WO2001032514A1 - Bottle for light-sensitive dairy products - Google Patents

Bottle for light-sensitive dairy products Download PDF

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Publication number
WO2001032514A1
WO2001032514A1 PCT/NL2000/000800 NL0000800W WO0132514A1 WO 2001032514 A1 WO2001032514 A1 WO 2001032514A1 NL 0000800 W NL0000800 W NL 0000800W WO 0132514 A1 WO0132514 A1 WO 0132514A1
Authority
WO
WIPO (PCT)
Prior art keywords
bottle
light
transmission
wavelength
wall
Prior art date
Application number
PCT/NL2000/000800
Other languages
French (fr)
Inventor
Jan Jozef André ARNAUT
Peter Raymond Philip Goeman
Yves Luc René VERBURGH
Original Assignee
Campina Melkunie B.V.
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
Priority claimed from NL1013488A external-priority patent/NL1013488C2/en
Priority claimed from NL1013898A external-priority patent/NL1013898C1/en
Application filed by Campina Melkunie B.V. filed Critical Campina Melkunie B.V.
Priority to EP00980100A priority Critical patent/EP1232096A1/en
Priority to AU17401/01A priority patent/AU1740101A/en
Publication of WO2001032514A1 publication Critical patent/WO2001032514A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D81/00Containers, 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
    • B65D81/24Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/30Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants by excluding light or other outside radiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D1/00Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D81/00Containers, 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
    • B65D81/18Containers, 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 providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20Containers, 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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2069Containers, 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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere
    • B65D81/2076Containers, 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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere in an at least partially rigid container

