JP2006167596A - Aerosol container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerosol container enabling a reduction of a blowing sound peculiar to the aerosol container. <P>SOLUTION: The aerosol container 1 blowing out a content from a discharge port 7 by a pressure of a charge gas is provided. A flow path wall of a blowing-out flow path 9 continuing to the discharge port 7, through which the content passes in blowing out, is formed by a sound-deadening material 8, and a shape of the blowing-out flow path 9 is constituted not to become deformed substantially. The container 1 is provided with a push button 4 fitting in a stem of a container body 2, and a sound-deadening member consisting of the sound-deadening material, arranged in a push button 3. On the sound-deadening member, the blowing-out flow path 9 extending in the axial direction is formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an aerosol container.

  When the contents of the aerosol container are ejected, an ejection sound peculiar to the aerosol container is generated according to the pressure in the container, the ejection speed and the ejection amount of the contents. In some cases, eruption sounds may be uncomfortable, and depending on the scene of use, it may not be desired to notice that the surrounding person is using the aerosol container. In view of this, an aerosol container has been proposed that reduces the ejection noise of the ejected contents. For example, there has been proposed an aerosol container that includes an ejection sound reflecting member and in which an ejection sound wave and a wave reflected by the reflecting member have waveforms opposite to each other (see Patent Document 1). However, this aerosol container is complicated in structure and expensive to manufacture, so it is not compatible with aerosol containers that are generally used products.

  Apart from this aerosol container, there is known an aerosol container in which a sintered body having continuous pores is mounted and fixed at a discharge port of a push button in the aerosol container (see Patent Document 2). As the sintered body, a metal type, ceramic type or plastic type in which continuous fine holes are formed is used. This aerosol container is not intended to reduce the ejection noise, but to suppress the flow rate, soften the spray pattern, and prevent clogging.

JP 2001-293402 A Japanese Patent Laid-Open No. 10-329879

  Accordingly, an object of the present invention is to provide an aerosol container that can eliminate the various disadvantages of the prior art described above.

  The present invention is an aerosol container in which contents are ejected from a discharge port by the pressure of a filling gas, and a flow passage wall of an ejection flow passage that is connected to the discharge port and through which the content passes at the time of ejection is formed of a silencer And the said objective is achieved by providing the aerosol container comprised so that the shape of this ejection flow path may not change substantially.

  According to the aerosol container of the present invention, it is possible to reduce the ejection noise peculiar to the aerosol container. Therefore, it is possible to reduce the discomfort caused by the erupting sound, and it is difficult to notice that the surrounding person is using the aerosol container.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The aerosol container 1 of the embodiment shown in FIG. 1 and FIG. 2 is one in which the contents are ejected from the discharge port by the pressure of the filling gas. The container 1 includes a container body 2 in which contents are stored and a push button 3. A valve 4 is attached to the container body 2 so as to close the opening. The peripheral edge of the valve 4 is fastened to the opening of the container body 2 by caulking. As shown in FIG. 2, the push button 3 is formed with a fitting portion 5 with a stem (not shown) of the valve 4. When the push button is pushed down, the valve is operated, and the contents are ejected from the stem together with the gas.

  The push button 3 is formed with a vertical hole 6 at a substantially central portion thereof. The vertical hole 6 communicates with the stem outlet. A columnar (silencer) member 8 made of a silencing material is disposed in the push button 3. The columnar member 8 has a cylindrical shape, and is arranged so that the axial direction thereof is substantially orthogonal to the height direction of the container 1. The columnar member 8 is formed with a through hole 9 extending in one direction toward the axial direction.

  The through hole 9 has a substantially circular cross section (cross section in a plane orthogonal to the extending direction). One end of the through hole 9 is connected to the discharge port 7. On the other hand, the other end of the through hole 9 is connected to the vertical hole 6 formed in the push button 3. As a result, in the push button 3, a jet passage for the contents, which is composed of the vertical hole 6 and the through hole 9 and connects the stem and the discharge port 7, is formed.

  A chip cover 10 is attached to the push button 3. The chip cover 10 is fixed to the push button 3 by being fitted to and fitted to the push button 3. The chip cover 10 has a discharge port 7 for contents.

