JPS61153170A - Aerosol for pack - Google Patents

Abstract

PURPOSE:To obtain a pack which is capable of obtaining a foaming pack agent as the rapidly-breakable foam till a final period and excellent in the use feeling by using a double vessel as a vessel and maintaining the internal pressure of both an outside vessel and a flexible inside vessel in the specified range. CONSTITUTION:A double vessel body is formed by providing a flexible inside vessel 3 wherein a closed space part 4 is formed between the inside vessel and an inside wall of an outside vessel 1 to the inside of the outside vessel 1 having a nozzle body 2 fitted with a valve in the upper part. A film forming pack agent composition 7 contg. 0.5-1.5wt% compressed gas (e.g. gaseous carbon dioxide) is sealed in the inside vessel 3 and a liquefied gas 8 (e.g. gaseous 'Freon(R)') having 1.0-3.0kg/cm<2> gas pressure higher than the gas pressure of the inside of the inside vessel 3 is sealed in the closed space part 4. The foam pack agent can be obtained as the rapidly-breakable foam till a final period by using this aerosol for pack. As a result, the pack wherein the drying time is shortened and the use feeling is excellent can be obtained and it is economical without liquid remaining because of the double vessel.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an aerosol for packs.

[Conventional technology and its problems]

The film-forming pack agent (hereinafter simply referred to as "pack agent") is desirably one that can provide a uniform and thin paste-like layer from the viewpoints of its usage method and film drying time.

For this reason, film-forming agents are important, and recently, changes in the formulation of the pack agent itself have been considered. That is, it is known that if a pack agent is used in the form of a continuous foam using an aerosol, the foam disappears quickly when applied to the skin, and a thin paste layer is easily formed. However, with conventional film-forming agents such as polyvinyl alcohol, it is difficult to form continuous bursting fine bubbles using ordinary propellants, and in order to obtain a satisfactory aerosol,
It was necessary to carefully examine the film-forming agent used.

[Means to solve the problem]

The present inventors have discovered the characteristics of a continuous foam pack agent, namely, that the foam disappears quickly when applied to the skin, that the fluidity changes due to foaming, and that there is no liquid flow during application. We conducted intensive research to create an aerosol for bags that forms a uniform, thin film on the skin, dries quickly, and has the characteristics of a bag aerosol that does not change over time in discharge volume, discharge pressure, etc. As a result, they discovered that the above requirements could be satisfied by using a double container as the container and maintaining the internal pressure of the outer container and the flexible container within a certain range, and completed the present invention.

Therefore, the present invention provides a double container body by arranging a flexible inner container that forms a sealed air space between the outer container and the inner wall of the outer container inside an outer container having a nozzle body with a valve on the upper part. A film-forming pack agent composition containing 0.5 to 1.5 wt % compressed gas in the inner container,
The air pressure in the sealed air space is 1.0 to 3.
The present invention provides an aerosol for packs, characterized in that liquefied gas gold is filled at gas pressures higher than 0 to 9/ffl.

Examples of the compressed gas used in the present invention include carbon dioxide gas, argon gas, nitrogen gas, laughing gas, etc. When blending, not only these gases themselves but also compounds that generate them through reaction are used. For example, carbonate or the like may be used. These compressed gases are used to form a film-forming pack composition (hereinafter simply referred to as "pack composition").
It is blended in an amount of 0.5 to 1.5% by weight (hereinafter simply referred to as H).

The pack agent composition contains known pack agent components, for example, 1-5 to 20 times of a film-forming agent made of a known aqueous gel such as PV'A, CMC, and pectin, and 1-1 times of a humectant such as glycerin and PEG. 1. Emulsifier 0-4%, foam stabilizer 0
．． Prepared by blending 1 to 1% and water etc.
Its pH is 5.0-6.5, its viscosity is 50-5000
It is preferable to set it as the range of cps. In addition, when liquefied gas is blended into the composition of the pack agent instead of compressed gas, continuous bursting foam cannot be formed and the pack agent becomes unsuitable.

The internal pressure in the pack agent composition containing compressed gas sealed in a flexible inner container (hereinafter referred to as "foam pack agent") is preferably in the range of zO ~ 5.5 to 9/i,
If the internal pressure is 2.0 kg/d or less, the pack agent composition may not foam, and if the internal pressure is 5.5 kliJ/ff1
In the above case, there is a drawback that the discharge becomes violent and it becomes difficult to pick up the product.

Further, examples of the liquefied gas used in the present invention include known liquefied gases such as chlorofluorocarbon gas and LPG%DME gas. The internal pressure in the sealed state of the liquefied gas is 3
．． It is preferable that it is in the range of 5 to 6.5 kg/cIl; if the internal pressure is lower than this, the pack agent will not be sufficiently discharged,
Moreover, if the amount is more than this, the discharge is violent and dangerous.

Regarding the relationship between the internal pressure of the foam pack agent and the liquefied gas, in order to discharge the pack agent smoothly, the internal pressure of the liquefied gas must be 1.0 to 3.0 kg/i higher than the internal pressure of the foam pack agent. be.

〔Example〕

The present invention will be further explained below with reference to drawings showing embodiments.

Reference numeral 1 denotes an outer container, which has a nozzle body 2 with a valve on its upper part. Reference numeral 3 denotes a flexible inner container, which is disposed inside the outer container 1 so as to form a sealed air space 4 between it and the inner wall of the outer container 1. The material and structure of the inner container 3 do not matter as long as it is flexible, but examples of the material include synthetic resin, metal foil, laminates thereof, rubber, etc. Examples include a simple smooth cylindrical body as shown in FIG. 2 and a bellows cylindrical body as shown in FIG. In addition, 5 shown in Figure 2
1 is a discharge pipe having an appropriate number of small holes 6 in its lower peripheral wall, which is housed in an inner container 3 and whose upper part is connected to a nozzle body 2 with a valve.

