JP6684072B2 - Method for manufacturing multiple container and discharge product - Google Patents

Description

  The present invention relates to a multiple container for a discharge product containing a stock solution between an outer container and an inner container, and a method for manufacturing a discharge product using the same.

  The applicant has an outer bottle made of synthetic resin and an inner bottle made of synthetic resin, stores the stock solution in the stock solution storage chamber between the outer bottle and the inner bottle, and stores the pressurizing agent in the inner bottle. , A multilayer bottle product that discharges the stock solution while expanding the inner bottle toward the inner surface of the outer bottle (Patent Document 1). In this multi-layer bottle product, the inner bottle is spread so as to contact the inner surface of the outer bottle, so that the remaining amount of the undiluted solution can be reduced.

On the other hand, there is known a double structure type aerosol container including a pressure-resistant container made of synthetic resin, a retractable internal container to be inserted therein, and a valve for closing their openings. Further, Patent Document 2 discloses a method for manufacturing an aerosol product in which such a double structure type aerosol container is filled with a pressurizing agent and a chemical solution. Specifically, the space between the pressure-resistant container of the aerosol container and the inner container is filled with a pressurizing agent, and the inside of the sealed aerosol container is sterilized, and then, the aerosol product is filled with the drug solution from the valve into the inner container. A manufacturing method is disclosed. Note that Patent Document 2 describes that the chemical solution filling process may be performed in another factory or even in another manufacturer.
Further, Patent Document 3 includes an outer container, an inner container, a valve assembly, and a pressurizing agent filled between the outer container and the inner container, and is pressurized for an aerosol product. A container is disclosed. Then, Patent Document 4 discloses a method for manufacturing an aerosol product using the container of Patent Document 3. Specifically, a step of providing a pressurized container filled with a propellant (pressurizing agent) at the first position, a step of transferring the pressurized container to a second position, and a stock solution in an internal container at the second position. And a filling step.

Japanese Patent No. 5487011 Japanese Patent No. 4307911 Special table 2014-513656 gazette Japanese Patent Publication No. 2014-513655

As described above, Patent Documents 2 to 4 disclose an intermediate product in which the stock solution is not filled and only the pressurizing agent is filled. However, in this case, since the pressurizing agent is filled between the outer container and the inner container, if the outer container is made of synthetic resin, the pressurizing agent permeates with time and is released to the outside. There is. As a result, the pressure drops during transportation and storage, and an aerosol product whose pressure after filling with the undiluted solution is lower than a set value is manufactured.
In view of the above problems, the present invention provides a double container for containing a stock solution between an outer container and an inner container in which the loss of a filled pressurizing agent is small, and a method for producing a discharge product using the same. Is intended.

A multiple container for a discharge product containing a stock solution in a stock solution storage chamber between an outer container and an inner container of the present invention is a synthetic resin outer container and a flexible synthetic resin housed in the outer container. And a valve attached to the outer container to close the outer container and the inner container, and a pressurizing agent contained in the inner container.
It is preferable that such a multi-container has a pressurizing agent and / or compressed air stored in the stock solution storage chamber.

The manufacturing method of a discharge product of the present invention is an outer container made of synthetic resin, an inner container made of synthetic resin having flexibility and attached to the outer container, and attached to the outer container to close the outer container and the inner container. Prepare a multiple container provided with a valve and a pressurizing agent contained in the internal container,
The multi-container is transferred, and the stock solution is pressure-filled in the stock solution storage chamber between the outer container and the inner container of the multi-container.
In the method for manufacturing a discharge product according to the present invention, the multiple container is configured such that after the valve is attached to an outer container, a pressure agent is filled into the inner container from the valve to compress a sealed stock solution storage chamber. Is preferably prepared by
In the method for manufacturing a discharge product according to the present invention, the multiple container is prepared by mounting the valve on an outer container and then filling a pressure agent into the inner container and the stock solution storage chamber through the valve. Is preferred.
In the method for producing a discharge product according to the present invention, the multiple container is prepared by filling a pressure agent into the inner container or the inner container and a stock solution storage chamber, and attaching the valve to an outer container. Is preferred.
In the method for manufacturing a discharge product of the present invention, it is preferable that after the transfer, the pressurizing agent and / or the compressed air in the stock solution storage chamber is discharged, and the stock solution is pressure-filled in the stock solution storage chamber.

