JPS5562530A - Non-expanding and contracting hard smooth magnetic medium - Google Patents

Non-expanding and contracting hard smooth magnetic medium

Info

Publication number
JPS5562530A
JPS5562530A JP13446778A JP13446778A JPS5562530A JP S5562530 A JPS5562530 A JP S5562530A JP 13446778 A JP13446778 A JP 13446778A JP 13446778 A JP13446778 A JP 13446778A JP S5562530 A JPS5562530 A JP S5562530A
Authority
JP
Japan
Prior art keywords
layer
foams
sheets
magnetic medium
orthogonal
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
JP13446778A
Other languages
Japanese (ja)
Inventor
Yoshiro Nakamatsu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP13446778A priority Critical patent/JPS5562530A/en
Publication of JPS5562530A publication Critical patent/JPS5562530A/en
Pending legal-status Critical Current

Links

Landscapes

  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To obtain a non-expanding and contracting smooth magnetic medium of a large hardness by extending a sheet of air-foamed polypropylene, etc., and laminating sheets so that the extending direction may be orthogonal mutually and forming a magnetic coating layer on these sheets through a specific coating layer.
CONSTITUTION: A sheet of air-foamed polypropylene, etc., is extended in one direction, and sheets where foams are extended into an oval are laminated in three layers so that extending directions may be orthogonal mutually, for example, foams 17 and 16 of sheets 5 and 7 may be in the extending direction and foam 12 of sheet 6 may be have an extending direction orthogonal to foams 17 and 16. Coating layer 4 with one smooth face is formed on this three-layer carrier so that concave 8 in the polypropylene layer 5 side may be anchored with convex part 19 of layer 4, and magnetic layer 3 is provided on layer 4. Thus, the carrier increases its hardness and has a non-expansion and contraction property because foams 17, 12 and 16 are orthogonal to one another, so that a magnetic medium of good characteristic such as S/N ratio can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP13446778A 1978-11-02 1978-11-02 Non-expanding and contracting hard smooth magnetic medium Pending JPS5562530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13446778A JPS5562530A (en) 1978-11-02 1978-11-02 Non-expanding and contracting hard smooth magnetic medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13446778A JPS5562530A (en) 1978-11-02 1978-11-02 Non-expanding and contracting hard smooth magnetic medium

Publications (1)

Publication Number Publication Date
JPS5562530A true JPS5562530A (en) 1980-05-12

Family

ID=15128996

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13446778A Pending JPS5562530A (en) 1978-11-02 1978-11-02 Non-expanding and contracting hard smooth magnetic medium

Country Status (1)

Country Link
JP (1) JPS5562530A (en)

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