US20080260978A1 - Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced - Google Patents

Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced Download PDF

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Publication number
US20080260978A1
US20080260978A1 US11/785,750 US78575007A US2008260978A1 US 20080260978 A1 US20080260978 A1 US 20080260978A1 US 78575007 A US78575007 A US 78575007A US 2008260978 A1 US2008260978 A1 US 2008260978A1
Authority
US
United States
Prior art keywords
preform
layer
container
outer layer
layers
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
US11/785,750
Other languages
English (en)
Inventor
Sarah Van Hove
Daniel Peirsman
Rudi Verpoorten
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.)
Anheuser Busch InBev SA
Original Assignee
Anheuser Busch InBev SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39629127&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20080260978(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Anheuser Busch InBev SA filed Critical Anheuser Busch InBev SA
Priority to US11/785,750 priority Critical patent/US20080260978A1/en
Priority to BRPI0810428-0A2A priority patent/BRPI0810428A2/pt
Priority to NZ580022A priority patent/NZ580022A/en
Priority to US12/450,892 priority patent/US9162372B2/en
Priority to PCT/EP2008/054772 priority patent/WO2008129018A1/fr
Priority to UAA200910388A priority patent/UA96624C2/ru
Priority to ES08749615.4T priority patent/ES2687437T3/es
Priority to KR1020157018104A priority patent/KR101901197B1/ko
Priority to RU2009142613/05A priority patent/RU2470778C2/ru
Priority to CA2681777A priority patent/CA2681777C/fr
Priority to MEP-2009-309A priority patent/ME00940B/fr
Priority to AU2008240668A priority patent/AU2008240668B2/en
Priority to EP08749615.4A priority patent/EP2146832B1/fr
Priority to DK08749615.4T priority patent/DK2146832T3/en
Priority to CN2008800126214A priority patent/CN101663141B/zh
Priority to KR1020097022513A priority patent/KR101737357B1/ko
Priority to ARP080101653A priority patent/AR063001A1/es
Publication of US20080260978A1 publication Critical patent/US20080260978A1/en
Priority to US14/887,189 priority patent/US20160244205A1/en
Priority to US16/440,744 priority patent/US20190291923A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/02—Linings or internal coatings
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0408—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
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    • B29C45/34—Moulds having venting means
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    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0055—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
    • 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
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    • B29C45/16—Making multilayered or multicoloured articles
    • B29C2045/1601—Making multilayered or multicoloured articles the injected materials not being adhered or bonded to each other
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
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    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
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    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/244—All polymers belonging to those covered by group B32B27/36
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the present invention relates in general to new developments in dispensing bag-in-containers and, in particular, to Integral two layer preforms particularly advantageous for the production of integrally blow-moulded bag-in-containers. It also relates to a method for producing said preforms and bag-in-containers.
  • Bag-in-containers also referred to as bag-in-bottles or bag-in-boxes depending on the geometry of the outer vessel, all terms considered herein as being comprised within the meaning of the term bag-in-container, are a family of liquid dispensing packaging consisting of an outer container comprising an opening to the atmosphere the mouth and which contains a collapsible inner bag joined to said container and opening to the atmosphere at the region of said mouth.
  • the system must comprise at least one vent fluidly connecting the atmosphere to the region between the inner bag and the outer container in order to control the pressure in said region to squeeze the inner bag and thus dispense the liquid contained therein.
  • bag-in-containers were and still are produced by independently producing an inner bag provided with a specific neck closure assembly and a structural container (usually in the form of a bottle).
  • the bag is inserted into the fully formed bottle opening and fixed thereto by means of the neck closure assembly, which comprises one opening to the interior of the bag and vents fluidly connecting the space between bag and bottle to the atmosphere; examples of such constructions can be found inter alia in U.S. Pat. No. 3,484,011, U.S. Pat. No. 3,450,254, U.S. Pat. No. 4,330,066, and U.S. Pat. No. 4,892,230.
  • These types of bag-in-containers have the advantage of being reusable, but they are very expensive and labour-intensive to produce.
