JPS54138068A - Polyimide film - Google Patents
Polyimide filmInfo
- Publication number
- JPS54138068A JPS54138068A JP4549478A JP4549478A JPS54138068A JP S54138068 A JPS54138068 A JP S54138068A JP 4549478 A JP4549478 A JP 4549478A JP 4549478 A JP4549478 A JP 4549478A JP S54138068 A JPS54138068 A JP S54138068A
- Authority
- JP
- Japan
- Prior art keywords
- polyimide film
- formula
- processability
- improved
- 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
Links
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE: To prepare a poliymide film having improved adhesivity, processability, and alkali resistance, and useful for a wide variety of applications, by uniaxially orienting a specific polyimide film under specific conditions.
CONSTITUTION: A polyimide film of formula I (R is organic residue of formula II; n ≥ 0) is prepared by the thermal or chemical cyclization of a polyamide-acid film obtained by the reaction of pyromellitic anhydride with 4, 4'-diaminodiphenyl ether. The polyimide film obtained above is stretched uniaxially at 50W420°C under the tension of ≥ 1000 kg/cm2 at a draw ratio of ≥ 1.05 to obtain the objective polyimide film having a refractive index of ≥ 2.1 along the direction of the drawing, extremely improved stiffness, increased low temperature heat shrinkability, and consequently improved processability.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4549478A JPS54138068A (en) | 1978-04-18 | 1978-04-18 | Polyimide film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4549478A JPS54138068A (en) | 1978-04-18 | 1978-04-18 | Polyimide film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54138068A true JPS54138068A (en) | 1979-10-26 |
Family
ID=12720946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4549478A Pending JPS54138068A (en) | 1978-04-18 | 1978-04-18 | Polyimide film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54138068A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4886573A (en) * | 1986-08-27 | 1989-12-12 | Hitachi, Ltd. | Process for forming wiring on substrate |
-
1978
- 1978-04-18 JP JP4549478A patent/JPS54138068A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4886573A (en) * | 1986-08-27 | 1989-12-12 | Hitachi, Ltd. | Process for forming wiring on substrate |
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