GB1515968A - Method of shaping tubular film - Google Patents

Method of shaping tubular film

Info

Publication number
GB1515968A
GB1515968A GB32455/76A GB3245576A GB1515968A GB 1515968 A GB1515968 A GB 1515968A GB 32455/76 A GB32455/76 A GB 32455/76A GB 3245576 A GB3245576 A GB 3245576A GB 1515968 A GB1515968 A GB 1515968A
Authority
GB
United Kingdom
Prior art keywords
mandrel
tube
outlet
diameter
die
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.)
Expired
Application number
GB32455/76A
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.)
Idemitsu Petrochemical Co Ltd
Original Assignee
Idemitsu Petrochemical 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 Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Publication of GB1515968A publication Critical patent/GB1515968A/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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • 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
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • 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

Landscapes

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

Abstract

1515968 High molecular weight film by extrusion IDEMITSU PETROCHEMICAL Co Ltd 4 Aug 1976 [7 Aug 1975] 32455/76 Heading B5A A tubular film of high molecular weight, high density polyethylene material, is produced by the internal air pressure inflation of a tube of the material extruded from the annular outlet of a die 1, the tube passing to the location of inflation around a mandrel having a reduced diameter portion adjacent the die, and having a bore 2 for the passage of the inflating air from the die, and contact between the tube and mandrel is prevented by a plurality of holes 4 at the smaller diameter end of the mandrel, through which air is drawn by the aspirating effect of the extruding tube to flow in the extrusion direction between the tube and the mandrel. The end of the mandrel adjacent the extrusion outlet is of a smaller external diameter than the inner diameter of the outlet, and the diameter of the remainder of the mandrel may be the same, or slightly less, or slightly greater than the inner diameter of the outlet. The tube is also externally cooled by an air ring 7. Results are given of comparative tests relating to thickness deviation, and tear and impact strength, of 10 micron film.
GB32455/76A 1975-08-07 1976-08-04 Method of shaping tubular film Expired GB1515968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50095382A JPS5219762A (en) 1975-08-07 1975-08-07 Method of forming tubular film

Publications (1)

Publication Number Publication Date
GB1515968A true GB1515968A (en) 1978-06-28

Family

ID=14136083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32455/76A Expired GB1515968A (en) 1975-08-07 1976-08-04 Method of shaping tubular film

Country Status (6)

Country Link
JP (1) JPS5219762A (en)
DE (1) DE2631631A1 (en)
GB (1) GB1515968A (en)
HK (1) HK42879A (en)
MY (1) MY7900167A (en)
ZA (1) ZA764207B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523856Y2 (en) * 1975-10-09 1980-06-07
JPS5429329Y2 (en) * 1976-02-18 1979-09-18
US4204819A (en) * 1978-03-06 1980-05-27 Idemitsu Petrochemical Co. Ltd. Shaping apparatus for tubular film
DE2811254C2 (en) * 1978-03-15 1987-01-02 Idemitsu Petrochemical Co., Ltd., Tokio/Tokyo Device for forming synthetic polyolefin resins
JPS5559930A (en) * 1978-10-31 1980-05-06 Idemitsu Petrochem Co Ltd Resin bubble stabilizing body
SE437490B (en) * 1982-10-18 1985-03-04 Unifos Kemi Ab PROCEDURES FOR CONTINUOUS FILM BLASTING OF LINER THERMOPLASTIC MATERIAL
DE3676393D1 (en) * 1985-08-12 1991-02-07 Mitsui Petrochemical Ind BLOW FILM AND METHOD AND DEVICE FOR PRODUCING THE SAME.
CN114013016A (en) * 2021-12-03 2022-02-08 锐励生物科技(杭州)有限公司 Extrusion molding machine for density-reducing full-biodegradable film

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS552180B2 (en) * 1972-10-06 1980-01-18
JPS51102053A (en) * 1975-03-06 1976-09-09 Showa Yuka Kk INFUREESHONFUIRUMUNOSEIZOHOHO

Also Published As

Publication number Publication date
ZA764207B (en) 1977-08-31
HK42879A (en) 1979-07-06
JPS5219762A (en) 1977-02-15
MY7900167A (en) 1979-12-31
DE2631631A1 (en) 1977-02-10
JPS5546296B2 (en) 1980-11-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19960803