EP1451079A1 - Package for a water-soluble capsule - Google Patents

Package for a water-soluble capsule

Info

Publication number
EP1451079A1
EP1451079A1 EP02804168A EP02804168A EP1451079A1 EP 1451079 A1 EP1451079 A1 EP 1451079A1 EP 02804168 A EP02804168 A EP 02804168A EP 02804168 A EP02804168 A EP 02804168A EP 1451079 A1 EP1451079 A1 EP 1451079A1
Authority
EP
European Patent Office
Prior art keywords
package
combination according
day
base
water
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Withdrawn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
EP02804168A
Other languages
German (de)
French (fr)
Inventor
Andrew John Lever Faberge Europe Cole
Claire Unilever Research Port Sunlight Robins
Rahul Dominic Lever Faberge Europe Vas-Bhat
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.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
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 Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP1451079A1 publication Critical patent/EP1451079A1/en
Withdrawn legal-status Critical Current

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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/042—Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions

Definitions

  • the present invention relates to a package or container for one or more water-soluble capsules containing a detergent composition.
  • Detergent compositions for machine washing of laundry are provided in many forms such as free-flowing powders, liquids. Detergents in the form of compressed powder tablets are also commonly available.
  • Tablets have several advantages over free-flowing powdered products and these are well documented, in particular, as they do not require measuring they are thus easier to handle and dispense into the wash load and allow for accurate dosing of detergent .
  • Water-soluble capsules generally comprise a detergent composition encapsulated with water-soluble film, such as polyvinyl alcohol. Encapsulation allows for handling without direct contact with the detergent composition. This is especially advantageous when the detergent composition includes aggressive cleaning components which would irritate the skin on direct contact .
  • a further advantage of water-soluble capsules is that this allows discretising of other types of detergent e.g. liquid. Liquid is far more readily dissolvable than compressed powder and so not prone to the dissolution problems encountered with tablets formed in this way.
  • water-soluble capsules a problem encountered with water-soluble capsules is that the water soluble film material is vulnerable to increased levels of ambient humidity during storage and this can lead to premature dissolution of the film and as a result the capsule may rupture and release it contents.
  • Another problem is that if, during storage, the film of the water soluble capsule becomes damp, it may then increase the possibility of in-wash lodging as a tacky film is more likely to stick to the washing machine door before it has chance to be caught up in the main wash.
  • the invention provides one or more water-soluble capsules containing a detergent composition in combination with a package containing said one or more water-soluble capsules, characterised in that the package is formed from a material which has a Moisture
  • Vapour Transfer Rate (M.V.T.R) of between 0.25 g/m /day to
  • the water soluble capsules can be protected from ambient humidity during storage, by a simplified packaging.
  • a further problem is that many existing packages are unsuitable for encapsulated detergent - as they are designed for powders (e.g. boxes/bags from which powder is scooped) or liquids (bottles/refill bags from which the liquid is poured) or boxes in which tablets are stacked.
  • Such packaging does not capitalise on such characteristics of water-soluble film encapsulated detergent such as the possibility of direct handling.
  • the package is self-standing by means of a collapsible base portion which expands from a collapsed position to an expanded position when one or more capsules is/are placed on the base, and is collapsible when empty so as to make the package substantially flat.
  • the amount of plastic packaging material disposed in the environment can be substantially decreased as there is no need to also provide a separate support structure to allow the package to stand upright.
  • the provision of a self-standing package is particularly advantageous when used with encapsulated detergent, as the capsules can be conveniently retrieved by reaching into the standing package, even when there is only a single capsule remaining therein.
  • the package is formed as a single-walled body.
  • single-walled should be construed as meaning that at any point the is only one wall thick. It includes a body comprising one or more walls which have a laminate structure .
  • FIG. 1 is a perspective view of a sealed package containing a round-shaped water-soluble capsule of liquid detergent, according to the invention
  • Figure 2 is a front view of the package of Figure 1, shown empty;
  • Figure 3 is a plan view of the package of Figure 1, viewed from the base;
  • Figure 4 is a perspective view of another embodiment of the invention.
  • Figure 5 is a front view of the package of figure 4.
  • Figure 6 is a plan view of the package of Figure 4, viewed from the base;
  • Figure 7 is a side view of the package of figure 4.
