JP2006320857A - Aerosol product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerosol product which is for spraying on a floor such as tatami or carpet, has a large spraying pattern, has high adhesion properties because the spraying force is weak, even spraying on the floor, the spattering is less, and further generates no backfire phenomenon and safe. <P>SOLUTION: The aerosol product 10 comprises an aerosol container 11 fixing an aerosol valve 14 to an opening of a pressure vessel 13, an aerosol composition A filled in the aerosol container 11, and a spraying member 12 fitted in the aerosol valve 14. The aerosol composition A comprises a concentrate solution containing a hydrocarbon solvent, and a combustible liquefied gas. The compound ratio of the concentrate solution to the combustible liquefied gas is 50/50 to 30/70 (volume ratio). The spraying member 12 has three straight-shaped spraying nozzles 35 with different spraying directions, and spraying holes of the spraying nozzle comprise large diameter parts and small diameter parts, and have a stage shape extending outward. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to aerosol products. More specifically, the present invention relates to an aerosol product that is widely sprayed on floors such as tatami mats and carpets.

JP-A-11-212499 JP 2000-325834 A JP 2001-233390 A JP 2003-205984 A

  2. Description of the Related Art Conventionally, pest aerosol products that are sprayed on floor surfaces of tatami mats and carpets are known in order to eliminate pests such as mites in tatami mats and carpets. However, such an aerosol product has a narrow spray spread from the spray holes (spray pattern) and a strong momentum in the spray direction, so that the sprayed aerosol composition (hereinafter referred to as spray particles) is on the floor surface. May bounce off. Therefore, there exists a problem that the active ingredient in an aerosol composition does not adhere efficiently to the target part, but the effect of an active ingredient cannot fully be exhibited.

  On the other hand, in order to solve such problems, if the spray pattern is enlarged and the spray pressure of the aerosol product is lowered to weaken the spray momentum (the spray speed is slow), the adhesion of spray particles to the floor improves. To do. However, if the stock solution contains a flammable solvent such as a hydrocarbon solvent or lower alcohol, and further contains a flammable liquefied gas such as liquefied petroleum gas or dimethyl ether as a propellant, the sprayed particles may be exposed to a fire source such as fire or static electricity. It becomes easy to ignite, and when the sprayed particles ignite, there is a flashback phenomenon in which the flame flows back to the aerosol product side, which does not satisfy the safety standard as a daily product. This is a phenomenon that occurs when the spray speed of the spray particles becomes slower than the propagation speed of the flame, and is particularly likely to occur when the spray pattern is large and the spray particles are small.

Patent Document 1 discloses an aerosol device having an injection hole characterized in that a tip opening is larger than an introduction port. Further, as the nozzle hole of such an aerosol apparatus, a shape in which the inner diameter from the introduction port to the opening is gradually increased and a shape in which the diameter gradually increases are illustrated.
Since such a configuration is provided, the liquefied gas in the aerosol composition traveling from the inlet to the tip opening is vaporized stepwise before being jetted from the opening, and the pressure thereof is also reduced stepwise. And with the fall of the pressure, a spray particle is injected with a coarse particle | grain without being refined | miniaturized. Therefore, when injecting with respect to a floor surface, the rising of spray particles can be suppressed and the adhesion amount to a floor surface can be increased. However, in the aerosol device described in Patent Document 1, the spread of the spray particles is suppressed by the opening of the tip of the nozzle, and the flow of the spray particles has a direction. Sprayed and can suppress the flashback phenomenon. However, it is not sprayed over a wide range, and since spray particles are coarse, it is difficult to uniformly adhere to the floor surface.

  Patent Documents 2, 3, and 4 disclose aerosol products having a plurality of injection holes. When a plurality of injection holes are provided in this way, the injection pattern can be expanded by directing each injection hole in a different direction. However, since these aerosol products disperse the aerosol composition flowing from the stem hole of the aerosol valve into the injection member into the plurality of injection holes, the energy of the liquefied gas required for the injection is also distributed, and the momentum of the injection is suppressed. . In particular, when the direction of each injection hole is arranged at a wide angle in order to inject over a wide range, the momentum in the injection direction perpendicular to the axis of the aerosol product becomes weak. As a result, even if it is injected onto the floor surface, the rebound is reduced, but a flashback phenomenon is likely to occur, and it is difficult to say that it is safe for the user.

  The present invention is sprayed onto the floor surface of tatami mats and carpets, has a large spray pattern, small rebound even when sprayed on the floor surface, high adhesion of spray particles, and no flashback phenomenon It aims to provide a safe aerosol product with a range of jetting momentum.

