JP2012192971A - Aerosol product for application - Google Patents

Abstract

[PROBLEMS] To realize a smooth application without applying clogging due to powder when a liquid containing powder is applied to the skin.
An aerosol product for application includes an aerosol container A filled with a liquid containing powder and a propellant, and an application body B attached to a valve of the aerosol container. The application body B is an aerosol container A. And a sintered porous body 2 attached to the main body 1. A gap 6 is formed between the main body 1 and the sintered porous body 2. The sintered porous body 2 is formed with a through hole 7 having one end opened to the gap 6 side and the other end opened to the outside.
[Selection] Figure 1

Description

  The present invention relates to an aerosol product for coating, and more particularly to an aerosol product for coating that can be smoothly applied to a human body without causing clogging even if it is a liquid containing powder.

  An aerosol product is configured by filling an aerosol container with target contents (liquid) and a propellant, and is ejected by opening a valve mechanism provided at a predetermined portion of the aerosol container. For example, when the liquid is a medicine, quasi-drug, or cosmetic that is directly sprayed onto the skin, such as an anti-inflammatory analgesic, a pest repellent, a lotion, or a hair restorer, there is a problem that the sprayed liquid is scattered. For this reason, an application material may be interposed for the purpose of preventing scattering of the liquid agent (see, for example, Patent Document 1).

  The technology according to Patent Document 1 relates to an applicator unit used when a substance such as a volatile substance, a liquid, a paste, or a solid is applied to a human body, and a distribution valve provided with a porous application hemispherical part in a container Connected to the movable part. And it is comprised so that a distribution valve can be moved with the force which acts when a hemispherical part is applied, and a substance can be applied and distributed via a hemispherical part.

  The porous body represented by the porous coating hemispherical part described in Patent Document 1 is formed by sintering and molding a large number of particles made of a polymer material. In such a hemispherical portion, a continuous gap is formed between the particles, and the substance to be applied is leached to the surface through this gap. Moreover, the smoothness of the surface can be set to a preferable state by appropriately selecting the particle size and molding density of the granules.

  On the other hand, there is an antiperspirant as a liquid agent that directly acts on the skin. This antiperspirant is applied by adding powder to form a liquid in order to obtain a smooth feeling when it adheres to the skin, and filling this liquid into an aerosol container and spraying it toward the required site. I have to.

Japanese Patent Laid-Open No. 08-000740

  As described above, since the antiperspirant provided as an aerosol product is sprayed toward the site to be applied, there is a problem that the liquid agent is scattered. For this reason, the actual situation is that an antiperspirant that can be applied to a required site via an application body is required.

  The gap formed in the porous body including the hemispherical part described in Patent Document 1 is formed in a mesh shape while being regulated by a large number of particles, but the size of the gap is not controlled. . For this reason, when trying to apply a liquid containing powder to the skin through the porous body, the gap formed in the porous body is clogged, and the liquid does not smoothly leach out on the surface of the porous body. The problem that occurred.

  An object of the present invention is to provide an aerosol product for coating that can realize smooth coating without causing clogging due to powder when a liquid containing the powder is applied.

  In order to solve the above problems, an aerosol product for coating according to the present invention includes a liquid agent containing powder, an aerosol container filled with a propellant, and an application body attached to a valve of the aerosol container, and the application body Is composed of a main body attached to the stem constituting the valve of the aerosol container and a polymer sintered porous body attached to the main body, and a gap is formed between the main body and the polymer sintered porous body. In addition, the polymer sintered porous body is formed with a through hole having one end opened to the gap side and the other end opened to the outside.

  In the above-mentioned aerosol product for coating, the polymer sintered porous body is preferably formed from a granule mainly composed of polyethylene, polypropylene, or ethylene / vinyl acetate copolymer.

  In any one of the above aerosol products for coating, the standard average pore diameter of the polymer sintered porous body is preferably in the range of 5 μm to 100 μm.