  • the multilayer preform may be extruded or injection moulded (cf. U.S. Pat. No. 6,238,201, JPA10128833, JPA11010719, JPA9208688, U.S. Pat. No. 6,649,121).
  • the former method is advantageous in terms of productivity, the latter is preferable when wall thickness accuracy is required, typically in containers for dispensing beverage.
  • Preforms for the production of integrally blow-moulded bag-in-containers clearly differ from preforms for the production of blow-moulded co-layered containers, wherein the various layers of the container are not meant to delaminate, in the thickness of the layers.
  • a bag-in-container is comprised of an outer structural envelope containing a flexible, collapsible bag. It follows that the outer layer of the container is substantially thicker than the inner bag. This same relationship can of course be found in the preform as well, which are characterized by an inner layer being substantially thinner than the outer layer. Moreover, in some cases, the preform already comprised vents which are never present in preforms for the production of co-layered containers (cf. EPA1356915).
  • the preform usually consists of an assembly of two separate preforms and produced independently from one another and thereafter assembled such that the inner preform fits into the outer preform as illustrated in JPA10180853.
  • This solution allows for greater freedom in the design of the neck and vents, as well as in the choice of materials for the inner and outer layers: the compatibility in terms of processing between the materials of the inner and outer layers concern the blow-moulding operation only. It is, however, expensive as it requires two separate production lines and an assembly line.
  • EPA1356915 and U.S. Pat. No. 6,649,121 proposes that the materials for the inner and outer layers of the preform should be selected such that the melting temperature of the outer layer is higher than the one of the inner layer, T m,outer >T m,inner , lest a strong bond would form between layers when the inner layer is injection moulded over the outer layer, which had been injected into the mould cavity first.
  • materials for the outer layer given by the authors include PET and EVOH, whilst polyethylene is given as an example for the inner layer.
  • the present invention is defined in the appended independent claims. Preferred embodiments are defined in the dependent claims.
  • the present invention relates to an integral two-layer preform and a bag-in-container produced by blow-moulding the preform, the preform comprising an inner layer and an outer layer, wherein the preform forms a two layer container upon blow-moulding, and wherein the thus obtained inner layer of said container releases from the thus obtained outer layer upon introduction of a gas at a point of interface of the two layers.
  • the melting temperature of the inner layer is greater or equal to the melting temperature of the outer layer.
  • the preform comprises at least one interface vent running parallel to the interface between the inner and outer layer, and opening to the atmosphere at a location adjacent to, and oriented coaxially with the preform's mouth.
  • melting temperature of the inner layer is greater or
  • the foregoing process is advantageously carried out for the production of said preform comprising at least one interface vent, by using a tool of the core-shell type, characterized in that it comprises a core mould provided at the base thereof with at least one pin, preferably wedge shaped, suitable for forming a vent at the interface between the first and second layers of said preform.
  • the invention further addresses an apparatus for producing a preform as defined above of comprising:
  • FIG. 1 is a schematic cross-sectional representation of a preform and the bag-in-container obtained after blow-moulding thereof.
  • FIG. 2 is a cutaway perspective view of the mouth and neck region of a preform or bag-in-container according to a preferred embodiment of the present invention.
  • FIGS. 1A and 1B there is illustrated an integrally blow-moulded bag-in-container ( 2 ) and a preform ( 1 )&( 1 ′) for its manufacturing.
  • the preform ( 1 ) comprises an inner layer ( 11 ) and an outer layer ( 12 ) joined at least at the level of the neck region ( 6 ) by an interface (shown on the right hand side).
  • the region between inner and outer layers( 11 ) and ( 12 ) may either consist of an interface ( 14 ) wherein the two layers are substantially contacting each other, or comprise a gap ( 14 ′) in fluid communication with at least one vent ( 3 ) opening to the atmosphere in ( 4 ).
