GB741963A - Improvements in or relating to the production of films - Google Patents

Improvements in or relating to the production of films

Info

Publication number
GB741963A
GB741963A GB21273/53A GB2127353A GB741963A GB 741963 A GB741963 A GB 741963A GB 21273/53 A GB21273/53 A GB 21273/53A GB 2127353 A GB2127353 A GB 2127353A GB 741963 A GB741963 A GB 741963A
Authority
GB
United Kingdom
Prior art keywords
cooling liquid
tubular film
bath
inflated
film
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
GB21273/53A
Inventor
Richard Harold Barclay Buteux
Jack Witherington Cornforth
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
Priority to NL94153D priority Critical patent/NL94153C/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB21273/53A priority patent/GB741963A/en
Priority to CH323077D priority patent/CH323077A/en
Priority to US446124A priority patent/US2863172A/en
Priority to DEI8963A priority patent/DE1060133B/en
Priority to ES0216786A priority patent/ES216786A1/en
Publication of GB741963A publication Critical patent/GB741963A/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
    • B29C48/901—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
    • 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
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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
    • B29C48/903—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 externally
    • 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
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

<PICT:0741963/IV(a)/1> In a process for the downward extrusion of thermoplastic tubular film and reduction of its wall thickness by inflating and drawing, the inflated tube is passed through a passage-way of circular section, at least at its entrance, down the walls of which flows a cooling liquid in contact with the external surface of the tubular film. The cooling liquid is preferably supplied from a reservoir which surrounds the passageway and in addition the walls of the passageway may be hollow and be chilled by liquid circulating therethrough. Cold water or a refrigerant may be used as the cooling liquid. The films may be of linear superpolyamides and linear superpolyesters such as polyethylene terephthalate. As shown, a tubular film 2 is extruded from nozzle 1 and is inflated by air introduced through pipe 3. The inflated tube passes into a passage-way 6 bounded by wall 7 down the interior of which flows cooling liquid from bath 4. The wall 7 is surrounded by a barrier 8 having orifices 11 for the passage of cooling liquid, the height of the barrier being adjustable by means of its threaded mounting 10. The tubular film then passes between a pair of flat plates 12 hinged to the bottom of bath 4; the plates are of metal which may be highly polished, etched or coated with polytetrafluorethylene. The nip rollers 13 are driven at adjustable speed and one is preferably rubber coated. The flattened film is drawn off through a bath 15 having an adjustable outlet 16, although it is not necessary for bat 15 to contain any water, other than water entrained by the film. If desired, the tubular film may be slit by a knife before it reaches nip rollers 13, in which case the nip rollers and knife are immersed in the bath, the water pressure being sufficient to confine the air within the inflated portion of the tube.
GB21273/53A 1953-07-31 1953-07-31 Improvements in or relating to the production of films Expired GB741963A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL94153D NL94153C (en) 1953-07-31
GB21273/53A GB741963A (en) 1953-07-31 1953-07-31 Improvements in or relating to the production of films
CH323077D CH323077A (en) 1953-07-31 1954-07-22 Process for the production of a thin-walled hose
US446124A US2863172A (en) 1953-07-31 1954-07-27 Apparatus for production of films
DEI8963A DE1060133B (en) 1953-07-31 1954-07-28 Method and device for cooling a thin-walled tubular film made of thermoplastic material pressed from a melt
ES0216786A ES216786A1 (en) 1953-07-31 1954-07-31 A procedure and apparatus for the manufacture of tubular films of organic thermoplastic material (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB2863172X 1953-07-31
GB1106084X 1953-07-31
GB21273/53A GB741963A (en) 1953-07-31 1953-07-31 Improvements in or relating to the production of films

Publications (1)

Publication Number Publication Date
GB741963A true GB741963A (en) 1955-12-14

Family

ID=27257998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21273/53A Expired GB741963A (en) 1953-07-31 1953-07-31 Improvements in or relating to the production of films

Country Status (1)

Country Link
GB (1) GB741963A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955321A (en) * 1956-11-09 1960-10-11 Plax Corp Process and apparatus for manufacturing polyethylene tubing
US2987776A (en) * 1957-12-23 1961-06-13 Union Carbide Corp Method of biaxially stretching tubular styrene polymer film by inflating with gas and liquid
US3002430A (en) * 1957-06-19 1961-10-03 Lonza Electric & Chem Works Apparatus for continuous flattening of an extruded tube
DE1163005B (en) * 1957-06-19 1964-02-13 Lonza Ag Method and device for the production of film tubes made of thermoplastic material
CN109177113A (en) * 2018-10-29 2019-01-11 浙江嘉声环保科技有限公司 Use the molding equipment of TPU material production high leakproofness children guard bar aerated film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955321A (en) * 1956-11-09 1960-10-11 Plax Corp Process and apparatus for manufacturing polyethylene tubing
US3002430A (en) * 1957-06-19 1961-10-03 Lonza Electric & Chem Works Apparatus for continuous flattening of an extruded tube
DE1163005B (en) * 1957-06-19 1964-02-13 Lonza Ag Method and device for the production of film tubes made of thermoplastic material
US2987776A (en) * 1957-12-23 1961-06-13 Union Carbide Corp Method of biaxially stretching tubular styrene polymer film by inflating with gas and liquid
CN109177113A (en) * 2018-10-29 2019-01-11 浙江嘉声环保科技有限公司 Use the molding equipment of TPU material production high leakproofness children guard bar aerated film

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