JPS5759717A - Preparation of biaxially oriented polyester film - Google Patents
Preparation of biaxially oriented polyester filmInfo
- Publication number
- JPS5759717A JPS5759717A JP13439280A JP13439280A JPS5759717A JP S5759717 A JPS5759717 A JP S5759717A JP 13439280 A JP13439280 A JP 13439280A JP 13439280 A JP13439280 A JP 13439280A JP S5759717 A JPS5759717 A JP S5759717A
- Authority
- JP
- Japan
- Prior art keywords
- film
- gripped
- oriented
- biaxially oriented
- traverse
- 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
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE:To obtain a highly uniformly film of which various physical properties are balanced in a longitudinal and traverse directions by forcedly advancing the film in such a condition that only central narrow part of the longitudinally and traversely oriented film is gripped by nip rolls while both side ends of said film is gripped. CONSTITUTION:In preparing a biaxially oriented film by a method wherein a thermoplastic polyester film (e.g.; a polyethylene terephthalate film or the like) uniaxially oriented to a longitudinal direction is oriented to a traverse direction by a tenter and, further, subjected to heat treatment, while both sides ends of the film after traverse orientation is completed are gripped by a gripping means of the tenter, only a narrow part in the vicinity of a central part of the film is gripped by nip rollers to impart advancement drive action to said central part of the film and, thereby, a process so as to forcedly advance said central part is added. By adding said process, bowing phenomenon can be eliminated (or reduced) and the biaxially oriented polyester film with uniform physical properties is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13439280A JPS5759717A (en) | 1980-09-29 | 1980-09-29 | Preparation of biaxially oriented polyester film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13439280A JPS5759717A (en) | 1980-09-29 | 1980-09-29 | Preparation of biaxially oriented polyester film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5759717A true JPS5759717A (en) | 1982-04-10 |
| JPS6324459B2 JPS6324459B2 (en) | 1988-05-20 |
Family
ID=15127322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13439280A Granted JPS5759717A (en) | 1980-09-29 | 1980-09-29 | Preparation of biaxially oriented polyester film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5759717A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139131A (en) * | 1983-01-12 | 1984-08-09 | Diafoil Co Ltd | Polyester film for magnetic disk |
| JP2013010309A (en) * | 2011-06-30 | 2013-01-17 | Nippon Zeon Co Ltd | Method of manufacturing film |
-
1980
- 1980-09-29 JP JP13439280A patent/JPS5759717A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139131A (en) * | 1983-01-12 | 1984-08-09 | Diafoil Co Ltd | Polyester film for magnetic disk |
| JPH0413135B2 (en) * | 1983-01-12 | 1992-03-06 | Daiafoil | |
| JP2013010309A (en) * | 2011-06-30 | 2013-01-17 | Nippon Zeon Co Ltd | Method of manufacturing film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6324459B2 (en) | 1988-05-20 |
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