  • vent geometries have been disclosed and it is not critical which geometry is selected. It is preferred, however, that the vent be located adjacent to, and oriented coaxially with said preform's mouth ( 5 ) as illustrated in FIG. 1 . More preferably, the vents have the shape of a wedge with the broad side at the level of the opening ( 4 ) thereof and getting thinner as it penetrates deeper into the vessel, until the two layers meet to form an interface ( 14 ) at least at the level of the neck region as illustrated in FIG. 2 .
  • This geometry allows for a more efficient and reproducible delamination of the inner bag upon use of the bag-in-container.
  • the container may comprise one or several vents evenly distributed around the lip of the bag-in-container's mouth.
  • vents are advantageous as they permit the interface of the inner and outer layers( 21 ) and ( 22 ) of the bag-in-container ( 2 ) to release more evenly upon blowing pressurized gas through said vents.
  • the preform comprises two vents opening at the vessel's mouth lip at diametrically opposed positions. More preferably, three, and most preferably, at least four vents open at regular intervals of the mouth lip.
  • the preform of the present invention consists of an integral preform obtained by injection moulding one layer on top of the other.
  • This solution offers a number of advantages over preform assemblies, like for instance, that it requires no assembly step and one production station only is sufficient for the integral preform fabrication when at least two are required for a preform assembly.
  • Preferred materials for the layers of the preform and bag-in-container of the present invention are polyesters like PET, PEN, PTT, PTN; polyamides like PA6, PA66, PA11, PA12; polyolefins like PE, PP; EVOH; biodegradable polymers like polyglycol acetate (PGAc), Polylactic acid (PLA); and copolymers and blends thereof.
  • the requirement according to the present invention for the materials of the inner and outer layers is that the melting temperature of the outer layer is lower than, or equal to the one of the inner layer, T m,outer ⁇ T m,inner . This condition is exactly the opposite to the one taught in EPA1356915 and U.S. Pat. No. 6,649,121.
  • the integral preform can advantageously be produced with the following sequential steps:
  • a bag-in-container must comprise at least one interface vent fluidly connecting the interface between inner and outer layers to the atmosphere.
  • the assembled (i.e., not integrally blow-moulded) bag-in-containers used to date traditionally and for practical reasons, are provided with vents located adjacent to, and oriented coaxially with the bag-in-container's mouth.
  • the same vents location is preferably maintained.
  • the present process allows to provide integral preforms with vents fluidly connecting the interface between inner and outer layers to the atmosphere, provided an appropriate tool is used.
  • the tool is of the core-shell type and comprises a core mould provided at the base thereof with at least one pin suitable for forming a vent at the interface between the first and second layers of the preform.
  • the core may comprise a single pin, but it preferably comprises more than one pin in order to have several vents opening around the lip of the container's mouth.
  • the pins preferably have the shape of a wedge as, on the one hand, a wedge shaped vent has the advantages discussed above and, on the other hand, it allows for easier extraction of the thus produced integral preform from the mould core.
  • the dimensions of the pins depend on the size of the bag-in-container and, in particular, of the mouth and lip thereof.
  • the pins have a height of about 5 to 75 mm, preferably 5 to 50 mm, most preferably 10 to 20 mm and their base, forming the vents openings, preferably are in the shape of an arc section of length comprised between 3 and 15 mm, preferably 5 and 10 mm and of width comprised between 0.5 and 5 mm, preferably 0.5 and 2 mm.
  • the integral preform of the present invention comprises mechanical interlocking means ( 8 ) for fixing the inner layer to the outer layer. This allows an easier and safer handling of the preform and facilitates the extraction of the preform from the injection moulding core.
  • the preform of the present invention can be produced semicontinuously with an apparatus comprising:
  • the apparatus of the present invention may include a separate extraction station, for example to allow further cooling of the part prior to extraction or, if the preform is extracted upon opening the mould after the injection of the second layer, it may well do without one.
  • the means for moving the support means from one shell mould to the other and, optionally, to the extraction station may be linear, using a “shuttle,” or rotational, using a “carrousel.”
  • the two layers ( 11 ) and ( 12 ) of the preform according to the present invention are connected by an interface ( 14 ) throughout substantially the whole inner surface of the outer layer.
