EP0330431A1 - Verpackungen - Google Patents

Verpackungen Download PDF

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Publication number
EP0330431A1
EP0330431A1 EP89301677A EP89301677A EP0330431A1 EP 0330431 A1 EP0330431 A1 EP 0330431A1 EP 89301677 A EP89301677 A EP 89301677A EP 89301677 A EP89301677 A EP 89301677A EP 0330431 A1 EP0330431 A1 EP 0330431A1
Authority
EP
European Patent Office
Prior art keywords
packaging
packaging material
ceramic powders
paper
film
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.)
Withdrawn
Application number
EP89301677A
Other languages
English (en)
French (fr)
Inventor
John Aprea
Stanley Lewis
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.)
TREBOR SALES Corp
Original Assignee
TREBOR SALES Corp
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 TREBOR SALES Corp filed Critical TREBOR SALES Corp
Publication of EP0330431A1 publication Critical patent/EP0330431A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • 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
    • 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
    • B65D81/00—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
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • 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
    • B65D81/00—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
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
    • B65D81/267—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being in sheet form
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays

Definitions

  • This invention relates to packaging materials and more particularly to packaging materials which assist in increasing the shelf life of products such as vegetables, flowers, meat and the like.
  • packaging material including one or more ceramic powders able to emit long wave infrared radiation.
  • a packaging paper said paper including one or more ceramic powders able to emit long wave infrared radiation.
  • a plastic packaging film including one or more ceramic powders able to emit long wave infrared radiation, said one or more powders extruded within one or more layers of said film.
  • a method of packaging including the step of at least partly containing said produce within packaging material, wherein said packaging material includes one or more ceramic powders able to emit long wave infrared radiation.
  • a method of packaging produce including the step of containing said produce within a package, said package including at least some packaging material which includes one or more ceramic powders able to emit long wave infrared radiation; and creating within said package a controlled atmosphere environment.
  • packaging material which includes ceramic powder able to emit long wave infrared radiation.
  • Such packaging material has application in the packaging of fresh produce and the like and assists in extending the shelf life of the produce.
  • Packaging material according to the present invention includes semi-rigid or flexible packaging material.
  • Produce such as fruit, vegetables, flowers and the like, and meat products are composed of organic compounds including proteins, and also of water.
  • a large percentage of these products may comprise water and protein.
  • a typical composition, at a molecular level, is protein 1 surrounded by a number of layers of water molecules 2.
  • the degradation of produce after harvesting, processing and the like, is due to the decomposition of the protein 2 by bacteria 3.
  • the decomposition is generally caused by bacteria 3 attacking the layers of water 2, and thus penetrating the protein 1, to expose the carbon 4 which is at the core of the protein.
  • the result is often discharges forming in the bottom of a pack or package containing such produce.
  • long wave infrared radiation has the most suitable range of wavelengths for absortion by organic substances, such as water.
  • organic substances such as water.
  • water's peak absorption of infrared radiation occurs at wavelengths of between three and nine microns.
  • the long wave infrared radiation emitted by the packaging material according to the present invention excites the molecules of the produce contained therewithin. This increases the activity of the water molecules bound to proteins 1. The result is an increase in density of water molecules and thus an increase in the natural resistance of the proteins to degradation by bacteria and enzyme growth.
  • the radiation causes the water molecules binding to the meat proteins to achieve a high activity state, thus preventing the bacteria from entering the molecule, or at least slowing down this process.
  • the packaging material according to the present invention is provided with ceramic powders able to emit long wave infrared radiation.
  • ceramic powders when used throughout the specification includes naturally occurring minerals and non-naturally occuring minerals, and combinations of the same (all of which are able to emit long wave infrared radiation).
  • packaging material including non metallic mineral powders in combination with one or more mineral hydrated silicates of aluminium, calcium or sodium are particularly preferred.
  • Ceramic powders which have the characteristic of long wave infrared radiation are: Type A: (Na Al(OH) 2CO 3) hereafter called Dorsonite or Type A Type B: 6 Ca 0 . 6 Si O2 . H 2O AL(OH3) hereafter called Type B
  • the long wave infrared radiation emission efficiencies of Type A and Type B powder when compared to a theoretical black box at 100°C are contained in the graphs in Figure 7.
  • the radiation efficiencies in wavelengths between four and nine microns range from 71% to 91% for Type A powder and range from 73% to 93% for Type B powder.
  • ceramic powders may form molecular seives, which may assist in the removal or discharge of waste products such as hormones, oxygen, ethylene gas and excessive carbon dioxide.
  • combination of one or more suitable ceramic powders into packaging materials may assist in moisture regulation and oxygen level regulation. The result is an extension in the shelf life of the produce packaged in packaging material according to the present invention.
  • meat wrapped in a packaging material of the present invention and lying in contact with such material has a shelf life extended by up to 50%, and retains an appropriate colour for a considerably extended period.
