Water-soluble unit dose articles

Abstract

The present invention provides a film made from natural materials that exhibits a good solubility profile under low-temperature, rapid, and low-water washing conditions. [Solution] A unit dose article comprising a water-soluble film, wherein the water-soluble film comprises a water-soluble polymer, and the water-soluble polymer is i) Pectin and, ii) A water-soluble unit-dose article comprising a blend with a caseinate polymer.

Description

TECHNICAL FIELD

[0001] A water-soluble unit dose article made from a water-soluble film comprising a water-soluble polymer, wherein the water-soluble polymer i) pectin, and ii) a blend with a caseinate polymer.

BACKGROUND ART

[0002] The demand for innovative packaging solutions has led to great interest in the development of water-soluble films, particularly for use in laundry and automatic dishwashing applications. These films serve as a convenient means for encapsulating detergents, fabric softeners, and other cleaning agents, allowing consumers to use these products in a pre-metered, easy-to-use form. The main requirement for these films is the ability to dissolve effectively in water and facilitate rapid release of the encapsulated substance during the cleaning process.

[0003] In the field of water-soluble films, polyvinyl alcohol (PVA) is widely utilized due to its favorable properties including good film-forming ability, water solubility, and mechanical strength. However, while PVA-based films have been successful in various applications, it is desirable to find alternative films made from natural materials that exhibit good solubility profiles, especially under low temperature, rapid and low-water washing conditions.

SUMMARY OF THE INVENTION

MEANS FOR SOLVING THE PROBLEM

[0004] The present invention relates to a water-soluble unit-dose article comprising a water-soluble film. The water-soluble film comprises a water-soluble polymer, the water-soluble polymer comprising a blend of pectin and a caseinate polymer. Surprisingly, the film of the water-soluble unit-dose article according to the present invention has been found to exhibit a better solubility profile than pectin film or caseinate polymer film. The water-soluble unit-dose article according to the present invention comprises a treatment composition and at least one internal compartment, the treatment composition being contained within the at least one compartment. The treatment composition is selected from laundry detergent compositions, laundry softening compositions, automatic dishwashing compositions, hard surface cleaning compositions, or mixtures thereof. [Modes for carrying out the invention]

[0005] Water-soluble film The water-soluble film contains a water-soluble polymer, which includes a blend of pectin and caseinate polymers. Pectin and caseinate polymers are described in more detail below.

[0006] The water-soluble film of the present invention is water-soluble. The water-soluble film preferably has a thickness of 30 μm to 150 μm, preferably 50 μm to 100 μm, and most preferably 60 μm to 85 μm.

[0007] Characteristics of water-soluble films: The water-soluble film preferably has a dissolution time of less than 90 seconds, preferably less than 60 seconds, and more preferably less than 30 seconds at 10°C and a thickness of about 76 micrometers, as measured according to MonoSol Test Method 205 (MSTM 205), as described in U.S. Patent No. 7,022,656, column 8, lines 10-57. Preferably, the water-soluble film has a dissolution time of less than 120 seconds, preferably less than 90 seconds, more preferably less than 60 seconds, and even more preferably less than 30 seconds at 5°C and a thickness of about 76 micrometers, as measured according to MonoSol Test Method 205 (MSTM 205). Preferably, the disintegration time of the film at a thickness of about 76 microns is less than or equal to about 40 seconds or less, or less than or equal to about 30 seconds, as measured according to MonoSol Test Method 205 (MSTM 205), at a temperature of 10°C. More preferably, the disintegration time of the film at a thickness of approximately 76 microns is approximately 40 seconds or less, or approximately 33 seconds or less, at a temperature of 5°C, as measured according to MonoSol Test Method 205 (MSTM 205).

[0008] The film collapse time (I) and film dissolution time (S) may be corrected to a reference or standard film thickness (76 microns) using the exponential algorithms shown in Equations 1 and 2 below, respectively. Icorrected = Imeasured × (reference thickness) 2 / Measurement thickness 2 ) Scorrected = Smeasured × (Reference thickness) 2 / Measurement thickness 2 )

[0009] Water-soluble films preferably have a solubility percentage of 25% or more, more preferably 35% or more, as measured by the solubility percentage test method described later herein. Generally, a higher solubility percentage is desirable to reduce the possibility of residual film remaining on washed articles exposed to stressful washing conditions (e.g., low water conditions (e.g., overloaded washing machines) and cold wash water conditions). Such residues can be dissolved by further exposure to water, but this may require further effort from the user and is therefore undesirable.