  • the inner and outer layers of the preform may adhere at said interface ( 14 )
  • the inner and outer layers ( 21 ) and ( 22 ) of the bag-in-container ( 2 ) produced by blow-moulding the preform ( 1 ) do delaminate upon injection of a pressurized gas at a point of the interface. It is generally believed that better results are obtained when at least one of the inner and outer layers comprises a semi-crystalline polymer.
  • the bag-in-container ( 2 ) of the present invention can be obtained by providing a preform as described above; bringing said preform to blow-moulding temperature; fixing the thus heated preform at the level of the neck region with fixing means in the blow-moulding tool; and blow-moulding the thus heated preform to form a bag-in-container.
  • the inner and outer layers ( 21 ) and ( 22 ) of the thus obtained bag-in-container are connected to one another by an interface ( 24 ) over substantially the whole of the inner surface of the outer layer.
  • Said interface ( 24 ) is in fluid communication with the atmosphere through the vents( 3 ), which maintained their original geometry through the blow-moulding process since the neck region of the preform where the vents are located is held firm by the fixing means and is not stretched during blowing.
  • the interface ( 24 ) between inner and outer layers ( 21 ) and ( 22 ) releases upon blowing pressurized gas through the vents in a consistent and reproducible manner.
  • the success of said operation depends on a number of parameters, in particular, on the interfacial adhesive strength, the number, geometry, and distribution of the vents, and on the pressure of the gas injected.
  • the interfacial strength is of course a key issue and can be modulated by the choice of the material for the inner and outer layers, and by the process parameters during blow-moulding; the pressure-time-temperature window used is of course of prime importance and greatly depends on the material selected for the inner and outer layers.
  • a preform according to the present invention was produced by injecting a melt into a first mould cavity cooled to form the preform's inner layer.
  • the core comprising the inner layer was moved to a second cavity cooled at the same temperature as the first one, and a melt was injected over the inner layer present in the cavity and the preform was extracted. It comprised vents ( 3 ) and interlocking means ( 8 ) as illustrated in FIG. 2 .
  • the preform produced as explained above was heated in an oven comprising an array of IR-lamps and then fixed into a blow-moulding mould which walls were maintained at a desired temperature. Air was blown into the preform under pressure.
  • the thus produced bag-in-container was then filled with a liquid and connected to an appliance for dispensing beverage comprising a source of compressed air in order to determine the delamination pressure.
  • the delamination pressure was determined as follows. The interface vents of the bag-in-container were connected to the source of compressed air. Air was injected through the vents at a constant pressure and the interface between inner and outer layers was observed; the pressure was increased stepwise until delamination pressure was reached. Delamination pressure is defined as the pressure at which the inner bag separates from the outer layer over the whole of their interface and collapses. The surfaces of the thus separated layers were examined for traces of bonding.
  • the delamination pressure of the bag-in-container described above was of about 05 ⁇ 0.1 bar overpressure and showed little trace of cohesive fracture between the inner and outer layers. This example demonstrates that bag-in-containers of excellent quality can be produced with integral preforms according to the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
US11/785,750 2007-04-19 2007-04-19 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced Abandoned US20080260978A1 (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
