US20100072655A1 - Die, system, and method for coextruding a plurality of fluid layers - Google Patents

Die, system, and method for coextruding a plurality of fluid layers Download PDF

Info

Publication number
US20100072655A1
US20100072655A1 US12/284,510 US28451008A US2010072655A1 US 20100072655 A1 US20100072655 A1 US 20100072655A1 US 28451008 A US28451008 A US 28451008A US 2010072655 A1 US2010072655 A1 US 2010072655A1
Authority
US
United States
Prior art keywords
microlayer
fluid
forming stem
plates
die
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.)
Abandoned
Application number
US12/284,510
Other languages
English (en)
Inventor
Lawrence E. Roberts
Anton L. Timmons
Bradford E. Webster
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.)
Cryovac LLC
Original Assignee
Cryovac LLC
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 Cryovac LLC filed Critical Cryovac LLC
Priority to US12/284,510 priority Critical patent/US20100072655A1/en
Assigned to CRYOVAC, INC. reassignment CRYOVAC, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROBERTS, LAWRENCE E., TIMMONS, ANTON L., WEBSTER, BRADFORD E.
Priority to CN200980146596.3A priority patent/CN102223995B/zh
Priority to NZ591629A priority patent/NZ591629A/xx
Priority to AU2009300410A priority patent/AU2009300410B2/en
Priority to EP09789304.4A priority patent/EP2326481B1/en
Priority to PCT/US2009/005134 priority patent/WO2010039173A2/en
Priority to BRPI0918976A priority patent/BRPI0918976B8/pt
Priority to RU2011115883/05A priority patent/RU2500532C2/ru
Priority to US12/661,341 priority patent/US8876512B2/en
Publication of US20100072655A1 publication Critical patent/US20100072655A1/en
Priority to US13/754,012 priority patent/US8821775B2/en
Priority to US13/765,954 priority patent/US8821145B2/en
Abandoned 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
    • B29C48/03—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
    • 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
    • B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • B29C48/147—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle
    • B29C48/1472—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle at the die nozzle exit 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/185—Articles comprising two or more components, e.g. co-extruded layers the components being layers comprising six or more components, i.e. each component being counted once for each time it is present, e.g. in a layer
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
    • 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
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B29C48/3363—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a layered die, e.g. stacked discs
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • 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
    • 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
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0616—VLDPE, i.e. very low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0625—LLDPE, i.e. linear low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0641—MDPE, i.e. medium density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/086—EVOH, i.e. ethylene vinyl alcohol copolymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material