  • the graphs contained in figure 8 demonstrate the gas adsorption properties of Type A and Type B powders for various gases over time.
  • Type A and Type B powders have a comparative surface area of 50-100 square meters per gram which is available for the adsorption of gases.
  • Type A and Type B powders are surprisingly efficient in the adsorption of ethylene gas, H2S, acetaldehyde gas, trimethylamine gas and benzene when measured over time compared to other known compounds.
  • the fundamental building-block of a molecular sieve crystal structure is a tetrahedron of four oxygen anions surrounding a smaller silicon or aluminium cation.
  • the sodium ions or other cations serve to make up the positive charge deficit in the alumina tetrahedra.
  • Each of the four oxygen anions is shared, in turn, with another silica or alumina tetrahedron to extend the crystal lattice in three dimensions.
  • the resulting crystal is unusual in that it is honey-combed with relatively large cavities, each cavity connected with six adjacent ones through apertures or pores.
  • the water of hydration is contained within these cavities.
  • Type A for example, contains roughly spherical cavities approximately eleven angstroms in diameter and about 925 cubic angstroms in volume, that account for almost half of the total crystalline volume. This volume is available for adsorption.
  • the free aperture size in the sodium-bearing type 1 is 3.5 angstroms in diameter. At usual operating temperatures, this allows the passage of molecules with an effective diameter as large as 4 angstroms.
  • the external surface area of the molecular sieve crystal is available for adsorption of molecules of all sizes, whereas the internal area is available only to molecules small enough to enter the pores.
  • the external area is only about 1 per cent of the total surface area. Materials which are too large to be adsorbed internally will commonly be adsorbed externally to the extent of 0.2 to weight per cent.
  • packaging material is provided in the form of a paper.
  • the paper includes one or more of the ceramic powders described.
  • the paper includes appropriate fibrous substances, soaked in a suitable ceramic powder, for example Type A.
  • the paper according to the present invention comprises fibrous material 6 which may be for example plant fibres, synthetic fibres, animal fibres or inorganic fibres.
  • Type A powder 7 is added to the fibrous mixture and there may also be added connector and stabilising agents which are required to form the finished paper. These additives will depend on the requirements of the paper, and its ultimate use.
  • the components required to form the paper are formed into a slurry, and thereafter formed into a suitable paper product, by a suitable method such as for example the method of dry non-woven cloth.
  • a paper-leaf shaped product is formed.
  • the Type A powder 7 is dispersed through the paper 6.
  • the Type A may be sandwiched between layers of the fibrous material.
  • the Type A containing paper may also be coated with a plastic polyethylene material 8 on both sides thereof, as shown in Figure 5 of the accompanying drawings.
  • Type A and 50 parts by weight of pulp material are agitated in 1000 parts of water by volume.
  • solid SBR-Latex is preferably added (3 parts w/v) and one part w/v of sulphuric acid. Thereafter, 0.5 parts (w/v) of tita-gum as a water filtration reagent may be added. The mixture is thereafter stirred or agitated for a further 5 to 10 minutes.
  • Test No 2 The results of Test No 2 as outlined above were obtained by measuring the adsorption efficiency of acetic acid, with the method being conducted in accordance with the weight-volume method in ambient temperature at saturated steam pressure.
  • paper according to the present invention has an increased absorption capability, when compared with previously available papers.
  • Both 30-50 parts (w/v) pulp and 20 parts (w/v) of synthetic fibres are placed in 1000 parts (w/v) of water, and thereafter agitated or stirred.
  • a known paper manufacturing process is thereafter used to form a normal paper with a weight/volume of 80-115g/m .
  • This paper forms a base paper for paper according to the present invention.
  • a slurry is formed containing ingredients substantially as described in Example 1 above, and this slurry is coated onto the base paper.
  • the Type A slurry is absorbed into the base paper.
  • the slurry is such that between 70-115g/m thereof is absorbed on top of the base paper.
  • the final product is thus a paper weight after drying of 150-230g/m.
  • a paper may be provided which includes a foil laminate on one side.
  • This foil may be used for cooking processed meats at between 60° C and 200 °C, and then maintaining freshness during cold or frozen storage.
  • This paper foil may also be used to directionally orientate the wavelength emission of infrared radiation, in one field only.
  • the paper in one form of the invention may be coated with two sides of polyethylene 3. Such a product is particularly suitable for storage of fresh meats and vegetables.
  • the packaging material in this form of the invention may also be provided with perforations therein, which allow for absorption of any moisture within the package, and assists in absorption of gases such as ethylene and carbon dioxide.
  • the packaging paper according to the present invention has application in a large number of uses, including as soaker pads in retail packages of red meat, pork, fish and chicken. A further use is as liner pads for all retail packaged fruits and vegetables. Packaging paper according to the present invention may also be used at a carton liner for bulk shipments of tomatoes, green leaved vegetables, fruit, mushrooms and the like.
  • a further use is as liner pads for bulk fresh meat distribution for a bag in a box type arrangement, or for box in a bag bulk packaging of meats, poultry, fish and the like.
  • Packaging film has particular application to the packaging of leafy plants and vegetables, which naturally respire during transportation and storage. A key factor in prolonging shelf life and appearance of such products is controlling the respiration rate of the fruit and vegetables, as well as establishing an environment which continually eliminates unwanted gases and by-products out of the package.
