US3347962A - Method and apparatus for casting a liquid composition - Google Patents

Method and apparatus for casting a liquid composition Download PDF

Info

Publication number
US3347962A
US3347962A US476401A US47640165A US3347962A US 3347962 A US3347962 A US 3347962A US 476401 A US476401 A US 476401A US 47640165 A US47640165 A US 47640165A US 3347962 A US3347962 A US 3347962A
Authority
US
United States
Prior art keywords
casting
stream
liquid composition
roll
chamber
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 - Lifetime
Application number
US476401A
Other languages
English (en)
Inventor
William W Dieck
Joseph S Rengert
Dean E Winkler
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US476401A priority Critical patent/US3347962A/en
Priority to JP41021045A priority patent/JPS4936946B1/ja
Priority to GB33003/66A priority patent/GB1146549A/en
Priority to DE19661629393 priority patent/DE1629393B1/de
Application granted granted Critical
Publication of US3347962A publication Critical patent/US3347962A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B29C48/30—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
    • B29C48/88—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 drums

Definitions

  • the present invention relates to a method and apparatus for continuously casting a liquid composition into a thin sheet, and more particularly to a method and apparatus in which the air pressureon one side of the stream of liquid composition being cast is reduced to a subatmospheric pressure to increase the intimacy of contact between the stream of liquid composition and the casting surface.
  • Such vibrations are imparted to the air drawn into the apparatus on the side of the stream of liquid composition at which a sub-atmospheric air pressure is being main: tained, thereby causing the formation of cross lines or corrugations.
  • the frequency of the cross lines or corrugations corresponds substantially to the vibration frequency.
  • the cross lines or corrugations so formed impair the appearance of the sheeting or film to such an extent that its value might be reduced or that it is useless for its intended purpose. To eliminate such vibrations and the I consequent cross lines and corrugations would require that the apparatus be completely free of vibration and would not be economically feasible.
  • One object of the invention is the provision of means for enhancing intimate contact between a stream of liquid composition and the roll or material on which the composition is being cast.
  • Another object of the invention is the provision of means for creating a sub-atmospheric air pressure on the side of a flowing stream of liquid composition that engages a casting surface, the air pressure differential being created by withdrawing the air in at least two chambers to increase the intimacy of contact between the composition and the casting surface.
  • Still another object of the invention is the provision of means for creating an air pressure differential with respect to the sides of a stream of liquid composition that is being flowed onto a roll or material by withdrawing the air on one side of the stream in at least two chambers so as to reduce the air turbulence and vibration in the chamber adjacent the stream, thereby assuring intimate contact of the stream of liquid composition with a roll or material on which the composition is being cast and substantially inimizing the formation of cross lines and corrugations.
  • the above and other objects of the invention are attained by creating a sub-atmospheric pressure, or partial vacuum, on the side of a flowing stream of liquid composition that contacts a rotatable roll, or a material, being moved past an extrusion die for applying the composition.
  • a housing which is made as a removable part, is mounted adjacent the extrusion die and ahead of the line of application of the liquid compositions in the direction of movement of the roll or material.
  • Each of a pair of chambers, one of which can be formed in the extrusion dies and the other of which is part of the housing having an opening which faces the casting surface, that is, the roll or material, the chambers being interconnected and one of the chambers being connected to a vacuum source.
  • An adjustable bafile is positioned ahead of the housing in the direction of movement of the roll and is spaced from the peripheral surface of the roll to provide a slot for regulating the amount of air drawn into the chambers. A large portion of this air is withdrawn through a first chamber so that the air turbulence and vibration in the chamber adjacent to the line of application of the liquid composition to the roll is substantially decreased. With only a small amount of air flowing through the chamber adjacent the stream of liquid composition, it has been found that vibration of the apparatus has substantially no effect on the air in this chamber, so that cross lines and corrugations are practically eliminated. Also, with this arrangement more intimate contact between the stream of liquid composition and the roll, or material is obtained, so that the peripheral speed of the roll can be increased by a relatively large factor.
  • FIG. 1 is a vertical section through apparatus embodyinga preferred form of the invention and showing the structure of an extrusion die and the arrangement of a vacuum chamber relative to the station at which the liquid composition is applied to a roll;
