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WO2004043694A1 - Lamine d'emballage en plastique transparent a effet de barriere contre les gaz - Google Patents

Lamine d'emballage en plastique transparent a effet de barriere contre les gaz Download PDF

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Publication number
WO2004043694A1
WO2004043694A1 PCT/SE2003/001750 SE0301750W WO2004043694A1 WO 2004043694 A1 WO2004043694 A1 WO 2004043694A1 SE 0301750 W SE0301750 W SE 0301750W WO 2004043694 A1 WO2004043694 A1 WO 2004043694A1
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WO
WIPO (PCT)
Prior art keywords
layer
gas barrier
polymer
packaging laminate
thickness
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.)
Ceased
Application number
PCT/SE2003/001750
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English (en)
Inventor
Sven Andrén
Torsten Olofsson
Monika BÜRKI
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance 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
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to AU2003276805A priority Critical patent/AU2003276805A1/en
Publication of WO2004043694A1 publication Critical patent/WO2004043694A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B7/022—Mechanical properties
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/043—HDPE, i.e. high density polyethylene
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • 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
    • B32B2377/00—Polyamides
    • 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
    • B32B2439/70—Food packaging
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

Definitions

  • the present invention relates to a transparent gas barrier packaging laminate having a required bending stiffness, comprising outside layers of heat- sealable olefin polymer, a first gas barrier layer of SiOx, coated onto a first polymer carrier layer and a second gas barrier layer of SiOx, coated onto a second polymer carrier layer.
  • the invention also relates to a method of manufacturing the packaging laminate and to packaging containers produced from the packaging laminate.
  • packages for beverage and liquid food of the type that are single-use disposable plastic pouches, preferably at least partly, at some portion of the package, transparent to display the contents to the consumer when exposed on the shelf, e.g. in the food store.
  • Most commonly such packages are provided with a straw for direct drinking or a pull-tab for opening and pouring of the contents.
  • Such packages do not have the advantage of having the dimension and grip stability of the more common paperboard packaging laminate drink packages of the Tetra Brik® - type.
  • they have the image of a more positive environmental profile in many countries, with the argument that the amount of used packaging material as well as the volume of the emptied package is very small and because it may be recyclable with other similar flexible plastic items.
  • the traditional Tetra Brik-type packages have an oxygen barrier layer of aluminium foil, which in some countries is less desirable and which also makes a transparent package impossible.
  • a web of the packaging laminate is continuously formed into a tube, filled with contents and sealed off to pillow- shaped packaging containers by a simultaneous heat sealing and cutting operation.
  • the pillow-shaped packaging container is then normally foldformed into a parallellepipedic packaging container.
  • the main advantage of this continuous tube-forming, filling and sealing packaging process concept is that the web may be sterilised continuously just before tube-forming, thus providing for the possibility of an aseptic packaging process, i.e.
  • the invention is also directed to a packaging container filled with beverage or liquid food produced from the packaging laminate of the invention as well as to a method of manufacturing of the laminated packaging material of the invention.
  • the solution to the above mentioned problem and need is thus to provide a thin, transparent packaging laminate with good gas barrier properties by means of laminating the two polymer carrier layer films, coated with the SiOx gas barrier layers, into an I-beam or sandwich arrangement with an intermediate, in comparison to the other, surrounding laminate layers, relatively thick, distancing layer of a high stiffness polyolefin, the laminate further having outer heat sealable layers of thermoplastic polymer.
  • the polymer carrier layers comprise polyester or polyamide materials and therefore have a certain degree of inherent stiffness, however, other relatively stiff polymers may also be employed for the carrier layers according to the invention. More preferably, they are oriented films and thus have a higher degree of crystallinity than non-oriented polymer films.
  • the olefin polymer of the intermediate layer also contributes with a certain degree of stiffness by itself to the packaging laminate as a whole.
  • the so-called I-beam or sandwich arrangement of two relatively stiff carrier layers laminated to each side of a thicker and relatively stiff intermediate polymer layer provides for a laminate having surprisingly good bending stiffness in relation to its thickness.
  • the arrangement of the two PECVD-deposited SiOx-layers has proved to result in a much more than two-fold increased gas barrier, compared to a laminate or film containing merely one SiOx-layer.
  • the arrangement of a thicker intermediate layer also acting as a "buffer" for penetration of gas, in particular oxygen gas provides for surprisingly improved gas barrier properties, which prove a synergistic effect resulting from this particular arrangement.