  • the packaging system of the invention is intended to consist of a consumer unit containing the detergent composition of the invention and designed to be used/stored as such in the consumer homes .
  • the units shown are bags/pouches and can be made either from raw stock or from preformed and/or prefolded sheet material, and can be sealed by various means, e.g. by heat, adhesives/glue, tapes.
  • the bags/pouches herein are made of films, either monolayer, including coextruded materials, or laminated; such films are typically paper or plastic or combinations of the two; preferred materials for the bags herein are plastic and/or paper laminates.
  • Plastic, materials are typically polyolefines, and both plastic and paper can be virgin or recycled material; the films herein can be printed in different ways, typically gravure, flexo, offset .
  • films with moisture barrier properties obtained by resins, either coextruded or in different laminated layers, or coating by e.g. lacquers.
  • One combination of the invention is shown, comprising a plastic bag 1 which contains one or more water soluble capsules 3 (only one shown) of detergent liquid.
  • shaped water-soluble capsules may be used e.g. round, as shown in figures 1, 3 and 4 or rectangular (sometimes referred to as ⁇ pillow-shaped' ) as shown in figure 5.
  • the plastic bag 1 is constructed from a laminar material comprising two layers: an outer layer of polyester (PET) which is 12 microns thick and an inner layer of low linear density polyethylene (LLDPE) 150 microns thick.
  • PET polyester
  • LLDPE low linear density polyethylene
  • the bag has two rectangular side walls 2, 4 which are heat (or glue) -sealed together along corresponding longitudinal edges and which is closed at one end (the base portion 17) by a base wall 6 and at the other end (the upper portion 18) by 20, 22 seals both which are described below in greater detail .
  • a base wall 6 which is formed from a rectangular sheet of plastic, perimeter portions of which are heat (or glue) -sealed to respective edges portions of the end portions 8, 10 of the side walls 2,4.
  • the sealing portion 12 i.e. the part forming the seal with the base wall 6) is shaped such that the effective base area 16 is very generally elliptical (as shown more clearly in figure 3) .
  • a resealable closure member 20 which comprises a plastic zip 20 having corresponding engagement portions fixed on respective side walls 2,4, internally of the bag 1.
  • the package further includes a permanent heat or glue seal 22 in the uppermost portion 18a.
  • a permanent heat or glue seal 22 in the uppermost portion 18a.
  • the bag 1 can then be opened and sealed/resealed repeatedly by use of the zip 20.
  • the bag 1 is self-standing on a substantially flat surface shown generally at 14, (and which could be for example a shelf, work top etc.,) when one or more capsules is/are placed on the base portion: the weight of the capsule acts downward on the base wall which thereby expands laterally to support the capsule and as a result the package is disposed in an upright position.
  • the construction as described above allows the bag to be formed one wall thick but self-standing and without a supporting structure such as a box.
  • the laminar material comprises two layers: an outer layer of polyester (PET) which is 12 microns thick and an inner layer of low linear density polyethylen (LLDPE) 180 microns thick.
  • PET polyester
  • LLDPE low linear density polyethylen
  • This increased thickness of the LLDPE layer provides a reduced MVTR and additional stability for larger packs (e.g. where say 20 -30 or more capsules are packaged) .
  • FIG. 4-7 A further embodiment is shown in figures 4-7.
  • This bag is structure as for the package above except that it has outwardly curved sides which provide extra volume.
  • the bag may have an increased outer curvature at the base so as to lower the centre of gravity of the package when one or more capsules, are contained so providing a more stable package.
  • the package of figures 4-7 may comprise any suitable material, such as that in the embodiment shown in figures 1-3.
  • the detergent liquid contained in the water soluble capsules exemplified here comprises:
  • capsules contain a granular laundry detergent powder as follows :
  • the detergent composition may take any suitable form e.g. any liquid, gel, granulated powder or combination thereof. It is of course to be understood that the invention is not intended to be restricted to the details of the above embodiments which are described by way of example only.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Packages (AREA)
  • Detergent Compositions (AREA)
  • Wrappers (AREA)

Abstract

One or more water-soluble capsules (3) containing a detergent composition in combination with a package (1) containing the one or more water-soluble capsules, characterised in that the package is formed from a material which has a Moisture Vapour Transfer Rate (M.V.T.R) of between 0.25 g/m2/day to 10 g/m2/day at 38 °C and 90% relative humidity. The Moisture Vapour Transfer Rate is between 0.25 g/m2/day to 5 g/m2/day at 38 °C and 90% relative humidity.In a preferred embodiment, the package is self-standing by means of a collapsible base (16) portion which expands from a collapsed position to an expanded position when one or more capsules is/are placed on the base, and is collapsible when empty so as to make the package substantially flat.

