JPS56156933A - Production of sheet for magnetic recording card - Google Patents

Production of sheet for magnetic recording card

Info

Publication number
JPS56156933A
JPS56156933A JP5791180A JP5791180A JPS56156933A JP S56156933 A JPS56156933 A JP S56156933A JP 5791180 A JP5791180 A JP 5791180A JP 5791180 A JP5791180 A JP 5791180A JP S56156933 A JPS56156933 A JP S56156933A
Authority
JP
Japan
Prior art keywords
synthetic resin
sheet
die
extruders
production
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.)
Granted
Application number
JP5791180A
Other languages
Japanese (ja)
Other versions
JPS6037975B2 (en
Inventor
Shigekazu Takeda
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 JP55057911A priority Critical patent/JPS6037975B2/en
Priority to GB8041053A priority patent/GB2068295B/en
Priority to US06/220,085 priority patent/US4356391A/en
Publication of JPS56156933A publication Critical patent/JPS56156933A/en
Publication of JPS6037975B2 publication Critical patent/JPS6037975B2/en
Expired legal-status Critical Current

Links

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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8408—Processes or apparatus specially adapted for manufacturing record carriers protecting the magnetic layer

Landscapes

  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obtain a sheet having a high adhesive property at the magnetic band, by extruding the 1st synthetic resin and the 2nd synthetic resin mixed with the iron oxide powder through two extruders with a common T die to laminate them and then contact bonding a synthetic resin film having a melting point higher than the 1st and 2nd synthetic resins on the surface of the 2nd synthetic resin sheet. CONSTITUTION:The 1st synthetic resin and the 2nd synthetic resin (replaceable with the same type of the 1st synthetic resin) mixed with the iron oxide powder 4a are extruded from the 1st and 2nd extruders 1 and 2 via a common T die 5. The 2nd synthetic resin 4 is laminated entirely to the 1st synthetic resin 3 or buried into the resin 3 in a belt form to obtain a sheet. For this purpose, one or more gutters 5a are provided into the die 5 and in the flow path of the extruder 2. After this, a synthetic resin film 9 having a fusing point higher than those of resins 3 and 4 is contact bonded by means of rolls 6 and 7. Thus a sheet for card is formed and then rolled up. In such a way, a sheet for magnetic card is obtained without any damage or exfoliation of the magnetic band.
JP55057911A 1979-12-28 1980-05-02 Method for manufacturing sheet for magnetic recording card Expired JPS6037975B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55057911A JPS6037975B2 (en) 1980-05-02 1980-05-02 Method for manufacturing sheet for magnetic recording card
GB8041053A GB2068295B (en) 1979-12-28 1980-12-22 Security card
US06/220,085 US4356391A (en) 1979-12-28 1980-12-24 Magnetic cards and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55057911A JPS6037975B2 (en) 1980-05-02 1980-05-02 Method for manufacturing sheet for magnetic recording card

Publications (2)

Publication Number Publication Date
JPS56156933A true JPS56156933A (en) 1981-12-03
JPS6037975B2 JPS6037975B2 (en) 1985-08-29

Family

ID=13069165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55057911A Expired JPS6037975B2 (en) 1979-12-28 1980-05-02 Method for manufacturing sheet for magnetic recording card

Country Status (1)

Country Link
JP (1) JPS6037975B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0224830A (en) * 1988-07-14 1990-01-26 Teijin Ltd Sheet for magnetic recording and production thereof
JPH0229920A (en) * 1988-07-19 1990-01-31 Teijin Ltd Magnetic recording sheet
EP2303542B1 (en) * 2008-06-20 2017-04-12 Giesecke & Devrient GmbH Data storage card and method for the manufacture of a data storage card

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0224830A (en) * 1988-07-14 1990-01-26 Teijin Ltd Sheet for magnetic recording and production thereof
JPH0229920A (en) * 1988-07-19 1990-01-31 Teijin Ltd Magnetic recording sheet
EP2303542B1 (en) * 2008-06-20 2017-04-12 Giesecke & Devrient GmbH Data storage card and method for the manufacture of a data storage card

Also Published As

Publication number Publication date
JPS6037975B2 (en) 1985-08-29

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