを提供するものである・。
〔実施例〕
本発明の実施態様を図面に基づいて更に詳しく述べる。
第１図は本発明の光ディスクの一実施例の超音波溶着前
の状態を示す断面図である。
本実施例の光ディスクは２枚のポリカーボネート製のデ
ィスク基板１を記録膜層２を内側にして、中間にポリメ
チルメタクリレートからなる外周用突起付きスペーサー
８及びポリメチルメタクリレートからなる内周用突起付
きスペーサー９を挟んだものであり、これを上から超音
波振動を与えると、第２図に示すような超音波溶着によ
り貼り合わされたエアーサンドイッチ構造の光ディスク
が出来上がる。
〔発明の効果〕
本発明の光ディスクは接着が容易であり、溶着時間が短
縮できる。又、十分な接着力を持ち、接着が均一になる
ので、ディスクのねじれ、そり等が防止でき、読みとり
エラーが少なくなる。
【図面の簡単な説明】
第１図は本発明の光ディスクの一実施例の超音波溶着に
よって貼り合わされる前の状態を示す断面図、第２図は
その超音波溶着によって貼り合わされた後の状態を示す
断面図、第３図は先行技術による接着剤により貼り合わ
されたエアーサンドイッチ構造の光ディスクの断面図、
第４図は先行技術による超音波溶着により貼り合わされ
るべきエアーサンドイッチ構造の光ディスクの断面図で
ある。 １：ポリカーボネート製ディスク基板 ２：記録膜層 ３：ポリカーボネートからなるスペーサー４：接着剤 ５：エアー空間 ６：ポリカーボネートからなる外周用突起付きスペーサ
ー ７：ポリカーボネートからなる内周用突起付きスペーサ
ー ８：ポリメチルメタクリレートからなる外周用突起付き
スペーサー ９：ポリメチルメタクリレートからなる内周用突起付き
スペーサー

Claims (1)

    【特許請求の範囲】
  1. 　２枚の光ディスク基板を記録膜を内側にして、中間に
    スペーサーを挟んで超音波溶着により貼り合わせたエア
    ーサンドイッチ構造の光ディスクにおいて、基板がポリ
    カーボネートからなり、スペーサーがポリメチルメタク
    リレートからなることを特徴とする光ディスク。
JP60170734A 1985-08-02 1985-08-02 エア−サンドイツチ型光デイスク Pending JPS6231046A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60170734A JPS6231046A (ja) 1985-08-02 1985-08-02 エア−サンドイツチ型光デイスク

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60170734A JPS6231046A (ja) 1985-08-02 1985-08-02 エア−サンドイツチ型光デイスク

Publications (1)

Publication Number Publication Date
JPS6231046A true JPS6231046A (ja) 1987-02-10

Family

ID=15910397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60170734A Pending JPS6231046A (ja) 1985-08-02 1985-08-02 エア−サンドイツチ型光デイスク

Country Status (1)

Country Link
JP (1) JPS6231046A (ja)

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