A multiple container for a discharge product containing a stock solution in a stock solution storage chamber between an outer container and an inner container of the present invention is a synthetic resin outer container and a flexible synthetic resin housed in the outer container. Made of an internal container, a valve attached to the external container to close the external container and the internal container, and a pressurizing agent filled in the internal container. Since it is covered with the space between the container and the inner container (stock solution storage chamber) and further with the outer container, the permeation of the pressurizing agent can be prevented, and the quality can be maintained even after long-term storage. Specifically, even if the pressurizing agent permeates the internal container and reaches the stock solution storage chamber, the stock solution storage chamber is sealed. Therefore, the pressure in the stock solution storage chamber increases by the amount of the permeation, and the pressure increases from the inside container to the stock solution storage chamber. Is difficult to penetrate. Therefore, the pressure drop is small even after long-term storage. Therefore, it is possible to produce a high-quality discharge product even if the product is transferred from a plant for filling a pressurizing agent for producing the multiple container of the present invention to another plant for pressurizing and filling a stock solution of food, medicine, cosmetics and the like.
In the multiple container of the present invention, when the pressurizing agent and / or the compressed air is stored in the stock solution storage chamber, the pressurizing agent and the compressed air in the stock solution storage chamber are the inner container and the outer container. Therefore, the permeation of the pressurizing agent from the inner container to the stock solution storage chamber can be further suppressed.

The manufacturing method of a discharge product of the present invention is an outer container made of synthetic resin, an inner container made of synthetic resin having flexibility and attached to the outer container, and attached to the outer container to close the outer container and the inner container. A multiple container provided with a valve and a pressurizing agent accommodated in the inner container is prepared, the multiple container is transferred, and the undiluted solution is pressurized in the undiluted solution storage chamber between the outer container and the inner container of the multiple container. Since it is filled, it suppresses the permeation of the pressurizing agent during the transfer of multiple containers or during storage until filling the undiluted solution, stabilizing the pressure before and after undiluting the undiluted solution, and reducing the variation in the injection state depending on the pressure. Therefore, it is possible to produce a high-quality discharge product. Further, the transfer weight can be reduced to reduce the consumption of energy required for the transfer.
A method for manufacturing a discharge product according to the present invention, wherein after the valve is attached to an outer container, a pressurizing agent is filled into the inner container from the valve, and a sealed stock solution storage chamber is compressed to form a multiple container. When preparing, the internal pressure can be applied to the stock solution storage chambers of the multiple containers, and the permeation of the pressurizing agent from the inside of the internal container can be further suppressed.
A method for manufacturing a discharge product according to the present invention, wherein after the valve is attached to an external container, a multiple container is prepared by filling a pressure agent into the inner container and the stock solution storage chamber through the valve, Since the internal pressure can be applied to the stock solution storage chamber of the container to reduce the concentration difference of the pressurizing agent, the permeation of the pressurizing agent from the inside of the internal container can be further suppressed.
In the method for manufacturing a discharge product of the present invention, when a multi-container is prepared by filling a pressure agent into the inner container and the stock solution storage chamber and attaching the valve to an outer container, filling with a pressure agent is performed. The time can be shortened, the internal pressure is applied to the stock solution storage chambers of the multiple containers, and the concentration difference of the pressurizing agent can be reduced, so that the permeation of the pressurizing agent from the inner container can be further suppressed. .
In the method for manufacturing a discharge product according to the present invention, after the transfer, the stock solution containing chamber is evacuated, and when the stock solution is charged under pressure, the pressurizing agent and / or the stock solution contained in the stock solution containing chamber is used. By discharging the compressed air, it is easy to fill the stock solution into the stock solution in a liquid-tight state, and it is possible to produce a high-quality discharged product.