  • FIG. 2 is a partial vertical section similar to FIG. 1 showing another embodiment of a vacuum chamber.
  • an extrusion die 10 comprises a pair of plates 11 and 12 which are held in assembled relation by a plurality of screws 13.
  • the extrusion die 10 is spaced from and extends transversely of a casting roll 15 that is driven continuously, by means not shown, in a direction indicated by arrow 16.
  • a central opening 18 formed in plates 11 and 12 is connected by a slot 19 to a pair of lips 20 and 21, the lip 20 being spaced from the surface of roll 15 by a distance greater than the thickness of the sheet being cast and can be of the order of 0.002 inch to 0.500 inch.
  • the lip 20 is formed by a plate 22 that is secured in the end of plate 11 by screws 23 and a bar 24 that is secured in 3 position on plate 11 by screws 25.
  • the plate 12 is provided with a chamber or recess 30 that extends substantially the width of roll and has an opening at the side facing roll 15, the ends 31 of chamber 30 being closed.
  • a housing 33 is secured to plate 12 by screws 34 and 34'-and is provided with a chamber 35 that is co-extensive with an opening 36 that terminates at the roll 15.
  • the chamber 30 and chamber 35 extend transversely of the roll 15 and are connected by a plurality of openings 37 that are spaced from the roll 15 substantially as shown in FIG. 1.
  • One or both of the ends 38 of housing 33 is provided with an opening 39 that is connected by a conduit 40 to a fan 41 that is driven by a motor 42 for a purpose to be described hereinafter.
  • An angular member 45 is secured to housing 33, as shown in FIG. 1 and carries a plurality of spaced adjusting screws 46 that engage a baffle means 47.
  • the bafile means 47 comprises a resilient channel-shaped member 48 that is fixed to housing 33 and carries a strip 49 of pliable material that is capable of withstanding extrusion temperatures, the strip 49 being secured by screws 50 and a strip 51 to member 48.
  • chamber 30 and opening 36 to chamber 35 are spaced from each other and ahead of the station of application 55 in the direction of movement of roll 15.
  • the bottom surface 56 of plate 12, as well as the bottom surface 57 of the housing 33 and the bottom surface 58 of angular member 48 are spaced from the peripheral surface of roll 15 by a distance of 0.002 inch to 0.500 inch depending on the thickness of the sheeting being cast.
  • the liquid composition that is introduced into the extrusion die 10 via one or more inlets 69 connected to opening 18 flows by gravity, or under pressure through slot 19 and at lips and 21 is applied to the peripheral surface of roll 15.
  • a negative pressure or sub-atmospheric pressure
  • This negative pressure can range between 0.1 and 30 inches of water and removes the air that might otherwise become entrapped between the stream of liquid composition and the peripheral surface of the roll 15.
  • the negative pressure therefore draws the sheet of liquid composition into intimate contact with the peripheral surface of roll 15. Since the baffle means 47 can be adjusted relative to the peripheral surface of roll 15 by means of screw 46, the amount of air drawn through the slot formed by strip 49 can be regulated to provide an optimum condition in accordance with the liquid composition that is being applied to roll 15.
  • the housing 65 is provided with an extension 66 that includes the chamber 30 and openings 37 so that the housing 65 is an integral member having two chambers and cooperating with plate 12 to form a structure similar to that shown in FIG. 1. While the embodiments shown in FIGS. 1 and 2 comprise a chamber 30 and chamber 35, additional chambers can be provided ahead of those shown in the direction of movement of the roll 15 for bypassing the air drawn under the baffle 47.
  • the invention as disclosed above is applicable to the casting of polyolefin films and sheeting, as well as those of polystyrene, polycarbonate, etc. Whether the liquid composition is applied to a chill roll or a heated roll the same intimate contact of the liquid composition to the peripheral surface of the roll 15 is obtained.
  • the invention is also applicable to the coating of a film on a surface of a web of material which can be moved past the lips 20 and 21 in the same manner as the peripheral surface of roll 15.
  • cast and casting are meant to define the formation of unitary, continuous sheeting by applying a flowing stream of a liquid composition to a surface of a continuously moving member from which the sheeting is subsequently removed, and the coating of a surface of a moving web of material with a flowing stream of liquid composition that subsequently becomes a part of the material.
  • EXAMPLE I This example shows the speed at which polyethylene sheeting can be cast without any pressure differential existing on the sides of the stream of liquid composition applied to the casting surface.
  • Pellets of polyethylene were first melted and then introduced into the extrusion die at a temperature of 510 F. This melt was applied to the casting roll which was rotated at a linear speed of 16 ft./min. and maintained at a temperature of F.
