JP2011136747A - Inner bag and double aerosol product using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner bag preventing scatter of stock solution during the first discharge even when a filled content is not increased, and to provide a double aerosol product. <P>SOLUTION: In the inner bag 10 of the double aerosol product having a valve engagement part 15 in the vicinity of the upper end, the body 12 filled with the stock solution in the downward side, and a neck 14 between the engagement part and the body, the volume of the neck is decreased when a mounting cup of the valve is placed on the neck and is pressed down. The neck 14 includes a diameter-shrunk part 20 whose diameter gradually decreases upward from the upper end of the body, and a receiving seat 21 expanding outward from the upper end of the diameter-shrunk part to contact the outer circumference of the bottom surface of the valve. This double aerosal product keeps the inner bag 10 accommodated in the vessel body, the inner bag filled with the stock solution, the gap between the inner bag 10 and the vessel body filled with an propellant by an undercup filling method, and the inner bag 10 and the upper end opening of the vessel body clogged with the valve. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an inner bag used for a double aerosol product and a double aerosol product using the inner bag.

  The present applicant has disclosed a double aerosol product in which an inner bag made of a synthetic resin is accommodated in a bottomed cylindrical container body (see Patent Document 1). FIG. 12 of Patent Document 1 discloses a double aerosol product having a spout. And in FIG. 13, in order to hold | maintain a valve | bulb in a container main body, the container main body provided with the annular protrusion which protrudes inward somewhat from the upper end, and the mounting cup provided with the step part engaged with the annular protrusion, Is described. Further, the inner bag includes a step portion sandwiched between the annular protrusion of the container body and the step portion of the mounting cup, and below the step portion is a substantially cylindrical neck portion.

  FIG. 1 of Patent Document 1 includes a container body having a conical shoulder, a bead portion at the upper end of the shoulder portion, and an inner bag having a flange engaged with the bead portion at the upper end. Are listed. In this inner bag, the diameter of the neck is matched with the diameter of the opening of the container body, and the diameter of the trunk is determined to be somewhat smaller than the diameter of the container body. And between the neck part and the trunk part, a tapered shoulder part having substantially the same inclination as the shoulder part of the container body is provided.

  Patent Document 2 discloses an inner bag having a bellows between a body portion and a neck portion. This inner bag is used for a double aerosol product which is housed in a container body and ejects a foam of a two-component mixed hair dye. Patent Document 3 discloses that when the valve is clinched to the container body, the shoulder (receiving seat) of the inner bag is pushed down at the bottom of the mounting cup of the valve. However, in any case of Patent Documents 1 to 3, the neck portion is substantially cylindrical and does not shrink in the radial direction by being pushed down.

Japanese Patent No. 4194552 Japanese Patent No. 4354713 Special table 2009-530208

  When manufacturing a double aerosol product, the step of filling the inner bag with the stock solution leaves a space for inserting a valve at the upper end of the inner bag. Thereafter, when the valve is fitted into the upper end of the inner bag, most of the space is filled, but some space still remains. When a stock solution with high viscosity is used, a space is likely to remain between the inner bag and the stock solution, and the air in the space is compressed by the pressure of the propellant and mixed as bubbles in the stock solution, and the user first opens the valve. When discharged, the stock solution may blow out vigorously due to the energy accumulated in the bubbles and may be scattered around and contaminated.

  In order to prevent this problem, it is conceivable that the level of the stock solution filled in the inner bag is made as high as possible and the space to be left is made as small as possible. However, when the valve is fitted into the inner bag, the stock solution may be ejected, and the filling amount increases, which is uneconomical. An object of the present invention is to provide an inner bag and an aerosol product that can prevent the dispersion of the stock solution without increasing the filling amount of the stock solution.

  The inner bag of the double aerosol product of the present invention has a fitting part fitted to the outer peripheral surface of the mounting cup of the valve in the vicinity of the upper end, and has a barrel part filled with the stock solution below, the fitting part and the barrel. An inner bag of a double aerosol product having a neck part communicating between the parts, wherein a volume of the neck part is reduced when a valve mounting cup is placed on the neck part and pushed down. (Claim 1).

