JPS5595532A - Manufacture of composite film - Google Patents

Manufacture of composite film

Info

Publication number
JPS5595532A
JPS5595532A JP280179A JP280179A JPS5595532A JP S5595532 A JPS5595532 A JP S5595532A JP 280179 A JP280179 A JP 280179A JP 280179 A JP280179 A JP 280179A JP S5595532 A JPS5595532 A JP S5595532A
Authority
JP
Japan
Prior art keywords
film
composite film
temperature
olefin
polypropylene
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
Application number
JP280179A
Other languages
Japanese (ja)
Inventor
Hiroshi Kyohara
Mamoru Furuko
Nobuo Suzui
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 JP280179A priority Critical patent/JPS5595532A/en
Publication of JPS5595532A publication Critical patent/JPS5595532A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE: To prevent film from tacking to the winding shaft roll or the like by a method wherein the composite film composed of polypropylene as the base and the α-olefin copolymerizate as the laminated body is extended under the specific temperature and rapidly cooled.
CONSTITUTION: The composite film for which the 10W60μ thick polypropylene base is laminated with the 0.5W10μ thick α-olefin inter polymer is biaxially extended under the temperature between the polypropylene melting peak temperature or less and the α-olefin inter polymer melting peak temperature or more. Next thereto, the film is made to contact with a revolving material such as a roll or the like which is cool at the α-olefin inter polymer crystallization end temperature or less, and rapidly cooled preferably for 0.4W0.5 seconds to obtain the composite byaxial extended film.
EFFECT: This increases the composite film clarity and improves the heat seal capacity.
USE: For foodstuffs packing, etc.
COPYRIGHT: (C)1980,JPO&Japio
JP280179A 1979-01-12 1979-01-12 Manufacture of composite film Pending JPS5595532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP280179A JPS5595532A (en) 1979-01-12 1979-01-12 Manufacture of composite film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP280179A JPS5595532A (en) 1979-01-12 1979-01-12 Manufacture of composite film

Publications (1)

Publication Number Publication Date
JPS5595532A true JPS5595532A (en) 1980-07-19

Family

ID=11539469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP280179A Pending JPS5595532A (en) 1979-01-12 1979-01-12 Manufacture of composite film

Country Status (1)

Country Link
JP (1) JPS5595532A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5221345U (en) * 1975-08-01 1977-02-15
JPS52104585A (en) * 1976-02-28 1977-09-02 Gunze Kk Heat sealable bi axial oriented film
JPS52125586A (en) * 1976-02-28 1977-10-21 Gunze Kk Bi axial oriented composite film having good low temperature heat seal property
JPS5537400A (en) * 1978-09-06 1980-03-15 British Serofuan Ltd Heat sealable propylene film
JPS5563229A (en) * 1978-11-02 1980-05-13 Toyobo Co Ltd Method of manufacturing film excellent in transparency

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5221345U (en) * 1975-08-01 1977-02-15
JPS52104585A (en) * 1976-02-28 1977-09-02 Gunze Kk Heat sealable bi axial oriented film
JPS52125586A (en) * 1976-02-28 1977-10-21 Gunze Kk Bi axial oriented composite film having good low temperature heat seal property
JPS5537400A (en) * 1978-09-06 1980-03-15 British Serofuan Ltd Heat sealable propylene film
JPS5563229A (en) * 1978-11-02 1980-05-13 Toyobo Co Ltd Method of manufacturing film excellent in transparency

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