JPS55118832A - Method of making thermoplastic resin film - Google Patents

Method of making thermoplastic resin film

Info

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
Application number
JP2596779A
Other languages
Japanese (ja)
Other versions
JPS6142624B2 (en
Inventor
Takahiko Kazama
Saburo Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP2596779A priority Critical patent/JPS55118832A/en
Publication of JPS55118832A publication Critical patent/JPS55118832A/en
Publication of JPS6142624B2 publication Critical patent/JPS6142624B2/ja
Granted legal-status Critical Current

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
JP2596779A 1979-03-06 1979-03-06 Method of making thermoplastic resin film Granted JPS55118832A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237659U (en) * 1975-09-10 1977-03-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237659U (en) * 1975-09-10 1977-03-17

Cited By (4)

* Cited by examiner, † Cited by third party
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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