Definitions

  • the present invention relates to a coextrusion die and, more particularly, to a coextrusion die containing both a microlayer assembly and one or more distribution plates to produce coextruded films having both microlayers and thicker, conventional film layers.
  • Coextrusion is a technique for producing a multilayer plastic (polymeric) film by bringing two or more molten polymers together in a die, in which the polymers are formed into a generally tubular or planar shape, juxtaposed in layered form, and then pushed out of an annular- or slot-shaped opening in the die. Once outside of the die, the still-molten multilayer film is exposed to an environment having a temperature that is maintained below the melting point of the component polymeric layers of the film, which causes the layers to melt-bond together as they cool and solidify.
  • Multilayer films typically have a thickness in the range of 50-200 mils upon emergence from the die, but the films are generally stretched prior to final solidification in order to expand their surface area and reduce their final thickness to a range of about 0.5 to about 50 mils.
  • Conventional multilayer films generally have 3-10 layers; prior to stretching and thinning, i.e., while still in the die, each such layer generally ranges from about 20-100 mils in thickness.
  • Microlayer extrusion is a technique for increasing the total number of layers in a multilayer film for a given film thickness, by reducing the thickness of the component layers of the film.
  • conventional film layers generally range from 20-100 mils inside the die (i.e., prior to stretching and thinning)
  • microlayers generally have an ‘in-die’ thickness ranging from about 1-20 mils.
  • microlayered films may have far more than 10 layers, e.g., 20, 30, 40, 50, or more layers.
  • Such microlayered films have been found to provide certain beneficial properties relative to conventional films composed of thicker layers that are fewer in number, e.g., improved mechanical properties such as superior flex cracking and puncture resistance.
  • microlayers For many applications, it is desirable to combine thicker, conventional layers with microlayers. Such thicker layers are often superior to microlayers for functions such as heat-sealing and abuse-resistance.
  • a die for coextruding a plurality of fluid layers comprising:
  • each of the plates having a fluid inlet and a fluid outlet, the fluid outlet from each of the plates being in fluid communication with the primary forming stem and structured to deposit a layer of fluid onto the primary forming stem;
  • a microlayer assembly comprising
  • the microlayer forming stem is in fluid communication with the primary forming stem such that the microlayered fluid mass flows from the microlayer forming stem and onto the primary forming stem.
  • Another aspect of the invention is directed to a system for coextruding a plurality of fluid layers, comprising a die as described above, and one or more extruders in fluid communication with the die to supply one or more fluids to the die.
  • a further aspect of the invention pertains to a method of coextruding a plurality of fluid layers, comprising:
  • FIG. 1 is a schematic view of a system 10 in accordance with the present invention for coextruding a plurality of fluid layers, including a die 12 ;
  • FIG. 2 is a cross-sectional view of the die 12 shown in FIG. 1 ;
  • FIG. 3 is a plan view one of the microlayer plates 48 in die 12 ;
  • FIG. 4 is a cross-sectional view of the microlayer plate 48 shown in FIG. 3 ;
  • FIG. 5 is a magnified, cross-sectional view of die 12 , showing the combined flows from the microlayer plates 48 and distribution plates 32 .
  • FIG. 1 schematically illustrates a system 10 in accordance with the present invention for coextruding a plurality of fluid layers.
  • System 10 generally includes a die 12 and one or more extruders 14 a and 14 b in fluid communication with the die 12 to supply one or more fluids to the die.
  • the fluid layers coextruded by die 12 may comprise one or more molten thermoplastic polymers.
  • polymers include polyolefins, polyesters (e.g., PET), polystyrenes, polyamide homopolymers and copolymers (e.g. PA6, PA12, PA6/12, etc.), polycarbonates, etc.
  • polyethylene homopolymers and copolymers may be used, as well as polypropylene homopolymers and copolymers (e.g., propylene/ethylene copolymer).
  • Polyethylene homopolymers may include low density polyethylene (LDPE) and high density polyethylene (HDPE).
  • Suitable polyethylene copolymers may include a wide variety of polymers, such as, e.g., ionomers, ethylene/vinyl acetate (EVA), ethylene/vinyl alcohol (EVOH), and ethylene/alpha-olefins, including heterogeneous (Zeigler-Natta catalyzed) and homogeneous (metallocene, single-cite catalyzed) ethylene/alpha-olefin copolymers.
  • EVA ethylene/vinyl acetate
  • EVOH ethylene/vinyl alcohol
  • ethylene/alpha-olefins including heterogeneous (Zeigler-Natta catalyzed) and homogeneous (metallocene, single-cite catalyzed) ethylene/alpha-olefin copolymers.
  • Ethylene/alpha-olefin copolymers are copolymers of ethylene with one or more comonomers selected from C 3 to C 20 alpha-olefins, such as 1-butene, 1-pentene, 1-hexene, 1-octene, methyl pentene and the like, including linear low density polyethylene (LLDPE), linear medium density polyethylene (LMDPE), very low density polyethylene (VLDPE), and ultra-low density polyethylene (ULDPE).
  • LLDPE linear low density polyethylene
  • LMDPE linear medium density polyethylene
  • VLDPE very low density polyethylene
  • ULDPE ultra-low density polyethylene
  • the polymeric materials may be supplied to the extruders 14 a, b in the solid-state, e.g., in the form of pellets or flakes, via respective hoppers 16 a, b.
  • Extruders 14 a, b are maintained at a temperature sufficient to convert the solid-state polymer to a molten state, and internal screws within the extruders (not shown) move the molten polymer into and through die 12 via respective pipes 18 a, b.
  • the molten polymer is converted into thin film layers, and each of the layers are superimposed, combined together, and expelled from the die at discharge end 20 , i.e., “coextruded,” to form a tubular, multilayer film 22 .
  • the tubular, multilayer film 22 is exposed to ambient air or a similar environment having a temperature sufficiently low to cause the molten polymer from which the film is formed to transition from a liquid state to a solid state. Additional cooling/quenching of the film may be achieved by providing a liquid quench bath (not shown), and then directing the film through such bath.
  • the solidified tubular film 22 is then collapsed by a convergence device 24 , e.g., a V-shaped guide as shown, which may contain an array of rollers to facilitate the passage of film 22 therethrough.
  • a pair of counter-rotating drive rollers 25 a, b may be employed as shown to pull the film 22 through the convergence device 24 .
  • the resultant collapsed tubular film 22 may then be wound into a roll 26 by a film winding device 28 as shown.
  • the film 22 on roll 26 may subsequently be unwound for use, e.g., for packaging, or for further processing, e.g., stretch-orientation, irradiation, or other conventional film-processing techniques, which are used to impart desired properties as necessary for the intended end-use applications for the film.
  • die 12 is adapted to coextrude a plurality of fluid layers, and generally includes a primary forming stem 30 , one or more distribution plates 32 , and a microlayer assembly 34 .
  • five distribution plates 32 are included, as individually indicated by the reference numerals 32 a - e.
  • a greater or lesser number of distribution plates 32 may be included as desired.
  • the number of distribution plates in die 12 may range, e.g., from one to twenty, or even more then twenty if desired.
  • Each of the distribution plates 32 has a fluid inlet 36 and a fluid outlet 38 (the fluid inlet is not shown in plate 32 b ).
  • the fluid outlet 38 from each of the distribution plates 32 is in fluid communication with the primary forming stem 30 , and also is structured to deposit a layer of fluid onto the primary forming stem.
  • the distribution plates 32 may be constructed as described in U.S. Pat. No. 5,076,776, the entire disclosure of which is hereby incorporated herein by reference thereto.
  • the distribution plates 32 may have one or more spiral-shaped fluid-flow channels 40 to direct fluid from the fluid inlet 36 and onto the primary forming stem 30 via the fluid outlet 38 .
  • the fluid outlet 38 generally provides a relatively narrow fluid-flow passage such that the fluid flowing out of the plate has a final desired thickness corresponding to the thickness of the fluid outlet 38 .
  • Other channel configurations may also be employed, e.g., a toroid-shaped channel; an asymmetrical toroid, e.g., as disclosed in U.S. Pat. No. 4,832,589; a heart-shaped channel; a helical-shaped channel, e.g., on a conical-shaped plate as disclosed in U.S. Pat. No. 6,409,953, etc.
  • the channel(s) may have a semi-circular or semi-oval cross-section as shown, or may have a fuller shape, such as an oval or circular cross-sectional shape.
  • distribution plates 32 may have a generally annular shape such that the fluid outlet 38 forms a generally ring-like structure, which forces fluid flowing through the plate to assume a ring-like form.
  • Such ring-like structure of fluid outlet 38 in combination with its proximity to the primary forming stem 30 , causes the fluid flowing through the plate 32 to assume a cylindrical shape as the fluid is deposited onto the stem 30 .
  • Each flow of fluid from each of the distribution plates 32 thus forms a distinct cylindrical layer on the primary forming stem 30 .
  • the fluid outlets 38 of the distribution plates 32 are spaced from the primary forming stem 30 to form an annular passage 42 .
  • the extent of such spacing is sufficient to accommodate the volume of the concentric fluid layers flowing along the forming stem 30 .
  • the order in which the distribution plates 32 are arranged in die 12 determines the order in which the fluid layers are deposited onto the primary forming stem 30 . For example, if all five distribution plates 32 a - e are supplied with fluid, fluid from plate 32 a will be the first to be deposited onto primary forming stem 30 such that such fluid will be in direct contact with the stem 30 . The next layer to be deposited onto the forming stem would be from distribution plate 32 b. This layer will be deposited onto the fluid layer from plate 32 a. Next, fluid from plate 32 c will be deposited on top of the fluid from plate 32 b.
  • microlayer assembly 34 were not present in the die, the next layer to be deposited would be from distribution plate 32 d, which would be layered on top of the fluid layer from plate 32 c. Finally, the last and, therefore, outermost layer to be deposited would be from plate 32 e. In this example (again, ignoring the microlayer assembly 34 ), the resultant tubular film 22 that would emerge from the die would have five distinct layers, which would be arranged as five concentric cylinders bonded together.
  • the fluid layers from the distribution plates 32 are deposited onto the primary forming stem 30 either directly (first layer to be deposited, e.g., from distribution plate 32 a ) or indirectly (second and subsequent layers, e.g., from plates 32 b - e ).
  • the discharge end 20 may thus include an annular discharge opening 44 to allow the passage of the tubular film 22 out of the die.
  • annular discharge opening is commonly referred to as a “die lip.”
  • the diameter of the annular discharge opening 44 may be greater than that of the annular passage 42 , e.g., to increase the diameter of the tubular film 22 to a desired extent. This has the effect of decreasing the thickness of each of the concentric layers that make up the tubular film 22 , i.e., relative to the thickness of such layers during their residence time within the annular passage 42 .
  • the diameter of the annular discharge opening 44 may be smaller than that of the annular passage 42 .
  • Microlayer assembly 34 generally comprises a microlayer forming stem 46 and a plurality of microlayer distribution plates 48 .
  • fifteen microlayer distribution plates 48 a - o are shown.
  • a greater or lesser number of microlayer distribution plates 48 may be included as desired.
  • the number of microlayer distribution plates 48 in microlayer assembly 34 may range, e.g., from one to fifty, or even more then fifty if desired. In many embodiments of the present invention, the number of microlayer distribution plates 48 in microlayer assembly 34 will be at least about 5, e.g., 10, 15, 20, 25, 30, 35, 40, 45, 50, etc., or any number of plates in between the foregoing numbers.
  • Each of the microlayer plates 48 has a fluid inlet 50 and a fluid outlet 52 .
  • the fluid outlet 52 from each of the microlayer plates 48 is in fluid communication with microlayer forming stem 46 , and is structured to deposit a microlayer of fluid onto the microlayer forming stem. Similar to the distribution plates 32 , the microlayer plates 48 may also be constructed as described in the above-incorporated U.S. Pat. No. 5,076,776.
  • the microlayer plates 48 may have a spiral-shaped fluid-flow channel 54 , which is supplied with fluid via fluid inlet 50 .
