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WO1995000325A1 - Preforme a couches multiples pour moulage par soufflage de plastique - Google Patents

Preforme a couches multiples pour moulage par soufflage de plastique Download PDF

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Publication number
WO1995000325A1
WO1995000325A1 PCT/US1994/004610 US9404610W WO9500325A1 WO 1995000325 A1 WO1995000325 A1 WO 1995000325A1 US 9404610 W US9404610 W US 9404610W WO 9500325 A1 WO9500325 A1 WO 9500325A1
Authority
WO
WIPO (PCT)
Prior art keywords
preform
layer
plastic
inner layer
thread
Prior art date
Application number
PCT/US1994/004610
Other languages
English (en)
Inventor
Richard C. Darr
William A. Slat
Original Assignee
Plastipak Packaging, Inc.
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 Plastipak Packaging, Inc. filed Critical Plastipak Packaging, Inc.
Priority to AU70920/94A priority Critical patent/AU7092094A/en
Publication of WO1995000325A1 publication Critical patent/WO1995000325A1/fr

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Classifications

    • 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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B29C45/1684—Injecting parison-like 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0723—Preforms or parisons characterised by their configuration having variable wall thickness at flange portion
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0732—Preforms or parisons characterised by their configuration having variable diameter at flange portion
    • 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
    • B29C2949/076—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
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • 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
    • B29C2949/076—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
    • B29C2949/0777—Tamper-evident band retaining ring
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3008—Preforms or parisons made of several components at neck portion
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3012—Preforms or parisons made of several components at flange portion
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components at body portion
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/302—Preforms or parisons made of several components at bottom portion
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • B29C2949/3028—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components having three or more components
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • B29C2949/3028—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components having three or more components
    • B29C2949/303—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components having three or more components having more than three components
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
    • B29C2949/3074—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating
    • B29C2949/3078—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating by spray coating
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
    • B29C2949/3074—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating
    • B29C2949/308—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating by dip coating
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B29K2995/0067—Permeability to gases non-permeable
    • 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
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate

Definitions

  • This invention relates to a multi-layer plastic preform for use in plastic blow molding.
  • Plastic blow molding is conventionally per ⁇ formed by providing a hot plastic parison either from extruded plastic or as a preform which is usually injection molded from plastic.
  • preforms are composed of a single type of plastic that is inject ⁇ ed into a mold through a single port.
  • U.S. Patent 4,307,137 to Ota et al. discloses a method for forming an optical design pattern in polyethylene terephthalate articles which are specifi ⁇ cally disclosed as a blow molding preform having inner and outer members with the inner member having an open end defining a thread closure and with the outer member having a junction with the inner member toward a closed end of the preform from the thread closure.
  • U.S. Patent 4,391,861 to Nilsson discloses a preform of a thermoplastic and has a two-part inter- fitted construction and at least one intermediate layer that functions as a gas barrier, and also discloses that the outer part may be previously used and reprocessed material.
  • U.S. Patent 4,646,925 to Nohara discloses a multi-layer preform for draw-blow forming a bottle which has inner and outer layers with a junction that is located toward a closed end of the preform from a closure thread at an open end of the preform.
  • the preform also includes a gas barrier intermediate the inner and outer layers.
  • An object of the present invention is to provide an improved multi-layer plastic preform for use in plastic blow molding.
  • the preform generally has a conventional shape including a tubular shape with a closed end and an open end.
  • the plastic preform includes an injection molded inner layer of virgin plastic having an outwardly extending annular flange at the open end of the preform.
  • An injection molded outer layer of post consumer recy ⁇ cled plastic covers the inner layer and has a thread for securing a closure, and the thread is located toward the closed end of the preform from the annular flange of the inner layer.
  • the construction of the multi-layer plastic preform allows increased use of post consumer recycled plastic by virtue of the outer layer defining the closure thread at the open end of the preform as well as defining a portion of the tubular shape and the other closed end.
  • the inner layer and the outer layer are each injection molded from polyethylene terephthalate.
  • the preferred construction of the preform also includes a thin intermediate layer of a gas barrier located between the inner and outer layers. Further- more, the intermediate layer that provides the gas barrier is most preferably ethylene-vinyl alcohol.
  • the multi-layer plastic preform has the outer layer at the open end of the preform provided with an annular axially extending flange that surrounds the annular flange of the inner layer and cooperates therewith to define a closure sealing surface of an annular shape.
  • FIGURE 1 is a sectional view taken through a multi-layer plastic preform constructed in accordance with the present invention
  • FIGURE la is an enlarged view of a portion of a wall of the preform showing an inner layer of virgin plastic, an intermediate layer of a gas barrier material and an outer layer of post consumer recycled plastic;
  • FIGURE 2 is a view illustrating mold apparatus utilized to manufacture the preform and shown during injection molding of the inner layer of virgin plastic;
  • FIGURE 3 is a view of the apparatus at a further state during application of the gas barrier intermediate layer in preparation for the injection molding of the outer layer;
  • FIGURE 4 is a view of the apparatus at a further stage during the injection molding of the outer layer of post consumer recycled plastic.
  • a multi-layer plastic preform for use in plastic blow molding is generally indicated by 10 and has a generally conventional shape including a closed end 12 and an open end 14.
  • This preform 10 is manufactured by different stages of injection blow molding by mold apparatus 16 shown in Figures 2, 3 and 4, which are hereinafter more fully described.
  • the multi-layer plastic preform 10 of this invention includes an inner layer 18 of virgin plastic having an outwardly extending annular flange 20 at the open end 14 of the preform.
  • the preform 10 also has a thin intermediate layer 22 composed of a gas barrier material that covers the exterior of the inner layer 18 from just below the annular flange 20 thereof to the closed end of the preform.
  • This intermediate layer is used when the preform is to be blow molded to a container for holding gas pressurized liquids, i.e. soft drinks.
  • the gas barrier intermediate layer may not be necessary.
  • An injection molded outer layer 24 of the preform 10 is composed of post consumer recycled plastic that covers the intermediate layer 22.
  • This outer layer 24 as in hereinafter more fully described is injection molded in situ over the inner layer 18 and has a thread 26 for securing a closure 28 by threading of a female thread thereof onto the exterior male thread of the preform.
  • the thread 26 of the outer layer 24 of the preform is located toward the closed end 12 of the preform from the annular flange 20 of the inner layer 18. This construction of the preform allows increased use of the post consumer recycled plastic as compared to prior constructions of multi-layer plastic preforms.
  • the inner layer 18 and the outer layer 24 are each injection molded from polyethylene terephthalate. Furthermore, when the gas barrier intermediate layer 22 is utilized, it is preferably composed of ethylene-vinyl alcohol.
