JPS54148864A - Manufacture of tubular film consisting of foamed and transparent films - Google Patents

Manufacture of tubular film consisting of foamed and transparent films

Info

Publication number
JPS54148864A
JPS54148864A JP5809778A JP5809778A JPS54148864A JP S54148864 A JPS54148864 A JP S54148864A JP 5809778 A JP5809778 A JP 5809778A JP 5809778 A JP5809778 A JP 5809778A JP S54148864 A JPS54148864 A JP S54148864A
Authority
JP
Japan
Prior art keywords
film
manufacture
tubular film
foamed
coextrusion
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
JP5809778A
Other languages
Japanese (ja)
Inventor
Nobuo Fukushima
Takayoshi Adachi
Kazuaki Sakakura
Hiroo Totani
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 JP5809778A priority Critical patent/JPS54148864A/en
Publication of JPS54148864A publication Critical patent/JPS54148864A/en
Pending 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/507—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through an annular die

Abstract

PURPOSE:To manufacture the title tubular film having improved strength and appearance, by laminating a low foamable polyethylene film or a transparent thermoplastic resin film with a coextrusion coloring film die, and by extruding the laminate. CONSTITUTION:A low foamable polyethylene resin containing a chemical blowing agent or N2 gas is fed from the inlet 3 to the channel 6 separated by the partition walls 5; a transparent thermoplastic resin, from the inlet 4 to the channel 7. The resins are jointed on the mandrel surface 1 before the outlet 10 of the coextrusion coloring film die, laminated into a tubular film, extruded from the outlet 10 under atmospheric pressure to foam the polyethylene film, anf quenched.
JP5809778A 1978-05-15 1978-05-15 Manufacture of tubular film consisting of foamed and transparent films Pending JPS54148864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5809778A JPS54148864A (en) 1978-05-15 1978-05-15 Manufacture of tubular film consisting of foamed and transparent films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5809778A JPS54148864A (en) 1978-05-15 1978-05-15 Manufacture of tubular film consisting of foamed and transparent films

Publications (1)

Publication Number Publication Date
JPS54148864A true JPS54148864A (en) 1979-11-21

Family

ID=13074444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5809778A Pending JPS54148864A (en) 1978-05-15 1978-05-15 Manufacture of tubular film consisting of foamed and transparent films

Country Status (1)

Country Link
JP (1) JPS54148864A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000992A (en) * 1989-06-01 1991-03-19 The Dow Chemical Company Coextruded multilayer foamed film for plastic container closures and process for manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000992A (en) * 1989-06-01 1991-03-19 The Dow Chemical Company Coextruded multilayer foamed film for plastic container closures and process for manufacture

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