KR930001158A - 광 디스크 기판의 제조방법 - Google Patents
광 디스크 기판의 제조방법 Download PDFInfo
- Publication number
- KR930001158A KR930001158A KR1019920009746A KR920009746A KR930001158A KR 930001158 A KR930001158 A KR 930001158A KR 1019920009746 A KR1019920009746 A KR 1019920009746A KR 920009746 A KR920009746 A KR 920009746A KR 930001158 A KR930001158 A KR 930001158A
- Authority
- KR
- South Korea
- Prior art keywords
- temperature
- manufacturing
- optical disc
- methyl
- pentene
- Prior art date
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
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 광디스크의 휨량 측정방법 설명도.
Claims (7)
- 부하 5kg, 온도 260℃하에 ASTM D 1238에 의해 측정한 용융유속(MFR)이 240~1200g/10분, DSC에 의해 측정한 융점이 234~240℃인 4-메틸-1-펜텐 중합체 또는 공중합체의 페레트를 실린더의 적어도 일부의 온도가 320~370℃이고, 모울드 온도가 55℃이하인 조건하에서 기판으로 사출성형하는 것이 특징인 광디스크기판의 제조방법.
- 제1항에 있어서, 4-메틸-1-펜텐 공중합체는 4-메틸-1-펜텐과 α-올레핀의 공중합체인 것이 특징인 광디스크기판의 제조방법.
- 제1 또는 제2항에 있어서, 실린더 온도가 335~350℃이고, 모울드온도가 10~50℃인 것이 특징인 광디스크 기판의 제조방법.
- 부하 5kg, 온도 260℃하에 ASTM D 1238에 의해 측정한 용융유속(MFR)이 240~1200g/10분, DSC에 의해 측정한 융점이 234~240℃이며, 4-메틸-1-펜텐으로부터 유도된 반복단위 94~99.5중량%와 4~24탄소수의 α-올레핀으로부터 유도되는 반복단위 6~0.5중량%로 된 4-메틸-1-펜텐 공중합체의 페레트를 실린더의 적어도 일부의 온도가 320~370℃이고, 모울드 온도가 55℃이하인 조건하에서 기판으로 사출성형하는 것이 특징인 광디스크기판의 제조방법.
- 제4항에 있어서, 실린더 온도가 335~350℃이고 모울드온도가 10~50℃인 것이 특징인 광디스크기판의 제조방법.
- 제1항에 있어서, 4-메틸-1-펜텐의 단독중합체 페레트를 사용하는 것이 특징인 광디스크기판의 제조방법.
- 제6항에 있어서, 실린더의 온도가 335~350℃이고, 모울드 온도가 10~50℃인 것이 특징인 광디스크기판의 제조방법.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13446291 | 1991-06-05 | ||
JP91-134462 | 1991-06-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR930001158A true KR930001158A (ko) | 1993-01-16 |
KR100246200B1 KR100246200B1 (ko) | 2000-03-15 |
Family
ID=15128896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019920009746A KR100246200B1 (ko) | 1991-06-05 | 1992-06-05 | 광디스크기판의 제조방법 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5354517A (ko) |
EP (1) | EP0518231B1 (ko) |
KR (1) | KR100246200B1 (ko) |
CA (1) | CA2070444C (ko) |
DE (1) | DE69210308T2 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3043966B2 (ja) * | 1995-02-07 | 2000-05-22 | 株式会社名機製作所 | 光学的ディスク製品の製造方法 |
US6835440B1 (en) | 1998-12-07 | 2004-12-28 | Nippon Zeon Co., Ltd. | Light transmitting plate |
WO2000048172A2 (en) | 1999-02-12 | 2000-08-17 | General Electric Company | Data storage media |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58160306A (ja) * | 1982-03-18 | 1983-09-22 | Konishiroku Photo Ind Co Ltd | 光学用樹脂組成物および光学用素子 |
JPS58176204A (ja) * | 1982-04-12 | 1983-10-15 | Mitsui Petrochem Ind Ltd | ポリ4−メチル−1−ペンテン製デイスク及びその製造方法 |
JPS61296548A (ja) * | 1985-06-25 | 1986-12-27 | Matsushita Electric Works Ltd | 光デイスク基板の製法 |
US4837277A (en) * | 1986-12-16 | 1989-06-06 | Mitsui Petrochemical Industries, Ltd. | Poly(4-methyl-1-pentane) composition and articles molded therefrom |
US4921205A (en) * | 1988-05-17 | 1990-05-01 | Sola Usa, Inc. | Lens mold assembly |
JP3062294B2 (ja) * | 1991-05-10 | 2000-07-10 | ティーディーケイ株式会社 | 光記録媒体 |
-
1992
- 1992-06-04 CA CA002070444A patent/CA2070444C/en not_active Expired - Fee Related
- 1992-06-05 KR KR1019920009746A patent/KR100246200B1/ko not_active IP Right Cessation
- 1992-06-05 EP EP92109544A patent/EP0518231B1/en not_active Expired - Lifetime
- 1992-06-05 DE DE69210308T patent/DE69210308T2/de not_active Expired - Fee Related
-
1993
- 1993-04-27 US US08/054,033 patent/US5354517A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2070444A1 (en) | 1992-12-06 |
DE69210308D1 (de) | 1996-06-05 |
EP0518231A3 (en) | 1993-04-07 |
CA2070444C (en) | 1999-01-19 |
DE69210308T2 (de) | 1996-10-10 |
EP0518231B1 (en) | 1996-05-01 |
KR100246200B1 (ko) | 2000-03-15 |
EP0518231A2 (en) | 1992-12-16 |
US5354517A (en) | 1994-10-11 |
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Legal Events
Date | Code | Title | Description |
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A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
LAPS | Lapse due to unpaid annual fee |