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Intermittently sprayed aerosol product for skin

Inactive Publication Date: 2003-07-03
DAIZO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016] Moreover, when the amount of the liquefied gas contained in the aerosol composition is less than 20% by weight, mist-like injection is hard to perform and liquid dripping is increased over an injection surface. Moreover, if the aerosol composition is homogeneous, the pressure of the product is reduced. Therefore, pressure accumulation in a pressure chamber which will be described below is delayed and the ratio of the injection time to the stop time easily becomes less than 0.1. Moreover, even if the ratio of the injection time to the stop time is 0.1 to 5.0, both the injection time and the stop time are increased, and injection in a short cycle is not carried out, for example, one cycle or more is not set for one second. In some cases, therefore, the massage effect is reduced.
[0071] As shown in FIG. 2(C), subsequently, when the content is injected toward the outside through the clearance, the pressure of the pressure chamber 20 is started to be dropped such that the piston 5 is returned in the valve closing direction through the first coil spring 8 without fully injecting the content. However, the difference between a pressure on the tip side of the needle valve 6 and a pressure on the rear end side thereof is reduced simultaneously with the injection of the content. Therefore, the needle valve 6 is repelled in a direction of an arrow K through the second coil spring 7 and is thereby pushed back to a position shown in the drawing. As a result, an injection passageway for the content can be sufficiently maintained until the piston 5 is returned to the valve closing position (the position shown in FIG. 1).

Problems solved by technology

Depending on an injection time and a stop time, however, a feeling of stimulation is too great or too small, which is not preferable.
Consequently, a great deal of time and labor is required.
Therefore, it is hard to carry out the intermittent injection at a small interval.

Method used

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  • Intermittently sprayed aerosol product for skin

Examples

Experimental program
Comparison scheme
Effect test

examples 6 to 10

[0081] The same concentrate as that in Example 1 was filled in a pressure container formed of aluminum and a nitrogen gas to be a compressed gas was filled to a predetermined product pressure shown in Table 2 to obtain an aerosol product. In the same manner, an injection time and a stop time were measured. The result is shown in Table 2.

2 TABLE 2 Ex. 6 Ex. 7 Ex. 8 Ex. 9 Ex. 10 Product pressure (MPa) 0.20 0.30 0.50 0.70 0.90 Compressed gas weight (%) 0.23 0.32 0.51 0.68 0.86 Injection time (second) 0.032 0.038 0.041 0.046 0.051 Stop time (second) 0.143 0.133 0.069 0.052 0.041 Injection / stop 0.22 0.29 0.59 0.88 1.24 Cycle (times / second) 5.7 5.8 9.1 10.2 10.9

examples 11 to 13

[0082] An aerosol composition (Example 11) containing 60% by weight of the same concentrate as that in Example 1 and 40% by weight of dimethylether, an aerosol composition (Example 12) containing 70% by weight of the same concentrate and 30% by weight of dimethylether, and an aerosol composition (Example 13) containing 40% by weight of the same concentrate and 60% by weight of dimethylether were filled in a pressure container formed of aluminum. Thus, an aerosol product was obtained. The aerosol product thus obtained was maintained at 25.degree. C., the same injection button as that in Example 1 was attached thereto, and an injection time and a stop time were measured in the same manner. The result is shown in Table 3.

examples 14 and 15

[0083] An aerosol composition (Example 14) containing 50% by weight of ethanol to be a concentrate and 50% by weight of liquefied petroleum gas having a vapor pressure of 0.35 (MPa) at 20.degree. C., and an aerosol composition (Example 15) containing 50% by weight of ethanol and 50% by weight of liquefied petroleum gas having a vapor pressure of 0.40 (MPa) at 20.degree. C. were filled in a pressure container formed of aluminum so that an aerosol product was obtained. The aerosol product thus obtained was maintained at 25.degree. C. and the same injection button as that in Example 1 was attached. In the same manner, an injection time and a stop time were measured. The result is shown in the Table 3.

3 TABLE 3 Ex. 11 Ex. 12 Ex. 13 Ex. 14 Ex. 15 Product pressure (MPa) 0.33 0.27 0.44 0.39 0.42 Injection time (second) 0.030 0.031 0.031 0.033 0.030 Stop time (second) 0.051 0.083 0.011 0.021 0.016 Injection / stop 0.59 0.37 2.82 1.57 1.88 Cycle (times / second) 12.3 8.8 23.8 18.5 21.7

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Abstract

A ratio of an injection time and a stop time is set to 0.1 to 5.0 when an injection button is operated. Upon operation of the injection button, the injection time and the stop time are repeated at a specified ratio, so that a content can be intermittently injected to a skin including a head skin accurately.

Description

[0001] The present invention relates to an intermittent injection aerosol product for a skin. More particularly, the present invention relates to an intermittent injection aerosol product for a skin in which an injection time and a stop time are repeated at a specific ratio when an injection button is operated, thereby intermittently injecting a content to a skin including a head skin accurately.[0002] Conventionally, an injection device includes an aerosol product and a pump product. In the aerosol product, a concentrate and a propellant are filled in a pressure container and continuously carries out injection when a valve is released. The manner of injection of the aerosol product is generally continuous injection, while quantitative injection or intermittent injection is carried out depending on the use and purpose. The aerosol product for the continuous injection is suitably used for injecting a large amount of aerosol in a space or onto a wall surface. In the case in which the ...

Claims

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Application Information

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IPC IPC(8): B05B1/08B65D83/16
CPCB05B1/083B65D83/26A61H2201/0153A61H9/0007A61H2201/5007A61H2201/0157A61H2201/105A61H2201/1207A61H2201/1246A61H9/0028A61H9/0021
Inventor MEKATA, SATOSHIFUJIO, HIROSHI
Owner DAIZO