JPS55118832A - Method of making thermoplastic resin film - Google Patents
Method of making thermoplastic resin filmInfo
- Publication number
- JPS55118832A JPS55118832A JP2596779A JP2596779A JPS55118832A JP S55118832 A JPS55118832 A JP S55118832A JP 2596779 A JP2596779 A JP 2596779A JP 2596779 A JP2596779 A JP 2596779A JP S55118832 A JPS55118832 A JP S55118832A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- resins
- thermoplastic resin
- film
- piping
- 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 enable making of film having no break age occurring near both ends, by a mthod wherein a transverse stretching is performed in such a condition as grasps a resin portion, having a heavier average molecular weight, of a composite film made of two types of thermoplastic resins having different molecular weights from each other.
CONSTITUTION: A molten thermoplastic resin A, such as polyester, polyethylene, is fed to a piping 1, a molten thermoplastic resin B, having an average molecular weight whose ultimate viscosity is 1.05W2.0 fold higher than that of the resin A, being supplied to a piping 2. A part or the whole of the resin B is laminated on the resin A by extruding said resins theough a mouth ring 3, the resins so laminated being cooled in a casting drum 4 to form a composite film 7 such that a central portion thereof consists of the resin A and both end portions thereof consist of the resin B. The film 7 is then fed to a grasping means of a stretching device where both side portions, each of which is situated further inward from the edge in arrange of from 150W220 or less mm, are grasped, and the resin A at least is stretched transversely.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2596779A JPS55118832A (en) | 1979-03-06 | 1979-03-06 | Method of making thermoplastic resin film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2596779A JPS55118832A (en) | 1979-03-06 | 1979-03-06 | Method of making thermoplastic resin film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55118832A true JPS55118832A (en) | 1980-09-12 |
JPS6142624B2 JPS6142624B2 (en) | 1986-09-22 |
Family
ID=12180492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2596779A Granted JPS55118832A (en) | 1979-03-06 | 1979-03-06 | Method of making thermoplastic resin film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55118832A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6174821A (en) * | 1984-09-20 | 1986-04-17 | Mitsui Toatsu Chem Inc | Manufacture of highly-oriented film in traverse direction |
JPH11254521A (en) * | 1998-03-13 | 1999-09-21 | Teijin Ltd | Manufacture of film |
JP2009160900A (en) * | 2008-01-10 | 2009-07-23 | Nitto Denko Corp | Method for manufacturing stretched film |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5237659U (en) * | 1975-09-10 | 1977-03-17 |
-
1979
- 1979-03-06 JP JP2596779A patent/JPS55118832A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5237659U (en) * | 1975-09-10 | 1977-03-17 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6174821A (en) * | 1984-09-20 | 1986-04-17 | Mitsui Toatsu Chem Inc | Manufacture of highly-oriented film in traverse direction |
JPH0363499B2 (en) * | 1984-09-20 | 1991-10-01 | Mitsui Toatsu Chemicals | |
JPH11254521A (en) * | 1998-03-13 | 1999-09-21 | Teijin Ltd | Manufacture of film |
JP2009160900A (en) * | 2008-01-10 | 2009-07-23 | Nitto Denko Corp | Method for manufacturing stretched film |
Also Published As
Publication number | Publication date |
---|---|
JPS6142624B2 (en) | 1986-09-22 |
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