Definitions

  • the present invention relates to a bottle made of plastic for a sterilized dairy product.
  • plastic bottles including so-called PP, polycarbonate, PE and PET bottles. These bottles are used for various applications and are suitable, inter alia, for holding beverages, including dairy products.
  • WO-A-97/30122 discloses a plastic bottle for beverages whose gas-tightness and resistance to leaching of chemical compounds from the wall into the contents of the bottle is enhanced by the incorporation of cyclodextrins into the wall.
  • the wall of this bottle is not lightproof.
  • NL-A-8104678 teaches a container whose wall consists of a plurality of layers of the same polymer, PE being the only example mentioned.
  • This container is lightproof and suitable for packaging sterilized milk, inter alia.
  • the wall is permeable to gases.
  • a major problem with packaged sterilized dairy products is the considerable sensitivity of these sterilized dairy products to external influences such as bacterial contamination, light, oxygen etc.
  • the dairy product should be suitably protected by the container both against UV radiation and visible light.
  • This radiation particularly the radiation of a wavelength shorter than 500 nm, causes chemical degradation of, inter alia, vitamin B2, reaction products (free radicals) being formed in the process which in turn can react with other constituents within the dairy product. This produces the so-called light-induced off-flavour.
  • the shelf life of the dairy product is also reduced -thereby.
  • the invention provides a bottle made of plastic having a transparent, substantially oxygen-tight wall, said bottle enclosing a sterilized dairy product, the wall of the bottle having the following properties: substantially no transmission of light of a wavelength shorter than 350 run, - less than 30% transmission of light of a wavelength of from 350 to 450 nm,
  • a bottle according to the invention allows sterilized dairy products to be kept therein at room temperature for a very long time.
  • US-A-4535901 discloses a transparent plastic bottle having good oxygen barrier properties and UV barrier properties, but the specific light transmission characteristics as pertain to the bottle according to the invention are not disclosed, nor is there any mention of the bottle being used to hold sterilized dairy products.
  • GB-A-2086342 discloses a bottle made of plastic for sterilized milk.
  • This bottle comprises two layers, the first layer screening out light of a wavelength greater than or equal to 800 nm, and the second layer screening out light of a wavelength of less than 800 nm. In other words, this bottle is therefore not transparent.
  • completely transparent is meant to indicate that the wall of the bottle will therefore have substantially perfect image transmitivity .
  • the wall may have a colour, but the contents can at all times be perceived in focus.
  • bottles having different colours can be fabricated, ranging from green, yellow-green, orange, orange-red to red. Preference is given to yellow-green and orange-red bottles .
  • the wall of the bottle has the property: 40% or more, preferably 50% or more transmission of light of a wavelength of 450-650 nm.
  • the wall of the bottle has the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, - less than 30% transmission of light of a wavelength of from 350 to 500 nm, substantially complete transmission of light of a wavelength of 500-650 nm.
  • the wall of the bottle has the property: 40% or more, preferably 50% or more transmission of light of a wavelength of 500-650 nm.
  • the wall of the bottle at least comprises polyethylene terephthalate (PET) .
  • PET polyethylene terephthalate
  • PET has better wear resistance and higher breaking strength. Consequently, PET is more suitable as a material for refillable bottles.
  • a thread on the bottle for the purpose of fastening eg. a cap can be defined much more precisely than in the case of PE.
  • gas-tightness at the cap and resealability of the bottle can be ensured more effectively without additional measures being taken.
  • PET has a classier appearance, which comes very close to that of glass, so that PET is more suitable for so-called "premium quality products".
  • sterilized milk Apart from sterilized milk (beverages), sterilized dairy products also include sterilized yoghurt (beverages) , cream, coffee cream etc.
  • sterilized dairy product refers to a commercial sterile dairy product which can be obtained, for example, via the so-called UHT process.
  • Other conceivable ways of sterilizing dairy products are high-pressure sterilization, irradiation, electropulse sterilization, microfiltration etc.
  • a bottle is any bottle suitable for holding a sterilized dairy product.
  • the shape can vary from a standard milk bottle to a milk carton, nor are smaller packaging types such as small beverage bottles and beverage cartons excluded.
  • the bottle according to the invention can comprise any suitable seal ranging from caps to rupturable membranes .
  • the bottle according to the invention can comprise a single- or multilayer wall.
  • the wall of the bottle successively comprises a layer of PET, a layer made of EVOH and PA, and a layer of PET.
  • This combination of layers provides an excellent possibility of fabricating a bottle according to the invention which is transparent and oxygen-tight and additionally has the desired transmission properties.
