GB1091624A - Process for the production by slit extrusion of a sheet of a thermoplastic polymer - Google Patents

Process for the production by slit extrusion of a sheet of a thermoplastic polymer

Info

Publication number
GB1091624A
GB1091624A GB7522/66A GB752266A GB1091624A GB 1091624 A GB1091624 A GB 1091624A GB 7522/66 A GB7522/66 A GB 7522/66A GB 752266 A GB752266 A GB 752266A GB 1091624 A GB1091624 A GB 1091624A
Authority
GB
United Kingdom
Prior art keywords
roll
sheet
extrudate
heating
rolls
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
GB7522/66A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB1091624A publication Critical patent/GB1091624A/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
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/885—External treatment, e.g. by using air rings for cooling 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • 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

Landscapes

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

Abstract

1,091,624. Treating extruded sheets. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Feb. 21, 1966 [Feb. 22, 1965], No. 7522/66. Heading B5A. Thermoplastic polymer sheet material having a thickness greater than 7 mm. is made by extruding the polymer whilst hot through a slit die and passing the extrudate over cooling rolls such that the faces of the sheet are alternately cooled, and at at least one roll heating the face opposite that in contact with the roll. Two to five rolls may be utilized, their temperatures being adjusted to lie 10-50‹ C. below the temperature of the contacting extrudate. The rolls may have diameters within the range 20-60 cm. with generally a larger diameter roll being used for greater thickness extrudate. Heating may be effected by electrical means, gas burners or infra-red heaters, the latter being preferred, and it is also preferred that heating occur at the furthest downstream roll. The sheet may be drawn flat from this roll with or without use of support or guide rollers. Specific polymers mentioned are normal or low-pressure polyethylene, normal or isotactic polypropylene, P.V.C. and polystyrene. Four examples are given.
GB7522/66A 1965-02-22 1966-02-21 Process for the production by slit extrusion of a sheet of a thermoplastic polymer Expired GB1091624A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6502221A NL6502221A (en) 1965-02-22 1965-02-22

Publications (1)

Publication Number Publication Date
GB1091624A true GB1091624A (en) 1967-11-22

Family

ID=19792450

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7522/66A Expired GB1091624A (en) 1965-02-22 1966-02-21 Process for the production by slit extrusion of a sheet of a thermoplastic polymer

Country Status (4)

Country Link
BE (1) BE676784A (en)
DE (1) DE1629625A1 (en)
GB (1) GB1091624A (en)
NL (1) NL6502221A (en)

Also Published As

Publication number Publication date
BE676784A (en) 1966-08-22
DE1629625A1 (en) 1971-02-04
NL6502221A (en) 1966-08-23

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