EP1405800A1 - Capsule solubles dans l'eau - Google Patents

Capsule solubles dans l'eau Download PDF

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Publication number
EP1405800A1
EP1405800A1 EP20030255527 EP03255527A EP1405800A1 EP 1405800 A1 EP1405800 A1 EP 1405800A1 EP 20030255527 EP20030255527 EP 20030255527 EP 03255527 A EP03255527 A EP 03255527A EP 1405800 A1 EP1405800 A1 EP 1405800A1
Authority
EP
European Patent Office
Prior art keywords
capsule
water
coloured
soluble
capsule according
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.)
Granted
Application number
EP20030255527
Other languages
German (de)
English (en)
Other versions
EP1405800B1 (fr
Inventor
Andreas Theodorus Johannes Groot
Vidyadhar Sudhir Ranade
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
Priority claimed from GB0222963A external-priority patent/GB0222963D0/en
Priority claimed from GB0227689A external-priority patent/GB0227689D0/en
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP1405800A1 publication Critical patent/EP1405800A1/fr
Application granted granted Critical
Publication of EP1405800B1 publication Critical patent/EP1405800B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • This invention relates to a water-soluble capsule containing a liquid composition, such as a detergent composition e.g. for the cleaning of fabrics in a washing machine or crockery etc. in a dishwashing machine.
  • a liquid composition such as a detergent composition e.g. for the cleaning of fabrics in a washing machine or crockery etc. in a dishwashing machine.
  • Detergent compositions for machine washing of laundry are provided in many forms such as free-flowing powders, liquids, etc..
  • Detergents in the form of compressed powder tablets are also commonly available. These are advantageous in that they do not require measuring they are thus easier to handle and dispense into the wash load and allow for accurate dosing in detergent.
  • Water-soluble capsules generally comprise a detergent composition encapsulated with water-soluble film, such as polyvinyl alcohol. Encapsulation allows for handling of the product 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.
  • Liquid detergents also offer potential aesthetic benefits in so far as they can be coloured e.g. to denote a particular function or fragrance.
  • colouring of the fluid can be problematic in so far as the colouring agent, e.g. dye or pigment used can be unstable in the liquid.
  • a further problem is that the capsule film can be visually unappealing to some consumers.
  • the invention provides a water-soluble capsule comprising a visually clear water-soluble film containing a visually clear fluid, the capsule comprising a base wall portion inclined relative to one or more further wall portions, and the film comprising a coloured portion and a non-coloured portion and the coloured portion having a sufficiently large area in relation to the area of the non-coloured portion such that the non-coloured portion and the fluid appear coloured.
  • the effect of this arrangement is that only part of the capsule need be coloured in order to achieve a greater/full coloured effect i.e. so that more than the coloured part of the capsule appears coloured to the naked eye.
  • the fluid can be made to appear coloured by colouring only part of the film thus using a reduced level of colourant (as compared with the levels required if colourants were to be added to the fluid thereby reducing the cost - financial and environmental - and the likelihood of colourant-related staining of the coloured capsule.
  • the film itself also appears coloured thereby enhancing its visual characteristics.
  • a further advantage is that new colour variants/interesting visual effects can be easily introduced by the manufacturer, simply by selecting the appropriately coloured film, rather than reformulating with new fluid colours, which can be expensive.
  • non-coloured is intended to mean the formulation (of the film or contained liquid as the case may be) is substantially free of colourants (e.g. dyes, pigments); and the term “clear” is intended to mean any substance which is capable of letting light pass therethrough.
  • colourants e.g. dyes, pigments
  • the fluid may be a detergent liquid or gel such as is used in a laundry process (i.e. including detergents, conditioners, fresheners, and the like) or machine dishwashing process.
  • a laundry process i.e. including detergents, conditioners, fresheners, and the like
  • machine dishwashing process i.e. including detergents, conditioners, fresheners, and the like
  • the capsule containing a unit dose of a transparent liquid detergent composition.
  • the fluid may have a refractive index from 1 to 2.0 and preferably from 1.3 to 1.5.
  • the invention is not limited to this. Indeed, the fluid may also be coloured.
  • the colour of the film will effect this colour and a new 'hybrid' colouration effect produced, wherein both the film and fluid appear to have the same 'hybrid' colour, resulting from the combination of the two colours.
  • the capsule may take any suitable shape in order to produce the inclined wall formation which contributes to the colouration effect.
  • the further one or more wall portions may include a body wall which is curved (when viewed from the side) and which may provide a recess for containing said liquid.
  • the body wall may be dome shaped.
  • the relative inclination of the body and further walls may be from 0° to 90°, preferably from 0° to 80°, further preferably from 30° to 70°, e.g. 50° and (where internal acute angle is referred to here).
  • the dome shaped body wall is thermoformed and the base wall sealed thereto.
  • One or more of the capsule walls may have a curved outer perimeter e.g. circular or oval.