  • suitable materials having light barrier and oxygen barrier characteristics can be incorporated into the material of the wall or be laminated thereonto.
  • the materials having light barrier and oxygen barrier characteristics are incorporated in the plastic of the wall of the bottle.
  • the plastic material of the wall of the bottle can be admixed with suitable colorants.
  • the oxygen barrier characteristics are obtained, for example, by the wall of the bottle having ethylvinyl alcohol
  • EVOH ethylene glycol
  • PA polyamide
  • PVDC poly (vinylidene) chloride
  • the bottle is filled with the sterilized dairy product by means of an aseptic bottling method. Any bacterial contamination can thus be avoided.
  • the air in the void space of the bottle is replaced by a gas which is inert with respect to the dairy product, for example sterilized nitrogen, Ar, C0 2 , He, N 2 0 (nitrous oxide), S0 2 or mixtures of these.
  • a gas which is inert with respect to the dairy product for example sterilized nitrogen, Ar, C0 2 , He, N 2 0 (nitrous oxide), S0 2 or mixtures of these.
  • the bottle comprises a substance that is able to scavenge oxygen from the bottle ("oxygen scavenger") and can also be used with foodstuffs.
  • oxygen scavenger a substance that is able to scavenge oxygen from the bottle
  • This substance can be chosen, for example, from an alkali metal sulphite, eg. sodium sulphite, an alkali metal ascorbate, eg. sodium ascorbate, or metal ions in such an oxidation state that they can react with oxygen, or mixtures of these substances.
  • the location of the oxygen scavenger in the bottle is not critical. Advantageously, however, it is present in the headspace of the bottle. If the bottle comprises a cap or similar closure means, the oxygen scavenger can be attached thereto or be incorporated therein.
  • the bottle comprises a seal.
  • a seal provides quality assurance, as the user in that case is at all times able to ascertain whether the bottle has already been opened.
  • the seal which, for example, can comprise a rupture ring for the cap, but can equally comprise a sealing strip glued to the cap and the bottle.
  • the rupture edge on the cap is a so- called d-strip. This permits very effective cleaning of the bottle, with a smaller risk of rinse water and chemical and/or bacterial contamination's remaining behind at the rupture edge, this being in contrast to the so-called J-strip.
  • the sterilized dairy product is sterilized milk.
  • the properties of the bottle according to the invention are of essential importance.
  • the invention further provides a bottle made of plastic having a transparent, substantially oxygen-tight wall, the wall of the bottle having the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, - less than 30% transmission of light of a wavelength of from 350 to 450 nm,
  • the wall of the bottle has the property: 40% or more, preferably 50% or more transmission of light of a wavelength of 450-650 nm.
  • the bottle according to the invention has the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, less than 30% transmission of light of a wavelength of from 350 to 500 nm,
  • the wall of the bottle has the property:
  • the bottle is designed for holding a sterilized dairy product, preferably a sterilized dairy product.
  • the invention will be explained below in more detail with reference to an example.
  • a bottle was fabricated as shown in Figure 1, by injection moulding a parison, followed by blow moulding.
  • the bottle wall is composed of multilayer material comprising an inner layer of PET (thickness approximately 120 ⁇ m) , a core layer of polyamide (thickness approximately 60 ⁇ m) and an outer layer of PET (thickness approximately 120 ⁇ m) .
  • the barrier core layer can also consist of EVOH.
  • a mixture of colorants was added to both PET layers. The option of restricting the colorant or the mixture of colorants to one PET layer or possibly to the barrier core layer is not excluded.
  • the bottle had a transmission spectrum as shown in
  • 1 denotes the bottle which is fabricated from PET/PA/PET as stated in the example.
  • the bottle 1 is filled with sterilized milk 2.
  • Another example of a suitable multilayer material for fabrication of a bottle 1 according to the invention comprises an inner layer of PET, an interlayer of PET or polyamide with colorants, a core layer of PET, an interlayer of polyamide and an outer layer of PET including colorants. All the layers in this structure have a thickness of 60 ⁇ m. The option of all the PET layers containing colorants is not excluded, the important point being that the transmission spectrum of the bottle wall is comparable with the spectrum according to the invention.
  • the void space 3 in the bottle is mainly filled with sterilized nitrogen.
  • 4 denotes a cap, and 5 denotes a seal.
  • This seal 5 comprises a plastic sealing membrane which seals the outlet orifice 6 of the bottle 1 underneath the cap 4. Prior to initial use, the membrane needs to be perforated or removed.
  • the membrane On its side facing the milk, the membrane comprises a thin layer of sodium ascorbate which is able to scavenge any remaining oxygen from the headspace of the bottle. Equally, it will scavenge oxygen entering the headspace from the milk while the bottle is stored.

