GB903794A - Improvements in and relating to a method for the manufacture of organic thermoplastic tubular film and products resulting therefrom - Google Patents

Improvements in and relating to a method for the manufacture of organic thermoplastic tubular film and products resulting therefrom

Info

Publication number
GB903794A
GB903794A GB4334/60A GB433460A GB903794A GB 903794 A GB903794 A GB 903794A GB 4334/60 A GB4334/60 A GB 4334/60A GB 433460 A GB433460 A GB 433460A GB 903794 A GB903794 A GB 903794A
Authority
GB
United Kingdom
Prior art keywords
probe
air
perforations
film
pressure
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
GB4334/60A
Inventor
Terence Martin Euling
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB4334/60A priority Critical patent/GB903794A/en
Priority to DEJ19370A priority patent/DE1170613B/en
Priority to FR852039A priority patent/FR1282813A/en
Publication of GB903794A publication Critical patent/GB903794A/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
    • B29C48/03—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 Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

<PICT:0903794/IV(a)/1> <PICT:0903794/IV(a)/2> An apparatus for the production of organic thermoplastic tubular film (which may subsequently, if desired, be slit to convert it into flat film) comprises a die 3 having an annular orifice 2 through which organic thermoplastic material is extruded in the form of a tube 1, quenched by means not shown, and then passed in a partially collapsed state between nip rolls 4. A tubular probe 5 mounted on the die 3 projects through the nip of the rolls 4 and has perforations at 6. Air issues from the perforations 6 to form an air cushion between the probe 5 and the shaped grooves 7 in the nip rolls 4. The grooved portions of the nip rolls are formed from a resilient material such as sponge rubber. The film 8 assumes a lenticular shape on its passage between the nip rolls and the perforated part 6 of the tubular probe 5 is also so shaped. Air from the air cushion escapes into the space 11 between the die and the nip rolls, the pressure in this space being controlled by an exit pipe 9. The pressure at 10 is greater than that in the space 11 and is used to inflate the film in the drawing stage, but the pressure at 10 is less than that inside the probe at the perforations 6. This is brought about by restricting the opening at the end of the probe 12 and also allowing the air in the drawing bubble controllably to escape. When higher air cushion pressures are needed, as in the case of polypropylene film manufacture, a separate air supply may be provided for the perforations. For example, the interior of the probe may be provided with a second air supply pipe for supply of air under moderate pressure to the space 10, while supplying air to the perforations at a higher pressure through an outer channel in the probe. The second air supply pipe and the probe are then sealed into each other at the end of the probe so that air from the outer channel does not escape to the space 10. In either case the air discharged through the perforations 6 reduces contact pressure between the tubular film and the probe 5 so that scratching of the tubular film is reduced. Specifications 787,479 and 843,113 are referred to.
GB4334/60A 1960-02-08 1960-02-08 Improvements in and relating to a method for the manufacture of organic thermoplastic tubular film and products resulting therefrom Expired GB903794A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4334/60A GB903794A (en) 1960-02-08 1960-02-08 Improvements in and relating to a method for the manufacture of organic thermoplastic tubular film and products resulting therefrom
DEJ19370A DE1170613B (en) 1960-02-08 1961-02-01 Device for introducing a gaseous medium into the inner space of a tubular film made of thermoplastic plastic, which is limited by a pair of rollers
FR852039A FR1282813A (en) 1960-02-08 1961-02-08 Film manufacturing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4334/60A GB903794A (en) 1960-02-08 1960-02-08 Improvements in and relating to a method for the manufacture of organic thermoplastic tubular film and products resulting therefrom

Publications (1)

Publication Number Publication Date
GB903794A true GB903794A (en) 1962-08-22

Family

ID=9775218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4334/60A Expired GB903794A (en) 1960-02-08 1960-02-08 Improvements in and relating to a method for the manufacture of organic thermoplastic tubular film and products resulting therefrom

Country Status (2)

Country Link
DE (1) DE1170613B (en)
GB (1) GB903794A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2815287A1 (en) * 2000-10-18 2002-04-19 Sedepro MANUFACTURE OF A STRIP BY EXTRUSION OF A TUBE THEN FLATTENING THE TUBE
CN111071512A (en) * 2020-01-19 2020-04-28 多科智能装备（常熟）有限公司 Low-fluidity fluid material filling limiting device and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10115259C1 (en) * 2001-03-28 2002-10-02 Kiefel Extrusion Gmbh Air turning bar

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT198510B (en) * 1955-06-03 1958-07-10 Ici Ltd Process for the continuous production or treatment of tubular film

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2815287A1 (en) * 2000-10-18 2002-04-19 Sedepro MANUFACTURE OF A STRIP BY EXTRUSION OF A TUBE THEN FLATTENING THE TUBE
EP1199148A1 (en) * 2000-10-18 2002-04-24 Société de Technologie Michelin Manufacturing a strip by extruding a tube and then flattening said tube
US6666940B2 (en) 2000-10-18 2003-12-23 Michelin Recherche Et Technique S.A. Manufacture of a strip by extrusion of a tube then flattening the tube
US6957677B2 (en) 2000-10-18 2005-10-25 Michelin Recherche Et Technique S.A. Manufacture of a strip by extrusion of a tube then flattening the tube
CN111071512A (en) * 2020-01-19 2020-04-28 多科智能装备（常熟）有限公司 Low-fluidity fluid material filling limiting device and method
CN111071512B (en) * 2020-01-19 2024-04-16 多科智能装备（常熟）有限公司 Filling limiting device and method for low-fluidity fluid materials

Also Published As

Publication number Publication date
DE1170613B (en) 1964-05-21

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