1a is a side sectional view showing an embodiment of the double container of the present invention, and FIG. 1b is a sectional view taken along line XX thereof. 2a is a side sectional view of an outer container of the double container of FIG. 1, and FIG. 2b is a sectional view taken along line YY thereof. 3a is a side sectional view of the inner container of the double container of FIG. 1, FIG. 3b is a sectional view taken along line Z1-Z1 thereof, and FIG. 3c is a sectional view thereof taken along line Z2-Z2. FIG. 4a is a side sectional view showing the valve assembly of the double container of FIG. 1, and FIG. 4b is a side sectional view showing its use state. 5a is a side sectional view of the empty container of FIG. 1, FIG. 5b is a sectional view taken along line X1-X1 thereof, FIG. 5c is a schematic view showing a manufacturing process of the double container of FIG. 1, and FIG. It is the X2-X2 sectional view taken on the line, FIG. 5e, FIG. 5g is a schematic diagram which shows the manufacturing process of a discharge product, FIG. 5f is the X3-X3 sectional view taken on the line of FIG. 5e, and FIG. 5h is X4 of FIG. 5g. It is a -X4 sectional view. FIG. 6a is a side sectional view showing a discharge product using the double container of FIG. 1, FIG. 6b is a sectional view taken along the line VV, and FIG. 6c is a sectional view showing a state immediately before use completion. FIG. 7a is a side sectional view showing a discharge product using another embodiment of the double container of the present invention, FIG. 7b is a sectional view taken along the line WW, and FIG. 7c shows a state immediately before the completion of its use. It is sectional drawing shown. It is a side sectional view showing other embodiments of a double container of the present invention.

The multiple container (double container) 10 of FIG. 1a is attached to the outer container 11 made of synthetic resin, the flexible inner container 12 made of synthetic resin housed in the outer container 11, and the outer container 11. A valve assembly 13 for closing the outer container 11 and the inner container 12 and a pressurizing agent P filled in the inner container 12 (pressurizing agent storage chamber S1) are provided. Further, the double container 10 is provided with a cap 14 so as to cover the valve assembly 13.
As shown in FIG. 6 a, this double container 10 is a container for a discharge product in which a stock solution C is stored in a cylindrical stock solution storage chamber S 2 between an outer container 11 and an inner container 12. The discharged product 10A is obtained by filling the stock solution C into the stock solution storage chamber S2.

  As shown in FIG. 2, the outer container 11 includes a bottom portion 11a, a cylindrical body portion 11b, a tapered shoulder portion 11c whose diameter decreases upward from the upper end of the body portion, and an upper end of the shoulder portion. And a cylindrical neck portion 11d extending upward from the container. Further, the outer container 11 is formed with a plurality of ribs 16 extending vertically from the shoulder portion 11c toward the body portion 11b.

  The bottom portion 11a has a hemispherical shape continuous from the lower end of the body portion 11b. In particular, the inner surface of the bottom portion 11a is a curved surface that is continuous from the lower end of the body portion 11b. However, the shape of the bottom portion 11a is not particularly limited, such as a petaloid provided with a plurality of legs so as to be self-supporting.

The body portion 11b is configured such that the outer container 11 can be expanded and deformed at a predetermined internal pressure within a range not exceeding the elastic limit. As shown in FIG. 2b, as the internal pressure becomes 0 (gauge pressure) to a predetermined internal pressure, the outer container 11 is deformed from the original state (solid line in FIG. 2b) to the expanded state (broken line in FIG. 2b). To do. The outer container 11 in FIG. 1 shows an expanded state in which it is expanded by the pressure of the pressurizing agent P. Therefore, it is possible to confirm whether or not the inner pressure is provided by the outer diameter (size) of the body portion 11b. Further, in the shipping inspection at the time of transferring the double container 10 and the receiving inspection of the transferred double container 10, it is checked whether the pressurizing agent is filled by checking the outer diameter of the body portion 11b. Can be determined.
The body portion 11b of the outer container 11 is preferably one that expands and deforms when the internal pressure is 0.1 MPa (gauge pressure) or more. Then, for example, when the outer container 11 is molded from a synthetic resin such as polyethylene terephthalate and nylon, it is preferable that the body portion 11b has a wall thickness of 0.20 to 0.6 mm, particularly 0.25 to 0.5 mm. By reducing the wall thickness in this way, the material can be saved and the weight can be reduced. The shoulder portion 11c may also be elastically deformed similarly to the body portion 11b.
However, the hardness of the body portion 11b is not particularly limited, and the body portion 11b may not be deformed by the internal pressure of the external container.

  The neck portion 11d is thicker than the body portion 11b, and is hard enough not to expand and deform when the internal pressure is 1.5 MPa (gauge pressure) or less. A screw portion 11d1 for fixing the valve assembly 13 is formed on the outer periphery of the neck portion 11d. An outer seal holding portion 11d2 for holding an outer sealing material 18 (see FIG. 1) that seals between the outer container 11 and the valve assembly 13 is formed below the screw portion 11d1. The outer seal holding portion 11d2 may be provided above the screw portion 11d1. Further, below the screw portion 11d1 and the outer seal holding portion 11d2, there is formed an annular flange 11d3 for holding the outer container 11 when assembling the discharge container 10 or suspending the outer container 11 when the stock solution C is filled. There is.

