Bag-on-valve, joint member, aerosol valve, and aerosol container

Abstract

Provided is a bag-on-valve which has a small number of components and enables stable high-speed filling.　A ball is movably disposed inside a joint member. When contents are to be filled into a bag through the internal space of a stem and the joint member, the ball is positioned in a predetermined region-for-use-in-filling inside the joint member, and the contents to be filled pass through a passage-for-use-in-filling between the outer peripheral surface of the ball and the inner wall surface of the region-for-use-in-filling of the joint member. When the contents in the bag are to be ejected to the outside through the internal space of the joint member and the stem, the ball is positioned in a predetermined region-for-use-in-ejection above the region-for-use-in-filling inside the joint member, and the contents pass through a passage-for-use-in-ejection between the outer peripheral surface of the ball and the inner wall surface of the region-for-use-in-ejection of the joint member. The cross-sectional area of the passage-for-use-in-filling is configured to be larger than the cross-sectional area of the passage-for-use-in-ejection.

Description

Bag-on-Valve, Joint Member, Aerosol Valve, and Aerosol Container

[0001] The present invention relates to an aerosol bag-on-valve in which a thin film bag (pouch) is airtightly fixed to a valve.

[0002] In aerosol products, a product called BOV (Bag-on-Valve), in which a thin film bag (pouch) is airtightly fixed to a valve, is known from, for example, Non-Patent Document 1. The bag portion of the BOV is disposed inside the aerosol container, and the inside of the bag is filled with the content to be ejected. The space between the bag and the aerosol container is filled with gas. The valve seals the opening of the aerosol container. An aerosol product using a bag-on-valve can accommodate gas and the content in separate spaces inside the aerosol container, so the content inside the bag does not come into contact with the gas or the aerosol container. This can prevent quality deterioration and the like caused by the content coming into contact with the gas or the aerosol container. Therefore, BOV is used in various fields such as medical products, cosmetics, and foods.

[0003] In an aerosol product using BOV, the filling of the content into the bag is performed through the stem of the valve. That is, the content is filled into the bag using the path when the content is ejected. Therefore, it is difficult for BOV to increase the filling speed of the content into the bag.

[0004] To increase the filling speed, Patent Document 1 proposes a BOV (Bag-on-Vessel) in which a bullet-shaped switching valve and an annular separation wall are arranged at the lower part of the stem (bag side). In this structure, when filling the contents, the switching valve is positioned below the hole in the annular separation wall, and when ejecting the contents, the switching valve moves upward and is inserted into the hole in the annular separation wall. A through hole is formed in the center of the bullet-shaped switching valve, and when filling the bag with contents, the contents can pass not only through the through hole of the switching valve but also in the area outside the switching valve, thus increasing the filling speed. On the other hand, when ejecting the contents from the bag, the contents pass only through the through hole of the switching valve, so the ejection speed can be made lower than the filling speed.

[0005] Japanese Patent Publication No. 2002-347864

[0006] https: / / mitanijam.com / bag-on-valve /

[0007] The structure of the BOV described in Patent Document 1 requires the precise manufacturing and preparation of a tiny bullet-shaped switching valve with a through hole in the center. Since the bullet-shaped switching valve is positioned below the stem along with the annular separation wall, the number of parts increases.

[0008] In recent years, there has been a growing demand for filling aerosol containers with large quantities of material in a short amount of time, and for filling highly viscous materials in a short amount of time. Therefore, the development of valve structures that can meet these demands is highly desirable.

[0009] The objective of the present invention is to provide a bag-on valve with a small number of parts that enables stable, high-speed filling.

[0010] To achieve the above objective, the present invention provides a bag-on valve comprising a bag, a cylindrical joint member provided at the opening of the bag, a ball movably disposed inside the joint member, and a stem member connected to the upper part of the joint member and used for ejecting the contents of the bag. When filling the bag with contents through the internal space of the stem and the joint member, the ball is located in a predetermined filling area inside the joint member, forming a filling passage between the outer surface of the ball and the inner wall surface of the filling area of ​​the joint member. When ejecting the contents of the bag to the outside through the internal space of the joint member and the stem, the ball is located in a predetermined ejection area above the filling area inside the joint member, forming an ejection passage between the outer surface of the ball and the inner wall surface of the ejection area of ​​the joint member. The structure of the filling area and the ejection area of ​​the joint member is configured such that the cross-sectional area of ​​the filling passage is larger than the cross-sectional area of ​​the ejection passage.

