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EP3649057B1 - Emballage hydrosoluble - Google Patents

Emballage hydrosoluble Download PDF

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Publication number
EP3649057B1
EP3649057B1 EP18734250.6A EP18734250A EP3649057B1 EP 3649057 B1 EP3649057 B1 EP 3649057B1 EP 18734250 A EP18734250 A EP 18734250A EP 3649057 B1 EP3649057 B1 EP 3649057B1
Authority
EP
European Patent Office
Prior art keywords
water
soluble
substrate
package
composition
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.)
Active
Application number
EP18734250.6A
Other languages
German (de)
English (en)
Other versions
EP3649057A1 (fr
Inventor
Rohit Kumar
Venkata Satyanarayana Murthy Kamsu
James Milton ROSSMAN
Thomas Frank SPENADER
Richard Charles FIELDER
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 Global IP Ltd
Unilever IP Holdings BV
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
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Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Priority claimed from PCT/EP2018/067926 external-priority patent/WO2019007945A1/fr
Publication of EP3649057A1 publication Critical patent/EP3649057A1/fr
Application granted granted Critical
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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
    • C11D17/042—Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3753—Polyvinylalcohol; Ethers or esters thereof
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/12—Soft surfaces, e.g. textile
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces

Definitions

  • the present invention relates to a water-soluble package, and more particularly to a water-soluble package having a foamed water-soluble substrate, which substrate includes a surfactant.
  • Water-soluble package known in the art typically encloses a cleaning or a treatment composition, such as a dishwashing or a laundry detergent composition enclosed in a water-soluble substrate that is in the form of a film, sachet, bag and other types of container or capsule.
  • the water-soluble package is commonly used to simplify dispersing, pouring, dissolving and dosing of the composition.
  • a consumer can directly add the package to a mixing vessel, such as a bucket, sink or washing machine.
  • a mixing vessel such as a bucket, sink or washing machine.
  • This provides for accurate dosing while eliminating the need for the consumer to measure the composition.
  • the package may also reduce mess that would be associated with dispensing a similar composition from a storage container, such as pouring a liquid laundry detergent from a bottle.
  • the package also insulates the composition therein from contact with the user's hands.
  • water-soluble package containing pre-measured composition provide for convenience of consumer use in a variety of applications.
  • the water-soluble package in the form of a package, capsule or container is generally formed by sealing a water-soluble substrate to enclose a composition within.
  • release of the contents of such water-soluble package must be quick and the water-soluble substrate enclosing the contents must dissolve completely during use in water, and without leaving a residue.
  • a typical problem encountered by consumers is incomplete dissolution of the water-soluble package when added in the detergent drawer of a washing machine. This problem is especially predominant when the washing machine is utilising cold water for washing purpose.
  • the water-soluble substrate is often thin, and designed to provide high water solubility or reactivity.
  • PVOH based thermoplastic films such as M8630 from MonoSol LLC are plasticized cold-water soluble film based on a medium molecular weight fully hydrolysed PVOH having carboxylate groups.
  • the film has a thickness of 75 microns and a weight of about 98g/m 2 .
  • water-soluble films that completely dissolve in cold water are known, they can be too sensitive to moisture and humidity to make package for containing consumer products such as cleaning composition or treatment compositions. High humidity or water droplets from handling of the package with wet hands can cause the water-soluble package to stick together and/or dissolve through the package and cause leakage of package contents.
  • US8309203 B2 (The Procter & Gamble Company, 2012) describes a water-soluble substrate which have improved resistance to dissolution prior to being immersed in water by providing water-insoluble particles partially embedded in said water-soluble substrate.
  • the water-soluble substrate has a basis weight of from 33 to 167 grams per square metres and a thickness ranging from 25 micrometres to about 125 micrometres.
  • the water-soluble substrate may have surfactants incorporate in amounts ranging from about 0.01 wt% to about 1 wt%.
  • the water-soluble substrate may have to be so thin that in addition to being sensitive to moisture and humidity the mechanical properties including those relating to process-ability and heat- sealability may also be compromised.
  • the water-soluble substrate For preparing a package from the water-soluble substrate, it is desired that the water-soluble substrate must exhibit flexibility, that is, ability to accept a crease without cracking or becoming seriously weakened, in order to be useful.
  • foamed water-soluble substrate having a thickness from 30 micrometres to 250 micrometres may provide improvement in cold-water solubility but are extremely susceptible to small amounts of moisture and atmospheric humidity, it is also desired that the foamed water-soluble substrate have a good bubble stability.
  • water-soluble package including a foamed water-soluble substrate which substrate has a film forming material and low levels of a surfactant preferably an anionic surfactant, still preferably an alkyl sulphate anionic surfactant which enables creating and stabilizing a foam structure in the water-soluble substrate.
  • a surfactant preferably an anionic surfactant, still preferably an alkyl sulphate anionic surfactant which enables creating and stabilizing a foam structure in the water-soluble substrate.
  • Presence of low levels of surfactant in the foamed structure of the water-soluble substrate provides the substrate with desirable flexibility required for preparing consumer packages. Further such substrate is also thicker than dense films at the same weight per unit area due to the presence of the stable bubbles which enables them to exhibit good process-ability while maintaining good cold-water solubility.
  • a water-soluble package for holding a unit dose composition comprising a water-soluble substrate having a thickness from 30 micrometres to 250 micrometres, said substrate including a film-forming material and 0.2 to 5wt% surfactant wherein the substrate has uniformly dispersed therein gas bubbles having an average diameter less than the total thickness of the substrate.
  • a second aspect of the present invention disclosed is use of the water-soluble package of the first aspect for washing dishes, treating textiles or laundering textiles.
  • a water-soluble package for holding a unit dose composition
  • the water-soluble package comprising a water-soluble substrate having a thickness from 30 micrometres to 250 micrometres, said substrate comprising:(i). a film-forming material; and, (ii). 0.2 to 5wt% surfactant; wherein the substrate has uniformly dispersed therein gas bubbles having an average diameter less than the total thickness of the substrate.
  • Water-soluble package means any package construction that is suitable for enclosing and/or containing a composition or material, such as a dishwashing or laundry detergent composition or fabric treatment composition.
  • the water-soluble package can be in any packaging form, such as film packaging, capsules, bag, sachets and containers.
  • the water-soluble package is a single dose water-soluble package.
  • water-soluble not only refers to a structure that is totally water-soluble, but also includes those that are substantially water-soluble but have some material(s) in the water-soluble structure that are not water-soluble; structure which are water soluble at different temperature conditions or different pH conditions and also refers to structure which are water-dispersible or water-disintegrable.
  • the water-soluble package typically contains at least one compartment for containing the composition.
  • the water-soluble package includes two or more compartments.
  • Each compartment can contain same composition or a different composition from the one in another compartment.
  • each compartment may contain a different component (or mixture of components) of a composition from another compartment.
  • the water-soluble package may contain two compartments wherein each compartment is a different mixture of components together constituting a laundry cleaning composition, fabric treatment composition or dishwashing composition.
  • the water-soluble package includes a water-soluble substrate preferably enclosing and/or containing a composition or material.
  • the water-soluble substrate may dissolve in water to release the material or composition enclosed within the substrate.
  • Such materials and compositions particularly include, but are not limited to, detergent compositions, such as dishwashing composition, laundry detergent composition or fabric treatment composition.
  • the material or composition may be any of solid, granular, gel, particulate, tablet or liquid form.
  • the material or composition is a powder, particulate, tablet or granular form.
  • the water-soluble package may be designed as a dimensionally stable receptacle, for example in the form of a capsule, box, or container. It is also possible and preferred to form the water-soluble package as a non-dimensionally stable container, for example as a pouch or sachet.
  • the shape of this type of water-soluble package may be adapted to a great extent to the use conditions. Various shapes such as tubes, cushions, cylinders, bottles, or disks are suitable.
  • the water-soluble package of the invention is conveniently in the form of a pouch, bag or sachet.
  • Such a sachet may be formed from one or more film or sheets of the water-soluble substrate or from a tubular section of such substrate, but it is most conveniently formed from a single folded sheet or from two sheets, sealed together at the edge regions either by means of an adhesive or, preferably, by heat-sealing.
  • a preferred form of sachet according to the invention is a rectangular one formed from a single folded sheet of the water-soluble substrate sealed on three sides, although the sachet may be of any shape or size known in the art.
  • Preferred methods of sealing include heat sealing, solvent welding, and solvent or wet sealing. It is preferred that only the area that is to form the seal, is treated with heat or solvent.
  • the heat or solvent can be applied by any method, preferably on the closing material, preferably only on the areas, which are to form the seal. If solvent or wet sealing or welding is used, it may be preferred that heat is also applied.
  • Preferred wet sealing or solvent sealing/welding methods include selectively applying solvent onto the area between the moulds, or on the closing material, by for example, spraying or printing this onto these areas, and then applying pressure onto these areas, to form the seal.
  • the formed pouches can then be cut by a cutting device.
  • Cutting can be done using any known method. It may be preferred that the cutting is also done in continuous manner, and preferably with constant speed and preferably while in horizontal position.
  • the cutting device can, for example, be a sharp item or a hot item, whereby in the latter case, the hot item 'burns' through the film/sealing area.
  • Disclosed water-soluble package includes a water-soluble substrate which substrate typically forms a wall or walls of the water-soluble package for enclosing a composition.
  • the water-soluble substrate can be in the form of a foamed film or a foamed sheet.
  • the water- soluble substrate may be in the form of woven, non-woven or cast structures.
  • Preferably the water-soluble substrate is thermoplastic.
  • the water-soluble substrate has a thickness ranging from 30 micrometres to 250 micrometres.
  • the thickness of the water-soluble substrate is at least 50 micrometres, still preferably at least 60 micrometres, further preferably at least 65 micrometres and most preferably at least 75 micrometres, but typically not more than 180 micrometres, still preferably not more than 170 micrometres and most preferably not more than 150 micrometres.
  • Preferred water-soluble substrate has a thickness ranging from 75 micrometres to 150 micrometres.
  • the water-soluble substrate has a basis weight in the range from 30 grams per square metre to 70 grams per square metre, more preferably the basis weight in the range from 35 grams per square metre to 50 grams per square metre.
  • the basis weight of the water-soluble substrate is at least 32 grams per square metre, still preferably at least 34 grams per square metre, most preferably at least 35 grams per square metre, but typically not more than 60 grams per square metre, still preferably not more than 65 grams per square metre and most preferably not more than 50 grams per square metre.
  • the water-soluble substrate according to the present invention is a foamed structure having dispersed therein gas bubbles.
  • the average diameter of the gas bubbles is less than the total thickness of the substrate.
  • the volume of gas bubbles in the substrate is from 80% to 99% of the volume of the substrate, more preferably 85% to 95% of the volume of the substrate.
  • the water-soluble substrate includes a film-forming material.
  • Film-forming material refers to a material that by itself or in combination with a co-reactive material, such as a crosslinking agent, is capable of forming a self-supporting continuous film on a surface upon curing and preferably includes polymeric material that upon removal of any solvents or carriers present in the polymer emulsion, dispersion, suspension or solution, can coalesce to form a film on at least a horizontal surface and is capable of curing into a continuous film.
  • Such film-forming material preferably includes a polymer or monomer capable of producing a polymer material that exhibits properties suitable for making a film or a sheet, or a foam, such as by casting, blow-moulding, extrusion or blown extrusion of the material, as is well known in the art.
  • Preferred film-forming material are polymeric material, preferably polymers which are capable of being formed into a foamed film or a foamed sheet.
  • the polymeric material can, for example, be formed into a film or sheet by casting, blow-moulding, extrusion or blown extrusion of the polymeric material, as known in the art.
  • Suitable film-forming material are known and includes any water-soluble polymer or mixtures of polymers.
  • the water-soluble substrate may include one or more film-forming materials.
  • film-forming material includes polymers, copolymers or derivatives thereof and are selected from polyvinyl alcohol, modified polyvinyl alcohol, polyvinyl acetate, polycarboxylic acids and salts, polyacrylates, water-soluble acrylate copolymers, polyamino acids or peptides, polyamides, polylactic acid, polyaminopropyl sulfonic acid and salts thereof, polyitaconic acid and salts thereof, polyacrylamides, polyalkylene oxides, polyvinylpyrrolidone, pullalan, cellulosics (cellulose, cellulose ethers, cellulose esters, cellulose amides and includes examples such as carboxy methylcellulose and hydroxypropyl methylcellulose), water-soluble natural polymers (such as guar gum, xanthan gum, carrageenan and starch
  • More preferred polymers are selected from polyacrylates and water-soluble acrylate copolymers, methylcellulose, carboxy methylcellulose sodium, dextrin, ethylcellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose, maltodextrin, polymethacrylates.
  • the film-forming material includes polyvinyl alcohol, polyvinyl alcohol copolymers, partially hydrolysed polyvinyl acetate, modified polyvinyl alcohol preferably modified with a carboxyl group, vinylamide monomer and/or a sulfonic acid group or other functional groups known in the art to improve the solubility in water, polyvinyl acetate, polyvinyl pyrrolidone, carboxy methylcellulose or hydroxypropyl methyl cellulose.
  • the film-forming material includes or consists essentially of vinyl polymers, including homo-polymers and copolymers having hydroxyl or carboxyl groups.
  • Preferred polymers include polyvinyl alcohol, polyvinyl acetate, partially hydrolysed polyvinyl acetate, modified polyvinyl alcohol or mixtures thereof.
  • Polyvinyl alcohol, polyvinyl acetate and modified polyvinyl alcohols can provide stable water-soluble substrate that have suitable dissolution rates.
  • the film-forming material in the water-soluble substrate is a PVOH.
  • Mixtures of polymers can also be used as the film-forming material. This can be beneficial to control the mechanical and/or dissolution properties of the package, depending on the application thereof and the required needs.
  • Suitable mixtures include for example mixtures wherein one polymer has a higher water-solubility than another polymer, and/or one polymer has a higher mechanical strength than another polymer.
  • mixtures of polymers having different weight average molecular weights for example a mixture of polyvinyl alcohol or a copolymer thereof of a weight average molecular weight of about 10,000 to 40,000, preferably around 20,000, and of poly vinyl alcohol or copolymer thereof, with a weight average molecular weight of about 100,000 to 300,000, preferably around 150,000.
  • the film forming material is a polymer having a weight average molecular weight of from 1000 to 1x10 6 , preferably from 1x10 4 to 3x10 5 , yet preferably from 20,000 to 1.5X10 5 .
  • the level of film forming material in the water-soluble substrate is at least 40 wt%, still preferably at least 50 wt%, further preferably at least 55 wt% and most preferably at least 65 wt%, but typically not more than 85wt%, still preferably not more than 80 wt% and most preferably not more than 75 wt%.
  • the film-forming material is preferably a polymer that is hydrolyzed.
  • the polymer is partially hydrolysed, more preferably the polymer has a degree of hydrolysis ranging from 60% to 99%, preferably 60% to 98%, still preferably in the range from 60% to 90%, further preferably in the range from 65% to 85% and most preferably from 75% to 85%. Most preferably the degree of hydrolysis is between 75% to 80%.
  • the film-forming material is a hydrolysed polyvinyl acetate preferably having a degree of hydrolysis from 60% to 90%.
  • the process for preparing a water-soluble substrate from a film-forming material involves a step of blowing or casting the film-forming material or a solution thereof, preferably the water-soluble substrate is produced by a casting process.
  • Disclosed water-soluble substrate includes 0.2 to 5wt% surfactant.
  • the desired level of surfactant according to the present invention in the water-soluble substrate provides stability to the dispersed gas bubbles in the foamed water-soluble substrate and improves the flexibility and heat seal-ability of the substrate enabling the substrate to be advantageously used for preparing a package for holding a composition or material which must be released.
  • the amount of surfactant in the water-soluble substrate is at least 0.25 wt%, still preferably at least 0.3wt%, further preferably at least 0.4wt% and most preferably at least 0.45wt%, but typically not more than 4wt%, still preferably not more than 3.5 wt%, further preferably not more than 3wt% and most preferably not more than 2 wt%.
  • Suitable surfactants may include the anionic, nonionic, cationic, amphoteric and zwitterionic classes or mixtures thereof.
  • Suitable surfactants include, but are not limited to, polyoxyethylenated polyoxypropylene glycols, alcohol ethoxylates, alkylphenol ethoxylates, tertiary acetylenic glycols and alkanolamides (nonionics), polyoxyethylenated amines, quaternary ammonium salts and quaternized polyoxyethylenated amines (cationics), and amine oxides, N-alkylbetaines and sulfobetaines (zwitterionics).
  • the surfactant is an anionic surfactant selected from straight chain or branched alkyl sulfates, sulfonate surfactant, alkyl polyalkoxylated sulfates, also known as alkyl ether sulfates such surfactants may be produced by the sulfation of higher Cs-C 20 fatty alcohols or mixtures thereof.
  • Examples of primary alkyl sulfate surfactants are those of formula: ROSO 3 - M + wherein R is a linear C 8 -C 20 hydrocarbyl group and M is a water-solubilising cation.
  • R is C 10 -C 16 alkyl, for example C 12 -C 14
  • M is an alkali metal such as lithium, sodium or potassium.
  • secondary alkyl sulfate surfactants are those which have the sulfate moiety on a "backbone" of the molecule, for example those of formula: CH 2 (CH 2 ) n (CHOSO 3 - M + )(CH 2 ) m CH 3 wherein m and n are independently 2 or more, the sum of m+n typically being 6 to 20, for example 9 to 15, and M is a water-solubilising cation such as lithium, sodium or potassium.
  • Especially preferred secondary alkyl sulfates are the (2,3) alkyl sulfate surfactants of formulae: CH 2 (CH 2 ) x (CHOSO 3 - M+)CH 3 and CH 3 (CH 2 ) x (CHOSO 3 - M + )CH 2 CH 3 for the 2-sulfate and 3-sulfate, respectively.
  • x is at least 4, for example 6 to 20, preferably 10 to 16.
  • M is cation, such as an alkali metal, for example lithium, sodium or potassium.
  • alkoxylated alkyl sulfates are ethoxylated alkyl sulfates of the formula: RO(C 2 H 4 O) n SO 3 - M + wherein R is a C 8 -C 20 alkyl group, preferably C 10 -C 18 such as a C 12 -C 16 , n is at least 1, for example from 1 to 20, preferably 1 to 15, especially 1 to 6, and M is a salt-forming cation such as lithium, sodium, potassium, ammonium, alkylammonium or alkanolammonium. These compounds can provide especially desirable fabric cleaning performance benefits when used in combination with alkyl sulfates.
  • alkyl sulfates and alkyl ether sulfates will generally be used in the form of mixtures comprising varying alkyl chain lengths and, if present, varying degrees of alkoxylation.
  • anionic surfactants which may be employed are salts of fatty acids, for example C 8 -C 18 fatty acids, especially the sodium or potassium salts, and alkyl, for example C 8 -C 18 , benzene sulfonates.
  • the anionic surfactant is a sulphated anionic surfactant, preferably the alkali metal salt of lauryl sulphate, still preferably sodium lauryl sulphate.
  • the sulphated anionic surfactant preferably the sodium lauryl sulphate is included in the foamed water-soluble substrate at a level ranging from 0.2% to 5%, more preferably from 0.25% to 2%, still preferably from 0.4% to 1% by weight of the water-soluble substrate.
  • non-ionic surfactants are fatty acid alkoxylates, such as fatty acid ethoxylates, especially those of formula: R(C 2 H 4 O) n OH wherein R is a straight or branched C 8 -C 16 alkyl group, preferably a C 9 -C 15 , for example C 10 -C 14 , alkyl group and n is at least 1, for example from 1 to 16, preferably 2 to 12, more preferably 3 to 10.
  • the alkoxylated fatty alcohol non-ionic surfactant will frequently have a hydrophilic-lipophilic balance (HLB) which ranges from 3 to 17, more preferably from 6 to 15, most preferably from 10 to 15.
  • HLB hydrophilic-lipophilic balance
  • fatty alcohol ethoxylates are those made from alcohols of 12 to 15 carbon atoms and which contain about 7 moles of ethylene oxide. Such materials are commercially marketed under the trademarks Neodol 25-7 and Neodol 23-6.5 by Shell Chemical Company.
  • Other useful Neodols include Neodol 1-5, an ethoxylated fatty alcohol averaging 11 carbon atoms in its alkyl chain with about 5 moles of ethylene oxide; Neodol 23-9, an ethoxylated primary C 12 -C 13 alcohol having about 9 moles of ethylene oxide; and Neodol 91-10, an ethoxylated C 9 -C 11 primary alcohol having about 10 moles of ethylene oxide.
  • Dobanol 91-5 is an ethoxylated C 9 -C 11 fatty alcohol with an average of 5 moles ethylene oxide
  • Dobanol 25-7 is an ethoxylated C 12 -C 15 fatty alcohol with an average of 7 moles of ethylene oxide per mole of fatty alcohol.
  • Suitable ethoxylated alcohol non-ionic surfactants include Tergitol 15-S-7 and Tergitol 15-S-9, both of which are linear secondary alcohol ethoxylates available from Union Carbide Corporation.
  • Tergitol 15-S-7 is a mixed ethoxylated product of a C 11 -C 15 linear secondary alkanol with 7 moles of ethylene oxide and Tergitol 15-S-9 is the same but with 9 moles of ethylene oxide.
  • Neodol 45-11 is a ethylene oxide condensation products of a fatty alcohol having 14-15 carbon atoms and the number of ethylene oxide groups per mole being about 11. Such products are also available from Shell Chemical Company.
  • non-ionic surfactants are, for example, C 10 -C 18 alkyl polyglycosides, such as C 12 -C 16 alkyl polyglycosides, especially the polyglucosides. These are especially useful when high foaming compositions are desired.
  • Further surfactants are polyhydroxy fatty acid amides, such as C 10 -C 18 N-(3-methoxypropyl) glycamides and ethylene oxide-propylene oxide block polymers of the Pluronic type.
  • cationic surfactants are those of the quaternary ammonium type.
  • the water-soluble substrate includes a plasticizer.
  • plasticizer includes, but is not limited to glycerol, glycerin, diglycerin, hydroxypropyl glycerine, sorbitol, methylene glycol diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, polyethylene glycols, neopentyl glycol, trimethylolpropame, polyether polyols, ethanolamines, and mixtures thereof.
  • the plasticizer when present, may be included in the water-soluble substrate material in an appropriate amount, as generally known.
  • the plasticizer is a combination of glycerin and polyethylene glycol.
  • the water-soluble package of the present invention can be manufactured using standard known techniques.
  • the water-soluble substrate is typically formed (preferably thermoformed) into a water-soluble substrate enclosure (e.g. a film pocket, open capsule or container).
  • the water-soluble substrate enclosure may then be filled with a composition such as a dishwashing or laundry detergent composition or fabric treatment composition.
  • the fabric treatment composition may be a post-wash treatment composition, preferably added at the rinse stage or a pretreatment composition.
  • the water-soluble enclosure containing the composition or material can then be sealed, for example by sealing the edges of the enclosure or joining the enclosure with one or more additional pieces of water-soluble substrate, in order to enclose the material or composition in the water-soluble package.
  • the water-soluble package holding the composition may be in the form of a single- and multiple-compartment pouch, sachets, bags etc.
  • Water-soluble package and other such containers that incorporate the water-soluble substrate described herein can be made in any suitable manner known in the art.
  • processes for making water-soluble package include but are not limited to processes known in the art as: vertical form-fill-sealing processes, horizontal form-fill sealing processes, and formation of the package in molds on the surface of a circular drum.
  • a vertical tube is formed by folding a substrate. The bottom end of the tube is sealed to form an open package. This package is partially filled allowing a head space. The top part of the open package is then subsequently sealed together to close the package, and to form the next open package. The first package is subsequently cut, and the process is repeated.
  • the package formed in such a way usually have pillow shape.
  • Horizontal form-fill sealing processes uses a die having a series of molds therein.
  • a substrate is placed in the die and open package are formed in these molds, which can then be filled, covered with another layer of substrate, and sealed.
  • a substrate is circulated over the drum and pockets are formed, which pass under a filling machine to fill the open pockets.
  • the filling and sealing takes place at the highest point (top) of the circle described by the drum, e.g. typically, filling is done just before the rotating drum starts the downwards circular motion and sealing just after the drum starts its downwards motion.
  • the water-soluble substrate can initially be molded or formed into the shape of an open package using thermoforming, vacuum-forming, or both.
  • Thermoforming involves heating the molds and/or the substrate by applying heat in any known way such as contacting the molds with a heating element, or by blowing hot air or using heating lamps to heat the molds and/or the substrate.
  • vacuum assistance is employed to help drive the substrate into the mold.
  • the two techniques can be combined to form package, for example, the substrate can be formed into open package by vacuum-forming, and heat can be provided to facilitate the process.
  • the open package is then filled with the composition to be contained therein.
  • the filled, open package are then closed, which can be done by any method.
  • the closing is done by continuously feeding a second material or substrate, such as a water-soluble substrate, over and onto the web of open pouches and then sealing the first substrate and second substrate together.
  • the first and second substrates are typically sealed in the area between the molds, and, thus, between the package that are being formed in adjacent molds.
  • the sealing can be done by any method. Methods of sealing include heat sealing, solvent welding, and solvent or wet sealing.
  • the sealed webs of package can then be cut by a cutting device, which cuts the package in the web from one another, into separate package.
  • the water-soluble package of the present invention comprises a composition which composition may be a fabric treatment composition or a fabric cleaning composition that may be utilized in a method for treating a fabric article.
  • the method of treating a fabric article with the water-soluble package may comprise one or more steps selected from the group consisting of: (a) pre-treating the fabric article in a liquor formed by contacting the water-soluble package enclosing a pretreatment composition with water before washing the fabric article; (b) laundering the fabric article with a wash liquor formed by contacting the water soluble package enclosing a cleaning composition with water; (c) contacting the fabric article with the water soluble package enclosing a post-wash treatment composition after the laundering process; and (d) combinations thereof.
  • the method may comprise the step of selecting of only a portion of the water-soluble package for use in treating a fabric article.
  • the desired portion or compartment of the water-soluble package may be cut and/or torn away and either placed on or adhered to the fabric or placed into water to form a relatively small amount of wash liquor which is then used to pre-treat or give a post laundering treatment to the fabric.
  • the user may customize the fabric treatment method according to the task at hand.
  • at least a portion of a water-soluble package may be applied to the fabric to be treated using a device like a brush or a sponge.
  • the water-soluble package may be applied directly to the surface of the fabric. Any one or more of the aforementioned steps may be repeated to achieve the desired fabric treatment benefit.
  • disintegrants are preferably applied on the surface of the water-soluble substrate or they may be applied integrated into the water-soluble substrate or any combination thereof, in order to speed up the dissolution when the water-soluble substrate is immersed in water.
  • the level of disintegrant is from 0.1 to 30%, preferably from 1 to 15%, by weight of said water-soluble substrate.
  • Any suitable disintegrant known in the art may be used.
  • Preferred disintegrants for use herein include corn/potato starch, methyl cellulose/celluloses, mineral clay powders, cross-linked cellulose, cross-linked polymer, cross-linked starch.
  • Suitable release agents include, but are not limited to, fatty acids and their salts, fatty alcohols, fatty esters, fatty amines, fatty amine acetates and fatty amides.
  • the release agent can be incorporated in the water-soluble substrate in any suitable amount including amounts within the range of from about 0.02% to about 1.5% by weight, or in the range of from about 0.04% to about 0.15% by weight.
  • compositions may also include suitable extenders, anti-blocking agents, detackifying agents include, but are not limited to: starches, modified starches, crosslinked polyvinylpyrrolidone, crosslinked cellulose, microcrystalline cellulose, and metallic oxides.
  • the extender, antiblocking agent, detackifying agent can be present in the water-soluble substrate in any suitable amount including amounts in the range of from about 0.1% to about 25% by weight, preferably in the range of from about 1% to about 15% by weight.
  • the composition in the water-soluble package may be any composition that is intended to be directly dosed preferably into a washing machine when the package dissolves or disintegrates.
  • the composition may, for example, be a fabric treatment or fabric laundering, surface care or dishwashing composition. Thus, for example, it may be a dishwashing, water-softening composition, laundry or detergent composition, a rinse-treatment composition, fabric-conditioning composition or pretreatment composition.
  • the composition may be in any form and not limited to powder, granular, tablet, particulate or a combination thereof.
  • Suitable composition is generally packaged in amounts of from 0.5 to 100g, preferably from 5 to 100g, especially from 15 to 40g.
  • a laundry composition may weight from 0.5 to 40 g preferably from 15 to 40g.
  • Most preferably the amount of composition enables the user to unit dose the composition for each wash cycle of the washing machine or for pre-treatment or rinse-treatment of the textile.
  • Example 1 Water-soluble substrate having polyvinyl alcohol and surfactant
  • a water-soluble substrate according to the present invention was prepared by mixing the ingredients as disclosed in the Table 1 below in a silverson mixer and also nitrogen gas was purged to introduce gas bubbles.
  • the mixture obtained was cast on a casting belt having a wet film thickness of around 380 microns to 750 microns, thereafter the cast mixture was dried in an oven to provide a film reel which had a final thickness of around 75 micrometer to 200 micrometres.
  • Table 1 Composition of the water-soluble substrate Ingredients Concentration (wt%) Partially hydrolysed polyvinyl alcohol 64 Polyethylene glycol 3.8 glycerine 2.2 Sodium lauryl sulphate 0.45 Other ingredients 10 Balance 100
  • the water-soluble substrate having the composition provided in table 1 that includes a surfactant (sodium lauryl sulphate) within the claimed ranges was found to have stable gas bubbles dispersed in the structure and was also soluble in cold water at a temperature of 10°C.
  • a surfactant sodium lauryl sulphate
  • Example 2 Evaluation of water-soluble substrate having different types of surfactant and without surfactant.
  • a comparative water-soluble substrate (Ex A) was prepared by mixing the ingredients as disclosed in the Table 2 below in a silverson mixer along with incorporation of air with vigorous mixing to obtain a solution with a density of 0.67 grams/mL. In the next step the mixture obtained was cast on a casting belt having a wet film thickness of 380 micrometres, thereafter the cast mixture was dried in an oven to provide a film reel.
  • the water-soluble substrate obtained had a moisture content was 3.1wt%.
  • a water-soluble substrate (Ex 2) according to the present invention was prepared by mixing the ingredients as disclosed in the Table 2 below in a silverson mixer and the solution obtained had a solution density of 0.69 grams/mL. In the next step the mixture obtained was cast on a casting belt having a wet film thickness of 380 micrometres, thereafter the cast mixture was dried in an oven to provide a film reel. The water-soluble substrate obtained had a moisture content was 2.5wt%.
  • the composition of the prepared water-soluble substrate as described above are given in Table 2.
  • the two water-soluble substrates were evaluated for heat seal-ability and the film strength, solubility in water and the details are provided in the Table 2.
  • Table 2 Ingredients Ex A (wt%) Ex 2 (wt%) Partially hydrolysed polyvinyl alcohol 69.3 76.5 Polyethylene glycol (PEG-600) 3.8 3.8 Glycerin 2.2 2.2 Anionic surfactant (SLES 3EO) 0 3.8 Microcrystalline cellulose (MCC) 24.7 13.7 Film strength Poor Fair Heal seal @ 150°C Low, seal tears at seal line. Film brittle and crumbles Good, film seals and does not crumble. Solubility in cold water @ 5°C Completely dissolved in 270 seconds Completely dissolved in 131 seconds Bubble stability Bubble collapsed immediately after agitation was stopped Bubble was stable even after agitation stopped *Steol ®CS-370 from Stephan Company
  • Example 2 The data in Table 2 shows that a comparative water-soluble substrate (Ex A) in which the air was incorporated by vigorous mixing, the bubble structure began collapsing immediately after the agitation was stopped as compared to the water-soluble substrate according to the present invention (Ex 1) where the bubble remained stable for longer.
  • the comparative water-soluble substrate (Ex A) was inferior in seal strength and film strength and took longer to dissolve completely in water @5°C when compared to the water-soluble substrate according to the present invention.

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

Claims (15)

  1. Emballage soluble dans l'eau pour contenir une composition de dose unitaire, l'emballage soluble dans l'eau comprenant un substrat soluble dans l'eau ayant une épaisseur de 30 micromètres à 250 micromètres, ledit substrat comprenant :
    (i) un matériau formant un film ; et,
    (ii) de 0,2 à 5 % en masse de tensioactif ;
    dans lequel le substrat présente uniformément dispersées dans celui-ci des bulles de gaz ayant un diamètre moyen inférieur à l'épaisseur totale du substrat.
  2. Emballage selon la revendication 1, dans lequel les bulles de gaz présentent un volume total de 80 à 99 % du volume total du substrat.
  3. Emballage selon la revendication 1 ou 2, dans lequel le tensioactif est un tensioactif anionique ou non-ionique.
  4. Emballage selon la revendication 3, dans lequel le tensioactif anionique est un tensioactif de sulfate.
  5. Emballage selon la revendication 4, dans lequel le tensioactif anionique sulfaté est le laurylsulfate de sodium.
  6. Emballage selon l'une quelconque des revendications précédentes, dans lequel le matériau formant un film est un polymère choisi parmi le poly(alcool vinylique), poly(acétate de vinyle), poly(alcool vinylique) modifié, carboxyméthylcellulose, hydroxypropylméthylcellulose ou des mélanges de ceux-ci.
  7. Emballage selon la revendication 6, dans lequel le polymère présente une masse moléculaire moyenne en masse d'au moins 1 x 105.
  8. Emballage selon la revendication 6 ou 7, dans lequel le polymère est partiellement hydrolysé ayant un degré d'hydrolyse de 60 % à 99 %.
  9. Emballage selon l'une quelconque des revendications précédentes, dans lequel le substrat soluble dans l'eau comprend un plastifiant choisi dans le groupe consistant en glycérol, glycérine, diglycérine, hydroxypropylglycérine, sorbitol, méthylène glycol, diéthylène glycol, triéthylène glycol, tétraéthylène glycol, propylène glycol, polyéthylène glycols, néopentyl glycol, triméthylolpropane, polyéther polyols, éthanolamines, et mélanges de ceux-ci.
  10. Emballage selon l'une quelconque des revendications précédentes, dans lequel le substrat soluble dans l'eau présente une masse de base dans l'intervalle de 35 grammes par mètre carré à 50 grammes par mètre carré.
  11. Emballage selon l'une quelconque des revendications précédentes, dans lequel la quantité de matériau formant un film est de 55 à 80 % en masse du substrat soluble dans l'eau.
  12. Emballage selon l'une quelconque des revendications précédentes, dans lequel le substrat soluble dans l'eau présente une épaisseur de 75 micromètres à 150 micromètres.
  13. Emballage selon l'une quelconque des revendications précédentes, dans lequel le substrat soluble dans l'eau englobe une composition ou un matériau qui est une forme de poudre, comprimé particulaire ou granulaire.
  14. Emballage selon la revendication 13, dans lequel la composition est une composition pour lave-vaisselle, une composition pour le traitement de textile, ou une composition de détergent de lessive.
  15. Utilisation d'un emballage soluble dans l'eau selon l'une quelconque des revendications précédentes pour le lavage de la vaisselle ou lavage de textiles.
EP18734250.6A 2017-07-07 2018-07-03 Emballage hydrosoluble Active EP3649057B1 (fr)

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US201762529682P 2017-07-07 2017-07-07
EP17183033 2017-07-25
PCT/EP2018/067926 WO2019007945A1 (fr) 2017-07-07 2018-07-03 Emballage hydrosoluble

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USD1088343S1 (en) 2022-05-11 2025-08-12 People Against Dirty Holdings Limited Packet

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CN114539694A (zh) * 2021-04-09 2022-05-27 广东宝德利新材料科技股份有限公司 一种泡沫型水溶性包装膜及其制备方法

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US3695989A (en) 1970-08-12 1972-10-03 Robert E Albert Cold water soluble foam plastic package
WO2002060980A2 (fr) 2001-01-31 2002-08-08 The Procter & Gamble Company Films polymeres a dissolution rapide et articles fabriques a partir de ces films

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US8309203B2 (en) * 2006-07-05 2012-11-13 The Procter & Gamble Company Water-soluble substrate with resistance to dissolution prior to being immersed in water
US8466099B2 (en) * 2008-12-08 2013-06-18 The Procter & Gamble Company Process of making an article for dissolution upon use to deliver surfactants
ES2594727T3 (es) * 2010-10-14 2016-12-22 Unilever N.V. Embalaje transparente de composiciones detergentes

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Publication number Priority date Publication date Assignee Title
US3695989A (en) 1970-08-12 1972-10-03 Robert E Albert Cold water soluble foam plastic package
WO2002060980A2 (fr) 2001-01-31 2002-08-08 The Procter & Gamble Company Films polymeres a dissolution rapide et articles fabriques a partir de ces films

Non-Patent Citations (1)

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Title
OSPANOVA ZH. B., MUSABEKOV K. B., ASADOV M. M.: "An effect of surfactants of different nature on stabilization of foaming systems containing polyvinyl alcohol", RUSSIAN JOURNAL OF APPLIED CHEMISTRY, PLEIADES PUBLISHING, MOSCOW, vol. 87, no. 3, 1 March 2014 (2014-03-01), Moscow , pages 355 - 359, XP055863629, ISSN: 1070-4272, DOI: 10.1134/S1070427214030185

Cited By (1)

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Publication number Priority date Publication date Assignee Title
USD1088343S1 (en) 2022-05-11 2025-08-12 People Against Dirty Holdings Limited Packet

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ZA202000094B (en) 2021-07-28
CL2019003817A1 (es) 2020-06-12
CN110869289A (zh) 2020-03-06
EP3649057A1 (fr) 2020-05-13
PH12019502800A1 (en) 2020-09-14
BR112019027194A2 (pt) 2020-06-30
CN110869289B (zh) 2021-09-21

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