  • the multi-layer plastic preform is preferably constructed with the outer layer 24 at the open end 14 of the preform having an annular axially extending flange 30 that surrounds the annular flange 20 of the inner layer 18 and cooperates therewith to define a closure sealing surface 32 of an annular shape.
  • the mold apparatus 16 is utilized to injec- tion mold the inner layer 18 as shown in Figure 2. More specifically, this apparatus 16 includes an inner core 34 on which each cycle of the injection molding is performed. More specifically, this core 34 is mounted on a support 36 and extends therefrom to a distal end 38 at which the closed end of the finally molded preform is located as is hereinafter more fully described.
  • a first cavity mold 40 of the apparatus includes a mold member 42 having a cavity 44 that receives the core 34.
  • a flange mold 46 of the apparatus has a pair of movable mold members 48 with a junction 50 in the closed posi ⁇ tion for defining a flange cavity 52.
  • Mold member 42 includes an injection port 54 through which hot plastic resin is injected to thus provide the inner layer 18 with the flange 20 as previously described. Relative movement between the cavity mold 40 and the other mold components then withdraws the inner layer 18 from the mold cavity 44. During this withdrawal, the flange 20 allows the flange mold 46 to maintain the inner layer 18 on the core 34 without slippage despite friction gener ⁇ ated with the mold cavity 44. Thereafter, the mold members 48 are moved away from each other so that the inner layer 18 is ready for further processing.
  • the molded inner layer 18 may then be processed by application of the intermediate layer 22 when the container to be blow molded from the preform 10 is to hold gas pressurized liquids.
  • This application can be performed by a suit ⁇ able coating device 56 that may dip, spray or brush, etc. the gas barrier intermediate layer 22 onto the exterior of the inner layer 18 from a location just below the flange 20 thereof to and covering the closed end of the inner layer.
  • the gas barrier intermediate layer prevents the escape of gas, e.g. C0 2 , to thereby prolong the product lifetime.
  • a second cavity mold 58 includes a mold member 60 having a cavity 62 for receiving the previously injection molded inner layer 18 with or without the intermediate layer 22 of the gas barrier.
  • the mold apparatus also includes a thread mold 64 having a pair of mold members 66 with a junction 68 in a closed position.
  • the mold members 66 are movable as shown in Figure 4 by arrows 70 in opposite directions so as to allow the molded inner layer 18 with the flange 20 thereof to be received within the cavity 62 of the mold 58.
  • the closed mold members 66 define a thread cavity 72 for molding the thread 26 of the outer layer 24.
  • Mold member 60 in ⁇ cludes an injection port 74 through which the post consumer recycled plastic is injected into the cavity 62 to injection mold the outer layer 24 with the thread 26 constructed as previously described. Thereafter, relative movement between the cavity mold 58 and the other mold components withdraws the molded preform from cavity 62. Further relative movement between the support 36 and the thread mold 64 then removes the preform 10 from the core 34. Finally, movement of the thread mold members 66 away from each other releases the molded preform 10.
  • the location of the preform flange 20 along the core 34 can be engaged with the support 36 which thus functions as a mold cavity defining surface during both stages of the injection molding.
  • the flange mold 46 and the thread mold 64 will then be thinner than the molds illustrated where there is a spacing along the core 34 between the preform flange 20 and mold support 36.
  • the outer layer of post consumer recycled plastic preferably constitutes at least 50% of the volume of the preform and, most preferably constitutes a greater percentage such as 70% to 90%.
  • the amount of recycled plastic that can be uti ⁇ lized, while still having a sufficiently thick inner layer 18 of virgin plastic to protect product held by a subsequently blow molded container, can be greater than is possible with conventional constructions due to the manner in which the thread 26 is constructed from the recycled plastic. While the best mode for carrying out the invention has been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the invention as defined by the following claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Des préformes plastiques à couches multiples (10) destinées à un moulage par soufflage comportent une couche interne moulée par injection (18) constituée de plastique vierge ayant une bride annulaire (20) s'étendant vers l'extérieur à une extrémité ouverte (14) de la préforme. Une couche externe moulée par injection (24) constituée de plastique recyclé au niveau du consommateur couvre la couche interne (18) et elle comporte un filetage (26) pour recevoir un capuchon. Ce filetage (26) part de la bride annulaire (20) de la couche interne (18) en direction de l'extrémité fermée (12) de la préforme. On réalise ainsi un récipient permettant une utilisation accrue de plastique recyclé. La préforme (10) peut être pourvue d'une couche intermédiaire (22) d'un matériau constituant une barrière auz gaz lorsque le récipient obtenu par moulage par soufflage est destiné à recevoir un liquide sous une pression de gaz, comme par exemple une boisson gazeuse.
PCT/US1994/004610 1993-06-18 1994-04-27 Preforme a couches multiples pour moulage par soufflage de plastique WO1995000325A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU70920/94A AU7092094A (en) 1993-06-18 1994-04-27 Multi-layer preform for plastic blow molding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7936893A 1993-06-18 1993-06-18
US08/079,368 1993-06-18