[0011] According to the present invention, it is possible to provide a bag-on valve with a small number of parts that enables stable, high-speed filling.

[0012] (a) and (b) are cross-sectional views of an aerosol container in which the bag-on valve 1 of an embodiment of the present invention is fixed to the container 50 during spraying, and (c) and (d) are cross-sectional views during filling and at rest. (a) to (c) are enlarged cross-sectional views of the bag-on valve 1 of the embodiment during spraying, and (d) to (f) are enlarged cross-sectional views during filling and spraying at rest. (a) to (c) are enlarged cross-sectional views of the bag-on valve 1 of the embodiment during spraying. (a) to (c) are enlarged cross-sectional views of the bag-on valve 1 of the embodiment during filling and spraying at rest. A cutaway cross-sectional view of the bag of the bag-on valve 1 of the embodiment in its pre-use state, with the bag rolled into a cylinder and secured with tape. Enlarged view of Figure 5. (a) to (d) are cross-sectional views showing the state before filling the bag with contents, at rest after filling, and during spraying, with the bag-on valve 1 of Figure 5 attached to the container 50. (a) to (c) are enlarged cross-sectional views of the bag-on valve 1 of modified example 1 during spraying. (a) to (c) are enlarged cross-sectional views of the bag-on valve 1 of Modification 1 during filling and during stationary injection.

[0013] One embodiment of the present invention will be explained using diagrams.

[0014] <<Embodiment>> The bag-on valve 1 of the embodiment will be described with reference to Figures 1 to 7.

[0015] Figures 1(a) to 1(d) show an aerosol container with a bag-on valve 1 fixed to a container 50, and Figures 2 to 4 are enlarged cross-sectional views of the bag-on valve 1. Figures 5 and 6 show the bag of the bag-on valve 1 rolled into a cylindrical shape and secured with tape before use. Figures 7(a) to 7(d) show the bag-on valve 1 from Figure 5 attached to the container 50, before filling the bag with contents, during filling, at rest after filling, and during spraying.

[0016] As shown in Figures 1 to 7, the bag-on-valve 1 has a structure in which a cylindrical joint member 20 is airtightly fixed to the opening of a bag 10 made of a thin sheet. A ball 23 is arranged inside the joint member 20 so as to be movable in the axial direction.

[0017] In this embodiment, the cross-sectional area of ​​the flow path formed between the outer surface of the ball 23 and the inner wall of the joint member 20 is changed by moving the ball 23 up and down inside the joint member 20. This allows for a higher filling speed when filling the bag 10 with contents through the joint member, by using a flow path with a larger cross-sectional area. On the other hand, when spraying the contents of the bag 10 to the outside, the spraying speed can be suppressed by using a flow path with a smaller cross-sectional area. The ball 23 is a common component, and since it uses the inner wall surface of the joint member 20, no additional parts are required, resulting in a simple configuration that enables stable, high-speed filling.

[0018] The following will explain in detail. As shown in Figures 1 to 7, the joint member 20 includes a cylindrical bag joint 21 fixed to the opening of the bag 10 and a cylindrical housing 22 inserted into the upper opening of the bag joint 21. The bag joint 21 is cylindrical, but its outer shape is a flattened streamlined shape, as shown in Figures 2 to 4, and it is tightly attached to the opening of the bag 10 by adhesive or welding.

[0019] Furthermore, a spring 31 is positioned inside the housing 22 of the joint member 20, and a stem 30 is inserted into the upper end of the housing 22. The lower end of the spring 31 is supported by a stepped portion 27 provided on the inner wall of the housing 22, and the upper end is in contact with the stem 30, biasing the stem 30 upward. The stem 30 is used to eject the contents of the bag 10.

[0020] As shown in Figures 1 and 6, the side surface of the stem 30 is provided with multiple through holes 34 in the circumferential direction to allow the contents to pass through. For example, the stem can be configured with two through holes 34 with a diameter of 0.5 mm in the circumferential direction, or two through holes 34 with a diameter of 0.6 mm in the circumferential direction, or three rectangular holes measuring 1.8 mm x 0.5 mm in the circumferential direction, or three rectangular holes measuring 1.8 mm x 1.0 mm in the circumferential direction. The number of through holes 34 in these configurations is larger and more numerous than the size of the through holes in a typical stem. This enables high-speed filling of the bag 10.