  In such an inner bag, the neck portion gradually decreases in diameter from the upper end of the body portion toward the upper side, and expands outward from the upper end of the reduced diameter portion, and the outer periphery of the bottom surface of the mounting cup of the valve. What comprises the receiving seat which contact | abuts is preferable (Claim 2). Preferably, a bellows that expands and contracts in the vertical direction is interposed between the upper end of the body portion and the lower end of the reduced diameter portion (Claim 3), and the upper end of the fitting portion extends straight upward. Alternatively, the flange may extend outward from the upper end of the fitting portion (claim 5). Further, the fitting portion may be smaller in diameter than the body portion, and the reduced diameter portion may also serve as a shoulder portion (Claim 6).

  The double aerosol product of the present invention is a bottomed cylindrical container body having an opening at the upper end, any of the inner bags accommodated in the container body, and a stock solution filled in the inner bag, A propellant filled between the container and the inner bag, and a valve for closing the upper end opening of the inner bag and the upper end opening of the container are provided (Claim 7).

  In the inner bag of the present invention (Claim 1), after the stock solution is filled, when the mounting cup of the valve is placed on the neck and pushed down, the volume of the neck decreases. Even when the space between the liquid surface and the mounting cup remains with the stock solution filled up to the neck, air in the space is discharged to the outside when the valve is pushed down, so that the stock solution can be prevented from scattering during use.

  In such an inner bag, when the neck portion is provided with a reduced diameter portion whose diameter is reduced upward (Claim 2), the space remaining when the stock solution is filled up to the neck portion and the valve is fitted is small. . Further, when the valve is pushed down to fit the outer peripheral surface of the mounting cup to the fitting portion of the inner bag, the outer periphery of the bottom surface of the mounting cup is engaged with the receiving seat of the inner bag, and the reduced diameter portion of the inner bag is The volume of the neck is reduced by being squeezed, and a gas such as air mixed in the stock solution can be moved upward and discharged to the outside of the inner bag. If the adhesion between the mounting cup and the inner bag fitting part is high and gas cannot be expected to escape through the gap, the stem can be fitted by fitting the outer peripheral surface of the mounting cup into the inner bag while pushing down the stem. Gas can escape through. Therefore, even if the amount of the stock solution to be filled is not increased, for example, it is not filled up to the vicinity of the fitting portion, the stock solution can be discharged smoothly without being scattered in the initial stage of use.

  Further, in the case where the bellows that expands and contracts in the vertical direction is interposed between the upper end of the body part and the lower end of the reduced diameter part (Claim 3), the volume of the inner bag is compressed when the valve is pushed down because of clinch. This makes it easier to escape bubbles. Moreover, what the upper end of the said fitting part is extended straight up can be used suitably for the container main body which does not have a bead (Claim 4). Moreover, what extended the flange outward from the upper end of the said fitting part (Claim 5) can be used suitably for the container main body provided with the bead part around the opening part. Furthermore, when the fitting portion is smaller in diameter than the body portion and the reduced diameter portion also serves as a shoulder portion (Claim 6), the volume of the inner bag is further compressed when the valve is clinched.

  Since the double aerosol product of the present invention is provided with the aforementioned inner bag, the contents are not scattered at the initial use without increasing the amount of the stock solution.

FIG. 1a is a partially cutaway front view showing an embodiment of the inner bag of the present invention, and FIG. 1b is an enlarged cross-sectional view of the main part of the inner bag. It is sectional drawing which shows the state before fitting the valve | bulb of the aerosol product provided with the inner bag of FIG. It is a principal part expanded sectional view which shows the state which fitted the valve | bulb to the inner bag of FIG. It is a principal part expanded sectional view which shows the procedure of fitting a valve | bulb to the inner bag of FIG. 1, and discharging the air remaining in the inner bag outside. It is sectional drawing which shows embodiment of the aerosol product provided with the inner bag of FIG. FIG. 6A is a cross-sectional view of the main part showing still another embodiment of the inner bag of the present invention together with the container body, and FIG. 6B is a cross-sectional view of the main part showing a state where the inner bag is crimped to the container main body together with the valve.