  In the coating aerosol product according to the present invention, the coating body includes a main body attached to the stem constituting the valve of the aerosol container, and a polymer sintered porous body (hereinafter simply referred to as “sintered porous”) attached to the main body. Body)). Furthermore, a void is formed between the main body and the sintered porous body, and the sintered porous body is formed with a through hole having one end opened to the void side and the other end opened to the outside. Therefore, the liquid sprayed from the valve passes through the main body to reach a void formed between the main body and the sintered porous body, and passes through the gap and the through hole formed in the sintered porous body from the void. And leached on the surface of the sintered porous body.

  In particular, since the through-hole formed in the sintered porous body communicates the gap and the outside, smooth passage of the liquid agent can be realized without causing clogging due to the powder contained in the liquid agent. .

  Moreover, the touch can be made smooth by sintering and molding the sintered porous body using polyethylene, polypropylene, or ethylene / vinyl acetate copolymer granules as raw materials. In particular, by forming the standard average pore diameter in the range of 5 μm to 100 μm, it is possible to improve the feeling of use when contacting the skin and to secure an appropriate amount of application for each operation.

It is principal part sectional drawing of the aerosol product for application | coating which concerns on a present Example. FIG. 2 is a top perspective view of FIG. 1. It is a figure explaining the structure of the sintered porous body which concerns on a present Example.

  Hereinafter, a preferred embodiment of the aerosol product for application will be described with reference to the drawings. The aerosol product for application shown in the figure has an aerosol container A partially described, and an application body B attached to a valve of the aerosol container A. The application body B is attached to the stem 10 constituting the valve of the aerosol container A. When the application body B is pressed against the skin, the liquid agent that has passed through the stem 10 can be leached and applied. Yes.

  The aerosol container A is filled with a liquid containing powder and a propellant, and sprays the liquid pressurized by the propellant as the stem 10 is pressed and moved inward. It is possible.

  Conditions such as the material, particle size, and content of the powder contained in the liquid are not particularly limited, and are preferably set as appropriate according to the function of the liquid. In the case of an antiperspirant as a typical example of a liquid containing such a powder, a porous powder having a particle size of about 20 μm is used as the powder, ethanol is used as the liquid, and the powder is about 1 in the liquid. % To about 10%.

  The propellant for injecting the liquid agent filled in the aerosol container A is not particularly limited. Liquefied petroleum gas (LPG) and dimethyl ether (DME) used as a propellant in general aerosol products, compressed gas such as carbon dioxide and nitrogen gas, and alternative fluorocarbon such as hydrofluorocarbon (HFC), etc. Gas can be selectively used.

  The application body B includes a main body 1 attached to a stem 10 that constitutes a valve of the aerosol container A, and a sintered porous body 2 attached to the surface of the main body 1. A shoulder cover 3 is attached to the aerosol container A, and a cap 4 is detachably attached to the shoulder cover 3.

  The main body 1 includes a top portion 1a, a boss-like attachment portion 1c that protrudes downward from the center of the top portion 1a, engages the stem 10, and has a hole 1b that communicates with the stem 10, and an outer periphery of the top portion 1a. And a mounting portion 1d for mounting the sintered porous body 2 formed as a ring-shaped concave groove.

  In particular, the mounting portion 1d has an inner periphery defined by a falling piece 1e falling downward from an outer periphery of the top portion 1a, an outer periphery defined by a rising piece 1f, and a bottom portion defined by a ring-shaped bottom piece 1g. . When the fitting portion 2b of the sintered porous body 2 is fitted to the mounting portion 1d, the fitting portion 2b is held by the falling piece 1e, the rising piece 1f, and the bottom piece 1g.

  The material constituting the main body 1 having the above shape is not particularly limited, and a thermoplastic resin such as polyethylene or polypropylene can be used. In particular, the material constituting the main body 1 is preferably one that can exhibit a certain degree of elasticity after molding. By having such elasticity, when the sintered porous body 2 is mounted, Even when the sintered porous body 2 has dimensional variations, the variability can be absorbed.

