JPS5455072A - Method of biaxial orentation of tubular polyhexamethylene adipamide film - Google Patents
Method of biaxial orentation of tubular polyhexamethylene adipamide filmInfo
- Publication number
- JPS5455072A JPS5455072A JP12137777A JP12137777A JPS5455072A JP S5455072 A JPS5455072 A JP S5455072A JP 12137777 A JP12137777 A JP 12137777A JP 12137777 A JP12137777 A JP 12137777A JP S5455072 A JPS5455072 A JP S5455072A
- Authority
- JP
- Japan
- Prior art keywords
- film
- tubular
- drawn
- polyhexamethylene adipamide
- stretching
- 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
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE: The stretching of films is conducted in such a way that the shape and size of tubular film under drawing is kept in a specific range to produce titly biaxially orented tubluler films with uniformity especially uneveness-free transparency.
CONSTITUTION: A tubular undrawn film of polyhexamethylene adipamide is biaxially oriented at the same time by stretching in the film-advancing direction and the traverse direction in which the shape of the film is kept so that parameter may satisfy 2,5≤α<8. α is the value obtained by dividing the length 1 between the point where the drawing starts and the point where the film is drawn by 50% along the center axis of the drawn bubble with the quarter of a value 2r obtained by subtracting the diameter of undrawn film from the diameter of drawn film when the drawing in the axis direction. The drawing is conducted preferably at 70W180°C and draw ratios of 2.5W4 respectively in the longitudinal and traverse direction
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12137777A JPS6023979B2 (en) | 1977-10-12 | 1977-10-12 | Tubular biaxial stretching method for polyhexamethylene adipamide film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12137777A JPS6023979B2 (en) | 1977-10-12 | 1977-10-12 | Tubular biaxial stretching method for polyhexamethylene adipamide film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5455072A true JPS5455072A (en) | 1979-05-01 |
| JPS6023979B2 JPS6023979B2 (en) | 1985-06-10 |
Family
ID=14809713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12137777A Expired JPS6023979B2 (en) | 1977-10-12 | 1977-10-12 | Tubular biaxial stretching method for polyhexamethylene adipamide film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6023979B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0593026U (en) * | 1991-12-16 | 1993-12-17 | 阪神エレクトリック株式会社 | Closed magnetic circuit type ignition coil |
-
1977
- 1977-10-12 JP JP12137777A patent/JPS6023979B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0593026U (en) * | 1991-12-16 | 1993-12-17 | 阪神エレクトリック株式会社 | Closed magnetic circuit type ignition coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6023979B2 (en) | 1985-06-10 |
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