[0021] An annular stem rubber 32 is attached to the outer surface of the stem 30 at the location where a through hole 34 is provided. An annular mounting cup 40 is placed over the stem rubber 32. The periphery of the mounting cup 40 is fastened to the periphery of the opening of the container 50 in an airtight manner.

[0022] Two grooves 25 are provided along the axial direction on the inner wall of the lower end of the housing 22 of the joint member 20 (see Figure 4). The diameter of the lower end of the housing 22 is smaller than the diameter of the ball 23, and an inclined surface 26 is formed on the periphery of the inner wall of the lower end of the housing 22. The inclined surface 26 is shaped to be in close contact with the curved surface of the upper part of the ball 23, except for the part where the grooves 25 are provided. As a result, the region P2 at the lower end of the housing 22 constitutes the region P2 where the ball 23 is located during ejection (ejection region). The grooves 25 serve as passages through which the contents pass during ejection.

[0023] On the other hand, the back joint 21 of the joint member 20 is designed so that the inner diameter of the region below the part in which the housing 22 is inserted is larger than the diameter of the ball 23, as shown in Figure 3.

[0024] A support member 24 is positioned in the region below the bag joint 21 to support the ball 23 on the central axis of the joint member 20. In this embodiment, a cylinder 24a is used as the support member 24. The outer diameter of the cylinder 24a is smaller than the inner diameter of the bag joint 21, and the inner diameter of the cylinder 24a is smaller than the diameter of the ball 23. As a result, the cylinder 24a can accommodate the ball 23 at its upper end and support the ball 23 on the central axis of the joint member 20. Therefore, the region P1 near the upper end of the cylinder 24a becomes the region where the ball 23 is located when the contents are filled (filling region) P1. As a result, the space between the ball 23 and the inner wall of the bag joint 21 becomes a passage for the contents when they are filled.

[0025] The cylinder 24a is supported against the inner wall surface of the bag joint 21 by two beam members 24b.

[0026] <Operation when filling the bag 10 with contents> The contents are filled into the bag 10 from the upper end of the stem 30 through the internal space of the stem 30 and the joint member 20. At this time, the lower part of the ball 23 is pushed down to the filling area P1 inside the bag joint 21 by the pressure of the contents being filled, and is mounted on the upper end of the cylindrical 24a which is the support member 24 (see Figures 1(c), (d), 2(a)-(c), and 3(a)-(c)).

[0027] During filling, when the ball 23 is located in the filling region P1, a passage (hereinafter referred to as the filling passage) F1 is formed between the outer surface of the ball 23 and the inner wall surface of the filling region P1 of the joint member 20.

[0028] As the stem 30 is pushed down, the contents injected from the opening at the upper end pass through the inside of the stem 30, then through the through hole 34 on the side of the stem 30, and enter the housing 22 of the joint member 20. Then, they flow into the bag joint 21 from the lower end of the housing 22. At this time, the opening at the lower end of the housing 22 is not blocked by the ball 23, so the contents flow into the bag joint 21 from the opening at the lower end of the housing 22 without being obstructed by the ball 23. In the internal space of the bag joint 21, the ball 23 is mounted on the upper part of the support member 24, which is the filling area P1, so the incoming contents pass through the filling passage F1 between the outer surface of the ball 23 and the inner wall of the bag joint 21. Furthermore, the contents pass through the passage between the outer surface of the support member 24 and the inner wall of the bag joint 21, reach the lower end of the bag joint 21, and flow into the space inside the bag 10.

[0029] The through-holes 34 in the stem 30 are large in diameter and multiple in number, allowing the contents to flow into the housing 22 at high speed. Furthermore, the filling passage F1 between the ball 23 and the bag joint 21 is designed with a sufficient cross-sectional area to enable high-speed filling. Therefore, the contents can be filled into the bag 10 at high speed.

[0030] <Operation when ejecting contents into bag 10> On the other hand, when ejecting the contents of bag 10 to the outside, when the user pushes down the stem 30, the contents of bag 10 are pushed up by the pressure of the gas filling the space between bag 10 and container 50. As a result, the ball 23 is pushed up to the ejection region P2 by the pressure of the contents, and the upper part of the ball 23 is pressed against the inclined surface 26 on the periphery of the lower end of housing 22 (see Figure 4). The ball 23 closes the opening at the lower end of housing 22, and only the space enclosed by the outer surface of the ball 23 and the groove 25 becomes the passage F2.