  • the extrusion die was positioned relative to the peripheral surface of the casting roll to cast a film 0.005 inch thick. With no air pressure differential, the linear speed of the casting roll was determined by the rate at which the melt could be applied to the roll without forming bubbles and puckers caused by air becoming entrapped between the melt and the surface of the casting roll.
  • EXAMPLE II To cast polyethylene sheeting of the same thickness, namely 0.005 inch, as in Example I, the polyethylene pellets were melted and then introduced into the extrusion die at a temperature of 525 F. The casting roll was rotated at a linear speed of 37 ft./rnin. and maintained at a temperature F. A pressure differential of 12 inches of water was maintained on the sides of the stream of polyethylene with the use of two chambers in accordance with this invention. The linear speed of the casting roll was determined primarily by the melting capacity of the extruder that feeds the liquid polyethylene to the extrusion die, the speed being more than twice that of the previous example.
  • EXAMPLE III In casting a film of polypropylene 0.0048 inch thick, the polypropylene was introduced into the extrusion die at a temperature of 520 F. The casting roll was rotated at a linear speed of 35 ft./min. and maintained at a tem perature of F. A pressure differential of 12 inches of water, by using the method of this invention under similar conditions of vibration, provided intimate contact of the stream of polypropylene with the casting surface without the formation of cross lines or corrugations. As in the previous example, the linear speed of the casting roll was determined primarily by the melting capacity of the extruder which supplies the liquid polypropylene to the extrusion die.
  • EXAMPLE IV In casting a film of polycarbonate 0.0055. inch thick, polycarbonate pellets are melted and supplied to the extrusion die at a temperature of 590 F. The casting roll was rotated at a linear speed of 26 ft./min. and maintained at a temgfla't liq of 245 F. A pressure. differential of 20 inches of water was maintained on the sides of the stream of polycarbonate, using the method of this invention under conditions of vibration similar to those of Examples II and III. Intimate contact between the stream of polycarbonate and the surface of the casting roll was obtained without the formation of cross lines or cor'rugations in the resulting sheeting. As in the previous examples, the linear speed of the casting roll is determined by the rate which the melt can be fed to the extrusion die.
  • a casting apparatus having a movable casting surface; extruding means having a slot extending transversely of the direction of movement of said casting surface and spaced from the latter for applying a free and continuous stream of liquid composition to said casting surface; and a first chamber having an opening facing said casting surface that is substantially parallel to and arranged ahead of said slot in said direction of movement; the improvement which comprises:
  • At least one other chamber having an opening facing said casting surface and arranged substantially parallel to and ahead of said opening in said first chamber in said direction of movement; and means connected to said chambers for establishing a gas pressure at the side of said stream of liquid composition adjacent said first chamber that is less than that at the other side; whereby the turbulence and vibration of the gas in said first chamber is decreased and the intimacy of contact of said stream of liquid composition with said casting surface is increased.
  • a member arranged contiguous to and ahead of said extruding means in said direction of movement and extending transversely of the latter; said member comprising a first chamber arranged substantially parallel to and ahead of said slot in said direction of movement and having an opening facing said casting surface, and a second chamber arranged substantially parallel to and ahead of said first chamber in said direction of movement and having an opening facing said casting surface, said first chamber being connected to said second chamber by a plurality of spaced openings;
  • baffle means arranged ahead of said second chamber in said direction of movement and movable relative to said casting surface to provide a transverse adjust able slot for regulating the air drawn into said chambers;
  • Casting apparatus in accordance with claim 7 including means arranged on said member and coupled to said baflle means for moving the latter relative to said casting surface.
  • ROBERT F. WHITE Primary Examiner.
  • A. R. NOE Assistant Examiner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulding By Coating Moulds (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US476401A 1965-08-02 1965-08-02 Method and apparatus for casting a liquid composition Expired - Lifetime US3347962A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US476401A US3347962A (en) 1965-08-02 1965-08-02 Method and apparatus for casting a liquid composition
JP41021045A JPS4936946B1 (enrdf_load_stackoverflow) 1965-08-02 1966-04-05
GB33003/66A GB1146549A (en) 1965-08-02 1966-07-22 Casting a liquid composition
DE19661629393 DE1629393B1 (de) 1965-08-02 1966-07-29 Verfahren zum herstellen von folienbahnen und vorrichtung zur durchfuehrung des verfahrens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US476401A US3347962A (en) 1965-08-02 1965-08-02 Method and apparatus for casting a liquid composition

