Foaming detergent

Abstract

To provide an expandable detergent large in foam formation amount and capable of suppressing the foam formation amount at a low water temperature.SOLUTION: By accommodating a detergent composition containing (A) acid, (B) hydrogen carbonate, and (C) a surfactant, and having a percentage of particles with less than 180 μm in the hydrogen carbonate of 50 wt.% or more in a water-soluble packaging material, and immersing the same into water as a state accommodated in the water-soluble packaging material, foam formation amount can be large and further reduction of the foam formation amount can be suppressed even at a low water temperature.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a foaming detergent. More specifically, the present invention relates to a foaming detergent that has a large amount of foam and can suppress a decrease in the amount of foam at low water temperatures.

Background Art

[0002] Powdery foaming detergents containing a foaming agent can exhibit excellent cleaning effects due to the interaction between the chemical cleaning power of surfactants and the physical cleaning power of the foaming action. Therefore, they are widely used for cleaning toilets, drain pipes, sinks, washing machines, toilets, bathtubs, etc.

[0003] Conventionally, various studies have been conducted on powdery foaming detergents, and powdery foaming detergents with various compositions have been proposed. For example, Patent Document 1 reports that a foaming powder detergent composition containing an inorganic carbonate, a water-soluble solid acid, and inorganic sodium sulfate particles, wherein 85% by mass or more of the inorganic sodium sulfate particles can pass through a sieve with an aperture of 150 μm, and the content ratio of the inorganic carbonate to the water-soluble solid acid is in the range of 4:1 to 1:3 by mass ratio, has excellent foaming properties and storage stability.

[0004] When such a powdery foaming detergent is immersed in water, an acid reacts with a carbonic acid compound to generate foam, exerting a physical cleaning action and also a chemical cleaning action by a surfactant. Therefore, there is no need for special scrubbing, it is hygienic and highly convenient, and is widely accepted by consumers.

[0005] However, conventional powdery foaming detergents have a drawback that when immersed in water, a part of them floats on the water surface on top of the foam during foaming (dissolving), so that a sufficient amount of foam cannot be obtained.

[0006] In addition, since the temperature of the flush water in the toilet etc. changes depending on the season, it is required that the cleaning power of the powdery foaming detergent does not vary due to the change in water temperature. However, conventional powdery foaming detergents have the drawback that the amount of foam decreases when the water temperature for immersion is low.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] An object of the present invention is to provide a foaming detergent that has a large amount of foam and can suppress a decrease in the amount of foam at low water temperatures.

Means for Solving the Problems

[0009] The present inventor conducted intensive studies to solve the above problems, and as a result, found that when a cleaning composition containing (A) an acid, (B) a hydrogen carbonate, and (C) a surfactant, and having a proportion of particles less than 180 μm in the hydrogen carbonate of 30% by weight or more, is contained in a water-soluble packaging material and immersed in water in the state of being contained in the water-soluble packaging material, a large amount of foam is generated and the decrease in the amount of foam can be suppressed even at a low water temperature. The present invention was completed by further studies based on such findings.

[0010] That is, the present invention provides an invention in the following aspects. Item 1. A foaming detergent, wherein a cleaning composition is contained in a water-soluble packaging material, the cleaning composition contains (A) an acid, (B) a hydrogen carbonate, and (C) a surfactant, and in the hydrogen carbonate, the proportion of particles less than 180 μm is 30% by weight or more. Item 2. The foaming cleaning agent according to Item 1, wherein the proportion of particles of 45 μm or more and less than 180 μm in the hydrogen carbonate accounts for 50% by weight or more. Item 3. The foaming cleaning agent according to Item 1 or 2, wherein the proportion of particles of less than 106 μm in the hydrogen carbonate accounts for 80% by weight or more. Item 4. The foaming cleaning agent according to any one of Items 1 to 3, wherein the hydrogen carbonate is sodium hydrogen carbonate. Item 5. The foaming cleaning agent according to any one of Items 1 to 4, wherein the acid is an organic acid. Item 6. The foaming cleaning agent according to any one of Items 1 to 5, wherein the cleaning composition further contains a bleaching agent. Item 7. The foaming cleaning agent according to any one of Items 1 to 6, which is for cleaning a toilet bowl. Item 8. A cleaning method of immersing the foaming cleaning agent according to any one of Items 1 to 7 in water in an object to be cleaned.