  • two more fluid-flow channels may be employed in plate 48 , which may be fed from separate fluid inlets or a single fluid inlet.
  • Other channel configurations may also be employed, e.g., a toroid-shaped channel; an asymmetrical toroid, e.g., as disclosed in U.S. Pat. No. 4,832,589; a heart-shaped channel; a helical-shaped channel, e.g., on a conical-shaped plate as disclosed in U.S. Pat. No. 6,409,953; etc.
  • the channel(s) may have a semi-circular or semi-oval cross-section as shown, or may have a fuller shape, such as an oval or circular cross-sectional shape.
  • the flow channel(s) 54 its function is to connect the fluid inlet(s) 50 with the fluid outlet 52 in such a manner that the flow of fluid through the microlayer assembly 34 is converted from a generally stream-like, axial flow to a generally film-like, convergent radial flow towards the microlayer forming stem 46 .
  • Microlayer plate 48 as shown in FIG. 3 may accomplish this in two ways. First, the channel 54 spirals inwards towards the center of the plate, and thus directs fluid from the fluid inlet 50 , located near the periphery of the plate, towards the fluid outlet 52 , which is located near the center of the plate.
  • the channel 54 may be fashioned with a progressively shallower depth as the channel approaches the fluid outlet 52 . This has the effect of causing some of the fluid flowing through the channel 54 to overflow the channel and proceed radially-inward toward the fluid outlet 52 in a relatively flat, film-like flow. Such radial-inward flow may occur in overflow regions 53 , which may be located between the spaced-apart spiral sections of channel 54 . As shown in FIG. 4 , the overflow regions 53 may be formed as recessed sections in plate 48 , i.e., recessed relative to the thicker, non-recessed region 55 at the periphery of the plate. As shown in FIG.
  • overflow regions 53 may begin at step-down 57 and, e.g., spiral inwards towards fluid outlet 52 between the spirals of channel 54 .
  • the non-recessed, peripheral region 55 abuts against the plate or other structure above the plate, e.g., as shown in FIGS. 2 and 5 , and thus prevents fluid from flowing outside the periphery of the plate. In this manner, the non-recessed, peripheral region 55 forces fluid entering the plate to flow radially inward toward fluid outlet 52 .
  • Step-down 57 thus represents a line or zone of demarcation between the ‘no-flow’ peripheral region 55 and the ‘flow’ regions 53 and 54 .
  • the fluid that remains in the channel 54 and reaches the end 56 of the channel flows directly into the fluid outlet 52 .
  • the fluid outlet 52 generally provides a relatively narrow fluid-flow passage and generally determines the thickness of the microlayer flowing out of the microlayer plate 48 .
  • the thickness of the fluid outlet 52 and therefore the thickness of the microlayer flowing therethrough, may be determined, e.g., by the spacing between the plate surface at outlet 52 and the bottom of the plate or other structure (e.g., manifold 76 or 78 ) immediately above the plate surface at outlet 52 .
  • each of the microlayer distribution plates 48 may have an orifice 58 extending through the plate.
  • the orifice 58 may be located substantially in the center of each microlayer plate 48 , with the fluid outlet 52 of each plate positioned adjacent to such orifice 58 .
  • the microlayer forming stem 46 may extend through the orifice 58 of each of the microlayer distribution plates 48 .
  • the microlayer distribution plates 48 may have a generally annular shape such that the fluid outlet 52 forms a generally ring-like structure, which forces fluid flowing through the plate to exit the plate in a radially-convergent, ring-like flow pattern.
  • Such ring-like structure of fluid outlet 52 in combination with its proximity to the microlayer forming stem 46 , causes the fluid exiting the microlayer plates 48 to assume a cylindrical shape as the fluid is deposited onto the microlayer stem 46 .
  • Each flow of fluid from each of the microlayer distribution plates 48 thus deposits a distinct cylindrical microlayer on the microlayer forming stem 46 .
  • the microlayer plates 48 may be arranged to provide a predetermined order in which the microlayers are deposited onto the microlayer forming stem 46 . For example, if all fifteen microlayer distribution plates 48 a - o are supplied with fluid, a microlayer of fluid from plate 48 a will be the first to be deposited onto microlayer forming stem 46 such that such microlayer will be in direct contact with the stem 46 . The next microlayer to be deposited onto the forming stem would be from microlayer plate 48 b. This microlayer will be deposited onto the microlayer from plate 48 a. Next, fluid from microlayer plate 48 c will be deposited on top of the microlayer from plate 48 b, etc. The last and, therefore, outermost microlayer to be deposited is from plate 48 o.
  • microlayers are deposited onto the microlayer forming stem 46 in the form of a substantially unified, microlayered fluid mass 60 (see FIG. 5 ).
  • microlayered fluid mass 60 would comprise up to fifteen distinct microlayers (at the downstream end of stem 46 ), arranged as fifteen concentric cylindrical microlayers bonded and flowing together in a predetermined order (based on the ordering of the microlayer plates 48 a - o ) on microlayer forming stem 46 .
  • the fluid layers from the microlayer distribution plates 48 are deposited onto the microlayer forming stem 46 either directly (the first layer to be deposited, e.g., from microlayer plate 48 a ) or indirectly (the second and subsequent layers, e.g., from microlayer plates 48 b - o ).
  • the orifices 58 in each of the microlayer plates 48 are preferably large enough in diameter to space the fluid outlets 52 of the microlayer plates 48 sufficiently from the microlayer forming stem 46 to form an annular passage 62 for the microlayers ( FIG. 2 ). The extent of such spacing is preferably sufficient to accommodate the volume of the concentric microlayers flowing along the microlayer stem 46 .
  • microlayer forming stem 46 is in fluid communication with primary forming stem 30 such that the microlayered fluid mass 60 flows from the microlayer forming stem 46 and onto the primary forming stem 30 .
  • FIG. 5 wherein microlayered fluid mass 60 from microlayer assembly 34 is shown flowing from microlayer forming stem 46 and onto primary forming stem 30 .
  • Fluid communication between the microlayer stem 46 and primary stem 30 may be achieved by including in die 12 an annular transfer gap 64 between the annular passage 62 for the microlayer stem 46 and the annular passage 42 for the primary stem 30 (see also FIG. 2 ).
  • Such transfer gap 64 allows the microlayered fluid mass 60 to flow out of the annular passage 62 and into the annular passage 42 for the primary forming stem 30 .
  • the microlayers from microlayer plates 48 are introduced as a unified mass into the generally larger volumetric flow of the thicker fluid layers from the distribution plates 32 .
  • the inventors have discovered that combining the flows of the microlayers with the thicker fluid layers in this fashion minimizes the deleterious effects of interfacial flow instabilities, which generally make it difficult to combine the flow of thin layers with relatively thick layers in such a way that the physical integrity and independent properties of the thin layers are maintained.
  • the microlayer forming stem 46 allows the microlayers from the microlayer plates 48 to assemble into the microlayered fluid mass 60 in relative calm, i.e., without being subjected to the more powerful sheer forces of the thicker layers flowing from the distribution plates 32 .
  • the interfacial flow instabilities created by the merger of each layer onto the fluid mass 60 are minimized because all the microlayers have a similar degree of thickness, i.e., relative to the larger degree of thickness of the fluid layers from distribution plates 32 .
  • the microlayered fluid mass 60 enters the flow of the thicker layers from distribution plates 32 on primary stem 30 with a mass flow rate that more closely approximates that of such thicker layers, thereby increasing the ability of the microlayers in fluid mass 60 to retain their physical integrity and independent physical properties.
  • primary forming stem 30 and microlayer forming stem 46 may be substantially coaxially aligned with one another in die 12 , e.g., with the microlayer forming stem 46 being external to the primary forming stem 30 .
  • This construction provides a relatively compact configuration for die 12 , which can be highly advantageous in view of the stringent space constraints that exist in the operating environment of many commercial coextrusion systems.
  • the coaxial alignment of the primary forming stem 30 with the microlayer forming stem 46 allows the distribution plates 32 and the microlayer assembly 34 to be axially positioned along the primary forming stem, as shown in FIG. 2 .
  • one or more distribution plates 32 may be located upstream of the microlayer assembly 34 .
  • fluid layers from such upstream distribution plates are deposited onto primary forming stem 30 prior to the deposition of the microlayered fluid mass 60 onto the primary stem 30 .
  • distribution plates 32 a - c are located upstream of microlayer assembly 34 in die 12 . Fluid layers 65 from such upstream distribution plates 32 a - c are thus interposed between the microlayered fluid mass 60 and the primary forming stem 30 (see FIG. 5 ).
  • the microlayer assembly 34 may be located upstream of the distribution plates 32 , i.e., the distribution plates may be located downstream of the microlayer assembly 34 in this alternative embodiment.
  • the microlayers from the microlayer assembly 34 i.e., the microlayered fluid mass 60
  • FIG. 2 it may be seen that microlayer assembly 34 is located upstream of distribution plates 32 d - e in die 12 .
  • the microlayered fluid mass 60 is thus interposed between the fluid layer(s) 70 from such distribution plates 32 d - e and the primary forming stem 30 .
  • the microlayer assembly 34 may also be positioned between one or more upstream distribution plates, e.g., plates 32 a - c, and one or more downstream distribution plates, e.g., plates 32 d - e.
  • upstream distribution plates e.g., plates 32 a - c
  • downstream distribution plates e.g., plates 32 d - e.
  • fluid(s) from upstream plates 32 a - c are deposited first onto primary stem 30 , followed by the microlayered fluid mass 60 from the microlayer assembly 34 , and then further followed by fluid(s) from downstream plates 32 d - e.
  • the microlayers from microlayer assembly 34 are sandwiched between thicker layers from both the upstream plates 32 a - c and the downstream plates 32 d - e.
  • die 12 may include one or more additional microlayer assemblies, which may be the same as microlayer assembly 34 or may have a different configuration, e.g., a different number of microlayer plates.
  • any such additional microlayer assemblies may be coaxially aligned with the primary forming stem 30 , and may be positioned upstream and/or downstream of the microlayer assembly 34 shown in FIG. 2 .
  • Such additional microlayer assemblies may be used in place of or in addition to the distribution plates 32 .
  • additional microlayer assemblies may be positioned adjacent to the microlayer assembly 34 , or may be spaced from such assembly 34 by one or more distribution plates 32 .
  • microlayer assemblies may also be sandwiched between upstream and downstream distribution plates, e.g., between the upstream plates 32 a - c and downstream plates 32 d - e shown in FIG. 2 .
  • the distribution plates 32 may have a thickness T 1 (see FIG. 5 ) ranging from about 0.5 to about 2 inches, e.g., greater than 0.5 inch, such as 0.501 or more, 0.502 or more, 0.503 or more, etc., or less than 2, e.g., 1.999 or less, 1.998 or less, etc., such as from about 0.501 to 1.999 inches, 0.502 to 1.998 inches, etc.
  • the microlayer distribution plates 48 may have a thickness T 2 ranging from about 0.1 to about 0.5 inch, e.g., greater than 0.1, such as 0.101 or more, 0.102 or more, etc., or less than 0.5, e.g., 0.499 or less, 0.498 or less, etc., such as from about 0.101 to 0.499 inch, 0.102 to 0.498 inch, etc. Such thickness ranges are not intended to be limiting in any way, but only to illustrate typical examples. All distribution plates 32 will not necessarily have the same thickness, nor will all of the microlayer plates 48 .
  • microlayer plate 48 o the most downstream of the microlayer plates in the assembly 34 , may be thicker than the other microlayer plates to accommodate a sloped contact surface 66 , which may be employed to facilitate the transfer of microlayered fluid mass 60 through the annular gap 64 and onto the primary forming stem 30 .
  • each of the microlayers flowing out of the plates 48 has a thickness “M” corresponding to the thickness of the fluid outlet 52 from which each microlayer emerges.
  • the microlayers flowing from the microlayer plates 48 are schematically represented in FIG. 5 by the phantom arrows 68 .
  • each of the relatively thick fluid layers flowing out of the plates 32 has a thickness “D” corresponding to the thickness of the fluid outlet 38 from which each such layer emerges (see FIG. 5 ).
  • the relatively thick fluid layers flowing from the distribution plates 32 are schematically represented in FIG. 5 by the phantom arrows 70 .