Description

PACKAGE FOR A WATER-SOLUBLE CAPSULE
The present invention relates to a package or container for one or more water-soluble capsules containing a detergent composition.
Detergent compositions for machine washing of laundry are provided in many forms such as free-flowing powders, liquids. Detergents in the form of compressed powder tablets are also commonly available.
Tablets have several advantages over free-flowing powdered products and these are well documented, in particular, as they do not require measuring they are thus easier to handle and dispense into the wash load and allow for accurate dosing of detergent .
More recently water-soluble capsules of detergent composition in liquid and other forms have been introduced. Water-soluble capsules generally comprise a detergent composition encapsulated with water-soluble film, such as polyvinyl alcohol. Encapsulation allows for handling without direct contact with the detergent composition. This is especially advantageous when the detergent composition includes aggressive cleaning components which would irritate the skin on direct contact .
Also, unlike tablets, the use of water-soluble packages enables discretising of particulate detergent composition without the need for compaction. Therefore the problems in solubility arising from compaction of particulate detergent are not encountered with water-soluble packages of this type of detergent .
A further advantage of water-soluble capsules is that this allows discretising of other types of detergent e.g. liquid. Liquid is far more readily dissolvable than compressed powder and so not prone to the dissolution problems encountered with tablets formed in this way.
However, a problem encountered with water-soluble capsules is that the water soluble film material is vulnerable to increased levels of ambient humidity during storage and this can lead to premature dissolution of the film and as a result the capsule may rupture and release it contents.
In the case of liquid-filled capsules, leaked liquid from a single ruptured capsule could, if not contained, lead to the dissolution of an entire package of capsules, which is highly undesirable.
Another problem is that if, during storage, the film of the water soluble capsule becomes damp, it may then increase the possibility of in-wash lodging as a tacky film is more likely to stick to the washing machine door before it has chance to be caught up in the main wash.
One solution might be to use waterproof but this can result in high temperatures (within the packaging) in many environments and this can contribute to film degradation. Thus, it can be seen that the significant benefits of increased solubility offered by encapsulation with water soluble film can be severely compromised by the susceptibility of the film to deteriorate during storage.
It is an object of the present invention to provide a package for containing water-soluble capsules of detergent, which overcome at least some of the above mentioned problems. In particular, it is an object of the invention to provide packaging for water-soluble capsules containing a detergent composition, which is protected against the effect of ambient moisture and is also simple, low-cost and convenient to use .
Accordingly, in one aspect the invention provides one or more water-soluble capsules containing a detergent composition in combination with a package containing said one or more water-soluble capsules, characterised in that the package is formed from a material which has a Moisture
2 Vapour Transfer Rate (M.V.T.R) of between 0.25 g/m /day to
2 10 g/m /day at 38 °C and 90% relative humidity, and
2 2 preferably between 0.25 g/m /day to 5 g/m /day at 38 °C and
90% relative humidity.
With this arrangement, the water soluble capsules can be protected from ambient humidity during storage, by a simplified packaging.
A further problem is that many existing packages are unsuitable for encapsulated detergent - as they are designed for powders (e.g. boxes/bags from which powder is scooped) or liquids (bottles/refill bags from which the liquid is poured) or boxes in which tablets are stacked. Such packaging does not capitalise on such characteristics of water-soluble film encapsulated detergent such as the possibility of direct handling.
Thus, advantageously, the package is self-standing by means of a collapsible base portion which expands from a collapsed position to an expanded position when one or more capsules is/are placed on the base, and is collapsible when empty so as to make the package substantially flat.
With this arrangement, the amount of plastic packaging material disposed in the environment can be substantially decreased as there is no need to also provide a separate support structure to allow the package to stand upright. The provision of a self-standing package is particularly advantageous when used with encapsulated detergent, as the capsules can be conveniently retrieved by reaching into the standing package, even when there is only a single capsule remaining therein.
Preferably the package is formed as a single-walled body. The term "single-walled" should be construed as meaning that at any point the is only one wall thick. It includes a body comprising one or more walls which have a laminate structure .
The invention will be more clearly understood from the following description of some embodiments thereof, given by way of example only, with reference to the accompanying drawings in which:- Figure 1 is a perspective view of a sealed package containing a round-shaped water-soluble capsule of liquid detergent, according to the invention;
Figure 2 is a front view of the package of Figure 1, shown empty;
Figure 3 is a plan view of the package of Figure 1, viewed from the base;
