JPS5446011A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5446011A
JPS5446011A JP11240077A JP11240077A JPS5446011A JP S5446011 A JPS5446011 A JP S5446011A JP 11240077 A JP11240077 A JP 11240077A JP 11240077 A JP11240077 A JP 11240077A JP S5446011 A JPS5446011 A JP S5446011A
Authority
JP
Japan
Prior art keywords
vinly
vinyl
acetate
magnetic
vinyl alcohol
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
JP11240077A
Other languages
Japanese (ja)
Inventor
Hiroshi Ogawa
Yasuo Tamai
Akira Kasuga
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP11240077A priority Critical patent/JPS5446011A/en
Publication of JPS5446011A publication Critical patent/JPS5446011A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To smooth surface, increase square ratio, improve running characterristic and improve recording-reprodcing characteristics of high frequency range signals by using a specific binder in the magnetic layer of audio cassette tape.
CONSTITUTION: Vinly chloride-vinly acetate copolymer of preferably 300 to 500 in degree of polymerization is hydrolyzed of parr of its vinly acetate so as to be contained with 10 to 20 (preferably 10 to 15) wt% of vinyl alcohol units. This vinyl chloride-vinyl acetate-vinyl alcohol copolymer and polyether-polyurethane prepolymer containing preferably 4 ot 10wt% of NCO groups its molecular terminal are mixed in a range of 70/30 to 50/50 in weight ratio and preferably 15 to 30pts.wt. of this mixture is used with 100ps.wt. of ferromagnetic fine powder. The magnetic coating prepared by dispersing such binder and ferromagnetic powder is coated on a non-magnetic backing and is then dried
COPYRIGHT: (C)1979,JPO&Japio
JP11240077A 1977-09-19 1977-09-19 Magnetic recording medium Pending JPS5446011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11240077A JPS5446011A (en) 1977-09-19 1977-09-19 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11240077A JPS5446011A (en) 1977-09-19 1977-09-19 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5446011A true JPS5446011A (en) 1979-04-11

Family

ID=14585701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11240077A Pending JPS5446011A (en) 1977-09-19 1977-09-19 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5446011A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158017A (en) * 1981-03-20 1982-09-29 Hitachi Maxell Ltd Magnetic recording medium
JPH03130916A (en) * 1989-10-30 1991-06-04 Tdk Corp Magnetic recording medium and its production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158017A (en) * 1981-03-20 1982-09-29 Hitachi Maxell Ltd Magnetic recording medium
JPS6126132B2 (en) * 1981-03-20 1986-06-19 Hitachi Maxell
JPH03130916A (en) * 1989-10-30 1991-06-04 Tdk Corp Magnetic recording medium and its production
JPH0514326B2 (en) * 1989-10-30 1993-02-24 Tdk Electronics Co Ltd

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