JPS5515860A - Orientation polyester film - Google Patents
Orientation polyester filmInfo
- Publication number
- JPS5515860A JPS5515860A JP8937078A JP8937078A JPS5515860A JP S5515860 A JPS5515860 A JP S5515860A JP 8937078 A JP8937078 A JP 8937078A JP 8937078 A JP8937078 A JP 8937078A JP S5515860 A JPS5515860 A JP S5515860A
- Authority
- JP
- Japan
- Prior art keywords
- inactive
- substances
- glycol
- volume
- 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.)
- Granted
Links
Abstract
PURPOSE: To obtain an orientation polyester film which is good suited for a magnetic tape and electrical application by improving the wear-resisting performance with addition of 2 kinds of inactive substances of particular grain size.
CONSTITUTION: An orientation polyester composed of polyester (a condensed polymer of fragrant dicarbonic acid, such as terephthalic acid and isophthalic acid, etc., and glycol, such as ethylene glycol and diethylene glycol, etc.), [A] 0.03W1 wt% of inactive susbstances (such as, silica, kaoline, kaolinite, diatomaceous earth, calcium carbonate, carbon black and glass beads, etc.) having average grain diameter of 0.8μm or less and volume shape coefficient f [a value to make maximum diameter D(μm) of projected surfaces of all the inactive substances' grains and grain volume V(μm2) become f=v/D2] of 0.08 or less, and [B] 0.002W0.1 wt% of inactive substances (the same substances as [A] above) having an average grain diameter being larger than that of [A] and smaller than 1.8μm and volume shape coefficeint f of 0.08Wπ/6.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8937078A JPS5515860A (en) | 1978-07-24 | 1978-07-24 | Orientation polyester film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8937078A JPS5515860A (en) | 1978-07-24 | 1978-07-24 | Orientation polyester film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5515860A true JPS5515860A (en) | 1980-02-04 |
JPS5734088B2 JPS5734088B2 (en) | 1982-07-21 |
Family
ID=13968798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8937078A Granted JPS5515860A (en) | 1978-07-24 | 1978-07-24 | Orientation polyester film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5515860A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5968213A (en) * | 1982-10-13 | 1984-04-18 | Toray Ind Inc | Biaxially stretched polyester film |
JPS59179555A (en) * | 1983-03-30 | 1984-10-12 | Teijin Ltd | Biaxially stretched polyester film |
JPS6056531A (en) * | 1983-09-09 | 1985-04-02 | Toyobo Co Ltd | Oriented polyester film |
JPS6168727A (en) * | 1984-09-12 | 1986-04-09 | Teijin Ltd | Biaxially stretched polyester film |
JPS61177227A (en) * | 1985-02-04 | 1986-08-08 | Toyobo Co Ltd | Orientated polyester film |
JPS63175222A (en) * | 1987-01-14 | 1988-07-19 | Teijin Ltd | Magnetic recording medium |
US5006589A (en) * | 1988-06-04 | 1991-04-09 | Diafoil Company, Limited | Polyester film for magnetic recording media |
JPH05301977A (en) * | 1991-09-17 | 1993-11-16 | Toyobo Co Ltd | Oriented polyester film |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4921100A (en) * | 1972-06-16 | 1974-02-25 | ||
JPS5134272A (en) * | 1974-07-15 | 1976-03-23 | Celanese Corp | |
JPS5136779A (en) * | 1974-09-13 | 1976-03-27 | Hitachi Ltd | DATSUSUISENTAKUKI |
JPS5278953A (en) * | 1975-12-26 | 1977-07-02 | Teijin Ltd | Polyester films |
JPS5278954A (en) * | 1975-12-26 | 1977-07-02 | Teijin Ltd | Polyester films |
JPS5341355A (en) * | 1976-09-29 | 1978-04-14 | Toray Ind Inc | Biaxilialy streched polyester film |
JPS5371154A (en) * | 1976-12-06 | 1978-06-24 | Toray Ind Inc | Biaxially oriented polyester film |
-
1978
- 1978-07-24 JP JP8937078A patent/JPS5515860A/en active Granted
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4921100A (en) * | 1972-06-16 | 1974-02-25 | ||
JPS5134272A (en) * | 1974-07-15 | 1976-03-23 | Celanese Corp | |
JPS5136779A (en) * | 1974-09-13 | 1976-03-27 | Hitachi Ltd | DATSUSUISENTAKUKI |
JPS5278953A (en) * | 1975-12-26 | 1977-07-02 | Teijin Ltd | Polyester films |
JPS5278954A (en) * | 1975-12-26 | 1977-07-02 | Teijin Ltd | Polyester films |
JPS5341355A (en) * | 1976-09-29 | 1978-04-14 | Toray Ind Inc | Biaxilialy streched polyester film |
JPS5371154A (en) * | 1976-12-06 | 1978-06-24 | Toray Ind Inc | Biaxially oriented polyester film |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5968213A (en) * | 1982-10-13 | 1984-04-18 | Toray Ind Inc | Biaxially stretched polyester film |
JPS59179555A (en) * | 1983-03-30 | 1984-10-12 | Teijin Ltd | Biaxially stretched polyester film |
JPH0141170B2 (en) * | 1983-03-30 | 1989-09-04 | Teijin Ltd | |
JPS6056531A (en) * | 1983-09-09 | 1985-04-02 | Toyobo Co Ltd | Oriented polyester film |
JPS6347738B2 (en) * | 1983-09-09 | 1988-09-26 | Toyo Boseki Kk | |
JPS6168727A (en) * | 1984-09-12 | 1986-04-09 | Teijin Ltd | Biaxially stretched polyester film |
JPS61177227A (en) * | 1985-02-04 | 1986-08-08 | Toyobo Co Ltd | Orientated polyester film |
JPH053377B2 (en) * | 1985-02-04 | 1993-01-14 | Toyo Boseki Kk | |
JPS63175222A (en) * | 1987-01-14 | 1988-07-19 | Teijin Ltd | Magnetic recording medium |
US5006589A (en) * | 1988-06-04 | 1991-04-09 | Diafoil Company, Limited | Polyester film for magnetic recording media |
JPH05301977A (en) * | 1991-09-17 | 1993-11-16 | Toyobo Co Ltd | Oriented polyester film |
Also Published As
Publication number | Publication date |
---|---|
JPS5734088B2 (en) | 1982-07-21 |
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