  • the laminate has excellent gas barrier properties and is both economical and easy to handle in a high speed, continuous packaging process.
  • the thickness of the intermediate layer does not constitute more than from about 30 to about 55 % of the total thickness of the packaging laminate, more preferably from about 35 to about 50 %.
  • the required bending stiffness of the resulting packaging laminate does not result from the mere thickness of the intermediate layer, but that there is some kind of interaction between the layers in the laminate, which we know as the so called I- beam or sandwich effect.
  • the thickness of one carrier layer constitutes from about 5 to about 20, more preferably from about 5 to about 15 % of the total packaging laminate, which shows that also the carrier layers do not contribute to the total bending stiffness of the packaging laminate by their mere thickness, but instead that they do need to contribute by their inherent stiffness properties and their interaction with the thicker intermediate layer.
  • the carrier layer of oriented polymer is a p reman ufactu red film of polyester or polyamide, such as a cast film or preferably a mono- or biaxially oriented polyethyleneterephtalate (PET), polyethylenenaphtenate (PEN) or polyamide (PA).
  • PET polyethyleneterephtalate
  • PEN polyethylenenaphtenate
  • PA polyamide
  • the polymer of the intermediate layer is a polyolefin having higher stiffness properties, relative to for example low density polyethylene
  • LDPE low density polyethylene
  • PP polypropylene
  • the polymer of the intermediate layer is an define polymer with higher stiffness than LDPE and the polymer of the carrier layer is an oriented polyester or polyamide.
  • the gas barrier layers of SiOx are positioned in the laminate such that they are facing each other, with the intermediate polymer layer between them. In this way, optimal gas barrier layers may be obtained and the layers of SiOx will be protected in the best way.
  • the SiOx layers are facing outwards in the laminate structure are conceivable.
  • inorganic layers such as SiOx
  • the SiOx gas barrier layers are applied by means of the continuous method of plasma enhanced chemical vapour deposition, PECVD, of SiOx from a plasma of an organic silicon compound, such as hexadimethylsiloxane (HDMSO).
  • the thickness of the carrier polymer layer is from about 7 to about 30 ⁇ m, more preferably from about 8 to about 20, most preferably from about 8 to about 15 ⁇ m, and according to a preferred embodiment, the two carrier polymer films have about the same or exactly the same thickness.
  • the PECVD process works optimally with the above thickness of the carrier layer, which is also preferred from the economical point of view.
  • carrier layers i.e. the outer layers of the I-beam arrangement, that have about the same or exactly the same thickness, although it may be possible for certain desired properties to use carrier layers of different thickness or bending stiffness.
  • the thickness of the intermediate layer is from about 40 to about 80 ⁇ m, more preferably from about 40 to about 60 ⁇ m, most preferably from about 40 to about 55 ⁇ m and preferably, while the total thickness of the packaging laminate is from about 100 to about 180 ⁇ m, most preferably from about 110 to about 140 ⁇ m.
  • the thickness of the intermediate layer should be from about 40 to about 60 ⁇ m, when the intermediate layer comprises a polymer such as for example HDPE or PP.
  • the intermediate layer comprises a polymer such as for example HDPE or PP.
  • the thickness of the intermediate layer (15) is from 40 to 60 ⁇ m
  • the thickness of the polymer carrier layer (11 ,12) is from 8 to 15 ⁇ m
  • the thickness of the outside layers of heat-sealable olefin polymer (16,17) is from 10 to 25 ⁇ m and from 18 to 30 ⁇ m, respectively
  • the total thickness of the packaging laminate is from 110-140 ⁇ m.
  • the thickness of the intermediate layer (15) is from 40 to 50 ⁇ m
  • the thickness of the polymer carrier layer (11 , 12) is from 12 to 15 ⁇ m
  • the thickness of the outside layers of heat-sealable olefin polymer (16,17) is from 10 to 25 ⁇ m and from 18 to 30 ⁇ m, respectively
  • the total thickness of the packaging laminate is from 110-140 ⁇ m.
  • the thickness of the intermediate layer (15) is from 50 to 60 ⁇ m
  • the thickness of the polymer carrier layer (11 ,12) is from 8 to 12 ⁇ m
  • the thickness of the outside layers of heat-sealable olefin polymer (16,17) is from 10 to 25 ⁇ m and from 18-30 ⁇ m, respectively
  • the total thickness of the packaging laminate is from 110-140 ⁇ m.
  • the ratio between the thickness of the intermediate layer and the carrier layer is from 2 to 7 and the ratio of the total thickness of the packaging laminate to the thickness of the intermediate layer is from 2 to 3 when the total thickness is from 110 to 140 ⁇ m, or, the ratio between the thickness of the intermediate layer and the carrier layer is from 4 to 10 and the ratio of the total thickness of the packaging laminate to the thickness of the intermediate layer is from 1 ,7 to 3 when the total thickness is from 140 to 180 ⁇ m.
  • a packaging container filled with beverage or liquid food preferably an aseptic packaging container, produced at least partly from the packaging laminate of the invention. This aspect is specified in claim 19.
  • the packaging container according to the invention is a pouch or "stand-up pouch” or similar and is durable at handling and distribution and resistant to moisture and oxygen gas during long term storage, due to the high quality packaging laminate, which in turn also provides for high seal quality and excellent gas barrier properties.
  • a further important advantage of packaging containers produced from the packaging laminate according to the invention is that they are durable to microwave cooking or thawing, as well as retorting.
