GB2210826A - Microwave transparent barrier packaging materials - Google Patents
Microwave transparent barrier packaging materials Download PDFInfo
- Publication number
- GB2210826A GB2210826A GB8724451A GB8724451A GB2210826A GB 2210826 A GB2210826 A GB 2210826A GB 8724451 A GB8724451 A GB 8724451A GB 8724451 A GB8724451 A GB 8724451A GB 2210826 A GB2210826 A GB 2210826A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxide
- film
- coated
- coating
- laminate
- 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.)
- Granted
Links
- 230000004888 barrier function Effects 0.000 title claims description 34
- 239000005022 packaging material Substances 0.000 title claims description 6
- 238000000576 coating method Methods 0.000 claims abstract description 75
- 239000011248 coating agent Substances 0.000 claims abstract description 72
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000001301 oxygen Substances 0.000 claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 8
- 239000002985 plastic film Substances 0.000 claims abstract description 8
- 229920006255 plastic film Polymers 0.000 claims abstract description 8
- 239000006223 plastic coating Substances 0.000 claims abstract description 5
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 26
- 229920001223 polyethylene glycol Polymers 0.000 claims description 26
- 239000002131 composite material Substances 0.000 claims description 25
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims description 25
- 230000035699 permeability Effects 0.000 claims description 24
- 239000000853 adhesive Substances 0.000 claims description 22
- 230000001070 adhesive effect Effects 0.000 claims description 22
- 229920000728 polyester Polymers 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 238000009470 controlled atmosphere packaging Methods 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 238000009736 wetting Methods 0.000 claims description 5
- 229920002292 Nylon 6 Polymers 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 89
- 239000004698 Polyethylene Substances 0.000 description 44
- 229920000573 polyethylene Polymers 0.000 description 44
- -1 Polyethylene Polymers 0.000 description 43
- 230000008020 evaporation Effects 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000003475 lamination Methods 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000000151 deposition Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000004922 lacquer Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000005030 aluminium foil Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000003466 anti-cipated effect Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000005566 electron beam evaporation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000009459 flexible packaging Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 238000003855 Adhesive Lamination Methods 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229920000134 Metallised film Polymers 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 235000015173 baked goods and baking mixes Nutrition 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000011850 desserts Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 238000007757 hot melt coating Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000002651 laminated plastic film Substances 0.000 description 1
- 235000013622 meat product Nutrition 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011104 metalized film Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000009448 modified atmosphere packaging Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000005026 oriented polypropylene Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000005546 reactive sputtering Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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
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- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular 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
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- B32B27/00—Layered products comprising a layer of synthetic resin
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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
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- B32B3/06—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 features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
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- 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
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- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/4279—Joints, seams, leakproof joints or corners, special connections between panels
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-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/081—Oxides of aluminium, magnesium or beryllium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/10—Glass or silica
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- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
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- B32B2307/7244—Oxygen barrier
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- B65D2581/3463—Means for applying microwave reactive material to the package
- B65D2581/3466—Microwave reactive material applied by vacuum, sputter or vapor deposition
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- B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
- B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
- B65D2581/3471—Microwave reactive substances present in the packaging material
- B65D2581/3472—Aluminium or compounds thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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- B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
- B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
- B65D2581/3471—Microwave reactive substances present in the packaging material
- B65D2581/3481—Silicon or oxides thereof
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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
- B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
- B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
- B65D2581/3486—Dielectric characteristics of microwave reactive packaging
- B65D2581/3494—Microwave susceptor
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
Plastics films or laminates especially suitable for use in packaging oxygen-sensitive liquid foodstuffs for microwave heating, comprise a plastic film with a metallic or non-metallic oxide coating on one surface. Laminates may comprise two or more such films joined with oxide faces adjacent. Films may have a thin plastic coating over the oxide, the coating itself also bearing a coating of the oxide. A coating of a metallic or non-metallic oxide on a plastics film may be formed by evaporating a metal or non-metal in vacuo, reacting it with oxygen or an oxygen containing gas or vapour and condensing the product on the film.
Description
Microwave transparent barrier packaginG materials
This invention relates to web materials with good barrier to oxygen and/or water vapour which are substantially transparent to microwave radiation and are especially, but not exclusively, useful for the construction of cartons for oxygen sensitive liquid foodstuffs which require to be heated in microwave ovens.
It is well known to package liquid or semi-solid foodstuffs sensitive to oxidative degradation in cartons fabricated from composites of thin cardboard, polyolefines and aluminium foil. Typical examples are the cartons sold under the trade names "Tetrapak" or "Combibloc". A typical construction of the composite used to produce such a carton is: a) Polyethylene layer for surface protection or heat seal.
b) Board to provide rigidity.
c) Polyethylene bonding layer.
d) Aluminium foil to provide barrier.
e) Polyethylene heat sealable layer.
Although widely used for packaging of liquids like fruit juice or milk and semi solids like soups, meat products and desserts, such cartons have the disadvantage that they cannot be heated in a microwave oven because the aluminium foil web, which is essential for barrier to ingress of oxygen during storage, is not transparent to microwave radiation. Therefore, if it is required to microwave cook the product, it must be transferred to another microwave transparent container, which is inconvenient.
It is also well known to coat a plastic film, such as a film of poly (ethylene glycol) terephthalate, with a thin layer of metal such as aluminium, by vapour deposition in vacuo in order to achieve a good barrier of oxygen and water vapour, but such metallised films are also nontransparent to microwaves. US patent 3442686 describes coating of films of poly (ethylene glycol) terephthalate or polyolefines such as polyethylene or polypropylene with oxides of silicon or aluminium by vapour deposition in vacuo. Such oxides are transparent to microwaves, but the barrier of these materials, although enhanced significantly by the oxide coating, is still insufficient to allow their use in barrier cartons requiring long shelf life.
We have now found that, by taking a plastic film A and coating it with an oxide B using either existing techniques or the technique of reactive evaporation (C) described herein, and then either: 1) laminating the oxide coated film to another oxide coated
film (with the oxide coated surfaces adjacent), or 2) coating the oxide coated surface with a thin layer of an
organic coating E and then recoating with oxide,
It is possible to produce materials which both have excellent barrier properties (better than would be expected from known technology) and are substantially transparent to microwave radiation. These materials can be incorporated into laminates with board and polyethylene, and converted to cartons using known fabrication techniques.
Film A can be any suitable web substrate which is substantially transparent to microwaves and which can be coated with oxide, and can include polyester, polypropylene, polyethylene, polyamide, regenerated cullulose, polystyrene, polyacrylonitrile, polyvinyl chloride, polyvinylidene chloride, polysulphone or certain papers or boards including any composites or coextrusions of the above materials, or variants coated with other plastics. In one embodiment of the invention, poly (ethylene glycol) terephthalate or nylon 6 films are preferred, since when oxide coated and laminated or recoated as described in (1) or (2) above they give exceptionally low oxygen permeability ( < 0.2 cc/metre2/ 24 hours), comparable to the barrier of aluminium foil.
This product can then be laminated or extrusion coated with polyethylene to form the composite for the carton. In another embodiment of the invention, polyethylene is preferred, since when oxide coated and laminated or recoated as described above it gives an adequate oxygen permeability (typically 0.5 cc/metre2/24 hours) and is also of low cost and can be used to substitute both the aluminium and the polyethylene plies in the composite described above.
Oxide B can be any metal or non-metal oxide with good barrier to oxygen and adequate adhesion to the film A. The oxides of silicon (SiO2) and aluminium (A1203) are preferred.
Existing techniques for the deposition of oxide coatings such as electron beam evaporation and condensation in vacuo or sputtering in vacuo onto the film web may be used. Both these techniques are well known and start with the oxide as feedstock. The thickness of each oxide coating should be in a range such that it provides good adhesion to the substrate, and has good mechanical strength and barrier.
We prefer a coat weight of each oxide layer of 0.03 - 0.5 grams/metre2, with a coat weight of 0.15 - 0.3 grams/metre2 being especially preferred.
We have now found that it is also possible to form an oxide coating on the film by a process involving reactive evaporation, ie the element or metal rather than the oxide is used as the feedstock and this is reacted during evaporation with oxygen or a gas or vapour of a compound of oxygen (such as water vapour) such that the transparent oxide is deposited on the film. This process forms one aspect of the present invention and is described in more detail below.
The reactive evaporation can be carried out in a suitably modified conventional film metallising chamber. Drawing 1 shows a diagrammatic representation of one embodiment of the apparatus, which comprises a vacuum chamber X for depositing a layer of metal such as aluminium on one surface of a continuous web of plastic film. Within the chamber is a supply reel A from which film Y passes over a cooled drum B to take up reel C. An aperture and shutter assembly D controls the zone of evaporation of a metal supplied from a wire feed E to a ceramic heater block F maintained at a temperature above the evaporation temperature of the metal at the chamber pressure. The chamber is provided with viewing ports G and is connected at H to vacuum pumps.When used for conventional metallisation, vapourised metal from the heater flows in a zone of evaporation, indicated by broken lines Z, towards drum B and condenses on the film overlying the drum. In accordance with the present invention there is provided a discharge nozzle 10 connected by a pipe 11 to an inlet 12 for receiving a supply of a gas or vapour (not shown). The nozzle 10 is located within the zone Z and is directed in the direction of vapour flow from the heater to the drum.
Several such assemblies may be mounted across the chamber to facilitate coating of wide films. It is a crucial feature of the invention that the gas is introduced into the zone of vapourising metal. If the gas is merely introduced into the chamber outside this zone, this produces a pressure rise within the chamber causing unsatisfactory deposition and eventually the mean free path of the vapourised metal is so reduced that no deposition occurs. Unlike other known processes for reactive evaporation such as reactive sputtering, it is not necessary to use any electrical or plasma discharge to initiate the reaction.
Lamination of two oxide coated films (process (1) above) with two oxide coated surfaces adjacent can be carried out by any conventional lamination technique. The nature of the adhesive used is not critical, and it does not need to have inherent barrier properties. Various curing and noncuring packaging grade adhesives, or hot melt resin adhesives or extrusion lamination with a polyolefine or similar thermoplastic resin can be used. We prefer to use a moisture resistant, two component polyurethane curing adhesive.
The improvement in oxygen and moisture barrier achievable by laminating two oxide coated films in accordance with the present invention is considerably higher than might be anticipated from known technology. Thus it is normally anticipated that when two conventional plastic films, each with gas permeability X, are laminated together, the gas permeability of the laminate is approximately 0.5 X. In contrast, when two oxide coated films are laminated, in accordance with the present invention, improvements in barrier of typically 10 to 100 fold are achieved.
Application of an organic coating E to the oxide coated film (process (2) above) can be carried out by any conventional coating technique. Coating E can be any plastic resin coating with a thickness of less than 10 microns, which will adhere to and provide cover for a substantial percentage of the metallised surface of the substrate and give good adhesion to both oxide layers.
Such coatings include water-based, solvent-based, or solventless thermoplastic lacquers or inks based on resins such as polyester, nitrocellulose, acrylic, vinyl or polyvinylidene chloride, hot melt coatings, extrusion coated thermoplastic resins, and curing resin systems (cured by chemical cross-linking, ultra violet or electron beam irradiation or any other system). We prefer to use solvent-based polyester lacquers with a coating thickness of between 0.5 and 3 microns.
The improvement in oxygen and moisture barrier achievable by applying a thin plastic coating to the oxide coated film and recoating with oxide is again considerably higher than might be anticipated from known technology, with improvements in barrier of typically 10 to 100 fold. The presence of the thin plastic coating is crucial to the invention, and it is not necessary for said coating to have inherently good barrier properties. If the oxide coated film is merely recoated with oxide without the intermediate state of coating, the barrier improvement is limited to a factor of 2-3 at best.
Conversion of the materials of the invention into laminates with board suitable for carton manufacture can be carried out using conventional lamination techniques such as adhesive lamination or extrusion lamination using polyethylene. Typical constructions can include those below. For the function of the layers a-e refer to the description for a typical existing laminate given above.
1. a Polyethylene coating
b Board
c Polyethylene bonding layer
{ Poly (ethylene glycol) terephthalate film
{ Oxide coating
d { Adhesive
{ Oxide coating
{ Poly (ethylene glycol) terephthalate film
e Polyethylene heat sealable layer 2. a Polyethylene coating
b Board
c Polyethylene bonding layer
{ Oxide coating
d { Polyester coating
{ Oxide coating
{ Poly (ethylene glycol) terephthalate film
e Polyethylene sealing layer 3. a Polyethylene coating
b Board
c Polyethylene bonding layer
{ Oxide coating
d { Polyester coating
+ { Oxide coating
e { Polyethylene film 4. a Polyethylene coating
b Board
c Polyethylene bonding layer
{ Polyethylene film
d { Oxide coating
+ { Adhesive
e { Oxide coating ( Polyethylene film 5. a Polyethylene coating
b Board
c Adhesive
{ Polyethylene film
d { Oxide coating
+ { Adhesive
e { Oxide coating
{ Polyethylene film 6. a Polyethylene coating
b Board
c Adhesive
{ Poly (ethylene glycol) terephthalate film
d { Oxide coating
+ { Adhesive
e { Oxide coating
{ Polyethylene film
Other constructions are also possible.
Fabrication of cartons from these laminates can be carried out using conventional techniques. The laminate can be formed into a tube by sealing either surface e to itself (fin seal) or surface e to surface a (lap seal). In the latter case it is preferable to use the known technique of sealing a further strip of polyethylene or a polyethylene/ polyester/polyethylene composite along the longitudinal seal to avoid penetration of liquid from the carton into the board (see drawing 2). We have now found that a further improvement in the barrier of the carton is achieved if this strip is produced from a heat sealable barrier material, such as one of the materials of the invention, with a laminate of polyethylene film/oxide/ adhesive/oxide/polyethylene film being preferred.This is preferably applied in the form of an open tube, as shown in drawing 3 which will seal to itself and to the carton so that no exposed edge can come in contact with the carton contents. This technique can also be used to improve barrier of conventional (non-microwaveable) cartons by sealing the exposed edge with a tube of barrier laminate such as polyethylene/foil/polyethylene or polyethylene/ metallising/adhesive/metallising/polyethylene. Finally, the laminate tube can be transversely sealed and formed into a carton.
Whilst the materials of the invention are particularly useful for manufacture of microwave transparent cartons, they also have other uses. For example: a) They can be incorporated into flexible packaging
laminates for the packaging of oxygen or moisture
sensitive dry foods.
Typical constructions include: 1. { Poly (ethylene glycol) terephthalate film
{ Oxide coating
{ Polyester coating
{ Oxide coating
Polyethylene film 2. Reverse printed film
{ Oxide coating
{ Polyester coating { Oxide coating
{ Polyethylene film 3. { Poly (ethylene glycol) terephthalate film
{ Oxide coating
{ Adhesive
{ Oxide coating
{ Polyethylene film
Many other constructions are possible according to the requirements of the end use.
b) They can be included into flexible packaging laminates
for bag-in-box packaging of liquids sensitive to
oxygen and/or moisture.
Typical constructions include: 1. { Polyethylene film
{ Oxide coating
{ Adhesive
{ Oxide coating
{ Poly (ethylene glycol) terephthalate film
Adhesive
Ethylene vinyl acetate film 2. Polyethylene film
Adhesive
{ Oxide coating
{ Polyester coating
{ Oxide coating
{ Poly (ethylene glycol) terephthalate film
Adhesive
Ethylene vinyl acetate film.
Many other constructions are possible according to the requirements of the end use.
c) They can be used for lids or closures for packs of
fresh foods packed in a controlled gas atmosphere to
increase their shelf life (controlled or modified
atmosphere packaging). For this application, in
addition to the benefits of high barrier and
transparency, certain products of the invention offer
additional benefits. Many foodstuffs packed using
controlled atmosphere packaging such as vegetables or
bakery products, give off water vapour which will form
a mist on the inner surface of a lid made from
conventional plastic film and partially obscure the
foodstuff, giving the pack an unattractive appearance.
We have found that by using an oxide coated film with
the oxide surface facing the foodstuff, moisture
evolved from the foodstuff forms a transparent film
rather than a mist. This is particularly true of
oxide coatings applied by the reactive evaporation
technique.
Typical constructions suitable for controlled atmosphere packaging include: 1. { Poly (ethylene glycol) terephthalate film
{ Oxide coating
{ Polyester coating
{ Oxide coating 2. { Orientated polypropylene film
{ Oxide coating
{ Polyester coating
{ Oxide coating 3. { Polyethylene film
{ Oxide coating
{ Polyester coating
{ Oxide coating
In order that the invention may be more fully understood, the following Examples are given by way of illustration only.
EXAMPLE 1
A 2 metre wide web of 12 micron poly (ethylene glycol) terephthalate film (Melinex S ex ICI Films) was placed inside a metallising chamber similar to that shown diagrammatically in diagram 1 and threaded from the offwind position A, over the drum B onto the wind up position C.
18 ceramic heaters F were arranged across the web and spaced 20 centimetres from drum B. A nozzle 10 was located between each heater and the drum, all the nozzles being connected to the inlet 12 to which was connected a controllable supply of oxygen gas. Each nozzle was positioned at the centre of the evaporation zone of its associated heater and directed towards the drum. The chamber was evacuated to a pressure of 10-3 torr and aluminium wire fed to each heater at a rate of 30 grams/minute, the web being passed over the drum at a speed of 300 metres/minute.
Initially, and in the absence of oxygen, approximately 25% ot the aluminium evaporated was deposited on the web, giving a coating weight of 0.12 grams/metre6. Oxygen was then discharged through the nozzles and the flow rate increased until the coating on the film because just transparent, at which stage the flow rate was approximately 40 litres/minute. Chamber pressure was maintained at approximately 10-3 torr.
The aluminium oxide coated film was found to have a coat weight of 0.21 grams/metre2, an oxygen permeability of 5 cc/metre2/24 hours at 23 C/0% RH and an MVTR of 1.9 grams/ metre2/24 hours at 380C/90% RH. Surface energy of the oxide coated surface, determined by standard wetting tension pens, was greater than 72 dynes/cm, ie the film was wetted by water. Wetting tension of the uncoated poly (ethylene glycol) terephthalate film was 38-42 dynes/cm.
EXAMPLE 2
The aluminium oxide coated poly (ethylene glycol) terephalate film from example 1 was coated on its oxide surface with a layer of a commercially available two component polyurethane adhesive and dried to give a coat weight of 2.7 grams/metre2. The adhesive coated surface was then calendered to the oxide coated surface of a further ply of the same aluminium oxide coated poly (ethylene glycol) terephthalate film. After leaving for 1 week to allow the adhesive to cure, an oxygen permeability of 0.2 cc/metre2/24 hours at 230C, 0% RH and an MVTR of 0.4 gram/metre2/24 hours at 380C, 90% RH were measured on the laminate. The laminate could be formed into a container, filled with liquid, and heated effectively in a microwave oven without sparking.
A control sample in which the aluminium oxide coated film was laminated to uncoated poly (ethylene glycol) terephthalate film had an oxygen peremability of 3.8 cc/metre6/24 hours.
EXAMPLE 3
The aluminium oxide coated poly (ethylene glycol) terephthalate film from example 1 was coated on its oxide surface with a layer of a commercially available polyesterbased lacquer and dried to give a coat weight of 1.5 grams/ metre2, and a coat thickness of 1.5 microns. After lacquering, oxygen permeability was 4.2 cc/metre2/24 hours at 23qC, 08 RH and MVTR 1.8 grams/metre2/24 hours at 380C, 90% RH. The lacquered surface was recoated with a further 0.20 gram/metre2 of aluminium oxide by the process described in example 1. .The resultant film had an oxygen permeability of < 0.2 cc/metre2/24 hours at 23 C, 08 RH and an MVTR of 0.4 gram/metre2/24 hours at 380C, 90% RH, was transparent to microwaves, and had a wetting tension of greater than 72 dynes/cm.
A control in which the same aluminium oxide coated poly (ethylene glycol) terephthalate film was recoated with a further 0.21 gram/metre2 of aluminium oxide without applying an intermediate lacquer coating had an oxygen permeability of 3.4 cc/metre2/24 hours at 230C, 08 RH and an MVTR of 1.4 grams/metre2/24 hours at 380C, 90% RH.
EXAMPLE 4
The experiment described in example 2 was repeated using a poly (ethylene glycol) terephthalate film coated with 0.22 gram/metre2 of aluminium oxide by electron beam evaporation and condensation of that oxide in vacuo. This had an oxygen permeability after aluminium oxide coating of 5.4 cc/metre2/24 hours at 230C, 08 RH and an MVTR of 1.9 gram/metre2/24 hours at 380C, 90% RH. After lamination, oxygen permeability was < 0.2 cc/metre2/24 hours at 230C, 0%
RH and MVTR 0.4 gram/metre2/24 hours.
EXAMPLE 5
The experiment described in example 3 was repeated using the electron beam evaporated aluminium oxide coated poly (ethylene glycol) terephthalate film described in example 4. Oxygen permeability of the produce was < 0.2 cc/metre2/ 24 hours at 230C, 08 RH and MVTR 0.4 gram/metre2/24 hours at 380C, 90% RH.
EXAMPLE 6
The experiment described in example 3 was repeated using a poly (ethylene glycol) terephthalate film coated with 0.24 gram/metre2 of silicon dioxide by electron beam evaporation and condensation of that-oxide in vacuo. This had an oxygen permeability after silicon dioxide coating of 3.5 cc/metre2/24 hours at 230C, 0% RH and an MVTR of 1.4 grams/ metre2/24 hours at 380C, 90% RH. After lacquering and recoating with oxide, oxygen permeability was < 0.2 cc/ metre2/24 hours at 230C, 0% RH and MVTR 0.3 gram/metre2/ 24 hours at 380C, 90% RH.
EXAMPLE 7
The experiment described in example 2 was repeated using as substrate a 40 micron corona treated polyethylene film (Polyane CT ex Prosyn Polyane), which was coated on its treated side with 0.19 grams/metre2 of aluminium oxide by the process described in example 1. Before lamination, this film had an oxygen permeability of 90 cc/metre2/24 hours at 230C, 08 RH and an MVTR of 1.5 grams/metre2/24 hours at 380C, 90% RH. After lamination, oxygen permeability was 0.5 cc/metre2/24 hours and MVTR 0.2 gram/metre2/24 hours.
EXAMPLE 8
The experiment described in example 3 was repeated using as substrate a 20 micron corona treated oriented polypropylene film (Shorko M ex Shorko Films), which was coated on its treated surface with 0.21 gram/metre2 of aluminium oxide by the process described in example 1. Before lacquering and recoating with aluminium oxide, this film had an oxygen permeability of 70 cc/metre2/24 hours at 230C, 08 RH and an
MVTR of 1.7 gram/metre2/24 hours at 380C, 90% RH. After coating as described with lacquer and aluminium oxide, oxygen permeability was 0.9 cc/metre2/24 hours at 230C, 0%
RH and MVTR 0.5 gram/metre2/24 hours at 380C, 90% RH.
The invention includes: 1. A process for the production of a coating of a metallic
or non-metallic oxide on a plastic film which comprises
evaporation of a metal or non-metal in vacuo, reacting
it with oxygen or an oxygen containing gas or vapour,
and condensing the product on the film.
2. Any oxide coated film produced via the process
described in paragraph 1.
3. Any oxide coated film produced via the process
described in paragraph 1 which is substantially
transparent to microwaves.
4. An oxide coated film as described in paragraph 3 with a
barrier to oxygen of -better than 10 times the barrier
of the uncoated film.
5. An oxide coated film according to paragraphs 2-4
wherein the said film is poly (ethylene glycol)
terephthalate.
6. An oxide coated film according to paragraphs 2-4
wherein the said film is a heat sealable polyolefine.
7. An oxide coated film according to paragraphs 2-5
wherein the oxide is aluminium oxide.
8. An oxide coated film according to paragraphs 2-6
wherein the oxide is silicon dioxide.
9. An oxide coated film according to paragraphs 2-8
wherein the oxide coat weight is 0.03 - 0.5 gram/
metre2.
10. A plastic film laminate having low permeability to
gases and moisture which comprises two layers of
thermoplastic film coated with a metallic or non
metallic oxide and produced by either conventional
processes or the process described in paragraph 1,
joined together (with the oxide coated faces adjacent)
by a layer of adhesive.
11. An oxide coated plastics film composite having low
permeability to gases and moisture, which comprises a
thermoplastic film coated with a metallic or non
metallic oxide on at least one face, overcoated on said
oxide face with a substantially continuous thin plastic
coating of thickness less than 10 microns and then
recoated with oxide on the said face.
12. A laminate or composite according to paragraphs 10 or
11 wherein at least one of the said films is poly
(ethylene glycol) terephthalate.
13. A laminate or composite according to paragraphs 10 or
11, wherein at least one of the said films is nylon 6.
14. A laminate or composite according to paragraphs 10 or
11 wherein at least one of the said films is a heat
sealable polyolefine.
15. A laminate or composite according to paragraphs 10 - 14
wherein the oxide is aluminium oxide.
16. A laminate or composite according to paragraphs 10 - 14
wherein the oxide is silicon dioxide.
17. A laminate or composite according to paragraphs 10 - 16
wherein the oxide coat weight is 0.03 - 0.5 gram/
metre2.
18. A laminate or composite according to paragraphs 10 - 16
which is substantially transparent to microwaves.
19. A composite according to paragraph 11 or as modified by
paragraphs 12 - 18 wherein the said coating is
polyester and the coat thickness is as defined in
paragraph 11, thickness is as defined in claim 11, but
preferably 0.5 - 3.0 micron.
20. The use as a packaging material or as a component of a
packaging material of any of the materials described in
paragraphs 2 - 19.
21. The use of any transparent oxide coated film with good
gas barrier and high wetting tension in a package for
controlled atmosphere packaging.
22. The use of any of the materials as defined above having
an oxygen permeability of less than 1 cc/metre2/24
hours as a container or component of a container for
microwaveable foodstuffs.
23. The use of a heat sealable barrier laminate, whether or
not it is transparent to microwaves, in the form
defined in drawing 3, as a sealing strip for cartons.
24. The use of a heat sealable microwave transparent
barrier laminate or composite as defined in paragraphs
10 and 11 in the form defined in drawing 3, as a
sealing strip for cartons.
25. The use of a laminate according to paragraph 14 in the
form defined in drawing 3 as a sealing strip for
cartons.
Claims (26)
1. A plastics film laminate having low permeability to gases and moisture, which comprises two layers of thermoplastic film coated with a metallic or non-metallic oxide, joined together (with the oxide-coated faces adjacent) by a layer of adhesive.
2. An oxide-coated plastics film composite having low permeability to gases and moisture, which comprises a thermoplastic film coated with a metallic or non-metallic oxide on at least one face, overcoated on said oxide face with a substantially continuous thin plastic coating of thickness less than 10 microns and then recoated with oxide on the said face.
3. A laminate or composite according to claim 1 or 2, wherein at least one of the said films is poly (ethylene glycol) terephthalate, or nylon 6, or a heat sealable polyolefine.
4. A laminate or composite according to claim 1,2 or 3, wherein the oxide is aluminium oxide.
5. A laminate or composite according to claim 1,2,3 or 4, wherein the oxide is silicon dioxide.
6. A laminate or composite according to any of claims 1 to 5, wherein the oxide coat weight is 0.03 - 0.5 gram/metre2.
7. A laminate or composite according to any of claims 1 to 6, which is substantially transparent to microwaves.
8. A composite according to any of claims 2 to 7, wherein the said coating is polyester.
9. A composite according to claim 8, wherein the polyester coating thickness is 0.5 to 3.0 micron.
10. A process for the production of a coating of a metallic or non-metallic oxide on a plastic film which comprises evaporating a metal or non-metal i vacuo, reacting it with oxygen or an oxygen-containing gas or vapour, and condensing the product on the film.
11. An oxide-coated film produced by the process of claim 10.
12. An oxide-coated film according to claim 11, which film is substantially transparent to microwaves.
13. An oxide-coated film according to claim 12, with a barrier to oxygen of better than 10 times the barrier of the uncoated film.
14. An oxide-coated film according to any of claims 11 to 13, wherein the said film is poly (ethylene glycol) terephthalate.
15. An oxide-coated film according to any of claims 11 to 13, wherein the said film is a heat sealable polyolefine.
16. An oxide-coated film according to any of claims 11 to 15, wherein the oxide is aluminium oxide.
17. An oxide-coated film according to any of claims 11 t6 15, wherein the oxide is silicon dioxide.
18. An oxide-coated film according to any of claims 11 to 17, wherein the oxide coat weight is 0.03 - 0.5 gram/metre
19. A plastics film laminate according to any of claims 1 to 7, wherein at least one of the oxide-coated films is as claimed in any of claims 10 to 18.
20. An oxide-coated plastics film compasite according to any of claims 2 to 9, wherein said film and/or said plastic coated with oxide are as defined in any of claims 2 to 9.
21. The use as a packaging material or as a component of a packaging material of any of the materials as claimed in claims 1 to 9 or 11 to 20.
22. The use of a transparent oxide-coated film with good gas barrier and high wetting tension in a package for controlled atmosphere packaging.
23. The use of a material claimed in any of claims 1 to 9 or 11 to 20 and having an oxygen permeability of less than 1 cc/metre2/24 hours, as a container or component of a container for microwaveabie foodstuffs.
24. The use of a heat-sealable barrier laminate, whether or not it is transparent to microwaves, as a sealing strip for cartons substantially as shown in Fig. 3 of the accompanying drawings.
25. The use of a heat-sealable microwave transparent barrier laminate or composite as claimed in any of claims 1 to 9, 19 or 20 as a sealing strip for cartons, substantially as shown in Fig. 3 of the accompanying drawings.
26. The use of a laminate comprising a heat-sealable polyolefine as claimed in claim 3, as a sealing strip for cartons, substantially as shown in Fig. 3 of the accompanying drawings.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8724451A GB2210826B (en) | 1987-10-19 | 1987-10-19 | Barrier packaging materials |
GB9117752A GB2246795B (en) | 1987-10-19 | 1991-08-16 | Barrier packaging materials |
GB9117751A GB2246794B (en) | 1987-10-19 | 1991-08-16 | Production of oxide coatings on plastics films |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8724451A GB2210826B (en) | 1987-10-19 | 1987-10-19 | Barrier packaging materials |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8724451D0 GB8724451D0 (en) | 1987-11-25 |
GB2210826A true GB2210826A (en) | 1989-06-21 |
GB2210826B GB2210826B (en) | 1992-08-12 |
Family
ID=10625538
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8724451A Expired - Lifetime GB2210826B (en) | 1987-10-19 | 1987-10-19 | Barrier packaging materials |
GB9117752A Expired - Lifetime GB2246795B (en) | 1987-10-19 | 1991-08-16 | Barrier packaging materials |
GB9117751A Expired - Lifetime GB2246794B (en) | 1987-10-19 | 1991-08-16 | Production of oxide coatings on plastics films |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9117752A Expired - Lifetime GB2246795B (en) | 1987-10-19 | 1991-08-16 | Barrier packaging materials |
GB9117751A Expired - Lifetime GB2246794B (en) | 1987-10-19 | 1991-08-16 | Production of oxide coatings on plastics films |
Country Status (1)
Country | Link |
---|---|
GB (3) | GB2210826B (en) |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2650569A1 (en) * | 1989-08-04 | 1991-02-08 | Bowater Packaging Ltd | PACKAGING LAMINATE FOR FOOD PRODUCTS |
GB2236764A (en) * | 1989-10-14 | 1991-04-17 | Toyo Boseki | Vapour deposited film for overwrapping |
EP0437946A2 (en) * | 1989-12-20 | 1991-07-24 | Rexam Packaging Limited | Web barrier packaging material |
EP0460966A2 (en) * | 1990-06-08 | 1991-12-11 | Flex Products, Inc. | Barrier film having high colorless transparency and method of manufacture thereof |
DE4020999A1 (en) * | 1990-07-02 | 1992-01-09 | Tvg Thermo Vac Entwicklungs Gm | Continuous process for vacuum coated lacquered paper - has laminate built-up on endless steel carrier and then peeled off |
EP0485492A1 (en) * | 1989-08-03 | 1992-05-20 | E.I. Du Pont De Nemours And Company | Conformable microwave susceptor multilayer structure |
DE4113221A1 (en) * | 1991-04-23 | 1992-10-29 | Leybold Ag | Flexible transparent polymer film for e.g. packaging - has barrier layer on one side, produced by deposition of layer of silicon oxide under reactive atmos., pref. hydrogen@ |
US5271977A (en) * | 1989-02-10 | 1993-12-21 | Bridgestone Corporation | Low permeable rubber hose |
EP0578791A1 (en) * | 1991-11-12 | 1994-01-19 | Hunt Wesson, Inc. | Microwave package laminate with extrusion bonded susceptor |
US5792550A (en) * | 1989-10-24 | 1998-08-11 | Flex Products, Inc. | Barrier film having high colorless transparency and method |
WO2001081649A1 (en) * | 2000-04-20 | 2001-11-01 | Battelle Memorial Institute | Barrier coating |
WO2002016484A2 (en) * | 2000-08-24 | 2002-02-28 | The Coca-Cola Company | Multilayer polymeric/inorganic oxide structure for enhanced gas or vapor barrier |
FR2813555A1 (en) * | 2000-09-04 | 2002-03-08 | Rexam Beaute Metallisation | PROCESS FOR GIVING A SEMI-TRANSPARENT METALLIZED APPEARANCE TO CASE OR COSMETIC PACKAGING PARTS AND PARTS THUS OBTAINED |
US6576294B1 (en) * | 1989-10-24 | 2003-06-10 | Flex Products, Inc. | Method for forming barrier film |
US6740378B1 (en) | 2000-08-24 | 2004-05-25 | The Coca-Cola Company | Multilayer polymeric/zero valent material structure for enhanced gas or vapor barrier and uv barrier and method for making same |
EP1466725A1 (en) * | 2003-04-11 | 2004-10-13 | Amcor Flexibles Europe A/S | Transparent retort-stable high barrier laminates |
US6809144B1 (en) | 1998-11-09 | 2004-10-26 | Elkem Asa | Resin compositions, method of producing resin compositions and filler blends for use in resin compositions |
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US7648925B2 (en) | 2003-04-11 | 2010-01-19 | Vitex Systems, Inc. | Multilayer barrier stacks and methods of making multilayer barrier stacks |
US7985188B2 (en) | 2009-05-13 | 2011-07-26 | Cv Holdings Llc | Vessel, coating, inspection and processing apparatus |
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US2932590A (en) * | 1956-05-31 | 1960-04-12 | Battelle Development Corp | Indium oxide coatings |
US3442686A (en) * | 1964-03-13 | 1969-05-06 | Du Pont | Low permeability transparent packaging films |
DE1621246A1 (en) * | 1966-04-29 | 1971-04-29 | Bayer Ag | Process for surface treatment of plastics |
FR1559735A (en) * | 1967-12-28 | 1969-03-14 | ||
US3991234A (en) * | 1974-09-30 | 1976-11-09 | American Optical Corporation | Process for coating a lens of synthetic polymer with a durable abrasion resistant vitreous composition |
