Fixed quantity injection type aerosol product and suppression method of liquid dripping

Abstract

To provide a fixed quantity injection type aerosol product for toilet which has lowered injection sound so that it is hard to be noticed by others when using it in a private booth of a toilet, and a method for using the fixed quantity injection type aerosol product for toilet.SOLUTION: A fixed quantity injection type aerosol product for toilet comprises: an aerosol container filled with an aerosol composition containing an undiluted liquid and a jetting agent; and a fixed quantity injection aerosol valve attached to the aerosol container. An injection quantity per one injection is 0.2-0.4 mL, and equivalent noise level for 10 sec with A characteristic in a normal noise meter is 62 dB or lower.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a metered-dose aerosol product for toilets and a method for using the metered-dose aerosol product for toilets, and more particularly to a metered-dose aerosol product for toilets that produces a small spray sound and is unlikely to be noticed by others when used in a toilet stall, and a method for using the metered-dose aerosol product for toilets. [Background technology]

[0002] Conventionally, aerosol products have been developed for use in toilets and the like to deodorize the space. There is a demand for such aerosol products to reduce the noise they make when used so that others are less likely to notice that they have been used. Patent Document 1 discloses an air freshener that can be attached to a door and reduces the noise level by storing the aerosol in a folder inside the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-195211 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the air freshener described in Patent Document 1 is characterized by reducing the operating noise of the entire device when spraying, and is not a technology that reduces the spray noise itself. Therefore, this air freshener is likely to make others aware of its use due to the spray noise it emits.

[0005] The present invention has been made in consideration of such conventional problems, and aims to provide a metered-volume aerosol product for toilets that produces a low spray noise and, when used in a toilet cubicle, is unlikely to be noticed by others, and a method for using the metered-volume aerosol product for toilets. [Means for solving the problem]

[0006] As a result of extensive research, the inventors focused on the time average value (equivalent sound pressure level) of noise that fluctuates over a predetermined period of time (e.g., 10 seconds) after spraying, and discovered that when such equivalent sound pressure level is below a certain level, the user's use is unlikely to be noticed by others, even when the user uses the product in a toilet stall, for example, and thus completed the present invention. That is, the following configurations are mainly included in the toilet aerosol product and method of using the toilet aerosol product of the present invention that solve the above problems.

[0007] (1) A fixed-volume aerosol product for toilets, comprising an aerosol container filled with an aerosol composition containing a concentrate and a propellant, and an aerosol valve for fixed-volume spray attached to the aerosol container, the amount sprayed per spray being 0.2-0.4 mL, and the equivalent sound level of the spray sound for 10 seconds is 62 dB or less when measured with an A-weighted ordinary sound level meter.

[0008] (2) A metered-volume aerosol product for toilets as described in (1), in which the maximum noise level of the spray sound is 78 dB or less when measured with an A-weighted normal sound level meter.

[0009] (3) The metered dose aerosol product for toilets according to (1) or (2), wherein the blending ratio (volume ratio) of the concentrate to the propellant is 5 / 95 to 95 / 5.

[0010] (4) A metered-volume aerosol product for toilets according to any one of (1) to (3), further comprising an injection member attached to the aerosol container via the aerosol valve for metered-volume injection and having an orifice for spraying the aerosol composition, wherein when the blending ratio (volume ratio) of the concentrate to the propellant is A and the orifice diameter is B (mm), A / B is less than 8.0.

[0011] (5) A method for using a fixed-volume aerosol product for toilets, comprising using the fixed-volume aerosol product described in any one of (1) to (4) to generate a sound so that the equivalent sound level of the sound for 10 seconds when measured with an A-weighted ordinary sound level meter is 62 dB or less. Effect of the Invention

