WO2008025085A1 - Hydrophobic packaging material including a sulphite salt - Google Patents
Hydrophobic packaging material including a sulphite salt Download PDFInfo
- Publication number
- WO2008025085A1 WO2008025085A1 PCT/AU2007/001264 AU2007001264W WO2008025085A1 WO 2008025085 A1 WO2008025085 A1 WO 2008025085A1 AU 2007001264 W AU2007001264 W AU 2007001264W WO 2008025085 A1 WO2008025085 A1 WO 2008025085A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- packaging material
- packaging
- sulphur dioxide
- sulphite
- food
- Prior art date
Links
Classifications
-
- 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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/42—Applications of coated or impregnated materials
-
- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
- B65D77/06—Liquids or semi-liquids or other materials or articles enclosed in flexible containers disposed within rigid containers
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12H—PASTEURISATION, STERILISATION, PRESERVATION, PURIFICATION, CLARIFICATION OR AGEING OF ALCOHOLIC BEVERAGES; METHODS FOR ALTERING THE ALCOHOL CONTENT OF FERMENTED SOLUTIONS OR ALCOHOLIC BEVERAGES
- C12H1/00—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages
- C12H1/12—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages without precipitation
- C12H1/14—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages without precipitation with non-precipitating compounds, e.g. sulfiting; Sequestration, e.g. with chelate-producing compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
Definitions
- the present invention relates to materials for packaging (hereinafter referred to as "packaging materials”) food or beverage products.
- the present invention also relates to packaging products, such as containers, that are constructed at least in part from packaging materials.
- packaging materials are in the form of polymeric films
- the packaging products are the packaging materials per se.
- the present invention relates to packaging materials that are made from polymers or polymer blends or other materials that are suitable for use as packaging products for packaging food and beverage products or for manufacturing such packaging products.
- packaging refers to containment of food or beverage products both in packaging intended for distribution of food and beverage products to consumers and packaging intended for manufacturing, storing and other steps in the production of food or beverage products .
- An example of an application for the packaging materials of this invention is packaging products in the form of retail ⁇ bag-in ⁇ box' wine casks.
- Bag-in-box wine casks typically comprise ⁇ bladders' that are made from packaging materials in the form of polymeric films and have taps for dispensing the wine in the bladders and are enclosed inside cardboard boxes or tubes that are designed to protect the bladders and hold them in a controlled shape .
- Another application of this invention is packaging products in the form of polymeric bags or liners made from packaging materials in the form of polymeric films that are used as part of the wine production process or for the bulk shipping of wine from a winemaking operation to a final market, which may be a different country or continent .
- packaging products made from packaging products in the form of flexible polymeric films
- this present invention is also applicable to packaging products, such as bottles, that are made from packaging materials in the form of rigid blow-moulded or injection-moulded polymeric packaging materials .
- Another application of this invention is packaging products in the form of liners of polymeric materials, such as polymeric material liners used to protect the inside of food and beverage cans from corrosion.
- Materials used for manufacturing packaging materials comprise, by way of example, polymeric materials such as low density polyethylene, high density polyethylene, polypropylene , ionomers , ethylene and propylene copolymers, polylactic acid or other polyesters, polyamides , vinyl alcohol polymers or copolymers , degradable polymers, or other polymer materials which may be identified as suitable.
- the materials may further comprise additives which impart further functional properties such as physical property modification, emission of gases or liquids, or absorption of gases or liquids.
- the present invention relates more particularly, although by no means exclusively, to packaging materials for food and beverage products in situations where it is desirable or essential to maintain or extend the shelf life of food or beverage products .
- the present invention relates more particularly, although by no means exclusively, to packaging materials for packaging food and beverage products that have one or more than one active additive that positively influence the shelf stability of the packaged products .
- the present invention relates to maintaining levels of free sulphur dioxide in wine, and the following description of the present invention focuses on this application.
- the present invention is equally applicable to other beverage and food products where sulphur dioxide is used as an anti-oxidant, including for example fruit juices and beers .
- Sulphur dioxide is routinely added to wine during processing of the wine and filling of packages to preferentially react with any free oxygen in the product to reduce oxidation of the wine and thereby avoid deterioration in the flavour of wine caused by the oxidation of the wine components .
- high levels of sulphur dioxide are undesirable because sulphur dioxide can adversely affect the taste of wine.
- the sulphur dioxide found in wine exists in two different forms .
- Bound' sulphur dioxide is chemically bound to other compounds in wine, such as aldehydes .
- Free sulphur dioxide is not bound to other compounds , and so is free to react with any oxygen present.