The rib 16 constitutes a convex portion 16a on the inner surface of the body portion 11b and the shoulder portion 11c of the outer container 11 and a groove portion 16b on the outer surface of the body portion 11b and the shoulder portion 11c of the outer container 11 (see FIG. 2b). In this embodiment, eight ribs 16 are annularly provided at equal intervals.
The rib 16 deforms as the body portion 11b expands. Specifically, in the original state, the groove 16b of the outer container 11 is deep and clearly visible. On the other hand, in the expanded state, the groove portion 16b is flattened so as to be shallow. That is, not only the outer diameter as described above but also the appearance are different between the original state and the expanded state, and the contour of the groove 16b becomes thin in the expanded state. Therefore, it is possible to easily recognize when the pressurizing agent P is filled and after the pressurizing agent P is discharged by visually observing the external container 11.
Further, the rib 16 strengthens the outer container 11 in the vertical direction, so that even if the body portion 11b of the outer container 11 is thinned as described above, the valve assembly 13 at the time of assembly is pressed against the outer container 11 when it is attached. Deformation such as bending can be prevented. Moreover, when the inner container 12 is expanded to the vicinity of the inner surface of the outer container 11 by discharging the stock solution C in the discharged product 10A, the convex portion 16a on the inner surface is vertically moved between the outer container 11 and the inner container 12 described later. A gap passage 25 is formed which extends and passes the stock solution C from the stock solution storage chamber S2 to the valve assembly 13 (see FIG. 6c).
It is preferable that a plurality of ribs 16 are annularly arranged at equal intervals. Particularly, it is preferable to provide 4 to 16 ribs 16. However, the rib 16 may be one, and the rib 16 may not be provided. Further, the cross-sectional shape of the rib 16 is such that two surfaces intersect with each other at an acute angle, but the shape is not particularly limited as long as a gap can be secured, and for example, it is composed of three or more (plural) surfaces. It may have a shape or a curved surface.

As shown in FIG. 3, the inner container 12 includes a bottom portion 12a, a cylindrical body portion 12b, a tapered shoulder portion 12c whose diameter decreases upward from the upper end of the body portion, and an upper end of the shoulder portion. And a cylindrical neck portion 12d extending upward from the flexible container. A flange portion 12d1 protruding outward is formed at the upper end of the neck portion 12d. From the lower surface of the flange 12d1 to the outer surface of the upper end of the shoulder 12c via the outer surface of the neck 12d, a plurality of vertically extending vertical passage grooves 12P are annularly arranged at equal intervals. A plurality of vertically extending recesses 17 are formed at equal intervals on the outer surface of the shoulder portion 12c to the body portion 12c.
The bottom portion 12a, the body portion 12b, and the shoulder portion 12c of the inner container 12 have flexibility, and the neck portion 12d has hardness. The inner sealing material 19 held by the valve assembly 13 is in contact with the inner surface of the hard neck portion 12d of the inner container 12 (see FIG. 1).
The inner container 12 is inserted coaxially with the outer container 11 such that the flange portion 12d1 is arranged at the upper end opening of the outer container 11 (see FIG. 1a). When the inner container 12 is filled with the pressurizing agent P, the inner container 12 expands toward the inner surface of the outer container 11 due to the pressure of the pressurizing agent P, and an air layer compressed between the inner container 12 and the inner surface of the outer container 11. A (stock solution storage chamber S2) is formed (see FIG. 1b). The neck 12d of the inner container 12 has the same shape as the inner surface of the neck 11d of the outer container 11.

  The vertical passage groove 12P is a part of a stock solution passage for the stock solution C that connects the stock solution storage chamber S2 of the discharge product 10A and the valve assembly 13 (atmosphere). And, it communicates with a clearance passage 25 (see FIG. 6c) described later. The vertical passage groove 12P may be provided on the inner surface of the neck portion 11d of the outer container 11, or may be provided on both the inner surface of the neck portion 11b of the outer container 11 and the outer surface of the neck portion 12b of the inner container 12. May be. At least a passage that connects the stock solution storage chamber S2 and the outside air (the valve assembly 13) may be formed. The vertical passage groove 12P is formed wide, and in the area extending radially outward from the groove bottom 12P1 of the one vertical passage groove 12P in plan view, the upper end of the convex portion 16a of the outer container 11 and the upper end of the concave portion 17 of the inner container 12 are formed. It is preferable to provide a plurality of them. As shown in FIG. 3c, the inner container 12 includes one convex portion 16 and two concave portions 17 in one area in a plan view. By including the plurality of upper ends of the convex portion 16a and the concave portion 17 in the area as described above, the gap passage and the vertical passage groove 12P can be surely communicated with each other just before the stock solution C is exhausted. Further, by arranging the convex portions 16a and the concave portions 17 in the same manner with respect to the plurality of vertical passage grooves 12P arranged annularly, the stock solution C can be evenly supplied from the stock solution storage chamber S2 to the valve assembly 13. Therefore, the inner container 12 can be expanded with a stable shape.