[0031] The contents of bag 10 pass through the inside of support member 24 and the passage between the outer surface of support member 24 and the inner wall surface of bag joint 21 to reach the lower end of housing 22. However, since the lower end of housing 22 is blocked by ball 23, the contents flow into housing 22 only through the passage F2 surrounded by the outer surface of ball 23 and groove 25.

[0032] In this case, the cross-sectional area of ​​passage F2 is designed to be smaller than the cross-sectional area of ​​passage F1 during filling. Therefore, the ejection speed of the contents can be controlled to be lower than the filling speed.

[0033] The contents that flow into the housing 22 pass through the through hole 34 of the stem 30 and flow into the internal space of the stem 30, and are ejected to the outside from the opening at the upper end of the stem 30.

[0034] As described above, in this embodiment, the bag-on valve 1, due to the structure of the ball 23 and the inner wall of the joint member 20, pushes the ball 23 down into the filling region P1 during filling, and the lower part of the ball 23 is supported by the support member 43. This forms a filling passage F1 with a large cross-sectional area in a plane perpendicular to the axial direction. On the other hand, during ejection, the internal pressure in the container 50 pushes the ball up to the ejection region P2, and presses the upper part of the ball 23 against the inclined surface 26 at the lower end of the housing 22. This forms an ejection passage F2 with a smaller cross-sectional area in a plane perpendicular to the axial direction than the filling passage F1.

[0035] Therefore, the bag-on valve 1 of this embodiment, despite its simple configuration using a ball 23, enables stable high-speed filling and controlled ejection.

[0036] Specifically, the bag-on valve 1 of this embodiment can form a passage F1 with a large cross-sectional area during filling, allowing a large amount of the filler to be filled into the bag 10 of the aerosol container in a short time. Furthermore, because the cross-sectional area of ​​passage F1 is large during filling, even if the filler has a high viscosity, it can be filled into the bag 10 in a short time. Moreover, during dispensing, the cross-sectional area of ​​passage F2 can be narrowed, allowing for dispensing in small amounts at a lower dispensing speed than during filling.

[0037] As the material of the ball 23, for example, metal (e.g., stainless steel) or resin (e.g., PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), POM (polyoxymethylene), etc.) can be used.

[0038] As the material of the stem 30, metal (for example, brass plated with chromium) or resin (POM, NY (nylon), etc.) can be used.

[0039] As the material of the housing 22, resin (POM, PBT (polybutylene terephthalate), PE, PP, NY, etc.) can be used.

[0040] As the material of the bag joint 21, resin (PE, PP, NY, etc.) can be used.

[0041] The bag 10 can use a composite material in which a plurality of materials are laminated. For example, a film having a structure in which a metal layer or a dielectric layer is laminated on a base material film made of resin (PE, PP, NY, etc.) can be used.

[0042] The joining method of the bag 10 and the bag joint 21 may be any method that can join them airtightly, and adhesion using an adhesive, welding, etc. can be used.

[0043] As the material of the container 50, a material (for example, metal, resin, glass, ceramic, and composite materials thereof) that can withstand the pressure of the gas filled in the container (for example, 1 to 2 megapascals) can be used.

[0044] As the gas filled between the bag 10 and the container 50, for example, N ２ gas, compressed air, CO ２ , and a mixed gas thereof can be used.

[0045] Further, the content filled in the bag 10 may be a fluid. For example, liquids, gases, powders, and granular materials, mixtures thereof can be used.

[0046] Incidentally, before use, the bag-on-valve 1 of the present embodiment can also be wound around the bag 10 and fixed with the tape 60 to have a rod-shaped outer shape as shown in FIG. 5. Thereby, the bag 10 can be easily inserted into the container 50 as shown in FIG. 7(a).