- Sulphur dioxide is not necessarily added directly into wine, but may instead be added in the form of sulphites which break down into sulphur dioxide in the wine .
- Oxygen can enter a filled container of wine both during filling wine into the container and also during the storage of the wine in the container.
- small amounts of oxygen can diffuse through the packaging materials used to hold the wine, as well as its dispensing features .
- the sulphur dioxide added with the filled container is consumed through its reaction with the oxygen in the wine. Once the free sulphur dioxide is fully consumed, there will be undesirable oxidation of the wine.
- bound sulphur dioxide in the product converts to free sulphur dioxide, which releases other undesirable components such as aldehydes to which the sulphur dioxide was formerly bound.
- the present invention provides the use of active additives in packaging materials , such as polymeric films , which release sulphur dioxide into the packaged products over time and reduce the rate of decrease of free sulphur dioxide in the products over time .
- the present invention is based on the realisation that the inclusion of a sulphite salt, and optionally further additives , in one or more than one layer of a packaging material, such as a polymeric film, is an effective a source of sulphur dioxide .
- the present invention is also based the realisation that the use of an alkaline additive in a packaging material, such as a polymeric film, can provide an additional controlling mechanism for the release rate of sulphur dioxide by regulating penetration of product acids into the packaging material .
- European patent application EP 0 351 636 discloses a packaging material comprising two sheets of material which are laminated together with a binding — Q _
- the binding agent has dispersed therein a sulphur dioxide releasing material such as sodium metabisulphite .
- a hydrophilic polymer is used to contain the sodium metabisulphite. This invention suffers from the inherent instability of sodium metabisulphite, which has a significant rate of uncontrolled release of sulphur dioxide in storage, and is an occupational health hazard.
- a) is not confined to the use of a hydrophilic film, but instead can use modifications of existing commercial packaging materials - hydrophilic materials have a number of inherent disadvantages when used to contain beverages and water containing food and;
- d) comprises as an embodiment further means of reducing migration of acids from the wine to the sulphite compound, whereby the release of free sulphur dioxide can be optimally controlled.
- ⁇ hydrophilic' material is defined as a material with a measured WVTR of greater than or equal to 100 g/m 2 .day. In this specification WVTR is measured for a 25 urn thick sample of the material using ASTM F1249 measured at 38° C and 95% relative humidity.
- a hydrophobic' material is defined as a material with a measured WVTR of less than 100 g/m 2 .day under the same conditions.
- a hydrophobic packaging material for packaging food or beverage products that includes one or more than one sulphite salt as a source of sulphur dioxide in one or more than one layer of polymeric material or materials that form the packaging material .
- a person skilled in the art will be readily able to determine the amount of calcium sulphite to be added to a packaging material in any given situation .
- the amount of sulphite salt in any given situation depends on the volume of the food or beverage product contained in the filled package .
- the level of sulphite added is typically selected to add a given amount of free sulphur dioxide after reaction with the acids in the wine .
- a wine maker might wish to add a total of 50 ppm (mg/1) of free sulphur dioxide to a wine, assuming a complete reaction of the available calcium sulphite .
- the wine maker knows that free sulphur dioxide is the excess sulphur dioxide after the total bound sulphur dioxide has reached an equilibrium level, i.e. adding 10 ppm free sulphur dioxide to a wine containing 10 ppm free sulphur will lead to a total sulphur dioxide level of 20 ppm.
- the wine maker might select a packaging material in the form of a polymeric film to contain 3 litres of wine, and might have selected a 150 mm by 200 mm by 100 mm bladder to contain this wine. This would give a total contact area of 0.13 m2 , or allowing for sealing area a total film area of say 0.14 m2.
- the wine maker knows that calcium sulphite reacts with acid to create hydrogen sulphite, which in turn breaks down into sulphur dioxide and water. By stoichemetric calculations the winemaker is able to determine that 1 gram of calcium sulphite gives 0.53 grams of sulphur dioxide.
- the desired calcium sulphite loading might also depend on other factors such as the planned shelf life of the wine, the purity of calcium sulphite, the efficiency of the manufacturing process, and many other variables. In some cases it might be desirable to target a total sulphur dioxide addition level of greater or less than 50 ppm.
- the amount of the sulphite salt or salts is selected to add less than 200 ppm of sulphur dioxide to the contents of the food or beverage product.
- the amount of the sulphite salt or salts is selected to add less than 100 ppm of sulphur dioxide to the contents of the food or beverage product.
- the amount of the sulphite salt or salts is selected to add less than 50 ppm of sulphur dioxide to the contents of the food or beverage product.