  • the thickness M of the microlayers will be less than the thickness D of the fluid layers from the distribution plates 32 .
  • the thinner that such microlayers are relative to the fluid layers from the distribution plates 32 the more of such microlayers that can be included in a multilayer film, for a given overall film thickness.
  • Thickness D from each distribution plate 32 will generally range from about 20-100 mils, e.g., greater than 20 mils, greater than 21 mils, greater than 22 mils, etc., less than 100 mils, less than 90 mils, less than 80 mils, less than 70 mils, less than 60 mils, etc., such as between 20 to 50 mils, 21 to 49 mils, 22 to 48 mils, 23 to 47 mils, etc.
  • the foregoing thicknesses are not intended to be limiting of the scope of the present invention in any way, and are provided solely for illustration purposes.
  • the ratio of M:D may range from about 1:1 to about 1:8, e.g., greater than 1:1, greater than 1:1.1, greater than 1:1.2, greater than 1:2, greater than 1:3, etc., less than 1:8, less than 1:7.9, less than 1:7.8, less than 1:7, less than 1:6, etc., such as between 1:1.1-1:7.9; 1:1.2-1:7.8, 1:2-1:7, 1:3-1:6, 1:4-1:5, etc.
  • Thickness M may be the same or different among the microlayers 68 flowing from microlayer plates 48 to achieve a desired distribution of layer thicknesses in the microlayer section of the resultant film.
  • thickness D may be the same or different among the thicker layers 70 flowing from the distribution plates 32 to achieve a desired distribution of layer thicknesses in the ‘thick-layer section(s)’ of the resultant film.
  • the layer thicknesses M and D will typically change as the fluid flows downstream through the die, e.g., if the melt tube is expanded at annular discharge opening 44 as shown in FIG.
  • a method of coextruding a plurality of fluid layers in accordance with the present invention comprises the steps of:
  • microlayer assembly 34 b. forming a substantially unified, microlayered fluid mass 60 on microlayer forming stem 46 by directing at least one additional fluid through microlayer assembly 34 ;
  • microlayered fluid mass 60 from the microlayer forming stem 46 and onto the primary forming stem 30 to merge the microlayered fluid mass 60 with the fluid layer(s) from the distribution plate(s) 32 .
  • the distribution plates 32 and microlayer plates 48 preferably have an annular configuration, such that primary forming stem 30 and microlayer stem 46 pass through the center of the plates to receive fluid that is directed into the plates.
  • the fluid may be supplied from extruders, such as extruders 14 a, b .
  • the fluid may be directed into the die 12 via vertical supply passages 72 , which receive fluid from feed pipes 18 , and direct such fluid into the die plates 32 and 48 .
  • the plates may have one or more through-holes 74 , e.g., near the periphery of the plate as shown in FIG. 3 , which may be aligned to provide the vertical passages 72 through which fluid may be directed to one or more downstream plates.
  • three through-holes 74 are shown in FIG. 3 , a greater or lesser number may be employed as necessary, e.g., depending upon the number of extruders that are employed.
  • one supply passage 72 may be used for each extruder 14 that supplies fluid to die 12 .
  • the extruders 14 may be arrayed around the circumference of the die, e.g., like the spokes of a wheel feeding into a hub, wherein the die is located at the hub position.
  • die 12 may include a primary manifold 76 to receive the flow of fluid from the extruders 14 via feed pipes 18 , and then direct such fluid into a designated vertical supply passage 72 , in order to deliver the fluid to the intended distribution plate(s) 32 and/or microlayer plate(s) 48 .
  • the microlayer assembly 34 may optionally include a microlayer manifold 78 to receive fluid directly from one or more additional extruders 80 via feed pipe 82 (shown in phantom in FIG. 1 ).
  • extruder 14 b delivers a fluid, e.g., a first molten polymer, directly to the fluid inlet 36 of distribution plate 32 a via pipe 18 b and primary manifold 76 .
  • distribution plate 32 a receives all of the output from extruder 14 b, i.e., such that the remaining plates and microlayer plates in the die 12 are supplied, if at all, from other extruders.
  • the fluid inlet 36 of distribution plate 32 a may be configured to contain an outlet port to allow a portion of the supplied fluid to pass through to one or more additional plates, e.g., distribution plates 32 and/or microlayer plates 48 , positioned downstream of distribution plate 32 a.
  • an outlet port 84 may be formed in the base of the fluid inlet 50 of the plate.
  • Such outlet port 84 allows the flow of fluid delivered to plate 48 to be split: some of the fluid flows into channel 54 while the remainder passes through the plate for delivery to one or more additional downstream plates 48 and/or 32 .
  • a similar outlet port can be included in the base of the fluid inlet 36 of a distribution plate 32 . Delivery of fluid passing through the outlet port 84 (or through a similar outlet port in a distribution plate 32 ) may be effected via a through-hole 74 in an adjacent plate (see FIG. 5 ), or via other means, e.g., a lateral-flow supply plate, to direct the fluid in an axial, radial, and/or tangential direction through die 12 as necessary to reach its intended destination.
  • Distribution plates 32 b - c are being supplied with fluid via extruder(s) and supply pipe(s) and/or through-holes that are not shown in FIG. 2 .
  • the fluid flow along primary forming stem 30 from distribution plates 32 a - c is shown in FIG. 5 , as indicated by reference numeral 65 .
  • microlayer assembly 34 is being supplied with fluid by extruders 14 a and 80 .
  • microlayer plates 48 a, c, e, g, i, k, m, and o are supplied by extruder 14 a via supply pipe 18 a and vertical pipe and/or passage 72 .
  • Microlayer plates 48 b, d, f, h, j, l, and n are supplied with fluid by extruder 80 via feed pipe 82 and a vertical supply passage 86 .
  • vertical passage 86 originates in microlayer manifold 78 and delivers fluid only within the microlayer assembly 34 .
  • vertical passage 72 originates in manifold 76 , extends through distribution plates 32 a - c (via aligned through-holes 74 in such plates), then further extends through manifold 78 via manifold passage 79 before finally arriving at microlayer plate 48 a.
  • Microlayer plate 48 b may be oriented, i.e., rotated, such that a through-hole 74 is positioned beneath the outlet port 84 of microlayer plate 48 a so that the fluid flowing out of the outlet port 84 flows through the microlayer plate 48 b, and not into the channel 54 thereof.
  • Microlayer plate 48 c may be positioned such that the fluid inlet 50 thereof is in the same location as that of microlayer plate 48 a so that fluid flowing out of through-hole 74 of microlayer plate 48 b flows into the inlet 50 of plate 48 c. Some of this fluid flows into the channel 54 of plate 48 c while some of the fluid passes through the plate via outlet port 84 , passes through a through-hole 74 in the next plate 48 d, and is received by fluid inlet 50 of the next microlayer plate 48 e, where some of the fluid flows into channel 54 and some passes out of the plate via outlet port 84 .
  • Fluid from extruder 14 a continues to be distributed to remaining plates 48 g, i, k, and m in this manner, except for microlayer plate 48 o, which has no outlet port 84 so that fluid does not pass through plate 48 o, except via channel 54 and fluid outlet 52 .
  • fluid from extruder 80 and vertical passage 86 passes through microlayer plate 48 a via a through-hole 74 and then enters microlayer plate 48 b at fluid inlet 50 thereof. Some of this fluid flows through the channel 54 and exits the plate at outlet 52 , to become the second microlayer to be deposited onto microlayer stem 46 (on top of the microlayer from plate 48 a ), while the remainder of the fluid passes through the plate via an outlet port 84 .
  • Such fluid may pass through microlayer plate 48 c via a through-hole 74 , and be delivered to plate 48 d via appropriate alignment of its inlet 50 with the through-hole 74 of plate 48 c, through which the fluid from extruder 80 passes. This fluid-distribution process may continue for plates 48 f, h, j, and l, until the fluid reaches plate 48 n, which has no outlet port 84 such that fluid does not pass through this plate except via its fluid outlet 52 .
  • microlayer stem 46 a series of microlayers comprising alternating fluids from extruders 14 a and 80 may be formed on microlayer stem 46 .
  • extruder 14 a supplied EVOH and extruder 80 supplied PA6 the resultant microlayered fluid mass 60 would have the structure:
  • the fluids from extruders 14 a and 80 may be the same or different such that the resultant microlayers in microlayered fluid mass 60 may have the same or a different composition. Only one extruder may be employed to supply fluid to the entire microlayer assembly 34 , in which case all of the resultant microlayers will have the same composition. Alternatively, three or more extruders may be used to supply fluid to the microlayer assembly 34 , e.g., with each supplying a different fluid such that three different microlayer compositions are formed in microlayered fluid mass 60 , in any desired order, e.g., abcabc; abbcabbc; abacabac; etc.
  • the fluid(s) directed through the distribution plate(s) 32 may be substantially the same as the fluid(s) directed through the microlayer assembly 34 .
  • the fluid(s) directed through the distribution plate(s) 32 may be different from the fluid(s) directed through the microlayer assembly.
  • the resultant tubular film may have thick layers and microlayers that have substantially the same composition.
  • some of the thick layers from distribution plates 32 may be the same as some or all of the microlayers from microlayer plates 48 , while other thick layers may be different from some or all of the microlayers.
  • extruders and supply passages for distribution plates 32 d - e are not shown.
  • One or both of such plates may be supplied from extruder 14 a, 14 b, and/or 80 by appropriate arrangement of vertical supply passages 72 , 86 , through-holes 74 , and/or outlet ports 84 of the upstream distribution plates 32 and/or microlayer plates 48 .
  • one or both distribution plates 32 d - e may not be supplied at all, or may be supplied from a separate extruder, such as an extruder in fluid communication with primary manifold 76 and a vertical supply passage 72 that extends through distribution plates 32 a - c and microlayer assembly 34 , e.g., via appropriate alignment of the through-holes 74 of plates 32 a - c and microlayer assembly 34 to create a fluid transport passage through die 12 , leading to fluid inlet 50 of distribution plate 32 d and/or 32 e.
  • a separate extruder such as an extruder in fluid communication with primary manifold 76 and a vertical supply passage 72 that extends through distribution plates 32 a - c and microlayer assembly 34 , e.g., via appropriate alignment of the through-holes 74 of plates 32 a - c and microlayer assembly 34 to create a fluid transport passage through die 12 , leading to fluid inlet 50 of distribution plate 32 d and/or 32 e.
  • one or more of the distribution plates 32 and/or microlayer plates 48 may be supplied with fluid directly from one or more extruders, i.e., by directing fluid directly into the fluid inlet of the plate, e.g., from the side of the plate, without the fluid being first routed through one of manifolds 76 or 78 and/or without using a vertical supply passage 72 , 86 .
  • Such direct feed of one or more plates 32 and/or 48 may be employed as an alternative or in addition to the use of manifolds and vertical supply passages as shown in FIG. 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Micromachines (AREA)
US12/284,510 2008-09-23 2008-09-23 Die, system, and method for coextruding a plurality of fluid layers Abandoned US20100072655A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US12/284,510 US20100072655A1 (en) 2008-09-23 2008-09-23 Die, system, and method for coextruding a plurality of fluid layers
RU2011115883/05A RU2500532C2 (ru) 2008-09-23 2009-09-15 Матрица, система и способ совместной экструзии множества жидкостных слоев
EP09789304.4A EP2326481B1 (en) 2008-09-23 2009-09-15 Die,system, and method for coextruding a plurality of fluid layers
NZ591629A NZ591629A (en) 2008-09-23 2009-09-15 Die,system, and method for coextruding a plurality of fluid layers using forming stems and distribution plates
AU2009300410A AU2009300410B2 (en) 2008-09-23 2009-09-15 Die,system, and method for coextruding a plurality of fluid layers
CN200980146596.3A CN102223995B (zh) 2008-09-23 2009-09-15 用于共挤出多个流体层的模具、系统和方法
PCT/US2009/005134 WO2010039173A2 (en) 2008-09-23 2009-09-15 Die,system, and method for coextruding a plurality of fluid layers
BRPI0918976A BRPI0918976B8 (pt) 2008-09-23 2009-09-15 Matriz, sistema e método para coextrusar uma pluralidade de camadas fluidas
US12/661,341 US8876512B2 (en) 2008-09-23 2010-03-16 Die for coextruding a plurality of fluid layers
US13/754,012 US8821775B2 (en) 2008-09-23 2013-01-30 Method for coextruding a plurality of fluid layers
US13/765,954 US8821145B2 (en) 2008-09-23 2013-02-13 Die for coextruding a plurality of fluid layers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/284,510 US20100072655A1 (en) 2008-09-23 2008-09-23 Die, system, and method for coextruding a plurality of fluid layers