Reference numeral 7 denotes a foam pack agent, which is sealed and filled in the flexible inner container 3. Further, 8 is a liquefied gas, which is sealed and filled in the closed air space 4 formed by the inner wall of the outer container 1 and the outer wall of the flexible inner container 3. Note that 9 shown in FIG. 2 is a compressed gas filled above the foam pack agent 7.

[Effect]

Since the present invention is constructed as described above, the pressure of the liquefied gas, which is always in a substantially constant state in the closed air space section 4, is used to maintain the foaming pack agent 7 in the flexible inner container 3 at a constant constant level. It is discharged at a pressure of .

Incidentally, in the embodiment shown in FIG. 1, each time the valve-equipped nozzle body 2 is operated and the valve is opened, a certain amount of the foam pack agent 7 is discharged, and the flexible inner container 3 having the bellows structure is discharged.
is contracted by the pressure of the liquefied gas 8 each time. Since the internal pressure of the flexible inner container 3 is kept almost constant by the pressure of the liquefied gas 8, continuously bursting foam is always produced in a preferable state.

In addition, in the embodiment shown in FIG. 2, compressed gas 9 is further filled above the foam pack agent 7, and a discharge pipe 5 is provided, so the valve can be opened by operating the nozzle body 2 with a valve. When the foam pack agent 7 is opened and a certain amount of the foam pack agent 7 is discharged, the pressure of the compressed gas 9 and the liquefied gas 8 pushes the foam pack agent 7 through the small hole 6 into the discharge pipe 5, and at the same time, the flexible inner container 3 contracts, and the internal pressure of the inner container 3 is kept constant. Moreover, due to the presence of the compressed gas 9, the compressed gas concentration in the foam pack agent 7 does not decrease, making it possible to always form foam in a preferable state.

〔Effect of the invention〕

Accordingly, by using the present invention, it is possible to obtain a foamed pack in the form of continuous foam until the end, and as a result, it is possible to obtain a pack with a short drying time and a good feeling of use. In addition, since it is a double container, there is no remaining liquid, making it economical.

Next, the effects of the present invention will be further explained with reference to test examples.

Test Example 1 A pack composition having the following formulation was prepared, and its 100?
This was filled into various spray containers, and the ease of spreading the pack agent, the condition of the film, and the drying time were compared. The results are shown in Table 1.

(Formulation) PVA 15.0 (%) Hydroxyethylcellulose zO Propylene Glycol 6.0 Ethanol 7.0 Squalane
2.0 POE Sorbitan Monooleate 1.
0 Coconut oil fatty acid diethanolamide 0.5
Purified water 66.5 (spray container) Invention product A: 1III scoop Carbon dioxide gas 0.8-1
? (Internal pressure 3kl?/i+ Outer container Freon 12/11 (90/10110y- (Internal pressure 4kl?/ffl+ Comparative product B: - type container * Freon 122? (Injection pressure 4.
7 skg/crl) Comparative product C: Pack composition only (non-aerosol) * A general aerosol formulation in which the stock solution and gas are mixed in a container, sealed, and then ejected.

(Results) From the results shown in Table 1, the product A of the present invention changes the flow characteristics of the liquid content due to foaming, and is easier to spread than the conventional paste C. It became. Comparison product B
It was found that the bubbles disappeared quickly and a thin and uniform film was formed compared to the conventional method. Furthermore, since a thin and uniform film is formed, the drying time can be clearly shortened compared to comparative products.

Test Example 2 Using the pack agent composition 3054 prepared in Test Example 1, the ease with which the contents came out, the state of foam, and the changes in injection pressure over time were investigated for the double container and single container of the present invention. . The results are shown in Table 2.

(Spray container) Invention product D: Inner container Carbon dioxide gas 0.3? (Internal pressure 1.
2kl? /cI7t) Outer container 70 tons 12/11 (90/10) 10? (Internal pressure 4.0 kp/di) Comparative product E: - type container Carbon dioxide gas 0.5? (Injection pressure 2
．． 5 Yu/cd) From the above results, it is clear that the product of the present invention hardly changes in the ease of taking out the contents, the foam state, and the injection pressure during use, compared to the comparative product.

[Brief explanation of drawings]

Fig. 1 and Fig. t42 are partially cutaway longitudinal sectional views showing embodiments of the pack aerosol of the present invention, and Fig. 3 is a 2
Figure 4 is an explanatory view of the A-A' line cut end of the pack aerosol shown in Figure 2 before it is used, and Figure 4 is A-A' after the pack aerosol shown in Figure 2 has been used.
This is an explanatory diagram of the line-cut end surface. 1: Outer container 2: Nozzle body with valve 3: Flexible inner container 4: Sealed air space 5: Discharge pipe 7: Foam pack agent 8: Liquefied gas or more

Claims (1)

[Claims] Inside the outer container which has a nozzle body with a valve at the top,
A flexible inner container forming a sealed air space between the inner wall of the outer container and the inner wall of the outer container is arranged to form a double container body, and
A film-forming pack agent composition containing 0.5 to 1.5% by weight of compressed gas is placed in the inner container at a pressure of 1.0 to 3.0 kg/cm^ higher than the gas pressure in the inner container. 2. An aerosol for packs that is characterized by being filled with liquefied gas at high gas pressure.