  • a method of manufacturing of the laminated packaging material of the invention is covered by the method as set out in any of claims 20-24.
  • Figure 1 is a cross-sectional view of a preferred laminated packaging material according to the present invention
  • Figure 2 shows a preferred example of a packaging container produced from the packaging laminate according to the invention and Figures 3a, 3b, and 3c show alternative preferred embodiments of methods of manufacturing of the packaging laminate.
  • Figure 1 thus shows a transparent packaging laminate 10, comprising a first and second carrier layer 11 ;12 being a film of a preferably oriented polyester, such as for example polyethyleneterephtalate (PET), or a film of a preferably oriented polyamide (PA), onto which are coated thin gas barrier layers of SiOx 13;14 by means of plasma enhanced chemical vapour deposition (PECVD).
  • the two SiOx layers are preferably directed towards the interior of the laminate, thus facing each other.
  • an intermediate layer 15 of a relatively stiff olefin polymer such as for example high density polyethylene (HDPE) or polypropylene (PP).
  • HDPE high density polyethylene
  • PP polypropylene
  • the intermediate layer is thicker than any of the surrounding layers in the packaging laminate, and provides as such a distancing element between the two carrier layer films of oriented polymer.
  • the preferred oriented polymer films have a certain degree of inherent stiffness in that they are oriented and thus may have a relatively higher degree of crystallininty than non-oriented polymer films.
  • the olefin polymer of the intermediate layer also contributes with a certain degree of stiffness by itself to the packaging laminate as a whole.
  • the so-called I-beam or sandwich arrangement of two relatively stiff carrier layers laminated on each side of a thicker and relatively stiff intermediate polymer layer provides for a laminate having surprisingly good bending stiffness in relation to its thickness.
  • the arrangement of the two PECVD-deposited SiOx-layers has proved to result in a much more than two-fold increased gas barrier, compared to a laminate or film containing merely one SiOx-layer.
  • the arrangement of an intermediate layer also acting as a "buffer" for penetration of gas, in particular oxygen gas provides for surprisingly improved gas barrier properties, which indicates a synergistic effect resulting from this particular arrangement.
  • a heat-sealable olefin polymer preferably a low density polyethylene (LDPE) or a linear low density polyethylene (LLDPE), which include also so-called metallocene-catalysed LLDPE's (m-LLDPE), i.e. LLDPE polymers catalysed by means of a single site catalyst.
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • m-LLDPE metallocene-catalysed LLDPE's
  • LLDPE polymers catalysed by means of a single site catalyst.
  • MDPE medium high density polyethylene
  • PP polypropylene
  • At least one layer 17 of a heat-sealable olefin polymer preferably a layer of LDPE, more preferably a layer of LLDPE and most preferably a first part-layer 17a of LDPE and a second outermost part-layer 17b of LLDPE.
  • the outside layers 16, 17 are applied each in a quantity of from about 10 to about 30 ⁇ m, for optimal heat sealability properties in relation to cost efficiency.
  • binder layers of adhesive polymers, tie layers and primers known in the art.
  • Such binder layers and primers are adapted to the specific choices of polymer in the various layers and may be selected from polyolefins and modified polyolefins, preferably polyethylene-based polymers, such as for example LDPE and modified LDPE.
  • a polyethylene base polymer graft modified by an unsaturated alkoxysilane compound such as described in US Patent No. 5,731 ,092, herein incorporated by reference. See expecially column 1 , line 39 to column 3, line 21 and Examples 1 and 2.
  • binder layers are LPDE homo- or copolymers or graft copolymers of polyethylene, grafted with monomers comprising carboxylic or glycidyl functional groups, such as acrylic monomers or maleic anhydride (MAH) monomers, for example ethylene (meth)acrylic acid copolymer (E(M)AA), ethylene-glycidyl(meth)acrylate copolymer (EG(M)A)) or MAH-grafted polyethylene (MAH-g-PE).
  • E(M)AA ethylene (meth)acrylic acid copolymer
  • EG(M)A) ethylene-glycidyl(meth)acrylate copolymer
  • MAH-g-PE MAH-grafted polyethylene
  • FIG. 2 shows a preferred example of a packaging container 20 produced from the packaging laminate 10 according to the invention.
  • the packaging container is particularly suitable for small beverage packages for direct use by means of a drinking straw or the like.
  • such a package has a volume of about 330 ml or less, preferably from about 100 to about 250 ml, for example about 125 ml, 200 ml or about 250 ml.
  • It may be a pouch of any configuration, but is preferably shaped as a wedge 21 , such that it is easy to handle and dimensionally stable when put on a shelf in the food store or on a table or the like.
  • the bottom part 22 of the package is fold formed such that the transversal heat seal 24 of the bottom is hidden under the triangular corner flaps 23, which are folded and sealed against the bottom of the package.
  • Figure 3a shows a preferred embodiment 30a of a method of producing the packaging laminate 10 according to the invention.
  • a first web 331 of a polymer carrier layer 332 coated with a SiOx gas barrier layer 333, and a second web 334 of a polymer carrier layer 335 coated with a SiOx gas barrier layer 336, are advanced towards an extrusion station 337, the two SiOx layers 333 and 336 preferably facing each other, and laminated to each other by means of extruding an intermediate polymer layer 338 between them and pressing the two webs 331 ,334 and the intermediate layer 338 together when passing a roller nip after the extrusion station 337.