[0047] In this state, when the content is allowed to flow into the bag 10 from the stem 30 (FIG. 7(b)), the tape 60 breaks due to the pressure of the content filled in the bag 10, and the bag 10 expands in the container 50 (FIG. 7(c)), and the bag 10 is filled with the content. On the other hand, when the content in the bag 10 is ejected to the outside, when the user presses down the stem 30, the content in the bag 10 is pushed up by the pressure of the gas filled in the space between the bag 10 and the container 50 and ejected from the stem 30 (FIG. 7(d)). In FIGS. 7(c) and (d), for convenience of illustration, the corners of the outer shape of the bag 10 are shown as rounded shapes, but the structure of the bag-on-valve 1 is the same as the structure of FIGS. 1(a) to (d) except for the shape of the corners of the bag.

[0048] <Modification 1> As a modification of the above embodiment, as the support member 24, instead of the cylinder 24a, a coiled spring having a diameter smaller than the inner diameter of the filling region P1 may be used. Further, the support member 24 may be configured to include both a cylinder and a spring.

[0049] An example in which the cylinder 24a and the coiled spring 110 are arranged as the support member 24 of the bag-on-valve 1 of the above embodiment is shown in FIGS. 8 and 9. The spring 110 is disposed inside the cylinder 24 and is supported by a protrusion 120 provided on the inner wall of the cylinder 24a. The ball 23 is mounted on the upper end of the spring 110.

[0050] When filling the bag 10 with the content, as shown in FIGS. 8(a) to 8(c), due to the pressure of the content flowing in from the upper end of the stem 30, the ball 23 is pushed down to the filling region P1, the spring 110 is compressed, and the ball 23 is mounted on the upper end of the cylinder 24a. Thereby, a filling passage F1 is formed between the outer peripheral surface of the ball 23 and the inner wall surface of the filling region P1 of the joint member 20, and the content can be filled into the bag 10 through the filling passage F1.

[0051] On the other hand, when ejecting the contents of bag 10 to the outside, the user pushes down the stem 30, and the contents of bag 10 are pushed up by the pressure of the gas filling the space between bag 10 and container 50. As a result, ball 23 is biased by the pressure of the contents and the stretching force of spring 110, and is pushed up to ejection region P2, and the upper part of ball 23 is pressed against the inclined surface 26 of the periphery of the lower end of housing 22 (see Figures 9(a) to (c)). Ball 23 closes the opening at the lower end of housing 22, and only the space enclosed by the outer surface of ball 23 and the groove 25 becomes the passage F2.

[0052] Since the cross-sectional area of ​​passage F2 is designed to be smaller than the cross-sectional area of ​​passage F1 during filling, the ejection speed of the contents can be controlled to be lower than the filling speed.

[0053] <Modification 2> In the above embodiment, the stem 30 may be divided into a stem base member and a stem upper member. The stem base member is inserted into the opening at the upper end of the joint member 20. The through hole 34 is provided in the stem base member, and the stem rubber 32 is attached thereto. The mounting cup 40 is mounted on top of the stem rubber 32.

[0054] When the stem 30 is divided into a stem base member and a stem upper member, the valve-on-bag consists only of the stem base member, and the mounting cup 40 is fastened to the opening of the container 50. The contents are filled via the stem base member.

[0055] This allows the upper stem member to be attached to the upper end of the stem base member before use after filling with contents, and offers advantages such as the ability to attach a stem upper member of the shape desired by the user.

[0056] Furthermore, if the contents ejected from inside the bag 10 toward the outside are food, it may be unhygienic if the contents remain downstream of the through-hole 34 (towards the tip of the stem 30) after use. As in Modification 2, if the stem 30 has a structure that allows it to be separated into a stem base member and a stem upper member, there is also the advantage that the stem upper member can be easily removed from the stem base member and cleaned after use (after the contents have been ejected).

[0057] <Modification 3> The bag may be removed from the bag-on-valve 1 of this embodiment, and only the valve may be attached to the opening of the container 50 to constitute an aerosol container.

[0058] In this case, by using the valve of the above embodiment, it becomes possible to rapidly fill the container 50 with contents via the stem 30.