[0010] Generally, a higher tensile strength value is desirable because it results in a tougher water-soluble unit-dose article. A higher e modulus is desirable from the viewpoint of providing water-soluble unit-dose articles that have higher rigidity and are less likely to deform and stick together when loaded in overlapping positions during manufacturing. Preferably, when measured at 23°C and 40%RH, the water-soluble film has a tensile strength or stress at break of at least 20 N / mm², preferably 20 N / mm² to 60 N / mm², more preferably 25 N / mm² to 60 N / mm², a modulus at 10% elongation of at least about 20 N / mm², and a stress at 100% elongation of at least 12 N / mm². Furthermore, when measured according to the same method, the water-soluble film has a tensile strain at break of at least 50%, preferably about 50% to about 1600%, preferably 60% to 800%, preferably about 300% to about 1200%, more preferably about 400% to about 800%. When measured at 100°C and 40%RH, water-soluble films have a tensile strain at break of at least about 50% when measured according to the same method.

[0011] Preferably, the water-soluble film and / or water-soluble polymer resin and / or individual water-soluble polymers have a biodegradation rate of at least 60%, preferably at least 65%, more preferably at least 70% after 60 days, or at least 60%, preferably at least 65%, more preferably at least 70% after 28 days, according to the OECD 301B test.

[0012] Preferably, the water-soluble film has a glass transition temperature of less than -5°C and a melting transition temperature of more than 80°C, as measured by the DSC standard procedure.

[0013] Water-soluble films may be further plasticized upon contact with liquid detergent compositions, resulting in swelling of the water-soluble film (positive film swelling value). Alternatively, water-soluble films may be deplasticized upon contact with liquid detergent compositions, resulting in deswelling of the water-soluble film (negative film swelling value). Negative film swelling values ​​may result in brittle films during product aging, while film swelling values ​​exceeding 15% may make the entire unit-dose article flexible during aging, and therefore aesthetically unattractive. Preferably, the film swelling value is 0% to 15%, more preferably 5% to 15%.

[0014] Most preferably, the weight ratio of pectin to caseinate polymer is 90:10 to 10:90, preferably 75:25 to 25:75.

[0015] The water-soluble polymer may be present in the film at a concentration of 50% to 95% by weight, preferably 55% to 90% by weight, and more preferably 60% to 80% by weight.

[0016] Preferably, the water-soluble film contains a non-aqueous plasticizer. Preferably, the non-aqueous plasticizer is selected from polyols, sugar alcohols, and mixtures thereof. Suitable polyols include polyols selected from the group consisting of glycerol, diglycerin, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol of 400 MW or less, neopentyl glycol, 1,2-propylene glycol, 1,3-propanediol, dipropylene glycol, polypropylene glycol, 2-methyl-1,3-propanediol, trimethylolpropane, and polyether polyols, or mixtures thereof. Suitable sugar alcohols include sugar alcohols selected from the group consisting of isomalt, maltitol, sorbitol, xylitol, erythritol, adonitol, dulcitol, pentaerythritol, and mannitol, or mixtures thereof. More preferably, the non-aqueous plasticizer is selected from glycerol, 1,2-propanediol, dipropylene glycol, 2-methyl-1,3-propanediol, trimethylolpropane, triethylene glycol, polyethylene glycol, sorbitol, or mixtures thereof, and most preferably selected from glycerol, sorbitol, trimethylolpropane, dipropylene glycol, and mixtures thereof. One particularly preferred plasticizer system comprises a blend of glycerol, sorbitol, and 2-ethyl-2-hydroxymethyl-1,3-propanediol. Another particularly preferred plasticizer system comprises a blend of glycerin, dipropylene glycol, and sorbitol. Preferably, the film contains 5% to 50% by weight, preferably 10% to 40% by weight, more preferably 20% to 30% by weight of the non-aqueous plasticizer.

[0017] Preferably, the water-soluble film according to the present invention contains a surfactant. Preferably, the water-soluble film contains 0.1% to 5% by weight, preferably 1% to 3% by weight, of the surfactant. Suitable surfactants include nonionic, cationic, anionic, amphoteric, and bipolar types. Suitable surfactants include, but are not limited to, polyoxyethylene-modified polyoxypropylene glycol, alcohol ethoxylates, alkylphenol ethoxylates, tertiary acetylene glycol and alkanolamides (nonionic substances), polyoxyethylene-modified amines, quaternary ammonium salts and quaternized polyoxyethylene-modified amines (cationic substances), and amine oxides, N-alkyl betaines and sulfobetaines (bipolar substances). Other suitable surfactants include sodium dioctyl sulfosuccinate, lactyl fatty acid esters of glycerol and propylene glycol, lactyl esters of fatty acids, sodium alkyl sulfate, polysorbate 20, polysorbate 60, polysorbate 65, polysorbate 80, lecithin, acetylated fatty acid esters of glycerol and propylene glycol, acetylated esters of fatty acids, and combinations thereof.