  • the intermediate polymer layer 338 may be coextruded together with adjacent layers of binder polymer 339 for improved bonding to the SiOx-layers on the two webs 331 and 334.
  • the resulting laminated web 340 is advanced to an extrusion station 341 , where an outside layer of a heat-sealable polyolefin 342 is extruded onto the outside of the polymer carrier layer 335.
  • the thus resulting web 343 is further advanced to an extrusion station 344, where an outside layer of a heat-sealable polyolefin 345 is extruded onto the outside of the polymer carrier layer 332.
  • the resulting packaging laminate 346 will then be wound up and stored onto a reel, not shown.
  • Figure 3b shows another preferred embodiment 30b of a method of producing the packaging laminate 10 according to the invention.
  • a first web 331 of a polymer carrier layer 332 coated with a SiOx gas barrier layer 333, and a second web 334 of a polymer carrier layer 335 coated with a SiOx gas barrier layer 336, are advanced towards an extrusion station 337, the two SiOx layers 333 and 336 preferably facing each other, and laminated to each other by means of extruding an intermediate polymer layer 338 between them and pressing the two webs 331 ,334 and the intermediate layer 338 together when passing a roller nip after the extrusion station 337.
  • the intermediate polymer layer 338 may be coextruded together with adjacent layers of binder polymer 339 for improved bonding to the SiOx layers on the two webs 331 and 334.
  • the resulting laminated web 340 is advanced to a hot roller nip 341 ', where an outside layer of a pre-manufactured film comprising at least one layer of a heat-sealable polyolefin 342' is laminated to the outside of the polymer carrier layer 335, by means of application of heat and pressure in the hot roller nip 341'.
  • the thus resulting web 343' is further advanced to a hot roller nip 344', where an outside layer of a pre-manufactured film comprising at least one layer of a heat- sealable polyolefin 345' is laminated to the outside of the polymer carrier layer 332, by application of heat and pressure in the hot roller nip 344'.
  • Figure 3c shows a further preferred embodiment 30c of a method of producing the packaging laminate 10 according to the invention.
  • a first web 331 of a polymer carrier layer 332 coated with a SiOx gas barrier layer 333, and a second web 334 of a polymer carrier layer 335 coated with a SiOx gas barrier layer 336, are advanced towards a hot roller nip 337', the two SiOx layers 333 and 336 preferably facing each other, at the same time as a web of a pre-manufactured film of an intermediate polymer layer 338' is advanced between the two webs 331 , 334 towards the nip 337'.
  • the three webs are laminated to each other by application of heat and pressure when passing the hot roller nip 337'.
  • the intermediate polymer layer 338' may be a premanufacured film having outer layers of binder polymer 339' for improved bonding to the SiOx- layers on the webs 331 ,334.
  • the resulting laminated web 340' is advanced to a hot roller nip 341', where an outside layer of a pre-manufactured film comprising at least one layer of a heat-sealable polyolefin 342' is laminated to the outside of the polymer carrier layer 335, by means of application of heat and pressure in the hot roller nip 341'.
  • the thus resulting web 343" is further advanced to a hot roller nip 344', where an outside layer of a pre-manufactured film comprising at least one layer of a heat-sealable polyolefin 345' is laminated to the outside of the polymer carrier layer 332, by application of heat and pressure in the hot roller nip 344'.
  • the resulting packaging laminate 346" will then be wound up and stored onto a reel, not shown.
  • the extrusion stations 341 and 344 may be passed in the opposite order according to an alternative preferred embodiment.
  • the lamination of the outside heat-sealable polyolefin films may be carried out in the opposite order, i.e. by first laminating the premanufactured film 345' to the outer side of the polymer carrier layer 332, in the hot roller nip 344', thus resulting in a web 347.
  • the web 347 is further advanced to a hot roller nip 341 ', in which the outside heat-sealable pre- manufactured film 342' is then laminated to the outer side of the polymer carrier layer 335, thus resulting in the packaging laminate 346' or 346".
  • the surface of the SiOx gas barrier layer 333, 336 is treated by a surface oxidation treatment such as corona treatment, in order to provide improved adhesion to the intermediate polymer layer 338; 338' or the binder layers 339; 339'.
  • a surface oxidation treatment such as corona treatment
  • the various pre-manufactured webs 331 , 334, 338', 342' and 345' are laminated to each other by means of primer lamination, i.e. by means of coating and drying a primer or anchoring agent onto one of the webs and then laminating through a roller nip.
  • the packaging laminate 10 may be provided with a printed decor layer in order to render the packaging container more attractive and informative to consumers and to protect its contents against light, which printed decor may be applied onto the SiOx layer 333 or 336, which is directed towards the outside of a package formed from the packaging laminate. Alternatively it may be applied onto the other side of the carrier layer 332 or onto the outside layer of heat-sealable polyolefin 342, 345; 342', 345'. In the latter case, the printed outside should preferably be covered by a thin, transparent protective polymer layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

