JPS5483070A - Preparation of drawn film excellent in simultaneous sealing and cutting - Google Patents
Preparation of drawn film excellent in simultaneous sealing and cuttingInfo
- Publication number
- JPS5483070A JPS5483070A JP15093877A JP15093877A JPS5483070A JP S5483070 A JPS5483070 A JP S5483070A JP 15093877 A JP15093877 A JP 15093877A JP 15093877 A JP15093877 A JP 15093877A JP S5483070 A JPS5483070 A JP S5483070A
- Authority
- JP
- Japan
- Prior art keywords
- film
- shrinkability
- heat
- softening point
- cutting
- 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: To prepare a drawn film having excellent transparency, gas barrier characteristics, mechanical strength, and sealing and cutting properties, by transversally shrinking a film by heating, and drawing the shrinked film by passing through pressure rolls at a temperature belos the softening point and a specific rate of neck-down.
CONSTITUTION: A thermoplastic film or sheet having a transversal heat-shrinkability of 10%, is uniaxially oriented by passing through one or more pairs of pressure rolls at a temperature below the softening point of the film. The neckdown rate, which can be obtained by experiment, is controlled to ≤1/2 of the heat-shrinkability of the film. When the heat-shrinkability of the film is lower than 10%, the transversal heat expansion is not cancelled, and when the drawing temperature is higher than the softening point, the heat shrinkability relaxes before drawing, and the effect of neck-down at the drawing cannot be cancelled.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15093877A JPS5483070A (en) | 1977-12-14 | 1977-12-14 | Preparation of drawn film excellent in simultaneous sealing and cutting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15093877A JPS5483070A (en) | 1977-12-14 | 1977-12-14 | Preparation of drawn film excellent in simultaneous sealing and cutting |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5483070A true JPS5483070A (en) | 1979-07-02 |
JPS5525967B2 JPS5525967B2 (en) | 1980-07-10 |
Family
ID=15507685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15093877A Granted JPS5483070A (en) | 1977-12-14 | 1977-12-14 | Preparation of drawn film excellent in simultaneous sealing and cutting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5483070A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5777533A (en) * | 1980-10-31 | 1982-05-14 | Toyobo Co Ltd | Heat-shrinkable film |
JPH03114727A (en) * | 1989-09-29 | 1991-05-15 | Idemitsu Kosan Co Ltd | Manufacture of stretched article |
-
1977
- 1977-12-14 JP JP15093877A patent/JPS5483070A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5777533A (en) * | 1980-10-31 | 1982-05-14 | Toyobo Co Ltd | Heat-shrinkable film |
JPH0132248B2 (en) * | 1980-10-31 | 1989-06-30 | Toyo Boseki | |
JPH03114727A (en) * | 1989-09-29 | 1991-05-15 | Idemitsu Kosan Co Ltd | Manufacture of stretched article |
Also Published As
Publication number | Publication date |
---|---|
JPS5525967B2 (en) | 1980-07-10 |
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