JPS5688437A - Production of packaging film having high elastic modulus - Google Patents

Production of packaging film having high elastic modulus

Info

Publication number
JPS5688437A
JPS5688437A JP16474279A JP16474279A JPS5688437A JP S5688437 A JPS5688437 A JP S5688437A JP 16474279 A JP16474279 A JP 16474279A JP 16474279 A JP16474279 A JP 16474279A JP S5688437 A JPS5688437 A JP S5688437A
Authority
JP
Japan
Prior art keywords
film
heat
temp
temperature
extruded
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
JP16474279A
Other languages
Japanese (ja)
Other versions
JPS6044121B2 (en
Inventor
Hiroyo Oshima
Koichi Nagai
Yukio Kobayashi
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.)
Jujo Paper Co Ltd
Original Assignee
Jujo Paper 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 Jujo Paper Co Ltd filed Critical Jujo Paper Co Ltd
Priority to JP54164742A priority Critical patent/JPS6044121B2/en
Publication of JPS5688437A publication Critical patent/JPS5688437A/en
Publication of JPS6044121B2 publication Critical patent/JPS6044121B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Wrappers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

PURPOSE:To obtain the titled film in which Young's modulus is remarkably improved, by a method wherein a low-density PE having a specified heat-resisting temperature is extruded into a film at a resin temperature not lower than a specified temperature, and the extruded PE film is heat-treated in an unstreched state. CONSTITUTION:A low-density ethylene polymer having a heat-resisting temp. of 107-118 deg.C and a density of 0.925-0.939, or a copolymer of ethylene with an alpha- olefin and composed mainly of ethylene, is extruded into a film at a resin temp. of not lower than 260 deg.C. The resulting polyethylene film is left to stand in an unstreched state at a temperature which is 70-10 deg.C lower than the above heat-resisting temperature, or at a temp. of 40-95 deg.C for 1sec-15 days in order to heat- treat the polyethylene film. For example, a lap film-rolled package packed in a corrugated box is left to stand at a temp. of 40-70 deg.C for 2-15 days. Alternatively, a single-layer film is heat-treated in an oven kept at a temp. of 80-95 deg.C by an infrared heater, etc. for 1-50sec. The titled film having excellent transparency and remarkably improved Young's modulus can be produced at low cost with good productivity.
JP54164742A 1979-12-20 1979-12-20 Manufacturing method of high elastic modulus film for packaging Expired JPS6044121B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54164742A JPS6044121B2 (en) 1979-12-20 1979-12-20 Manufacturing method of high elastic modulus film for packaging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54164742A JPS6044121B2 (en) 1979-12-20 1979-12-20 Manufacturing method of high elastic modulus film for packaging

Publications (2)

Publication Number Publication Date
JPS5688437A true JPS5688437A (en) 1981-07-17
JPS6044121B2 JPS6044121B2 (en) 1985-10-02

Family

ID=15799037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54164742A Expired JPS6044121B2 (en) 1979-12-20 1979-12-20 Manufacturing method of high elastic modulus film for packaging

Country Status (1)

Country Link
JP (1) JPS6044121B2 (en)

Also Published As

Publication number Publication date
JPS6044121B2 (en) 1985-10-02

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