Figure 4 is a perspective view of another embodiment of the invention;
Figure 5 is a front view of the package of figure 4;
Figure 6 is a plan view of the package of Figure 4, viewed from the base; and
Figure 7 is a side view of the package of figure 4.
The packaging system of the invention is intended to consist of a consumer unit containing the detergent composition of the invention and designed to be used/stored as such in the consumer homes .
The units shown are bags/pouches and can be made either from raw stock or from preformed and/or prefolded sheet material, and can be sealed by various means, e.g. by heat, adhesives/glue, tapes. The bags/pouches herein are made of films, either monolayer, including coextruded materials, or laminated; such films are typically paper or plastic or combinations of the two; preferred materials for the bags herein are plastic and/or paper laminates. Plastic, materials are typically polyolefines, and both plastic and paper can be virgin or recycled material; the films herein can be printed in different ways, typically gravure, flexo, offset . Also encompassed herein are films with moisture barrier properties, obtained by resins, either coextruded or in different laminated layers, or coating by e.g. lacquers. One combination of the invention is shown, comprising a plastic bag 1 which contains one or more water soluble capsules 3 (only one shown) of detergent liquid.
Other shaped water-soluble capsules may be used e.g. round, as shown in figures 1, 3 and 4 or rectangular (sometimes referred to as λpillow-shaped' ) as shown in figure 5.
The plastic bag 1 is constructed from a laminar material comprising two layers: an outer layer of polyester (PET) which is 12 microns thick and an inner layer of low linear density polyethylene (LLDPE) 150 microns thick. This
2 material has an MVTR value of 4.60 g/m /day at 38 °C and 90% relative humidity.
The bag has two rectangular side walls 2, 4 which are heat (or glue) -sealed together along corresponding longitudinal edges and which is closed at one end (the base portion 17) by a base wall 6 and at the other end (the upper portion 18) by 20, 22 seals both which are described below in greater detail . In the base portion 17 of the bag 1 there is a base wall 6 which is formed from a rectangular sheet of plastic, perimeter portions of which are heat (or glue) -sealed to respective edges portions of the end portions 8, 10 of the side walls 2,4. The sealing portion 12 (i.e. the part forming the seal with the base wall 6) is shaped such that the effective base area 16 is very generally elliptical (as shown more clearly in figure 3) .
At the upper end 18 of the bag 1, there is a resealable closure member 20, which comprises a plastic zip 20 having corresponding engagement portions fixed on respective side walls 2,4, internally of the bag 1.
The package further includes a permanent heat or glue seal 22 in the uppermost portion 18a. Just below this portion, there is an indent 26 in the seal section 5 and/or 7, to assist tearing (along the dotted line 28, which may be weakened) so as to enable removal of the upper portion 18a (after purchase) . The bag 1 can then be opened and sealed/resealed repeatedly by use of the zip 20.
The bag 1 is self-standing on a substantially flat surface shown generally at 14, (and which could be for example a shelf, work top etc.,) when one or more capsules is/are placed on the base portion: the weight of the capsule acts downward on the base wall which thereby expands laterally to support the capsule and as a result the package is disposed in an upright position. The construction as described above allows the bag to be formed one wall thick but self-standing and without a supporting structure such as a box.
An alternative embodiment is constructed as shown in figures 1-3 but is formed from an alternative sheet material. In this embodiment, the laminar material comprises two layers: an outer layer of polyester (PET) which is 12 microns thick and an inner layer of low linear density polyethylen (LLDPE) 180 microns thick. This material has an MVTR value of
2
4.50 g/m /day at 38 °C and 90% relative humidity. This increased thickness of the LLDPE layer provides a reduced MVTR and additional stability for larger packs (e.g. where say 20 -30 or more capsules are packaged) .
A further embodiment is shown in figures 4-7. This bag is structure as for the package above except that it has outwardly curved sides which provide extra volume. The bag may have an increased outer curvature at the base so as to lower the centre of gravity of the package when one or more capsules, are contained so providing a more stable package.
The package of figures 4-7 may comprise any suitable material, such as that in the embodiment shown in figures 1-3.
The detergent liquid contained in the water soluble capsules exemplified here comprises:
In another embodiment, capsules contain a granular laundry detergent powder as follows :
Base powder
Linear Dodecylbenzene Sulphonic Acid (Sodium salt) 8.8%
Alcohol ethoxylate (C12 - C13 7 EO) 7.0%
C16 -C18 Carboxylic acid 1.0%
Zeolite 29.6%
Anhydrous Sodium Carbonate 10.5%
Moisture, Salts, Minors 4.1% (All above in a granulated Base Powder)
Post-dosed ingredients Sodium Percarbonate 18.0% Tetracetyl ethylenediamine 3.5% Sodium Disilicate 5.5% Sodium Citrate 2.0%
Fluorescer, antifoam, speckles, enzyme , fragrance , minors
10.0%
However, it will be well appreciated that the detergent composition may take any suitable form e.g. any liquid, gel, granulated powder or combination thereof. It is of course to be understood that the invention is not intended to be restricted to the details of the above embodiments which are described by way of example only.