  An inner bag 10 shown in FIG. 1a includes a bottom 11 and a cylindrical trunk 12 rising from the periphery thereof, a bellows 13 continuous from the upper end of the trunk, a neck 14 extending upward from the top of the bellows, and a neck And a cylindrical valve fitting portion 15 that extends further upward from the upper end. A pinch-off portion 16 is formed on the bottom surface of the bottom portion 11. The body portion 12 is formed with a plurality of longitudinal grooves 17 that are recessed on the surface side and projecting on the inner surface side.

  As shown in FIG. 1b, the bellows 13 includes a truncated cone-shaped first inner inclined surface 18a extending inwardly from the upper end of the body 12, and an inverted frustoconical first outer surface extending inclinedly from the upper end. It consists of a slope 19a, a second inner slope 18b extending inwardly from the upper end thereof, and a second outer slope 19b extending obliquely outward from the upper end thereof. In the conventional inner bag, the neck portion is formed in a cylindrical shape that extends straight upward from the outer edge of the second outer slope 19b. In the inner bag 10, the neck portion has a diameter that gradually decreases toward the top. It is comprised from the part 20 and the receiving seat 21 extended outward from the upper end of the reduced diameter part.

  The receiving seat 21 is formed in a substantially arc shape in a longitudinal section according to the shape of the lower end outer peripheral corner of the mounting cup of the valve. And the diameter-expanded part 22 which expands gradually toward the upper side is continuing to the upper end of the receiving seat 21, and the above-mentioned valve fitting part 15 closely_contact | adhered to the outer peripheral surface of a mounting cup is continuing to the upper end. The upper end of the valve fitting part 15 is flat. Further, the inner bag 10 has a plurality (for example, 3) arranged in a ring shape (radially in a plan view), preferably at regular intervals, along the outer peripheral edge near the lower end of the neck portion 14, that is, near the lower end of the reduced diameter portion 20. ~ 8, especially 4) ribs 23 are provided. The rib 23 is a thin plate extending in the vertical direction (see the central rib 23 in FIG. 1a) and is substantially rectangular in a side view (see FIG. 1b). These ribs 23 can be simultaneously formed when the inner bag 10 is blow-molded.

  In this embodiment, the inclination angle of each inclined surface 18a, 19a, 18b, 19b of the bellows 13 is about 45 degrees. However, it can be set to about 30 to 60 degrees with respect to a horizontal plane (a plane perpendicular to the vertical axis). The outer diameter of the outermost portion of the bellows 13 is matched to the inner diameter of the container body (see reference numeral 25 in FIG. 2), and is usually somewhat smaller than the outer diameter of the body portion 12. The outer diameter of the valve fitting portion 15 is also smaller than the inner diameter of the body portion 12. However, the outer edge of the aforementioned rib 23 is set to abut against the inner surface of the container body 25 when the inner bag 10 is accommodated in the container body 25.

  The inclination angle of the reduced diameter portion 20 is usually about 35 to 80 degrees, preferably about 40 to 70 degrees with respect to the horizontal plane. That is, the reduced diameter portion 20 rises from the slope of the bellows 13. The inner diameter of the reduced diameter portion 20 near the upper end of the smallest diameter is substantially equal to the inner diameter of the bellows 13.