[0059] 1 Bag-on-valve 10 Bag 20 Joint member 21 Bag joint 22 Housing 23 Ball 24 Support member 24a Cylinder 24b Beam member 25 Groove 26 Inclined surface 27 Step 30 Stem 31 Spring 32 Stem rubber 34 Through hole 40 Mounting cup 43 Support member 50 Container 60 Tape 110 Spring

Claims

1. A bag-on valve comprising: a bag; a cylindrical joint member provided at the opening of the bag; a ball movably disposed inside the joint member; and a stem connected to the upper part of the joint member and used for ejecting the contents of the bag, wherein when filling the bag with contents through the internal space of the stem and the joint member, the ball is located in a predetermined filling area inside the joint member, forming a filling passage between the outer surface of the ball and the inner wall surface of the joint member; when ejecting the contents of the bag to the outside through the internal space of the joint member and the stem, the ball is located in a predetermined ejection area inside the joint member closer to the stem than the filling area, forming an ejection passage between the outer surface of the ball and the inner wall surface of the joint member; and the structure of the filling area and the ejection area of ​​the joint member is configured such that the cross-sectional area of ​​the filling passage is larger than the cross-sectional area of ​​the ejection passage.

2. The bag-on valve according to claim 1, characterized in that the filling region of the joint member has an inner diameter larger than the diameter of the ball, and a support member is arranged in the filling region to support the ball on the central axis of the joint member.

3. The bag-on valve according to claim 1, characterized in that the ejection region of the joint member has an inner diameter smaller than the diameter of the ball, and one or more grooves are provided on the inner wall surface of the ejection region along the axial direction, and the portion of the inner wall surface of the ejection region of the joint member that does not have the grooves has an inclined surface that contacts the outer circumferential surface of the ball, and the space enclosed by the outer circumferential surface of the ball and the grooves constitutes the ejection passage.

4. The bag-on valve according to claim 2, characterized in that the support member includes at least one of a cylinder having a diameter smaller than the inner diameter of the filling area and a coil spring having a diameter smaller than the inner diameter of the filling area.

5. The bag-on valve according to claim 4, wherein the coil spring biases upward while supporting the ball located in the filling area.

6. The bag-on valve according to claim 4, wherein the support member has a cylinder with a diameter smaller than the inner diameter of the filling area, and a beam member is provided between the inner wall surface of the filling area of ​​the joint member and the cylinder to support the cylinder with respect to the inner wall surface of the filling area.

7. The bag-on valve according to claim 1, characterized in that the joint member includes a cylindrical bag joint fixed to the opening of the bag and a cylindrical housing inserted into the upper opening of the bag joint.

8. The bag-on valve according to claim 7, characterized in that the area for filling is provided in the bag joint, and the area for ejection is provided at the lower end of the housing.

9. The bag-on valve according to claim 1, wherein the stem has one or more through holes on its side surface, and further comprises a stem rubber covering the through holes on the side surface of the stem, and a mounting cup disposed on the stem rubber.

10. An aerosol container having a container and a bag-on valve attached to the opening of the container, wherein the bag-on valve is the bag-on valve described in any one of claims 1 to 9.

11. A cylindrical joint member provided at the opening of a bag of a bag-on-valve, comprising a ball movably disposed inside, wherein when filling the bag with contents through the internal space of the joint member, the ball is located in a predetermined filling area inside the joint member, forming a filling passage between the outer circumferential surface of the ball and the inner wall surface of the filling area of ​​the joint member, and when ejecting the contents of the bag to the outside through the internal space of the joint member, the ball is located in a predetermined ejection area inside the joint member that is further from the bag than the filling area, forming an ejection passage between the outer circumferential surface of the ball and the inner wall surface of the ejection area of ​​the joint member, and the structure of the filling area and ejection area of ​​the joint member is configured such that the cross-sectional area of ​​the filling passage is larger than the cross-sectional area of ​​the ejection passage.

12. An aerosol valve comprising: a cylindrical joint member; a ball movably disposed inside the joint member; and a stem connected to the upper part of the joint member and used for ejecting the contents of a container, wherein when filling the container with contents through the stem and the internal space of the joint member, the ball is located in a predetermined filling area inside the joint member, forming a filling passage between the outer surface of the ball and the inner wall surface of the joint member; when ejecting the contents of the container to the outside through the internal space of the joint member and the stem, the ball is located in a predetermined ejection area inside the joint member closer to the stem than the filling area, forming an ejection passage between the outer surface of the ball and the inner wall surface of the joint member; and the structure of the filling area and the ejection area of ​​the joint member is configured such that the cross-sectional area of ​​the filling passage is larger than the cross-sectional area of ​​the ejection passage.

13. An aerosol container having a container and a valve provided at the opening of the container, wherein the valve is the aerosol valve described in claim 12.

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