  • a plastic packaging film according to the present invention is preferably a permeable film, including ceramic powders as defined previously.
  • the combination of the ceramic powders in the plastic packaging film help with the adsorbtion of ethylene gas and also allows oxygen or nitrogen to pass through the film into the package itself.
  • the ceramic powders provided in a film according to the present invention adsorb unwanted gases, or stop adsorbtion when certain levels are reached, thus acting like a filter to control the environment inside the package.
  • the infrared emission of the ceramic powders inhibit enzyme and bacterial activity.
  • the film is sufficiently permeable to allow for proper air permeation and moisture permeation, while at the same time controlling water evaporation so that vegetables, leafy plants and the like, will be maintained in a fresh condition. This also prevents moisture accumulating on the inside of the film.
  • impermeable films which are also be referred to as barrier films.
  • packaging film according to the present invention may be used in conjunction with a controlled atmosphere or environment, to substantially increase the shelf life of products packaged therein.
  • Packaging films according to the present invention may be used with or without paper according to the present invention.
  • a controlled atmosphere is defined as the generation and/or maintenance of a gas or a combination of gases in the package, adapted to enhance the shelf life of the produce. Gases may be injected during packaging and may or may not interact with ceramic powders to create the desired controlled atmosphere.
  • the packaging film is extruded in flexible tubes.
  • Packaging bags and the like may be formed from such film.
  • a packaging film may be provided which includes a 5 layer extruded film, which includes layers of ceramic powders 7.
  • films according to the present invention may include from one to seven layer film extrusions.
  • At least one wall of a cardboard carton which includes an uncoated ceramic powder paper according to the present invention, the ceramic powder paper including one or more ceramic powders.
  • Cardboard cartons are generally made of various layers of paper with "flutes" provided therebetween, to give strength.
  • ceramic powder paper according to the present invention is applied by adhesive to one or more of the inner layers of the cardboard carton.
  • a cardboard carton or container which includes one or more layers of ceramic powder paper. Such a cardboard carton or container allows for an increased shelf life of the product.
  • the carton or container may or may not be used on conjunction with a plastic film and the plastic film may or may not contain ceramic powders according to the present invention.
  • the ceramic powder paper material may be put in any or all of the layers of the corrugation, depending on the application or the degree of either the effect of the ceramic powders required for the specific product application.
  • a visual appearance scale of 1 to 5 was established where on signified excellent visual quality and 5 signified spoiled and visually unappealing.
  • Tests were conducted with strawberries, broccoli and mushrooms.
  • Four Type B powder impregnated bags were filled with strawberries, broccoli and mushrooms respectively and then were sealed in each bag by closing the open end.
  • the same packaging procedure was utilised by placing strawberries, broccoli and mushrooms in conventional polyethylene plastic film of the same thickness as the Type B powder impregnated film to utilise as control.
  • the packages were then stored at 18°- 23°C and visually inspected at two day intervals.
  • Type A paper was laminated to the interior surface of corrugated cardboard cartons and each filled with 1 kilogram of mushrooms. Tests were conducted using conventional non-laminated cardboard cartons filled with mushrooms as a control. Storage temperature was held at 10°C. Mushrooms contained in the Type A paper coated cartons visually spoiled at a rate one half of that of controlled mushrooms.
  • Cuts of beef were placed on a piece of Type A paper and then placed on a stryofoam tray and then overwrapped with commercially available permeable PVC film. Control beef cuts were packaged in the same manner but substituting a commercially available soaker pad instead of Type a paper.
  • the pH of the commercially available soaker pad was 6.0 or neutral, while the pH of the Type A paper ranged between 8.5 to 9.0.
  • Four individual trays of each product were then placed in a flexible non shrink barrier bag with an opening on one end. The barrier bags were then evacuated to remove substantially all the oxygen, and 100% nitrogen gas was then injected into the barrier bags and sealed. After 14 days storage at 2°C the masterpacks were opened.
  • the pork loins as previously packaged achieved a shelf life of 30 days with good surface colour on the meat and no undesirable odours, when compared to packaged used as control which did not use Type B film but were packaged in a similar manner. 6)
  • Diced onions were placed in a permeable plastic bag incorporating Type B powder. The packaged was then evaculated and a gas mixture of 5% O2, 15% CO2, 80% N2 by volume injected into the package and heat sealed.
  • Control product was packaged in the same manner but in a permeable film not incorporating Type B powder. Storage temperature was held at 8°C. Diced onions stored in control bags began deteriorating within 2 days and bags had a strong odour emanating from them almost immediately upon packaging. Onions packaged in Type B powder film did not start deteriorating until day 5 and the bags had little or no odour emanating from them.
  • Packaging film according to the present invention may be formed, in one preferred form of the invention, by any suitable or appropriate technique.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Packages (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
EP89301677A 1988-02-22 1989-02-21 Verpackungen Withdrawn EP0330431A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ223589 1988-02-22
NZ22358988 1988-02-22