  Such an inner bag 20 is manufactured into a bottomed cylindrical bag body by blow molding from a thermoplastic resin similar to a conventional inner bag. However, it can also be manufactured by other manufacturing methods. Synthetic resins used are linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene Naphthalate (PEN), polyacrylonitrile (PAN), ethylene vinyl alcohol copolymer (EVOH), nylon (NY) and the like. These are used as a single layer or a laminate of two or more. Depending on the stock solution to be filled, it is preferable to provide a chemical barrier layer such as polyethylene having excellent chemical resistance and a gas barrier layer such as ethylene vinyl alcohol copolymer and nylon having excellent gas barrier properties. The thickness of the inner bag 10 may be the same as that of a conventional inner bag, and is about 0.1 to 1 mm, preferably about 0.2 to 0.8 mm.

  The inner bag 10 configured as described above is accommodated in the container body 25 as shown in FIG. At that time, the ribs 23 come into contact with the inner surface of the container body 25, so that the inner bag 10 is stabilized. Then, the stock solution is filled into the inner bag 10 up to the reduced diameter portion 20 of the neck portion 14 (see FIG. 4). When the inner bag 10 is accommodated in the container main body 25, the valve 26 is further placed on the valve fitting portion 15 at the upper end of the inner bag 10 and pushed down (see FIGS. 3 and 4). Thereafter, the propellant is filled in the space S between the inner bag 10 and the container body 25 by a known under cup filling method, and finally the valve 26 is fixed to the container body 25 (see FIG. 5). .

  As the container body 25, a metal bottomed cylindrical shape is used. For example, aluminum squeezed iron cans (DI cans), impact molded cans, tin cans, and the like are used. The container body 25 has a bottom portion 27, a cylindrical body portion 28 rising from the periphery of the bottom portion, a shoulder portion 29 extending upward while reducing the diameter from the upper end of the body portion, and a substantially cylindrical shape extending further upward from the upper end of the shoulder portion. It consists of a neck 30. In the middle of the neck portion 30, an annular protrusion 31 protruding inward for locking the valve 26 is provided.

  The upper end of the neck 30 is flat because it abuts on the gasket. In this embodiment, the height of the container main body 25 is such that when the inner bag 10 is accommodated, the vicinity of the upper end of the inner bag 10 (for example, from the fitting portion 15 to the enlarged diameter portion 22 and further to the receiving seat 21). It protrudes somewhat from the top edge. When the inner bag 10 is accommodated in the container body 25, the inner bag 10 stands at the thin pinch-off portion 16 and is unstable. For this reason, the lower end of the neck portion of the inner bag 10 is brought into contact with the annular protrusion 31 of the container body 25. It is preferable to support it. For example, as shown in FIG. 1 b, a plurality of ribs 23 are provided on the outer periphery of the lower end of the reduced diameter portion 20 of the neck portion 14, and the ribs 23 are brought into contact with the inner surface of the annular protrusion 31 of the container body 25. The position of the inner bag can be stabilized while ensuring a gap for filling the agent. As a result, the propellant can be easily filled and the liquid level is stabilized, so that the effect of exhausting air is enhanced.

  The valve 26 holds a cylindrical housing 32, a stem 33 whose lower part is accommodated in the housing so as to be movable up and down, a spring that constantly biases the stem upward, a housing 32, and a container body 25 and The mounting cup 34 also functions as a lid for the inner bag 10, a cover 35 provided on the upper surface of the mounting cup, and an annular gasket 36 provided on the outer periphery of the mounting cup 34. As shown in FIG. 3, the mounting cup 34 includes an inverted cup-shaped housing holding portion 37, an outer peripheral portion 39 provided via an annular deep groove 38 between the housing holding portion, and a flange at the upper end of the outer peripheral portion. 40. The deep groove 38 is provided in order to obtain elasticity when the housing is fitted, and further in order to enhance the sealing performance when the outer peripheral portion 39 is bent and the valve is attached.

  A corner portion 41 at the lower end of the outer peripheral portion 39 is formed in an arc shape in cross section and continues to the bottom surface 42. The arc-shaped corner portion 41 is a portion where the receiving seat 21 of the inner bag 10 abuts. An annular protrusion 43 having a cylindrical surface (outer peripheral surface) into which the valve fitting portion 15 of the inner bag 10 is closely fitted is formed on the outer peripheral portion 39. The corner 44 at the lower end of the annular protrusion 43 bites into the inner surface of the inner bag 10 when the valve is attached, thereby enhancing the sealing performance.