  As described above, the columnar member 8 is made of a sound deadening material. Since the through-hole 9 formed in the columnar member 8 constitutes a part of the ejection flow path of the contents, a part of the flow path wall of the ejection flow path is formed of a sound deadening material. Become. Therefore, the sound generated when the content is ejected by pushing down the push button 3 is reduced by the silencer while the content passes through the ejection flow path. As a result, it is possible to reduce the discomfort caused by the erupting sound, and it is difficult to notice that the surrounding person is using the aerosol container.

  The through hole 9 formed in the columnar (silenced) member 8 is configured such that its shape is not substantially deformed. “Substantially not deformed” means that the through-hole 9 does not deform even when the ejection pressure of the contents varies somewhat, and that the through-hole 9 does not deform due to an external force applied in a normal use situation of the aerosol container 1. . In this embodiment, in order to prevent substantial deformation, the periphery of the columnar member 8 is covered with a chip cover 10 serving as deformation preventing means, and deformation due to external force is prevented. The inner surface of the cover 10 is configured to contact more than half of the area of the outer surface of the columnar member 8. By being configured in this way, a stable silencing effect can be obtained even when the ejection pressure of the contents fluctuates from the start of injection to during injection. Note that when the chip cover is provided as the deformation preventing means as in this embodiment, the columnar member may not be completely covered, and the area and position of the inner surface contacting the columnar member may be appropriately changed as long as they function as the deformation preventing means. Good. That is, a horizontal hole can be provided in the chip cover, or the entire chip cover can be formed in a net shape.

  As the silencer, those used as a silencer in various fields can be used without particular limitation. For example, a porous polyurethane, a sintered body of synthetic resin powder, a fiber material, a rubber material, a porous ceramic material, or the like can be used.

  From the viewpoint of further enhancing the silencing effect, the silencing material is preferably composed of a porous material. Examples of the porous material include porous polyurethane, a sintered body of synthetic resin powder, and a fiber material.

  As the porous polyurethane, a foamed sponge-like material can be used.

  As the sintered body of the synthetic resin powder, for example, a powder obtained by compression molding and sintering a polyolefin resin powder such as polyethylene or polypropylene can be used. As the pores of such a sintered body, both closed cells and open cells can be used.

  As the fiber material, natural fibers, synthetic fibers, stainless wool, glass wool, ceramic wool and other webs, tows, felts, cloths and the like can be used.

  Depending on the material and manufacturing method, the porous material may have an open cell or a closed cell. Any type of porous material can be used in the container 1 of the present embodiment. In particular, it is preferable to use an open cell porous material from the viewpoint of a high silencing effect.

It is considered that the length and the cross-sectional area of the through-hole 9 in the sound deadening member 8 affect the sound deadening effect. The present inventors have conducted experiments in a range in which the length of the through hole 9 is 5 to 20 mm and the cross-sectional area of the through hole 9 is 0.7 to 4 mm ^2, and have confirmed that a silencing effect has been obtained. .

  As the contents stored in the container 1 of the present embodiment, both liquid and powder are used. As the contents, what is sprayed on the human body includes hair restorers, hair sprays such as hair sprays, deodorants and antiperspirants such as antiperspirants, cosmetics such as shaving cream and after-shave lotion, and muscle anti-inflammatory agents. . Household products include toilet deodorants and fragrances, glass cleaners, clothes deodorants, insecticides, and household paints. The contents are filled in the container 1 together with a liquefied propane gas as a propellant or a mixed gas of this and isopentane. Various other gases can be selected in relation to contents, and carbon dioxide gas, nitrogen gas, compressed gas of nitrous oxide, DME, or the like may be used.

  Next, a second embodiment of the present invention will be described with reference to FIG. For points that are not particularly described with respect to the second embodiment, the description in detail regarding the previous embodiment is applied as appropriate. In FIG. 3, the same members as those in FIGS. 1 and 2 are denoted by the same reference numerals.

  In this embodiment, the point that the muffling member 8 is attached to the push button 3 is the same as that of the embodiment described above. However, in the present embodiment, the chip cover for fixing the muffling member 8 is not attached, and the tip of the muffling member 8 is exposed to the outside. Accordingly, in the present embodiment, the contents are ejected from one end of the through hole 9 of the muffler member 8.

