GB1208032A - Apparatus for and a method of forming films - Google Patents

Apparatus for and a method of forming films

Info

Publication number
GB1208032A
GB1208032A GB20477/68A GB2047768A GB1208032A GB 1208032 A GB1208032 A GB 1208032A GB 20477/68 A GB20477/68 A GB 20477/68A GB 2047768 A GB2047768 A GB 2047768A GB 1208032 A GB1208032 A GB 1208032A
Authority
GB
United Kingdom
Prior art keywords
vacuum
ducts
casting
end portions
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
GB20477/68A
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.)
Fort James Corp
Original Assignee
Crown Zellerbach Corp
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 Crown Zellerbach Corp filed Critical Crown Zellerbach Corp
Publication of GB1208032A publication Critical patent/GB1208032A/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
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/916—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means using vacuum
    • 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
    • B29C48/911—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1,208,032. Film casting apparatus. CROWN ZELLERBACH CORP. 30 April, 1968 [31 July, 1967], No. 20477/68. Heading B5B. In a casting device wherein a continuous stream of film-forming material, e.g. polyethylene, is fed from a slot 6 on to a moving casting surface 3 and a vacuum is applied to the trailing face 9 of the material, the suction pressure across the width of the material is balanced by means comprising two independent ducts 41, one at each end portion of the material, each duct being connected to a source of vacuum for withdrawing air which has infiltered behind the material at these end portions and whereby the space between the ducts is in indirect communication with the vacuum only through the end portions. A moving casting-belt may be used instead of the roller illustrated. A pad 28 may be provided to prevent ingress of air from the rear. The ducts may be provided with independent dampers 43.
GB20477/68A 1967-07-31 1968-04-30 Apparatus for and a method of forming films Expired GB1208032A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65709467A 1967-07-31 1967-07-31

Publications (1)

Publication Number Publication Date
GB1208032A true GB1208032A (en) 1970-10-07

Family

ID=24635791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20477/68A Expired GB1208032A (en) 1967-07-31 1968-04-30 Apparatus for and a method of forming films

Country Status (6)

Country Link
US (1) US3520964A (en)
JP (1) JPS4818105B1 (en)
DE (1) DE1779318B2 (en)
FR (1) FR1574357A (en)
GB (1) GB1208032A (en)
NL (1) NL6810862A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1469983A (en) * 1974-08-07 1977-04-14 Ici Ltd Polymeric film production
US4111625A (en) * 1974-08-07 1978-09-05 Imperial Chemical Industries Limited Polymeric film production
US4310295A (en) * 1981-01-28 1982-01-12 E. I. Du Pont De Nemours And Company Device for uniform web pinning
US4501712A (en) * 1982-08-20 1985-02-26 E. I. Du Pont De Nemours And Company Vacuum pinning of molten thermoplastic film to a roughened casting roll
FR2698580B1 (en) * 1992-12-01 1995-02-24 Albert Plastiques Device for pressing the film leaving a flat die onto a cooling cylinder.
US5607726A (en) * 1994-10-17 1997-03-04 E. I. Du Pont De Nemours And Company Process for the preparation of composite coatings with variable thickness
US5618568A (en) * 1995-02-01 1997-04-08 Extrusion Dies, Inc. Dual-chamber vacuum box
JP3442985B2 (en) 1997-12-26 2003-09-02 三菱重工業株式会社 Casting equipment for resin thin film molding
JP3938640B2 (en) * 1999-07-07 2007-06-27 富士フイルム株式会社 Solution casting method
US7011881B2 (en) * 2000-07-25 2006-03-14 Fuji Photo Film Co., Ltd. Polymer resin film and its production
JP4588233B2 (en) * 2000-07-25 2010-11-24 富士フイルム株式会社 Film deposition equipment
CN1910029A (en) * 2004-01-23 2007-02-07 纳幕尔杜邦公司 Polyvinylbutyral rolls having thick edges relative to the interior of the roll and a process for preparing same
US9492332B2 (en) * 2014-05-13 2016-11-15 Clopay Plastic Products Company, Inc. Breathable and microporous thin thermoplastic film
KR20230017318A (en) * 2015-07-10 2023-02-03 베리 글로벌 인코포레이티드 Microporous breathable film and method of making the microporous breathable film
MX2018005624A (en) 2015-11-05 2018-09-05 Berry Global Inc Polymeric films and methods for making polymeric films.
US11472085B2 (en) * 2016-02-17 2022-10-18 Berry Plastics Corporation Gas-permeable barrier film and method of making the gas-permeable barrier film
US11584111B2 (en) 2018-11-05 2023-02-21 Windmoeller & Hoelscher Kg Breathable thermoplastic film with reduced shrinkage
DE102019119505A1 (en) 2019-07-18 2021-01-21 Brückner Maschinenbau GmbH & Co. KG Method and device for producing a melt and / or plastic film

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE513714A (en) * 1951-08-23 1900-01-01
FR1359130A (en) * 1962-12-10 1964-04-24 Crown Zellerbach Corp Apparatus and method for controlling the deposition of film-forming plastic

Also Published As

Publication number Publication date
FR1574357A (en) 1969-07-11
DE1779318A1 (en) 1972-05-10
DE1779318C3 (en) 1973-10-11
US3520964A (en) 1970-07-21
JPS4818105B1 (en) 1973-06-04
NL6810862A (en) 1969-02-04
DE1779318B2 (en) 1973-03-22

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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