Abstract

Bottle made of plastic having a transparent, substantially oxygen-tight wall, said bottle enclosing a sterilized dairy product, the wall of the bottle having the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, less than 30 % transmission of light of a wavelength of from 350 to 450 nm, 30 % or more transmission of light of a wavelength of 450 - 650 nm. The dairy product has a very long shelf life at room temperature, taste and nutritional value being all but maintained.

Description

BOTTLEFORLIGHT-SENSITIVEDAIRYPRODUCTS
The present invention relates to a bottle made of plastic for a sterilized dairy product.
In the prior art, many types of plastic bottles are known, including so-called PP, polycarbonate, PE and PET bottles. These bottles are used for various applications and are suitable, inter alia, for holding beverages, including dairy products.
For example, WO-A-97/30122 discloses a plastic bottle for beverages whose gas-tightness and resistance to leaching of chemical compounds from the wall into the contents of the bottle is enhanced by the incorporation of cyclodextrins into the wall.
The wall of this bottle is not lightproof.
Furthermore, NL-A-8104678 teaches a container whose wall consists of a plurality of layers of the same polymer, PE being the only example mentioned. This container is lightproof and suitable for packaging sterilized milk, inter alia. In this bottle, the wall is permeable to gases.
Finally, "Canning + Filling" of April 1999, pp. 43-46 reports the idea of aseptically bottling "extended shelf-life" milk into PET bottles. It is stated that in that case materials having a UV- and oxygen-barrier effect should be incorporated into the PET material. No examples are mentioned, nor is anything said about barrier characteristics with respect to visible light. It is noted in this context that "extended shelf- life" milk is milk which should be stored under refrigeration and will keep there for at most one month. This does not, therefore, relate to sterilized milk.
A major problem with packaged sterilized dairy products is the considerable sensitivity of these sterilized dairy products to external influences such as bacterial contamination, light, oxygen etc. Given the desired long storage time without refrigeration, generally up to rather more than 6 months, the dairy product should be suitably protected by the container both against UV radiation and visible light. This radiation, particularly the radiation of a wavelength shorter than 500 nm, causes chemical degradation of, inter alia, vitamin B2, reaction products (free radicals) being formed in the process which in turn can react with other constituents within the dairy product. This produces the so-called light-induced off-flavour. The shelf life of the dairy product is also reduced -thereby.
It is an object of the present invention to provide a solution to the abovementioned problem and to provide a generally improved bottle of the type specified in the introduction. The invention provides a bottle made of plastic having a transparent, substantially oxygen-tight wall, said bottle enclosing a sterilized dairy product, the wall of the bottle having the following properties: substantially no transmission of light of a wavelength shorter than 350 run, - less than 30% transmission of light of a wavelength of from 350 to 450 nm,
30% or more transmission of light of a wavelength of 450- 650 nm.
A bottle according to the invention allows sterilized dairy products to be kept therein at room temperature for a very long time.
Per se, US-A-4535901 discloses a transparent plastic bottle having good oxygen barrier properties and UV barrier properties, but the specific light transmission characteristics as pertain to the bottle according to the invention are not disclosed, nor is there any mention of the bottle being used to hold sterilized dairy products.
In addition, GB-A-2086342 discloses a bottle made of plastic for sterilized milk. This bottle comprises two layers, the first layer screening out light of a wavelength greater than or equal to 800 nm, and the second layer screening out light of a wavelength of less than 800 nm. In other words, this bottle is therefore not transparent.
It has been found that transparency is an important requirement for bottles in which dairy products are present, so that the user is able to get a good view of the product from outside.
In the context of the present invention, "completely transparent" is meant to indicate that the wall of the bottle will therefore have substantially perfect image transmitivity . In other words, the wall may have a colour, but the contents can at all times be perceived in focus.
According to the invention, bottles having different colours can be fabricated, ranging from green, yellow-green, orange, orange-red to red. Preference is given to yellow-green and orange-red bottles .
In particular, the wall of the bottle has the property: 40% or more, preferably 50% or more transmission of light of a wavelength of 450-650 nm.
Advantageously, the wall of the bottle has the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, - less than 30% transmission of light of a wavelength of from 350 to 500 nm, substantially complete transmission of light of a wavelength of 500-650 nm.
Preference is given to yellow-green and orange-red bottles.
In particular, the wall of the bottle has the property: 40% or more, preferably 50% or more transmission of light of a wavelength of 500-650 nm.
Fabrication of a transparent plastic bottle is possible with many materials such as eg. PP containing a so-called "clarifying agent". Preferably, however, the wall of the bottle at least comprises polyethylene terephthalate (PET) . Compared with the use of other plastics such as eg. PE, the use of PET for bottles for sterilized dairy products offers many advantages apart from transparency:
PET has better wear resistance and higher breaking strength. Consequently, PET is more suitable as a material for refillable bottles.
In the case of PET, a thread on the bottle for the purpose of fastening eg. a cap can be defined much more precisely than in the case of PE. Thus gas-tightness at the cap and resealability of the bottle can be ensured more effectively without additional measures being taken. PET has a classier appearance, which comes very close to that of glass, so that PET is more suitable for so-called "premium quality products".
For convenience's sake, the following will refer solely to sterilized milk, although it will be obvious that the invention is by no means limited thereto. Apart from sterilized milk (beverages), sterilized dairy products also include sterilized yoghurt (beverages) , cream, coffee cream etc.
The term "sterilized dairy product" refers to a commercial sterile dairy product which can be obtained, for example, via the so-called UHT process. Other conceivable ways of sterilizing dairy products are high-pressure sterilization, irradiation, electropulse sterilization, microfiltration etc.
