GB1523629A - Apparatus for producing polymeric film - Google Patents

Apparatus for producing polymeric film

Info

Publication number
GB1523629A
GB1523629A GB48592/75A GB4859275A GB1523629A GB 1523629 A GB1523629 A GB 1523629A GB 48592/75 A GB48592/75 A GB 48592/75A GB 4859275 A GB4859275 A GB 4859275A GB 1523629 A GB1523629 A GB 1523629A
Authority
GB
United Kingdom
Prior art keywords
thickness
cooling
film
width
heating
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
GB48592/75A
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.)
Teijin Ltd
Original Assignee
Teijin 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 claimed from JP49135565A external-priority patent/JPS5161562A/en
Priority claimed from JP49135564A external-priority patent/JPS5759050B2/ja
Priority claimed from JP49144555A external-priority patent/JPS5171361A/en
Application filed by Teijin Ltd filed Critical Teijin Ltd
Publication of GB1523629A publication Critical patent/GB1523629A/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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
    • B29C48/313—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections by positioning the die lips
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92152—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92314—Particular value claimed
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92571—Position, e.g. linear or angular
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92809—Particular value claimed
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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

Abstract

1523629 Regulating the thickness of extruded film TEIJIN Ltd 26 Nov 1975 [27 Nov 1974 (2) 18 Dec 1974] 48592/75 Heading B5A Thickness unevenness across the width of a polymeric film being extruded from an outlet passage 32 between lips 30 of a die 31, is reduced by heating the material being delivered to the outlet 32 to a substantially constant temperature by means of a die heater 33, and altering the temperature of the material at a location or locations across the width of the outlet 32 corresponding to deviations from a required film thickness, the temperature alteration being effected by independently operable heating and cooling means which are located in passages, e.g. 35, equally spaced apart across the width of the outlet 32, and which are actuated to add heat to increase the thickness, and remove heat to reduce the thickness. The heater 33 may be a fluid medium, or an electric heater. The heating and cooling means are provided in one or more, e.g. three, 34, 35, 36, straight, or zig-zag rows, and the thickness of the extruding film is continuously measured across its width by a detector, e.g. a γ-ray detector. In the Fig. 1 embodiment, the means 40 each comprise an electric heater 43 having peripheral grooves 42 and a central hole 41 for the circulation of cooling air, e.g. at room temperature, and each means 40 may simultaneously be heated and cooled with the adjustment effected by altering the relative heating and cooling, by reducing or terminating the heating or cooling, or increasing the cooling, i.e. the rate of air flow. In the Fig. 6 embodiment, a heat transfer medium, e.g. air, vapours, or silicone oil is delivered through each passage 35 by a pump 52, with adjustment effected by altering the temperature of the medium by a heater 51. The film may comprise various specified polymers, and the examples relate to biaxially stretched and heat-set polyethylene terephthalate, with the film thicknesses detected at width locations by a #-ray detector, and with average-thickness unevenness assessed by a γ-ray tester.
GB48592/75A 1974-11-27 1975-11-26 Apparatus for producing polymeric film Expired GB1523629A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP49135565A JPS5161562A (en) 1974-11-27 1974-11-27 Jugotaifuirumuno seizohoho
JP49135564A JPS5759050B2 (en) 1974-11-27 1974-11-27
JP49144555A JPS5171361A (en) 1974-12-18 1974-12-18 Jugotaifuirumuno seizohoho

Publications (1)

Publication Number Publication Date
GB1523629A true GB1523629A (en) 1978-09-06

Family

ID=27317105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48592/75A Expired GB1523629A (en) 1974-11-27 1975-11-26 Apparatus for producing polymeric film

Country Status (5)

Country Link
BR (1) BR7507892A (en)
CA (1) CA1060172A (en)
DE (1) DE2553069C3 (en)
FR (1) FR2292570A1 (en)
GB (1) GB1523629A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1190834A3 (en) * 2000-09-26 2003-12-03 Toray Industries, Inc. Sheet manufacturing method and sheet manufacturing die
EP2607050A1 (en) * 2011-12-19 2013-06-26 The Goodyear Tire & Rubber Company System and method for rubber component extrusion

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950003C2 (en) * 1979-12-12 1983-08-11 Windmöller & Hölscher, 4540 Lengerich Process for regulating the film thickness on a blown film extruder
DE3002903C2 (en) * 1980-01-28 1986-12-04 Windmöller & Hölscher, 4540 Lengerich Method for controlling the film thickness on a blown film extruder
DE3006566A1 (en) * 1980-02-21 1981-08-27 Windmöller & Hölscher, 4540 Lengerich METHOD FOR REGULATING THE FILM THICKNESS OF FLAT FILMS PRODUCED IN FLAT FILM EXTRUSION PLANTS
US8124241B2 (en) 2006-03-01 2012-02-28 Kaneka Corporation Process for producing multilayer polymide film

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341388A (en) * 1964-05-20 1967-09-12 Phillips Petroleum Co Method and apparatus for the uniform extruding of thermoplastic film
US3761553A (en) * 1971-06-28 1973-09-25 Celanese Corp Method for producing uniform drawn films
DE2232930A1 (en) * 1971-07-06 1973-02-01 Hepworth Plastics Ltd METHOD AND DEVICE FOR THE PRODUCTION OF PIPES OF EQUAL WALL THICKNESS IN THE EXTRUSION PROCESS
NL7109900A (en) * 1971-07-16 1973-01-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1190834A3 (en) * 2000-09-26 2003-12-03 Toray Industries, Inc. Sheet manufacturing method and sheet manufacturing die
EP2607050A1 (en) * 2011-12-19 2013-06-26 The Goodyear Tire & Rubber Company System and method for rubber component extrusion

Also Published As

Publication number Publication date
FR2292570A1 (en) 1976-06-25
FR2292570B1 (en) 1978-05-12
DE2553069B2 (en) 1980-08-14
DE2553069A1 (en) 1976-08-12
BR7507892A (en) 1976-08-10
CA1060172A (en) 1979-08-14
DE2553069C3 (en) 1981-05-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee