AU711542B2 - A packaging material with an O2 barrier - Google Patents

A packaging material with an O2 barrier Download PDF

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Publication number
AU711542B2
AU711542B2 AU23803/97A AU2380397A AU711542B2 AU 711542 B2 AU711542 B2 AU 711542B2 AU 23803/97 A AU23803/97 A AU 23803/97A AU 2380397 A AU2380397 A AU 2380397A AU 711542 B2 AU711542 B2 AU 711542B2
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AU
Australia
Prior art keywords
packaging material
material according
coating
plastic film
organic coating
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
AU23803/97A
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AU2380397A (en
Inventor
Kirsten Lykke
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.)
DuPont Nutrition Biosciences ApS
Original Assignee
Danisco AS
Danisco US Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danisco AS, Danisco US Inc filed Critical Danisco AS
Publication of AU2380397A publication Critical patent/AU2380397A/en
Application granted granted Critical
Publication of AU711542B2 publication Critical patent/AU711542B2/en
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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/048—Forming gas barrier coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0081—Tear strength
    • 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
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • 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
    • B32B2307/7244—Oxygen barrier
    • 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
    • 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
    • B32B2369/00—Polycarbonates
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Packages (AREA)

Description

Title: A packaging material with an Q2 barrier.
Technical Field The invention relates to a packaging material with an 02 barrier, in particular for flexible packagings.
Background Art When packaging certain products such as foodstuffs which are sensitive to oxygen and/or water vapour it is known to use packaging materials in form of plastic laminates having a barrier against ingress of oxygen and/or water vapour. It is also known to use such laminates with barrier properties for packaging foodstuffs in a gas atmosphere in order prevent the gas from leaving the package.
Said barrier properties can be obtained by means of a metallisation layer forming part of the plastic laminate. It is further from US-A-4.457.977 and EP-A-2-0 340 910 known that improved barrier properties are obtained by coating a plastic film with an organic coating subsequently being metallised.
In order to provide transparent or translucent packaging materials with barrier properties it has been suggested to coat plastic films with transparent metal oxides or nonmetal oxides by vacuum deposition (confer GB-B-22 108 826, GB-B-2 246 794, GB-B- 22 46 795 and EP-B-00 70 875). An 02 barrier greater than 1 cm 3 /m 2 /24 hours is obtained thereby.
Further EP-B-00 70 875 and EP-A-0 437 946 disclose the combination of metal coating and metal oxide coating to obtain improved barrier properties while maintaining the transparent or translucent character of the packaging material. It further appears from the publications that the plastic film can be primed prior to the metal/metal oxide deposition.
AMENDED 13H7 EP 0 723 860 discloses a packaging material comprising a film coated with an inorganic coating of silicon oxide and a film of polyolefine. An adhesive disposed between the silicon oxide and the film of polyolefine is a thermoplastic resin containing at least one hydroxyl function. The silicon oxide coating is not provided on an organic coating comprising EVOH or PVOH.
Finally, WO 95/34396 discloses a transparent film composition comprising a polymeric substrate with a modified propylene surface, an organic skin layer (EVOH skin layer) on the modified propylene layer and a transparent metal oxide gas barrier layer deposited on the EVOH layer.
The following processes are mentioned for the provision of the EVOH layer: 1) coextrusion of a EVOH skin and the modified substrate; 2) extrusion coating of the EVOH layer onto the surface of the modified substrate; and 3) co-lamination of a thin film of EVOH onto the surface of the modified polypropylene sheet.
Brief Description of the Invention The present invention provides a packaging material with an 02 barrier, in particular for flexible packagings, and which comprises a plastic film coated with an organic coating applied to the plastic film in fluid form, said organic coating overcoated with an inorganic coating comprising a metal oxide or a non-metal oxide and which packaging material is characterised in that the organic coating comprises at least one of the materials ethylene vinyl alcohol (EVOH) and polyvinyl alcohol (PVOH) and is prepared from a dispersion or a solution comprising at least one of the materials EVOH and PVOH. By applying the metal oxide or non-metal oxide coating to an EVOH or PVOH coating, improved barrier properties have surprisingly been obtained compared to a direct application of the metal oxide or non-metal oxide coating to the plastic film or to a primer without barrier properties coated on the plastic film. An 02 permeability of 0.1 cm 3 /m 2 /24 hours has thus been obtained. Moreover it has been found that said RAi K 'SiT_ O~ AE DE S H'E good 02 barrier properties are maintained after flexure (Gelbo flexures) in spite of the high brittleness of the metal oxide or the non-metal oxide coating. The good barrier properties are believed to be caused by a more smooth surface provided by the EVOH or PVOH coating providing a more smooth and uniform metal oxide or non-metal oxide coating and by a synergistic effect between the EVOH or PVOH coating and the metal oxide or non-metal oxide coating. The good 02 barrier properties obtained after flexure are believed to be caused by the elasticity of the EVOH or PVOH layer and a surprisingly good adhesion between the EVOH or PVOH coating and the metal oxide or the non-metal oxide coating as well as by the above synergistic effect of the two coatings.