Publications (1)

Publication Number Publication Date
US3347962A true US3347962A (en) 1967-10-17

Family

ID=23891681

Family Applications (1)

Application Number Title Priority Date Filing Date
US476401A Expired - Lifetime US3347962A (en) 1965-08-02 1965-08-02 Method and apparatus for casting a liquid composition

Country Status (4)

Country Link
US (1) US3347962A (enrdf_load_stackoverflow)
JP (1) JPS4936946B1 (enrdf_load_stackoverflow)
DE (1) DE1629393B1 (enrdf_load_stackoverflow)
GB (1) GB1146549A (enrdf_load_stackoverflow)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735729A (en) * 1970-09-24 1973-05-29 Eastman Kodak Co Apparatus for coating a continuous web
US3773452A (en) * 1970-05-12 1973-11-20 J Taga Apparatus for molding thermoplastic materials
US3852392A (en) * 1972-12-18 1974-12-03 Borden Inc Method of removing plasticizer mist from air
JPS5141053A (enrdf_load_stackoverflow) * 1974-08-07 1976-04-06 Ici Ltd
FR2391835A1 (fr) * 1976-08-27 1978-12-22 Ibm France Procede d'extrusion de film plastique, dispositif mettant en oeuvre ledit procede, film plastique produit et application notamment a la fabrication de rubans encreurs
US4145173A (en) * 1976-04-05 1979-03-20 Saint-Gobain Industries Film-forming head
US4174200A (en) * 1976-12-10 1979-11-13 Tetra Pak Developpement Sa Apparatus for the manufacture of a continuous film or web of thermoplastic material
US4310295A (en) * 1981-01-28 1982-01-12 E. I. Du Pont De Nemours And Company Device for uniform web pinning
DE3309343A1 (de) * 1983-03-16 1984-09-20 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Vorrichtung zum auftragen mindestens einer giessschicht
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
US4610745A (en) * 1985-02-01 1986-09-09 Kimberly-Clark Corporation Method and apparatus for applying hot melt pressure sensitive adhesive to a heat sensitive web
US4867924A (en) * 1988-04-22 1989-09-19 The Budd Company Method and apparatus for compression molding under vacuum
US4917844A (en) * 1987-04-01 1990-04-17 Fuji Photo Film Co., Ltd. Method of manufacturing laminate product
US4988471A (en) * 1989-09-15 1991-01-29 Sano, Inc. Apparatus and method of forming a continuous layer of thermoplastic material
US5162070A (en) * 1990-04-20 1992-11-10 A-Z Formen- Und Maschinenbau Gmbh Binding rubber extruder
FR2698580A1 (fr) * 1992-12-01 1994-06-03 Albert Plastiques Dispositif pour plaquer sur un cylindre de refroidissement le film sortant d'une filière plate.
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
US6168412B1 (en) 1997-12-26 2001-01-02 Mitsubishi Heavy Industries, Ltd. Casting apparatus for formation of resin-made membrane
US6273704B1 (en) * 1997-04-21 2001-08-14 Mitsubishi Heavy Industries, Ltd. Casting apparatus for formation of resin-made membrane
US20060192317A1 (en) * 2005-02-25 2006-08-31 Paulson Jack E Method and apparatus for drying coated sheet material
US20080191376A1 (en) * 2005-03-07 2008-08-14 Fujifilm Corporation Solution Casting Method
US20130020737A1 (en) * 2011-07-20 2013-01-24 Extrusion Dies Industries, Llc Sculpted extrusion die
US20160052191A1 (en) * 2014-08-20 2016-02-25 Tredegar Film Products Corporation Formed Films, Methods And Apparatus For Manufacturing Same, And Articles Comprising Same
US20170129228A1 (en) * 2015-11-05 2017-05-11 Berry Plastics Corporation 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
US11872740B2 (en) 2015-07-10 2024-01-16 Berry Plastics Corporation Microporous breathable film and method of making the microporous breathable film