  The sintered porous body 2 is constituted by using particles of polyethylene, polypropylene, or ethylene / vinyl acetate copolymer as a raw material, and sintering the raw material. That is, the sintered porous body 2 is manufactured by storing polyethylene, polypropylene, or ethylene / vinyl acetate copolymer granules controlled in a predetermined particle size range in a mold, and then molding them under high pressure and high temperature. Has been.

  Thus, by using a material selected from among polyethylene, polypropylene, ethylene / vinyl acetate copolymer and the like as a raw material for the sintered porous body 2, it is possible to improve the feel to the skin during application use.

  In the sintered porous body 2 formed as described above, a large number of particles whose particle sizes are controlled are tightly connected to each other. ) Is formed. For this reason, it is possible to manufacture the sintered porous body 2 whose pore diameter is strictly controlled in the range of 5 μm to 100 μm.

In this example, the sintered porous body 2 has a pore diameter set in a range of 5 μm to 100 μm and a porosity in a range of 30% to 50%. This porosity indicates the ratio of pores in the sintered porous body 2, and when the porosity is D, the bulk density is Dt, and the true density is Do,
D = (1-Dt / Do) × 100
Is calculated by

  The sintered porous body 2 has a shape in which the cup as a whole is turned down. The surface 2a of the sintered porous body 2 is formed to have a shape of a part of a sphere, and the outer peripheral portion is a ring-shaped fitting portion that fits into a mounting portion 1d formed of a concave groove provided in the main body 1. 2b. Thus, by forming the ring-shaped fitting portion 2b on the outer peripheral portion of the sintered porous body 2, a cylindrical concave groove 2c is formed at the center, and the main body which is the bottom surface of the concave groove 2c An opposing surface 2d that opposes the top 1a of 1 is formed. The facing surface 2d is formed as a part of a spherical surface having a curvature substantially equal to the curvature of the surface 2a, and the sintered porous body 2 corresponding to the facing surface 2d has a substantially uniform thickness between the surfaces 2a. Have

  The depth of the recessed groove 2 c formed in the sintered porous body 2 has a dimension larger than the height of the falling piece 1 e formed on the outer periphery of the top portion 1 a of the main body 1. For this reason, when the fitting portion 2b of the sintered porous body 2 is fitted to the mounting portion 1d of the main body 1, there is a recess between the top portion 1a of the main body 1 and the facing surface 2d of the sintered porous body 2. A gap 6 having a height corresponding to the difference between the depth of the groove 2c and the height of the falling piece 1e is formed.

  The gap 6 serves as a space for uniformly dispersing the liquid agent containing the powder injected from the stem 10 through the hole 1b of the main body 1 with respect to the through-holes 7 to be described later. It may be formed opposite to. However, it is preferable that the space between the top 1a of the main body 1 and the facing surface 2d of the sintered porous body 2 is formed as one room.

  The depth of the gap 6 is not particularly limited, and is preferably set as appropriate according to the properties of the liquid to be injected, the conditions of the powder contained in the liquid, and the like. However, since the liquid agent stays in the gap 6 every time it is used, if the depth of the gap 6 becomes too large, there is a risk that the amount of the liquid agent that is wasted increases, and if the depth of the gap 6 is small, the sintered porous body There is a risk that it will be difficult to ooze the liquid agent evenly on the surface 2a of 2.

  The sintered porous body 2 is formed with a through hole 7 having one end opened to the facing surface 2d and the other end opened to the surface 2a. The through-hole 7 is for smoothly passing the powder contained in the liquid agent through the surface 2 a of the sintered porous body 2. For this reason, the through-hole 7 is formed with a dimension sufficiently larger than the dimension of the mesh-shaped gap formed in the sintered porous body 2.

  Further, the through-hole 7 is formed through the sintered porous body 2 in the thickness direction, unlike the gap formed in the sintered porous body 2 in a mesh shape. However, the through-hole 7 does not necessarily have to be formed in a straight line, and it is only necessary to penetrate the sintered porous body 2 in the thickness direction even if some bending occurs.

