JPH11244747A - Aerosol spraying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol spraying apparatus which does not wet an object to be sprayed nor contaminates the object to be coated and the atmosphere. SOLUTION: This aerosol spraying apparatus 10 comprises a button 20, a nozzle stem 22 in which the button 20 is fitted, a mountain cup 2 fixed on the upper part of an aerosol can through a gasket rubber 31, and a housing 32 fixed through a stem rubber 31 and elastically supporting the nozzle stem 22 by a spring 33 and a dip tube 34 is attached to the lower end of the housing 32. In the case D1 , D2 , D3 , and D4 are respectively defined as the surface area of an inlet orifice of the lower end of the housing, the total surface area of vapor taps 35 formed in the housing 32, the total surface area of orifices 25 usually closed by the stem rubber 31, and the surface area of the spraying port 24 in the front of the button 20, respective surface areas are so controlled as to satisfy D2 >=D3 >=D1 >=D4 .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an aerosol spray containing an active ingredient, which is sprayed onto an object or into a space without retaining a liquid jet residue and contaminating the object and the space. The present invention relates to an aerosol spraying device that is not likely to be affected.

[0002]

2. Description of the Related Art At present, aerosol products are conveniently and widely used in various fields. They are, for example, insecticides,
Although applied to fragrances, deodorants, antistatic agents, etc., conventional products suffer from the inconvenience of leaving a liquid projectile on the target when sprayed on the target. I was not spared. The residues are mainly solvents, surfactants,
Although it was water and oil, it remained for the following reasons.

For example, in the case of an antistatic agent, an aerosol product is manufactured as follows. That is, a stock solution serving as an antistatic agent and a propellant such as LPG are filled in a pressure-resistant aerosol can.
First, an example of the composition of the antistatic agent stock solution, It has become.

Next, the aerosol packing is: It has become. Therefore, the ratio of solubilizer and petroleum ether in the stock solution to the total aerosol filling is petroleum ether (35/100) x (96/100) =
33.6 / 100 (33.6% by weight) Solubilizer (35/100) × (1/100) =
0.35 / 100 (0.35% by weight), ie 33.6% by weight of the injected quantity is petroleum ether and 0.35% by weight is solubilizer. These are unnecessary for the purpose of preventing static charge, but are unavoidably used for the production of a stock solution. In addition, petroleum ether has a boiling point of about 50 to 60 ° C., as is well known, and this remains on the surface of the object to be sprayed and wets the surface. It takes 5 to 10 minutes for this to evaporate and disappear. Since the solubilizing agent contains a large amount of a surfactant and the like, the amount is as small as 0.35% by weight, but remains without being easily evaporated. Incorrect selection of the solubilizer may leave unexpected adverse effects on the object to be ejected. These are difficult to use when conventional products are used, and also cause a long time for drying.

[0005] There is also a problem with the scattering of the injected fog. The particle size of the sprayed fog ranges from a few microns to about 60 microns, and they break off with the energy at the time of spraying, and those that adhere to the object to be ejected and those repelled by the surface of the object to repel in the other direction There are two types: those that scatter and those that are sprayed unnecessarily into space and do not go toward the object to be ejected from the beginning, but float in the air. That is, it has been a conventional situation that the object cannot be efficiently sprayed by the injection, which is wasteful and inefficient.

Therefore, as a problem, there is a problem that the effective component is efficiently attached to the object to be ejected without waste, the effective component is surely ejected and adhered, the surface of the object to be ejected is not wetted, and no unnecessary component is attached. There is an urgent need to obtain an aerosol injection device that can be used efficiently in a short time.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has an aerosol can, a nozzle stem protruding from an upper portion of the aerosol can, and is fitted to the nozzle stem and has a nozzle. A button and an aerosol sprayer that is attached to a mountain cup of an aerosol can, elastically holds a nozzle stem, has a housing having a vapor tap, and a dip tube attached to the housing. The sectional area of the inlet orifice at the lower end of the attached housing is D ₁ , the sum of the sectional areas of the vapor taps is D ₂ ,
An aerosol injection apparatus characterized in that, when the total sum of the cross-sectional areas of the orifices opened in the nozzle stem is D ₃ and the injection port area is D ₄ , the relation D ₂ ≧ D ₃ ≧ D ₁ ≧ D _{4 is established.} It is obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a basic structure of an aerosol spraying apparatus 10, wherein 1 is a pressure-resistant aerosol can, 2 is a mountain cup mounted on the can via a gasket rubber 3, and 30 is The valve member is fixed to the mountain cup 2. The valve member 30 includes a housing 32 attached to the mountain cup 2 via a stem rubber 31, and a nozzle stem 22 elastically attached to the housing via a spring 33. A button 20 having a nozzle 24 on the nozzle stem 22
Are fitted in the fitting portion 23. The nozzle stem 22 has an orifice 25 which is closed by a stem rubber 31 when the nozzle stem is raised as shown in the figure.

The housing 32 is provided with a vapor tap 35 for sucking the injected gas at the time of injection. At the time of injection, when the button 20 is pressed down, the nozzle stem 22 also descends against the spring 33, the orifice 25 comes below the stem rubber 31, and the orifice is opened.

The liquid in the can 1 is pushed by the propellant, rises in the dip tube 34 attached to the housing 32, enters the housing from the inlet orifice 37 at the lower end of the housing, rises in the passage 36, and rises in the vapor tap 35. From the orifice 25, enters the passage 26 in the nozzle stem 22,
1 and is injected from the injection port 24.

The area of the orifice 37 is D ₁ , the number of vapor taps 35 is plural (usually three), the total sum of the areas is D ₂ , and the number of the orifices 25 is usually three, but the total area is D _3. , the area of the nozzle hole and D _4. In the conventional aerosol injection device, in the case of the vapor tap method, a relationship of D ₁ > D ₄ ≧ D ₃ ≧ D ₂ is provided between the respective areas. That is, the flow of the content liquid rising from the dip tube is main, and is sucked into this main flow like an ejector device, and mixed with the flow of the small amount of injection gas and the main content liquid coming from the vapor tap, The injection condition was to be improved. However, in this conventional apparatus, the ratio of the content liquid in the ejector is large, and the surface of the object to be ejected is wet as described above.

In the present invention, in order to solve the above-mentioned problem, a large amount of injection gas is introduced from the vapor tap 35 to limit the flow rate of the content component rising from the inlet orifice 37 to an extremely small amount. Thus, the inlet orifice 37
The amount of contents rising from the nozzle is made extremely small, mixed with a large amount of injection gas from the vapor tap 35, and injected from the injection port 34, thereby limiting the flow rate of the content components in the injection body, and A good mixing state with a large amount of propellant gas can be achieved, so that wetting of the object by the liquid can be eliminated.

In the present invention, the sectional area D ₂ of the vapor tap 35 is maximized among the sectional areas D ₁ , D ₂ , D ₃ and D ₄ of the orifices, and D ₂ > D ₃ > D ₁ > D The order is ₄ . Speaking in comparison with the aforementioned ejector, the conventional device flows from the inlet orifice 37 of the cross-sectional area D ₁ in the main flow,
And from vapor tap 35 of the cross-sectional area D ₂ of the injection gas has been sucked, in this invention, vapor tap 3
5 from which the liquid of the content component from the inlet orifice 37 is mixed, and the flow from the inlet orifice and the vapor tap, that is, the flow of the liquid of the content component and the flow of the propellant gas, Its actions and roles are just opposite.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the structure of an aerosol injection device according to the present invention will be described. The diameter of an inlet orifice 37 is 1.3 mm, and three holes 2 mm in diameter are provided in a vapor tap 35. The orifice 25 in the nozzle stem 22 is not necessarily a round hole because the orifice 25 is in a thin portion, and three holes of an appropriate size (for example, 1.76 mm ² ) such as square holes are used.
8 mm. Then the nozzle area D ₄ is 1.327mm ² ,
The total area D ₂ of the vapor tap is (2 mm) ² × (π / 4) ×
3 in 9.42 mm ^2, the total surface D ₃ of the orifice 25 1.76
5.28 mm ² in mm ² × 3, the area of the inlet orifice D ₁ becomes 0.5 mm ² with ^{2 × π / 4 (0.8mm)} . That is, D ₂ >
D _3> a relationship of D _1> D _4.

For example, when an antistatic agent is used as an example of the content liquid, the effective component of a compound having an antistatic effect (such as cetyltrimethylammonium chloride) is made as thick as possible. This is because when dissolving in a liquefied gas (injection material), components other than the desired active ingredient (solvent, moisture, solubilizing agent, etc.) are eliminated, and only the active ingredient is completely dissolved.
This is to avoid mixing a carrier such as a solvent into the sprayed body as much as possible. The thus obtained active ingredient is dissolved in a small amount of solvent as much as possible. The amount of the solvent is preferably as small as possible, but the component concentration is preferably 0.1 to 60%, and more preferably 0.5 to 20%. At the time of production, this stock solution is used in a line at 1% to 30% of the product net amount, preferably

[0016]

The aerosol injection device according to the present invention has the above-mentioned configuration, and an aerosol injection device is provided in which only the effective ingredient is injected onto the object and does not contaminate the object or the space. is there.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of a configuration of an aerosol injection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Aerosol injection apparatus 1 Aerosol can 2 Mountain cup 3 Gasket rubber 20 Button 21 Spout part 22 Nozzle stem 23 Fitting part 24 Spout 25 Orifice 26 Passage 30 Valve member 31 Stem rubber 32 Housing 33 Spring 34 Dip tube 35 Vapor tap 36 Passage 37 Inlet orifice

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuo Iijima 973-5 Otaniguchi, Urawa-shi, Saitama (72) Inventor Masayuki Takabashi 441-2 Sokawa, Kishimachi, Kita-Saitama-gun, Saitama Maison-Sunflower A102

Claims (1)

[Claims] 1. An aerosol can, a nozzle stem protruding above the aerosol can, a button fitted to the nozzle stem and having a nozzle, and a nozzle stem attached to a mountain cup of the aerosol can. Aerosol injection device comprising a housing having a vapor tap and a dip tube attached to the housing, wherein the cross-sectional area of the inlet orifice at the lower end of the housing to which the dip tube is attached is D ₁ , When the sum of the cross-sectional areas of the taps is D ₂ , the sum of the cross-sectional areas of the orifices opened in the nozzle stem is D ₃ , and the area of the injection port is D ₄ , the relation is D ₂ ≧ D ₃ ≧ D ₁ ≧ D _4. An aerosol injection device characterized by having been made.