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GB1083842A - Improvements in and relating to organic thermoplastic films - Google Patents

Improvements in and relating to organic thermoplastic films

Info

Publication number
GB1083842A
GB1083842A GB12400/63A GB1240063A GB1083842A GB 1083842 A GB1083842 A GB 1083842A GB 12400/63 A GB12400/63 A GB 12400/63A GB 1240063 A GB1240063 A GB 1240063A GB 1083842 A GB1083842 A GB 1083842A
Authority
GB
United Kingdom
Prior art keywords
film
liquid metal
metal
extruded
bath
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
GB12400/63A
Inventor
Edward Henry Harbard
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.)
Smith & Nephew
TJ Smith and Nephew Ltd
Original Assignee
Smith & Nephew
TJ Smith and Nephew 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 Smith & Nephew, TJ Smith and Nephew Ltd filed Critical Smith & Nephew
Priority to GB12400/63A priority Critical patent/GB1083842A/en
Publication of GB1083842A publication Critical patent/GB1083842A/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
    • B29C48/919—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
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. 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
    • B29C48/03—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
    • 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

Landscapes

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

Abstract

1,083,842. Films. T. J. SMITH & NEPHEW Ltd. May 27, 1964 [March 28, 1963], No. 12400/63. Heading B5B. A molten organic thermoplastic film is cooled by passing it, immediately it is formed by extrusion, into contact with a liquid metal or metal alloy maintained at a temperature at least 10‹ C. below the softening point of the film. The film may be immersed in the liquid metal or contacted therewith on one surface only for a period sufficient to bring the film to the " frozen " condition. The metal, e.g. Wood's metal, mercury or mercury alloys may be maintained at a desired temperature by surrounding it with a coil containing water. In one embodiment (Fig. 1) (not shown) a film (6) extruded from (5) is passed by driven rollers (7, 8) and guides (12, 13, 16) along the surface of a bath of liquid metal (11) maintained at the desired temperature by means of heated water circulating in jacket (9). The " frozen " film is withdrawn at (14). Alternatively, the extruded film is immersed in the liquid metal. The driven rollers or guides may be formed from or coated with polytetrafluorethylene. In a further embodiment (Fig. 3) (not shown) a tubular film extruded from die (20) is contacted on its inner surface by a sleeve of polytetrafluorethylene (25) and on its outer surface by a surrounding bath of liquid metal (22) contained by sleeve (21). Water-carrying coil (23) maintains the metal at the desired temperature. Alternatively, the tubular film is contacted on both inner and outer surfaces by the liquid metal bath (Fig. 4) (not shown) which is circulated by a system containing a pump (33) and a heater (34). The invention enables cooling of an extruded and blown tubular film to be commenced immediately the molten material leaves the die.
GB12400/63A 1963-03-28 1963-03-28 Improvements in and relating to organic thermoplastic films Expired GB1083842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB12400/63A GB1083842A (en) 1963-03-28 1963-03-28 Improvements in and relating to organic thermoplastic films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12400/63A GB1083842A (en) 1963-03-28 1963-03-28 Improvements in and relating to organic thermoplastic films

Publications (1)

Publication Number Publication Date
GB1083842A true GB1083842A (en) 1967-09-20

Family

ID=10003889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12400/63A Expired GB1083842A (en) 1963-03-28 1963-03-28 Improvements in and relating to organic thermoplastic films

Country Status (1)

Country Link
GB (1) GB1083842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166064A (en) * 1984-09-29 1986-04-30 Jeol Ltd Forming a thin film or crystal
EP0195540A3 (en) * 1985-03-18 1988-08-10 Mobil Oil Corporation Process for producing oriented polyolefin films having enhanced physical properties

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166064A (en) * 1984-09-29 1986-04-30 Jeol Ltd Forming a thin film or crystal
GB2166064B (en) * 1984-09-29 1989-05-24 Jeol Ltd Method of preparing a thin crystal or film
EP0195540A3 (en) * 1985-03-18 1988-08-10 Mobil Oil Corporation Process for producing oriented polyolefin films having enhanced physical properties

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