Effect of the Invention

[0011] When the foaming cleaning agent of the present invention is immersed in water, the amount of foam is large and the foaming property is improved, so that an excellent cleaning effect can be achieved. Further, even when the foaming cleaning agent of the present invention is immersed in water at a low temperature (about 5 °C), the amount of foam is large and a decrease in the amount of foam can be suppressed, so that a difference in the cleaning effect is hardly caused by the water temperature, and a stable cleaning effect can be achieved throughout the year.

Brief Description of the Drawings

[0012]

Figure 1

Mode for Carrying Out the Invention

[0013] The foaming detergent of the present invention is characterized in that the cleaning composition is contained in a water-soluble packaging material, the cleaning composition contains (A) an acid, (B) a hydrogen carbonate, and (C) a surfactant, and the proportion of particles less than 180 μm in the hydrogen carbonate is 30% by weight or more. Hereinafter, the foaming detergent of the present invention will be described in detail.

[0014] [Powder cleaning composition] The foaming detergent of the present invention includes, as a cleaning composition, a cleaning composition containing (A) an acid, (B) a hydrogen carbonate showing a specific particle size distribution, and (C) a surfactant. Hereinafter, the cleaning composition will be described.

[0015] ·(A) acid The cleaning composition used in the present invention contains an acid (which may also be referred to as the “(A) component”) as a component that reacts with the (B) component described below in the presence of water to generate carbon dioxide gas.

[0016] The acid may be in either solid or liquid form, but preferably solid form. Also, the acid may be either an organic acid or an inorganic acid, but preferably an organic acid.

[0017] Specific examples of the acid include organic acids such as citric acid, tartaric acid, fumaric acid, malic acid, maleic acid, gluconic acid, succinic acid, and salicylic acid; and inorganic acids such as phosphoric acid, sulfamic acid, sulfuric acid, nitric acid, and hydrochloric acid.

[0018] Among these acids, preferably a solid organic acid, more preferably citric acid.

[0019] These acids may be used alone or in combination of two or more.

[0020] Regarding the content of component (A) in the cleaning composition, it may be appropriately set according to the amount of foaming, the content of component (B) described later, the amount of the cleaning composition contained in the water-soluble package, etc. For example, it may be 5 to 70% by weight, preferably 15 to 60% by weight, more preferably 20 to 50% by weight, and particularly preferably 30 to 45% by weight.

[0021] ·(B) hydrogen carbonate The cleaning composition used in the present invention contains a hydrogen carbonate (which may also be referred to as “component (B)”) showing a specific particle size distribution as a component that reacts with the above-mentioned component (A) in the presence of water to generate carbon dioxide.

[0022] The hydrogen carbonate only needs to be water-soluble, and its type is not particularly limited as long as it can react with the above-mentioned component (A) in the presence of water to generate carbon dioxide gas. For example, alkali metal salts of hydrogen carbonate such as sodium hydrogen carbonate and potassium hydrogen carbonate can be mentioned.

[0023] Among these hydrogen carbonates, from the viewpoint of increasing the amount of foaming and more effectively suppressing the decrease in the amount of foaming at low water temperature, sodium hydrogen carbonate is preferably mentioned.

[0024] These hydrogen carbonates may be used alone or in combination of two or more.

[0025] In the present invention, as the hydrogen carbonate, one in which particles less than 180 μm account for 30% by weight or more of the whole particles of the hydrogen carbonate is used. In the present invention, by using a hydrogen carbonate having such a specific particle size distribution and accommodating the cleaning composition in a water-soluble packaging material, it becomes possible to increase the amount of foaming and suppress the decrease in the amount of foaming even at low water temperature. From the viewpoint of further increasing the amount of foaming and more effectively suppressing the decrease in the amount of foaming at low water temperature, as the hydrogen carbonate, the proportion of particles less than 180 μm is 30 to 100% by weight, preferably 50 to 100% by weight, more preferably 70 to 100% by weight, and particularly preferably 80 to 100% by weight.