  As shown in the stock solution filling step S1 at the left end of FIG. 4, the stock solution G is filled until the height of the liquid surface P reaches the reduced diameter portion 20 of the inner bag. Even in this case, since the receiving seat 21 and the valve fitting portion 15 are provided, the liquid level P is below the upper end of the inner bag 10, and there is little possibility that the stock solution will be spilled even when the container body 25 is conveyed by a conveyor or the like.

  In the valve mounting step S2 in which the valve 26 is fitted to the upper end of the inner bag 10, the valve 26 is pushed down after being placed on the inner bag 10. At this time, the receiving seat 21 of the inner bag 10 is mounted on the mounting cup 34. The reduced diameter portion 20 is pushed down so that the angle with respect to the horizontal plane becomes smaller. Since the diameter-reduced portion 20 is inclined so as to be reduced in diameter, when the upper end is pushed down, the reduced-diameter portion 20 tends to inwardly center around the lower end. Therefore, the volume of the neck 14 of the inner bag 10 is reduced, and the stock solution G is pressurized. Therefore, the air mixed in the stock solution rises and goes out to the space R between the lower surface of the mounting cup 34 and the liquid surface P. As the liquid level P rises, the air in the space R escapes to the outside between the mounting cup 34 and the inner bag 10 or through the stem hole. Thereby, the air remaining in the inner bag 10 can be greatly reduced. When the outer peripheral surface of the mounting cup 34 is airtightly fitted to the valve fitting surface 15 of the inner bag 10, the air in the space R can be discharged by pushing down the valve 26 while pushing down the stem. Air hardly enters from the outside after the event.

  Next, the outer periphery of the valve and the shoulder of the container main body are sealed, and the propellant is filled from between the upper portion of the inner bag 10 and the upper end of the container main body 25 by a known undercup filling method. As the propellant, compressed gas such as nitrogen, carbon dioxide and air, liquefied petroleum gas and liquefied gas such as dimethyl ether are used.

  After filling the propellant, the valve 26 is pushed down again to fix the valve 26 to the container body 25 (valve fixing step S3). In this state, the lower end of the cover 35 is pressed inward by a plurality of crimp claws to be plastically deformed, and is strongly engaged with the groove 31a on the outer surface side of the annular protrusion 31 of the neck portion of the container body 25. As a result, the cover 35 is fixed to the container body 25 and the airtightness of the container body 25 is maintained by the action of the gasket 36. At this time, the valve fitting portion 15 of the inner bag 10 is strongly sandwiched between the lower end corner portion 44 of the annular protrusion 43 of the mounting cup 34 and the neck portion of the container body 25, and a sealing action is given.

  As shown in FIG. 5, the double aerosol product in which the filling of the stock solution and the propellant and the fixing of the valve 26 are completed as described above is performed by attaching an injection member 45 suitable for the stock solution to the upper part of the container body 25. Double aerosol product 46. In this embodiment, the injection member 45 includes a bottomed cylindrical shoulder cover 47 that is elastically attached to the groove 31a (see FIG. 2) outside the annular protrusion of the container body 25, and a resin hinge with respect to the shoulder cover. And an operating lever 49 that protrudes laterally from the base of the spout and swings the spout. The spout 48 communicates with the inside of the stem 33 of the valve 26. In addition, the code | symbol 50 of FIG. 5 is an overcap.