DE2748088B1 (en) * | 1977-10-27 | 1979-05-03 | W.C. Heraeus Gmbh, 6450 Hanau | Disc made of plastic that is not electrically charged and has a vapor-deposited oxide layer and process for its production |
GR79744B (en) * | 1982-12-10 | 1984-10-31 | Boc Group Plc | |
EP0151445B2 (en) * | 1984-01-26 | 1993-11-03 | Hitachi Maxell Ltd. | Production of magnetic recording medium |
-
1987
- 1987-10-19 GB GB8724451A patent/GB2210826B/en not_active Expired - Lifetime
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- 1991-08-16 GB GB9117752A patent/GB2246795B/en not_active Expired - Lifetime
- 1991-08-16 GB GB9117751A patent/GB2246794B/en not_active Expired - Lifetime
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US5271977A (en) * | 1989-02-10 | 1993-12-21 | Bridgestone Corporation | Low permeable rubber hose |
EP0485492A1 (en) * | 1989-08-03 | 1992-05-20 | E.I. Du Pont De Nemours And Company | Conformable microwave susceptor multilayer structure |
EP0485492A4 (en) * | 1989-08-03 | 1993-05-19 | E.I. Du Pont De Nemours And Company | Non-melting microwave susceptor films |
FR2650569A1 (en) * | 1989-08-04 | 1991-02-08 | Bowater Packaging Ltd | PACKAGING LAMINATE FOR FOOD PRODUCTS |
GB2236764A (en) * | 1989-10-14 | 1991-04-17 | Toyo Boseki | Vapour deposited film for overwrapping |
US5792550A (en) * | 1989-10-24 | 1998-08-11 | Flex Products, Inc. | Barrier film having high colorless transparency and method |
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EP0437946A2 (en) * | 1989-12-20 | 1991-07-24 | Rexam Packaging Limited | Web barrier packaging material |
EP0437946A3 (en) * | 1989-12-20 | 1991-07-31 | Bowater Packaging Limited | Web barrier packaging material |
EP0460966A2 (en) * | 1990-06-08 | 1991-12-11 | Flex Products, Inc. | Barrier film having high colorless transparency and method of manufacture thereof |
EP0460966A3 (en) * | 1990-06-08 | 1995-01-04 | Flex Products Inc | |
DE4020999A1 (en) * | 1990-07-02 | 1992-01-09 | Tvg Thermo Vac Entwicklungs Gm | Continuous process for vacuum coated lacquered paper - has laminate built-up on endless steel carrier and then peeled off |
DE4113221A1 (en) * | 1991-04-23 | 1992-10-29 | Leybold Ag | Flexible transparent polymer film for e.g. packaging - has barrier layer on one side, produced by deposition of layer of silicon oxide under reactive atmos., pref. hydrogen@ |
EP0578791A4 (en) * | 1991-11-12 | 1994-04-06 | Hunt-Wesson, Inc. | |
EP0578791A1 (en) * | 1991-11-12 | 1994-01-19 | Hunt Wesson, Inc. | Microwave package laminate with extrusion bonded susceptor |
US6809144B1 (en) | 1998-11-09 | 2004-10-26 | Elkem Asa | Resin compositions, method of producing resin compositions and filler blends for use in resin compositions |
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US8955217B2 (en) | 1999-10-25 | 2015-02-17 | Samsung Display Co., Ltd. | Method for edge sealing barrier films |
WO2001081649A1 (en) * | 2000-04-20 | 2001-11-01 | Battelle Memorial Institute | Barrier coating |
US6811826B2 (en) | 2000-08-24 | 2004-11-02 | The Coca-Cola Company | Multilayer polymeric/zero valent material structure for enhanced gas or vapor barrier and UV barrier and method for making same |
US6740378B1 (en) | 2000-08-24 | 2004-05-25 | The Coca-Cola Company | Multilayer polymeric/zero valent material structure for enhanced gas or vapor barrier and uv barrier and method for making same |
US6808753B2 (en) | 2000-08-24 | 2004-10-26 | The Coca-Cola Company | Multilayer polymeric/inorganic oxide structure with top coat for enhanced gas or vapor barrier and method for making same |
WO2002016484A2 (en) * | 2000-08-24 | 2002-02-28 | The Coca-Cola Company | Multilayer polymeric/inorganic oxide structure for enhanced gas or vapor barrier |
US6720052B1 (en) | 2000-08-24 | 2004-04-13 | The Coca-Cola Company | Multilayer polymeric/inorganic oxide structure with top coat for enhanced gas or vapor barrier and method for making same |
WO2002016484A3 (en) * | 2000-08-24 | 2002-06-20 | Coca Cola Co | Multilayer polymeric/inorganic oxide structure for enhanced gas or vapor barrier |
WO2002020282A1 (en) * | 2000-09-04 | 2002-03-14 | Rexam Beaute Metallisation | Method for providing a semitransparent metallic aspect to cosmetic case or compact components and resulting components |
US6946162B2 (en) | 2000-09-04 | 2005-09-20 | Rexam Beaute Mettallisation | Method for providing a semitransparent metallic aspect to cosmetic case or compact components and resulting components |
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Also Published As
Publication number | Publication date |
---|---|
GB2210826B (en) | 1992-08-12 |
GB9117752D0 (en) | 1991-10-02 |
GB2246795B (en) | 1992-06-24 |
GB9117751D0 (en) | 1991-10-02 |
GB8724451D0 (en) | 1987-11-25 |
GB2246795A (en) | 1992-02-12 |
GB2246794B (en) | 1992-06-24 |
GB2246794A (en) | 1992-02-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 20071018 |