Discharge products

Abstract

To provide a discharge product capable of discharging three-dimensional foam body with a large surface area and a cavity formed inside and having excellent foam retentionability and active ingredient diffusivity, and capable of forming the foam body discharged without scattering on a discharge member.SOLUTION: The discharge product that includes a discharge container filled with an effervescent aerosol composition and the discharge member attached to the discharge container for discharging the effervescent aerosol composition. The effervescent aerosol composition comprises a stock solution and a liquefied gas, the stock solution contains a surfactant and water. Content of the liquefied gas is 20 to 55 vol.% in the effervescent aerosol composition. The discharge member includes an internal passage extending in an axial direction and an opening portion in communication with the internal passage, opening at a side surface of the discharge member. The opening portion constitutes an opening portion, has a pair of side surfaces for controlling a discharge direction of the effervescent aerosol composition when the effervescent aerosol composition is discharged, and the side surfaces have twisted shapes around an axis of the discharge member.SELECTED DRAWING: Figure 1

Description

[[Technical Field]]

[0001] The present invention relates to a discharge product. More specifically, the present invention relates to a discharge product that can discharge a three-dimensional foam having a large surface area, a cavity formed inside, excellent retention and diffusibility of an active ingredient, and that allows the obtained foam to be formed on a discharge nozzle without splashing. [[Background Art]]

[0002] Conventionally, discharge products that discharge contents in the form of foam are known (for example, Patent Document 1). Patent Document 1 discloses a discharge nozzle for an effervescent content (effervescent aerosol composition). This discharge nozzle is formed with an axially extending internal passage and an opening that opens on a side surface of the internal passage. When this discharge nozzle is used, the discharged foam swirls along the side surface of the discharge nozzle to form a shape like soft serve ice cream, which is excellent in aesthetic appearance. [[Prior Art Documents]] [[Patent Documents]]

[0003] [[Patent Document 1]] Japanese Unexamined Patent Publication No. 2019-59497 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] The foam obtained by the invention described in Patent Document 1 tends to lose its shape and drip easily over time, so there is room for improvement in terms of foam retention. Furthermore, it cannot be said that the foam obtained by the invention described in Patent Document 1 has a sufficiently large surface area, so there is room for improvement in the diffusibility of the active ingredient. In order to increase the surface area of the foam, it is conceivable to increase the proportion of the propellant. However, when the proportion of the propellant is increased, the discharge momentum becomes stronger, and the discharged material tends to splash easily.

[0005] The present invention has been made in view of the above-mentioned conventional problems, and aims to provide a discharge product that can discharge a three-dimensional foam with a large surface area and internal cavities, which has excellent retention and diffusion properties for active ingredients, and that can form the resulting foam on a discharge member without scattering. [Means for solving the problem]

[0006] The present invention, which solves the above problems, mainly includes the following configuration.

[0007] (1) A dispensing product comprising: a dispensing container filled with an effervescent aerosol composition; and a dispensing member attached to the dispensing container for dispensing the effervescent aerosol composition, wherein the effervescent aerosol composition consists of a stock solution and a liquefied gas, the stock solution contains a surfactant and water, and the content of the liquefied gas is 20 to 55% by volume of the effervescent aerosol composition; the dispensing member has an internal passage extending in the axial direction and an opening that communicates with the internal passage and opens on the side surface of the dispensing member, the opening having a pair of sides that constitute the opening and control the dispensing direction of the effervescent aerosol composition when the effervescent aerosol composition is dispensed, and the sides are twisted in shape along the axis of the dispensing member.

[0008] With this configuration, the dispensed product can form a foamy mass on the dispensing member without scattering. Furthermore, the dispensed product has an internal cavity, resulting in a large surface area and a three-dimensional foamy mass with excellent retention and diffusion properties for the active ingredients.

[0009] (2) The liquefied gas is the discharge product according to (1), which contains a hydrofluoroolefin.

[0010] With this configuration, the resulting foam has a moderate hardness and a larger surface area. Therefore, the dispensed product is more likely to be a foam with a three-dimensional structure, better retention, and better diffusion of the active ingredient.

[0011] (3) The dispensed product according to (1) or (2), wherein the surfactant includes an anionic surfactant.

[0012] With this configuration, the foam of the discharged product has an appropriate hardness and can be formed on the discharge member without scattering.

[0013] (4) The dispensed product according to (1) or (2), wherein the hardness of the foam dispensed from the effervescent aerosol composition is 100 to 550 mN (25°C).

