EP2627577B1 - Emballage comprenant une composition de lessive, et procédé de lavage au moyen de l'emballage - Google Patents

Emballage comprenant une composition de lessive, et procédé de lavage au moyen de l'emballage Download PDF

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Publication number
EP2627577B1
EP2627577B1 EP11764218.1A EP11764218A EP2627577B1 EP 2627577 B1 EP2627577 B1 EP 2627577B1 EP 11764218 A EP11764218 A EP 11764218A EP 2627577 B1 EP2627577 B1 EP 2627577B1
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EP
European Patent Office
Prior art keywords
particles
package
coating
reservoir
coated
Prior art date
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EP11764218.1A
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German (de)
English (en)
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EP2627577A1 (fr
Inventor
Judith Maria Bonsall
Andrew Paul Chapple
Stephen Thomas Keningley
Alyn James Parry
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Unilever PLC
Unilever NV
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Unilever PLC
Unilever NV
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Priority to EP11764218.1A priority Critical patent/EP2627577B1/fr
Publication of EP2627577A1 publication Critical patent/EP2627577A1/fr
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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
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/325—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil
    • B65D75/327—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil and forming several compartments
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4436—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of a detergent solution made by gradually dissolving a powder detergent cake or a solid detergent block
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4472—Blister packaging or refill cartridges
    • 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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/04—Containers or packages with special means for dispensing contents for dispensing annular, disc-shaped, or spherical or like small articles, e.g. tablets or pills
    • B65D83/0445—Containers or packages with special means for dispensing contents for dispensing annular, disc-shaped, or spherical or like small articles, e.g. tablets or pills all the articles being stored in individual compartments
    • B65D83/0463—Containers or packages with special means for dispensing contents for dispensing annular, disc-shaped, or spherical or like small articles, e.g. tablets or pills all the articles being stored in individual compartments formed in a band or a blisterweb, inserted in a dispensing device or container
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/026—Devices for adding soap or other washing agents the powder or tablets being added directly, e.g. without the need of a flushing liquid

Definitions

  • the present invention relates to a dispensing device for dispensing concentrated particulate detergent compositions in e.g. a washing machine.
  • Particulate detergent compositions with improved environmental profiles could, in theory, be designed by eliminating all components from the composition that provide limited, or no, cleaning action. Such compact products would also reduce packaging requirements.
  • One problem with compact or concentrated compositions is that consumers must dose accurately however they tend to use more of the composition than is recommended, probably due to their familiarity with the previous less concentrated variants. Studies have shown that consumers tend to overdose concentrated compositions and this is bad for their pocket and bad for the environment. Dosing measures are frequently provided, and ignored.
  • EP 0903405 discloses a packaged product in the form of a blister packaging comprising a plurality of individual reservoirs, each containing a dose of a concentrated particulate laundry composition.
  • the present invention provides a packaged product comprising a package comprising a plurality of individual reservoirs, each of the reservoirs containing a predetermined dose of a concentrated particulate laundry wherein at least 70 % by number of the particles of the composition comprising a high-surfactant hard core and a coating and wherein all the particles are non spherical and at least 0.2 mm in diameter.
  • coated particulate concentrated detergent compositions of the invention with large non-spherical similarly shaped and sized particles provide a slow, steady and predictable flow from the small reservoirs and eliminates or at least minimises product residue in the reservoirs.
  • conventional powders the inner surfaces of the reservoir become coated with a fine dusting, which would affect the transparency. For this reason, traditionally powders are mostly sold in opaque cartons or pouches.
  • the large hard-coated particles of the invention do not form a film over the reservoir surface.
  • the coating reduces the stickiness of the hygroscopic surfactant core to a point where the particles are free flowing across a surface. This together with the particle size means that any composition left in the package after tipping/pouring etc. are present in minor and localised amounts. A gentle tap releases them from the surface. Even liquid formulations do not provide this advantage - liquids coat then inner surfaces of reservoirs and so leave residue.
  • the package is sufficiently rigid in material and/or construction such that a portion e.g. the base or a side wall, can be tapped to move the particles from the reservoir/s. Such tapping creates audible feedback to the user to guide them as to the movement of the particles.
  • the large format of the particles reduces the impact of stickiness as the number of potential bridging points is reduced and the force exerted by each particle when it attempts to move is much greater than a conventional powder due to the mass of each particle being about 25 times greater. Thus even under slightly damp conditions, as may be experienced in a laundry room, the particles remain more reliably slow flowing.
  • the package may comprise a tray of individual recesses, each recess providing an individual reservoir covered by a lid. There may be a common lid for two or more recesses.
  • the package comprises a blister pack.
  • the blister pack preferably comprises a planar sheet of plastic provided with "blisters" or concave protrusions configured in various patterns, e.g. rows and columns. Each of the blisters or concave protrusions is sized to receive a predetermined dose of the composition.
  • the blister pack further comprises at least one backing layer is fastened to the solid receiving side of the blister pack. This layer is a low strength retaining layer. This low strength retaining layer stretches across the backs of the blisters and retains the doses individually sealed within each of the blisters.
  • the blister pack is mounted with the low strength retaining layer facing down.
  • the packaged product may comprise a dispenser comprising a rigid support frame on which is mounted said pack, whereby manual force on a selected reservoir ejects that dose from the package.
  • the dispenser may be installed in a machine e.g. washing machine drawer so manual force on a selected dose ejects this dose from the blister pack directly into the drawer or drawer compartment if compartments are provided.
  • the blister pack and dispenser are preferably water insoluble.
  • the rigid support frame preferably comprises at least one wall with one or more apertures therein such that water flow is minimally restricted.
  • the frame may comprise a mesh structure and/or support pillars optionally with cross ties or the like.
