JPS56111639A - Production of cylindrical thermo-shrinkable film - Google Patents

Production of cylindrical thermo-shrinkable film

Info

Publication number
JPS56111639A
JPS56111639A JP1508680A JP1508680A JPS56111639A JP S56111639 A JPS56111639 A JP S56111639A JP 1508680 A JP1508680 A JP 1508680A JP 1508680 A JP1508680 A JP 1508680A JP S56111639 A JPS56111639 A JP S56111639A
Authority
JP
Japan
Prior art keywords
cylindrical
film
cylindrical film
shrinkable film
production
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
JP1508680A
Other languages
Japanese (ja)
Inventor
Shigemitsu Nemoto
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP1508680A priority Critical patent/JPS56111639A/en
Publication of JPS56111639A publication Critical patent/JPS56111639A/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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE:To provide the titled film which is uniform without having such defects as ribs and creases in the circumferential direction thereof, by sealing a gas into a cylindrical film discontinuously. CONSTITUTION:A raw material resin 1 is fed from a hopper 7, is melted by heating, is fed in the direction of arrow 8, is extruded from a circular die part 2 and the cylindrical film is stretched by feeding compressed air from a feeding part 3 into the inside of the cylindrical film. Then, the air in the cylindrical film is sealed discontinuously by moving heating rollers 6 in the direction of arrows 11, thereby obtaining the objective cylindrical thermo-shrinkable film 9.
JP1508680A 1980-02-08 1980-02-08 Production of cylindrical thermo-shrinkable film Pending JPS56111639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1508680A JPS56111639A (en) 1980-02-08 1980-02-08 Production of cylindrical thermo-shrinkable film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1508680A JPS56111639A (en) 1980-02-08 1980-02-08 Production of cylindrical thermo-shrinkable film

Publications (1)

Publication Number Publication Date
JPS56111639A true JPS56111639A (en) 1981-09-03

Family

ID=11879025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1508680A Pending JPS56111639A (en) 1980-02-08 1980-02-08 Production of cylindrical thermo-shrinkable film

Country Status (1)

Country Link
JP (1) JPS56111639A (en)

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