Publications (1)

Publication Number Publication Date
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997002939A1 (fr) * 1995-07-07 1997-01-30 Continental Pet Technologies, Inc. Moulage de manchons
WO1997043104A1 (fr) * 1996-05-16 1997-11-20 The Coca-Cola Company Procede de moulage par injection d'une preforme multicouche destinee au moulage par soufflage d'une bouteille en plastique
EP0907483A4 (fr) * 1996-05-24 2000-05-03 Plastipak Packaging Inc Recipient en plastique moule par soufflage et son procede de fabrication
DE19856356A1 (de) * 1998-12-07 2000-06-15 Karl Hehl Verfahren zur Herstellung von mehrstoffigen Vorformlingen
DE19907387A1 (de) * 1999-02-20 2000-08-31 Karl Hehl Aus mehreren Werkstoffen bestehender Kunststoffartikel sowie Verfahren zu dessen Herstellung
US6217818B1 (en) 1995-07-07 2001-04-17 Continental Pet Technologies, Inc. Method of making preform and container with crystallized neck finish
US6939591B2 (en) 1997-10-17 2005-09-06 Advanced Plastics Technologies, Ltd. Polyester laminate materials
US7303387B2 (en) 2004-06-10 2007-12-04 Advanced Plastics Technologies Luxembourg S.A. System for controlling mold temperatures
US7332204B2 (en) 1997-10-17 2008-02-19 Advanced Plastics Technologies Luxembourg S.A. Coated polyester preforms and articles
WO2008046419A1 (fr) * 2006-10-18 2008-04-24 Pbi-Dansensor A/S Dispositif destiné à être utilisé pour tester l'imperméabilité de contenants
US7367795B2 (en) 2002-11-08 2008-05-06 Advanced Plastics Technologies Luxembourg S.A. Injection mold having a wear resistant portion and a high heat transfer portion
WO2008125709A1 (fr) 2007-04-11 2008-10-23 Molmasa Aplicaciones Técnicas, S.L. Moule et procédé de fabrication de préformes bi-couche par surmoulage par injection et préforme bi-couche
US7531226B2 (en) 1999-04-21 2009-05-12 Advanced Plastics Technologies Luxembourg S.A. Multilayer containers and preforms having barrier properties utilizing recycled material
US7588808B2 (en) 2004-04-16 2009-09-15 Advanced Plastics Technologies Luxembourg S.A. Mono and multi-layer articles and injection molding methods of making the same
JP2021112890A (ja) * 2020-01-21 2021-08-05 大日本印刷株式会社 多層プリフォームの製造方法、多層容器の製造方法および多層プリフォーム

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US4646925A (en) * 1983-09-29 1987-03-03 Toyo Seikan Kaisha, Ltd. Multi-layer preform for draw-blow forming a bottle
US4808482A (en) * 1983-07-16 1989-02-28 Metal Box Public Limited Company Multi-layer plastics structures and apparatus and methods for their manufacture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808482A (en) * 1983-07-16 1989-02-28 Metal Box Public Limited Company Multi-layer plastics structures and apparatus and methods for their manufacture
US4646925A (en) * 1983-09-29 1987-03-03 Toyo Seikan Kaisha, Ltd. Multi-layer preform for draw-blow forming a bottle

