KR930008734A - Magnetic recording medium and its manufacturing method - Google Patents

Magnetic recording medium and its manufacturing method Download PDF

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Publication number
KR930008734A
KR930008734A KR1019910017562A KR910017562A KR930008734A KR 930008734 A KR930008734 A KR 930008734A KR 1019910017562 A KR1019910017562 A KR 1019910017562A KR 910017562 A KR910017562 A KR 910017562A KR 930008734 A KR930008734 A KR 930008734A
Authority
KR
South Korea
Prior art keywords
recording medium
magnetic recording
back coat
carbon black
group
Prior art date
Application number
KR1019910017562A
Other languages
Korean (ko)
Other versions
KR950011069B1 (en
Inventor
유득수
송의환
조현수
Original Assignee
하기주
주식회사 코오롱
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 하기주, 주식회사 코오롱 filed Critical 하기주
Priority to KR91017562A priority Critical patent/KR950011069B1/en
Publication of KR930008734A publication Critical patent/KR930008734A/en
Application granted granted Critical
Publication of KR950011069B1 publication Critical patent/KR950011069B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/735—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
    • G11B5/7021—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing a polyurethane or a polyisocyanate

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

비자성 지지체의 한 면에 자성층이 형성되고 다른 면에는 백코오트층이 형성된 자기 기록 매체에 있어서, 평균입경 15nm 내지 30nm, 휘발성분??량 3.0중량% 내지 10.0중량%, pH 2.0 내지 3.0의 카본블랙을 아민기가 함유된 염화비닐 공중합체를 주성분으로 하는 결합제 용액 내에 1차 분산시킨 다음에 폴리우레탄 공중합체 결합제를 첨가하여 2차 분산시켜 제조한 백코오트층용 도료를 도포하여 백코오트층을 형성한 자기 기록 매체와 그의 제조 방법이 제공된다.In the magnetic recording medium having a magnetic layer formed on one side of the nonmagnetic support and a back coat layer formed on the other side, carbon having an average particle diameter of 15 nm to 30 nm, a volatile content of 3.0 wt% to 10.0 wt%, and a pH of 2.0 to 3.0 The backcoating layer was formed by first dispersing black in a binder solution containing a vinyl chloride copolymer containing an amine group as a main component, followed by secondary dispersion by adding a polyurethane copolymer binder to form a backcoat layer. A magnetic recording medium and a manufacturing method thereof are provided.

본 발명에 따라서 제조된 자기 기록 매체는 전자변환 특성, 주행 내구성등이 우수할 뿐만 아니라, 자성층과 백코오트층을 연속적으로 일괄 도포한 후에 카렌다링을 행하더라도 카렌다의 탄성 로울러를 오염시키지 않아 생산성을 크게 향상시킬 수 있다.The magnetic recording medium produced according to the present invention not only has excellent electron conversion characteristics, running durability, etc., but also does not contaminate the elastic roller of the calendar even if calendering is performed after applying the magnetic layer and the back coat layer in a batch. It can greatly improve.

Description

자기기록 매체와 그의 제조방법Magnetic recording medium and its manufacturing method

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

Claims (6)

