KR940006759A - Magnetic recording medium and manufacturing method thereof - Google Patents

Magnetic recording medium and manufacturing method thereof Download PDF

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Publication number
KR940006759A
KR940006759A KR1019920015846A KR920015846A KR940006759A KR 940006759 A KR940006759 A KR 940006759A KR 1019920015846 A KR1019920015846 A KR 1019920015846A KR 920015846 A KR920015846 A KR 920015846A KR 940006759 A KR940006759 A KR 940006759A
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KR
South Korea
Prior art keywords
carbon black
magnetic
recording medium
magnetic recording
paint
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KR1019920015846A
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Korean (ko)
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KR950013695B1 (en
Inventor
조현수
유득수
이상호
Original Assignee
하기주
주식회사 코오롱
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Application filed by 하기주, 주식회사 코오롱 filed Critical 하기주
Priority to KR1019920015846A priority Critical patent/KR950013695B1/en
Publication of KR940006759A publication Critical patent/KR940006759A/en
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Publication of KR950013695B1 publication Critical patent/KR950013695B1/en

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84Processes or apparatus specially adapted for manufacturing record carriers

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  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

자성체, 연마재, 분산제, 카본블랙을 결합제 용액에 분산시켜 자성도료를 재조하고 이를 베이스 필름상에 도포하는 자기 기록 매체의 재조 방법에 있어서, 상기한 자성도료의 제조 공정이, 자성체, 연마제를 1차 접착제 용액중에 1차 분산시켜 카본블랙이 첨가되지 않은 1차 자성 도료를 제조하고 카본블랙을 분산제와 함께 카본블랙 접착제 용액중에 분산시켜 카본블랙 1차분산 도료를 제조하고, 상기의 카본블랙이 첨가되지 않은 1차 자성도료와 카본블랙 1차 분산 도료를 혼합하고 2차 결합제 용액중에 2차 분산시키는 것으로 이루어지는 것을 특징으로 하는 자기 기록 매체의 제조방법 및 그로부터 제조되는 자기 기록 매체는 카본 블랙의 분산성을 향상시켜 자성층의 박막화 및 전자변화 특성이 우수하다.In the method of manufacturing a magnetic recording medium in which a magnetic material, an abrasive, a dispersant, and carbon black are dispersed in a binder solution to prepare a magnetic paint and apply the same on a base film, the above-described manufacturing process of the magnetic paint includes a magnetic material and an abrasive as a primary method. A primary magnetic paint without carbon black is prepared by primary dispersion in an adhesive solution, and carbon black is dispersed in a carbon black adhesive solution with a dispersant to prepare a carbon black primary dispersion paint, and the carbon black is not added. The method of manufacturing a magnetic recording medium and the magnetic recording medium produced therefrom are characterized by mixing the primary magnetic paint and the carbon black primary dispersion paint and dispersing it in the secondary binder solution. By improving the thickness of the magnetic layer and excellent electron change characteristics.

Description

자기 기록 매체 및 그의 제조 방법Magnetic recording medium and manufacturing method thereof

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (6)