La présente invention se rapporte à un laminé d'emballage transparent à effet de barrière contre les gaz (10) ayant une souplesse requise, qui comporte des couches externes d'une polyoléfine thermoscellable (16, 17), deux couches de support polymères (11, 12) recouvertes chacune d'une couche à effet de barrière contre les gaz de SiOx (13, 14), les deux couches de support polymères avec les couches de SiOx étant laminées l'une à l'autre au moyen d'une couche polymère intermédiaire (15), qui est, en comparaison, relativement plus raide et plus épaisse que les autres couches avoisinantes. La raideur requise du laminé d'emballage est le résultat de l'interaction de la section en I entre les deux couches de support et la couche polymère d'espacement intermédiaire. De préférence, l'épaisseur de la couche polymère intermédiaire (15) représente environ 30 % à environ 55 % de l'épaisseur totale du laminé d'emballage (10). L'invention se rapporte également à un contenant d'emballage du type sachet ou analogue fabriqué à partir du laminé d'emballage, ainsi qu'à un procédé de fabrication de ce laminé d'emballage.
PCT/SE2003/001750 2002-11-13 2003-11-12 Lamine d'emballage en plastique transparent a effet de barriere contre les gaz Ceased WO2004043694A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003276805A AU2003276805A1 (en) 2002-11-13 2003-11-12 Transparent plastic gas barrier packaging laminate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0203350A SE526512C2 (sv) 2002-11-13 2002-11-13 Transparant förpackningslaminat i plast och med gasbarriär
SE0203350-4 2002-11-13