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7011881B2 (en) * 2000-07-25 2006-03-14 Fuji Photo Film Co., Ltd. Polymer resin film and its production
JP2002160241A (ja) * 2000-11-28 2002-06-04 Toray Ind Inc 樹脂フィルムの製造装置および製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625785A (enrdf_load_stackoverflow) * 1962-12-10 1900-01-01
US2688155A (en) * 1953-03-16 1954-09-07 Eastman Kodak Co Apparatus and method for controlling the application of plastic material to casting surfaces of sheeting machines
US3112528A (en) * 1960-12-27 1963-12-03 Eastman Kodak Co Method and apparatus for prevention of slug formation in the casting of film support and sheeting

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE513714A (enrdf_load_stackoverflow) * 1951-08-23 1900-01-01

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2688155A (en) * 1953-03-16 1954-09-07 Eastman Kodak Co Apparatus and method for controlling the application of plastic material to casting surfaces of sheeting machines
US3112528A (en) * 1960-12-27 1963-12-03 Eastman Kodak Co Method and apparatus for prevention of slug formation in the casting of film support and sheeting
BE625785A (enrdf_load_stackoverflow) * 1962-12-10 1900-01-01

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773452A (en) * 1970-05-12 1973-11-20 J Taga Apparatus for molding thermoplastic materials
US3735729A (en) * 1970-09-24 1973-05-29 Eastman Kodak Co Apparatus for coating a continuous web
US3852392A (en) * 1972-12-18 1974-12-03 Borden Inc Method of removing plasticizer mist from air
JPS5141053A (enrdf_load_stackoverflow) * 1974-08-07 1976-04-06 Ici Ltd
US4145173A (en) * 1976-04-05 1979-03-20 Saint-Gobain Industries Film-forming head
FR2391835A1 (fr) * 1976-08-27 1978-12-22 Ibm France Procede d'extrusion de film plastique, dispositif mettant en oeuvre ledit procede, film plastique produit et application notamment a la fabrication de rubans encreurs
US4174200A (en) * 1976-12-10 1979-11-13 Tetra Pak Developpement Sa Apparatus for the manufacture of a continuous film or web of thermoplastic material
EP0057106A1 (en) * 1981-01-28 1982-08-04 E.I. Du Pont De Nemours And Company Device for uniform web pinning
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
DE3309343A1 (de) * 1983-03-16 1984-09-20 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Vorrichtung zum auftragen mindestens einer giessschicht
US4610745A (en) * 1985-02-01 1986-09-09 Kimberly-Clark Corporation Method and apparatus for applying hot melt pressure sensitive adhesive to a heat sensitive web
US4917844A (en) * 1987-04-01 1990-04-17 Fuji Photo Film Co., Ltd. Method of manufacturing laminate product
US4867924A (en) * 1988-04-22 1989-09-19 The Budd Company Method and apparatus for compression molding under vacuum
US4988471A (en) * 1989-09-15 1991-01-29 Sano, Inc. Apparatus and method of forming a continuous layer of thermoplastic material
US5162070A (en) * 1990-04-20 1992-11-10 A-Z Formen- Und Maschinenbau Gmbh Binding rubber extruder
FR2698580A1 (fr) * 1992-12-01 1994-06-03 Albert Plastiques Dispositif pour plaquer sur un cylindre de refroidissement le film sortant d'une filière plate.
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
US6273704B1 (en) * 1997-04-21 2001-08-14 Mitsubishi Heavy Industries, Ltd. Casting apparatus for formation of resin-made membrane
US6168412B1 (en) 1997-12-26 2001-01-02 Mitsubishi Heavy Industries, Ltd. Casting apparatus for formation of resin-made membrane
US20060192317A1 (en) * 2005-02-25 2006-08-31 Paulson Jack E Method and apparatus for drying coated sheet material
CN101137482B (zh) * 2005-03-07 2010-09-08 富士胶片株式会社 溶液流延方法
US20080191376A1 (en) * 2005-03-07 2008-08-14 Fujifilm Corporation Solution Casting Method
TWI426989B (zh) * 2005-03-07 2014-02-21 Fujifilm Corp 溶液流延製法
US20130020737A1 (en) * 2011-07-20 2013-01-24 Extrusion Dies Industries, Llc Sculpted extrusion die
US9085104B2 (en) * 2011-07-20 2015-07-21 Nordson Corporation Sculpted extrusion die
US20160052191A1 (en) * 2014-08-20 2016-02-25 Tredegar Film Products Corporation Formed Films, Methods And Apparatus For Manufacturing Same, And Articles Comprising Same
US11872740B2 (en) 2015-07-10 2024-01-16 Berry Plastics Corporation Microporous breathable film and method of making the microporous breathable film
US20170129228A1 (en) * 2015-11-05 2017-05-11 Berry Plastics Corporation Polymeric films and methods for making polymeric films
US10717255B2 (en) * 2015-11-05 2020-07-21 Berry Plastics Corporation 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

Also Published As

Publication number Publication date
JPS4936946B1 (enrdf_load_stackoverflow) 1974-10-04
DE1629393B1 (de) 1971-12-09
GB1146549A (en) 1969-03-26

Similar Documents

Publication Publication Date Title
US3347962A (en) Method and apparatus for casting a liquid composition
US2761419A (en) Multiple coating apparatus
US3825645A (en) Extrusion method and apparatus
IE45277B1 (en) Extrusion head
JPH0410053B2 (enrdf_load_stackoverflow)
US3735729A (en) Apparatus for coating a continuous web
JPS6218237A (ja) ウエツプの均一押しつけ装置
GB542509A (en) Transparent films of polymeric materials
US3423493A (en) Process and apparatus for the manufacture of thermoplastic films
US3690917A (en) Suction system and process for coating arrangements avoiding the transmission of pressure differences to the coating operation
JPS6210816B2 (enrdf_load_stackoverflow)
JPH01231969A (ja) 塗布方法
US3694132A (en) Extrusion die deckle means
GB2092512A (en) Extrusion die deckles
US3638604A (en) Apparatus for coating strip-form substrates
JPS6140539B2 (enrdf_load_stackoverflow)
GB2190325A (en) Extrusion tool for synthetic thermoplastic material
JPS6241457B2 (enrdf_load_stackoverflow)
JPH0419012B2 (enrdf_load_stackoverflow)
JPS636345B2 (enrdf_load_stackoverflow)
GB572557A (en) Improvements in or relating to film extrusion apparatus
FR1451318A (fr) Procédé et appareil pour produire des pellicules en matière thermoplastique
JPH0135253Y2 (enrdf_load_stackoverflow)
JPS5798322A (en) Cooling water tank for cooling thermoplastic resin sheet
JPS6026010B2 (ja) 水冷インフレ−シヨンフイルムの製造方法