자성체, 연마제, 분산제, 카본 블랙을 결합제 영역에 분산시켜 자성도료를 제조하고 이를 베이스 필름 상에 도포하는 자기 기록 매체의 제조 방법에 있어서, 상기한 자성 도료의 제조 공정이, 카본 블랙을 분산제와 함께 카본 블랙 접착제 용액 중에 분산시켜 카본 블랙 1차 분산 도료를 제조하고, 상기의 카본 블랙이 첨가되지 않은 1차 자성도료와 카본 블랙 1차 분산 도료를 혼합하고, 2차 결합제 용액 중에 2차 분산시키는 것으로 이루어지는 것을 특징으로 하는 자기 기록 매체의 제조방법.In the method for producing a magnetic recording medium in which a magnetic material, an abrasive, a dispersant, and carbon black are dispersed in a binder region to produce a magnetic paint and coated on a base film, the above-described manufacturing process of the magnetic paint includes carbon black together with a dispersant. Dispersing in a carbon black adhesive solution to prepare a carbon black primary dispersion paint, by mixing the primary magnetic paint and the carbon black primary dispersion paint without the carbon black added, and secondary dispersion in the secondary binder solution A method for manufacturing a magnetic recording medium, characterized in that 제 1항에 있어서, 상기한 카본 블랙이 첨가되지 않은 1차 분산 자성도료는, 자성체로서 코발트 페라이트, 연마제로서 알파-알루미나, 결합제로서 비닐 알코올, 비닐 아세테이트 및 비닐 클로라이드의 공중합체인 폴리 비닐 클로라이드를 메틸 에틸 케톤, 톨루엔 및 시클로 헥사논의 혼합 용매중에 고형분 함량이 60∼80%되게 하여 습윤(kneading)시키고, 다시 상기한 혼합용매를 투입하여 고형분 함량이 40∼50%되도록 한 후, 선분산(premixing)시키고, 수직형 샌드 그라인더를 사용하여 1차 분산시켜 제조되는 것을 특징으로 하는 자기 기록 매체의 제조 방법.The method of claim 1, wherein the primary dispersion magnetic coating without carbon black is added, polyvinyl chloride which is a copolymer of cobalt ferrite as magnetic material, alpha-alumina as abrasive, vinyl alcohol as a binder, vinyl acetate and vinyl chloride as methyl. In the mixed solvent of ethyl ketone, toluene and cyclohexanone, the solid content is kneaded to 60 to 80%, and the mixed solvent is added again so that the solid content is 40 to 50%, and then premixed. And primary dispersion using a vertical sand grinder to produce the magnetic recording medium. 제 1항에 있어서, 상기한 카본 블랙 1차 분산도료는, 카본 블랙, 분산제로서 레시틴, 결합제로서 폴리 비닐 클로라이드, 폴리에스테르·폴리우레탄 공중합체 또는 니트로 셀룰로우즈로 이루어지는 군에서 선택되어지는 결합제를 메틸 에틸 케톤, 톨루엔 및 시클로 헥사논의 혼합용매 중에 고형뿐 함량이 40∼50%되게 하여 선분산시킨 후, 상기의 혼합 용매를 재차 투입하여 고형분함량을 30∼40%로 한 뒤, 샌드그라인더를 사용하여 1차 분산시켜 제조되는 것을 특징으로 하는 자기 기록 매체의 제조방법.The method of claim 1, wherein the carbon black primary dispersion paint is carbon black, a binder selected from the group consisting of lecithin as a dispersant, polyvinyl chloride as a binder, polyester / polyurethane copolymer or nitro cellulose. After linear dispersion in the mixed solvent of methyl ethyl ketone, toluene and cyclohexanone, the content of solid only was 40 to 50%, and the mixed solvent was added again to make the solid content 30 to 40%, and then sand grinder was used. And firstly dispersing the same, to produce a magnetic recording medium. 제 1항에 있어서, 상기한 2차 분산은, 상기한 카본 블랙이 첨가되지 않은 1차 분산 자성도료와 상기한 카본 블랙 1차 분산도료를 자성체 100중량부에 대하여 카본 블랙이 5∼12중량부 되도록 혼합한 후, 폴리 에스테르·폴리우레탄 공중합체의 2차 결합제에 투입하여 샌드그라인더를 이용하여 분산시키는 것으로 이루어지는 것을 특징으로 하는 자기 기록 매체의 제조방법.According to claim 1, wherein the secondary dispersion, the carbon black is 5 to 12 parts by weight based on 100 parts by weight of the magnetic dispersion of the primary dispersion magnetic coating and the carbon black primary dispersion coating is not added to the carbon black A method for producing a magnetic recording medium, characterized in that the mixture is mixed as much as possible and then added to a secondary binder of a polyester / polyurethane copolymer to be dispersed using a sand grinder. 제 1항에 또는 제 3항에 있어서, 상기한 카본 블랙은 평균입경 20㎚ 이하인 것을 특징으로 하는 자기 기록 매체의 제조방법The method of manufacturing a magnetic recording medium according to claim 1 or 3, wherein the carbon black has an average particle diameter of 20 nm or less. 제 1항 내지 제 5항중 어느 하나의 항에 의하여 제조되는 자기 기록 매체.A magnetic recording medium manufactured by any one of claims 1 to 5. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920015846A 1992-09-01 1992-09-01 Producting method of magmetic rocording medium KR950013695B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920015846A KR950013695B1 (en) 1992-09-01 1992-09-01 Producting method of magmetic rocording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920015846A KR950013695B1 (en) 1992-09-01 1992-09-01 Producting method of magmetic rocording medium

Publications (2)

Publication Number Publication Date
KR940006759A true KR940006759A (en) 1994-04-25
KR950013695B1 KR950013695B1 (en) 1995-11-13

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KR1019920015846A KR950013695B1 (en) 1992-09-01 1992-09-01 Producting method of magmetic rocording medium

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KR950013695B1 (en) 1995-11-13

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