According to the invention a primer layer may be provided between the plastic film and the organic coating (EVOH or PVOH coating) to increase the adhesion of the organic coating to the plastic film.
Furthermore according to the invention the organic coating per se may have an 02 permeability of less than 10 cm 3 /m 2 /24 hours, preferably of less than 5 cm 3 /m 2 /24 hours.
Moreover according to the invention the organic coating may be of a thickness of to 3 um, preferably of between 0.7 to 1.8 In practice, excellent results have been obtained at an organic coating thickness of 1.2 izm corresponding to an 02 permeability of about 3 cm 3 /m 2 /24 hours of said coating. The coating may be provided by means of any known coating process such as roll coating, for instance smooth roller coating, gravure roller coating, spray coating and dip coating. In practice excellent results have been obtained by smooth roll coating.
According to the invention the plastic film may be oriented in the machine direction and preferably biaxially oriented.
According to the invention the plastic film preferably being a transparent film may comprise at least one material chosen from among polyolefines, polyamides, polyesters x 3
T.
and polycarbonates. In this connection it should be noted that the transparent film advantageously may be reverse printed and provided with an intermediary primer layer before being coated with the organic coating and the inorganic coating on the printed side.
Moreover according to the invention the organic coating may comprise an oxide chosen from the group comprising aluminium oxides, magnesium oxides and silicon oxides.
In this connection it should be noted that in addition to the said oxides the inorganic coating may also comprise the corresponding metals or non-metals, preferably the amount of the latter being such that the inorganic coating remains transparent or at least translucent.
Furthermore according to the invention the inorganic coating may have a thickness of between 50-1000 Angstrom, preferably of between 100-300 Angstrom.
Finally according to the invention when seen in the direction from the plastic film towards the coatings the packaging material may comprise an inner sealing medium layer arranged after the coatings and comprising a polyolefine, preferably polyethylene or polypropylene or copolymers thereof.
Brief Description of the Drawing The invention is explained in detail below with reference to the drawing whose only illustration is a sectional view through an embodiment of the packagaging material according to the invention.
Best Mode for Carrying Out the Invention When seen from the outer face towards the inner face of a package the shown packaging material comprises an outer, substantially transparent film 1, which may be a single layered film or a laminate formed of several films, and preferably comprises a polyolefine, a polyamide or a polyester being biaxially oriented. The outer film 1 is reverse AMENDED SHEET printed on its inwardly facing surface. A primer 3 is coated on the print 2 to provide good adhesion to an organic coating 4 comprising EVOH or PVOH. The organic coating 4 is applied to the primer in form of a solution or dispersion which is dried after application by roller coating. An inorganic coating 5 is vacuum deposited on the EVOH or PVOH layer 4, said coating 5 comprising metal oxide, preferably in form of an aluminium oxide or magnesium oxide, or a non-metal oxide, preferably in form of a silicon oxide. An inner sealing medium layer 7 is adhered to the inorganic coating by means of an adhesive 6. The inner heat sealing layer 7 is typically a polyolefine, preferably a polyethylene or a copolymer thereof.
The invention is further illustrated by means of the following examples: Example 1 A biaxially oriented polyester (PETP) film 1 having a thickness of 12 tim was coated AV£|'^'jSoi ofs^ 0 00 0 4 with a polyurethane-based primer 3 on its inwardly facing side. The primer 3 was coated with an EVOH coating in form of an alcohol/water solution of an EVOH granulate. An amount of about 1.2 g/m 2 (dry weight) was deposited corresponding to a thickness of about 1 um (dried). The EVOH coating was dried. An A1 2 0 3 coating of a thickness of about 150 Angstrom was vacuum deposited on the EVOH coating. A PE film was laminated to the A1 2 0 3 coating 5 by means of a two-component polyurethane adhesive 6.
The prepared laminate was transparent and had an 02 permeability 0.1 cm 3 /m 2 /24 hours.
A Gelbo flexure test showed that the 02 barrier remained unchanged after twenty Gelbo flexures performed according to MIL-V-131G, FED-STD-101, Method No 2017.
Example 2 Comparative example A laminate was made as described in Example 1, the EVOH coating being omitted.
The laminate had an 02 permeability of about 4 cm 3 /m 2 /24 hours prior to flexure.
After twenty Gelbo flexures the laminate had an 02 permeability of about 25 cm 3 m 2 /24 hours.
The two Examples show that a significantly improved 02 barrier was obtained by the combined EVOH and A1 2 0 3 coating both before and after flexure compared to an A1 2 0 3 coating without an EVOH coating. The high 02 barrier both before and after flexure is considered surprising although the used EVOH coating per se has an 02 permeability of about 3 cm 3 /m 2 /24 hours.
I AMENDED SHEET .C~~Fi r-

Claims (13)

