JPS5462275A - Production of polyester film - Google Patents

Production of polyester film

Info

Publication number
JPS5462275A
JPS5462275A JP12908877A JP12908877A JPS5462275A JP S5462275 A JPS5462275 A JP S5462275A JP 12908877 A JP12908877 A JP 12908877A JP 12908877 A JP12908877 A JP 12908877A JP S5462275 A JPS5462275 A JP S5462275A
Authority
JP
Japan
Prior art keywords
films
longitudinal direction
production
simultaneous biaxial
polyester film
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
JP12908877A
Other languages
Japanese (ja)
Inventor
Tsugio Nagasawa
Kenichi Saeki
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 JP12908877A priority Critical patent/JPS5462275A/en
Publication of JPS5462275A publication Critical patent/JPS5462275A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE: After simultaneous biaxial orientation, monoaxial orientation at a specific draw ratio is effected in the longitudinal direction to produce polyester films with increased tensile strength in one direction and simultaneously improved slipping properties.
CONSTITUTION: Unoriented polyethylene terephthalate films are subjected to simultaneous biaxial orientation at 80-90°C at a stretch ratio of 3-3.5 in both directions. Then the resulting films are oriented monoaxially at 100-220°C at a stretch ratio of 2-3.5 in the longitudinal direction to form the objective films.
COPYRIGHT: (C)1979,JPO&Japio
JP12908877A 1977-10-26 1977-10-26 Production of polyester film Pending JPS5462275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12908877A JPS5462275A (en) 1977-10-26 1977-10-26 Production of polyester film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12908877A JPS5462275A (en) 1977-10-26 1977-10-26 Production of polyester film

Publications (1)

Publication Number Publication Date
JPS5462275A true JPS5462275A (en) 1979-05-19

Family

ID=15000771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12908877A Pending JPS5462275A (en) 1977-10-26 1977-10-26 Production of polyester film

Country Status (1)

Country Link
JP (1) JPS5462275A (en)

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