[0014] With this configuration, the extruded product is likely to be a three-dimensional, sufficiently firm foam with excellent retention properties. [Effects of the Invention]

[0015] According to the present invention, it is possible to discharge a foam that has a large surface area, an internal cavity, is three-dimensional, and has excellent retention and diffusion properties for active ingredients, and the resulting foam can be formed on the discharge member without scattering. [Brief explanation of the drawing]

[0016] [Figure 1] Figure 1 is a schematic cross-sectional view of an extruded product according to one embodiment of the present invention. [Figure 2] Figure 2 is a schematic front view of the discharge nozzle. [Figure 3] Figure 3 is a schematic plan view of the discharge nozzle. [Figure 4] Figure 4 is a photograph of the appearance of the foam body discharged in Example 1. [Figure 5] Figure 5 is a photograph of the appearance of the foam body of Comparative Example 2 that was discharged. [Modes for carrying out the invention]

[0017] <Discharged products> A discharge product according to an embodiment of the present invention comprises a discharge container filled with a foamable aerosol composition, and a discharge member attached to the discharge container for discharging the foamable aerosol composition. The foamable aerosol composition consists of a stock solution and a liquefied gas. The stock solution contains a surfactant and water. The content of the liquefied gas is 20 to 55% by volume in the foamable aerosol composition. The discharge member is formed with an axially extending internal passage, and an opening that communicates with the internal passage and opens on a side surface of the discharge member. The opening constitutes the opening and has a pair of side surfaces for controlling the discharge direction of the foamable aerosol composition when the foamable aerosol composition is discharged. The side surfaces have a twisted shape along the axis of the discharge member. Each of these will be described below.

[0018] (Foamable Aerosol Composition) The foamable aerosol composition (hereinafter also referred to as an aerosol composition) consists of a stock solution and a liquefied gas. The stock solution and the liquefied gas are emulsified.

[0019] • Stock Solution The stock solution contains a surfactant and water.

[0020] The surfactant is blended to emulsify the stock solution and the liquefied gas in the aerosol container. Further, the surfactant is used for foaming when discharged to the outside to form a foam around the discharge member. The surfactant is not particularly limited. For example, the surfactant is an anionic surfactant, a nonionic surfactant, a cationic surfactant, an amphoteric surfactant, a natural surfactant, a silicone-based surfactant, or the like. The surfactant preferably contains an anionic surfactant from the viewpoint that it easily facilitates formation of a foam having a characteristic shape on the discharge member. Further, two or more surfactants may be used in combination.

[0021] The anionic surfactant is suitable for adjusting hardness and foam specific gravity that easily facilitate formation of a foam having a characteristic shape on the discharge member.

[0022] Anionic surfactants are not particularly limited. For example, anionic surfactants include saponified fatty acids, alkyl sulfates, polyoxyethylene alkyl ether sulfates, N-acyl amino acid salts, N-acyl methyl taurate salts, polyoxyethylene alkyl ether acetates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, higher alkyl sulfate esters such as sodium lauryl sulfate and potassium lauryl sulfate, alkyl ether sulfate esters such as polyoxyethylene lauryl sulfate triethanolamine and polyoxyethylene lauryl sulfate sodium, N-acyl sarcosinic acids such as sodium lauroyl sarcosinate, higher fatty acid amide sulfonates such as sodium N-myristoyl-N-methyl taurate, sodium coconut oil fatty acid methyl taurate, and sodium lauryl methyl taurate, phosphate esters such as sodium polyoxyethylene oleyl ether phosphate and polyoxyethylene stearyl ether phosphate, sodium di-2-ethylhexyl sulfosuccinate, and monolauroyl monoethanolamide polyoxyethylene These include sulfosuccinates such as sodium sulfosuccinate and sodium lauryl polypropylene glycol sulfosuccinate, alkylbenzene sulfonates such as sodium linear dodecylbenzenesulfonate, linear dodecylbenzenesulfonate triethanolamine, and sodium linear dodecylbenzenesulfonate, N-acyl glutamates such as monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, and monosodium N-myristoyl-L-glutamate, higher fatty acid ester sulfates such as sodium hydrogenated coconut oil fatty acid glycerin sulfate, sulfurized oils such as belladonna oil, polyoxyethylene alkyl ether carboxylic acid, polyoxyethylene alkyl allyl ether carboxylic acid salt, α-olefin sulfonate, higher fatty acid ester sulfonate, secondary alcohol sulfate, higher fatty acid alkylolamide sulfate, sodium lauroyl monoethanolamide succinate, N-palmitoyl aspartate ditriethanolamine, and sodium caseinate. Among these, anionic surfactants are preferable because they are light and easily produce stable foam over long periods of time, and therefore contain saponified fatty acids.

[0023] The saponified fatty acids are not particularly limited. For example, saponified fatty acids include reaction products of fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, oleic acid, linoleic acid, and linolenic acid with alkalis such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, triethanolamine, and diethanolamine.

[0024] Nonionic surfactants include glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene castor oil / hydrogenated castor oil derivatives, polyoxyethylene lanolin / lanolin alcohol / beeswax derivatives, fatty acid alkylolamides, etc.

[0025] Cationic surfactants include alkylammonium salts and alkylbenzylammonium salts.

[0026] Amphoteric surfactants include lauryldimethylaminoacetic acid betaine (lauryl betaine), stearyl betaine, lauric acid amidopropyl betaine, lauryl hydroxysulfobetaine, stearyldimethylaminoacetic acid betaine, and coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine (cocamidopropyl betaine).