  The aerosol product of the present invention comprises an aerosol container having an aerosol valve fixed to the opening of a pressure-resistant container, an aerosol composition filled in the aerosol container, and an injection member attached to the aerosol valve. Is an aerosol product comprising a stock solution containing a hydrocarbon-based solvent and a combustible liquefied gas, wherein the ratio composition of the stock solution and combustible liquefied gas is 50/50 to 30/70 (volume ratio), Between the valve and the pressure vessel, there is provided only an injection passage through which the liquid of the aerosol composition passes, and the injection member has three injection holes with different injection directions, a stem mounting portion connected to the aerosol valve, and an injection A passage in the injection member that communicates the hole and the stem mounting portion, and each injection hole communicates with the passage in the injection member in a straight line. It is characterized in that has a shape that extends to the outside consisting of a small diameter portion in stepped (claim 1).

As used herein, “only the injection passage through which the liquid of the aerosol composition passes is provided between the aerosol valve and the pressure vessel” means that a vapor tap (vapor) that communicates between the gas phase in the pressure vessel and the aerosol valve. (Phase introduction hole) is not provided, and only a passage for moving the liquid of the aerosol composition is provided.
Further, “in line with the passage in the injection member” means that the injection hole of the injection nozzle and the passage in the injection member are in linear communication, and the aerosol composition to be injected is injected. The one that passes straight through the hole. And what is provided with the mechanical breakup shape which swirls an aerosol composition just before what is called an injection hole, and passes an injection hole in the state of a vortex flow is said.

  In such an aerosol product, it is preferable that the injection holes of the injection member are provided in a row, and the injection angles of the injection holes on both sides with respect to the central injection hole are the same (Claim 2). And the thing whose injection angle is 10-45 degree | times is preferable (Claim 3).

  The diameter of the large diameter portion of the injection hole is preferably 0.3 to 0.7 mm, and the diameter of the small diameter portion is preferably 0.1 to 0.5 mm. Further, the aerosol product in which the pressure at 25 ° C. in the aerosol container is 0.25 to 0.6 MPa (Claim 5) and the injection amount per minute is 10 to 50 g (Claim). 6).

  The aerosol product of the present invention comprises an aerosol container having an aerosol valve fixed to the opening of a pressure-resistant container, an aerosol composition filled in the aerosol container, and an injection member attached to the aerosol valve. Consists of a stock solution containing a hydrocarbon-based solvent and a combustible liquefied gas, and the ratio composition of the stock solution and the combustible liquefied gas is 50/50 to 30/70 (volume ratio), and the jetting member is jetted Three injection holes having different directions, a stem mounting portion connected to the aerosol valve, and a passage in the injection member that connects the injection hole and the stem mounting portion are provided. By providing three injection holes with different injection directions, the injection pattern of the aerosol composition to be injected can be expanded. Moreover, since the momentum of injection can be reduced, even if the aerosol composition having the above-described configuration is injected onto the floor surface, the rebound can be minimized and the adhesion to the floor surface can be improved.

  However, since the momentum of the projectile becomes too small with the above configuration alone, a backfire phenomenon is likely to occur and there is a safety problem. Therefore, the aerosol product of the present invention further includes an aerosol valve in which only an injection passage for passing the liquid of the aerosol composition is formed between the aerosol valve and the pressure resistant container, that is, an aerosol valve in which no vapor tap hole is formed. I use it. Further, since the injection hole formed on the straight line of the passage in the injection member and having a shape that expands in a stepped manner consisting of a large diameter portion and a small diameter portion is used, the injection speed is excessively diffused. The spray particles that have become smaller are eliminated, and the spray particles are injected with a certain degree of momentum and directionality, thereby solving the problem of the flashback phenomenon.

In general, an aerosol container filled with an aerosol composition containing a combustible stock solution containing a hydrocarbon-based agent and a combustible liquefied gas in the above-described ratio includes a gas phase portion of the aerosol container, an aerosol valve housing, Vapor tapped holes are provided to communicate. This is in order to prevent the flame length from becoming too long in the flame length test by mixing the gas in the aerosol composition to be injected, reducing the injection amount of the combustible stock solution, and shortening the flight distance of the spray particles. is there. However, in the present invention, spray particles are provided with sufficient momentum by providing three injection holes and not forming vapor tap holes in the aerosol product filled with the aerosol composition.
That is, the present inventor has found a combination suitable for an aerosol product having a wide spray pattern, preventing a flashback phenomenon, and evenly spraying particles onto the floor surface so that spray particles do not rebound. It is.