Publications (1)

Publication Number Publication Date
WO2004043694A1 true WO2004043694A1 (fr) 2004-05-27

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PCT/SE2003/001750 Ceased WO2004043694A1 (fr) 2002-11-13 2003-11-12 Lamine d'emballage en plastique transparent a effet de barriere contre les gaz

Country Status (3)

Country Link
AU (1) AU2003276805A1 (fr)
SE (1) SE526512C2 (fr)
WO (1) WO2004043694A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005120826A1 (fr) * 2004-06-14 2005-12-22 Tetra Laval Holdings & Finance S.A. Récipient d'emballage, laminé d'emballage utilisation d'une impression en couleur
EP1648781A4 (fr) * 2003-07-18 2010-10-27 Tetra Laval Holdings & Finance Stratifie plastique pour emballage barriere aux gaz
WO2014105404A1 (fr) * 2012-12-28 2014-07-03 Dow Global Technologies Llc Films à plusieurs couches contenant des compositions polymères fonctionnelles à base d'éthylène
GB2625383A (en) * 2022-12-16 2024-06-19 Camvac International Ltd Multi-layer barrier film

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385054A1 (fr) * 1989-01-11 1990-09-05 Tetra Laval Holdings & Finance SA Matériau d'emballage stratifié formant barrière au gaz et à l'arôme et procédé pour sa fabrication
EP0606002A2 (fr) * 1992-12-22 1994-07-13 Kabushiki Kaisha Hosokawa Yoko Film multicouche et procédé pour sa production
JPH07187205A (ja) * 1993-12-27 1995-07-25 Kao Corp 倒立ラミネートチューブ容器
US5508075A (en) * 1993-06-03 1996-04-16 Tetra Pak (Suisse) Sa Packaging laminate with gas and aroma barrier properties
JPH08239491A (ja) * 1995-03-01 1996-09-17 Teijin Ltd 透明ガスバリアーフイルム用ポリエステルフイルム
SE507094C2 (sv) * 1996-07-09 1998-03-30 Tetra Laval Holdings & Finance Förpackningsbehållare avsedd för kyllagring av flytande livsmedel i is eller vatten
WO2000030846A1 (fr) * 1998-11-26 2000-06-02 Tetra Laval Holdings & Finance S.A. Structure multicouche d'emballage et contenants d'emballage ainsi fabriques, et procede de fabrication de cette structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385054A1 (fr) * 1989-01-11 1990-09-05 Tetra Laval Holdings & Finance SA Matériau d'emballage stratifié formant barrière au gaz et à l'arôme et procédé pour sa fabrication
EP0606002A2 (fr) * 1992-12-22 1994-07-13 Kabushiki Kaisha Hosokawa Yoko Film multicouche et procédé pour sa production
US5508075A (en) * 1993-06-03 1996-04-16 Tetra Pak (Suisse) Sa Packaging laminate with gas and aroma barrier properties
JPH07187205A (ja) * 1993-12-27 1995-07-25 Kao Corp 倒立ラミネートチューブ容器
JPH08239491A (ja) * 1995-03-01 1996-09-17 Teijin Ltd 透明ガスバリアーフイルム用ポリエステルフイルム
SE507094C2 (sv) * 1996-07-09 1998-03-30 Tetra Laval Holdings & Finance Förpackningsbehållare avsedd för kyllagring av flytande livsmedel i is eller vatten
WO2000030846A1 (fr) * 1998-11-26 2000-06-02 Tetra Laval Holdings & Finance S.A. Structure multicouche d'emballage et contenants d'emballage ainsi fabriques, et procede de fabrication de cette structure

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* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199538, Derwent World Patents Index; Class A92, AN 1995-289676 *
DATABASE WPI Week 199647, Derwent World Patents Index; AN 1996-472308 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1648781A4 (fr) * 2003-07-18 2010-10-27 Tetra Laval Holdings & Finance Stratifie plastique pour emballage barriere aux gaz
WO2005120826A1 (fr) * 2004-06-14 2005-12-22 Tetra Laval Holdings & Finance S.A. Récipient d'emballage, laminé d'emballage utilisation d'une impression en couleur
WO2014105404A1 (fr) * 2012-12-28 2014-07-03 Dow Global Technologies Llc Films à plusieurs couches contenant des compositions polymères fonctionnelles à base d'éthylène
GB2625383A (en) * 2022-12-16 2024-06-19 Camvac International Ltd Multi-layer barrier film
GB2625383B (en) * 2022-12-16 2025-04-16 Camvac International Ltd Multi-layer barrier film

Also Published As

Publication number Publication date
SE526512C2 (sv) 2005-09-27
SE0203350D0 (sv) 2002-11-13
SE0203350L (sv) 2004-05-14
AU2003276805A1 (en) 2004-06-03

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