JPS5483070A - Preparation of drawn film excellent in simultaneous sealing and cutting - Google Patents

Preparation of drawn film excellent in simultaneous sealing and cutting

Info

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
Application number
JP15093877A
Other languages
Japanese (ja)
Other versions
JPS5525967B2 (en
Inventor
Nobuo Fukushima
Takayoshi Adachi
Haruo Hayashida
Kazuaki Sakakura
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP15093877A priority Critical patent/JPS5483070A/en
Publication of JPS5483070A publication Critical patent/JPS5483070A/en
Publication of JPS5525967B2 publication Critical patent/JPS5525967B2/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 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
JP15093877A 1977-12-14 1977-12-14 Preparation of drawn film excellent in simultaneous sealing and cutting Granted JPS5483070A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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