  As described above, the through-hole 7 has a dimension sufficiently larger than the mesh-shaped gap formed in the sintered porous body 2 and is formed through the sintered porous body 2 in the thickness direction. Therefore, the channel resistance is extremely small compared to the channel resistance of the mesh-shaped gap. Therefore, it is possible to smoothly pass the powder contained in the liquid sprayed into the gap 6, and the powder that has passed through the through-hole 7 can be adhered to the surface 2 a of the sintered porous body 2. Is possible.

  The thickness and number of the through-holes 7 formed in the sintered porous body 2 are not limited, and are set appropriately in consideration of conditions such as the particle size and content of the powder contained in the liquid agent and the appropriate amount for each use. It is preferable to do.

  In addition, the method for forming the through-hole 7 is not limited, and a method of forming a core when forming the sintered porous body 2, or after forming the sintered porous body 2 There are methods such as a method of mechanically forming with a drill, and it is preferable to select appropriately in consideration of ease of processing and cost.

  In this embodiment, three through holes 7 having a thickness of about 2 mm are formed in the sintered porous body 2.

  In the main body 1 and the sintered porous body 2 formed as described above, the sintered porous body 2 is attached to the main body 1 by fitting the fitting portion 2b of the sintered porous body 2 into the mounting portion 1d of the main body 1. 1 can be applied to form the coated body B. And it is possible to comprise the aerosol product for application | coating by fitting the attaching part 1c of the main body 1 to the stem 10 of the aerosol container A. FIG.

  The shoulder cover 3 is attached to the shoulder portion of the aerosol container A and has a function of detachably attaching the cap 4 to the upper end portion. The shoulder cover 3 has an outer diameter that is substantially the same as the outer diameter of the aerosol container A. A projecting mounting portion 3a that is attached to the aerosol container A is formed inward at the lower end portion, and a cap is formed at the upper end portion. A mounting portion 3b for mounting 4 is formed.

  In the present invention, as the sintered porous body 2, a polymer sintered porous body made of polyethylene, polypropylene, or ethylene / vinyl acetate copolymer is used. The average pore diameter is set in the range of 5 μm to 100 μm. By using the sintered porous body 2 that satisfies the above conditions, the feeling when the sintered porous body 2 directly touches the user's skin, that is, the feeling of use is improved and an appropriate coating amount is obtained. To be able to secure.

  The sintered porous body 2 that is in direct contact with the skin occupies a large specific gravity in contact with the skin, as well as the leaching state of the liquid agent. For this reason, the standard average pore diameter of the sintered porous body 2 is preferably in the range of 5 μm to 100 μm, more preferably in the range of 10 μm to 100 μm, and further preferably in the range of 10 μm to 50 μm.

  The aerosol product for coating according to the present invention is advantageous for use in an aerosol product in which a liquid containing a powder or a short fiber is applied to a human body.

A Aerosol container B Application body 1 Main body 1a Top part 1b Hole 1c Attachment part 1d Mounting part 1e Standing piece 1f Standing piece 1g Bottom piece 2 Sintered porous body 2a Surface 2b Fitting part 2c Concave groove 2d Opposing surface 3 Shoulder cover 3a 3b Mounting portion 4 Cap 6 Air gap 7 Through hole 10 Stem

Claims (3)

An aerosol container filled with a liquid containing a powder and a propellant, and an application body attached to a valve of the aerosol container;
The application body includes a main body attached to a stem constituting a valve of an aerosol container and a polymer sintered porous body attached to the main body, and a gap is formed between the main body and the polymer sintered porous body. And a through-hole having one end opened on the gap side and the other end opened on the outside side is formed in the polymer sintered porous body. The aerosol product for coating according to claim 1, wherein the polymer sintered porous body is formed using a granule mainly composed of polyethylene, polypropylene, or ethylene / vinyl acetate copolymer as a raw material. The aerosol product for coating according to claim 1 or 2, wherein the polymer sintered porous body has a standard average pore diameter in the range of 5 µm to 100 µm.

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