[0026] Further, as a preferred embodiment of the hydrogen carbonate used in the present invention, the proportion of particles having a size of 45 μm or more and less than 180 μm is 50% by weight or more, preferably 60 to 90% by weight, more preferably 70 to 85% by weight, based on the total amount of the hydrogen carbonate particles. Further, as a preferred embodiment of the hydrogen carbonate used in the present invention, the proportion of particles having a size of 63 μm or more and less than 180 μm is 40% by weight or more, preferably 50 to 90% by weight, more preferably 55 to 85% by weight, particularly preferably 70 to 85% by weight, based on the total amount of the hydrogen carbonate particles. Further, as a preferred embodiment of the hydrogen carbonate used in the present invention, the proportion of particles having a size of 75 μm or more and less than 180 μm is 20% by weight or more, preferably 30 to 90% by weight, more preferably 35 to 85% by weight, based on the total amount of the hydrogen carbonate particles. By adopting the hydrogen carbonate having such a particle size distribution, it becomes possible to more effectively increase the amount of foaming and suppress the decrease in the amount of foaming at low water temperatures.

[0027] Further, as a particularly preferred embodiment of the hydrogen carbonate used in the present invention, the proportion of particles having a size of less than 106 μm is 80% by weight or more, preferably 85 to 99% by weight, more preferably 90 to 98% by weight, based on the total amount of the hydrogen carbonate particles. By adopting the hydrogen carbonate having such a particle size distribution, it becomes possible to remarkably increase the amount of foaming and suppress the decrease in the amount of foaming at low water temperatures.

[0028] In the present invention, the particle size distribution of the hydrogen carbonate is the particle size distribution determined in accordance with the method of "mechanical sieving" in the "dry sieving test method" specified in JIS0069:1992 "Test method for sieving of chemical products". Specifically, first, sieves with mesh openings of 500 μm, 250 μm, 180 μm, 150 μm, 106 μm, 75 μm, 63 μm, and 45 μm are prepared and stacked on a tray such that the one with a smaller mesh opening is at the lower stage and the one with a larger mesh opening is at the upper stage. Next, the sample is charged into the topmost sieve and covered. Then, vibration is applied with a vibrator to perform sieving. After the sieving is completed, the particle size distribution described above can be obtained by measuring the mass on and under each stage of the sieve.

[0029] Also, regarding the average particle diameter of the hydrogen carbonate used in the present invention, there is no particular limitation as long as it has the above-mentioned particle size distribution. For example, it may be 200 μm or less, preferably 40 to 180 μm, and more preferably 50 to 150 μm.

[0030] In the present invention, the average particle diameter of the hydrogen carbonate is the cumulative 50% value on a weight basis calculated from the particle size distribution determined in accordance with the method of "mechanical sieving" in the "dry sieving test method" specified in JIS0069:1992 "Test method for sieving of chemical products". Specifically, first, by the above-mentioned sieving test, the mass on and under each sieve is determined, the residue on sieve (%) is calculated according to the following calculation formula, and further, the average particle diameter can be calculated according to the following calculation formula using the residue on sieve (%).

Equation

[0031] Regarding the content of component (B) in the cleaning composition, it may be appropriately set according to the foaming amount, the content of component (A), the amount of the cleaning composition contained in the water-soluble package, etc. For example, it may be 20 to 80% by weight, preferably 30 to 60% by weight, and more preferably 40 to 55% by weight.

[0032] In the cleaning composition, the ratio of component (A) to component (B) is not particularly limited as long as it is within a range corresponding to each of the above contents. For example, per 100 parts by weight of component (A), component (B) is 25 to 1600 parts by weight, preferably 60 to 300 parts by weight, and more preferably 80 to 200 parts by weight.

[0033] ·(C) surfactant The cleaning composition used in the present invention contains a surfactant (sometimes referred to as “component (C)”) in order to provide cleaning power by surfactant action.

[0034] The type of surfactant is not particularly limited as long as it can be used as a component of the cleaning agent, and any of an anionic surfactant, a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant may be used.

[0035] Specific examples of the anionic surfactant include alkylbenzene sulfonates having an alkyl group with an average carbon number of 10 to 20, alkenyl sulfonates (α-olefin sulfonic acid) having an average carbon number of 10 to 20, alkylsulfosuccinates having an alkyl group with an average carbon number of 10 to 20, alkyl sulfates having an average carbon number of 10 to 20, alkanesulfonates having an average carbon number of 10 to 20, and the like. These anionic surfactants may be used alone or in combination of two or more.

[0036] As nonionic surfactants, specifically, there are polyethylene glycol type surfactants such as higher alcohol ethylene oxide adducts, alkylphenol ethylene oxide adducts, fatty acid ethylene oxide adducts, polyhydric alcohol fatty acid ester ethylene oxide adducts, higher alkylamine ethylene oxide adducts, fatty acid amide ethylene oxide adducts, ethylene oxide adducts of fats and oils, and polypropylene glycol ethylene oxide adducts, as well as polyhydric alcohol type surfactants such as fatty acid esters of glycerol, fatty acid esters of pentaerythritol, fatty acid esters of sorbitol and sorbitan, fatty acid esters of sucrose, alkyl ethers of polyhydric alcohols, and fatty acid amides of alkanolamines. These nonionic surfactants may be used alone or in combination of two or more.

[0037] As cationic surfactants, specifically, there are quaternary ammonium salts such as alkyl (C6-C20) trimethylammonium salts, dialkyl (C6-C20) dimethylammonium salts, and alkyl (C6-C20) dimethylbenzylammonium salts, alkyl (C6-C20) amine salts, alkyl (C6-C20) amine ethylene oxide adducts, alkylpyridinium salts, etc. These cationic surfactants may be used alone or in combination of two or more.

[0038] As amphoteric surfactants, specifically, there are amino acid type surfactants such as alkylaminopropionates having an alkyl group with an average carbon number of 10-16, betaine type surfactants such as alkyl dimethyl betaines having an alkyl group with an average carbon number of 10-16, lauryl hydroxyethyl betaine, etc. These amphoteric surfactants may be used alone or in combination of two or more.

[0039] Among the various surfactants described above, examples of the salt form include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as magnesium and calcium, ammonium salts, amine salts, and acid addition salts such as hydrochloride salts.

[0040] Among these surfactants, anionic surfactants are preferred, and alkenyl sulfonates (α-olefin sulfonic acids) and alkyl sulfacetates are more preferred.

[0041] These surfactants may be used alone or in combination of two or more.

[0042] Regarding the content of component (C) in the cleaning composition, it may be appropriately set according to the type of surfactant used, the object to be cleaned, etc. For example, 1 to 10% by weight, preferably 2 to 8% by weight, and more preferably 3 to 6% by weight can be mentioned.

[0043] ·(D) bleaching agent The cleaning composition used in the present invention may contain a bleaching agent (which may also be denoted as “component (D)”) in addition to the components described above. By containing a bleaching agent, the cleaning effect can be further improved.

[0044] The type of the bleaching agent is not particularly limited. For example, chlorine-based bleaching agents, oxygen-based bleaching agents, reducing bleaching agents, etc. can be mentioned.

[0045] Examples of the chlorine-based bleaching agent include dichloroisocyanurate salts, hypochlorite salts, etc. Specific examples of the dichloroisocyanurate salt include alkali metal salts such as sodium salt and potassium salt. Specific examples of the hypochlorite salt include alkali metal salts such as sodium salt and potassium salt.

[0046] Examples of oxygen-based bleaching agents include, for example, bisulfate, persulfate, percarbonate, perborate, tetraacetylethylenediamine, and the like. Specific examples of bisulfate include alkali metal salts such as lithium salt, sodium salt, and potassium salt; alkaline earth metal salts such as barium salt; ammonium salt; hydrates thereof, and the like. Note that bisulfate may be a double salt with bisulfate or sulfate. Specific examples of persulfate include alkali metal salts such as sodium salt and potassium salt; ammonium salt; hydrates thereof, and the like. Specific examples of percarbonate include alkali metal salts such as sodium salt and potassium salt; ammonium salt; hydrates thereof, and the like. Specific examples of perborate include alkali metal salts such as sodium salt and potassium salt; ammonium salt; hydrates thereof, and the like.

[0047] Specific examples of reducing bleaching agents include thiourea dioxide, hydrosulfite, and the like.

[0048] Among these bleaching agents, chlorine-based bleaching agents are preferred, and dichloroisocyanurate is more preferred.

[0049] These bleaching agents may be used alone or in combination of two or more.

[0050] When the (D) component is contained in the cleaning composition, its content may be appropriately set according to the type of bleaching agent used, the object to be cleaned, and the like. For example, 3 to 25% by weight, preferably 5 to 15% by weight, more preferably 7 to 10% by weight can be mentioned.

[0051] ·(E) heat-generating agent The cleaning composition used in the present invention may contain a heat-generating agent (sometimes referred to as the “(E) component”) in addition to the above-described components. By including a heat-generating agent, it becomes possible to more effectively suppress a decrease in the amount of foam at low water temperatures.

[0052] As the heat generating agent, any agent that generates heat upon contact with water may be used. Examples include inorganic acid salts of calcium such as calcium oxide, calcium chloride, calcium sulfate, and calcium carbonate; inorganic acid salts of magnesium such as magnesium sulfate and magnesium chloride; inorganic acid salts of aluminum such as aluminum sulfate and aluminum chloride; inorganic acid salts of zinc such as zinc chloride and zinc sulfate; inorganic acid salts of iron such as ferric chloride and ferrous sulfate.

[0053] Among these heat generating agents, inorganic acid salts of calcium and inorganic acid salts of magnesium are preferred, and calcium oxide and magnesium sulfate are more preferred.

[0054] These heat generating agents may be used alone or in combination of two or more.

[0055] When the (E) component is contained in the cleaning composition, the content may be appropriately set according to the type of heat generating agent used, the heat generating characteristics to be imparted, etc. For example, 3 to 25% by weight, preferably 5 to 15% by weight, more preferably 7 to 10% by weight can be mentioned.

[0056] ·(F) carbonate, double salt of hydrogen carbonate and carbonate The cleaning composition used in the present invention may contain, in addition to the above-described components, a carbonate and / or a double salt of a hydrogen carbonate and a carbonate (sometimes referred to as the “(F) component”). By including a carbonate and / or a double salt of a hydrogen carbonate and a carbonate, a further increase in the amount of foaming can be achieved.

[0057] As long as the carbonate and the double salt of a hydrogen carbonate and a carbonate are water-soluble, the type thereof is not particularly limited. For example, as the carbonate, alkali metal salts of carbonic acid such as sodium carbonate and potassium carbonate can be mentioned, and as the double salt of a hydrogen carbonate and a carbonate, sodium sesquicarbonate etc. can be mentioned.

[0058] The carbonate and / or the double salt of a hydrogen carbonate and a carbonate may be used alone or in combination of two or more.

[0059] When the component (F) is contained in the cleaning composition, its content is not particularly limited, and examples thereof include 1 to 40% by weight, preferably 2 to 25% by weight, more preferably 3 to 15% by weight.

[0060] ·other components In addition to the aforementioned components, the cleaning composition used in the present invention may contain other additives as necessary. Examples of such additives include chelating agents, pH adjusters, enzymes, colorants, fragrances, deodorants, foam stabilizers, preservatives, antibacterial and bactericidal agents, antiseptics, rust preventives, extenders, and the like.

[0061] ·shape · capacity The shape of the cleaning composition used in the present invention is not particularly limited and may be in any form such as powder or granule, but powder form is preferred.

[0062] In the foaming detergent of the present invention, the amount of the cleaning composition contained per water-soluble packaging material is not particularly limited and may be appropriately set in consideration of ease of use. However, it is desirable to set the amount of the cleaning composition contained per water-soluble packaging material to the amount required for one cleaning. For example, when the foaming detergent of the present invention is used for cleaning a toilet bowl, the amount used per time may be about 10 to 200 g, preferably about 20 to 180 g, more preferably about 50 to 150 g, and particularly preferably about 80 to 150 g of the cleaning composition per water-soluble packaging material.

[0063] [Water-soluble packaging material] In the foaming detergent of the present invention, a water-soluble packaging material is included as a member for containing the cleaning composition. The water-soluble packaging material may be formed of a material that can wrap the cleaning composition and dissolve when it comes into contact with water. Examples of the material of the water-soluble packaging material include water-soluble films and water-soluble papers.

[0064] A water-soluble film is a film formed from a water-soluble polymer. Examples of water-soluble polymers that serve as constituent materials for water-soluble films include celluloses such as methylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, and sodium carboxymethylcellulose; starches such as soluble starch, sodium starch glycolate, and sodium starch phosphate; natural polysaccharides such as pectin, carrageenan, locust bean gum, guar gum, gum arabic, tragacanth gum, xanthan gum, and sodium alginate; gelling agents such as polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, sodium polyacrylate, and propylene glycol alginate; and proteins such as gelatin and sodium caseinate. In a water-soluble film, these water-soluble polymers may be contained alone or in combination of two or more.

[0065] Water-soluble paper is paper made by papermaking using water-soluble fibers or paper made by papermaking using non-water-soluble fibers and then treated to be water-soluble. Examples of paper made by papermaking using water-soluble fibers include paper made by papermaking using the fibers of the water-soluble polymers described above. Examples of paper made by papermaking using non-water-soluble fibers and then treated to be water-soluble include paper made by papermaking using the fibers of non-water-soluble polymers and then subjected to alkali treatment with an aqueous sodium hydroxide solution or aqueous ammonia to make it water-soluble.

[0066] Examples of materials for water-soluble packaging materials preferably include films formed from water-soluble polymers, and more preferably films formed from polyvinyl alcohol.

[0067] The shape of the water-soluble packaging material is not particularly limited and may be any of a bag shape, box shape, cup shape, etc., but a bag shape is preferably mentioned. Also, the size of the water-soluble packaging material may be appropriately set according to the amount of the cleaning composition to be contained.

[0068] [Manufacturing Method] The foaming detergent of the present invention is produced by filling the cleaning composition from the opening of the water-soluble packaging material. After filling the cleaning composition from the opening of the water-soluble packaging material, it is desirable that the opening is sealed with heat seal, water-soluble paste, or the like.

[0069] [Object to be cleaned · Method of use] The object to be cleaned with the foaming detergent of the present invention is not particularly limited, and examples include toilet bowls, drain pipes, sinks, washing tubs, bathtubs, etc. Among these, a toilet bowl is preferably mentioned.

[0070] The foaming detergent of the present invention is used by immersing it in water inside the object to be cleaned while the cleaning composition is contained in the water-soluble packaging material. When the foaming detergent of the present invention is immersed in water inside the object to be cleaned, the water-soluble packaging material gradually dissolves, and at the same time, the cleaning composition comes into contact with water, and the foaming action by the component (A) and the surfactant action by the component (C) are manifested, and the object to be cleaned is cleaned. If water is stored inside the object to be cleaned such as a toilet bowl, the foaming detergent of the present invention can be simply put in. Also, if water is not stored inside the object to be cleaned, running water can be introduced into the object to be cleaned to store water before or after putting in the foaming detergent of the present invention.

Examples

[0071] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples.

[0072] The trade names and sources of the hydrogen carbonates used in the following examples and comparative examples are as follows, and the particle size distribution and average particle diameter measured by the sieve test method are as shown in Table 1. ·Sodium hydrogen carbonate A : "Sodium bicarbonate M grade" (Tokuyama Corporation) ·Sodium hydrogen carbonate B : "Sodium bicarbonate P grade" (Tokuyama Corporation) ·Sodium hydrogen carbonate C: "Sodium Bicarbonate E Grade" (Tokuyama Corporation)

[0073]

Table 1

[0074] Test Example 1 The components shown in Table 2 were mixed to prepare a powdery cleaning composition. 120 g of the obtained cleaning composition was placed in a water-soluble packaging material made of a water-soluble film (made of polyvinyl alcohol, trade name "Hycelon", Nippon Gohsei Chemical Industry Co., Ltd.) processed into a bag shape with a length of 10 cm and a width of 14 cm, and then heat-sealed and sealed to produce a foaming detergent.

[0075] One bag of the obtained foaming detergent was put into a toilet bowl whose water temperature was adjusted to 5°C, and the foaming state was observed over time. Also, for comparison, 120 g of the cleaning composition was put into a toilet bowl whose water temperature was adjusted to 5°C without being placed in a water-soluble packaging material, and the foaming state was observed over time.

[0076] The results of observing the foaming state 3 minutes and 10 minutes after the foaming detergent or the cleaning composition was put in are shown in Figure 1. From these results, it was confirmed that the amount of foam was significantly larger when the powdery cleaning composition was put in while being contained in a water-soluble packaging material than when it was put in as it was.

[0077]

Table 2

[0078] Test Example 2 The components shown in Tables 3 and 4 were mixed to prepare a powdery cleaning composition. 10 g of the obtained cleaning composition was placed in a water-soluble packaging material made of a water-soluble film (made of polyvinyl alcohol, trade name "Hycelon", Nippon Gohsei Chemical Industry Co., Ltd.) processed into a bag shape with a length of 6.1 cm and a width of 4.1 cm, and then heat-sealed and sealed to produce a foaming detergent. In Comparative Example 2, it was not placed in a water-soluble packaging material.

[0079] Put 500 mL of ion-exchanged water into a 2 L graduated cylinder. After adjusting the temperature to 5°C or 25°C, add one bag of each foaming detergent or 10 g of the cleaning composition of Comparative Example 2 into the graduated cylinder. Then, observe the state of foam generation, and at the time when the foam volume reaches the maximum (1 to 10 minutes after addition), read the scale of the graduated cylinder to obtain the maximum foam volume (the maximum value of the generated foam volume).

[0080] The obtained results are shown in Tables 3 and 4. As is clear from the comparison between Example 2 and Comparative Example 2, the cleaning composition containing an acid, sodium hydrogen carbonate, and a surfactant has a larger foam volume at normal temperature (25°C) and low temperature (5°C) when immersed in a water-soluble packaging material than when immersed directly in water, and the decrease in foam volume at low temperature (5°C) can also be suppressed. Furthermore, even when the cleaning composition is contained in a water-soluble packaging material, using sodium hydrogen carbonates A and B with a particle size ratio of less than 180 μm of 30% or more results in a larger maximum foam volume at 25°C and 5°C and can suppress the decrease in foam volume at low temperature (5°C) compared to using sodium hydrogen carbonate C with a particle size ratio of less than 180 μm of 12%. In particular, when using sodium hydrogen carbonate B with a particle size ratio of less than 180 μm of 100%, the foam volume at normal temperature (25°C) and low temperature (5°C) becomes significantly larger, and the decrease in foam volume at low temperature (5°C) is also significantly smaller.

[0081] [Table 3]

[0082] [Table 4]

Claims

1. A cleaning composition is contained in a water-soluble packaging material, The cleaning composition contains (A) an acid, (B) a hydrogen carbonate, and (C) a surfactant, In the hydrogen carbonate, the proportion of particles less than 180 μm occupies 30% by weight or more, In the hydrogen carbonate, the proportion of particles of 63 μm or more and less than 180 μm is 50 to 90% by weight, The material of the water-soluble packaging material is a polyvinyl alcohol film, and It is a foaming cleaner for cleaning a toilet bowl.

2. A cleaning composition is contained in a water-soluble packaging material, The cleaning composition contains (A) an acid, (B) a hydrogen carbonate, and (C) a surfactant, In the hydrogen carbonate, the proportion of particles less than 180 μm occupies 30% by weight or more, In the hydrogen carbonate, the proportion of particles of 63 μm or more and less than 180 μm is 50 to 90% by weight, and The material of the water-soluble packaging material is a polyvinyl alcohol film, a foaming cleaner.

3. Among the hydrogen carbonates, the proportion of particles of 45 μm or more and less than 180 μm occupies 50% by weight or more, the foaming cleaner according to claim 1 or 2.

4. Among the hydrogen carbonates, the proportion of particles less than 106 μm occupies 80% by weight or more, the foaming cleaner according to any one of claims 1 to 3.

5. The hydrogen carbonate is sodium hydrogen carbonate, the foaming cleaner according to any one of claims 1 to 4.

6. The acid is an organic acid, the foaming cleaner according to any one of claims 1 to 5.

7. The cleaning composition further contains a bleaching agent, the foaming cleaner according to any one of claims 1 to 6.

8. A cleaning method of immersing the foaming detergent according to any one of claims 1 to 7 in water inside a toilet bowl.

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