비자성 지지체 필림의 한쪽면에 자성층을 형성시키고, 그 반대면에 백코오트층을 형성시킨 자기 기록 매체에 있어서, 상기 백코오트층은 아민기가 함유된 염화비닐 공중합체를 주성분으로 하는 결합제 용액 내에 카본블랙을 1차 분산시킨 다음, 폴리우레탄 공중합체 결합제를 첨가하여 2차 분산시켜 제조한 백코오트층 형성용 도료를 도포하여 형성된 것을 특징으로 하는 자기 기록 매체.In a magnetic recording medium having a magnetic layer formed on one side of a nonmagnetic support film and a back coat layer formed on the opposite side thereof, the back coat layer comprises carbon in a binder solution containing a vinyl chloride copolymer containing an amine group as a main component. A magnetic recording medium formed by applying a back coat layer forming paint prepared by first dispersing black and then adding a polyurethane copolymer binder. 제 1항에 있어서, 상기 카본블랙은 평균입경 15 내지 30nm, 휘발성분함량 3.0 내지 10.0중량% 및 pH 2.5 내지 5.0의 카본블랙인 것을 특징으로 하는 자기 기록 매체.2. The magnetic recording medium of claim 1, wherein the carbon black is carbon black having an average particle diameter of 15 to 30 nm, a volatile content of 3.0 to 10.0 wt%, and a pH of 2.5 to 5.0. 제 2항에 있어서, 상기 카본블랙의 휘발성분이 카르복실기, 퀴논기, 락톤기, 페놀기인 것을 특징으로 하는 자기 기록 매체.The magnetic recording medium according to claim 2, wherein the volatile components of the carbon black are a carboxyl group, a quinone group, a lactone group, and a phenol group. 자성층과 백코오트층을 도포하는 순서에는 상관없이 연속적으로, 강자성분말, 결합제수지, 연마제, 대전방지제 및 분산제 등을 유기용매와 함께 혼합, 분산시켜 제조한 자성도료를 비자성 지지체필름의 한쪽면에 도포한 다음, 건조시켜 자성층을 형성하고, 아민기가 함유된 염화비닐 공중합체를 주성분으로 하는 결합제 용액 내에 카본블랙을 1차 분산시킨 다음, 폴리우레탄 공중합체 결합제를 첨가하여 2차분산시켜 제조한 백코오트층 형성용 도료를 비자성 지지체 필름의 다른면에 도포하여 백코오트층을 형성시킨 후, 자성층과 백코오트층을 각각 건조하고 카렌다링, 경화처리, 슬릿팅 공정을 거치게 하는 것으로 이루어지는 자기 기록 매체의 제조방법.Regardless of the order in which the magnetic layer and the back coat layer are applied, the magnetic coating prepared by mixing and dispersing the ferromagnetic powder, the binder resin, the abrasive, the antistatic agent and the dispersant together with the organic solvent is continuously applied to one side of the nonmagnetic support film. After coating, it is dried to form a magnetic layer, and the carbon black is first dispersed in a binder solution containing a vinyl chloride copolymer containing an amine group as a main component, followed by secondary dispersion by adding a polyurethane copolymer binder. A magnetic recording medium consisting of coating an oat layer-forming paint on the other side of a nonmagnetic support film to form a back coat layer, and then drying the magnetic layer and the back coat layer, respectively, and undergoing calendaring, curing, and slitting processes. Manufacturing method. 제 4항에 있어서, 상기 카본블랙은 평균입경 15 내지 30nm, 휘발성분함량 3.0 내지 10.0중량% 및 pH 2.5의 카본블랙인 것을 특징으로 하는 방법.The method of claim 4, wherein the carbon black has a mean particle diameter of 15 to 30 nm, a volatile content of 3.0 to 10.0% by weight, and a carbon black having a pH of 2.5. 제 5항에 있어서, 상기 카본블랙의 휘발성분이 카르복실기, 퀴논기, 락톤기, 페놀기인 것을 특징으로 하는 방법.The method according to claim 5, wherein the volatile component of the carbon black is a carboxyl group, a quinone group, a lactone group, or a phenol group. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR91017562A 1991-10-07 1991-10-07 Magnetic recording medium and manufacturing method of it KR950011069B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR91017562A KR950011069B1 (en) 1991-10-07 1991-10-07 Magnetic recording medium and manufacturing method of it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR91017562A KR950011069B1 (en) 1991-10-07 1991-10-07 Magnetic recording medium and manufacturing method of it

Publications (2)

Publication Number Publication Date
KR930008734A true KR930008734A (en) 1993-05-21
KR950011069B1 KR950011069B1 (en) 1995-09-27

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KR91017562A KR950011069B1 (en) 1991-10-07 1991-10-07 Magnetic recording medium and manufacturing method of it

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101054693B1 (en) * 2007-11-09 2011-08-08 제일모직주식회사 Transparent thermoplastic resin and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101054693B1 (en) * 2007-11-09 2011-08-08 제일모직주식회사 Transparent thermoplastic resin and preparation method thereof

Also Published As

Publication number Publication date
KR950011069B1 (en) 1995-09-27

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