The recesses 17 are arranged at the same angle so as to overlap the projections 16a of the ribs 16 of the outer container 11 when the inner container 12 is expanded and deformed toward the outer container 11 (see FIG. 1b). The recess 17 also exerts an effect as a rib of the inner container 12, and prevents the inner container 12 from forming a polygonal line (horizontal polygonal line) that is substantially perpendicular to the recess 17. That is, when the inner container 12 is contracted or expanded, it is prevented that the inner container 12 is vertically folded into two pieces. Further, the concave portion 17 also acts as a polygonal line extending vertically when the stock solution C is filled and the inner container 12 is contracted during the manufacture of the discharge product 10A. Therefore, as the discharged product 10A, the undiluted solution storage chamber S2 is vertically divided and the undiluted solution C is unlikely to be isolated, and the undiluted solution C is easily ejected to the end. 5G and 5H, the contracted shape of the inner container 12 is described regularly, but it is only an outline and the contracted shape is not limited.
In this embodiment, the number of the recesses 17 is the same as the number of the ribs 16 of the outer container 11, and the recesses 17 are provided at equal intervals. However, the recess 17 may be one. Further, the numbers of the ribs 16 and the recesses 17 may be different. The cross-sectional shape of the recess 17 is a shape in which two surfaces intersect at an acute angle, but the shape is not particularly limited as long as a gap can be secured with the external container 11, and from three or more (plural) surfaces. It may have a configured shape or a curved surface. The recess 17 may be formed only on the outer surface.

Examples of the material of the inner container 12 include synthetic resins such as polyethylene terephthalate, polyethylene and polypropylene.
The combination of materials of the outer container 11 and the inner container 12 can be appropriately selected according to the application.

As shown in FIG. 4a, the valve assembly 13 includes a valve internal stock solution passage 13a that connects the stock solution storage chamber (S2 in FIG. 6) to the outside, an internal container (pressurizing agent storage chamber S1 in FIG. 6) and the outside. And a valve mechanism 21 for communicating / blocking the valve stock solution passage 13a and the valve pressurizing agent passage 13b, a valve holder 22 for holding the valve mechanism 21, and It is a lid provided with a cover cap 23 fixed to the outer container 11. The stock solution passage 13a in the valve communicates with the stock solution storage chamber S1 through the vertical passage groove 12P. However, the structure of the valve assembly 13 is not particularly limited as long as it has at least a valve internal stock solution passage communicating with the vertical passage groove 12P and a valve mechanism connecting / disconnecting the valve internal stock solution passage. In this embodiment, the valve assembly 13 is detachably fixed to the outer container 11. The cover cap 23 may be integrated with the external container by ultrasonic welding or the like.
As shown in FIG. 4b, the valve mechanism 21 includes two independent passages, that is, the first stem internal passage 26a (a part of the valve raw material liquid passage 13a) to the second stem internal passage 26b (the valve internal pressurizing agent passage 13b). (A part of) is formed. The stem 26 is always urged upward, and by pushing down the stem 26, the two passages in the valve communicate with each other. In the discharge product 10A, as shown in FIG. 6a, a push button 15 that connects the first intra-stem passage 26a and blocks the second intra-stem passage 26b is attached to the stem 26 for use. However, two stems may be used to connect / disconnect the stock solution passage in the valve and the pressurizing agent passage in the valve.
The valve holder 22 includes a flange portion 22a arranged on the flange portion 12d1 of the inner container 12, a tubular plug portion 22b inserted into the inner container 12, and a tubular housing 22c for housing the valve mechanism 21. Have. An inner seal material 19 that seals between the inner container 12 and the valve assembly 13 is held on the outer peripheral surface of the plug portion 22b.
A screw 23 a is formed on the inner surface of the cover cap 23 and is screwed with the screw portion 11 d 1 of the outer container 11. However, the means for fixing the outer container 11 and the valve assembly 13 are not limited to screws.