Publications (1)

Publication Number Publication Date
EP0330431A1 true EP0330431A1 (de) 1989-08-30

Family

ID=19922374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89301677A Withdrawn EP0330431A1 (de) 1988-02-22 1989-02-21 Verpackungen

Country Status (2)

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EP (1) EP0330431A1 (de)
AU (1) AU3016589A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061682A1 (en) * 2006-11-21 2008-05-29 Domenico Rodeschini Cover element structure for water containers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422183A (en) * 1961-03-22 1969-01-14 Silaco Chem Co Ultra-violet irradiated silver fluoride compositions and biocide uses thereof
JPS63137962A (ja) * 1986-12-01 1988-06-09 Mitsui Toatsu Chem Inc 合成樹脂フイルム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422183A (en) * 1961-03-22 1969-01-14 Silaco Chem Co Ultra-violet irradiated silver fluoride compositions and biocide uses thereof
JPS63137962A (ja) * 1986-12-01 1988-06-09 Mitsui Toatsu Chem Inc 合成樹脂フイルム

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ABSTRACT BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, vol. 55, no. 3, September 1984, abstract no. 3498, Appleton, Wisconsin, US; T. KATSUSHIMA et al.: "Filter paper" *
ABSTRACT BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, vol. 57, no. 6, December 1986, abstract no. 7800, Appleton, Wisconsin, US; S. NAKAMURA: "Paper containing inorganic filter" *
CHEMICAL ABSTRACTS, vol. 109, no. 18, 9th June 1988, page 75, abstract no. 151086c, Columbus, Ohio, US; & JP-A-63 137 962 (MITSUI TOATSU CHEMICALS, INC.) 09-06-1988 *
CHEMICAL ABSTRACTS, vol. 109, no. 20, 9th June 1988, page 66, abstract no 171883p, Columbus, Ohio, US; T. MASUDA et al.: "Infrared ray-emitting polyethylene films for fruit packagings" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061682A1 (en) * 2006-11-21 2008-05-29 Domenico Rodeschini Cover element structure for water containers

Also Published As

Publication number Publication date
AU3016589A (en) 1989-08-24

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