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US12/661,341 Continuation-In-Part US8876512B2 (en) 2008-09-23 2010-03-16 Die for coextruding a plurality of fluid layers
US13/754,012 Division US8821775B2 (en) 2008-09-23 2013-01-30 Method for coextruding a plurality of fluid layers
US13/765,954 Continuation US8821145B2 (en) 2008-09-23 2013-02-13 Die for coextruding a plurality of fluid layers

Publications (1)

Publication Number Publication Date
US20100072655A1 true US20100072655A1 (en) 2010-03-25

Family

ID=42036821

Family Applications (3)

Application Number Title Priority Date Filing Date
US12/284,510 Abandoned US20100072655A1 (en) 2008-09-23 2008-09-23 Die, system, and method for coextruding a plurality of fluid layers
US13/754,012 Active US8821775B2 (en) 2008-09-23 2013-01-30 Method for coextruding a plurality of fluid layers
US13/765,954 Active US8821145B2 (en) 2008-09-23 2013-02-13 Die for coextruding a plurality of fluid layers

Family Applications After (2)

Application Number Title Priority Date Filing Date
US13/754,012 Active US8821775B2 (en) 2008-09-23 2013-01-30 Method for coextruding a plurality of fluid layers
US13/765,954 Active US8821145B2 (en) 2008-09-23 2013-02-13 Die for coextruding a plurality of fluid layers

Country Status (8)

Country Link
US (3) US20100072655A1 (pt)
EP (1) EP2326481B1 (pt)
CN (1) CN102223995B (pt)
AU (1) AU2009300410B2 (pt)
BR (1) BRPI0918976B8 (pt)
NZ (1) NZ591629A (pt)
RU (1) RU2500532C2 (pt)
WO (1) WO2010039173A2 (pt)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100173031A1 (en) * 2008-09-23 2010-07-08 Roberts Lawrence E Die, system, and method for coextruding a plurality of fluid layers
US20100227136A1 (en) * 2009-03-06 2010-09-09 Cryovac, Inc. Multilayer, Heat-Shrinkable Film Comprising a Plurality of Microlayers
US20110229701A1 (en) * 2010-03-18 2011-09-22 Cryovac, Inc. Multilayer Active Oxygen Barrier Film Comprising a Plurality of Microlayers
US20110229722A1 (en) * 2010-03-18 2011-09-22 Cryovac, Inc. Multilayer Oxygen Barrier Film Comprising a Plurality of Adjoining Microlayers Comprising Ethylene/Vinyl Alcohol Copolymer
WO2012129045A1 (en) 2011-03-18 2012-09-27 The Procter & Gamble Company Multi-layer polymeric films and methods of forming same
US20120273991A1 (en) * 2009-11-20 2012-11-01 Weiman Yang Apparatus and method for preparing laminated nano-composite material
US20130243894A1 (en) * 2012-03-16 2013-09-19 Bbs Corporation Layer sequence repeater module for a modular disk co-extrusion die and products thereof
WO2015054350A1 (en) 2013-10-11 2015-04-16 The Procter & Gamble Company Multi-layer polymeric films
DE102015001022A1 (de) * 2015-01-29 2016-07-14 Reifenhäuser GmbH & Co. KG Maschinenfabrik Blaskopf, Verfahren zum Herstellen einer Blasfolie sowie Blasfolienanlage
EP3072686A1 (en) 2015-03-26 2016-09-28 The Procter and Gamble Company Multi-layer polymeric films
DE102016012388A1 (de) 2016-10-18 2018-04-19 Reifenhäuser GmbH & Co. KG Maschinenfabrik Verteilerplattenpaket für einen blaskopf einer blasfolienanlage, blaskopf, verfahren zum herstellen einer folie im blasfolienverfahren, verfahren zum umrüsten eines blaskopfes sowie blasfolienanlage
US11090853B2 (en) 2019-06-14 2021-08-17 Bbs Corporation Modular disk coextrusion die with opposing disk arrangement
US11173642B1 (en) 2021-04-09 2021-11-16 Bbs Corporation Blown film coextrusion line with polygonal extruder arrangement
US11220035B2 (en) 2019-06-14 2022-01-11 Henry G. Schirmer Complex films made from modular disk coextrusion die with opposing disk arrangement
US11338490B1 (en) 2021-04-09 2022-05-24 Bbs Corporation Blown film coextrusion line with polygonal extruder arrangement
US11511474B1 (en) 2021-05-17 2022-11-29 Henry G. Schirmer Modular disk coextrusion die with melt channeling disk

