JPS57156222A - Preparation of polyolefin film - Google Patents

Preparation of polyolefin film

Info

Publication number
JPS57156222A
JPS57156222A JP4266981A JP4266981A JPS57156222A JP S57156222 A JPS57156222 A JP S57156222A JP 4266981 A JP4266981 A JP 4266981A JP 4266981 A JP4266981 A JP 4266981A JP S57156222 A JPS57156222 A JP S57156222A
Authority
JP
Japan
Prior art keywords
film
polyolefin film
rolling
temperature
softening point
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
JP4266981A
Other languages
Japanese (ja)
Inventor
Atsuro Nishikawa
Hirosuke Togawa
Akimoto Shirai
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP4266981A priority Critical patent/JPS57156222A/en
Publication of JPS57156222A publication Critical patent/JPS57156222A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment

Abstract

PURPOSE:To obtain the polyolefin film excellent in moisture proof and strength equibrium in the biaxial directions of length and width by stretching polyolefin film twice or more in the lateral direction and then rolling it three times or more in the longitudinal direction. CONSTITUTION:The polyolefin film such as polyethylene film, polypropylene film, ethylene-propylene copolymer film, etc. is stretched two times or more in the lateral direction at the crystallization initiating temperature or the softening point or higher and then rolled three times or more in the longitudinal direction to obtain the desired polyolefin film. The rolling is preferred to be carried out by a method wherein the resin film is allowed to pass between a pair of rolls, the rolls keep the room temperature or more and the crystallization inititiating temperature or the softening point of the resin or less.
JP4266981A 1981-03-23 1981-03-23 Preparation of polyolefin film Pending JPS57156222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4266981A JPS57156222A (en) 1981-03-23 1981-03-23 Preparation of polyolefin film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4266981A JPS57156222A (en) 1981-03-23 1981-03-23 Preparation of polyolefin film

Publications (1)

Publication Number Publication Date
JPS57156222A true JPS57156222A (en) 1982-09-27

Family

ID=12642424

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4266981A Pending JPS57156222A (en) 1981-03-23 1981-03-23 Preparation of polyolefin film

Country Status (1)

Country Link
JP (1) JPS57156222A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148127A (en) * 1979-05-09 1980-11-18 Showa Denko Kk Manufacture of polypropylene sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148127A (en) * 1979-05-09 1980-11-18 Showa Denko Kk Manufacture of polypropylene sheet

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