For the purpose of the present invention, a bottle is any bottle suitable for holding a sterilized dairy product. In other words, neither the shape nor the dimensions of the bottle are essential. The shape can vary from a standard milk bottle to a milk carton, nor are smaller packaging types such as small beverage bottles and beverage cartons excluded. Moreover, the bottle according to the invention can comprise any suitable seal ranging from caps to rupturable membranes .
The bottle according to the invention can comprise a single- or multilayer wall. Preferably, the wall of the bottle successively comprises a layer of PET, a layer made of EVOH and PA, and a layer of PET. This combination of layers provides an excellent possibility of fabricating a bottle according to the invention which is transparent and oxygen-tight and additionally has the desired transmission properties. In order to impart light barrier and oxygen barrier characteristics to the wall of the bottle according to the invention, suitable materials having light barrier and oxygen barrier characteristics can be incorporated into the material of the wall or be laminated thereonto. Advantageously, however, the materials having light barrier and oxygen barrier characteristics are incorporated in the plastic of the wall of the bottle. In order to confer the required light transmission properties to the bottle, the plastic material of the wall of the bottle can be admixed with suitable colorants.
The oxygen barrier characteristics are obtained, for example, by the wall of the bottle having ethylvinyl alcohol
(EVOH), polyamide (PA) or poly (vinylidene) chloride (PVDC) incorporated thereinto as a material having oxygen barrier characteristics .
Preferably, the bottle is filled with the sterilized dairy product by means of an aseptic bottling method. Any bacterial contamination can thus be avoided.
Advantageously, the air in the void space of the bottle is replaced by a gas which is inert with respect to the dairy product, for example sterilized nitrogen, Ar, C02, He, N20 (nitrous oxide), S02 or mixtures of these. Thus oxygen from the void space in the bottle is prevented from penetrating the sterilized dairy product and adversely affecting it.
Advantageously, the bottle comprises a substance that is able to scavenge oxygen from the bottle ("oxygen scavenger") and can also be used with foodstuffs. Thus, any remaining oxygen is removed from the void space in the bottle and indirectly also from the dairy product itself. This substance can be chosen, for example, from an alkali metal sulphite, eg. sodium sulphite, an alkali metal ascorbate, eg. sodium ascorbate, or metal ions in such an oxidation state that they can react with oxygen, or mixtures of these substances.
The location of the oxygen scavenger in the bottle is not critical. Advantageously, however, it is present in the headspace of the bottle. If the bottle comprises a cap or similar closure means, the oxygen scavenger can be attached thereto or be incorporated therein.
In a specific embodiment, the bottle comprises a seal. A seal provides quality assurance, as the user in that case is at all times able to ascertain whether the bottle has already been opened. There are no particular limitations to the seal which, for example, can comprise a rupture ring for the cap, but can equally comprise a sealing strip glued to the cap and the bottle. Advantageously, the rupture edge on the cap is a so- called d-strip. This permits very effective cleaning of the bottle, with a smaller risk of rinse water and chemical and/or bacterial contamination's remaining behind at the rupture edge, this being in contrast to the so-called J-strip.
Particularly preferably, the sterilized dairy product is sterilized milk. Particularly in the case of sterilized milk, the properties of the bottle according to the invention are of essential importance. The invention further provides a bottle made of plastic having a transparent, substantially oxygen-tight wall, the wall of the bottle having the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, - less than 30% transmission of light of a wavelength of from 350 to 450 nm,
30% or more transmission of light of a wavelength of 450- 650 nm.
In particular, the wall of the bottle has the property: 40% or more, preferably 50% or more transmission of light of a wavelength of 450-650 nm.
Preferably, the bottle according to the invention has the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, less than 30% transmission of light of a wavelength of from 350 to 500 nm,
30% or more transmission of light of a wavelength of 500- 650 nm. In particular, the wall of the bottle has the property:
40% or more, preferably 50% or more transmission of light of a wavelength of 500-650 nm.
In particular, the bottle is designed for holding a sterilized dairy product, preferably a sterilized dairy product. The invention will be explained below in more detail with reference to an example. A bottle was fabricated as shown in Figure 1, by injection moulding a parison, followed by blow moulding. The bottle wall is composed of multilayer material comprising an inner layer of PET (thickness approximately 120 μm) , a core layer of polyamide (thickness approximately 60 μm) and an outer layer of PET (thickness approximately 120 μm) . The barrier core layer can also consist of EVOH. To obtain the desired transmission properties, a mixture of colorants was added to both PET layers. The option of restricting the colorant or the mixture of colorants to one PET layer or possibly to the barrier core layer is not excluded. The bottle had a transmission spectrum as shown in
Figure 2 and a green-yellow colour.
In the figure, 1 denotes the bottle which is fabricated from PET/PA/PET as stated in the example. The bottle 1 is filled with sterilized milk 2. Another example of a suitable multilayer material for fabrication of a bottle 1 according to the invention comprises an inner layer of PET, an interlayer of PET or polyamide with colorants, a core layer of PET, an interlayer of polyamide and an outer layer of PET including colorants. All the layers in this structure have a thickness of 60 μm. The option of all the PET layers containing colorants is not excluded, the important point being that the transmission spectrum of the bottle wall is comparable with the spectrum according to the invention.
The void space 3 in the bottle is mainly filled with sterilized nitrogen. 4 denotes a cap, and 5 denotes a seal. This seal 5 comprises a plastic sealing membrane which seals the outlet orifice 6 of the bottle 1 underneath the cap 4. Prior to initial use, the membrane needs to be perforated or removed.
On its side facing the milk, the membrane comprises a thin layer of sodium ascorbate which is able to scavenge any remaining oxygen from the headspace of the bottle. Equally, it will scavenge oxygen entering the headspace from the milk while the bottle is stored.