- the sulphite salt content in the packaging material will be between 5 and 20% by weight.
- the packaging material may be a polymeric film.
- the packaging material may also be a blow-moulded or an injection-moulded polymeric material, such as used in the construction of bottles .
- the sulphite salt or salts is selected from sulphite salts that are thermally stable at or above extrusion temperatures of the polymeric material or materials and are chemically inert in the presence of the molten polymer .
- the sulphite salt is a calcium sulphite.
- the above-described packaging material may include at least one layer (hereinafter referred to as a ⁇ sealing layer') that has acceptable heat sealing properties and can be used to help form the packaging film into a liquid tight container .
- a ⁇ sealing layer' at least one layer that has acceptable heat sealing properties and can be used to help form the packaging film into a liquid tight container .
- the sealing layer may also be a sulphite salt- containing layer .
- the polymeric material in the layer or layers of the packaging material may be any polymeric material that is chemically stable in the presence of the sulphite salt or salts .
- these polymeric materials are a polyolefin or a polyester.
- the packaging material may include an alkaline material to control the release of sulphur dioxide from the packaging material .
- the alkaline material is adapted to react with migrating acids in a packaged product, thereby effectively reducing the ability of the acids to react with the sulphite salt or salts and produce sulphur dioxide .
- the alkaline material is a metal oxide .
- the metal oxide is an aluminium oxide .
- the alkaline material may be added to any one or more than one layer in the packaging material that contains the sulphite salt or salts, such as the calcium sulphite, to control the release of sulphur dioxide.
- the alkaline material may be added to any one or more than one layer in the packaging material that does not contain the sulphite salt or salts , such as the calcium sulphite.
- the alkaline material may be added into the layer or layers of the packaging material, such as a polymeric film, adjacent to the wine and the sulphite salt or salts may be added to an inner layer or layers of the packaging material, which may be the same or different layer or layers.
- the sulphite salt or salts may be added to an inner layer or layers of the packaging material, which may be the same or different layer or layers.
- the alkaline material may be blended into one or more than one of the layers of the packaging material to reduce the rate of sulphur dioxide release by co-reacting with acids migrating into the layer or layers .
- the alkaline material has a concentration not exceeding 25% of the total weight of the packaging material .
- the alkaline material has a concentration not exceeding 15% of the total weight of the packaging material .
- hydrophobic!ty of the packaging material of the present invention is important because a material that is hydrophilic, i.e. has an excessive water vapor transmission rate ( ⁇ WVTR'), would not work as intended as the reaction between the acids in the wine and the sulphur dioxide producing salt would be at an excessive rate, leading to an uncontrolled and excessive buildup of free sulphur dioxide in the wine .
- ⁇ WVTR' water vapor transmission rate
- the sulphite salt or salts and the alkaline material may be blended with the polymeric material or materials prior to extrusion or co-extrusion.
- the layer or layers of the packaging material of present invention may comprise additives in the form of concentrated dispersions (or masterbatch) of the active component in suitable polymers permitting selection at manufacture of blend rations and thus final material performance.
- a packaging product such as a container, for packaging products , such as food or beverage products , that includes the above-described packaging material, such as a polymeric film, with a sulphite salt addition and optionally an alkaline material addition so as to control the release of sulphur dioxide from the packaging product.
- the packaging material may be a polymeric film.
- the packaging material may also be a blow-moulded or an injection-moulded polymeric material, such as used in the construction of bottles, closures, tubs, cups and the like.
- the container may be made from a packaging material in the form of a flexible polymeric film, such as a "wine cask” or M bag-in-box” cask, or be used for the manufacturing or fermenting of the food or beverage .
- a packaging material in the form of a flexible polymeric film, such as a "wine cask” or M bag-in-box” cask, or be used for the manufacturing or fermenting of the food or beverage .
- CaSO 3 were placed in 20 iriL headspace vials and filled with recently purchased commercial riesling wine .
- Control vials were also filled with the wine, but no disc was added.
- Sodium metabisulphite was added to both samples at a level designed to add the equivalent to an additional 50 ppm of free sulphur dioxide for both the test samples and the corresponding blanks .
- the vials were stored at 23 0 C and 50% humidity.
- the free sulphur dioxide content was determined at 0, 1, 3, 7, 14 and 28 days via the aspiration method 1 with the samples and blanks analysed in duplicate.
- Figure Ia shows a plot of the level of free sulphur dioxide in the wine over the test duration. The figure shows that the wine began to lose free sulphur dioxide immediately, possibly due to reaction with the oxygen added into the wine during the filling of the vials . There is only a small difference between the measured free sulphur dioxide levels for the first two weeks, but a large difference after 28 days.