  In the present embodiment, the sound deadening member 8 is fixed to the push button 3 by means such as adhesion using an adhesive or the like, or fitting. Since the front end portion of the sound deadening member 8 is exposed to the outside, the sound deadening member 8 has a rigidity that does not deform due to an external force applied to the sound deadening member 8 in a normal use situation of the aerosol container. preferable. Since the sound deadening material is generally a soft material in many cases, when the sound deadening member 8 is made of such a soft material, the sound deadening member 8 is divided into a hard outer shell portion extending in the axial direction and the outer portion. It is preferable to form a double structure having a core part softer than the shell part and to form the through hole 9 in the core part. This hard outer shell portion functions as a deformation preventing means in the same manner as the above chip cover. In order to make the outer shell portion hard, for example, a hard material is used as a material constituting the outer shell portion, and a material having a silencing action is used for the core portion, and the outer shell portion and the core portion are formed by a two-color molding technique. What is necessary is just to shape | mold simultaneously. Alternatively, a precursor member having the same shape as the sound deadening member 8 is formed from a soft material, and a chemical treatment is applied to the side surface portion of the precursor member so that the portion from the side surface portion to a portion having a certain depth becomes hard. May be. As another alternative, a soft silencer may be fitted into a cylindrical member made of a hard material and having a predetermined thickness to form a dual structure silencer 8.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

[Example 1]
An aerosol container 1 having the structure shown in FIGS. 1 and 2 was manufactured. Cylindrical porous polyurethane was used as the sound deadening member 8 disposed in the push button 3. The muffling member 8 has a length of 10 mm and a diameter of 5.4 mm, and a through-hole having a diameter of 1 mm is provided along the central axis. The diameter of the discharge port provided in the chip cover 10 for fixing the sound deadening member 8 to the push button 3 was 1 mm. The aerosol container 1 was filled with an antiperspirant together with liquefied propane gas as a propellant. The initial internal pressure of the container 1 was set to 0.25 MPa.

[Comparative Example 1]
A push button of a commercially available aerosol container (Eight for Powder Spray manufactured by Nivea Kao) was used. This button was of a one-piece type, and no sound deadening material was attached. The diameter of the discharge port was 0.5 mm. The contents and filling pressure were the same as in Example 1.

[Comparative Example 2]
A commercially available aerosol container (New Men Eight for Exhilarating Jet Spray manufactured by Nivea Kao) was used. This container is a two-piece type in which a chip cover is attached to a push button, and no sound deadening material is attached. The diameter of the discharge port was 0.5 mm. The contents and filling pressure were the same as in Example 1.

[Performance evaluation]
About the aerosol container obtained by the Example and the comparative example, the content was ejected at 1.5-2.5 g / 5 second. The ejected sound was measured with a noise meter installed at a position 10 cm away from the container. The results are shown in Table 1.

  As is apparent from the results shown in Table 1, it can be seen that the aerosol container of Example 1 to which the sound deadening material is attached has a lower injection sound than the containers of the comparative examples.

It is a perspective view which shows one Embodiment of the aerosol container of this invention. It is a longitudinal cross-sectional view of the push button shown in FIG. It is a longitudinal cross-sectional view (FIG. 2 equivalent drawing) of the pushbutton in 2nd Embodiment of the aerosol container of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aerosol container 2 Container main body 3 Push button 4 Mounting cup 5 Fitting part 6 Flow path 7 Discharge port 8 Silencer member 9 Through-hole 10 Chip cover

Claims (6)

  An aerosol container in which the content is ejected from the discharge port by the pressure of the filling gas, and the flow passage wall of the ejection flow path that is connected to the discharge port and through which the content passes at the time of ejection is formed of a sound deadening material. An aerosol container configured such that the shape of the flow path is not substantially deformed.   A push button fitted to the stem of the container main body, and a sound deadening member made of the sound deadening material disposed in the push button, wherein the jet flow path extending in one direction is formed in the sound deadening member, the jet flow The aerosol container according to claim 1, wherein the contents are ejected from one end of the path and the other end is connected to the stem.   The jet cover further includes a tip cover that is fitted to the push button and fixes the silencer member to the push button in the fitted state, the discharge port is provided in the tip cover, and the ejection channel formed in the silencer member The aerosol container according to claim 2, wherein one end of the nozzle is connected to the discharge port.   The aerosol container according to any one of claims 1 to 3, wherein the silencer is made of a porous material.   The aerosol container according to claim 4, wherein the porous material is made of porous polyurethane, a sintered body of synthetic resin powder, or a fiber material. The sound deadening member has a hard outer shell portion extending in the axial direction and a core portion softer than the outer shell portion, and the ejection flow path is formed in the core portion. The aerosol container according to any one of 6.