JPS644398A - Writing medium - Google Patents

Writing medium

Info

Publication number
JPS644398A
JPS644398A JP15922487A JP15922487A JPS644398A JP S644398 A JPS644398 A JP S644398A JP 15922487 A JP15922487 A JP 15922487A JP 15922487 A JP15922487 A JP 15922487A JP S644398 A JPS644398 A JP S644398A
Authority
JP
Japan
Prior art keywords
ethylene
film
tetrafluoroethylene
writing
tetrafluoroethylene copolymer
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
JP15922487A
Other languages
Japanese (ja)
Inventor
Takehiko Shimomura
Kunio Murakami
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.)
Unitika Ltd
Original Assignee
Unitika 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 Unitika Ltd filed Critical Unitika Ltd
Priority to JP15922487A priority Critical patent/JPS644398A/en
Publication of JPS644398A publication Critical patent/JPS644398A/en
Pending legal-status Critical Current

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)
  • Laminated Bodies (AREA)

Abstract

PURPOSE: To obtain good performances including ability of easy writing by ink, erasing of ink and winding itself by forming a specified thick drawn ethylene-tetrafluoroethylene copolymer film layer on the surface of a writing medium. CONSTITUTION: A 1-50 μ thick, drawn in at least one direction, ethylene- tetrafluoroethylene copolymer film layer is formed on the writing surface of electronic writing board. The ethylene-tetrafluoroethylene copolymer (ETFE) film used here contains mainly ethylene-tetrafluoroethylene and it is recommended for forming and drawing film that the mole ratio of ethylene and tetrafluoroethylene is in the range of 40:60-20:80. Addition of the 3rd component such as other fluoro-olefine than tetrafluoroethylene for copolymerization is effective to improve drawing performance of the film. The thinner film reduces the cost more but the thickness of ETFE film is recommended in the range of 8-25 μ to prevent fracture or wrinkle problems in manufacturing.
JP15922487A 1987-06-25 1987-06-25 Writing medium Pending JPS644398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15922487A JPS644398A (en) 1987-06-25 1987-06-25 Writing medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15922487A JPS644398A (en) 1987-06-25 1987-06-25 Writing medium

Publications (1)

Publication Number Publication Date
JPS644398A true JPS644398A (en) 1989-01-09

Family

ID=15689050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15922487A Pending JPS644398A (en) 1987-06-25 1987-06-25 Writing medium

Country Status (1)

Country Link
JP (1) JPS644398A (en)

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