- Figure Ib shows a plot of the difference between the levels of free sulphur dioxide in the wine in the no disc and disc samples. The figure suggests that the sulphite discs are adding an increasing amount of free sulphur dioxide in a controlled manner during the term of this experiment
- Sample D 20% Al 2 O 3 blended in the contact layers (contact layer with the wine) and 20% CaSO 3 in the middle layer
- the free sulphur dioxide content of the wine was measured by the aspiration method on a weekly basis for 6 weeks .
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Food Science & Technology (AREA)
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2007291956A AU2007291956A1 (en) | 2006-08-30 | 2007-08-30 | Hydrophobic packaging material including a sulphite salt |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006904726A AU2006904726A0 (en) | 2006-08-30 | Packaging films | |
AU2006904726 | 2006-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008025085A1 true WO2008025085A1 (en) | 2008-03-06 |
Family
ID=39135419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2007/001264 WO2008025085A1 (en) | 2006-08-30 | 2007-08-30 | Hydrophobic packaging material including a sulphite salt |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2007291956A1 (en) |
WO (1) | WO2008025085A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012072106A1 (en) * | 2010-11-30 | 2012-06-07 | Foss Analytical A/S | Determination of sulphur dioxide in a liquid |
WO2013093168A1 (en) | 2011-12-21 | 2013-06-27 | Nanobiomatters Research & Development, S. L. | Active nanocomposite materials based on salts generating so2 and edta and method for obtaining same |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1431469A (en) * | 1972-11-28 | 1976-04-07 | Idemitsu Kosan Co | Packaging for perishable foods |
ZA785263B (en) * | 1978-09-15 | 1979-08-29 | M Freiji | A novel means of preserving fruit and vegetables |
US5128060A (en) * | 1990-05-16 | 1992-07-07 | K.K. Ueno Seiyaku Oyo Kenkyujo | Oxygen absorbent |
US6277408B1 (en) * | 1998-02-09 | 2001-08-21 | Southwest Research Institute | Silicate-containing powders providing controlled, sustained gas release |
WO2003028977A1 (en) * | 2001-10-03 | 2003-04-10 | Hekal Ihab M | A film, and method of forming, for in-situ controlled production of so2 gases |
US6607696B1 (en) * | 2000-02-18 | 2003-08-19 | Selective Micro Technologies, Llc | Apparatus and method for controlled delivery of a gas |
US6776998B1 (en) * | 1998-07-14 | 2004-08-17 | Commonwealth Scientific And Industrial Research Organisation | Biocidal packaging system |
-
2007
- 2007-08-30 AU AU2007291956A patent/AU2007291956A1/en not_active Abandoned
- 2007-08-30 WO PCT/AU2007/001264 patent/WO2008025085A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1431469A (en) * | 1972-11-28 | 1976-04-07 | Idemitsu Kosan Co | Packaging for perishable foods |
ZA785263B (en) * | 1978-09-15 | 1979-08-29 | M Freiji | A novel means of preserving fruit and vegetables |
US5128060A (en) * | 1990-05-16 | 1992-07-07 | K.K. Ueno Seiyaku Oyo Kenkyujo | Oxygen absorbent |
US6277408B1 (en) * | 1998-02-09 | 2001-08-21 | Southwest Research Institute | Silicate-containing powders providing controlled, sustained gas release |
US6776998B1 (en) * | 1998-07-14 | 2004-08-17 | Commonwealth Scientific And Industrial Research Organisation | Biocidal packaging system |
US6607696B1 (en) * | 2000-02-18 | 2003-08-19 | Selective Micro Technologies, Llc | Apparatus and method for controlled delivery of a gas |
WO2003028977A1 (en) * | 2001-10-03 | 2003-04-10 | Hekal Ihab M | A film, and method of forming, for in-situ controlled production of so2 gases |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Week 197946, Derwent World Patents Index; Class D14, AN 1979-84140B * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012072106A1 (en) * | 2010-11-30 | 2012-06-07 | Foss Analytical A/S | Determination of sulphur dioxide in a liquid |
US9212993B2 (en) | 2010-11-30 | 2015-12-15 | Foss Analytical A/S | Determination of sulphur dioxide in a liquid |
WO2013093168A1 (en) | 2011-12-21 | 2013-06-27 | Nanobiomatters Research & Development, S. L. | Active nanocomposite materials based on salts generating so2 and edta and method for obtaining same |
Also Published As
Publication number | Publication date |
---|---|
AU2007291956A1 (en) | 2008-03-06 |
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