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317697A (zh) * 2012-03-23 2013-09-25 上海金湖挤出设备有限公司 一种三层螺旋式管材共挤机头
CN104044254B (zh) * 2014-05-27 2016-08-17 洛阳一海包装材料有限公司 一种包装膜、袋生产的专用多层共挤模头
US10576718B2 (en) 2016-07-01 2020-03-03 The Proctor & Gamble Company Heat sealable multilayer packaging film with improved opacity
CN106827449B (zh) * 2017-01-20 2022-11-25 广东科志达机械科技有限公司 一种吹膜机的吹膜装置
ES2718704B2 (es) * 2018-02-27 2022-01-11 Nortek S A Boquilla separadora de alta eficiencia
DE102018008127B4 (de) * 2018-10-13 2022-06-09 Hosokawa Alpine Aktiengesellschaft Blaskopf und Verfahren zur Herstellung einer Mehrschichtschlauchfolie
DE102018009632B4 (de) 2018-12-11 2021-12-09 Hosokawa Alpine Aktiengesellschaft Vorrichtung zum Aufwickeln und Wickelwechsel von bahnförmigem Material und ein Verfahren dafür
CN110293666A (zh) * 2019-06-14 2019-10-01 山东通佳智能装备有限公司 一种吹塑机头用分流盘

Citations (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557265A (en) * 1967-12-29 1971-01-19 Dow Chemical Co Method of extruding laminates
US3565985A (en) * 1969-04-10 1971-02-23 Dow Chemical Co Method of preparing multilayer plastic articles
US3716612A (en) * 1970-01-06 1973-02-13 Dow Chemical Co Method for the formation of composite plastic bodies
US3759647A (en) * 1969-04-10 1973-09-18 Turner Alfrey Us Apparatus for the preparation of multilayer plastic articles
US3773882A (en) * 1971-10-01 1973-11-20 Dow Chemical Co Method for multilayer coextrusion
US3801429A (en) * 1969-06-06 1974-04-02 Dow Chemical Co Multilayer plastic articles
US3803429A (en) * 1972-11-07 1974-04-09 Motorola Inc Switchable frequency tone filter and detector with high speed switching capability
US3860372A (en) * 1971-02-26 1975-01-14 Dow Chemical Co Adjustable feedblock for encapsulated multilayer extrusion
US3884606A (en) * 1971-10-01 1975-05-20 Dow Chemical Co Apparatus for multilayer coextrusion of sheet or film
US4047868A (en) * 1975-08-12 1977-09-13 Toppan Printing Co., Ltd. Multilayer parison extrusion molding machine for blow molding
US4426344A (en) * 1980-07-05 1984-01-17 Hoechst Aktiengesellschaft Coextrusion process and apparatus for manufacturing multi-layered flat films of thermoplastic materials
US4472129A (en) * 1981-04-09 1984-09-18 Compagnie Francaise De Raffinage Head for extrusion of a tubular parison formed of at least one layer of material
US4496413A (en) * 1983-03-11 1985-01-29 Mobil Oil Corporation Method of forming a blocked cross-plied polymer film
US4522775A (en) * 1982-03-04 1985-06-11 American Can Company Apparatus and method for producing multilayered laminates
US4578025A (en) * 1984-11-21 1986-03-25 Kazuo Ando Die assembly for extruding multilayer parisons
US4657497A (en) * 1984-03-20 1987-04-14 Solvay & Cie (Societe Anonyme) Device for the coextrusion of thermoplastics
US4770837A (en) * 1985-01-24 1988-09-13 Mobil Oil Corporation Method for making articles from polymer blends
US4784594A (en) * 1983-03-11 1988-11-15 Mobil Oil Corporation Single lip rotary tubular extrusion die
US4798526A (en) * 1986-07-17 1989-01-17 General Electric Company Modular extrusion head
US4832589A (en) * 1984-11-28 1989-05-23 Officina Meccanica G. Prandi & C.S.P.A. Head for the circular coextrusion of a plurality of thermo-plastic material layers
US4895744A (en) * 1986-06-26 1990-01-23 General Electric Company Method of making a multi-layer parison
US4937035A (en) * 1986-10-17 1990-06-26 Richter Guenter Method for manufacturing large-volume hollow bodies of plastics material having multiple-layer walls
US5019433A (en) * 1986-06-26 1991-05-28 General Electric Corporation Multi-layer molten plastic body
US5046938A (en) * 1989-11-01 1991-09-10 Hoover Universal, Inc. Improved multiple layer die head with adjustable gaps
US5069612A (en) * 1990-09-20 1991-12-03 General Electric Corporation Modular tubular extrusion head
US5076776A (en) * 1989-02-28 1991-12-31 Mitsubishi Plastics Industries Limited Annular die for a lamination product
US5094788A (en) * 1990-12-21 1992-03-10 The Dow Chemical Company Interfacial surface generator
US5094793A (en) * 1990-12-21 1992-03-10 The Dow Chemical Company Methods and apparatus for generating interfacial surfaces
US5269995A (en) * 1992-10-02 1993-12-14 The Dow Chemical Company Coextrusion of multilayer articles using protective boundary layers and apparatus therefor
US5393216A (en) * 1990-09-20 1995-02-28 General Electric Company Modular tubular extrusion head and a process for extruding tubular articles
US5674440A (en) * 1995-05-05 1997-10-07 Graham Engineering Corporation Die head with adjustable mandrel and method
US5716650A (en) * 1995-04-24 1998-02-10 Black Clawson Sano Inc. Multilayer modular extrusion die
US5762971A (en) * 1996-10-22 1998-06-09 Schirmer; Henry G. Modular disk coextrusion die
US5779959A (en) * 1990-09-20 1998-07-14 General Electric Company Process for forming plastic articles
US5840232A (en) * 1997-06-13 1998-11-24 Wilmington Machinery, Inc. Multi-layer parison extrusion system
US6071450A (en) * 1997-12-31 2000-06-06 Kimberly-Clark Worldwide, Inc. Method for making water degradable polymer microlayer film
US6082025A (en) * 1998-09-11 2000-07-04 Nike, Inc. Flexible membranes
US6190152B1 (en) * 1996-08-26 2001-02-20 Addex, Inc. Regular division of molten extrusion flow
US6305922B1 (en) * 1991-11-14 2001-10-23 Davis-Standard Corporation Spiral fed multi-layer tubular die
US6409953B1 (en) * 1998-05-21 2002-06-25 Macro Engineering & Technology Inc. Method of extruding plastic material in multi-layer tubular form
US6413595B1 (en) * 1996-10-22 2002-07-02 Bbs Corporation Modular disk coextrusion die
US20020165523A1 (en) * 2000-03-02 2002-11-07 Chin Albert C. C. Multilayer medical device
US6638462B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die assembly
US6638463B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die module having a spillover surface surrounded by a planar seal surface
US6638461B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die module
US6638464B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die module having a spillover surface surrounding a planar seal surface
US20030201565A1 (en) * 2002-04-26 2003-10-30 Cloeren Peter F. Interface control
US20040070105A1 (en) * 2000-12-22 2004-04-15 Ole-Bendt Rasmussen Methods and apparatus for extruding a tubular film
US6837698B2 (en) * 2001-12-19 2005-01-04 3M Innovative Properties Company Multilayer coextrusion die and method
US20050003035A1 (en) * 2003-04-11 2005-01-06 Jerry Zucker Method for forming polymer materials utilizing modular die units
US6936203B2 (en) * 1999-12-20 2005-08-30 The Goodyear Tire & Rubber Company Closed die array for multi-layered articles
US20050191378A1 (en) * 2004-02-26 2005-09-01 Brenyer Jeffrey W. Tri-flow head assembly
US6951675B2 (en) * 2003-01-27 2005-10-04 Scimed Life Systems, Inc. Multilayer balloon catheter
US7097441B2 (en) * 2003-12-01 2006-08-29 Marco Engineering & Technology Inc. Annular co-extrusion die
US7105117B2 (en) * 2003-01-06 2006-09-12 General Motors Corporation Manufacturing method for increasing thermal and electrical conductivities of polymers
US7166099B2 (en) * 2003-08-21 2007-01-23 Boston Scientific Scimed, Inc. Multilayer medical devices
US20070141194A1 (en) * 2003-10-15 2007-06-21 Ingo Rubbelke Nozzle head for an extruder
US20070187856A1 (en) * 2003-11-12 2007-08-16 Mitsubishi Heavy Industries, Ltd. Multi-layered blown film forming apparatus and multi-layered blown film forming method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD137553B1 (de) * 1978-07-07 1980-12-10 Helmar Franz Rotierendes folienblaswerkzeug mit folieninnenkuehlung
US6692804B1 (en) * 1997-02-27 2004-02-17 Guill Tool & Engineering Co., Inc. High strength extruded tubular product and method for making said product
FR2794682B1 (fr) 1999-06-11 2002-06-21 Cebal Materiau barriere a micro-couches extrudees
ITBO20020708A1 (it) * 2002-11-08 2004-05-09 Techne Technipack Engineering Italia S P A Testa per la estrusione o la coestrusione di preforme
RU2329144C2 (ru) * 2004-03-16 2008-07-20 Разумков Владимир Николаевич Фильера
DE102004015551A1 (de) * 2004-03-30 2005-10-20 Guenter Richter Vorrichtung zur Herstellung schlauchartiger Vorformlinge mit asymmetrischem Ringkolben
US8876512B2 (en) 2008-09-23 2014-11-04 Cryovac, Inc. Die for coextruding a plurality of fluid layers