[0027] Examples of natural surfactants include sodium surfactant, cyclodextrin, and hydrogenated soy lecithin.

[0028] Silicone-based surfactants include polyoxyethylene-methylpolysiloxane copolymers, polyoxypropylene-methylpolysiloxane copolymers, and poly(oxyethylene-oxypropylene)-methylpolysiloxane copolymers.

[0029] The surfactant content is not particularly limited. For example, the surfactant content is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more, in the undiluted solution, in order to emulsify the undiluted solution and the liquefied gas and to easily form a foam body with the liquefied gas content described later. Furthermore, in order to reduce the amount of residue adhering to the dispensing member after use, the surfactant content is preferably 30% by mass or less, and more preferably 25% by mass or less, in the undiluted solution.

[0030] Water is used as a solvent and is added to adjust the viscosity of the stock solution or aerosol composition.

[0031] The type of water is not particularly limited. For example, the water could be purified water, deionized water, physiological saline, or deep-sea water.

[0032] The water content is not particularly limited. For example, the water content is preferably 50% by mass or more, and more preferably 60% by mass or more, in the stock solution. Furthermore, the water content is preferably 99.5% by mass or less, and more preferably 99.0% by mass or less, in the stock solution. By having the water content within the above range, the viscosity of the stock solution and aerosol composition can be easily adjusted appropriately.

[0033] In addition to the surfactant and water mentioned above, the stock solution may also contain, as appropriate, active ingredients, lower alcohols, polyhydric alcohols, oil components, water-soluble polymers, powders, etc. Any of these may be used in combination.

[0034] The active ingredients are appropriately selected according to the intended use and application of the dispensed product. For example, the active ingredients may include hydrocarbon fragrances such as limonene, α-pinene, β-pinene, δ-pinene, camphene, sabinene, α-terpinene, β-terpinene, and γ-terpinene; n-heptyl alcohol, n-octyl alcohol, n-nonyl alcohol, benzyl alcohol, 2-methyl-1-hexanol, 3-methyl-1-hexanol, citronellol, geraniol, linalool, L-menthol, methyl-n-butylcarbinol, methylethylisopropylcarbinol, and methylhexylcarbinol. Alcohol-based fragrances such as methylphenylcarbinol, ethylphenylcarbinol, methylbenzylcarbinol, phenylethyl alcohol, γ-phenylpropyl alcohol, α-terpineol, dihydromyrcenoyl; isobutyl acetate, n-amyl acetate, isoamyl acetate, n-hexyl acetate, n-octyl acetate, n-decyl acetate, benzyl acetate, β-phenylethyl acetate, geranyl acetate, bornyl acetate, l-menthyl acetate, linalyl acetate Tate, n-amylpropinate, isoamylpropinate, linalylpropinate, benzylpropinate, ethyl butyrate, isopropyl butyrate, n-hexyl butyrate, benzyl butyrate, ethyl isobutyrate, isopropyl isobutyrate, n-butyl isobutyrate, isoamyl isobutyrate, benzyl isobutyrate, ethyl valerate, n-butyl valerate, isoamyl valerate, n-heptyl valerate, benzyl valerate, ethyl isovalerate, n-propyl valerate, iso Ester fragrances such as amyl isovalerate, methyl benzoate, ethyl benzoate, isobutylphenyl acetate, and methyl salicylate; aldehyde fragrances such as n-octyl aldehyde, n-nonyl aldehyde, n-decyl aldehyde, citronellal, citral, phenylacetaldehyde, and salicylaldehyde; ketone fragrances such as ethyl isoamyl ketone, methylheptenone, acetophenone, benzalacetone, o-aminoacetophenone, camphor, menthone, and methyl-n-amyl ketonecarvone;Ether-based fragrances such as geranyl methyl ether, 1,8-cineole, 1,4-cineole, ethyl benzyl ether, and estragole; phenol-based fragrances such as p-crezyl ethyl ether, anethole, and eugenol; synthetic fragrances such as single fragrances and blended fragrances using said single fragrances; various fragrances such as natural plant-based fragrances such as orange oil, grapefruit oil, peppermint oil, spearmint oil, rose oil, lavender oil, lemon oil, lemon eucalyptus, cajeput, clary sage, and coriander; methyl benzoate, benzyl acetate, methacrylate lauryl benzoate, methyl phenylacetate, geranyl chloride, and acetate myristate. These include deodorants such as tophenone, benzyl acetate, and benzyl propionate; disinfectants such as parahydroxybenzoic acid esters, sodium benzoate, potassium sorbate, phenoxyethanol, benzalkonium chloride, benzethonium chloride, chlorhexidine chloride, photosensitizers, parachlormethacresol, thymol, carvacrol, and phenoxyethanol; cooling agents such as 1-menthol and camphor; insect repellents such as N,N-diethyl-m-toluamide (DEET), diethylcaprylate, naphthalene, and camphor; and insecticides such as transfluthrin, metofluthrin, phthalthrin, allethrin, permethrin, tefluthrin, and benfluthrin.

