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

• US 9,162,372 B2
• Filed: 04/18/2008
• Issued: 10/20/2015
• Est. Priority Date: 04/19/2007
• Status: Expired due to Fees

• Current Assignee: Anheuser-Busch InBev SA/NV
• Original Assignee: Anheuser-Busch InBev SA/NV
• Inventors: Van Hove, Sarah, Peirsman, Daniel, Verpoorten, Rudi
• Primary Examiner(s): Lan, Yan
• Application Number:
  US12/450,892
• Publication Number:
  US 20100330313A1
• Time in Patent Office: 2,741 Days
• Field of Search: 428/34.1, 428/35.7, 220/495.06, 220/62.11
• US Class Current: 1/1
• CPC Class Codes: B29B 11/08 Injection moulding
• CPC Class Codes: B29B 11/14 characterised by structure or composition
• CPC Class Codes: B29C 2045/1601 the injected materials not being adhered or bonded to each other B29C45/0017 takes precedence
• CPC Class Codes: B29C 2949/0715 the preform having one end closed
• CPC Class Codes: B29C 2949/072 having variable wall thickness
• CPC Class Codes: B29C 2949/073 having variable diameter
• CPC Class Codes: B29C 2949/0773 Threads
• CPC Class Codes: B29C 2949/3008 at neck portion
• CPC Class Codes: B29C 2949/3012 at flange portion
• CPC Class Codes: B29C 2949/3016 at body portion
• CPC Class Codes: B29C 2949/302 at bottom portion
• CPC Class Codes: B29C 2949/3026 having two or more components
• CPC Class Codes: B29C 2949/3032 having components being injected
• CPC Class Codes: B29C 2949/3034 having two or more components being injected
• CPC Class Codes: B29C 45/0408 involving at least a linear movement B29C45/0433 takes precedence
• CPC Class Codes: B29C 45/0441 involving a rotational movement B29C45/06 takes precedence
• CPC Class Codes: B29C 45/1615 The materials being injected at different moulding stations
• CPC Class Codes: B29C 45/34 having venting means
• CPC Class Codes: B29C 49/06 Injection blow-moulding
• CPC Class Codes: B29C 49/071 Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
• CPC Class Codes: B29K 2023/06 : PE, i.e. polyethylene
• CPC Class Codes: B29K 2023/065 : HDPE, i.e. high density polyethylene
• CPC Class Codes: B29K 2023/086 : EVOH, i.e. ethylene vinyl alcohol copolymer
• CPC Class Codes: B29K 2023/12 : PP, i.e. polypropylene
• CPC Class Codes: B29K 2067/00 : Use of polyesters or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2067/046 : PLA, i.e. polylactic acid or polylactide
• CPC Class Codes: B29K 2077/00 : Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29L 2031/712 : Containers; Packaging elements or accessories, Packages closures therefor B29L2031/56; ink or toner cartridges B29L2031/7678; squeeze tubes B29L2023/20; suitcases B29L2031/7418
• CPC Class Codes: B32B 1/00 : Layered products having a non-planar shape
• CPC Class Codes: B32B 2250/02 : 2 layers
• CPC Class Codes: B32B 2250/24 : All layers being polymeric
• CPC Class Codes: B32B 2250/244 : All polymers belonging to those covered by group B32B27/36
• CPC Class Codes: B32B 2439/00 : Containers; Receptacles closures therefor B32B2435/00
• CPC Class Codes: B32B 27/08 : of synthetic resin
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 3/266 : 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
• CPC Class Codes: B32B 7/027 : Thermal properties
• CPC Class Codes: B65D 23/02 : Linings or internal coatings
• CPC Class Codes: B65D 83/0055 : Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
• CPC Class Codes: Y10T 428/13 : Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/1352 : Polymer or resin containing [i.e., natural or synthetic]

Abstract

The invention is an integral two-layer preform (1) for the production of integrally blow-moulded bag-in-containers (2). The preform has an inner layer (11) and an outer layer (12), wherein the preform forms a two layer container upon blow-moulding, and wherein the thus obtained inner layer of the 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 than or equal to the melting temperature of the outer layer.

Claims

1. An integrally blow-moulded dispensing bag-in container consisting of:

(a) an outer container made of a single layer, said single layer comprising PET having a first melting temperature, said outer container comprising a body portion, and a neck region, and a mouth;

(b) a collapsible inner bag made of a single layer, said single layer comprising PET having a second melting temperature that is greater than or equal to the first melting temperature, said inner bag comprises a neck region and a body portion being fixed to the outer container at least at the neck;

(c) at least one vent fluidly connecting the region between the inner bag and the outer container, said vent open to the atmosphere;

(d) the outer container and said inner bag are releasably adhered to one another over substantially the entirety of the inner bag and outer container so as to readily delaminate at the body portion upon introduction of a pressurized gas through at least one vent between the inner bag and the outer container, so as to collapse the body portion of the inner bag and dispense a liquid contained therein.