Claims

1. Bottle made of plastic having a transparent, substantially oxygen-tight wall, said bottle enclosing a sterilized dairy product, the wall of the bottle having the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, less than 30% transmission of light of a wavelength of from 350 to 450 nm, - 30% or more transmission of light of a wavelength of 450- 650 nm.
2. Bottle according to claim 1, characterized in that the wall of the bottle has the following properties: substantially no transmission of light of a wavelength shorter than 350 nm, less than 30% transmission of light of a wavelength of from 350 to 500 nm,
30% or more transmission of light of a wavelength of 500- 650 nm.
3. Bottle according to claim 1 or 2, characterized in that the wall of the bottle at least comprises polyethylene terephthalate (PET) .
4. Bottle according to claim 3, characterized in that the wall of the bottle successively comprises a layer of PET, a layer made of EVOH and PA, and a layer of PET.
5. Bottle according to one or more of the preceding claims, characterized in that the void space (3) of the bottle (1) holds a gas which is inert with respect to dairy products (2) .
6. Bottle according to one or more of the preceding claims, characterized in that bottle (1) on its inside comprises a substance which is able to scavenge oxygen from the bottle (1) .
7. Bottle according to claim 6, characterized in that the substance which is able to scavenge oxygen from the bottle (1) is selected from an alkali metal sulphite, an alkali metal ascorbate, (metal ions) or mixtures thereof.
8. Bottle according to one or more of the preceding claims, characterized in that the bottle (1) comprises a seal (5) .
9. Bottle according to one or more of the preceding claims, characterized in that the sterilized dairy product is sterilized milk.
10. Bottle made of plastic having a transparent, substantially oxygen-tight wall, the wall of the bottle having the following properties : substantially no transmission of light of a wavelength shorter than 350 nm, less than 30% transmission of light of a wavelength of from 350 to 450 m,
30% or more transmission of light of a wavelength of 450- 650 nm.
11. Bottle according to claim 10, characterized in that the wall of the bottle has the following properties: - substantially no transmission of light of a wavelength shorter than 350 nm, less than 30% transmission of light of a wavelength of from
350 to 500 nm,
30% or more transmission of light of a wavelength of 500- 650 nm.
PCT/NL2000/000800 1999-11-04 2000-11-03 Bottle for light-sensitive dairy products WO2001032514A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00980100A EP1232096A1 (en) 1999-11-04 2000-11-03 Bottle for light sensitive dairy products
AU17401/01A AU1740101A (en) 1999-11-04 2000-11-03 Bottle for light-sensitive dairy products

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL1013488 1999-11-04
NL1013488A NL1013488C2 (en) 1999-11-04 1999-11-04 Plastic bottle for sterilized dairy product having transparent, oxygen-tight wall with no transmission of light of specified wavelength
NL1013898A NL1013898C1 (en) 1999-12-21 1999-12-21 Plastic bottle for sterilized dairy product having transparent, oxygen-tight wall with no transmission of light of specified wavelength
NL1013898 1999-12-21