[0035] When an active ingredient is included, the amount of the active ingredient is not particularly limited. For example, the amount of the active ingredient is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, in the undiluted solution, in order to fully exert the effect of the included active ingredient. Furthermore, the amount of the active ingredient is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution, in order to easily obtain an appropriate effect.

[0036] Lower alcohols are suitably added to adjust foaming properties such as foam retention time, foam size (foam specific gravity), foam quality, and hardness, as they serve as solvents for the active ingredients and improve drying speed.

[0037] Lower alcohols are not particularly limited. For example, lower alcohols include monohydric alcohols with 2 to 3 carbon atoms, such as ethyl alcohol and isopropyl alcohol.

[0038] When lower alcohols are included, the amount of lower alcohol is not particularly limited. For example, the amount of lower alcohol in the stock solution is preferably 1% by mass or more, and more preferably 3% by mass or more. Furthermore, the amount of lower alcohol in the stock solution is preferably 30% by mass or less, and more preferably 25% by mass or less. When the amount of lower alcohol is within the above range, the emulsification between the stock solution and the liquefied gas is less likely to be inhibited in the aerosol composition, and the effects of including lower alcohol are more easily achieved.

[0039] Polyhydric alcohols are suitably added to act as solvents for the active ingredients, to adjust drying properties, and to adjust foam specific gravity and hardness.

[0040] Polyhydric alcohols are not particularly limited. Examples include glycerin, diglycerin, ethylene glycol, propylene glycol, 1,3-butylene glycol, diethylene glycol, and polyethylene glycol.

[0041] When polyhydric alcohols are included, the polyhydric alcohol content is not particularly limited. For example, the polyhydric alcohol content is preferably 1% by mass or more, and more preferably 3% by mass or more, in the undiluted solution. Furthermore, the polyhydric alcohol content is preferably 20% by mass or less, and more preferably 15% by mass or less, in the undiluted solution. By keeping the polyhydric alcohol content within the above range, the aerosol composition is more likely to exhibit the effects of incorporating polyhydric alcohols.

[0042] The oil component is suitably blended to adjust the viscosity of the undiluted solution and the stability of the foam. To improve the stability of the foam, the oil component is preferably a paste-like or solid oil component at room temperature.

[0043] The oil components are not particularly limited. Examples include higher alcohols such as cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and lanolin alcohol; hydrocarbons such as paraffin wax and microcrystalline wax; oil components that are paste-like or solid at room temperature, such as waxes such as beeswax, lanolin, lanolin acetate, and candelilla wax; silicone oils such as methylpolysiloxane, decamethyltetrasiloxane, octamethylcyclotetrasiloxane, and methylphenylpolysiloxane; n-pentane, isopentane, n-hexane, iso These are oil components that are liquid at room temperature, such as hydrocarbon oils like hexane, liquid paraffin, isoparaffin, kerosene, squalane, and squalene; ester oils like isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, ethyl acetate, diethyl phthalate, diethoxyethyl phthalate, and diethoxyethyl succinate; higher alcohols like lauryl alcohol and oleyl alcohol; and oils and fats like camellia oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, linseed oil, safflower oil, jojoba oil, and coconut oil. Of the oil components that are liquid at room temperature, hydrocarbons with 5 to 6 carbon atoms, such as n-pentane, isopentane, n-hexane, and isohexane, may be blended into the liquefied gas described later to adjust the foaming ratio and foaming time.

[0044] When an oil component is included, the amount of the oil component is not particularly limited. For example, the amount of the oil component is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more, in the undiluted solution. Furthermore, the amount of the oil component is preferably 20% by mass or less, and more preferably 10% by mass or less, in the undiluted solution. When the amount of the oil component is within the above range, the foam is easily retained on the dispensing member.

[0045] Water-soluble polymers are suitably blended to adjust foam quality, such as foam retention time, hardness, and drying properties.

[0046] The water-soluble polymer is not particularly limited. Examples of water-soluble polymers include cellulose nanofibers, carrageenan, pectin, starch, gelatin, collagen, carboxymethyl starch, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, hydroxypropylmethylcellulose, carboxyvinyl polymer, and xanthan gum. Among these, cellulose nanofibers and gelatin are preferred as water-soluble polymers because they enhance the shape retention when the foam expands significantly due to the vaporization of the liquefied gas, making it easier to form light foam and resulting in foam with excellent drying properties. In particular, cellulose nanofibers are suitably blended to facilitate emulsification between the stock solution and the liquefied gas and to stabilize the emulsion.

[0047] When a water-soluble polymer is included, the content of the water-soluble polymer is not particularly limited. For example, the content of the water-soluble polymer is preferably 0.001% by mass or more, and more preferably 0.003% by mass or more, in the undiluted solution. Furthermore, the content of the water-soluble polymer is preferably 10% by mass or less, and more preferably 8% by mass or less, in the undiluted solution. When the content of the water-soluble polymer is within the above range, the aerosol composition is light and easily produces a three-dimensional foam.

[0048] Powders can act as active ingredients themselves, or as carriers that support other active ingredients, emulsifying agents, adhesives, lubricants, and so on.

[0049] The powder is not particularly limited. Examples of powders include silica, talc, zinc oxide, carbonic acid, mica, magnesium carbonate, calcium carbonate, zinc silicate, magnesium silicate, aluminum silicate, calcium silicate, zeolite, ceramic powder, boron nitride, etc.

[0050] When powder is incorporated, the powder content is not particularly limited. For example, the powder content is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, in the undiluted solution. Furthermore, the powder content is preferably 15% by mass or less, and more preferably 10% by mass or less, in the undiluted solution. The above effects are more easily obtained when the powder content is within the above range.

[0051] Returning to the overall description of the stock solution, the amount of stock solution is not particularly limited. For example, the amount of stock solution in the aerosol composition may be 45% by volume or more, and preferably 50% by volume or more. Alternatively, the amount of stock solution in the aerosol composition may be 80% by volume or less, and preferably 75% by volume or less. When the amount of stock solution is within the above range, the aerosol composition is easily emulsified between the stock solution and the liquefied gas. Furthermore, the discharged product of the resulting aerosol composition is light and easily forms a three-dimensional foam.

[0052] The method for preparing the stock solution is not particularly limited. The stock solution can be prepared by conventionally known methods. For example, the stock solution can be prepared by adding a surfactant or the like to water and mixing them.

[0053] • Liquefied gas The liquefied gas is a liquid with vapor pressure inside the aerosol container. When discharged from the aerosol container, it vaporizes, and the resulting volume expansion causes the undiluted liquid to foam, forming a light foam.

[0054] The liquefied gas is not particularly limited. For example, the liquefied gas may be liquefied petroleum gas, which is propane, n-butane, isobutane and mixtures thereof; hydrofluoroolefins such as dimethyl ether and trans-1,3,3,3-tetrafluoropropene; and mixtures thereof. It is preferable that the liquefied gas contains hydrofluoroolefins because it tends to increase the surface area of ​​the foam, and makes it easier to obtain a foam that is more sterically structured, has better retention and diffusion of the active ingredient.

[0055] The liquefied gas content in the aerosol composition may be 20% by volume or more, and preferably 25% by volume or more. Furthermore, the liquefied gas content may be 55% by volume or less, and preferably 50% by volume or less. By having the liquefied gas content within the above range, the aerosol composition emulsifies easily with the undiluted liquid. Additionally, the discharged product of the resulting aerosol composition is light and easily forms a three-dimensional foam.

[0056] Returning to the overall description of aerosol compositions, the method for preparing an aerosol composition is not particularly limited. For example, an aerosol composition can be prepared by filling a pressure-resistant container body with the stock solution, holding a valve over the opening of the container body, filling the undercup with liquefied gas through the gap between the opening and the valve, and then fixing the valve to the container body. Alternatively, the liquefied gas may be filled through the valve after the valve has been fixed to the container body with the stock solution.

[0057] As described above, the aerosol composition used in the dispensed product of this embodiment contains a surfactant and water in its stock solution, and the stock solution and liquefied gas are emulsified. The foaming aerosol composition can be dispensed with a uniform composition, and the resulting foam is light and three-dimensional.

[0058] Specifically, the discharged product is adjusted to 25°C, and the foam density (g / mL) of the discharged foam is preferably 0.001 or higher, and more preferably 0.002 or higher. Furthermore, the foam density is preferably 0.05 or lower, and more preferably 0.04 or lower. Thus, according to this embodiment, a light, three-dimensional foam with a low foam density can be formed.

[0059] Furthermore, the hardness of the discharged foam (at 25°C) is preferably 100 mN or more, and more preferably 200 mN or more. Also, the hardness of the foam is preferably 550 mN or less, and more preferably 500 mN or less. By having the foam hardness within the above range, the discharged product can be a three-dimensional foam with a large surface area and internal cavities, exhibiting excellent retention and diffusion of the active ingredient. In this embodiment, the hardness of the foam (mN) can be measured using an EZ-Test (manufactured by Shimadzu Corporation) at the point when the foam breaks and the load changes significantly relative to the compression amount, after discharging an aerosol composition adjusted to 25°C into a bottomed cylindrical cup, filling the cup with foam, and applying a load to compress the foam.

[0060] (discharge container) Figure 1 is a schematic cross-sectional view of the dispensing product 1 of this embodiment. The dispensing product 1 comprises a dispensing container 2 filled with an effervescent aerosol composition and a dispensing member 3 attached to the dispensing container 2 for dispensing the effervescent aerosol composition.

[0061] The discharge container 2 comprises a container body 4 and a valve 5 attached to the container body 4.

[0062] The container body 4 is made of a metal such as aluminum, and has a bottom portion 4a, a body portion 4b rising from the outer circumference of the bottom portion 4a, and a shoulder portion 4c extending upward from the upper end of the body portion 4b while gradually decreasing in diameter. An opening 4d is provided at the upper end of the shoulder portion 4c. A bead portion 4e is formed around the opening.

[0063] The valve 5 comprises a bottomed cylindrical stem 6 with a stem hole 6a formed on its side, a housing 7 that houses the stem 6 so that it can move up and down, an elastic body (spring) 8 that constantly biases the stem 6 upward, a roughly donut-shaped stem rubber 9, a mounting cup 10 that fixes the housing 7 to the container body 4, and a tube 11 attached to the housing 7. An introduction hole 7a is formed on the bottom surface of the housing 7 for introducing the foaming aerosol composition C into the housing 7. The stem rubber 9 closes the stem hole 6a with its inner circumference when the stem 6 is biased upward, and when the stem 6 is pushed downward, the inner circumference flexes and opens the stem hole 6a. The valve 5 closes the opening 4d of the container body 4 by crimping the cylindrical portion of the mounting cup 10 to the bead portion 4e of the container body 4.

[0064] (Discharge component) The discharge member 3 comprises a substantially cylindrical shoulder cover 31 attached to the discharge container 2, an operating part 33 connected to the shoulder cover 31 via a hinge part 32, and a discharge nozzle 34 attached to the operating part 33.

[0065] The operating section 33 includes a mounting section 33a that is attached to the stem 6, an operating surface 33b located on the opposite side of the hinge section 32 when viewed from the mounting section 33a, and a nozzle base 33c for attaching the discharge nozzle 34. Since the mounting section 33a and the nozzle base 33c are in communication, the foaming aerosol composition C discharged from the discharge container 2 can be supplied into the discharge nozzle 34.

[0066] The discharge nozzle 34 has a roughly bullet-shaped section that tapers towards the tip. The discharge nozzle 34 has an internal passage 34a extending in the axial direction and an opening 34b. The opening 34b communicates with the internal passage 34a and opens on the side of the bullet section of the discharge nozzle 34. The lower end of the internal passage 34a communicates with the nozzle base 33c. On the other hand, the upper end of the internal passage 34a is closed.

[0067] The opening 34b is a slit formed along the axial direction (vertical direction) of the discharge nozzle 34. Figure 2 is a schematic front view of the discharge nozzle. Figure 3 is a schematic plan view of the discharge nozzle. As shown in Figures 2 and 3, the opening 34b in this embodiment has a twisted shape along the axis of the projectile portion of the discharge nozzle 34. The number of openings 34b is not particularly limited. In this embodiment, an example is shown in which four openings 34b are formed.

[0068] Each opening 34b has a pair of sides (sides 34c and side 34d). Sides 34c and 34d are connected at one end (the end in the direction of the upper end of the discharge nozzle 34) and at the other end (the end in the direction of the lower end of the discharge nozzle 34) via a bottom surface 34e. The pair of sides, together with the bottom surface 34e, constitute the inner circumferential surface of the opening 34b. The pair of sides also control the discharge direction of the foaming aerosol composition when the foaming aerosol composition is discharged.

[0069] The pair of sides (sides 34c and 34d) curve horizontally from the internal passage 34a outwards. That is, sides 34c and 34d are curved around the axis of the projectile section of the discharge nozzle 34. Furthermore, the arc formed by sides 34c and 34d is curved in the same direction as each other. The same applies to the sides that make up the other openings. The pair of sides (sides 34c and 34d) are inclined outwards so that the opening 34b opens wider outwards. Also, the pair of sides are narrower in width vertically from the bottom to the top and are joined at the top. The surface ends of the pair of sides are closer to the central axis of the nozzle section from the bottom to the top.

[0070] The lower surface 34e is an inclined surface that rises outward, as shown in Figure 1. The angle of the inclined surface is 60 to 85° with respect to the horizontal plane.

[0071] The material of the discharge member 3 is not particularly limited. For example, the material of the discharge member 3 may be synthetic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), nylon (NY), or polyacetal (POM). The discharge member 3 may also be made of rubber such as synthetic rubber or silicone rubber.

[0072] In this embodiment, the dispensing product 1 can dispense a foaming aerosol composition to the outside by pressing down the operating surface 33b of the dispensing member 3. Specifically, when the operating surface 33b is pressed down, the stem 6 is pressed down and the stem rubber 9 bends. This releases the blockage of the stem hole 6a by the stem rubber 9. As a result, the pressure of the liquefied gas draws the foaming aerosol composition into the tube 11 through the inlet hole 11a of the tube 11, flows through the inlet hole 7a of the housing 7, inside the housing 7, through the stem hole 6a and inside the stem 6 to the dispensing member 3, and is dispensed to the outside from the opening 34b of the dispensing nozzle 34. The foaming aerosol composition foams in the internal passage 34a and opening 34b of the dispensing member 3, changing into a firm foam. The pair of sides (sides 34c and 34d) that constitute the opening 34b of the dispensing nozzle 34 are twisted along the axis of the bullet part of the dispensing nozzle 34. Therefore, the foam of the aerosol composition discharged from the opening 34b is directed by a pair of side surfaces to adjust the flow path so that it is discharged along the outer surface of the bullet-shaped part of the discharge nozzle, as indicated by the arrows in Figure 3. As a result, the foam of the aerosol composition is discharged diagonally upward while maintaining a thin plate shape that conforms to the opening shape of the opening. As the discharged foam is continuously discharged, the flow of the thin plate-shaped foam discharged earlier is slowed by the pair of side surfaces that narrow towards the upper end, and it accumulates with the thin plate-shaped foam discharged later, forming a bent thin plate-shaped foam. Furthermore, since there are multiple openings (four in this embodiment), these bent thin plate-shaped foams accumulate, resulting in a large surface area and a three-dimensional foam as shown in Figure 4. The discharged foam has a low specific gravity and suitable hardness, so it has high retention on the discharge nozzle 34.

[0073] Furthermore, the foam body forms small folds as the later-discharged foam pushes up the earlier-discharged foam. These folds accumulate, causing the inner foam to separate from the projectile portion, forming a foam body with an internal cavity. The dispensed product of this embodiment has a liquefied gas content of 20-55% by volume in the foaming aerosol composition. As a result, the foam body has an appropriate foaming ratio, is less prone to scattering, and possesses an appropriate weight (foam specific gravity) and hardness. Consequently, the resulting foam body is three-dimensional and has high retention properties.

[0074] Furthermore, the resulting foam has a large surface area and excellent diffusion of the active ingredient. For this reason, the dispensed product of this embodiment is suitable as a deodorizer, air freshener, disinfectant, insect repellent, etc., for rooms and toilets. [Examples]

[0075] The present invention will be described more specifically below with reference to examples. The present invention is not limited in any way to these examples.

[0076] (Example 1) Stock solution A was prepared according to the formulation (unit: mass%) shown in Table 1 below, and 60 g of stock solution A was filled into the aluminum pressure vessel shown in Figure 1 according to the formulation shown in Table 2. Next, a valve was fixed to the opening of the pressure vessel to seal it. Furthermore, 40 g of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) was filled from the stem, and the stock solution and liquefied gas were emulsified to produce a discharge product containing the aerosol composition. The volume ratio of stock solution / liquefied gas was 64.1 / 35.9. The discharge product of Example 1 was discharged as shown in Figure 4, and a foam was formed.

[0077] [Table 1]

[0078] [Table 2]

[0079] (Example 2) As shown in Table 2, a discharge product containing the aerosol composition was prepared in the same manner as in Example 1, except that 70 g of stock solution A was filled and 30 g of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) was filled. The volume ratio of stock solution to liquefied gas was 73.5 / 26.5.

[0080] (Example 3) As shown in Table 2, a discharge product containing the aerosol composition was prepared in the same manner as in Example 1, except that 50 g of stock solution A was filled and 50 g of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) was filled. The volume ratio of stock solution to liquefied gas was 54.3 / 45.7.

[0081] (Example 4) As shown in Table 2, a discharge product containing the aerosol composition was prepared in the same manner as in Example 1, except that 75.8 g of stock solution A was filled and 24.2 g of liquefied petroleum gas (LPG) was filled. The volume ratio of stock solution to liquefied gas was 64.1 / 35.9.

[0082] (Example 5) Stock solution B was prepared according to the formulation (unit: mass%) shown in Table 3 below. An aerosol product containing the aerosol composition was prepared in the same manner as in Example 1, except that 60 g of stock solution B was filled and 40 g of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) was filled according to the formulation shown in Table 2. The volume ratio of stock solution to liquefied gas was 64.1 / 35.9.

[0083] [Table 3]

[0084] (Example 6) As shown in Table 2, a discharge product containing the aerosol composition was prepared in the same manner as in Example 1, except that 75.8 g of stock solution B was filled and 24.2 g of liquefied petroleum gas (LPG) was filled. The volume ratio of stock solution to liquefied gas was 64.1 / 35.9.

[0085] (Comparative Example 1) As shown in Table 2, a discharge product containing the aerosol composition was prepared in the same manner as in Example 1, except that 40 g of stock solution A was filled and 60 g of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) was filled. The volume ratio of stock solution to liquefied gas was 44.2 / 55.8.

[0086] (Comparative Example 2) As shown in Table 2, an aerosol product containing the aerosol composition was prepared in the same manner as in Example 1, except that 80 g of stock solution A was filled and 20 g of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) was filled. The volume ratio of stock solution to liquefied gas was 82.6 / 17.4. The product of Comparative Example 2 was dispensed as shown in Figure 5, and foam was formed.

[0087] The aerosol compositions prepared in Examples 1-6 and Comparative Examples 1-2 were evaluated for foam discharge, splashing, foam dripping, foam retention, and foam hardness using the following evaluation methods. The results are shown in Table 3.

[0088] <Discharge state of foam> The dispensed product, heated to 25°C, was dispensed upwards for 1 second to form a foam. The foam discharge state was evaluated according to the following evaluation criteria. (Evaluation Criteria) ○: The outer surface is formed by a series of folds, creating a foamy body with a cavity on the inside. ×: The outer surface was smooth and soft-serve ice cream-like, while the inner surface formed a foamy body without any cavities. -: No foam was formed.

[0089] <Presence or absence of splashing> The dispensed product, heated to 25°C, was dispensed upwards for 1 second to form a foam. The presence or absence of splashing was evaluated according to the following evaluation criteria. (Evaluation Criteria) ○: The foam was formed without scattering. ×: The foam scattered.

[0090] <Foam dripping> The dispensed product, heated to 25°C, was dispensed upwards for 1 second to form a foam. The state of the foam after 1 minute was then evaluated according to the following criteria. (Evaluation Criteria) ○: The foam remained on the nozzle and did not drip. ×: The foam was not retained on the nozzle and dripped down. -: No foam was formed.

[0091] <Foam retention> The dispensed product, heated to 25°C, was dispensed upwards for 1 second to form a foam. The state of the foam after 30 minutes was then evaluated according to the following criteria. (Evaluation Criteria) ○: The foam was dispensed in a three-dimensional manner, with a cavity formed inside, and this state was maintained for more than 30 minutes. △: The foam was extruded in a three-dimensional manner, with a cavity formed inside, and this state was maintained for 10-29 minutes. ×: No foam was formed.

[0092] <Foam hardness> A product heated to 25°C was dispensed into a spout fitted with a nozzle having a 3mm discharge hole. The product was dispensed from the nozzle into a bottomed cylindrical cup (32mm inner diameter, 27mm depth) to fill the cup with foam, and the surface of the foam was flattened by leveling the opening of the cup with a plate. The hardness (mN) of the foam was measured by applying a load and compressing it with a 30mm diameter disc-shaped plunger. EZ-test (manufactured by Shimadzu Corporation) was used to measure the hardness.

[0093] As shown in Table 2, the extruded products of Examples 1, 2, and 5 were able to extrude a three-dimensional, sufficiently firm foam with internal cavities and excellent retention without splashing. The extruded product of Example 3, with a stock solution / liquefied gas ratio of 54.3 / 45.7 (volume ratio), was able to extrude a three-dimensional, sufficiently firm foam with internal cavities without splashing, and the foam was retained for 10 to 29 minutes. The extruded products of Example 4, in which the liquefied gas of Example 1 was changed to LPG, and the extruded product of Example 6, in which the liquefied gas of Example 5 was changed to LPG, were able to extrude a three-dimensional, sufficiently firm foam with internal cavities without splashing. The extruded product of Comparative Example 1, with a stock solution / liquefied gas ratio of 44.2 / 55.8 (volume ratio), splashing occurred and no foam was formed. In Comparative Example 2, where the undiluted solution / liquefied gas ratio was 82.6 / 17.4 (volume ratio), the dispensed product did not splatter, but as shown in Figure 5, the outer surface was smooth and soft-serve ice cream-like, and a foamy body without internal cavities was formed, which could not be retained on the nozzle and dripped down. It was thought that the foamy body in the example, with its large surface area, would allow the active ingredient to diffuse easily when it was incorporated. [Explanation of Symbols]

[0094] 1 Discharge product 2 Discharge container 3 Discharge member 31 Shoulder cover 32 Hinge section 33 Operation section 33a Mounting part 33b Operation surface 33c Nozzle base 34 Discharge nozzles 34a Internal passage 34b opening 34c side 34d side 34e Bottom side 4. Container body 4a bottom 4b Torso 4c Shoulder 4d aperture 4e Bead section 5 valves 6 Stems 6a Stem hole 7 Housing 7a Introduction hole 8 Elastic bodies 9 Stem Rubber 10 Mounting Cups 11 tubes 11a Introduction hole

Claims

1. The device comprises a dispensing container filled with an effervescent aerosol composition, and a dispensing member attached to the dispensing container for dispensing the effervescent aerosol composition, The aforementioned effervescent aerosol composition consists of a stock solution and a liquefied gas. The aforementioned stock solution contains a surfactant and water. The content of the liquefied gas is 20 to 55% by volume in the effervescent aerosol composition. The hardness of the foam produced by the ejected foaming aerosol composition is 100 to 550 mN (at 25°C). The aforementioned discharge member is An internal passage extending in the axial direction, An opening is formed which communicates with the internal passage and opens on the side surface of the discharge member, The opening has a pair of sides that constitute the opening and control the discharge direction of the foaming aerosol composition when the foaming aerosol composition is discharged. The side surface of the discharged product has a twisted shape along the axis of the discharge member.

2. The discharge product according to claim 1, wherein the liquefied gas comprises a hydrofluoroolefin.

3. The dispensed product according to claim 1 or 2, wherein the surfactant includes an anionic surfactant.

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