US11/785,750 US20080260978A1 (en) 2007-04-19 2007-04-19 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
KR1020097022513A KR101737357B1 (ko) 2007-04-19 2008-04-18 일체형 2층 프리폼, 그의 생산을 위한 방법 및 장치, 블로우 성형된 백-인-컨테이너의 생산방법, 그리고 이렇게 생산된 백-인-컨테이너
RU2009142613/05A RU2470778C2 (ru) 2007-04-19 2008-04-18 Составная двухслойная преформа, способ и устройство для ее изготовления, способ изготовления упаковки "bag-in-container" методом выдувного формования и упаковка "bag-in-container", производимая этим способом
MEP-2009-309A ME00940B (fr) 2007-04-19 2008-04-18 Préforme à deux couches d'un seul tenant, procédé et appareil pour la production de celle-ci, procédé pour la production d'une caisse-outre moulée par soufflage, et caisse-outre ainsi obtenue
US12/450,892 US9162372B2 (en) 2007-04-19 2008-04-18 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
PCT/EP2008/054772 WO2008129018A1 (fr) 2007-04-19 2008-04-18 Préforme à deux couches d'un seul tenant, procédé et appareil pour la production de celle-ci, procédé pour la production d'une caisse-outre moulée par soufflage, et caisse-outre ainsi obtenue
UAA200910388A UA96624C2 (ru) 2007-04-19 2008-04-18 Интегральная двухслойная преформа для изготовления «баллонов в контейнере», процесс ее изготовления, инструмент типа обечайки сердечника, предназначенный для изготовления преформы, сформированный раздувом в виде одного целого, «баллон в контейнере»
ES08749615.4T ES2687437T3 (es) 2007-04-19 2008-04-18 Preforma integral de dos capas, proceso, herramienta y aparato para la producción de esta y bolsa en contenedor producida de esta manera
KR1020157018104A KR101901197B1 (ko) 2007-04-19 2008-04-18 일체형 2층 프리폼, 그의 생산을 위한 방법 및 장치, 블로우 성형된 백-인-컨테이너의 생산방법, 그리고 이렇게 생산된 백-인-컨테이너
BRPI0810428-0A2A BRPI0810428A2 (pt) 2007-04-19 2008-04-18 Pré-forma integral de duas camadas, processo e aparelho para a produção da mesma, processo para a produção de um saco em recipiente moldado a sopro e saco em recipiente assim produzido
CA2681777A CA2681777C (fr) 2007-04-19 2008-04-18 Preforme a deux couches d'un seul tenant, procede et appareil pour la production de celle-ci, procede pour la production d'une caisse-outre moulee par soufflage, et caisse-outre ainsi obtenue
NZ580022A NZ580022A (en) 2007-04-19 2008-04-18 Integral two layer preform for bag in container with layers releasable from each other by introduction of gas and melting temperature of inner layer not less than outer layer
AU2008240668A AU2008240668B2 (en) 2007-04-19 2008-04-18 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in container, and bag-in-container thus produced
EP08749615.4A EP2146832B1 (fr) 2007-04-19 2008-04-18 Préforme à deux couches surmoulées, procédé, outil et appareil pour la production de celle-ci, récipient à sachet intérieur ainsi obtenu
DK08749615.4T DK2146832T3 (en) 2007-04-19 2008-04-18 INTEGRATED TWO LAYER PREFERENCE, PROCEDURE, TOOL AND DEVICE FOR MANUFACTURING THEREOF AND SO PREPARED POSE-I CONTAINER
CN2008800126214A CN101663141B (zh) 2007-04-19 2008-04-18 一体两层预制坯、用于生产其的方法和设备、用于生产吹塑内装袋容器的方法、以及因此生产出的内装袋容器
ARP080101653A AR063001A1 (es) 2007-04-19 2008-04-21 Preforma integral de capas proceso y aparato para la produccion de la misma, proceso para producir un contenedor con bolsa interior moldeado por soplado y contenedor con bolsa interior asi producido
US14/887,189 US20160244205A1 (en) 2007-04-19 2015-10-19 Integral Two Layer Preform, Process and Apparatus for the Production Thereof, Process for Producing a Blow-Moulded Bag-in-Container, and Bag-in-Container Thus Produced
US16/440,744 US20190291923A1 (en) 2007-04-19 2019-06-13 Integral Two Layer Preform, Process and Apparatus for the Production Thereof, Process for Producing a Blow-Moulded Bag-in-Container, and Bag-in-Container Thus Produced

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/785,750 US20080260978A1 (en) 2007-04-19 2007-04-19 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US12/450,892 Continuation US9162372B2 (en) 2007-04-19 2008-04-18 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
US12/450,892 Continuation-In-Part US9162372B2 (en) 2007-04-19 2008-04-18 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