  In the aerosol product of the present invention as described above, the injection holes of the injection member are provided in a line, and when the injection angles of the injection holes on both sides with respect to the central injection hole are the same, the injection pattern is expanded without a gap. And the spray concentration can be made uniform. Moreover, since it is located in a line, it is possible to adhere spray particles at a uniform concentration to a wide floor surface by changing the spray direction while spraying in a direction perpendicular to the straight lines. Furthermore, the aesthetic effect as a product is also high (Claim 2). In addition, the injection holes arranged in this manner and having an injection angle of 10 to 45 degrees do not narrow the injection pattern, have excellent adhesion, and do not spread excessively. However, it is preferable that the flashback phenomenon hardly occurs (claim 3). In addition, when the diameter of the large diameter portion of the injection hole is 0.3 to 0.7 mm and the diameter of the small diameter portion is 0.1 to 0.5 mm, the spray particles that extend excessively from the injection hole are eliminated and the reverse A fire phenomenon can be made difficult to occur (claim 4). When the pressure in the aerosol container at 25 ° C. is 0.25 to 0.6 MPa (Claim 5), and further when the injection amount per minute is 10 to 50 g (Claim 6), three injection holes It is possible to maintain the momentum of spraying in a range in which the backfire phenomenon is unlikely to occur in the sprayed particles injected from above, and it is easy to adhere to the floor surface. When the pressure is less than 0.25 MPa, or when the injection amount per minute is less than 10 g, the momentum of the injection becomes too small and the flashback phenomenon is likely to occur. Further, when the pressure is larger than 0.6 MPa, or when the injection amount per minute is larger than 50 g, the momentum of the injection becomes strong and the spray particles are likely to rebound.

  Next, the aerosol product of the present invention will be described with reference to the drawings. 1 is a side view showing an embodiment of the aerosol product of the present invention, FIG. 2 is an enlarged sectional view showing an aerosol valve and a push button of the aerosol product of FIG. 1, and FIG. 3a is a nozzle mounting member of the push button shown in FIG. FIG. 3b is an enlarged cross-sectional view showing the injection nozzle of the push button shown in FIG. 2, FIG. 4a is a cross-sectional view showing the spray state of the aerosol product shown in FIG. 1, and FIG. It is sectional drawing which is performing the flame length test using the aerosol product.

  An aerosol product 10 shown in FIG. 1 includes an aerosol container 11, an injection member 12 attached to the aerosol container, and an aerosol composition A filled in the aerosol container.

The aerosol container 11 includes a pressure-resistant container 13 and an aerosol valve 14 fixed to the opening.
The pressure vessel 13 is a three-piece can in which a metal part 13b and a bottom part 13c are fixed to a body part 13a formed of a metal plate such as tinplate or tin-nickel steel plate (TNS) in a cylindrical shape by double winding closure. A bead portion 13d is formed at the upper end opening of the eyepiece portion. As this pressure vessel, for example, a slag formed of a metal plate such as aluminum or stainless steel in a disk shape is formed into a bottomed cylindrical shape by impact processing, drawing / ironing processing, and further shouldering by necking processing, rolling processing, etc. You may use the monoblock can which shape | molded the part and the bead.

  As shown in FIG. 2, the aerosol valve 14 includes a mounting cap 15 fixed to the bead portion 13d of the pressure vessel 13 via a gasket 21, a cylindrical housing 16 held at the center of the mounting cap, and a housing. A stem 17 having a stem hole 22 that is accommodated in a vertically movable manner and communicates the atmosphere with the inside of the aerosol container 11, a spring 18 that constantly biases the stem upward, and a stem hole 22 when the stem 17 is positioned upward. And a dip tube 20 whose upper end is attached to the lower end 23 of the housing and whose lower end extends to the bottom of the aerosol container 11.

  In addition, the housing 16 is provided with a liquid introduction hole 24 that adjusts the flow rate of the liquid aerosol composition that is introduced from the lower end opening of the dip tube during injection and is supplied into the housing. The diameter of the liquid introduction hole 24 is preferably 0.3 to 2.0 mm, particularly preferably 0.4 to 1.0 mm. When the diameter of the liquid introduction hole 24 is less than 0.3 mm, the momentum of injection becomes too weak and a flashback phenomenon is likely to occur. On the other hand, when it exceeds 2.0 mm, the momentum of injection becomes too strong, and if it is injected onto the floor surface, it tends to rebound, resulting in poor adhesion of spray particles.

  The aerosol valve 14 injects only the liquid of the aerosol composition, and when the stem 17 is pushed down to open the stem hole 22, the liquid aerosol composition passes from the lower end opening of the dip tube 20 to the passage in the tube and the housing. The liquid is introduced into the housing 16 through the liquid introduction hole 24, further passes through the stem hole 22, and is ejected to the outside from the ejection hole of the ejection member 12. The injection passage inside the aerosol container 11, that is, the passage from the lower end opening of the dip tube 20 to the stem hole 22 is not provided with a gas phase communication hole such as a vapor tap hole communicating with the gas phase of the aerosol composition. Therefore, even if it is injected in the wide-angle direction from the three injection holes, the momentum in the injection direction can be maintained to such an extent that no backfire occurs.

Returning to FIG. 1, the injection member 12 is attached to the cover member 26 attached to the head (mounting cap 15) of the aerosol container and the stem 17 of the aerosol valve, and the top surface 28 is pushed down with a finger during use. And a push button 27.
The cover member 26 includes a mounting portion 29 for mounting on a curled portion (a portion where the container bead portion 13d is crimped) of the mounting cap, and a pair of side wall portions 31 that cover both side surfaces of the push button.

  The push button 27 shown in FIG. 2 includes three injection nozzles 35 (upper nozzle 35a, middle nozzle 35b, and lower nozzle 35c) arranged in a vertical line having injection holes 32, and a nozzle mounting member 36 for mounting these injection nozzles. And a push button body 38 having a stem mounting portion 37 for mounting the nozzle mounting member and mounting the push button 27 to the stem 17.

  An enlarged view of the spray nozzle 35 and nozzle mounting member 36 is shown in FIG. 3a. The injection nozzle 35 shown in FIG. 3B is formed into a bottomed cylindrical shape using a synthetic resin such as Duracon or nylon, or a metal such as aluminum or stainless steel. An injection hole 32 is provided at the center of the bottom 39, and the injection hole 32 includes a small diameter part 41 and a large diameter part 42 having different diameters. The small diameter portion 41 is formed inside the injection nozzle 35, and the large diameter portion 42 is formed outside the injection nozzle 35. In a state in which the injection nozzle 35 is mounted on the nozzle mounting member 36 (see FIG. 3A), the injection hole 32 has a shape that expands outward in a step shape by the small diameter portion 41 and the large diameter portion 42.

  Since the injection nozzle 35 is thus configured, the pressure of the aerosol composition passing through the injection nozzle 35 decreases as it goes outward. The spray particles diffused by the vaporization of the liquefied gas at the outlet of the small diameter portion 41 (the boundary between the small diameter portion 41 and the large diameter portion 42) are suppressed by the side surface 42a of the large diameter portion 42. Therefore, it is possible to eliminate the spray particles that are excessively diffused and have a low injection speed, to impart directionality to the spray particles, and to suppress the flashback phenomenon. The diameter of the small-diameter portion 41 is 0.1 to 0.5 mm, more preferably 0.2 to 0.4 mm. Moreover, the diameter of the large diameter part 42 is 0.3-0.8 mm, More preferably, it is 0.4-0.7 mm. In particular, when the ratio of the diameters of the small diameter part 41 and the large diameter part 42 (small diameter part / large diameter part) is 0.3 to 0.9, and more preferably 0.4 to 0.8, the flashback phenomenon is caused. It can be further suppressed.

  The nozzle mounting member 36 supports the injection nozzle 35 so that the injection direction of each injection nozzle 35 is at a predetermined angle, and has a bottomed cylindrical nozzle insertion portion 43 into which the cylindrical portion 40 of the injection nozzle 35 is inserted. And a bottomed cylindrical mounting portion 44 for mounting on the push button main body 38, and the mounting portion 44 and each nozzle insertion portion 43 are provided on the common bottom portion 45 of the nozzle insertion portion 43 and the mounting portion 44. Bottom communication holes 46 are formed so as to communicate with each other.

  In a state where the injection nozzle 35 is attached to the nozzle attachment member 36, a space 47 is formed between the inside of the cylinder 40 of the injection nozzle 35 and the nozzle insertion portion 43. The injection hole 32 communicates linearly with the bottom communication hole 46 via the space 47. Therefore, the aerosol composition A flows into the space 47 from the push button main body 38 through the bottom communication hole 46 at the time of injection, passes linearly without swirling in the space 47, reaches the injection hole 32, and is straight. Is injected outside. Note that “passing in a straight line” excludes a state in which the aerosol composition is forcibly swirled like the aerosol composition that has passed through the mechanical breakup mechanism. The mechanical breakup mechanism causes the aerosol composition to spirally and stay immediately before the injection hole, thereby reducing the directionality of the injection. In other words, “passing on a straight line” means that having a shape that is injected from the injection hole without weakening the directionality or momentum of the aerosol composition introduced into the injection nozzle.

  As shown in FIG. 2, the push button main body 38 has a fitting portion 51 for fitting the mounting portion 44 (cylindrical portion) of the nozzle mounting member 36 and a stem mounting portion 37 for mounting the push button on the stem. In addition, an intra-button passage 52 that communicates between the nozzle mounting member 36 and the stem mounting portion 37 in a state where the nozzle mounting member 36 is fitted is formed.

  The push button 27 configured in this manner has three injection holes 32 arranged in a row in the vertical direction, and the injection nozzle 35b is a nozzle so that the central injection hole 32b faces a direction perpendicular to the axis of the aerosol product. The mounting member 36 is mounted. Further, the injection nozzles 35a and 35c are mounted on the nozzle mounting member 36 so that the upper and lower injection holes 32a and 32c are vertically oriented with respect to the central injection hole 32b. The upper and lower injection holes 32a and 32c are provided so as to have the same injection angle although they are upside down with the central injection hole 32b as a reference (0 degree). The angles of the upper and lower injection holes 32a and 32c are 10 to 45 degrees with respect to the central injection hole 32b, and more preferably 15 to 30 degrees. When the injection angle is less than 10 degrees, the injection pattern becomes small, and the momentum of injection becomes strong. On the other hand, when the injection angle exceeds 45 degrees, the injection pattern becomes large, but the momentum of the injection becomes too weak and the flashback phenomenon tends to occur.

  The interval between the injection holes 32 is 3 to 20 mm, more preferably 5 to 15 mm. When the distance between the injection holes 32 is less than 3 mm, the spray particles tend to overlap in the vicinity of the injection holes, and a difference in concentration within the injection pattern is likely to occur. On the other hand, when the distance between the injection holes exceeds 20 mm, depending on the injection angle, a portion (gap) where no spray particles exist between the injection patterns injected from the respective injection holes tends to occur, and the spray particles on the floor surface to be injected. There is a part that does not adhere.

  In this embodiment, the injection angle of the upper injection hole 32a with respect to the central injection hole 32b is the same as the injection angle of the lower injection hole 32c with respect to the central injection hole 32b. You may make it both injection angles differ in the range which does not bounce and a backfire phenomenon does not arise. In addition, the distance between the central injection hole 32b and the upper injection hole 32a is the same as the distance between the central injection hole 32b and the lower injection hole 32c, but there is no rebound on the floor surface and the flashback phenomenon. You may make it make the distance between both injection holes differ in the range which does not arise.

The aerosol composition A filled in the aerosol container 11 is composed of a stock solution containing a hydrocarbon solvent and a combustible liquefied gas.
The undiluted solution contains a hydrocarbon solvent as an active ingredient solvent, and is atomized by vaporization of the liquefied gas at the time of jetting, adheres to the floor surface such as tatami mats and carpets, or directly to pests. Adheres and exhibits efficacy.

  Examples of the hydrocarbon solvent include hydrocarbons that are liquid at room temperature, such as kerosene, squalane, squalene, normal paraffin, and isoparaffin.

  Examples of the active ingredient include insecticidal and acaricidal ingredients such as phthalthrin, allethrin, permethrin, framethrin, praretrin, resmethrin, d-phenothrin, tefluthrin, transfluthrin, imiprothrin, amidoflumet, sinepirin, piperonyl butoxysite, octane. Examples include potency enhancers such as chlorodipropyl ether, deodorizing ingredients such as lauryl methacrylate, geranyl crotolate, acetophenone myristate, benzyl acetate, benzyl propionate, and methyl phenylacetate, and fragrances.

  The active ingredient is preferably blended so that the concentration in the stock solution is 0.001 to 10% by weight, more preferably 0.005 to 5% by weight. When the concentration of the active ingredient is less than 0.001% by weight, the concentration of the active ingredient contained in the injection is low, and it is difficult to obtain the effect with a normal use amount. On the other hand, if it exceeds 10% by weight, the concentration of the active ingredient contained in the propellant becomes high, and the user may be adversely affected even at a normal use amount.

The stock solution can be prepared by blending an active ingredient with a hydrocarbon solvent, but other oil-based solvents, surfactants, aqueous solvents, and the like can be blended as appropriate according to the application and purpose.
Examples of the oil solvent include ester oils such as isopropyl myristate, cetyl isooctanoate, octyldodecyl myristate, isopropyl palmitate, diethyl phthalate, diethoxyethyl phthalate, diethoxyethyl succinate, methylpolysiloxane, deca Silicone oils such as methyltetrasiloxane, octamethylcyclotetrasiloxane, methylphenylpolysiloxane, camellia oil, corn oil, olive oil, castor oil, safflower oil, jojoba oil, oils such as coconut oil, higher fatty acids such as oleic acid, Examples include higher alcohols such as oleyl alcohol and isostearyl alcohol.

  Examples of the surfactant include glycerin fatty acid esters, polyglycerin fatty acid esters such as di, tri, tetra, hexa, and deca, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol fatty acid esters, and polyoxyethylene alkyl ethers. , Polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene sorbite fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene castor oil / hardened castor oil, polyoxyethylene lanolin alcohol and the like.

  Examples of the aqueous solvent include water such as purified water and ion exchange water, lower alcohols such as ethanol and isopropyl alcohol, polyhydric alcohols such as propylene glycol, 1,3-butylene glycol, diethylene glycol, and glycerin.

The combustible liquefied gas is a liquid inside the aerosol container 11, and when released into the atmosphere, it vaporizes and expands its volume, and acts as a propellant for refining the stock solution and injecting it in the form of a mist.
Examples of the combustible liquefied gas include hydrocarbons having 3 to 5 carbon atoms such as propane, normal butane, isobutane, normal pentane, and isopentane, dimethyl ether, and mixtures thereof. In particular, a liquefied gas having a saturated vapor pressure of 0.2 to 0.6 MPa, more preferably 0.25 to 0.5 MPa at 25 ° C. is preferable in consideration of adhesion of spray particles, flashback phenomenon, and injection pattern. .

  The mixing ratio of the stock solution and the combustible liquefied gas is preferably stock solution / combustible liquefied gas = 50/50 to 30/70 (volume ratio), and more preferably 45/55 to 35/65. preferable. When the blending ratio is greater than 50/50, the spray particles become coarse and difficult to adhere uniformly to the floor surface. On the other hand, if the blending ratio is less than 30/70, the spray particles become too fine and easily bounce off the floor.

  As a manufacturing method of the aerosol product 10 in FIG. 1, for example, an active ingredient is blended with a hydrocarbon solvent to prepare a stock solution, and the stock solution is filled in the pressure resistant container 13. Next, an aerosol valve 14 is placed in the opening of the pressure vessel 13, and an undercup is filled with combustible liquefied gas from between the bead portion 13 d and the curled portion of the mounting cup 15, and the aerosol valve 14 is fixed to the pressure vessel 13. To do. In this way, the stock solution is mixed with the combustible liquefied gas inside the aerosol container. Then, the aerosol product 10 is manufactured by mounting the injection member 12 on the aerosol valve 14.

  The pressure at 25 ° C. of the aerosol product 10 is 0.25 to 0.6 MPa, more preferably 0.3 to 0.55 MPa. When this pressure is less than 0.25 MPa, the momentum of injection becomes too weak to inject from the three injection holes 32, and the flashback phenomenon is likely to occur. If it exceeds 0.6 MPa, even if it is injected from the three injection holes 32, the momentum of the injection is too strong and rebounding on the floor surface tends to occur.

  When the aerosol product 10 is used, the body portion 13a of the pressure vessel 13 is gripped, and the top surface 28 of the push button is pushed down with the finger Y with the injection port 32 facing the floor (see FIG. 4a). At this time, the stem 17 is pushed down and the stem hole 22 is opened. As a result, the liquid of the aerosol composition A inside the aerosol container 11 that is at a high pressure by the combustible liquefied gas is introduced into the dip tube from the lower end opening of the dip tube 20, and the liquid introduction hole 24 passes through the passage in the tube. From the inside of the housing 16. Further, the aerosol composition A passes through the stem hole 22 and the button internal passage 52 from the inside of the housing 16, passes through the bottom communication hole 46 and the space 47, passes through the injection hole 32 linearly, and is injected to the outside. In this way, since the three injection holes 32 are injected at a wide angle at a predetermined injection angle, the momentum of the spray particles can be suppressed to such an extent that no rebound occurs when the injection is made on the floor surface.

  However, a backfire phenomenon tends to occur in spray particles in which the number of injection holes is reduced to suppress the momentum of the injection. Therefore, the aerosol composition is introduced from the pressure vessel into the injection nozzle 35 with the maximum force by using the aerosol valve 14 in which no vapor tap hole is formed and forming the injection hole on the straight line of the passage in the button. To do. Furthermore, when the introduced aerosol composition passes through the injection nozzle 35 including the small-diameter portion 41 and the large-diameter portion 42, it is possible to eliminate spray particles that are excessively diffused and have a low injection speed. In other words, it is an aerosol product that has three injection holes and can be sprayed over a wide range with an aerosol composition containing a large amount of flammable liquefied gas. The injection is performed at an injection speed that does not cause a flashback phenomenon while remaining effective in preventing rebound.

  Moreover, the injection amount per minute of the aerosol product 10 is 10 to 50 g, more preferably 15 to 45 g. When the injection amount is less than 10 g, the momentum in the injection direction tends to be insufficient, and a flashback phenomenon is likely to occur. If the amount of injection exceeds 50 g, the momentum in the injection direction becomes too strong even if the injection is made from the plurality of injection holes 32, and the rebound on the floor surface becomes strong.

  The aerosol product of the present invention is suitable for a floor insecticide aerosol product that kills pests such as ticks and fleas lurking on tatami mats and carpets because it does not rebound even when sprayed on the floor surface and has a large amount of adhesion. Can be used. In addition, even if the spray particles are ignited when the aerosol product is being injected, the flashback phenomenon does not occur, so the user can take measures such as stopping the injection calmly without being confused. In addition, when the aerosol product is no longer needed and discarded, the aerosol composition remaining in the aerosol container is continuously sprayed, and even if the spray particles ignite, the flashback phenomenon does not occur. Can cope with calm.

[Aerosol Product A]
As a stock solution, 120 ml of a hydrocarbon solvent (trade name: neothiozole) was filled in a three-piece tin pressure vessel 13, and an aerosol valve 14 was placed in the opening of the pressure vessel 13. Next, 180 ml of a mixture of liquefied petroleum gas and dimethyl ether (LPG (vapor pressure at 25 ° C. is 0.20 MPa) /DME=72.2/27.8 (weight ratio)) as a combustible liquefied gas is filled by undercup filling. The mounting cap 15 was crimped to fix the aerosol valve 14. Further, an aerosol product 10 was manufactured by mounting the injection member 12 shown in FIG.

  The push button 27 of the injection member 12 has three injection nozzles 12 arranged in a row in the vertical direction, and the central injection hole 32b faces the direction perpendicular to the axis of the aerosol product 10, and The injection holes 32a and 32c are inclined 20 degrees with respect to the central injection hole 32b. The product pressure of the aerosol product 10 at 25 ° C. was 0.30 MPa.

  Table 1 shows the conditions of the aerosol valve 14 and the push button 27 used in the test. In the column of injection holes in Table 1, “ST” refers to an injection nozzle having a shape that allows the aerosol composition to pass linearly, “MB” refers to an injection nozzle with a mechanical breakup mechanism, and “CP”. Refers to an injection nozzle with mechanical breakup mechanisms on both sides of the center post.

[Aerosol Product B]
An aerosol product B similar to the aerosol product A was produced except that liquefied petroleum gas having a vapor pressure at 25 ° C. of 0.34 MPa was used. The product pressure at 25 ° C. was 0.4 MPa. Table 2 shows the conditions of the aerosol valve 14 and the push button 27 used in the test.

[Aerosol Product C]
Except for using liquefied petroleum gas having a vapor pressure of 0.45 MPa at 25 ° C., Example 3 (stem hole φ0.3, liquid inlet hole φ0.5, aerosol valve without gas phase inlet hole, large diameter An aerosol product C (Example 6) similar to a part φ0.5, a small diameter part φ0.3, and a push button having a straight injection hole was manufactured. The product pressure at 25 ° C. was 0.45 MPa, and the injection amount per minute was 35.6 g.

[Aerosol Product D]
Except for using liquefied petroleum gas having a vapor pressure at 25 ° C. of 0.50 MPa, Example 3 (stem hole φ0.3, liquid inlet hole φ0.5, aerosol valve without gas phase inlet hole, large diameter An aerosol product D (Example 7) similar to a part φ0.5, a small diameter part φ0.3, and a push button having a straight injection hole was manufactured. The product pressure at 25 ° C. was 0.49 MPa, and the injection amount per minute was 36.4 g.

[Aerosol Product E]
An aerosol product C similar to the aerosol product A was produced except that an aerosol valve having a gas introduction hole was used. Table 3 shows the conditions of the aerosol valve and the injection hole used in the test.

[Aerosol Product F]
An aerosol product D similar to the aerosol product A was produced except that a push button having one injection nozzle and an injection hole opening in a direction perpendicular to the axis of the aerosol product was used. The conditions of the aerosol valve and the injection hole used in the test are as shown in Table 4.

[Test method]
The spray test uses an aerosol product held for 1 hour in a constant temperature water bath adjusted to 25 ° C., sprays with a height of 80 cm from the tatami mat and the axis of the aerosol product tilts 45 ° with respect to the tatami mat, and sprays on the tatami mat. The presence or absence of particle rebound was observed. The evaluation criteria are as follows.
○: There is almost no rebound, and there is no scattering near the surface.
Δ: There is little rebound, but there is scattering near the surface.
X: There are many rebounds, and the spray particles which bounced are scattered near the surface of the tatami mat.

  In the flame length test, an aerosol product maintained for 1 hour in a thermostatic water bath adjusted to 25 ° C. was sprayed from a lower injection hole from a position of a distance of 15 cm to a flame (length 5 cm) as shown in FIG. 4b. The presence or absence of the flashback phenomenon B in which the flame flows backward to the aerosol product side when the jetted product was jetted so as to pass through the upper third of the flame was evaluated.

Table 5 shows the results of the injection test and the flame length test.

As for the injection test, when an injection nozzle having three injection holes was used, there was some scattering near the surface, but the rebound of spray particles could be suppressed. In addition, in the flame length test, the backfire phenomenon could be suppressed by using a straight injection nozzle (“ST”) having a small diameter part and a large diameter part. However, even if the small diameter portion and the large diameter portion are provided, the flashback phenomenon cannot be sufficiently suppressed by the injection nozzles “MB” and “CP” with the mechanical breakup mechanism. Moreover, even if the injection nozzle which is not provided with the small diameter part and the large diameter part is provided with the straight shape, the flashback phenomenon cannot be suppressed.
In addition, when the valve | bulb provided with the vapor tap hole was used, even if it used the straight-shaped injection nozzle provided with the small diameter part and the large diameter part, the backfire phenomenon was not able to be suppressed. Furthermore, when an injection nozzle with one injection hole was used, the spray particles rebounded so much that the flashback phenomenon could not be suppressed.
From these test results, the injection nozzle that has three injection holes with a small diameter part and a large diameter part and that has a straight shape suppresses the rebound and backfire phenomenon of spray particles that contradict each other. You can see that

It is sectional drawing which shows one Embodiment of the aerosol product of this invention. It is an expanded sectional view which shows the aerosol valve and pushbutton of the aerosol product shown in FIG. 3a is an enlarged cross-sectional view showing the nozzle mounting member and the injection nozzle of the push button shown in FIG. 2, and FIG. 3b is an enlarged cross-sectional view showing the injection nozzle of the push button shown in FIG. 4A is a cross-sectional view showing the spray state of the aerosol product shown in FIG. 1, and FIG. 4B is a flame length test diagram using the aerosol product shown in FIG.

Explanation of symbols

A Aerosol composition 10 Aerosol product 11 Aerosol container 12 Injection member 13 Pressure-resistant container 13a Pressure-resistant container body part 13b Pressure-resistant container metal part 13c Pressure-resistant container bottom part 13d Pressure-resistant container bead part 14 Aerosol valve 15 Mounting cup 16 Housing 17 Stem 18 Spring 19 Stem rubber 20 Dip tube 21 Gasket 22 Stem hole 23 Housing lower end 24 Liquid introduction hole 26 Cover member 27 Push button 28 Top surface of push button 29 Mounting part 31 Side wall part 32 Injection hole 35 Injection nozzle 35a Upper nozzle 35b Middle nozzle 35c Lower nozzle 36 Nozzle mounting member 37 Stem mounting portion 38 Push button body 39 Nozzle bottom 40 Nozzle cylindrical portion 41 Small diameter portion 42 Large diameter portion 42a Large diameter portion inner surface 43 Nozzle insertion portion 4 buttons in the path of the fitting portion 52 push-button body of the bottom portion 46 bottom communication hole 47 space 51 push-button body of the mounting portion 45 a nozzle mounting member

Claims (6)

An aerosol container having an aerosol valve secured to the opening of the pressure container;
An aerosol composition filled in an aerosol container;
It consists of an injection member attached to the aerosol valve,
The aerosol composition is an aerosol product composed of a stock solution containing a hydrocarbon-based solvent and a combustible liquefied gas, wherein the ratio composition of the stock solution and the combustible liquefied gas is 50/50 to 30/70 (volume ratio). And
Between the aerosol valve and the pressure vessel is provided with only an injection passage through which the liquid of the aerosol composition passes,
The injection member includes three injection holes having different injection directions, a stem mounting portion connected to the aerosol valve, and an injection member inner passage communicating the injection hole and the stem mounting portion.
An aerosol product in which each of the injection holes communicates with the passage in the injection member in a straight line and has a shape that expands stepwise to the outside, which is composed of a large diameter portion and a small diameter portion. The aerosol product according to claim 1, wherein the injection holes of the injection member are provided in a row, and the injection angles of the injection holes on both sides with respect to the central injection hole are the same. The aerosol product according to claim 2, wherein the injection angle is 10 to 45 degrees. The aerosol product according to claim 1, wherein the diameter of the large diameter portion is 0.3 to 0.7 mm, and the diameter of the small diameter portion is 0.1 to 0.5 mm. The aerosol product according to claim 1, wherein a pressure at 25 ° C in the aerosol container is 0.25 to 0.6 MPa. The aerosol product according to claim 1, wherein an injection amount per minute is 10 to 50 g.