  • the structure should also have smooth contours and generally convex rather than concave surface configuration/ patterning such that water and/or laundry composition cannot become trapped.
  • the dispensing device is preferably water insoluble so it can be left in the machine.
  • the device may be installed for use e.g. on the upper edges of the drawer, so that the dose can be dosed directly into the drawer, and then removed prior to the washing operation.
  • the frame has sufficient rigidity to withstand the manual force required to break the blister pack. Some elasticity may be allowed, at higher forces than that required to break the blister open, and indeed may even be desirable.
  • the walls may be flexible (or flexibly attached to the rest of the frame), so that the will flex against the drawer sides. With this feature, during fitting these can be forced to flex inward and then once in place, and they are released so as to urge against the sides of the drawer, thereby preventing movement of the dispensing device whilst in place in the drawer.
  • the blister pack is mounted removably. This way it may be replaced when required, e.g. all the doses have been used, or for an alternative blister pack with different composition.
  • the blister pack may contain unit doses with different compositions.
  • the rigid frame and blister pack comprise an engaging mechanism for secure mounting.
  • this mechanism comprises mutually interengaging projections and recesses on the frame and pack.
  • the rigid support frame may comprise recesses corresponding with the shape of the blisters. For example, if the blisters are circular, there may be annular or semi-circular recesses along the support frame. These can engage with the blisters and provide support and/or secure positioning of the blister pack.
  • the rigid frame comprises a wall or walls having supporting upper edges which correspond to an outer perimeter of the blister pack so that it is supported along its perimeter. Further walls can be provided to provide further support between the unit doses, these further walls preferably corresponding with areas of the blister pack between the unit doses.
  • the support frame may comprise an upper supporting edge which is inclined with respect to the base, whereby the mounted blister pack is also inclined. With this arrangement, the blister pack may be better viewed by the user.
  • the invention provides a method of washing fabrics within a washing machine, with the package of the first aspect of the invention, the method comprising the step of manually pressing on a dose in one of the reservoirs to eject the dose from the blister pack.
  • the above method preferably comprises the earlier step of mounting the package e.g. blister pack onto the rigid support frame.
  • the method may comprise the step of installing the rigid support frame, before or after installing the package thereon, into the drawer of a washing machine, whereby the step of manually pressing externally of a reservoir in the package, ejects the dose from the reservoir into the drawer.
  • the method may optionally comprise the step of removing the rigid support frame from the drawer before washing or it may comprise the step of beginning the wash process with the rigid support frame installed in the drawer, with or without the package.
  • the blister pack is to remain in place mounted on the rigid support frame during a wash it should comprise water soluble materials or at least an outer water soluble barrier.
  • the or each reservoir comprises a transparent portion. This allows the consumer to see when all the dose has been preferably the or each transparent portion comprises at least a part of the base of the reservoir, such that the composition contained within is visible when viewed looking at the base. This is advantageous for e.g. blister packs which tend to be used base upwards.
  • the or each transparent portion comprises more than 50%, more preferably more than 60%, and most preferably more than 75% of the surface area of the reservoir.
  • transparent means that its light transmittance is greater than 25% at wavelength of about 410-800 nm.
  • the or each transparent portion according to the invention preferably has a transmittance of more than 25%, more preferably more than 30%, more preferably more than 40%, more preferably more than 50% in the visible part of the spectrum (approx. 410-800 nm).
  • absorbency of transparent layer may be measured as less than 0.6 (approximately equivalent to 25% transmitting) or by having transmittance greater than 25% wherein % transmittance equals: 1 10 absorbency ⁇ 100 %
  • absorbency of the opaque layer may be measured as more than 0.6.
  • absorbency of bottle may be measured as less than 0.6 (approximately equivalent to 25% transmitting) or by having transmittance greater than 25% wherein % transmittance equals: 1 10 absorbency x 100% and corresponding absorbency levels for the remaining preferred levels above.
  • Suitable materials for the package include, but are not limited to: polypropylene (PP), polyethylene (PE), polycarbonate (PC), polyamides (PA) and/or polyethylene terephthalate (PETE), polyvinylchloride (PVC); and polystyrene (PS).
  • the reservoirs may formed by moulding e.g. blow moulding from a preform or by thermoforming or by injection moulding.
  • the packaged particles are substantially the same shape and size as one another.
  • the composition comprises greater than 40 wt% detergent surfactant.
  • at least 70% by number of the particles comprise a core, comprising mainly surfactant, and around the core a water soluble coating comprising 15 to 45 wt% of the coated particle.
  • each coated particle has perpendicular dimensions x, y and z, wherein x is from 0.2 to 2 mm, y is from 2.5 to 8mm (preferably 3 to 8 mm), and z is from 2.5 to 8 mm (preferably 3 to 8 mm) and preferably the packaged particles are substantially the same shape and size as one another.
  • the coating comprises at least 10 wt% of a water soluble salt. More preferably the water soluble salt comprises an inorganic salt. Most preferably it comprises sodium carbonate.
  • the coating may further comprise a minor amount of sodium carboxy methyl cellulose (SCMC), sodium silicate, water soluble fluorescer, water soluble or dispersible shading dye, pigment, coloured dye and mixtures thereof.
  • SCMC sodium carboxy methyl cellulose
  • SCMC sodium silicate
  • water soluble fluorescer water soluble or dispersible shading dye
  • pigment coloured dye and mixtures thereof.
  • the amount of coating on each coated particle is preferably 20 to 35 % by weight of the particle.
  • the number percentage of the packaged composition of particles comprising the core and coating is preferably at least 85%.
  • the coated particles preferably comprise from 0.001 to 3 wt% perfume.
  • the core of the coated particles preferably comprises less than 5 wt%, even more preferably less than 2.5 wt% inorganic materials.
  • the particles are desirably oblate spheroids with diameter (y and z) of 3 to 6 mm and thickness (x) of 1 to 2 mm.
  • At least some, and preferably a major portion by number of the particles may be coloured other than white, as this makes it easier to see them to determine that the required dose level has been reached. Multicoloured, e.g. some blue and some white, particles have been found to provide even higher visual definition for the optimum control of dose. Colour may be imparted by dye, pigment or mixtures thereof.
  • a preferred manufacturing process is set forth in PCT/EP2010/055256 . It comprises blending surfactants together and then drying them to a low moisture content of less than 1 %.
  • Scraped film devices may be used.
  • a preferred form of scraped film device is a wiped film evaporator.
  • One such suitable wiped film evaporator is the "Dryex system" based on a wiped film evaporator available from Ballestra S.p.A..
  • Alternative drying equipment includes tube-type driers, such as a Chemithon Turbo Tube® drier, and soap driers. The hot material exiting the scraped film drier is subsequently cooled and broken up into suitable sized pieces to feed to the extruder.
  • Simultaneous cooling and breaking into flakes may conveniently be carried out using a chill roll. If the flakes from the chill roll are not suitable for direct feed to the extruder then they can be milled in a milling apparatus and /or they can be blended with other liquid or solid ingredients in a blending and milling apparatus, such as a ribbon mill. Such milled or blended material is desirably of particle size 1 mm or less for feeding to the extruder.
  • Particulate material with a mean particle size of 10 nm to 10 ⁇ m is preferred for use as a milling aid.
  • materials there may be mentioned, by way of example: aerosil®, alusil®, and microsil®.
  • the dried surfactant blend is then extruded.
  • the extruder provides further opportunities to blend in ingredients other than surfactants, or even to add further surfactants.
  • all of the anionic surfactant, or other surfactant supplied in admixture with water; i.e. as paste or as solution, is added into the drier to ensure that the water content can then be reduced and the material fed to and through the extruder is sufficiently dry.
  • Additional materials that can be blended into the extruder are thus mainly those that are used at very low levels in a detergent composition: such as fluorescer, shading dye, enzymes, perfume, silicone antifoams, polymeric additives and preservatives.
  • Solid additives are generally preferred. Liquids, such as perfume may be added at levels up to 2.5 wt%, preferably up to 1.5 wt%. Solid particulate structuring (liquid absorbing) materials or builders, such as zeolite, carbonate, silicate are preferably not added to the blend being extruded. These materials are not needed due to the self structuring properties of the very dry LAS-based feed material. If any is used the total amount should be less than 5 wt%, preferably less than 4 wt%, most preferably less than 3 wt%. At such levels no significant structuring occurs and the inorganic particulate material is added for a different purpose, for instance as a flow aid to improve the feed of particles to the extruder.
  • the output from the extruder is shaped by the die plate used.
  • the extruded material has a tendency to swell up in the centre relative to the periphery.
  • the sliced extruded particles are then coated. Coating allows the particles to be coloured easily. Coating makes the particles more suitable for use in detergent compositions that may be exposed to high humidity for long periods.
  • the extruded particles can be considered as oblate spheroids with a major radius "a" and minor radius "b".
  • any known coating may be used, for instance organic, including polymer, it has been found to be particularly advantageous to use an inorganic coating deposited by crystallisation from an aqueous solution as this appears to give positive dissolution benefits and the coating gives a good colour to the detergent particle, even at lower coating levels.
  • An aqueous spray-on of coating solution in a fluidised bed may also generate a further slight rounding of the detergent particles during the fluidisation process.
  • Suitable inorganic coating solutions include sodium carbonate, possibly in admixture with sodium sulphate, and sodium chloride. Food dyes, shading dyes, fluorescer and other optical modifiers can be added to the coating by dissolving them in the spray-on solution or dispersion.
  • Use of a builder salt such as sodium carbonate is particularly advantageous because it allows the detergent particle to have an even better performance by buffering the system in use at an ideal pH for maximum detergency of the anionic surfactant system. It also increases ionic strength, which is known to improve cleaning in hard water, and it is compatible with other detergent ingredients that may be admixed with the coated extruded detergent particles.
  • the amount of coating should lie in the range 3 to 50 wt% of the particle, preferably 20 to 40 wt% for the best results in terms of anti-caking properties of the detergent particles.
  • the coated particles dissolve easily in water and leave very low or no residues on dissolution, due to the absence of insoluble structurant materials such as zeolite.
  • the coated particles have an exceptional visual appearance, due to the smoothness of the coating coupled with the smoothness of the underlying particles, which is also believed to be a result of the lack of particulate structuring material in the extruded particles.
  • compositions with up to 100 wt% of the particles are possible when basic additives are incorporated into the extruded particles, or into their coating.
  • the composition may also comprise, for example, an antifoam granule.
  • the coated detergent particle is preferably curved.
  • the size is such that y and z are at least 3 mm, preferably at least 4 mm, most preferably at least 5 mm and x lies in the range 0.2 to 2 mm, preferably 1 to 2 mm.
  • the coated laundry detergent particle may be shaped as a disc.
  • the core is primarily surfactant. It may also include detergency additives, such as perfume, shading dye, enzymes, cleaning polymers and soil release polymers.
  • the coated laundry detergent particle comprises between 50 to 90 wt% of a surfactant, most preferably 70 to 90 wt %.
  • a surfactant most preferably 70 to 90 wt %.
  • the nonionic and anionic surfactants of the surfactant system may be chosen from the surfactants described " Surface Active Agents" Vol. 1, by Schwartz & Perry, Interscience 1949 , Vol. 2 by Schwartz, Perry & Berch, Interscience 1958 , in the current edition of "McCutcheon's Emulsifiers and Detergents” published by Manufacturing Confectioners Company or in " Tenside Taschenbuch", H. Stache, 2nd Edn., Carl Hauser Verlag, 1981 .
  • the surfactants used are saturated.
  • Suitable anionic detergent compounds that may be used are usually water-soluble alkali metal salts of organic sulphates and sulphonates having alkyl radicals containing from about 8 to about 22 carbon atoms, the term alkyl being used to include the alkyl portion of higher acyl radicals.
  • suitable synthetic anionic detergent compounds are sodium and potassium alkyl sulphates, especially those obtained by sulphating higher C8 to C18 alcohols, produced for example from tallow or coconut oil, sodium and potassium alkyl C9 to C20 benzene sulphonates, particularly sodium linear secondary alkyl C10 to C15 benzene sulphonates; and sodium alkyl glyceryl ether sulphates, especially those ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum.
  • anionic surfactants are sodium lauryl ether sulphate (SLES), particularly preferred with 1 to 3 ethoxy groups, sodium C10 to C15 alkyl benzene sulphonates and sodium C12 to C18 alkyl sulphates. Also applicable are surfactants such as those described in EP-A-328 177 (Unilever ), which show resistance to salting out, the alkyl polyglycoside surfactants described in EP-A-070 074 , and alkyl monoglycosides. The chains of the surfactants may be branched or linear.
  • the fatty acid soap used preferably contains from about 16 to about 22 carbon atoms, preferably in a straight chain configuration.
  • the anionic contribution from soap may be from 0 to 30 wt% of the total anionic. Use of more than 10 wt% soap is not preferred.
  • At least 50 wt% of the anionic surfactant is selected from: sodium C11 to C15 alkyl benzene sulphonates; and, sodium C12 to C18 alkyl sulphates.
  • the anionic surfactant is present in the coated laundry detergent particle at levels between 15 to 85 wt%, more preferably 50 to 80wt%.
  • Suitable non-ionic detergent compounds which may be used include, in particular, the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example, aliphatic alcohols, acids, amides or alkyl phenols with alkylene oxides, especially ethylene oxide either alone or with propylene oxide.
  • Preferred nonionic detergent compounds are C6 to C22 alkyl phenol-ethylene oxide condensates, generally 5 to 25 EO, i.e. 5 to 25 units of ethylene oxide per molecule, and the condensation products of aliphatic C8 to C18 primary or secondary linear or branched alcohols with ethylene oxide, generally 5 to 50 EO.
  • the non-ionic is 10 to 50 EO, more preferably 20 to 35 EO. Alkyl ethoxylates are particularly preferred.
  • the non-ionic surfactant is present in the coated laundry detergent particle at levels between 5 to 75 wt%, more preferably 10 to 40 wt%.
  • Cationic surfactant may be present as minor ingredients at levels preferably between 0 to 5 wt%.
  • surfactants are mixed together before being dried. Conventional mixing equipment may be used.
  • the surfactant core of the laundry detergent particle may be formed by roller compaction and subsequently coated with an inorganic salt.
  • the core is calcium tolerant and this is a preferred aspect because this reduces the need for a builder.
  • Surfactant blends that do not require builders to be present for effective detergency in hard water are preferred. Such blends are called calcium tolerant surfactant blends if they pass the test set out hereinafter. However, the invention may also be of use for washing with soft water, either naturally occurring or made using a water softener. In this case, calcium tolerance is no longer important and blends other than calcium tolerant ones may be used.
  • Suitable calcium tolerant co-surfactants include SLES 1-7EO, and alkyl ethoxylate non-ionic surfactants, particularly those with melting points less than 40°C.
  • a LAS/SLES surfactant blend has a superior foam profile to a LAS Nonionic surfactant blend and is therefore preferred for hand washing formulations requiring high levels of foam.
  • SLES may be used at levels of up to 30%.
  • a preferred calcium tolerant coated laundry detergent particle comprises 15 to 100 wt% anionic surfactant of which 20 to 30 wt % is sodium lauryl ether sulphate.
  • a LAS/NI surfactant blend provides a harder particle and its lower foam profile makes it more suited for automatic washing machine use.
  • the coating may comprise a water soluble inorganic salt.
  • Other water compatible ingredients may be included in the coating.
  • fluorescer for example fluorescer, SCMC, shading dye, silicate, pigments and dyes.
  • the water soluble inorganic salts are preferably selected from sodium carbonate, sodium chloride, sodium silicate and sodium sulphate, or mixtures thereof, most preferably 70 to 100 wt % sodium carbonate.
  • the water soluble inorganic salt is present as a coating on the particle.
  • the water soluble inorganic salt is preferably present at a level that reduces the stickiness of the laundry detergent particle to a point where the particles are free flowing.
  • the amount of coating should lay in the range 15 to 45 wt % of the particle, preferably 20 to 40 wt %, even more preferably 25 to 35 wt % for the best results in terms of anti-caking properties of the detergent particles and control of the flow from the package.
  • the coating is applied to the surface of the surfactant core, by crystallisation from an aqueous solution of the water soluble inorganic salt.
  • the aqueous solution preferably contains greater than 50g/L, more preferably 200 g/L of the salt.
  • An aqueous spray-on of the coating solution in a fluidised bed has been found to give good results and may also generate a slight rounding of the detergent particles during the fluidisation process. Drying and/or cooling may be needed to finish the process.
  • the thickness of coating obtainable by use of a coating level of say 5 wt% is much greater than would be achieved on typically sized detergent granules (0.5-2 mm diameter sphere).
  • this surface area to volume ratio must be greater than 3 mm -1 .
  • the coating thickness is inversely proportional to this coefficient and hence for the coating the ratio "Surface area of coated particle" divided by "Volume of coated particle” should be less than 15 mm -1 .
  • the coated detergent particle comprises from 70 to 100 wt %, more preferably 85 to 90 wt %, of a detergent composition in a package.
  • the coated detergent particles are substantially the same shape and size by this is meant that at least 90 to 100 % of the coated laundry detergent particles in the in the x, y and z dimensions are within a 20%, preferably 10%, variable from the largest to the smallest coated laundry detergent particle in the corresponding dimension.
  • the coated particles preferably comprise from 0 to 15 wt % water, more preferably 0 to 10 wt %, most preferably from 1 to 5 wt % water, at 293K and 50% relative humidity. This facilitates the storage stability of the particle and its mechanical properties.
  • ingredients described below may be present in the coating or the core.
  • Dye may advantageously be added to the coating; it may also or alternatively be added to the core. In that case preferably the dye is dissolved in the surfactant before the core is formed.
  • Dyes are selected from anionic and non-ionic dyes
  • Anionic dyes are negatively charged in an aqueous medium at pH 7.
  • Examples of anionic dyes are found in the classes of acid and direct dyes in the Color Index (Society of Dyers and Colourists and American Association of Textile Chemists and Colorists).
  • Anionic dyes preferably contain at least one sulphonate or carboxylate groups.
  • Non-ionic dyes are uncharged in an aqueous medium at pH 7, examples are found in the class of disperse dyes in the Color Index.
  • the dyes may be alkoxylated.
  • Alkoxylated dyes are preferably of the following generic form: Dye-NR1 R2.
  • the NR1 R2 group is attached to an aromatic ring of the dye.
  • R1 and R2 are independently selected from polyoxyalkylene chains having 2 or more repeating units and preferably having 2 to 20 repeating units. Examples of polyoxyalkylene chains include ethylene oxide, propylene oxide, glycidol oxide, butylene oxide and mixtures thereof.
  • a preferred alkoxylated dye for use in the invention is:
  • the dye is selected from acid dyes; disperse dyes and alkoxylated dyes.
  • the dye is a non-ionic dye.
  • the dye is selected from those having: anthraquinone; mono-azo; bis-azo; xanthene; phthalocyanine; and, phenazine chromophores. More preferably the dye is selected from those having: anthraquinone and, mono-azo chromophores.
  • the dye is added to the coating slurry and agitated before applying to the core of the particle.
  • Application may be by any suitable method, preferably spraying on to the core particle as detailed above.
  • the dye may be any colour, preferable the dye is blue, violet, green or red. Most preferably the dye is blue or violet.
  • the dye is selected from: acid blue 80, acid blue 62, acid violet 43, acid green 25, direct blue 86, acid blue 59, acid blue 98, direct violet 9, direct violet 99, direct violet 35, direct violet 51, acid violet 50, acid yellow 3, acid red 94, acid red 51, acid red 95, acid red 92, acid red 98, acid red 87, acid yellow 73, acid red 50, acid violet 9, acid red 52, food black 1, food black 2, acid red 163, acid black 1, acid orange 24, acid yellow 23, acid yellow 40, acid yellow 11, acid red 180, acid red 155, acid red 1, acid red 33, acid red 41, acid red 19, acid orange 10, acid red 27, acid red 26, acid orange 20, acid orange 6, sulphonated Al and Zn phthalocyanines, solvent violet 13, disperse violet 26, disperse violet 28, solvent green 3, solvent blue 63, disperse blue 56, disperse violet 27, solvent yellow 33, disperse blue 79:1.
  • the dye is preferably a shading dye for imparting a perception of whiteness to a laundry textile.
  • the dye may be covalently bound to polymeric species.
  • a combination of dyes may be used.
  • the coated laundry detergent particle preferably comprises a fluorescent agent (optical brightener).
  • fluorescent agents are well known and many such fluorescent agents are available commercially. Usually, these fluorescent agents are supplied and used in the form of their alkali metal salts, for example, the sodium salts.
  • the total amount of the fluorescent agent or agents used in the composition is generally from 0.005 to 2 wt %, more preferably 0.01 to 0.1 wt %. Suitable Fluorescers for use in the invention are described in chapter 7 of Industrial Dyes edited by K. Hunger 2003 Wiley-VCH ISBN 3-527-30426-6 .
  • Preferred fluorescers are selected from the classes distyrylbiphenyls, triazinylaminostilbenes, bis(1,2,3-triazol-2-yl)stilbenes, bis(benzo[b]furan-2-yl)biphenyls, 1,3-diphenyl-2-pyrazolines and courmarins.
  • the fluorescer is preferably sulphonated.
  • Preferred classes of fluorescer are: Di-styryl biphenyl compounds, e.g. Tinopal (Trade Mark) CBS-X, Di-amine stilbene di-sulphonic acid compounds, e.g. Tinopal DMS pure Xtra and Blankophor (Trade Mark) HRH, and Pyrazoline compounds, e.g. Blankophor SN.
  • Di-styryl biphenyl compounds e.g. Tinopal (Trade Mark) CBS-X
  • Di-amine stilbene di-sulphonic acid compounds e.g. Tinopal DMS pure Xtra and Blankophor (Trade Mark) HRH
  • Pyrazoline compounds e.g. Blankophor SN.
  • Preferred fluorescers are: sodium 2 (4-styryl-3-sulfophenyl)-2H-napthol[1,2-d]triazole, disodium 4,4'-bis ⁇ [(4-anilino-6-(N methyl-N-2 hydroxyethyl) amino 1,3,5-triazin-2-yl)]amino ⁇ stilbene-2-2' disulfonate, disodium 4,4'-bis ⁇ [(4-anilino-6-morpholino-1,3,5-triazin-2-yl)]amino ⁇ stilbene-2-2' disulfonate, and disodium 4,4'-bis(2-sulfostyryl)biphenyl.
  • Tinopal® DMS is the disodium salt of disodium 4,4'-bis ⁇ [(4-anilino-6-morpholino-1,3,5-triazin-2-yl)]amino ⁇ stilbene-2-2' disulfonate.
  • Tinopal® CBS is the disodium salt of disodium 4,4'-bis(2-sulfostyryl)biphenyl.
  • the composition comprises a perfume.
  • the perfume is preferably in the range from 0.001 to 3 wt %, most preferably 0.1 to 1 wt %.
  • CTFA Cosmetic, Toiletry and Fragrance Association
  • Many suitable examples of perfumes are provided in the CTFA (Cosmetic, Toiletry and Fragrance Association) 1992 International Buyers Guide, published by CFTA Publications and OPD 1993 Chemicals Buyers Directory 80th Annual Edition, published by Schnell Publishing Co .
  • compositions of the present invention it is envisaged that there will be four or more, preferably five or more, more preferably six or more or even seven or more different perfume components.
  • top notes are defined by Poucher (Journal of the Society of Cosmetic Chemists 6(2):80 [1955 ]).
  • Preferred top-notes are selected from citrus oils, linalool, linalyl acetate, lavender, dihydromyrcenol, rose oxide and cis-3-hexanol.
  • the perfume may be added into the core either as a liquid or as encapsulated perfume particles.
  • the perfume may be mixed with a nonionic material and applied as a coating the extruded particles, for example by spraying it mixed with molten nonionic surfactant.
  • Perfume may also be introduced into the composition by means of a separate perfume granule and then the detergent particle does not need to comprise any perfume.
  • the coated detergent particles do not contain a peroxygen bleach, e.g., sodium percarbonate, sodium perborate, peracid.
  • a peroxygen bleach e.g., sodium percarbonate, sodium perborate, peracid.
  • the composition may comprise one or more further polymers.
  • further polymers are carboxymethylcellulose, poly (ethylene glycol), poly(vinyl alcohol), polyethylene imines, ethoxylated polyethylene imines, water soluble polyester polymers polycarboxylates such as polyacrylates, maleic/acrylic acid copolymers and lauryl methacrylate/acrylic acid copolymers.
  • One or more enzymes are preferably present in the composition.
  • the level of each enzyme is from 0.0001 wt% to 0.5 wt% protein.
  • enzymes include proteases, alpha-amylases, cellulases, lipases, peroxidases/oxidases, pectate lyases, and mannanases, or mixtures thereof.
  • Suitable lipases include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Examples of useful lipases include lipases from Humicola (synonym Thermomyces), e.g. from H. lanuginosa (T. lanuginosus) as described in EP 258 068 and EP 305 216 or from H. insolens as described in WO 96/13580 , a Pseudomonas lipase, e.g. from P. alcaligenes or P. pseudoalcaligenes ( EP 218 272 ), P. cepacia ( EP 331 376 ), P. stutzeri ( GB 1,372,034 ), P.
  • lipase variants such as those described in WO 92/05249 , WO 94/01541 , EP 407 225 , EP 260 105 , WO 95/35381 , WO 96/00292 , WO 95/30744 , WO 94/25578 , WO 95/14783 , WO 95/22615 , WO 97/04079 and WO 97/07202 , WO 00/60063 , WO 09/107091 and WO09/111258 .
  • Preferred lipase enzymes include LipolaseTM and Lipolase UltraTM, LipexTM (Novozymes A/S) and LipocleanTM.
  • the method of the invention may be carried out in the presence of phospholipase classified as EC 3.1.1.4 and/or EC 3.1.1.32.
  • phospholipase is an enzyme that has activity towards phospholipids.
  • Phospholipids such as lecithin or phosphatidylcholine, consist of glycerol esterified with two fatty acids in an outer (sn-1) and the middle (sn-2) positions and esterified with phosphoric acid in the third position; the phosphoric acid, in turn, may be esterified to an amino-alcohol.
  • Phospholipases are enzymes that participate in the hydrolysis of phospholipids.
  • phospholipases A1 and A2 which hydrolyze one fatty acyl group (in the sn-1 and sn-2 position, respectively) to form lysophospholipid
  • lysophospholipase or phospholipase B
  • Phospholipase C and phospholipase D release diacyl glycerol or phosphatidic acid respectively.
  • proteases include those of animal, vegetable or microbial origin. Microbial origin is preferred. Chemically modified or protein engineered mutants are included.
  • the protease may be a serine protease or a metallo protease, preferably an alkaline microbial protease or a trypsin-like protease.
  • Suitable protease enzymes include AlcalaseTM, SavinaseTM, PrimaseTM, DuralaseTM, DyrazymTM, EsperaseTM, EverlaseTM, PolarzymeTM, and KannaseTM, (Novozymes A/S), MaxataseTM, MaxacalTM, MaxapemTM, ProperaseTM, PurafectTM, Purafect OxPTM, FN2TM, and FN3TM (Genencor International Inc.).
  • the method of the invention may be carried out in the presence of cutinase. classified in EC 3.1.1.74.
  • the cutinase used according to the invention may be of any origin.
  • cutinases are of microbial origin, in particular of bacterial, of fungal or of yeast origin.
  • Suitable amylases include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Amylases include, for example, alpha-amylases obtained from Bacillus, e.g. a special strain of B. licheniformis, described in more detail in GB 1,296,839 , or the Bacillus sp. strains disclosed in WO 95/026397 or WO 00/060060 .
  • Suitable amylases are DuramylTM, TermamylTM, Termamyl UltraTM, NatalaseTM, StainzymeTM, FungamylTM and BANTM (Novozymes A/S), RapidaseTM and PurastarTM (from Genencor International Inc.).
  • Suitable cellulases include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Suitable cellulases include cellulases from the genera Bacillus, Pseudomonas, Humicola, Fusarium, Thielavia, Acremonium, e.g. the fungal cellulases produced from Humicola insolens, Thielavia terrestris, Myceliophthora thermophila, and Fusarium oxysporum disclosed in US 4,435,307 , US 5,648,263 , US 5,691,178 , US 5,776,757 , WO 89/09259 , WO 96/029397 , and WO 98/012307 .
  • Cellulases include CelluzymeTM, CarezymeTM, EndolaseTM, RenozymeTM (Novozymes A/S), ClazinaseTM and Puradax HATM (Genencor International Inc.), and KAC-500(B)TM (Kao Corporation).
  • Suitable peroxidases/oxidases include those of plant, bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Examples of useful peroxidases include peroxidases from Coprinus, e.g. from C. cinereus, and variants thereof as those described in WO 93/24618 , WO 95/10602 , and WO 98/15257 . Peroxidases include GuardzymeTM and NovozymTM 51004 (Novozymes A/S).
  • Any enzyme present in the composition may be stabilized using conventional stabilizing agents, e.g., a polyol such as propylene glycol or glycerol, a sugar or sugar alcohol, lactic acid, boric acid, or a boric acid derivative, e.g., an aromatic borate ester, or a phenyl boronic acid derivative such as 4-formylphenyl boronic acid, and the composition may be formulated as described in e.g. WO 92/19709 and WO 92/19708 .
  • a polyol such as propylene glycol or glycerol
  • a sugar or sugar alcohol lactic acid, boric acid, or a boric acid derivative, e.g., an aromatic borate ester, or a phenyl boronic acid derivative such as 4-formylphenyl boronic acid
  • Sequestrants may be present in the detergent particles.
  • coated large detergent particles are manufactured, following the process in PCT/EP2010/055256 .
  • Surfactant raw materials were mixed together to give a 67 wt% active paste comprising 85 parts LAS (linear alkyl benzene sulphonate), 15 parts Nonionic Surfactant.
  • the raw materials used were:
  • the dried surfactant blend dropped onto a chill roll, where it was cooled to less than 30°C.
  • the cooled dried surfactant blend particles were milled using a hammer mill, 2% Alusil® was also added to the hammer mill as a mill aid.
  • the resulting milled material is hygroscopic and so it was stored in sealed containers.
  • the average particle diameter and thickness of samples of the extruded particles were found to be 4.46 mm and 1.13 mm respectively.
  • the standard deviation was acceptably low.
  • Coated particles composition is given in Table 4.
  • coated extruded particles have an excellent appearance due to their high surface smoothness. Without wishing to be bound by theory it is thought that this is because the uncoated particles are larger and more flattened than usual detergent particles and that their core has a much lower solids content than usual (indeed it is free of solid structuring materials, unlike prior art coated extruded particles).
  • the BD container was fitted with a removable collar to extend the height of the container. This extended container was then filled via the poured BD technique. The extended container was then placed on a Retsch Sieve Shaker and allowed to vibrate/tap for 5 min using the 0.2mm/"g" setting on the instrument. The collar was then removed and the excess powder levelled as per the standard BD measurement, the mass of the container measured and the Tapped BD calculated in the usual way.
  • Standard DFR Dynamic Flow Rate
  • a cylindrical glass tube having an internal diameter of 35 mm and a length of 600 mm.
  • the tube is securely clamped with its longitudinal axis vertical. Its lower end is terminated by means of a smooth cone of polyvinyl chloride having an internal angle of 15 DEG and a lower outlet orifice of diameter 22.5 mm.
  • a beam sensor is positioned 150 mm above the outlet, and a second beam sensor is positioned 250 mm above the first sensor.
  • the outlet orifice is temporarily closed, for example, by covering with a piece of card, and detergent composition is poured into the top of the cylinder until the detergent composition level is about 100 mm above the upper sensor.
  • the outlet is then opened and the time t (seconds) taken for the detergent composition level to fall from the upper sensor to the lower sensor is measured electronically.
  • the DFR is the tube volume between the sensors, divided by the time measured.
  • the DFR of the uncoated crystals was worse than the smaller spherical coated particles under both tests (tapped and untapped). Uncoated crystals do however, flow much better than the uncoated prior art powders. It is thus feasible to use a small proportion of uncoated crystals in the composition, say up to 30% of the total particles, preferably up to 15% by number.
  • the coated crystals despite their superior appearance to the uncoated crystals have a lower DFR then the uncoated ones, hence the coating is improving appearance but not the flow.
  • the coated crystals do have a very consistent DFR. They seem to flow the same way reliably no matter what their history.
  • a dispenser 1 is shown, the dispenser 1 for dispensing a blister pack 3 of predetermined doses 5 of concentrated laundry composition according to any of the examples above, into a washing machine (not shown).
  • the dispenser 1 comprises a rigid support frame 7 on which is mounted the blister pack 3 whereby manual force on a selected dose ejects that dose 5 from the blister pack 3.
  • the blister pack comprises a planar sheet of plastic provided with individual reservoirs comprising "blisters" 5 which are concave protrusions configured in rows and columns.
  • the blister pack 3 further comprises at least one backing layer (not shown) which is fastened to the solid receiving side of the blister pack. This layer is a low strength retaining layer.