  • the capsule may also be "pillow shaped" i.e. formed with rectangular or square side walls, one or both of which bulge when filled with fluid to form a pillow-like body.
  • the base radius/capsule height ratio is preferable from 1 to 5, and even more preferably from 1.2 to 2.0 and more preferably from 1.4 to 1.6 and even more preferably from 1.45 to 1.55.
  • this ratio is 1.47.
  • the term 'radius' should be interpreted to mean an equivalent dimension i.e. the average distance from centre to the side(s) of the base e.g. half the base width of a square shaped capsule.
  • any suitable part or parts of the capsule film may be coloured.
  • Coloured film may be used to form one or more walls of the capsule, the non-coloured film forming the remainder of the capsule walls etc.
  • the capsule may have one or more walls coloured, e.g. the base wall or the body wall of the above mentioned dome-shaped capsule.
  • the capsule walls may comprise a combination of coloured and non-coloured film, e.g. a colour film may be attached to existing non-coloured walls on the inside or outside.
  • the coloured portion may comprise 20% to 80%, preferably 30% to 70% e.g. 50% of the total surface area of the capsule.
  • the film of one or more walls may have a laminar structure, wherein one or more coloured layers are included.
  • a laminar structure preferably the inner layer or layers, and more preferably the innermost layer or layers are coloured. This provides a good colouration effect.
  • the colourant is a pigment, but it can also be in the form of a dye.
  • the invention provides a process for making a water-soluble capsule comprising a visually clear water-soluble film containing a visually clear fluid for release on dissolution of the capsule, the process comprising the steps of
  • the above process may be a vertical form fill and seal (VFFS) process or horizontal form fill and seal (HFFS) process or rotary form fill and seal process (RFFS).
  • VFFS vertical form fill and seal
  • HFFS horizontal form fill and seal
  • RFFS rotary form fill and seal process
  • the capsules are made with a coloured wall(s) and non-coloured wall(s).
  • a dome-shaped capsule 1 comprising a body portion 8 containing a measured unit dose of a transparent liquid detergent composition 2. Surrounding the body portion is an annular seal 10.
  • the body portion 8 is defined by a body wall 4 formed from a transparent non-coloured film and a base wall 6 formed from a transparent coloured film.
  • the capsule has a rounded appearance.
  • the colourant used here is a blue dye.
  • the capsule has only one wall coloured and yet the whole capsule appears blue (must tally with colourant) due to the reflection by the coloured film and refraction of light by the contained liquid. The result is a pleasing appearance, using very low level of colourant.
  • the capsule 1 is formed using a horizontal form fill and seal (HFFS) process in which a first non-coloured transparent sheet of a water-soluble material is thermoformed to form the domed body wall 4 of the body portion and the liquid 2 is placed therein. A second sheet of a coloured transparent water-soluble material is then superimposed over the first sheet and the first and second sheets are then heat sealed along a continuous region of the superposed sheets surrounding the liquid 2 to form a base wall 6.
  • HFFS horizontal form fill and seal
  • Figure 2 shows a side view the capsule of figure 1 so as to demonstrate how the ratio of the dome height b relative to the radius of the dome base a can be selected for enhanced colouration effect.
  • Capsules may not have exactly the shape as given in the drawings.
  • the top film in the drawing at the bottom
  • the length b is determined starting from the level of the seal as this determines the colouring the effect.
  • the length b may deviate from the overall capsule height when measured from the floor.
  • a capsule is formed as described for the first embodiment, except that in this case the base wall 6 is formed from an inner and an outer sheet of transparent water-soluble film, wherein innermost is non-coloured and the outermost coloured.
  • innermost is non-coloured and the outermost coloured.
  • the capsules contain a liquid detergent composition.
  • a liquid detergent composition it is preferred that the composition is essentially non-aqueous.
  • compositions may be used which contain substantial amounts of water, provided that this water is in a form where its chemical activity is reduced (e.g. as water of crystallisation or in combination with a solvent such that its vapour pressure is reduced) such that the soluble film does not dissolve prematurely.
  • a suitable substantially non-aqueous visually clear liquid formulation is:-
  • Another suitable formulation is: liquid properties formulation see next table colour clear, transparent, colourless viscosity 270 mPas refractive index 1,333 @ 20°C formulation ingredient level [%]
  • Nonionic 7EO 20.0 Monopropylene glycol 23.0
  • suitable colourants for the film include, but are not limited to, dyes and/or pigments.
  • a suitable dye would be Vitasyn Patent blue V dye.
  • a suitable pigment would be Iragon Blue pigment supplied by Ciba Speciality Chemicals.
  • capsules according to the invention can conveniently be placed directly into the wash liquor where the film dissolves, releasing the liquid detergent composition.
EP03255527A 2002-10-03 2003-09-04 Capsule solubles dans l'eau Expired - Lifetime EP1405800B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0222963A GB0222963D0 (en) 2002-10-03 2002-10-03 Water-soluble capsule
GB0222963 2002-10-03
GB0227689 2002-11-27
GB0227689A GB0227689D0 (en) 2002-11-27 2002-11-27 Water-soluble capsule