Publications (1)

Publication Number Publication Date
WO2001032514A1 true WO2001032514A1 (en) 2001-05-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2000/000800 WO2001032514A1 (en) 1999-11-04 2000-11-03 Bottle for light-sensitive dairy products

Country Status (3)

Country Link
EP (1) EP1232096A1 (en)
AU (1) AU1740101A (en)
WO (1) WO2001032514A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1273525A1 (en) * 2001-06-29 2003-01-08 Société des Produits Nestlé S.A. An assembly containing sweetened condensed milk
EP1950173A1 (en) * 2007-01-26 2008-07-30 Asteas S.r.L. Closure for containers such as bottles and the like and method of carrying it out
EP1964790A1 (en) * 2005-11-21 2008-09-03 Meiji Dairies Corporation Milk drink/food packed in transparent container and method of producing the same
US7544405B2 (en) 2004-04-15 2009-06-09 Tergal Industries Packaging shaped articles, e.g., opaque bottles, and process for the manufacture thereof
WO2011054839A3 (en) * 2009-11-03 2011-09-15 Carlsberg Breweries A/S Preventing the generation of mbt in a hops based beverage
WO2011054838A3 (en) * 2009-11-03 2011-10-27 Carlsberg Breweries A/S Eliminating the generation of mbt in a hops based beverage
WO2016139578A1 (en) * 2015-03-02 2016-09-09 Nestec S.A. Visible light barrier for dairy packaging
US20220312802A1 (en) * 2021-03-24 2022-10-06 David Murray Melrose Containers for liquid beverages and methods of forming and processing these containers

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1273525A1 (en) * 2001-06-29 2003-01-08 Société des Produits Nestlé S.A. An assembly containing sweetened condensed milk
WO2003002417A1 (en) * 2001-06-29 2003-01-09 Societe Des Produits Nestle S.A. An assembly containing sweetened condensed milk
US7544405B2 (en) 2004-04-15 2009-06-09 Tergal Industries Packaging shaped articles, e.g., opaque bottles, and process for the manufacture thereof
EP1964790A1 (en) * 2005-11-21 2008-09-03 Meiji Dairies Corporation Milk drink/food packed in transparent container and method of producing the same
EP1964790B1 (en) 2005-11-21 2015-06-24 Meiji Co., Ltd. Milk drink/food packed in transparent container and method of producing the same
EP1964790A4 (en) * 2005-11-21 2013-07-10 Meiji Co Ltd Milk drink/food packed in transparent container and method of producing the same
EP1950173A1 (en) * 2007-01-26 2008-07-30 Asteas S.r.L. Closure for containers such as bottles and the like and method of carrying it out
CN102695654A (en) * 2009-11-03 2012-09-26 嘉士伯酿酒有限公司 Eliminating the generation of MBT in a hops based beverage
CN102695653A (en) * 2009-11-03 2012-09-26 嘉士伯酿酒有限公司 Preventing the generation of MBT in a hops based beverage
WO2011054838A3 (en) * 2009-11-03 2011-10-27 Carlsberg Breweries A/S Eliminating the generation of mbt in a hops based beverage
WO2011054839A3 (en) * 2009-11-03 2011-09-15 Carlsberg Breweries A/S Preventing the generation of mbt in a hops based beverage
EA023352B1 (en) * 2009-11-03 2016-05-31 Карлсберг Брюириз А/С Eliminating the generation of 3-methylbut-2-ene-1-thiol (mbt) in a hops based beverage
EA026710B1 (en) * 2009-11-03 2017-05-31 Карлсберг Брюириз А/С Preventing the generation of 3-methylbut-2-ene-1-thiol (mbt) in a hops based beverage
WO2016139578A1 (en) * 2015-03-02 2016-09-09 Nestec S.A. Visible light barrier for dairy packaging
CN107428439A (en) * 2015-03-02 2017-12-01 雀巢产品技术援助有限公司 Visible ray barriers for dairy products packaging
US10822153B2 (en) 2015-03-02 2020-11-03 Societe Des Produits Nestle S.A. Visible light barrier for dairy packaging
US20220312802A1 (en) * 2021-03-24 2022-10-06 David Murray Melrose Containers for liquid beverages and methods of forming and processing these containers

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