  • This low strength retaining layer stretches across the backs of the blisters 5 and retains the individually sealed within each of the blisters 5.
  • the blister pack 3 is mounted with the low strength retaining layer facing down.
  • the package is sufficiently rigid in material and/or construction such that a portion e.g. the base or a side wall, can be tapped to move the particles from the reservoir/s and preferably such tapping creates audible feedback to the user to guide them as to the movement of the particles.
  • Suitable materials for the package include, but are not limited to: polypropylene (PP), polyethylene (PE), polycarbonate (PC), polyamides (PA) and/or polyethylene terephthalate (PETE), polyvinylchloride (PVC); and polystyrene (PS).
  • the reservoirs may formed by moulding e.g. blow moulding from a preform or by thermoforming or by injection moulding.
  • Figure 3 shows an exploded view of the dispenser being installed into the drawer 11 of an automatic washing machine (machine not shown).
  • the drawer 11 is provided with a plurality of separate compartments and the dispenser is being installed into the middle compartment 11, for containing main wash products to be flushed by an incoming water flow (not shown) into the machine drum.
  • the dispenser 1 is installed in a machine drawer so manual force on a selected dose ejects this dose from the blister pack directly into the drawer compartment 13.
  • the rigid support frame 7 comprises apertures 15 in each wall.
  • the frame 7 also has smooth contours 17 and generally convex rather than concave surfaces configuration/patterning such that water and/or laundry composition cannot become trapped.
  • the dispensing device is an injection moulded plastic, water insoluble and of robust construction so that removal during the washing process is not required.
  • the dispenser may be constructed of any suitable material such as a water insoluble material such as a polyolefin e.g. polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET).
  • PP polypropylene
  • PE polyethylene
  • PET polyethylene terephthalate
  • the frame has sufficient rigidity to withstand the manual force required to break the blister pack but has elasticity at higher manual forces in that the walls 7 a can be flexed against the sides 13 a of the drawer compartment during fitting. Once in place, manual pressure is released so as to urge the walls 7 a against the sides 13 a of the drawer compartment 13, thereby preventing movement of the dispensing device 1 whilst in place in the drawer 11.
  • the frame 7 comprises a wall or walls having supporting upper edges 17 which correspond to an outer perimeter of the blisters 5 so that the pack is supported further.
  • the support frame has an upper supporting edge 19 which is inclined with respect to the base 21, whereby the mounted blister pack 3 is also inclined. With this arrangement, the blister pack 3 may be better viewed by the user.
  • the device is removable, however, it may contain temporary means of retaining the device in place for a single or multiple washes such as flexible walls as referred to above but also adhesive .

Claims (5)

  1. Produit emballé comprenant un emballage comprenant plusieurs réservoirs individuels, chacun des réservoirs contenant une dose prédéterminée d'une lessive particulaire concentrée dans lequel au moins 70 % en nombre des particules de la composition comprenant un noyau dur de tensioactif élevé et un revêtement et dans lequel toutes les particules revêtues sont non sphériques et chaque particule revêtue présente des dimensions perpendiculaires x, y et z, où x est de 0,2 à 2 mm, y est de 2,5 à 8 mm (de préférence de 3 à 8 mm), et z est de 2,5 à 8 mm (de préférence de 3 à 8 mm) et dans lequel l'emballage est rigide en matériau et/ou en construction de sorte qu'une partie par exemple la base ou une paroi latérale, peut être tapotée pour déplacer les particules du(des) réservoir(s) de sorte que le tapotement crée un retour audible à l'utilisateur pour les guider vers le mouvement des particules et en ce que le ou chaque réservoir comprend une portion transparente.
  2. Produit emballé selon l'une quelconque des revendications précédentes, dans lequel l'emballage comprend un plateau de creux individuels, chaque creux fournissant un réservoir individuel recouvert par un couvercle.
  3. Produit emballé selon l'une quelconque des revendications précédentes, dans lequel le produit emballé comprend une feuille plane avec des blisters ou des saillies concaves et une couche de conservation fixée à la feuille plane, ladite couche de conservation étant de faible résistance.
  4. Produit emballé selon l'une quelconque des revendications précédentes, dans lequel la ou chaque partie transparente comprend au moins une partie de la base du réservoir, de sorte que la composition contenue à l'intérieur est visible lorsque l'on regarde la base.
  5. Procédé de lavage de textiles dans un lave-linge, avec un emballage selon les revendications 1-4, le procédé comprenant l'étape de pression manuelle sur une dose dans un réservoir pour éjecter la dose du réservoir.
EP11764218.1A 2010-10-14 2011-10-05 Emballage comprenant une composition de lessive, et procédé de lavage au moyen de l'emballage Active EP2627577B1 (fr)

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EP10187496 2010-10-14
EP11764218.1A EP2627577B1 (fr) 2010-10-14 2011-10-05 Emballage comprenant une composition de lessive, et procédé de lavage au moyen de l'emballage
PCT/EP2011/067387 WO2012049053A1 (fr) 2010-10-14 2011-10-05 Emballage comprenant une composition de lessive, distributeur d'emballage et procédé de lavage au moyen du distributeur et de l'emballage

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EP2627577A1 EP2627577A1 (fr) 2013-08-21
EP2627577B1 true EP2627577B1 (fr) 2016-06-15

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Publication number Publication date
EP2627577A1 (fr) 2013-08-21
ZA201302294B (en) 2014-06-25
CN103153813B (zh) 2015-08-19
BR112013008991A2 (pt) 2016-07-05
BR112013008991B1 (pt) 2020-12-29
WO2012049053A1 (fr) 2012-04-19
CN103153813A (zh) 2013-06-12
ES2591003T3 (es) 2016-11-24

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