  Although the stock solution with which the inner bag 10 is filled is not particularly limited, for example, stock solutions for various uses such as pharmaceuticals, quasi drugs, cosmetics, and miscellaneous goods can be filled. Examples of the pharmaceuticals include anti-inflammatory analgesics, nasal drops, eye drops, wounds, and the like, and quasi-drugs include hair dyes, mouth fresheners, anti-odor agents, antiperspirants, hair restorers, permanent waves. Agents, bath preparations, medicated cosmetics, medicated toothpastes, repellents, insecticides and the like. Cosmetics include hair creams, hair sprays, hair foams, hair tonics, hair dyes and other hair, after-shave lotions, general cosmetics, eau de cologne, sun lotion and other lotions, cleansing creams, shaving creams, milky lotions, Examples thereof include creams such as cold cream and hand cream, cosmetic oils such as baby oil, and cosmetics for packs. As miscellaneous goods, household goods such as industrial goods, car goods, deodorants and glass cleaners can be mentioned. In particular, like a two-component hair dye, two aerosol products can be connected and used suitably for a two-component discharge type aerosol product that discharges two types of stock solutions simultaneously.

  The pressure of the product is preferably 0.3 to 1.0 MPa (35 ° C.) when a compressed gas is used as a propellant and 0.8 MPa (35 ° C.) or less when a liquefied gas is used. The properties of the stock solution are not particularly limited to liquids, creams, pastes, gels, and foams. However, since the properties of the present invention can be particularly utilized, a stock solution having a creamy, pasty, or gel-like viscosity should be used. Is preferred. In addition, a stock solution that easily corrodes the metal when it comes into contact with the metal, such as a hair dye, can be suitably used.

  Since the double aerosol product 46 is assembled using the inner bag 10 described above, almost no air remains in the inner bag 10. Further, no bubbles are mixed in the stock solution in the inner bag 10. Therefore, when the consumer first presses the operating lever 49 to discharge the stock solution, the bubbles do not expand rapidly and the stock solution does not scatter. Further, it is possible to stably store a two-component hair dye that is oxidized by air (oxygen) and whose effect tends to be lowered for a long period of time.

  A double aerosol product 52 shown in FIGS. 6a and 6b includes a shoulder portion 54 that extends while being reduced in diameter from the upper portion of the trunk portion 53, and a bead portion that is curled outward at the upper end of the shoulder portion. A container body 56 having 55 is employed. The inner bag 57 includes a substantially cylindrical barrel portion 58, a reduced diameter portion 59 extending from the upper end of the barrel portion to the upper side, and a receiving seat that extends somewhat outward from the upper end of the reduced diameter portion. 60, a cylindrical valve fitting portion 61 extending upward from the outer edge of the receiving seat, and a flange 62 extending outward from the upper end of the valve fitting portion. The inner bag 57 has no bellows. However, a bellows may be provided.

  Further, the valve 64 used in the double aerosol product 52 includes a valve main body 65 and a mounting cup 66 for attaching the valve main body to the container main body 56. The mounting cup 66 includes a covering portion 67 having a substantially semicircular cross section that covers the bead portion 55, an outer peripheral wall 68 that is fitted to the inner surface side of the bead portion 55, and a housing holding portion 69 that holds the valve body 65. The housing holding portion 69 and the bottom portion 70 that connects the outer peripheral wall 68 are provided. The mounting cup 66 is a known one made of a thin metal plate such as aluminum.

  In the double aerosol product 52, the filling of the stock solution into the inner bag 57 and the under cup filling of the propellant into the gap between the inner bag 57 and the container body 56 are performed in the same manner as before. When the valve 64 is attached to the container body 56 after the stock solution is filled, the outer peripheral wall 68 of the mounting cup 66 is fitted into the valve fitting portion 61 of the inner bag 57 as shown in FIG. As a result, the bottom portion 70 of the valve 64 comes into contact with the receiving seat 60 of the inner bag 57 and is pushed down while deforming the reduced diameter portion 59. At this time, the air inside the inner bag 57 escapes to the outside from the gap or stem hole between the inner bag 57 and the mounting cup 66. When the fitting portion 61 of the inner bag 57 and the outer peripheral wall 68 of the mounting cup 66 are in close contact with each other, it is difficult for air to escape, so that the air in the inner bag 57 is communicated with the outside by pushing down the stem of the valve 64. The valve 64 may be mounted while securing the escape path.

