JPS55123424A - Biaxially oriented plastic film and its preparation - Google Patents

Biaxially oriented plastic film and its preparation

Info

Publication number
JPS55123424A
JPS55123424A JP2941679A JP2941679A JPS55123424A JP S55123424 A JPS55123424 A JP S55123424A JP 2941679 A JP2941679 A JP 2941679A JP 2941679 A JP2941679 A JP 2941679A JP S55123424 A JPS55123424 A JP S55123424A
Authority
JP
Japan
Prior art keywords
tube
take
biaxially oriented
plastic film
copolymer
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
JP2941679A
Other languages
Japanese (ja)
Inventor
Masayuki Onohara
Kyosuke Miki
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 Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite 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 Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP2941679A priority Critical patent/JPS55123424A/en
Publication of JPS55123424A publication Critical patent/JPS55123424A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain title film which is used for heat shrinkage capping of vessels, easy to open and excellent in hermetical sealing, comprising more than a specific amount of ionomer resin obtained by the action of metallic ions on a copolymer of ethylene and methacrylic acid.
CONSTITUTION: Resin component containing at least 80wt% of ionomer which is obtained by the action of metallic ions on a copolymer of ethylene and methacrylic acid is heated and kneaded by an extruder, is extruded from a cylindrical die in a tubular shape and then the resin tube is made to expand by the difference of its own inner and outer pressure and to pass the air ring and is cooled by flowing the air of 25°C on lower onto the surface of the tube from the air holes circularly arranged. The tube is expanded until the blow rate becomes 4 or more and at the same time it is elongated in the take-off direction until the take-off rate becomes 4 or more. Then, the tube in pressed in the clearance of a couple of take-off rolls, to give biaxially oriented plastic film with a thickness of 5W80μ, heat shrinkage factor of more than 30% after 2sec at 120°C in both directions, and tensile strength of higher than 2kg/mm2 in both directions.
COPYRIGHT: (C)1980,JPO&Japio
JP2941679A 1979-03-15 1979-03-15 Biaxially oriented plastic film and its preparation Pending JPS55123424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2941679A JPS55123424A (en) 1979-03-15 1979-03-15 Biaxially oriented plastic film and its preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2941679A JPS55123424A (en) 1979-03-15 1979-03-15 Biaxially oriented plastic film and its preparation

Publications (1)

Publication Number Publication Date
JPS55123424A true JPS55123424A (en) 1980-09-22

Family

ID=12275517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2941679A Pending JPS55123424A (en) 1979-03-15 1979-03-15 Biaxially oriented plastic film and its preparation

Country Status (1)

Country Link
JP (1) JPS55123424A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104212049A (en) * 2014-08-26 2014-12-17 大连欧思特科技有限公司 Thermal shrinkable tube and preparation method thereof as well as application of thermal shrinkable tube in LED filament packaging

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128955A (en) * 1976-04-22 1977-10-28 Ube Industries Method and device for producing inflation film
JPS547475A (en) * 1977-06-21 1979-01-20 Sumitomo Bakelite Co Ltd Production of heat-shrinkable film

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128955A (en) * 1976-04-22 1977-10-28 Ube Industries Method and device for producing inflation film
JPS547475A (en) * 1977-06-21 1979-01-20 Sumitomo Bakelite Co Ltd Production of heat-shrinkable film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104212049A (en) * 2014-08-26 2014-12-17 大连欧思特科技有限公司 Thermal shrinkable tube and preparation method thereof as well as application of thermal shrinkable tube in LED filament packaging

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