[0018] Preferably, the water-soluble film according to the present invention contains a lubricant / release agent. Suitable lubricants / release agents include, but are not limited to, fatty acids and their salts, aliphatic alcohols, fatty acid esters, aliphatic amines, aliphatic amine acetates, and fatty acid amides. Preferred lubricants / release agents are fatty acids, fatty acid salts, and aliphatic amine acetates. Preferably, the amount of lubricant / release agent in the water-soluble film is in the range of 0.02% to 1.5% by weight of the water-soluble film, preferably 0.1% to 1% by weight.

[0019] Preferably, the water-soluble film contains a filler, a spreader, an anti-tack agent, a detack agent, or a mixture thereof. Suitable fillers, spreaders, anti-tack agents, detack agents, or mixtures thereof include, but are not limited to, starch, modified starch, cross-linked polyvinylpyrrolidone, cross-linked cellulose, microcrystalline cellulose, silica, metal oxides, calcium carbonate, talc, and mica. Preferred materials are starch, modified starch, and silica. Preferably, the amount of filler, spreader, anti-tack agent, detack agent, or mixture thereof in the water-soluble film is in the range of 0.1% to 25% by weight of the water-soluble film, preferably 1% to 10% by weight, more preferably 2% to 8% by weight, and most preferably 3% to 5% by weight. In the absence of starch, one preferred range of suitable fillers, spreaders, anti-tack agents, detack agents, or mixtures thereof is 0.1% to 1% by weight, preferably 4% by weight, more preferably 6% by weight, even more preferably 1% to 4% by weight, and most preferably 1% to 2.5% by weight of the water-soluble film.

[0020] Preferably, the water-soluble film according to the present invention has a residual moisture content in the range of at least 4% by weight, more preferably 4% to 15% by weight, and even more preferably 5% to 10% by weight, as measured by Karl Fischer titration. The film was pre-conditioned for 24 hours at a temperature of 20°C and a relative humidity of 60% before determining the residual moisture content.

[0021] Preferably, the water-soluble film according to the present invention contains an aversive agent, preferably a bittering agent. Suitable bittering agents include, but are not limited to, naringin, sucrose octaacetate, quinine hydrochloride, denatonium benzoate, or mixtures thereof. Any suitable concentration of the aversive agent may be used in the film. Suitable levels for water-soluble films include, but are not limited to, 1 ppm to 5000 ppm, or more specifically, 100 ppm to 2500 ppm, or even more specifically, 250 ppm to 2000 rpm.

[0022] The water-soluble film according to the present invention may be opaque, transparent, or translucent. The water-soluble film according to the present invention may include a printed area. The printed area can be obtained using standard techniques such as flexographic printing or inkjet printing.

[0023] The water-soluble film or the water-soluble unit dose article or both according to the present invention may be coated with a lubricant. Preferably, the lubricant is selected from talc, zinc oxide, silica, siloxane, zeolite, silicic acid, alumina, sodium sulfate, potassium sulfate, calcium carbonate, magnesium carbonate, sodium citrate, sodium tripolyphosphate, potassium citrate, potassium tripolyphosphate, calcium stearate, zinc stearate, magnesium stearate, starch, modified starch, clay, kaolin, gypsum, cyclodextrin or mixtures thereof.

[0024] Pectin Pectin is a complex polysaccharide found in the cell walls of various fruits and vegetables. Pectin is a natural substance that acts as a structural component providing strength and rigidity to plant tissues. Pectin is mainly extracted from citrus fruits, apples, and other sources rich in this polysaccharide.

[0025] Chemically, pectin is composed of sugar chain molecules containing galacturonic acid as the main constituent component. The structure of pectin may vary depending on factors such as the source and the extraction method. Pectin molecules may contain side chains of various sugars such as arabinose, galactose, and rhamnose that contribute to their functional properties. It may also have methyl esters of galacturonic acid inherent to the material.

[0026] Pectin may be unmodified or modified, and such modifications include substitution (alkylation, amidation, quaternization, thiolation, sulfation, oxidation, etc.), chain extension (crosslinking and grafting), and depolymerization (chemical, physical, and enzymatic degradation).

[0027] Pectin contains a helical chain of galacturonic acid (GalA) residues linked by alpha-1,4 glycosidic bonds, where the carboxyl groups can be esterified to any extent with methyl groups or partially or completely converted to salts. Pectin may contain any type of galacturonane, including heterogalacturonan (HG), substituted galacturonanes, rhamnogalacturonane I pectin (RG-I), rhamnogalacturonane II (RG-II), xylogalacturonane (XGA), or mixtures thereof.

[0028] Esterification The esterification level or degree of esterification (DE) is the ratio of esterified galacturonic acid groups to total galacturonic acid groups (and therefore has a value of 0% to 100%). Preferably, the degree of esterification is 1% to 49%, more preferably 25% to 48%, and most preferably 24% to 35%.

[0029] The level of esterification by methyl groups may be high methoxypectin (HM pectin), in which more than half of all galacturonic acid is esterified, or low methoxypectin (LM pectin), in which less than half of all galacturonic acid is esterified. In the case of LM pectin, the degree of methoxylation is preferably 1% to 49%, more preferably 25% to 48%, and most preferably 24% to 35%. Preferably, the pectin is high methoxypectin.

[0030] Amidated pectin Pectin can be amidated. Alternatively, pectin does not need to be amidated. Representative segments of non-acetylated, non-amidated pectin molecules:

[0031] [ka]

[0032] "Amidated pectin" is intended to mean that pectin is modified by the conversion of some of its carboxyl groups to carboxylic acid amides, for example, as shown in the amidation units below.

[0033] [ka]

[0034] Preferably, the degree of amidation is 1% to 90%, more preferably 10 to 50%, even more preferably 20% to 40%, and most preferably 20 to 30%. The degree of amidation (DA) can be measured based on the total number of galacturonic acid units in the molecule by various known methods, such as near-infrared spectroscopy.

[0035] Pectin can be amidated by any suitable method, for example, with ammonia which may be soluble in methanol or in aqueous form. This converts the methyl ester groups to carboxamide [-CONH2] groups. In this method, the methyl ester groups are lost as they are converted to carboxamide groups, so that low-methoxy (LM) pectin (by definition) is formed. Amidated (LM) pectin may have 15-25% of the carboxyl groups converted to carboxamide groups.

[0036] Low methoxyamidated pectin Amidation can achieve a reduction in methyl levels and therefore provide low methoxyamidated pectin.

[0037] supplier Pectin is preferably of plant origin and can be supplied from any suitable source, such as citrus peel or pomace, or from both by-products of fruit production. Pomace can also be obtained from sugar beets.

[0038] Pectin MW The pectin has a weight-average molecular weight of 200,000 g / mol or more, preferably 250,000 g / mol or more, and more preferably 300,000 g / mol or more.

[0039] Caseinate polymer Casein is a milk-derived protein that is relatively insoluble in water. It is often obtained by precipitation after the addition of an acid to milk (caseic acid) or rennet (rennet casein). Caseinates are salts of casein; typically defined as its counterions selected from the group consisting of calcium, potassium, ammonium, magnesium, and sodium, or mixtures thereof, most preferably sodium.

[0040] The water-soluble film according to the present invention comprises a water-soluble polymer containing a blend of a caseinate polymer and pectin, wherein the caseinate polymer is preferably selected from alkali metal salts of caseinate, and more preferably sodium caseinate.

[0041] The polymer according to the present invention is stated to contain caseinate, but in practice, this caseinate is a mixture of caseinate and casein impurities. The relative weight ratio of casein impurities to caseinate is a function of the pH of the water-soluble film. Therefore, when caseinate is referred to herein, it includes levels of pure sodium caseinate as well as casein impurities.

[0042] Although not bound by theory, casein consists of a(s1)-casein, a(s2)-casein, β-casein, and κ-casein. Like any protein, casein is composed of hundreds of individual amino acids, each of which can have a positive or negative charge depending on the pH of the surrounding system. At a certain pH value, all positive and negative charges on casein remain in equilibrium (i.e., the net charge on the protein is 0), and this pH value is known as the isoelectric point (IEP), which for casein is 4.6. The IEP is the pH at which the protein is poorly soluble. Therefore, to make casein soluble, alkaline conditions are used, and it is used in the form of caseinate.

[0043] Preferably, the water-soluble polymer is present in the water-soluble film according to the present invention at a concentration of 60% to 80% by weight and consists of a mixture of pectin and a caseinate polymer.

[0044] Film manufacturing method The water-soluble films according to the present invention may be formed by mixing and co-casting pectin and caseinate polymers in a casting solution with preferred and optional secondary additives as described herein, according to the types and amounts described herein. When the polymers are mixed first, the water-soluble film is preferably formed by casting the resulting mixture (e.g., together with other plasticizers and other additives) to form a film. Another embodiment features a water-soluble film formed by extrusion, e.g., blown extrusion. Most preferably, the water-soluble films according to the present invention are prepared by solution casting.

[0045] Water-soluble unit dose articles The present invention relates to a water-soluble unit-dose article comprising a water-soluble film as described herein, a treatment composition, and at least one internal compartment, wherein the treatment composition is contained within at least one compartment. The treatment composition will be described in more detail below.

[0046] A water-soluble unit-dose article includes a water-soluble film molded to contain at least one internal compartment surrounded by a water-soluble film. The unit-dose article may include a first water-soluble film and a second water-soluble film sealed together to define the internal compartment. The water-soluble unit-dose article is configured to prevent the treatment composition from leaking out of the compartment during storage. However, when the water-soluble unit-dose article is added to water, the water-soluble film dissolves, releasing the contents of the internal compartment into the washing solution.

[0047] A compartment should be understood as a sealed internal space within a unit-dose article that holds the detergent composition. During manufacturing, the first water-soluble film may be shaped to include an opening compartment to which the treatment composition is added. Next, the first film is covered with a second water-soluble film in an orientation that closes the opening of the compartment. The first and second films are then sealed together along the sealing region. Sealing can be performed after solvent sealing, heat sealing, or a combination thereof. A preferred sealing solvent is water.

[0048] A unit dose article may contain one or more compartments, more than two compartments, or more than three compartments. The compartments may be arranged in an overlapping orientation, that is, one on top of the other. In such an orientation, the unit dose article contains three films: top, middle, and bottom. Alternatively, the compartments may be positioned in a side-by-side orientation, that is, one adjacent to the other. The compartments may also be oriented in a "tire and rim" arrangement, that is, the first compartment is positioned adjacent to the second compartment, but the first compartment at least partially surrounds the second compartment but does not completely enclose it. Alternatively, one compartment may be completely enclosed within another compartment.

[0049] If a unit-dose article contains at least two compartments, one of the compartments may be smaller than the other. If a unit-dose article contains at least three compartments, two of the compartments may be smaller than a third compartment. If a unit-dose article contains at least four compartments, at least three of the compartments may be smaller than a fourth compartment, preferably with the smaller compartments overlapping the larger compartments. The overlapping compartments are preferably oriented adjacent to each other.

[0050] Preferably, the water-soluble unit-dose article comprises at least two compartments, preferably at least three compartments, and more preferably at least four compartments, and most preferably, the water-soluble unit-dose article comprises a first compartment, at least a second compartment superimposed on the first compartment, more preferably at least a third compartment oriented adjacent to the second compartment (with the second and third compartments superimposed on the first compartment), and even more preferably at least a fourth compartment oriented adjacent to the second and third compartments (with the second, third, and fourth compartments superimposed on the first compartment).

[0051] In a multi-compartment orientation, the detergent composition may be contained in at least one of the compartments. For example, the detergent composition may be contained in only one compartment, or in two compartments, or even three compartments, or even all of the available compartments.

[0052] Each section may contain the same composition or different compositions. The different compositions may all be in the same form or in different forms.

[0053] The water-soluble unit-dose article may contain at least two internal compartments, and the detergent composition may be contained in at least one of these compartments. Preferably, the unit-dose article may contain at least three compartments, and the detergent composition may be contained in at least one of these compartments.

[0054] A water-soluble unit-dose article according to the present invention may comprise at least one water-soluble film according to the present invention. Alternatively, a water-soluble unit-dose article according to the present invention may comprise at least two or even at least three water-soluble films according to the present invention. Alternatively, a water-soluble unit-dose article according to the present invention may comprise only the water-soluble films according to the present invention, i.e., it may not comprise any water-soluble films outside the scope of the present invention. Preferably, a water-soluble single-compartment unit-dose article or a water-soluble multi-compartment unit-dose article with multiple adjacent compartments is prepared, where both the lower and upper water-soluble films enclosing the individual compartments are water-soluble films according to the present invention. Alternatively, either the upper or lower water-soluble film is according to the present invention. A water-soluble unit-dose article having compartments in an overlapping configuration may be prepared. In this configuration, each of the upper, lower, and central water-soluble films may be a water-soluble film according to the present invention. Alternatively, one film, for example, only the central water-soluble film, or only the upper water-soluble film, or only the lower water-soluble film, or any combination of these water-soluble films, may be a water-soluble film according to the present invention, while the remaining water-soluble films are outside the scope of the present invention. Preferably, all water-soluble films contained within a water-soluble unit dose article are water-soluble films according to the present invention. These water-soluble films according to the present invention may be chemically and physically the same, or they may be chemically and / or physically different. "Different" means that the first water-soluble film has at least one chemical and / or physical characteristic that is different from the second water-soluble film. This characteristic can be obtained by selecting different polymer resins, e.g., the average viscosity of the individual polymer solutions, the average degree of hydrolysis of the individual polymers, the ratio of the first water-soluble polymer to the second water-soluble polymer, or a mixture thereof, of different polymer resins. The "target average" takes into account the standard polymer variability inherent in any manufacturing method. Alternatively, this characteristic can also be obtained by changing the relative content of individual components within the water-soluble film, such as polymer resins, with respect to the plasticizer content or water content, or by changing the precise chemical properties of additives."Different" characteristics are evaluated for the starting film before deformation, and differences in water-soluble film content as a result of the deformation process, exchange of active substances between the film and the detergent composition resulting from exposure to the encapsulated detergent composition, and exchange of active substances with the surrounding storage environment are excluded in this evaluation.

[0055] Processing composition The treatment composition is selected from laundry detergent compositions, laundry softening compositions, automatic dishwashing compositions, hard surface cleaning compositions, or mixtures thereof, preferably a laundry detergent composition, and preferably a liquid, powder, or mixture thereof, preferably a liquid composition.

[0056] The term "liquid" includes gels, solutions, suspensions, pastes, or mixtures thereof.

[0057] In this specification, "powder" means that the treatment composition may contain solid particles or may be a single homogeneous solid. Preferably, the powder treatment composition contains particles. This means that the powder treatment composition contains individual solid particles, and does not mean that the solid is a single homogeneous solid. The particles may be free-flowing or compressed, and are preferably free-flowing.

[0058] Preferably, the treatment composition is a laundry detergent composition, most preferably a liquid laundry detergent composition.

[0059] The laundry detergent composition can be used in hand washing operations or in automatic machine washing operations, and is preferably used in automatic machine washing operations.

[0060] Preferably, the treatment composition contains a non-soap surfactant, and the non-soap surfactant includes an anionic non-soap surfactant and a nonionic surfactant. Preferably, the treatment composition contains 10% to 60% by weight, more preferably 20% to 55% by weight, of the non-soap surfactant.

[0061] The weight ratio of non-soap anionic surfactant to nonionic surfactant may be 1:1 to 20:1, preferably 1.25:1 to 17.5:1, 1.5:1 to 15:1, 1.75:1 to 13:1, or 2:1 to 10:1.

[0062] Preferably, the non-soap anionic surfactant comprises a linear alkylbenzene sulfonate, an alkyl sulfate, or a mixture thereof. The weight ratio of linear alkylbenzene sulfonate to alkyl sulfate is 1:2 to 9:1, preferably 1:1 to 7:1, more preferably 1:1 to 5:1, and most preferably 1:1 to 4:1.

[0063] Exemplary linear alkylbenzene sulfonates are C 10 ~C 16 Alkylbenzenesulfonic acid or C 11 ~C 14 This is an alkylbenzene sulfonic acid. "Linear" in this specification means that the alkyl group is linear. Alkylbenzene sulfonates are well known in the art.

[0064] Alkyl sulfate anionic surfactants may include alkoxylated alkyl sulfates, non-alkoxylated alkyl sulfates, or mixtures thereof. Preferably, the alkoxylated alkyl sulfate anionic surfactant is an ethoxylated alkyl sulfate anionic surfactant.

[0065] The alkyl sulfate anionic surfactant may include an ethoxylated alkyl sulfate anionic surfactant having a molar average degree of ethoxylation of preferably 1 to 5, more preferably 1 to 3, and most preferably 2 to 3.

[0066] The alkyl sulfate anionic surfactant may contain non-ethoxylated alkyl sulfates and ethoxylated alkyl sulfates, and the molar average degree of ethoxylation of the alkyl sulfate anionic surfactant is 1 to 5, more preferably 1 to 3, and most preferably 2 to 3.

[0067] The alkyl fraction of the alkyl sulfate anionic surfactant can preferably be derived from an aliphatic alcohol, an oxo-synthetic alcohol, a Guerbet alcohol, or a mixture thereof.

[0068] Preferably, the treatment composition contains 10% to 50% by weight, more preferably 15% to 45% by weight, even more preferably 20% to 40% by weight, and most preferably 30% to 40% by weight of a non-soap anionic surfactant.

[0069] Preferably, the nonionic surfactant is selected from alcohol alkoxylates, oxo-synthetic alcohol alkoxylates, Guerbet alcohol alkoxylates, alkylphenol alcohol alkoxylates, or mixtures thereof.

[0070] The treatment composition preferably contains 0.01% to 25% by weight, preferably 1% to 22.5% by weight, more preferably 5% to 20% by weight, and most preferably 8% to 20% by weight of a nonionic surfactant.

[0071] Preferably, the treatment composition comprises 0.5% to 20% by weight, more preferably 1% to 15% by weight, even more preferably 1.5% to 10% by weight, and most preferably 2% to 8% by weight of soap, preferably a fatty acid salt, more preferably an amine-neutralized fatty acid salt, wherein the amine is preferably an alkanolamine, more preferably selected from monoethanolamine, diethanolamine, triethanolamine, or a mixture thereof, and more preferably monoethanolamine.

[0072] Preferably, the treatment composition is a liquid treatment composition, and more preferably, the liquid treatment composition contains less than 15% by weight, more preferably less than 13% by weight, even more preferably 1% to 12% by weight, and most preferably 5% to 12% by weight of water.

[0073] Preferably, the treatment composition is a liquid treatment composition comprising a non-aqueous solvent selected from 1,2-propanediol, dipropylene glycol, tripropylene glycol, glycerol, sorbitol, polyethylene glycol, or mixtures thereof. Preferably, the liquid treatment composition contains 10% to 40% by weight, preferably 15% to 30% by weight, of the non-aqueous solvent.

[0074] Preferably, the treatment composition contains a fragrance.

[0075] Preferably, the treatment composition includes auxiliary components selected from the group comprising enzymes, citrates, bleaching agents, bleaching catalysts, dyes, hue dyes, whitening agents, cleaning polymers containing alkoxylated polyamines and polyethyleneimines, stain-releasing polymers, surfactants, solvents, color transfer inhibitors, chelating agents, encapsulated fragrances, polycarboxylates, structuring agents, pH adjusters, and builders containing mixtures thereof.

[0076] Those skilled in the art will be able to envision, using known knowledge and techniques, how to formulate and prepare suitable treatment compositions. Treatment compositions may include common detergent components, such as surfactants, polymers, bleaches, enzymes, fragrances, dyes, structuring agents, fillers, water, or mixtures thereof.

[0077] Those skilled in the art will be familiar with known techniques for manufacturing water-soluble unit-dose articles according to the present invention. [Examples]

[0078] The solubility percentages of three bio-based water-soluble films were measured according to the test methods described below in this specification. Film 1 is based on a water-soluble caseinate polymer. Film 2 is based on a water-soluble pectin. Film 3 is based on a 50 / 50 weight blend of caseinate polymer and pectin. The data summarized in Table 1 show the synergistic solubility percentages for each blend.

[0079] [Table 1]

[0080] Water-soluble film manufacturing method A 100% by weight solution of active pectin or caseinate polymer or a 50 / 50 by weight blend (Sigma Aldrich citrus peel-derived pectin, Thermoscientific sodium caseinate) was prepared in desalted water containing 43% by weight glycerol of the polymer. The solution was homogenized at 70°C for at least 4 hours and left overnight at room temperature to allow degassing before casting. The solution was poured in thin layers onto a PET casting plate through a film applicator with a wet gap ranging from 250 μm to 350 μm and dried overnight at room temperature and 35% rH. The resulting film contained 66% by weight of water-soluble polymer resin, 28% by weight of glycerol plasticizer system, and 6% water. Individual film thicknesses are summarized in Table 2 below.

[0081] [Table 2]

[0082] Dissolution % Test Method In this dissolution chamber residue test method, for each test film, three test specimens are cut out using a cutting punch from a selected test film having a thickness of approximately 80 μm. The film test specimens are weighed and tracked throughout the test to ensure that all specimens have similar starting weights (within a difference of no more than 10%). The initial film weight (Fo) is recorded. Two sets of ultrasonically treated, clean, and dried screens are weighed for each test specimen and tracked throughout the test. The initial screen weight (So, as the sum of the two screens combined) is recorded. The test specimen dissolution chamber is assembled by sandwiching the film test specimen between the centers of the two screens, followed by two rubber gaskets (one on each side between the screen and the washer), and then two washers. The dissolution chamber assembly is secured with four binder clips evenly spaced around the washers, and the clips are folded away from the screens. Fill a beaker with 1500 mL of RO water (e.g., demineralized water) at laboratory temperature (5±1°C) and record the room temperature. Set the timer to 10 minutes, the predetermined immersion time. Place the dissolution chamber assembly in the beaker, immediately start the timer, and immerse the dissolution chamber assembly in the water at an entry angle of approximately 45°. This entry angle facilitates the removal of air bubbles from the chamber. The dissolution chamber assembly is placed at the bottom of the beaker so that the test specimen film is positioned horizontally at approximately 10 mm from the bottom of the beaker. The four folded binder clips of the dissolution chamber assembly are preferable for maintaining a film clearance of approximately 10 mm from the bottom of the beaker, but any other equivalent support means can be used. At the end of 10 minutes, slowly remove the dissolution chamber assembly from the beaker at an angle of approximately 45°. Hold the dissolution chamber assembly horizontally on a pre-weighed aluminum pan to capture all liquid dripping from the screen, and carefully remove the binder clips, washers, and gasket. Do not open the screen while it is sandwiched. Place the sandwiched screen (i.e., screen / residual undissolved film / screen) on an aluminum pan and dry it in the oven at 100°C for 30 minutes.Weigh the dried, sandwiched screen set, including all undissolved film remaining inside, together with the aluminum pan. Subtract the weight of the aluminum pan and record the final sandwiched screen weight (Sf collectively, including the dry film droplets). Calculate the percentage of residue remaining on the film test specimen ("DC Residue"). DC residue=100×((Sf-So) / F0)

[0083] Therefore, the dissolution percentage is equal to 100% minus the residue percentage.

[0084] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​listed. Instead, unless otherwise specified, each such dimension is intended to mean both the listed value and the functionally equivalent range encompassing that value. For example, a dimension disclosed as "40 mm" is intended to mean "approximately 40 mm."

Claims

1. A water-soluble unit-dose article comprising a water-soluble film, a treatment composition, and at least one internal compartment, wherein the treatment composition is contained within the at least one internal compartment, the treatment composition is selected from laundry detergent compositions, laundry softening compositions, automatic dishwashing compositions, hard surface cleaning compositions, or mixtures thereof, and the water-soluble film comprises a water-soluble polymer, and the water-soluble polymer is i) Pectin and, ii) Contains a blend with caseinate polymer, A water-soluble unit-dose article wherein the water-soluble polymer is present in an amount of 50% to 95% by weight of the film, and the weight ratio of the pectin to the caseinate polymer is 90:10 to 10:

90.

2. The water-soluble unit-dose article according to claim 1, wherein the weight ratio of the pectin to the caseinate polymer is 75:25 to 25:

75.

3. The water-soluble unit-dose article according to claim 1 or 2, wherein the caseinate polymer is selected from alkali metal salts of caseinate, preferably sodium caseinate.

4. The water-soluble unit dose article according to any one of claims 1 to 3, wherein the water-soluble polymer is present in an amount of 55% to 90% by weight, preferably 60% to 80% by weight, of the film.

5. The water-soluble unit dose article according to any one of claims 1 to 4, wherein the film comprises a non-aqueous plasticizer, preferably the non-aqueous plasticizer is selected from polyols, sugar alcohols, and mixtures thereof, more preferably selected from glycerol, 1,2-propanediol, trimethylolpropane, dipropylene glycol, 2-methyl-1,3-propanediol, 2-ethyl-2-hydroxymethyl-1,3-propanediol, triethylene glycol, polyethylene glycol, sorbitol, or mixtures thereof, most preferably selected from glycerol, sorbitol, trimethylolpropane, dipropylene glycol, and mixtures thereof, and preferably the film comprises 5% to 50% by weight, preferably 10% to 40% by weight, more preferably 20% to 30% by weight of the non-aqueous plasticizer of the film.

6. The water-soluble unit dose article according to any one of claims 1 to 5, wherein the water-soluble film contains a surfactant in an amount of 0.1% to 5% by weight, preferably 1% to 3% by weight, of the water-soluble film.

7. The water-soluble unit-dose article according to any one of claims 1 to 6, wherein, in the case of a film with a thickness of 76 microns, the dissolution time is less than 120 seconds, preferably less than 90 seconds, and more preferably less than 60 seconds at 5°C according to MSTM-205.

8. The water-soluble unit-dose article according to any one of claims 1 to 7, wherein the water-soluble film, when measured by Karl Fischer titration, contains a residual moisture content of at least 4% by weight, more preferably 4% to 15% by weight, and even more preferably 5% to 10% by weight of the film.

9. The water-soluble unit dose article according to any one of claims 1 to 8, wherein the water-soluble film has a thickness of 30 μm to 150 μm, preferably 50 μm to 100 μm, and most preferably 60 μm to 85 μm.

10. A method for producing a film of a water-soluble unit-dose article according to any one of claims 1 to 9, i) A step of dissolving the caseinate polymer, pectin, and any additive in water to form an aqueous solution, A method comprising the steps of: ii) casting the solution obtained from step i) onto a film.

11. The water-soluble unit-dose article according to any one of claims 1 to 9, wherein the film has a dissolution percentage of 25% or more, preferably 35% or more, when measured by the dissolution percentage test method described herein.

12. The water-soluble unit-dose article according to any one of claims 1 to 9 or 11, wherein the processing composition is a liquid, a powder, or a mixture thereof, preferably a liquid laundry composition.

13. The water-soluble unit-dose article according to any one of claims 1 to 9 or 11 to 12, wherein the treatment composition comprises a non-soap surfactant, preferably the non-soap surfactant is selected from an anionic non-soap surfactant, a nonionic surfactant, and a mixture thereof, and preferably the treatment composition comprises 10% to 60% by weight, more preferably 20% to 55% by weight of the non-soap surfactant of the treatment composition.

14. The water-soluble unit-dose article according to any one of claims 1 to 9 or 1 to 13, wherein the treatment composition contains less than 15% by weight, preferably less than 13% by weight, preferably 1% to 12% by weight, and preferably 5% to 12% by weight of water in proportion to the treatment composition.

15. The water-soluble unit-dose article according to any one of claims 1 to 9 or 11 to 14, wherein the treatment composition contains 10% to 40% by weight, preferably 15% to 30% by weight, of a non-aqueous solvent.

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