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6787094B2 (en) 1995-07-07 2004-09-07 Continental Pet Technologies, Inc. Sleeve molding
US7615176B2 (en) 1995-07-07 2009-11-10 Graham Packaging Pet Technologies Inc. Sleeve molding
EP1477288A3 (fr) * 1995-07-07 2005-11-16 Graham Packaging PET Technologies Inc. Moulage de manchons
WO1997002939A1 (fr) * 1995-07-07 1997-01-30 Continental Pet Technologies, Inc. Moulage de manchons
US6217818B1 (en) 1995-07-07 2001-04-17 Continental Pet Technologies, Inc. Method of making preform and container with crystallized neck finish
EP1147872A3 (fr) * 1995-07-07 2002-03-20 Continental Pet Technologies, Inc. Procédé de moulage d'articles multicouches en matière plastique
US6428737B1 (en) 1995-07-07 2002-08-06 Continental Pet Technologies, Inc. Sleeve molding
US6572812B2 (en) 1995-07-07 2003-06-03 Continental Pet Technologies, Inc. Preform and container with crystallized neck finish and method of making the same
WO1997043104A1 (fr) * 1996-05-16 1997-11-20 The Coca-Cola Company Procede de moulage par injection d'une preforme multicouche destinee au moulage par soufflage d'une bouteille en plastique
US5851471A (en) * 1996-05-16 1998-12-22 The Coca-Cola Company Method for injection molding a multi-layer preform for use in blow molding a plastic bottle
US6051295A (en) * 1996-05-16 2000-04-18 The Coca-Cola Company Method for injection molding a multi-layer preform for use in blow molding a plastic bottle
EP0907483A4 (fr) * 1996-05-24 2000-05-03 Plastipak Packaging Inc Recipient en plastique moule par soufflage et son procede de fabrication
US6939591B2 (en) 1997-10-17 2005-09-06 Advanced Plastics Technologies, Ltd. Polyester laminate materials
US7261551B2 (en) 1997-10-17 2007-08-28 Advanced Plastics Technologies Luxembourg S.A. Preform molds incorporating high heat conductivity material
US7332204B2 (en) 1997-10-17 2008-02-19 Advanced Plastics Technologies Luxembourg S.A. Coated polyester preforms and articles
DE19856356A1 (de) * 1998-12-07 2000-06-15 Karl Hehl Verfahren zur Herstellung von mehrstoffigen Vorformlingen
DE19907387A1 (de) * 1999-02-20 2000-08-31 Karl Hehl Aus mehreren Werkstoffen bestehender Kunststoffartikel sowie Verfahren zu dessen Herstellung
US7531226B2 (en) 1999-04-21 2009-05-12 Advanced Plastics Technologies Luxembourg S.A. Multilayer containers and preforms having barrier properties utilizing recycled material
US7367795B2 (en) 2002-11-08 2008-05-06 Advanced Plastics Technologies Luxembourg S.A. Injection mold having a wear resistant portion and a high heat transfer portion
US7588808B2 (en) 2004-04-16 2009-09-15 Advanced Plastics Technologies Luxembourg S.A. Mono and multi-layer articles and injection molding methods of making the same
US7578668B2 (en) 2004-06-10 2009-08-25 Advanced Plastics Technologies Luxembourg S.A. Mold assembly having a pressure reducing device
US7303387B2 (en) 2004-06-10 2007-12-04 Advanced Plastics Technologies Luxembourg S.A. System for controlling mold temperatures
WO2008046419A1 (fr) * 2006-10-18 2008-04-24 Pbi-Dansensor A/S Dispositif destiné à être utilisé pour tester l'imperméabilité de contenants
WO2008125709A1 (fr) 2007-04-11 2008-10-23 Molmasa Aplicaciones Técnicas, S.L. Moule et procédé de fabrication de préformes bi-couche par surmoulage par injection et préforme bi-couche
US8551592B2 (en) 2007-04-11 2013-10-08 Molmasa Aplicaciones Tecnicas, S.L. Two-layered preform obtained by injection overmolding
JP2021112890A (ja) * 2020-01-21 2021-08-05 大日本印刷株式会社 多層プリフォームの製造方法、多層容器の製造方法および多層プリフォーム
JP7406721B2 (ja) 2020-01-21 2023-12-28 大日本印刷株式会社 多層プリフォームの製造方法、多層容器の製造方法および多層プリフォーム

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