JPS54134781A - Ultra-heavy gage biaxially oriented polypropylene film - Google Patents

Ultra-heavy gage biaxially oriented polypropylene film

Info

Publication number
JPS54134781A
JPS54134781A JP4209778A JP4209778A JPS54134781A JP S54134781 A JPS54134781 A JP S54134781A JP 4209778 A JP4209778 A JP 4209778A JP 4209778 A JP4209778 A JP 4209778A JP S54134781 A JPS54134781 A JP S54134781A
Authority
JP
Japan
Prior art keywords
polypropylene film
biaxially oriented
pref
oriented polypropylene
ultra
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
JP4209778A
Other languages
Japanese (ja)
Inventor
Kenji Tsunashima
Takeo Fukuyama
Seizo Aoki
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 JP4209778A priority Critical patent/JPS54134781A/en
Publication of JPS54134781A publication Critical patent/JPS54134781A/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 provide the title polypropylene film having excellent transparency, mechanical properties, flatness, electrical properties, moisture barrier characteristics, etc., characterized by the particular cleavage index, orientation coefficient to the b-direction, and thickness. CONSTITUTION:For example, 2-20 sheets of biaxially oriented polypropylene film are stacked each other, and temporarily bonded by heating at 100-140 deg.C under tension while evaculating the air between each layer. The temporarily bonded films are firmly bonded by pressing at 140-155 deg.C under a linear pressure of >=25 kg/cm. The polypropylene film thus obtained has a cleavage index of 1-20 pref. 0-10; an orientation coefficient to the b-axis direction (cos<2>phib z) of >=0.65, pref.>=0.72; and a film thickness of >=mum, pref.>=260mum.
JP4209778A 1978-04-12 1978-04-12 Ultra-heavy gage biaxially oriented polypropylene film Pending JPS54134781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4209778A JPS54134781A (en) 1978-04-12 1978-04-12 Ultra-heavy gage biaxially oriented polypropylene film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4209778A JPS54134781A (en) 1978-04-12 1978-04-12 Ultra-heavy gage biaxially oriented polypropylene film

Publications (1)

Publication Number Publication Date
JPS54134781A true JPS54134781A (en) 1979-10-19

Family

ID=12626483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4209778A Pending JPS54134781A (en) 1978-04-12 1978-04-12 Ultra-heavy gage biaxially oriented polypropylene film

Country Status (1)

Country Link
JP (1) JPS54134781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017186561A (en) * 2016-04-05 2017-10-12 サンアロマー株式会社 Polypropylene sheet, molded body thereof and manufacturing method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017186561A (en) * 2016-04-05 2017-10-12 サンアロマー株式会社 Polypropylene sheet, molded body thereof and manufacturing method therefor

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