  After that, a propellant is filled with an under cup from between the flange 62 of the inner bag and the bead portion 55, and then the outer peripheral wall 68 of the mounting cup 66 is clinched so as to expand outward, and pressed against the inner surface of the shoulder portion 54 of the container body. Thus, the attachment of the valve 58 and the sealing of the container body 56 are completed. The double aerosol product 52 is also provided with an injection member similar to the injection member 45 shown in FIG. 5 to become a final product, and the dispersion of the stock solution during the first discharge is prevented.

  In the inner bag 10 of FIG. 1, the bellows 13 is interposed between the neck portion 14 and the trunk portion 12, but the bellows can be omitted. Moreover, in the double aerosol product 46 of FIG. 5, although the spout 48 and the shoulder cover 47 are united, it can also be set as another component. Further, instead of the spout 48, a spray nozzle can also be employed.

10 Inner bag 11 Bottom (inner bag)
12 trunk 13 bellows 14 neck 15 valve fitting part 16 pinch-off part 17 groove 18a first inner slope 18b second inner slope 19a first outer slope 19b second outer slope 20 reduced diameter part 21 seat 22 enlarged part 23 rib 25 Container body 26 Valve S Space 27 between the inner bag and the container body 27 Bottom (container body)
28 trunk 29 shoulder 30 neck 31 annular protrusion (container body)
32 Housing 33 Stem 34 Mounting cup 35 Cover 36 Gasket 37 Housing holding part 38 Deep groove 39 Outer part 40 Flange 41 Corner part 42 Bottom face (mounting cup)
43 Annular projection (mounting cup)
44 Corner S1 Stock Solution Filling Process G Stock Solution P Liquid Level S2 Valve Mounting Process S3 Valve Fixing Process 45 Injection Member 46 Double Aerosol Product 47 Shoulder Cover 48 Spout 49 Operation Lever 50 Overcap 52 Double Aerosol Product 53 Body 54 Shoulder 55 Bead part 56 Container body 57 Inner bag 58 Body part 59 Reduced diameter part 60 Seat 61 Valve fitting part 62 Flange 64 Valve 65 Valve body 66 Mounting cup 67 Covering part 68 Outer wall 69 Housing holding part 70 Bottom part (mounting cup)

Claims (7)

A fitting portion that fits with the outer peripheral surface of the mounting cup of the valve is provided in the vicinity of the upper end, a barrel portion that is filled with a stock solution is provided below, and a neck portion that communicates them is provided between the fitting portion and the barrel portion. A double aerosol product inner bag,
An inner bag of a double aerosol product in which the volume of the neck decreases when a valve mounting cup is placed on the neck and pushed down.   The neck portion includes a reduced diameter portion that gradually decreases in diameter from the upper end of the body portion, and a receiving seat that extends outward from the upper end of the reduced diameter portion and contacts the outer periphery of the bottom surface of the mounting cup of the valve. The inner bag of the double aerosol product according to claim 1.   The inner bag according to claim 1, wherein a bellows extending in the vertical direction is interposed between an upper end of the body portion and a lower end of the reduced diameter portion.   The inner bag according to any one of claims 1 to 3, wherein an upper end of the fitting portion extends straight upward.   The inner bag according to any one of claims 1 to 3, wherein a flange extends outward from an upper end of the fitting portion.   The inner bag according to any one of claims 1 to 5, wherein the fitting portion is smaller in diameter than the body portion, and the reduced diameter portion also serves as a shoulder portion.   A bottomed cylindrical container main body having an opening at the upper end, the inner bag according to any one of claims 1 to 6 accommodated in the container main body, the undiluted solution filled in the inner bag, and the container A double aerosol product comprising: a propellant filled between the inner bag and the inner bag; and a valve for closing the upper end opening of the inner bag and the upper end opening of the container.

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