Publications (2)

Publication Number Publication Date
EP1405800A1 true EP1405800A1 (fr) 2004-04-07
EP1405800B1 EP1405800B1 (fr) 2006-11-15

Family

ID=31995708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03255527A Expired - Lifetime EP1405800B1 (fr) 2002-10-03 2003-09-04 Capsule solubles dans l'eau

Country Status (3)

Country Link
EP (1) EP1405800B1 (fr)
AT (1) ATE345284T1 (fr)
DE (1) DE60309648D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029330A1 (fr) * 2008-09-10 2010-03-18 Datalase Ltd. Gélule hydrosoluble

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394983A (en) * 1963-06-14 1968-07-30 American Cyanamid Co Dip-dyeing capsules
WO2001036290A1 (fr) * 1999-11-17 2001-05-25 Reckitt Benckiser (Uk) Limited Contenants solubles dans l'eau moules par injection
US20020033004A1 (en) * 1999-03-17 2002-03-21 Unilever Home & Personal Care Usa, Division Of Conopco, Inc. Water soluble package

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394983A (en) * 1963-06-14 1968-07-30 American Cyanamid Co Dip-dyeing capsules
US20020033004A1 (en) * 1999-03-17 2002-03-21 Unilever Home & Personal Care Usa, Division Of Conopco, Inc. Water soluble package
WO2001036290A1 (fr) * 1999-11-17 2001-05-25 Reckitt Benckiser (Uk) Limited Contenants solubles dans l'eau moules par injection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029330A1 (fr) * 2008-09-10 2010-03-18 Datalase Ltd. Gélule hydrosoluble

Also Published As

Publication number Publication date
EP1405800B1 (fr) 2006-11-15
ATE345284T1 (de) 2006-12-15
DE60309648D1 (de) 2006-12-28

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