Patent Citations (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557265A (en) * 1967-12-29 1971-01-19 Dow Chemical Co Method of extruding laminates
US3565985A (en) * 1969-04-10 1971-02-23 Dow Chemical Co Method of preparing multilayer plastic articles
US3576707A (en) * 1969-04-10 1971-04-27 Dow Chemical Co Multilayered iridescent plastic articles
US3759647A (en) * 1969-04-10 1973-09-18 Turner Alfrey Us Apparatus for the preparation of multilayer plastic articles
US3801429A (en) * 1969-06-06 1974-04-02 Dow Chemical Co Multilayer plastic articles
US3716612A (en) * 1970-01-06 1973-02-13 Dow Chemical Co Method for the formation of composite plastic bodies
US3860372A (en) * 1971-02-26 1975-01-14 Dow Chemical Co Adjustable feedblock for encapsulated multilayer extrusion
US3884606A (en) * 1971-10-01 1975-05-20 Dow Chemical Co Apparatus for multilayer coextrusion of sheet or film
US3773882A (en) * 1971-10-01 1973-11-20 Dow Chemical Co Method for multilayer coextrusion
US3803429A (en) * 1972-11-07 1974-04-09 Motorola Inc Switchable frequency tone filter and detector with high speed switching capability
US4047868A (en) * 1975-08-12 1977-09-13 Toppan Printing Co., Ltd. Multilayer parison extrusion molding machine for blow molding
US4426344A (en) * 1980-07-05 1984-01-17 Hoechst Aktiengesellschaft Coextrusion process and apparatus for manufacturing multi-layered flat films of thermoplastic materials
US4472129A (en) * 1981-04-09 1984-09-18 Compagnie Francaise De Raffinage Head for extrusion of a tubular parison formed of at least one layer of material
US4522775A (en) * 1982-03-04 1985-06-11 American Can Company Apparatus and method for producing multilayered laminates
US4784594A (en) * 1983-03-11 1988-11-15 Mobil Oil Corporation Single lip rotary tubular extrusion die
US4496413A (en) * 1983-03-11 1985-01-29 Mobil Oil Corporation Method of forming a blocked cross-plied polymer film
US4657497A (en) * 1984-03-20 1987-04-14 Solvay & Cie (Societe Anonyme) Device for the coextrusion of thermoplastics
US4578025A (en) * 1984-11-21 1986-03-25 Kazuo Ando Die assembly for extruding multilayer parisons
US4832589A (en) * 1984-11-28 1989-05-23 Officina Meccanica G. Prandi & C.S.P.A. Head for the circular coextrusion of a plurality of thermo-plastic material layers
US4770837A (en) * 1985-01-24 1988-09-13 Mobil Oil Corporation Method for making articles from polymer blends
US4895744A (en) * 1986-06-26 1990-01-23 General Electric Company Method of making a multi-layer parison
US5019433A (en) * 1986-06-26 1991-05-28 General Electric Corporation Multi-layer molten plastic body
US4798526A (en) * 1986-07-17 1989-01-17 General Electric Company Modular extrusion head
US4937035A (en) * 1986-10-17 1990-06-26 Richter Guenter Method for manufacturing large-volume hollow bodies of plastics material having multiple-layer walls
US5076776A (en) * 1989-02-28 1991-12-31 Mitsubishi Plastics Industries Limited Annular die for a lamination product
US5046938A (en) * 1989-11-01 1991-09-10 Hoover Universal, Inc. Improved multiple layer die head with adjustable gaps
US5069612A (en) * 1990-09-20 1991-12-03 General Electric Corporation Modular tubular extrusion head
US5393216A (en) * 1990-09-20 1995-02-28 General Electric Company Modular tubular extrusion head and a process for extruding tubular articles
US5779959A (en) * 1990-09-20 1998-07-14 General Electric Company Process for forming plastic articles
US5094788A (en) * 1990-12-21 1992-03-10 The Dow Chemical Company Interfacial surface generator
US5094793A (en) * 1990-12-21 1992-03-10 The Dow Chemical Company Methods and apparatus for generating interfacial surfaces
US6305922B1 (en) * 1991-11-14 2001-10-23 Davis-Standard Corporation Spiral fed multi-layer tubular die
US5269995A (en) * 1992-10-02 1993-12-14 The Dow Chemical Company Coextrusion of multilayer articles using protective boundary layers and apparatus therefor
US5716650A (en) * 1995-04-24 1998-02-10 Black Clawson Sano Inc. Multilayer modular extrusion die
US5674440A (en) * 1995-05-05 1997-10-07 Graham Engineering Corporation Die head with adjustable mandrel and method
US6926858B2 (en) * 1996-08-26 2005-08-09 Addex, Inc. Method and apparatus for regular division of molten extrusion flow
US6190152B1 (en) * 1996-08-26 2001-02-20 Addex, Inc. Regular division of molten extrusion flow
US6471502B2 (en) * 1996-08-26 2002-10-29 Addex, Inc. Regular division of molten extrusion flow
US7150848B2 (en) * 1996-08-26 2006-12-19 Addex, Inc. Method and apparatus for regular division of molten extrusion flow
US6000926A (en) * 1996-10-22 1999-12-14 Schirmer; Henry G. Modular disk coextrusion die
US5762971A (en) * 1996-10-22 1998-06-09 Schirmer; Henry G. Modular disk coextrusion die
US6413595B1 (en) * 1996-10-22 2002-07-02 Bbs Corporation Modular disk coextrusion die
US5840232A (en) * 1997-06-13 1998-11-24 Wilmington Machinery, Inc. Multi-layer parison extrusion system
US6071450A (en) * 1997-12-31 2000-06-06 Kimberly-Clark Worldwide, Inc. Method for making water degradable polymer microlayer film
US6409953B1 (en) * 1998-05-21 2002-06-25 Macro Engineering & Technology Inc. Method of extruding plastic material in multi-layer tubular form
US6082025A (en) * 1998-09-11 2000-07-04 Nike, Inc. Flexible membranes
US6936203B2 (en) * 1999-12-20 2005-08-30 The Goodyear Tire & Rubber Company Closed die array for multi-layered articles
US20020165523A1 (en) * 2000-03-02 2002-11-07 Chin Albert C. C. Multilayer medical device
US20040070105A1 (en) * 2000-12-22 2004-04-15 Ole-Bendt Rasmussen Methods and apparatus for extruding a tubular film
US6638463B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die module having a spillover surface surrounded by a planar seal surface
US6638464B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die module having a spillover surface surrounding a planar seal surface
US6638461B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die module
US6638462B2 (en) * 2001-07-27 2003-10-28 Pechiney Emballage Flexible Europe Hybrid disk-cone extrusion die assembly
US6837698B2 (en) * 2001-12-19 2005-01-04 3M Innovative Properties Company Multilayer coextrusion die and method
US6905324B2 (en) * 2002-04-26 2005-06-14 Cloeren Incorporated Interface control
US20050029691A1 (en) * 2002-04-26 2005-02-10 Cloeren Peter F. Interface control
US20060055076A1 (en) * 2002-04-26 2006-03-16 Interface Incorporated Method and apparatus for orienting layers in mulitlayered composites
US20030201565A1 (en) * 2002-04-26 2003-10-30 Cloeren Peter F. Interface control
US7105117B2 (en) * 2003-01-06 2006-09-12 General Motors Corporation Manufacturing method for increasing thermal and electrical conductivities of polymers
US6951675B2 (en) * 2003-01-27 2005-10-04 Scimed Life Systems, Inc. Multilayer balloon catheter
US20050003035A1 (en) * 2003-04-11 2005-01-06 Jerry Zucker Method for forming polymer materials utilizing modular die units
US7166099B2 (en) * 2003-08-21 2007-01-23 Boston Scientific Scimed, Inc. Multilayer medical devices
US20070141194A1 (en) * 2003-10-15 2007-06-21 Ingo Rubbelke Nozzle head for an extruder
US20070187856A1 (en) * 2003-11-12 2007-08-16 Mitsubishi Heavy Industries, Ltd. Multi-layered blown film forming apparatus and multi-layered blown film forming method
US7097441B2 (en) * 2003-12-01 2006-08-29 Marco Engineering & Technology Inc. Annular co-extrusion die
US20050191378A1 (en) * 2004-02-26 2005-09-01 Brenyer Jeffrey W. Tri-flow head assembly

