JPS57179956A - Optical recording member - Google Patents

Optical recording member

Info

Publication number
JPS57179956A
JPS57179956A JP56063012A JP6301281A JPS57179956A JP S57179956 A JPS57179956 A JP S57179956A JP 56063012 A JP56063012 A JP 56063012A JP 6301281 A JP6301281 A JP 6301281A JP S57179956 A JPS57179956 A JP S57179956A
Authority
JP
Japan
Prior art keywords
film
content
proof
recording film
corrosion
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
JP56063012A
Other languages
Japanese (ja)
Inventor
Toshiharu Nakagawa
Yoshinori Fujimori
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56063012A priority Critical patent/JPS57179956A/en
Publication of JPS57179956A publication Critical patent/JPS57179956A/en
Pending legal-status Critical Current

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
    • G11B7/254—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 protective topcoat layers
    • G11B7/2542—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 protective topcoat layers consisting essentially of organic resins

Abstract

PURPOSE:To increase the moisture-proof and corrosion-proof properties, by protecting the surface of a recording film with a coating film of ethylene vinylacetate copolymer. CONSTITUTION:A recording film 12 is provided on a base 11 and the film is covered with an ethylene vinylaceate copolymer protecting film 13. Since the adhesion properties with the recording film is degraded with too low vinylacetate content on the coplymer and the water transmitting rate and the water absorbing rate are increased with an excessive content, the corrosion-proof performance is deteriorated. Thus, the content is preferably 15-40wt%.
JP56063012A 1981-04-25 1981-04-25 Optical recording member Pending JPS57179956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56063012A JPS57179956A (en) 1981-04-25 1981-04-25 Optical recording member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56063012A JPS57179956A (en) 1981-04-25 1981-04-25 Optical recording member

Publications (1)

Publication Number Publication Date
JPS57179956A true JPS57179956A (en) 1982-11-05

Family

ID=13216976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56063012A Pending JPS57179956A (en) 1981-04-25 1981-04-25 Optical recording member

Country Status (1)

Country Link
JP (1) JPS57179956A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256935A (en) * 1984-06-01 1985-12-18 Matsushita Electric Ind Co Ltd Optical information carrier disc
JPS62205552A (en) * 1986-03-05 1987-09-10 Canon Inc Optical recording medium
US11526033B2 (en) 2018-09-28 2022-12-13 Finewell Co., Ltd. Hearing device
US11601538B2 (en) 2014-12-18 2023-03-07 Finewell Co., Ltd. Headset having right- and left-ear sound output units with through-holes formed therein

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555857A (en) * 1978-06-29 1980-01-17 Fuji Photo Film Co Ltd Thermal recording material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555857A (en) * 1978-06-29 1980-01-17 Fuji Photo Film Co Ltd Thermal recording material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256935A (en) * 1984-06-01 1985-12-18 Matsushita Electric Ind Co Ltd Optical information carrier disc
JPS62205552A (en) * 1986-03-05 1987-09-10 Canon Inc Optical recording medium
JPH0690807B2 (en) * 1986-03-05 1994-11-14 キヤノン株式会社 Optical recording medium
US11601538B2 (en) 2014-12-18 2023-03-07 Finewell Co., Ltd. Headset having right- and left-ear sound output units with through-holes formed therein
US11526033B2 (en) 2018-09-28 2022-12-13 Finewell Co., Ltd. Hearing device

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