Claims

One or more water-soluble capsules containing a detergent composition in combination with a package containing said one or more water-soluble capsules, characterised the package is formed from a material which has a Moisture Vapour Transfer Rate (M.V.T.R) of between 0.25 g/m /day to 10 g/m /day at 38 °C and 90% relative humidity.
A combination according to claim 1, characterised in that the material has a Moisture Vapour Transfer Rate of between 0.25 g/m /day to 5 g/m /day at 38 °C and 90% relative humidity.
3. A combination according to any preceding claim, characterised in that the package is self-standing by means of a collapsible base portion which expands from a collapsed position to an expanded position when one or more capsules is/are placed on the base, and is collapsible when empty so as to make the package substantially flat.
4. A combination according to claim 3 characterised in that the base is expandable in a direction outwardly of the package interior and collapsible by folding inwardly of the package interior.
5. A combination according to claim 3 or 4 characterised in that the base is expandable in a direction outwardly of the package interior and collapsible/expandable by means of resilient portions.
6. A combination according to any preceding claim characterised in that the package has outwardly curved sides .
7. A combination according to claim 6 characterised in that the sides have increased outward curvature toward the base of the package.
8. A combination according to any preceding claim characterised in that the package includes resealable closure means .
9. A combination according to claim 8 characterised in that the resealable closure means comprises a zip member .
10. A combination according to any preceding claim characterised in that the package is a flexible bag.
11. A combination according to any preceding claim characterised in that the detergent composition is a liquid or includes a liquid portion.
12. A combination according to any of claims 1-10 characterised in that the detergent composition is a powder or includes a powder portion.
13. A combination according to any of claims 1-10 characterised in that the detergent composition is a gel or includes a gel portion.
14. A combination substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings .
EP02804168A 2001-12-03 2002-09-17 Package for a water-soluble capsule Withdrawn EP1451079A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0128946.1A GB0128946D0 (en) 2001-12-03 2001-12-03 Package for a water-soluble capsule
GB0128946 2001-12-03
PCT/EP2002/010415 WO2003047998A1 (en) 2001-12-03 2002-09-17 Package for a water-soluble capsule

Publications (1)

Publication Number Publication Date
EP1451079A1 true EP1451079A1 (en) 2004-09-01

Family

ID=9926928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02804168A Withdrawn EP1451079A1 (en) 2001-12-03 2002-09-17 Package for a water-soluble capsule

Country Status (8)

Country Link
US (1) US20050061704A1 (en)
EP (1) EP1451079A1 (en)
AR (1) AR037473A1 (en)
AU (1) AU2002333849B2 (en)
BR (1) BR0214172A (en)
CA (1) CA2465393A1 (en)
GB (1) GB0128946D0 (en)
WO (1) WO2003047998A1 (en)

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US20120070106A1 (en) * 2010-09-20 2012-03-22 Gustavo Jose Camargo-Parodi Flexible bag containing unit dose articles
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US9365808B2 (en) 2011-09-28 2016-06-14 Eric Sternberg Composition and system for treating a drain and methods thereof
US20140091108A1 (en) * 2012-09-28 2014-04-03 Eric Sternberg System and method of treating a drain
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PL3050953T3 (en) 2015-02-02 2019-07-31 The Procter And Gamble Company Detergent composition
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Also Published As

Publication number Publication date
US20050061704A1 (en) 2005-03-24
AU2002333849B2 (en) 2005-11-10
AU2002333849A1 (en) 2003-06-17
WO2003047998A1 (en) 2003-06-12
CA2465393A1 (en) 2003-06-12
AR037473A1 (en) 2004-11-10
BR0214172A (en) 2004-09-28
GB0128946D0 (en) 2002-01-23

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