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8876512B2 (en) 2008-09-23 2014-11-04 Cryovac, Inc. Die for coextruding a plurality of fluid layers
US20100173031A1 (en) * 2008-09-23 2010-07-08 Roberts Lawrence E Die, system, and method for coextruding a plurality of fluid layers
US20100227136A1 (en) * 2009-03-06 2010-09-09 Cryovac, Inc. Multilayer, Heat-Shrinkable Film Comprising a Plurality of Microlayers
US8012572B2 (en) 2009-03-06 2011-09-06 Cryovac, Inc. Multilayer, heat-shrinkable film comprising a plurality of microlayers
US8409697B2 (en) 2009-03-06 2013-04-02 Cryovac, Inc. Multilayer, heat-shrinkable film comprising a plurality of microlayers
US8080310B2 (en) 2009-03-06 2011-12-20 Cryovac, Inc. Multilayer, heat-shrinkable film comprising a plurality of microlayers
US8241736B2 (en) 2009-03-06 2012-08-14 Cryovac, Inc. Multilayer, heat-shrinkable film comprising a plurality of microlayers
US20120273991A1 (en) * 2009-11-20 2012-11-01 Weiman Yang Apparatus and method for preparing laminated nano-composite material
US9079346B2 (en) * 2009-11-20 2015-07-14 Beijing University Of Chemical Technology Apparatus and method for preparing laminated nano-composite material
US20110229722A1 (en) * 2010-03-18 2011-09-22 Cryovac, Inc. Multilayer Oxygen Barrier Film Comprising a Plurality of Adjoining Microlayers Comprising Ethylene/Vinyl Alcohol Copolymer
US20110229701A1 (en) * 2010-03-18 2011-09-22 Cryovac, Inc. Multilayer Active Oxygen Barrier Film Comprising a Plurality of Microlayers
WO2012129046A1 (en) 2011-03-18 2012-09-27 The Procter & Gamble Company Reinforced multi-layer polymeric films and methods of forming same
WO2012129045A1 (en) 2011-03-18 2012-09-27 The Procter & Gamble Company Multi-layer polymeric films and methods of forming same
US8870561B2 (en) * 2012-03-16 2014-10-28 Bbs Corporation Layer sequence repeater module for a modular disk co-extrusion die and products thereof
US20130243894A1 (en) * 2012-03-16 2013-09-19 Bbs Corporation Layer sequence repeater module for a modular disk co-extrusion die and products thereof
WO2015054350A1 (en) 2013-10-11 2015-04-16 The Procter & Gamble Company Multi-layer polymeric films
DE102015001022A1 (de) * 2015-01-29 2016-07-14 Reifenhäuser GmbH & Co. KG Maschinenfabrik Blaskopf, Verfahren zum Herstellen einer Blasfolie sowie Blasfolienanlage
WO2016119767A1 (de) * 2015-01-29 2016-08-04 Reifenhäuser GmbH & Co. KG Maschinenfabrik Blaskopf, verfahren zum herstellen einer blasfolie sowie blasfolienanlage
EP3072686A1 (en) 2015-03-26 2016-09-28 The Procter and Gamble Company Multi-layer polymeric films
WO2016153833A1 (en) 2015-03-26 2016-09-29 The Procter & Gamble Company Multilayer polymeric films
DE102016012388A1 (de) 2016-10-18 2018-04-19 Reifenhäuser GmbH & Co. KG Maschinenfabrik Verteilerplattenpaket für einen blaskopf einer blasfolienanlage, blaskopf, verfahren zum herstellen einer folie im blasfolienverfahren, verfahren zum umrüsten eines blaskopfes sowie blasfolienanlage
US11090853B2 (en) 2019-06-14 2021-08-17 Bbs Corporation Modular disk coextrusion die with opposing disk arrangement
US11220035B2 (en) 2019-06-14 2022-01-11 Henry G. Schirmer Complex films made from modular disk coextrusion die with opposing disk arrangement
US11173642B1 (en) 2021-04-09 2021-11-16 Bbs Corporation Blown film coextrusion line with polygonal extruder arrangement
US11338490B1 (en) 2021-04-09 2022-05-24 Bbs Corporation Blown film coextrusion line with polygonal extruder arrangement
US11440233B1 (en) 2021-04-09 2022-09-13 Bbs Corporation Blown film coextrusion line with polygonal extruder arrangement
US11511474B1 (en) 2021-05-17 2022-11-29 Henry G. Schirmer Modular disk coextrusion die with melt channeling disk

Also Published As

Publication number Publication date
EP2326481A2 (en) 2011-06-01
WO2010039173A3 (en) 2011-01-27
RU2011115883A (ru) 2012-10-27
CN102223995B (zh) 2017-06-27
US8821775B2 (en) 2014-09-02
BRPI0918976B8 (pt) 2022-10-04
BRPI0918976A2 (pt) 2015-12-01
US20130149403A1 (en) 2013-06-13
AU2009300410A1 (en) 2010-04-08
US8821145B2 (en) 2014-09-02
WO2010039173A2 (en) 2010-04-08
US20130140732A1 (en) 2013-06-06
AU2009300410B2 (en) 2014-05-08
CN102223995A (zh) 2011-10-19
EP2326481B1 (en) 2018-05-16
BRPI0918976B1 (pt) 2019-07-09
RU2500532C2 (ru) 2013-12-10
NZ591629A (en) 2013-04-26

Similar Documents

Publication Publication Date Title
US8821145B2 (en) Die for coextruding a plurality of fluid layers
US8876512B2 (en) Die for coextruding a plurality of fluid layers
US10611129B2 (en) Method for making multilayer coextruded films using a layer sequence repeater module
EP2403703B2 (en) Multilayer, heat-shrinkable film comprising a plurality of microlayers and method for its fabrication
CN1492802A (zh) 管式多层膜及其制备方法和设备
JPH05237910A (ja) 多層管状製品の螺旋送りダイス装置
KR101824294B1 (ko) 동심형 공압출 다이 및 다층 열가소성 필름의 압출 방법
CA2541650A1 (en) Modules for c0-extrusion dies
CA1141916A (en) Tubular extrusion apparatus and method
JP4985330B2 (ja) 多層フィルムブロー成形用の金型装置
EP3237207A1 (en) Multilayer, heat-shrinkable film comprising a plurality of microlayers
EP2654992B1 (en) Multi-segment, heat-shrinkable barrier film comprising a plurality of microlayers
WO2019028544A1 (en) COEXTRUSION CHUCK WITH RESIN CHANNEL FOR EXTRUSION CHAIN
JPH05131523A (ja) 環状樹脂積層ダイ

Legal Events

Date Code Title Description
AS Assignment

Owner name: CRYOVAC, INC.,SOUTH CAROLINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ROBERTS, LAWRENCE E.;TIMMONS, ANTON L.;WEBSTER, BRADFORD E.;REEL/FRAME:021654/0994

Effective date: 20080923

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION