JPH0692382A - Aerosol spray using pure air as propellant and manufacture of the same - Google Patents

Abstract

PURPOSE: To provide an aerosol spray capable of being used in safety and free from the environmental problem by using the purified air as a propellant. CONSTITUTION: In an aerosol spray formed by a spray container 1 for storing the atomized product V2 , a valve element 5 mounted on the spray container 1 and opened by the pressing operation, and a spray head 2 formed by a spray nozzle 7, the air purified through a filtering device, is used as a propellent for releasing the atomized product V2 . The air propellent can be purified by being passed through at least a dedusting filter, a chemical filter and an antibacterial filter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol spray using clean air as a propellant, and a method for producing an aerosol spray which effectively purifies air as a propellant and fills a spray container. is there.

[0002]

2. Description of the Related Art Aerosol sprays for spraying liquid substances (spray products) to be sprayed, such as cosmetics and drugs, are generally used in a spray container together with the spray products, in the form of liquid or gaseous CFCs, carbon dioxide, butane. , A propellant such as propane, nitrogen, or LPG is filled. The spray container filled with the spray product and the propellant usually has a spray nozzle head equipped with a valve body, and the valve body is opened by pushing down the nozzle head, and the spray product is sprayed by the pressure action of the propellant. The structure is such that it is emitted from the spray nozzle of the nozzle head.

When the spray product is spray-released, the propellant to be filled in the spray container is mixed with the spray product and is discharged, and consequently is dissipated into the atmosphere. It has been pointed out in recent years that, when a propellant, which is a chemical substance as described above, is released into the air, it adversely affects the human body to a large extent and causes various pollutions and environmental damages. Despite the fact that the above propellants have favorable properties as a pressure medium for a spray mechanism, some of these propellants are restricted in their use due to such environmental problems, or have a prohibition measure. Some are taken. For example, when Freon is used as a propellant in a spray product such as a medicine containing water-containing ethyl alcohol or cosmetics, hydrogen chloride (HCl) is generated in Freon. As is well known, this hydrogen chloride has an oxidizing property similar to carbon dioxide gas and is not suitable for some applications. In addition, handling of flammable substances such as LPG requires careful handling. Further, propellants such as CFCs are sensitive to temperature changes, and even if the temperature rises slightly, the inside of the spray container is brought to a high pressure state.

A liquid or pasty product dispenser using compressed air as a propellant is disclosed in US Pat. No. 3,984,0.
No. 34 is proposed. This device stores a bag containing a product in a container, fills compressed air with an air cartridge, and operates a piston built in the container by the air pressure released from the air cartridge to operate the product in the bag. Is to be pushed out of the container.
According to this structure, there is an advantage that the product and the propellant can be separated, but the structure is extremely complicated, and since the air pressure by the propellant becomes high, there is a drawback that a structural failure easily occurs.

Even if air is used as a propellant in a spray container together with the spray product, various impurities and bacteria / miscellaneous bacteria in the air adversely affect the spray product, deteriorating the quality of the product and degrading the product. It causes inconvenience such as making it happen.

[0006]

SUMMARY OF THE INVENTION In order to solve the above conventional problems, the present invention provides an aerosol spray using a spray propellant which is safe for the human body and does not cause pollution or environmental damage. The purpose is to provide.
Another object of the present invention is to propose a method for producing an aerosol spray, which is safe and produces a spray propellant which does not cause pollution or environmental damage and which can be filled into a spray container in a safe, simple and reliable manner. To do.

[0007]

In order to achieve the above object, an aerosol spray according to the present invention comprises a spray container for containing a product to be sprayed and a pressure propellant for discharging the product, and an opening of the spray container. It is characterized in that it comprises a spray head composed of a valve element which is mounted and opened by a pressing operation and a spray nozzle, and air which has been passed through a filter device and purified is used as the propellant. The method for producing the aerosol spray of the present invention comprises:
Inject the product to be sprayed into the spray container, make compressed air with an air compression device that takes in the atmosphere, pass the compressed air from this air compression device to the filter device to make clean air, and compress it from the filter device. It is characterized by injecting air into the spray container.

[0008]

The filter device has a multi-stage structure of one or more dust removing filters, a chemical filter containing activated carbon, etc., and a sterilizing filter, and removes dust, bacteria, and germs from the air taken in to create clean air. Compressed air injected into the spray container is at least 2. when the nebulized product has been completely expelled from the spray container.
Set the initial injection pressure to hold 2 bar.

The sprayed product is sprayed from the spraying nozzle by pressing the spray head attached to the spray container by the compressed air as a propellant filled in the spray container together with the sprayed product. Since air is used as the propellant, it does not affect the human body, is safe, can be manufactured at low cost, and does not cause inconveniences such as pollution and environmental problems.

[0010]

EXAMPLE An example of the aerosol spray according to the present invention will be described with reference to FIG. This aerosol spray comprises a spray container 1 made of metal or reinforced resin and having an opening at the top, and a spray head 2 fitted into the opening. The spray container 1 is provided with a collar 3 at the periphery of the opening, and the collar portion 4 of the spray head 2 is hermetically joined thereto by welding or another joining method. The spray head 2 includes a valve body 5 fixed to the collar portion 4. The valve body 5 is normally closed by the spring 6 and is opened by pressing the spray head 2. Further, the spray head 2 has a spray nozzle 7 and communicates with the valve body 5 via a valve pipe 8.

In the figure, 9 is a siphon tube having one end connected to the valve body 5 and the other end suspended down to the bottom of the spray container 1.

In the above structure, when the spray head 2 is pushed down against the spring 6, the valve body 5 is opened, and the spray nozzle 7 is opened from the lower end opening of the siphon pipe 9 through the internal passages of the valve body 5 and the valve pipe 8. A fluid passage is formed in the.

The spray container 1 is filled with compressed air V1 as a propellant and a substance (spray product) V2 to be sprayed. When the spray head 2 is pushed down in this state, the sprayed product V2 inside the spray container 1 is compressed by the compressed air V2.
A pressure P of 1 causes the spray to be expelled from the spray nozzle 7 through said passage.

Compressed air V1 filled in the spray container 1
Is cleaned by removing minute dust, bacteria and various bacteria from the atmosphere.

The pressure P of the compressed air V1 is determined by the spray container 1
The initial product air pressure is set to maintain an air pressure of 2.2 bar or higher when the spray product V2 is completely discharged from the device and only the air V1 remains in the spray container.
For example, in a spray container 1 with an internal volume of 100 ml, 70
When the product volume of volume% is filled (V1: V2 = 30:
70%), the internal pressure after the complete release of the spray product V2 is 2.
In order to be above 2 bar, the initial air filling pressure is 7.4.
Must not be below bar. A system capable of realizing a method of generating dustless / sterile clean air and filling the spray container 1 under the above pressure condition will be described below with reference to FIG.

The system for producing an aerosol spray according to the invention comprises an air squeezing device 11 and a prefilter 1.
2, a compressed air tank 13, and a control valve 14 for adjusting the flow rate.
And a filter device 15, an injection cylinder 16 and an injection head 17. The air compression device 11 takes in air in the atmosphere to generate high-pressure air, and a known compressor can be used.

In the front filter 12, as shown in FIG. 3, the outlet A2 is several times larger than the opening area of the air inlet A1 connected to the air compressor 11, and the air introduced from the inlet A1 is the front filter. The inside of 12 is designed to flow at an extremely low speed. Further, the inside of the front filter 12 is kept at 0 degrees Celsius or less, and moisture or oil in the air flowing at a low speed is solidified and settles down on the bottom surface of the front filter 12. Of course, impurities such as soot in the air as well as water and oil are also removed.

The air from the air tank 13 is filtered by a filter unit 15 to remove impurities such as fine dust and the like, as well as bacteria and germs in the air.

The filter device 15 is composed of a multi-stage filter as shown in the figure, and is composed of first to fourth stage filters 15a to 15d here. The first-stage filter 15a is a dust-removing membrane filter in which a large number of chemical-resistant hollow fibers are bundled, and completely removes particles of 0.05 to 0.03 mm or more. The second-stage filter 15b comprises a layered chemical-resistant dust-removing porous membrane filter,
Particles of 0.02-0.01 mm or more are completely removed.
The third-stage filter 15c is a chemical filter, which is filled with a granular adsorbent such as activated carbon, and completely removes colloidal pollutants and insoluble substances. The fourth-stage filter 15d is a micro-bacterial filter having a fine porous structure, and has static electricity to adsorb and remove residual impurities and bacteria / miscellaneous bacteria up to about 0.2 μm.

The filter device 15 is provided with a switching valve 18 on the output side of the second stage filter 15b, and the third or fourth stage filters 15d, 15d can be used or not used as desired.

All the impurities in the air are almost completely removed by the four-stage filter, and clean air can be obtained. The clean air thus dedusted and disinfected is once put into the injection cylinder 16 and then injected into the spray container 1 using the injection head 17.

In the figure, c1 and c2 are safety valves, 13a is a pressure regulator used when adjusting the internal pressure of the air tank 13, and 19 is a cock.

[0023]

As described above, according to the present invention, it is possible to safely and surely fill the spray container with the sprayed product with the air that has taken in the air and has substantially multi-stage filters to completely remove dust and bacteria. It is safe and safe because it uses clean air as the propellant for aerosol spray.
It does not cause pollution or environmental damage. In addition, since it is possible to use air as a propellant for aerosol spray, any liquid product, regardless of the type of food, cosmetics, paint, or drug, is stored in a spray container and is safely sprayed and discharged as needed. be able to. Therefore, the present invention is most suitable for an aerosol spray for spraying various liquid products.

[Brief description of drawings]

FIG. 1 is a side sectional view schematically showing an embodiment of an aerosol spray according to the present invention.

FIG. 2 is a schematic diagram showing a system for producing an aerosol spray according to the present invention.

FIG. 3 is a schematic explanatory diagram of a pre-filter applied to the aerosol spray manufacturing system of the present invention.

[Explanation of symbols]

 1 spray container 2 spray head 15 filter device

Claims (8)

[Claims] 1. A spray head comprising a spray container containing a liquid product to be sprayed and a pressure propellant for discharging the liquid product, a valve body mounted in an opening of the spray container and opened by a pressing operation, and a spray nozzle. An aerosol spray using air as a propellant, which is purified by passing through a filter device. 2. The initial filling pressure of the injecting air is set so that the inside of the spray container holds approximately 2.2 bar after the liquid product contained in the spray container is completely discharged. Aerosol spray. 3. An aerosol spray according to claim 1, wherein the air is cleaned through at least one dust filter. 4. The aerosol spray according to claim 2, wherein the air is cleaned through at least one dust filter. 5. The aerosol spray according to claim 3, wherein the air is further cleaned through a chemical filter and a sterilization filter. 6. The aerosol spray according to claim 4, wherein the air is further cleaned through a chemical filter and a sterilization filter. 7. A method for producing an aerosol spray, wherein air is cleaned through a filter device including at least one dust filter, a chemical filter and a sterilizing filter, and is injected into a spray container by an injection head. 8. The method for producing an aerosol spray according to claim 7, wherein the air is made into compressed air by an air compression device and sent to the filter device through a prefilter and a compressed air tank.