PCT/EP2008/054772 Continuation-In-Part WO2008129018A1 (fr) 2007-04-19 2008-04-18 Préforme à deux couches d'un seul tenant, procédé et appareil pour la production de celle-ci, procédé pour la production d'une caisse-outre moulée par soufflage, et caisse-outre ainsi obtenue

Publications (1)

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US20080260978A1 true US20080260978A1 (en) 2008-10-23

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US11/785,750 Abandoned US20080260978A1 (en) 2007-04-19 2007-04-19 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
US12/450,892 Expired - Fee Related US9162372B2 (en) 2007-04-19 2008-04-18 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
US14/887,189 Abandoned US20160244205A1 (en) 2007-04-19 2015-10-19 Integral Two Layer Preform, Process and Apparatus for the Production Thereof, Process for Producing a Blow-Moulded Bag-in-Container, and Bag-in-Container Thus Produced
US16/440,744 Abandoned US20190291923A1 (en) 2007-04-19 2019-06-13 Integral Two Layer Preform, Process and Apparatus for the Production Thereof, Process for Producing a Blow-Moulded Bag-in-Container, and Bag-in-Container Thus Produced

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US12/450,892 Expired - Fee Related US9162372B2 (en) 2007-04-19 2008-04-18 Integral two layer preform, process and apparatus for the production thereof, process for producing a blow-moulded bag-in-container, and bag-in-container thus produced
US14/887,189 Abandoned US20160244205A1 (en) 2007-04-19 2015-10-19 Integral Two Layer Preform, Process and Apparatus for the Production Thereof, Process for Producing a Blow-Moulded Bag-in-Container, and Bag-in-Container Thus Produced
US16/440,744 Abandoned US20190291923A1 (en) 2007-04-19 2019-06-13 Integral Two Layer Preform, Process and Apparatus for the Production Thereof, Process for Producing a Blow-Moulded Bag-in-Container, and Bag-in-Container Thus Produced

Country Status (15)

Country Link
US (4) US20080260978A1 (fr)
EP (1) EP2146832B1 (fr)
KR (2) KR101901197B1 (fr)
CN (1) CN101663141B (fr)
AR (1) AR063001A1 (fr)
AU (1) AU2008240668B2 (fr)
BR (1) BRPI0810428A2 (fr)
CA (1) CA2681777C (fr)
DK (1) DK2146832T3 (fr)
ES (1) ES2687437T3 (fr)
ME (1) ME00940B (fr)
NZ (1) NZ580022A (fr)
RU (1) RU2470778C2 (fr)
UA (1) UA96624C2 (fr)
WO (1) WO2008129018A1 (fr)

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US20100239799A1 (en) * 2007-04-19 2010-09-23 Inbev S.A. Integrally blow-moulded bag-in-container having an inner layer and the outer layer made of the same material and preform for making it
US20100276447A1 (en) * 2009-04-30 2010-11-04 Ms. Orsola Patrini Container associable with airless pumps and method for its production
US20110024380A1 (en) * 2009-07-30 2011-02-03 Lumson S.P.A. container associable with airless pumps and method for its production
EP2508319A1 (fr) * 2011-04-07 2012-10-10 Anheuser-Busch InBev NV Préforme pour mouler un bag-in-box par soufflage, procédé de fabrication d'un bag-in-box et bag-in-box
EP2508318A1 (fr) * 2011-04-07 2012-10-10 Anheuser-Busch InBev NV Préforme pour mouler un bag-in-box par soufflage, procédé de fabrication d'un bag-in-box et bag-in-box
US20130193164A1 (en) * 2010-10-11 2013-08-01 Advanced Technology Materials, Inc. Substantially rigid collapsible liner, container and/or liner for replacing glass bottles, and enhanced flexible liners
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US20190291923A1 (en) 2019-09-26
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US20160244205A1 (en) 2016-08-25
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AU2008240668B2 (en) 2012-08-16
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US20100330313A1 (en) 2010-12-30
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CN101663141A (zh) 2010-03-03
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AR063001A1 (es) 2008-12-23
ME00940B (fr) 2012-06-20
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RU2470778C2 (ru) 2012-12-27
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