[0012] According to the present invention, it is possible to provide a metered-dose aerosol product for toilets that has a low spray noise and is unlikely to be noticed by others when used in a toilet stall or the like, and a method for using the metered-dose aerosol product for toilets. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Fixed-volume aerosol product for toilets> A metered-dose aerosol product for toilets (hereinafter, simply referred to as an aerosol product) according to one embodiment of the present invention comprises an aerosol container filled with an aerosol composition containing a concentrate and a propellant, an aerosol valve for metered-dose spraying (hereinafter, simply referred to as an aerosol valve) attached to the aerosol container, and a spray member attached to the aerosol container via the aerosol valve. The aerosol product has a spray volume of 0.2 to 0.4 mL per spray, and the equivalent sound level of the spray sound for 10 seconds is 62 dB or less when measured with an A-weighted normal sound level meter. Each of these will be described below. Note that the following description is merely an example, and the design of the aerosol container, the aerosol valve, and the spray member may be modified as appropriate.

[0014] (aerosol container) The aerosol container is a pressure-resistant container for pressurizing and filling the aerosol composition. The aerosol container is a roughly cylindrical container having a space formed therein in which the aerosol composition is filled. An opening is provided at the top of the aerosol container. The opening is sealed by an aerosol valve described later.

[0015] The material of the aerosol container is not particularly limited. For example, the aerosol container may be made of various pressure-resistant metals, resins, glass, etc.

[0016] (Aerosol Composition) The aerosol composition is the content of an aerosol product and includes a concentrate and a propellant.

[0017] Undiluted solution The concentrate is a component that can constitute an aerosol composition together with a propellant. The concentrate is filled into an aerosol container when the aerosol composition is prepared. The concentrate may contain an active ingredient. The active ingredient may be, for example, a deodorizing ingredient, a fragrance ingredient, a bactericidal ingredient (anti-fungal ingredient), etc.

[0018] The type of deodorant component is not particularly limited. Examples of the deodorant component include plant extracts such as camellia, rose, chrysanthemum, pine, cedar, and plantain; tea extract, catechin, plant polyphenol, plant essential oils such as linalool, menthol, and borneol; lauryl methacrylate, methylated cyclodextrin, geranyl crotonate, acetophenone myristate, and paramethylacetophenone benzaldehyde.

[0019] The type of the aromatic component is not particularly limited. Examples of the aromatic component include natural fragrances such as musk, bergamot oil, cinnamon oil, citronella oil, lemon oil, lemongrass oil, peppermint oil, spearmint oil, orange oil, eucalyptus oil, lavender oil, rush, and cypress; and artificial fragrances such as pinene, limonene, linalool, menthol, borneol, eugenol, citral, citronellal, geraniol, undecalactone, and phenethyl alcohol.

[0020] The type of the bactericidal component is not particularly limited, and examples of the bactericidal component include isopropylmethylphenol, triclosan, thymol, alkyldiaminoethylglycine hydrochloride, and silver ions.

[0021] When an active ingredient is contained, the content of the active ingredient may be a content that exhibits the effect of the active ingredient (for example, a deodorizing effect in the case of a deodorizing ingredient), and the upper limit of the content of the active ingredient is not particularly limited. The content of the active ingredient is, for example, preferably 0.01 mass / volume % (w / v%) or more in the aerosol composition, and more preferably 0.1 mass / volume % (w / v%) or more. The content of the active ingredient is, for example, preferably 10 mass / volume % (w / v%) or less in the aerosol composition, and more preferably 5.0 mass / volume % (w / v%) or less. With the above blending amount, a sufficient deodorizing effect and fragrance can be obtained.

[0022] The stock solution may contain a solvent. The solvent is preferably contained in order to uniformly blend an active ingredient such as a deodorant ingredient. For example, the solvent may be a lower alcohol such as ethanol or isopropanol, a polyhydric alcohol such as glycerin or ethylene glycol, a linear, branched or cyclic paraffin, a petroleum such as kerosene, a glycol ether such as propylene glycol monomethyl ether or dipropylene glycol dimethyl ether, water, an ester such as isopropyl myristate or hexyl laurate, or the like.

[0023] The content of the solvent is preferably 0.5 parts by mass or more, more preferably 1 part by mass or more, per 1 part by mass of the active ingredient. The content of the solvent is preferably 1000 parts by mass or less, more preferably 500 parts by mass or less, per 1 part by mass of the active ingredient. If it is within the above range, the concentrate is easy to mix the active ingredient uniformly.

[0024] In addition to the above-mentioned active ingredients, the concentrate may appropriately contain optional ingredients such as nonionic, anionic or cationic surfactants, antioxidants such as butylhydroxytoluene, stabilizers such as citric acid and ascorbic acid, inorganic powders such as talc and silicic acid, and pigments.

[0025] Propellant The propellant is a medium for spraying the concentrate, and is pressurized and filled into an aerosol container together with the concentrate. The propellant is not particularly limited. Examples of the propellant include hydrofluoroolefin, dimethyl ether (DME), and liquefied petroleum gas (LPG). The propellants may be used in combination of two or more.

[0026] The hydrofluoroolefin is exemplified by hydrofluoro-1-propene.Specifically, the hydrofluoropropene is exemplified by 1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene, 2,3,3-trifluoropropene, 3,3,3-trifluoropropene, 1-chloro-3,3,3-trifluoropropene, etc.The 1-chloro-3,3,3-trifluoropropene is exemplified by (E)-1-chloro-3,3,3-trifluoropropene, etc.

[0027] In addition to the propellant, the aerosol composition of the present embodiment may contain a compressed gas such as carbon dioxide gas, nitrogen gas, compressed air, or oxygen gas in order to adjust the pressure of the aerosol composition.

[0028] The mixing ratio (volume ratio) of the concentrate and the propellant of the aerosol composition is preferably 5 / 95 to 95 / 5, more preferably 10 / 90 to 90 / 10, and even more preferably 20 / 80 to 80 / 20. By adjusting the volume ratio in this way, the aerosol product can be easily adjusted so that the equivalent sound level of the ejection sound during ejection is 62 dB or less for 10 seconds. As a result, when the aerosol product is used in a toilet cubicle or the like, it is difficult for others to notice that it has been used.

[0029] (Aerosol valve) The aerosol valve is a mechanism for taking out the aerosol composition filled in the aerosol container, and closes the opening of the aerosol container. The aerosol valve of this embodiment is also formed with a metered chamber for temporarily storing the aerosol composition taken out from the aerosol container. The volume of the metered chamber corresponds to the volume of the aerosol composition sprayed in one spray. The volume of the metered chamber of this embodiment is 0.2 to 0.4 mL.

[0030] The aerosol valve comprises an opening / closing member for switching between communication and cut-off between the inside and outside of the metering chamber of the aerosol valve by the user operating the ejection member, a housing to which the opening / closing member is attached, and a mounting member for holding the housing at a predetermined position on the aerosol container. The opening / closing member also includes a stem that slides up and down in conjunction with the ejection member. The sliding of the stem switches between communication (ejection state) and cut-off (non-ejection state) of the aerosol composition. The aerosol valve is formed with a housing hole for taking in the aerosol composition from the aerosol container, and a stem hole for sending the taken-in aerosol composition to the ejection member. The housing hole is formed in the housing. The stem hole is formed in the stem. The path from the housing hole to the stem hole constitutes an internal passage through which the aerosol composition passes.

[0031] The stem is a part attached to the aerosol valve and has an internal passage for delivering the aerosol composition taken up in the aerosol valve to the spray button. The internal passage is appropriately opened and closed by the stem rubber.

[0032] In a state where the concentrate and the propellant are filled, the internal pressure of the aerosol valve at 20°C is preferably 0.15 Pa or more, more preferably 0.16 MPa or more. The internal pressure of the aerosol valve at 20°C is preferably 0.80 MPa or less, more preferably 0.70 MPa or less. By adjusting the internal pressure of the aerosol valve within such a range, the aerosol product can be easily adjusted so that the equivalent sound level of the ejection sound during ejection is 62 dB or less for 10 seconds. As a result, when the aerosol product is used in a toilet stall or the like, it is difficult for others to notice that it has been used. In addition, when the internal pressure of the aerosol valve is less than 0.15 MPa, the ejection sound of the aerosol product tends to be extremely small, and not only others but also the user himself is unlikely to realize that he has used it. In addition, the aerosol composition may drip from the nozzle after ejection. On the other hand, when the internal pressure of the aerosol valve exceeds 0.80 MPa, the aerosol composition may leak from the aerosol container. The internal pressure of the aerosol valve can be measured, for example, at 20°C by connecting a PGM-10KE small pressure sensor (manufactured by Kyowa Electric Industry Co., Ltd.) attached to a WGA-710C instrument conditioner (manufactured by Kyowa Electric Industry Co., Ltd.) to the aerosol valve.

[0033] (Injection member) The injection member is a member for injecting the concentrate taken from the aerosol container together with the propellant. The injection member is formed with an orifice for injecting the aerosol composition. The number, size, shape and cross-sectional area of ​​the orifices can be appropriately selected as necessary so that the equivalent noise level described below is 62 dB or less. Therefore, the aerosol product of this embodiment can employ an injection member formed with various orifices within the range in which the equivalent noise level is 62 dB or less.

[0034] The number, size and shape of the nozzle are not particularly limited. For example, the number of nozzles may be one or more than two. The size of the nozzle (diameter) is preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.3 mm or more. The diameter of the nozzle is preferably 3.0 mm or less, more preferably 2.0 mm or less, and even more preferably 1.0 mm or less. The shape (cross-sectional shape) of the nozzle may be a circle, an ellipse, a square, or any other irregular shape.

[0035] The total cross-sectional area (total opening area) of the nozzles is not particularly limited. The total cross-sectional area is appropriately adjusted as necessary so that the equivalent noise level described below is 62 dB or less. For example, the total cross-sectional area is 0.0075 mm 2 It is preferable that the thickness is 0.03 mm or more. 2 More preferably, the total cross-sectional area is 7.10 mm 2 Preferably, it is 3.20 mm or less. 2 It is more preferable that the cross-sectional area is equal to or less than 100 mm. In this embodiment, the "total cross-sectional area" refers to the total cross-sectional area (opening area) of the nozzle holes. In other words, when there is one nozzle hole, the total cross-sectional area is the cross-sectional area of ​​the nozzle hole itself, and when there are two or more nozzle holes, the total cross-sectional area is the sum of the cross-sectional areas of all the nozzle holes.

[0036] In the aerosol product of this embodiment, when the blending ratio (volume ratio) of the concentrate of the aerosol composition to the propellant is A and the nozzle diameter of the nozzle is B (mm), A / B is preferably less than 8.0, and more preferably 4.3 or less. When A / B is within the above range, the aerosol product is less likely to drip around the nozzle after use.

[0037] The length of the injection passage in the injection member is not particularly limited. The length of the injection passage is appropriately adjusted as necessary so that the equivalent noise level described below is 62 dB or less. As an example, the length of the injection passage is preferably 5.0 mm or more, and more preferably 8.0 mm or more. Also, the length of the injection passage is preferably 70 mm or less, and more preferably 65 mm or less. In this embodiment, the "length of the injection passage" refers to the length from the tip of the stem to the nozzle.

[0038] In the aerosol product of this embodiment, when the user operates the spray button, the stem mechanism and the aerosol valve are actuated, and the metering chamber of the valve communicates with the outside. As a result, a certain amount of the aerosol composition in the metering chamber of the valve is taken out of the aerosol container according to the pressure difference between the metering chamber of the valve and the outside, and is sprayed from the nozzle of the spray member.

[0039] The aerosol product of this embodiment is adjusted so that the amount of spray per time is 0.2 to 0.4 mL. If the amount of spray per time is less than 0.2 mL, the aerosol product tends to make an extremely quiet spray sound, and not only other people but also the user himself / herself find it difficult to realize that they have used the aerosol formulation. On the other hand, if the amount of spray per time is more than 0.4 mL, the aerosol product tends to make a loud spray sound, and other people tend to realize that they have used the aerosol formulation.

[0040] The aerosol product of this embodiment has an equivalent sound level (A-weighted sound pressure level) of 10 seconds of spray sound measured by a normal sound level meter of 62 dB or less. The equivalent sound level may be adjusted to 62 dB or less, preferably 60 dB or less, and more preferably 58 dB or less. The lower limit of the equivalent sound level is not particularly limited. From the viewpoint that the user can easily feel that the aerosol product has been used, the equivalent sound level is preferably 50 dB or more. When the equivalent sound level is 62 dB or less, the spray sound of the aerosol product is small, and when used in a toilet cubicle or the like, it is difficult for others to notice that the product has been used. The equivalent sound level is a numerical value for quantitatively grasping the noise level when it fluctuates over time, and is defined based on JIS Z8731-1999 as the noise level of a continuous steady sound that gives a mean square sound pressure equal to the mean square sound pressure of the fluctuating noise within a certain measurement time (10 seconds in this embodiment). It can be said that the smaller the value of the equivalent sound level, the less noise there is and the quieter the product is. The A-weighting characteristic refers to a frequency weighting characteristic that takes into account the human hearing used in measurements using a sound level meter. The equivalent sound level of this embodiment can be calculated, for example, by measuring the sound level of the aerosol product from a distance of 10 cm directly to the side of the nozzle using the A-weighting characteristic with a normal sound level meter NL-21 (manufactured by Rion Co., Ltd.). The equivalent sound level of this embodiment is the sound level when the equivalent sound level of the background is 35.6 dB. Since the aerosol product of this embodiment achieves the above equivalent sound level, it is difficult for others to notice that it has been used, even when it is used in a toilet cubicle or the like (the background in this case is about 35.6 dB). In order to explain how quiet the equivalent sound level of the aerosol product of this embodiment is, the equivalent sound levels in various environments are exemplified. For example, the sound level inside a quiet passenger car such as a taxi is about 60 dB, the sound level inside a subway car is about 80 dB, and the sound level of a cicada chirping 2 m away is about 70 dB. Therefore, the equivalent noise level of 62 dB or less achieved by the aerosol product of this embodiment can be said to be approximately the same as or lower than the sound of, for example, flushing a toilet, and is therefore a very quiet sound.In other words, if the aerosol product of this embodiment is used, for example, when flushing the toilet after using the toilet, the only sound that will be heard from outside is the sound of the toilet flushing, and it will be difficult to notice that the aerosol composition has been sprayed.

[0041] In this embodiment, the difference between the equivalent continuous sound level and the background noise level is preferably 26.4 dB or less, and more preferably 24.4 dB or less. By setting the difference between the equivalent continuous sound level and the background noise level to 22.4 dB or less, when the aerosol product is used in a toilet stall or the like, it is unlikely that others will notice that the product has been used.

[0042] In addition, the aerosol product of this embodiment preferably has a maximum noise level of 78 dB or less, more preferably 76 dB or less, when measured with an A-weighted normal sound level meter. The lower limit of the maximum noise level is not particularly limited. From the viewpoint of making it easy for the user to feel that he or she has used the aerosol product, the maximum noise level is preferably 60 dB or more. The maximum noise level represents the maximum value of the noise level within the actual measurement time. The maximum noise level of this embodiment can be calculated, for example, by measuring with an A-weighted normal sound level meter NL-21 (manufactured by Rion Co., Ltd.) from a distance of 10 cm directly to the side of the nozzle of the aerosol product. In addition, the maximum noise level of this embodiment is the noise level when the maximum background noise level is 39.0 dB.

[0043] In addition, the aerosol product of this embodiment is adjusted so that the amount of spray per time is 0.2 to 0.4 mL, and the equivalent sound level of the spray sound for 10 seconds using an A-weighted normal sound level meter is adjusted to 62 dB or less, so that when used in a toilet stall or the like, it is difficult for others to notice that it has been used. There are no particular limitations on the method of adjusting the amount of spray per time within the above range or the method of adjusting the equivalent sound level. In addition to the method of adjusting the amount of spray per time, the equivalent sound level can be appropriately adjusted by adjusting the internal pressure of the aerosol valve at 25°C, adjusting the blending ratio of the concentrate and the propellant, or adjusting the number, dimensions, shape, etc. of the spray members.

[0044] The method for producing the aerosol product of the present embodiment is not particularly limited. For example, the aerosol product can be produced by filling an aerosol container with a concentrate, closing the opening of the aerosol container with an aerosol valve, and pressurizing and filling a propellant through the nozzle or stem of a spray member.

[0045] As described above, the aerosol product of this embodiment has an amount sprayed per time and an equivalent noise level adjusted within a specified range, so that when used in a toilet stall, for example, it is unlikely for others to notice that it has been used.

[0046] <How to use a fixed-volume aerosol toilet product> A method for using a constant-volume aerosol product for toilets according to one embodiment of the present invention is a method for generating a constant-volume aerosol product using the above-mentioned constant-volume aerosol product so that the equivalent sound level of the sound for 10 seconds measured with an A-weighted sound level meter is 62 dB or less. According to this method, when the aerosol product is used in a toilet cubicle or the like, it is difficult for others to notice that the product has been used. The equivalent sound level when the method for using the aerosol product according to this embodiment is carried out is the sound level when the equivalent sound level of the background is 35.6 dB. EXAMPLES

[0047] The present invention will be described in more detail below with reference to the following examples. The present invention is not limited to these examples. Unless otherwise specified, "%" means "% by mass" and "parts" means "parts by mass".

[0048] Details of the aerosol products used are shown below. The nozzle diameter (mm) and number of stem holes (St), the nozzle diameter (mm) of the undertap hole (UT), and the nozzle diameter (mm) of the vapor tap hole (VpT) are shown in Table 1. Aerosol product 1: Injection member (nozzle diameter φ0.3mm, opening area 0.07065mm 2 , 1 nozzle with a circular cross-sectional shape, injection passage length 13.0 mm), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 2: Injection member (nozzle diameter φ0.35mm, opening area 0.09616mm 2 , 1 nozzle with a circular cross-sectional shape, injection passage length 13.0 mm), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 3: Injection member (nozzle diameter φ0.5mm, opening area 0.1963mm 2 , 1 nozzle with a circular cross-sectional shape, injection passage length 11.5 mm), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 4: Injection member (nozzle diameter φ0.6mm, opening area 0.2826mm 2 , 1 nozzle with a circular cross-sectional shape, injection passage length 12.2 mm), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 5: Injection member (nozzle diameter φ0.6mm, opening area 0.2826mm 2 , 1 nozzle with a circular cross section, a groove for diffusing the spray on the back of the nozzle, a gap between the nozzle and the nozzle, allowing for both straight and diffused sprays, spray passage length 10.8mm, aerosol valve (volume of metering chamber 0.2mL) Aerosol product 6: Injection member (nozzle diameter φ0.9mm, opening area 0.6359mm 2 , 1 nozzle with a circular cross-sectional shape, injection passage length 11.5 mm), aerosol valve (volume of metering chamber 0.2 mL) Aerosol product 7: Injection member (nozzle diameter φ0.3mm, opening area 0.07065mm 2 , 1 nozzle with a circular cross-sectional shape, injection passage length 13.0 mm), aerosol valve (volume of metering chamber 0.4 mL) Aerosol product 8: Spray member (two semicircular nozzles with a nozzle diameter of φ0.4 mm and two sets of rectangular nozzles with a diameter of φ0.4 mm and a rectangular nozzle with a diameter of 0.4 × 0.2 mm adjacent to the semicircular nozzles, with an opening area of ​​0.4112 mm 2 , injection passage length 50.0 mm), aerosol valve (volume of metering chamber 0.4 mL)

[0049] <Relationship between noise level and audibility of jet sound> Example 1 A 99.5% ethanol solution was used as the stock solution, and 25 mL of this stock solution was filled into an aerosol container with a capacity of 71 mL. After attaching an aerosol valve, the container was pressurized and filled with propellant (liquefied petroleum gas, saturated vapor pressure: 0.49 MPa (25°C)) so that the mixture ratio (volume ratio) of the stock solution and the propellant was 50 / 50, and an injection member was attached to produce an aerosol product (aerosol product 2 was used as the aerosol valve and injection member). The internal pressure of the aerosol valve (20°C) was 0.388 MPa. The internal pressure of the valve was measured at 20°C by connecting a PGM-10KE small pressure sensor (manufactured by Kyowa Electric Industry Co., Ltd.) attached to a WGA-710C instrument conditioner (manufactured by Kyowa Electric Industry Co., Ltd.) to the aerosol valve.

[0050] (Example 66) Aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that the concentrate formulation, type and gas pressure of the propellant, internal valve pressure, and type of aerosol product used were changed as shown in Table 2 below.

[0051] Comparative Example 1 A commercially available toilet deodorizing spray (commercial product A) was used as Comparative Example 1. In addition, this commercial product A had a blend ratio (volume ratio) of the concentrate (12.5% ​​active ingredient and 87.5% 99.5% ethanol) and the propellant (LPG at 0.49 MPa (25°C)) of 30 / 70, the internal pressure of the aerosol valve was 0.433 MPa (20°C), and the amount sprayed per time was 0.2 mL.

[0052] Comparative Example 2 A commercially available toilet deodorizing spray (commercial product B) was used as Comparative Example 2. This commercial product B had a blend ratio (volume ratio) of the concentrate (5.7% active ingredient and 94.3% 99.5% ethanol) and the propellant (LPG at 0.39 MPa (25°C)) of 7 / 93 (volume ratio), the internal pressure of the aerosol valve was 0.378 MPa (20°C), and it was a continuous spray type.

[0053] Comparative Example 3 A commercially available toilet deodorizing spray (commercial product C) was used as Comparative Example 3. This commercial product C had a blend ratio (volume ratio) of the concentrate (15% active ingredient and 99.5% ethanol 85%) and the propellant (composition unknown) of 15 / 85 (volume ratio), the internal pressure of the aerosol valve was 0.354 MPa (20°C), and it was a continuous spray type.

[0054] Comparative Example 4 A commercially available toilet deodorizing spray (commercial product D) was used as Comparative Example 4. This commercial product D had a blend ratio (volume ratio) of the concentrate (15% active ingredient and 99.5% ethanol 85%) and the propellant (composition unknown) of 20 / 80 (volume ratio), the internal pressure of the aerosol valve was 0.330 MPa (20°C), and it was a continuous spray type.

[0055] The products of Example 1, Example 66, and Comparative Examples 1 to 4 were each sprayed once (1 second spray for continuous spray products) in a private room of a men's restroom, and six testers evaluated the sound that could be heard outside the private room according to the following evaluation criteria, and the average was calculated. In addition, the equivalent sound level and maximum sound level of each product were measured with a standard sound level meter NL-21 (manufactured by Rion Co., Ltd.) at a distance of 10 cm directly to the side of the product nozzle, using A-weighting. The equivalent background sound level at the time of measurement was 35.6B. The maximum background sound level at the time of measurement was 39.0 dB. The results are shown in Table 1.

[0056] (Evaluation Criteria) 5: A loud injection sound could be heard. 4: The sound of the jets leaking out was audible and was annoying. 3: The sound of injection could be heard, but it was not bothersome. 2: The sound of the jet leaking out was audible, but not noticeable. 1: No sound of injection was heard.

[0057] [Table 1]

[0058] As shown in Table 1, it was found that the equivalent sound level of the products of Example 1 and Example 66 was about 62 dB, and when the equivalent sound level was greater than 62 dB, the evaluation result exceeded 3.5 (more than half of the evaluators evaluated the jet sound as annoying). From this, it was found that an equivalent sound level of 62 dB or less is the noise level at which the use of an aerosol product in a toilet stall is unlikely to be noticed by others. Similarly, it was found that a maximum sound level of 78 dB or less is more appropriate as a noise level at which the use of an aerosol product in a toilet stall is unlikely to be noticed by others. In addition, when a similar evaluation was performed on the toilet flushing sound, the evaluation result was 3.6. From this, it was found that the jet sound of the aerosol products of Example 1 and Example 66 is unlikely to be recognized by the outside when used during toilet flushing.

[0059] <Confirmation of noise levels, audibility and drip prevention effect of various aerosol products> (Examples 2 to 85, Comparative Examples 5 to 12) Aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that the concentrate formulation, type of propellant and gas pressure, valve internal pressure, and type of aerosol product used (any of aerosol products 1 to 8) were changed as shown in Table 2 below. The equivalent noise level, maximum noise level, and drip prevention effect during spraying of the obtained products were confirmed by the following evaluation method. All tests were performed at 25°C. The results are shown in Table 2. In Table 2, the numerical results shown in each of the examples and comparative examples are the maximum noise level in the upper row and the equivalent noise level in the lower row. The evaluation results of the drip prevention effect are shown in the column below the equivalent noise level.

[0060] (How to check noise levels) The equivalent sound level and maximum sound level were measured with an NL-21 standard sound level meter (manufactured by Rion Co., Ltd.) at a distance of 10 cm directly to the side of the nozzle of the aerosol product, with A-weighting. The equivalent sound level of the background during the measurement was 35.6 dB, and the maximum sound level of the background was 39.0 dB.

[0061] (How to check the drip prevention effect) The aerosol product was sprayed once, and the area around the nozzle was visually inspected to confirm the drip prevention effect according to the following evaluation criteria. (Evaluation Criteria) ○: No dripping occurred. △: A slight amount of dripping occurred, but was within the acceptable range. ×: Dripping occurred.

[0062] [Table 2]

[0063] As shown in Table 2, the aerosol products of Examples 1 to 85 had a spray amount of 0.2 to 0.4 mL per time and an equivalent sound pressure level of 62 dB or less. Therefore, even when various aerosol compositions and spray members were used, the aerosol products of Examples 1 to 85 were considered to be unlikely to be noticed by others outside the toilet stall when used in the toilet stall, as explained in relation to Table 1. These trends were also seen when referring to the maximum sound pressure level. On the other hand, the products of Comparative Examples 5 to 12 all had an equivalent sound pressure level of more than 62 dB, and therefore were considered to be likely or likely to be noticed by others outside the toilet stall when used in the toilet stall. Therefore, it was shown that in order to make it unlikely to be noticed by others outside the stall when used in the toilet stall, it is important not only that the equivalent sound pressure level is 62 dB or less, but also that the spray amount per time is adjusted to 0.2 to 0.4 mL.

Claims

1. The device comprises an aerosol container filled with an aerosol composition containing a concentrate and a propellant, and an aerosol valve for spraying a fixed amount attached to the aerosol container, The amount of each injection is 0.2 to 0.4 mL. A fixed-volume aerosol product for toilets with an equivalent sound level of 62 dB or less for 10 seconds when sprayed using an A-weighted standard sound level meter.

2. 2. The fixed-volume aerosol product for toilets according to claim 1, wherein the maximum sound level of the spray sound is 78 dB or less when measured with an A-weighted normal sound level meter.

3. 3. The toilet fixed-volume aerosol product according to claim 1, wherein a mixing ratio (volume ratio) of said concentrate to said propellant is 5 / 95 to 95 / 5.

4. The aerosol composition further includes a spray member that is attached to the aerosol container via the aerosol valve for spraying a fixed amount of the aerosol composition and has a spray nozzle formed therein, The toilet metered-volume aerosol product according to any one of claims 1 to 3, wherein A / B is less than 8.0, where A is the blending ratio (volume ratio) of the concentrate to the propellant, and B (mm) is the nozzle diameter of the nozzle.

5. A method for using a constant-volume aerosol product for toilets, comprising using the constant-volume aerosol product according to any one of claims 1 to 4 to generate a sound so that the equivalent sound level of the sound for 10 seconds measured with an A-weighted normal sound level meter is 62 dB or less.

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