1. A packaging material with an 0 2 barrier, in particular for flexible packagings, and which comprises a plastic film coated with an organic coating applied to the plastic film in fluid form, said organic coating overcoated with an inorganic coating comprising a metal oxide or a non-metal oxide, characterised in that the organic coating comprises at least one of the materials ethylene vinyl alcohol (EVOH) and polyvinyl alcohol (PVOH) and is prepared from a dispersion or a solution comprising at least one of the materials EVOH and PVOH.
2. A packaging material according to claim 1, characterised by a primer layer provided between the plastic film and the organic coating (the EVOH or PVOH coating).
3. A packaging material according to claim 1 or claim 2, characterised in that the organic coating per se has an 02 permeability of less than 10cm 3 /m 2 /24 hours.
4. A packaging material according to claim 3, characterised in that the organic coating has an 02 permeability of less than 5cm 3 /m 2 /24 hours. 15 5. A packaging material according to any one of the preceding claims, characterised in that the organic coating is of a thickness of 0.5 to 3um.
6. A packaging material according to claim 5, characterised in that the organic coating is of a thickness of between 0.7 to 1.8p.m.
7. A packaging material according to any one of the preceding claims, characterised in that the plastic film at least is oriented in the machine direction.
8. A packaging material according to claim 7, characterised in that the plastic film is biaxially oriented.
9. A packaging material according to claim 7 or claim 8, characterised in that the plastic film comprises at least one material chosen from among polyolefins, polyamides, polyesters and polycarbonates. A packaging material according to any one of the preceding claims, characterised in that the inorganic coating comprises an oxide selected from the group comprising aluminium oxides, magnesium oxides and silicon oxides.
11. A packaging material according to claim 10, characterised in that the inorganic coating has a thickness of between 0.005pm-0.1 pm.
12. A packaging material according to claim 11, characterised in that the thickness is between 0.01 tm-0.03.tm.
13. A packaging material according to any one of the preceding claims, characterised in that when seen in direction from the plastic film towards the coatings it comprises an inner sealing medium layer arranged after the coatings and comprising a polyolefin.
14. A packaging material according to claim 13, characterised in that the polyolefin is polyethylene or polypropylene or copolymers thereof. [n:\libc]00035:MEF A packaging material with an 02 barrier, substantially as hereinbefore described with reference to any one of the examples but excluding the comparative examples.
16. A packaging material with an 02 barrier, substantially as hereinbefore described with reference to the accompanying drawings. Dated 4 November, 1998 Danisco A/S Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON G 0 0 0e *0*00* *00 oS S.. 0 [n:\libc]00035:MEF
AU23803/97A 1996-04-12 1997-04-08 A packaging material with an O2 barrier Ceased AU711542B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DK41996 1996-04-12
DK419/96 1996-04-12
DK94796 1996-09-04
DK947/96 1996-09-04
PCT/DK1997/000148 WO1997038852A1 (en) 1996-04-12 1997-04-08 A packaging material with an o2 barrier

Publications (2)

Publication Number Publication Date
AU2380397A AU2380397A (en) 1997-11-07
AU711542B2 true AU711542B2 (en) 1999-10-14

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ID=26063965

Family Applications (1)

Application Number Title Priority Date Filing Date
AU23803/97A Ceased AU711542B2 (en) 1996-04-12 1997-04-08 A packaging material with an O2 barrier

Country Status (11)

Country Link
EP (1) EP0892718A1 (en)
JP (1) JP2000508260A (en)
AU (1) AU711542B2 (en)
BR (1) BR9708623A (en)
CA (1) CA2249457A1 (en)
CZ (1) CZ314198A3 (en)
HU (1) HUP9901593A3 (en)
NO (1) NO313955B1 (en)
NZ (1) NZ332016A (en)
PL (1) PL329282A1 (en)
WO (1) WO1997038852A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2368301A (en) * 2000-10-26 2002-05-01 Abdul Aziz Okhai Coating a packaging material with ethylene vinyl alcohol
DE20307771U1 (en) * 2003-05-19 2004-09-23 Cofresco Frischhalteprodukte Gmbh & Co. Kg Coating and bag

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995034396A1 (en) * 1994-06-10 1995-12-21 Mobil Oil Corporation Film composition

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960010127B1 (en) * 1988-12-05 1996-07-26 미츠비시 가가꾸 가부시키가이샤 Moisture-proof film
TW267975B (en) * 1992-10-20 1996-01-11 Toppan Printing Co Ltd
FR2729888A1 (en) * 1995-01-26 1996-08-02 Atochem Elf Sa PACKAGING MATERIAL COMPRISING A SILICON OXIDE LAYER AND A POLYOLEFIN LAYER

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995034396A1 (en) * 1994-06-10 1995-12-21 Mobil Oil Corporation Film composition

Also Published As

Publication number Publication date
HUP9901593A3 (en) 2001-01-29
AU2380397A (en) 1997-11-07
PL329282A1 (en) 1999-03-15
WO1997038852A1 (en) 1997-10-23
CA2249457A1 (en) 1997-10-23
EP0892718A1 (en) 1999-01-27
NO984716D0 (en) 1998-10-09
NO984716L (en) 1998-10-09
HUP9901593A2 (en) 1999-08-30
NZ332016A (en) 1999-07-29
BR9708623A (en) 1999-08-03
CZ314198A3 (en) 1999-01-13
NO313955B1 (en) 2003-01-06
JP2000508260A (en) 2000-07-04

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