Returning to FIG. 1, as the pressurizing agent P, a compressed gas such as nitrogen gas, carbon dioxide gas, nitrous oxide gas, helium gas, or air is used. The filling amount is such that the internal pressure is 0.1 to 0.5 MPa (gauge pressure).
The cap 14 covers the upper part of the double container 10 and protects the valve assembly 13 and prevents it from operating when the double container 10 is transferred. In this embodiment, it is an upper-bottom tubular body, and the inner surface is fitted to the outer peripheral surface (annular flange 11d3) of the double container 10. However, its shape is not particularly limited, and its fixing means is also not particularly limited. The cap 14 can also be used as a cap of a discharge product (see FIG. 6a).

A method for manufacturing this double container 10 is shown in FIGS. 5a-5d. First, an empty container containing the inner container 12 in the outer container 11 is prepared (see FIGS. 5A and 5B). In FIG. 5a, the inner container 12 is housed in the outer container 11 with a slight contraction, and a stock solution storage chamber S2 is formed. However, in the prepared double container, the inner container 12 may not be contracted.
After preparing an empty container, the valve assembly 13 is attached to the outer container 11 to seal the pressurizing agent storage chamber S1 and the stock solution storage chamber S2. Next, the pressurizing agent P is filled into the internal container 12 (pressurizing agent storage chamber S2) via the in-valve pressing agent passage 13b of the valve assembly 13 (see FIGS. 5c and 5d). At this time, if the pressurizing agent is filled in a state where the first stem internal passage 26a is closed and the valve internal stock solution passage 13a is blocked, since the stock solution storage chamber S2 is sealed, the pressure of the pressurizing agent causes the internal container 12 to The air in the stock solution storage chamber S2 is expanded and compressed so that the pressure becomes higher than the atmospheric pressure. This can further prevent the pressurizing agent P from penetrating from the inner container 12 to the stock solution storage chamber S2. In addition, the pressurizing agent is filled in a state in which the valve internal stock solution passage 13a is in communication without closing the first stem internal path 26a, and the stock solution storage chamber S2 is also filled with the pressurizing agent to pressurize the stock solution storage chamber S2. May be. Also in this case, the permeation of the pressurizing agent P from the inner container 12 to the stock solution storage chamber S2 can be further prevented. Further, the pressurizing agent P may be filled from the gap between the outer container 11 and the cover cap 23 of the valve assembly 13 immediately before the valve assembly 13 is attached to the outer container 11 (under cup filling). When this under cup filling is performed, the pressurizing agent P may be filled only in the pressurizing agent storage chamber S1 in the inner container, and the pressurizing agent storage chamber S1 and the stock solution storage chamber S2 (the outer container 11 and the inner container 12) may be filled. (Via the vertical passage groove 12P). When filling the pressurizing agent storage chamber S1 and the stock solution storage chamber S2, the filling process is not complicated, and the pressurizing agent P can be further prevented from permeating from the internal container 12 to the stock solution storage chamber S2.
In the double container 10, the inside of the stock solution storage chamber S2 may not be in a pressurized state, and the outer container 11 and the inner container 12 may be brought into close contact with each other.

As a method of manufacturing the empty container, there is a method of molding the outer container 11 and the inner container 12, respectively, and then folding the inner container 12 and inserting it into the outer container 11. At this time, the convex portion 16a of the outer container 11 and the concave portion 17 of the inner container 12 can be inserted so as not to overlap each other. As a second manufacturing method of the empty container, there is a method of molding the outer container 11, inserting an inner preform for the inner container into the outer container 11, and using the inner surface of the outer container 11 as a mold to blow-mold the shoulder and lower parts. To be As a third method for producing an empty container, a double preform in which an inner preform for an inner container is inserted into an outer preform for an outer container is prepared, and the shoulders and lower parts of the outer container 11 and the inner container 12 are blown at the same time. A method of molding may be mentioned. The shape of the inner preform for the inner container 12 above the shoulder is the neck 12d of the inner container 12, and the outer diameter thereof is substantially the same as the inner diameter of the neck 11d of the outer container 11. There is.
When the empty container is prepared by the second and third manufacturing methods, the outer shape of the inner container 12 can be a shape that abuts the inner surface of the outer container 11, that is, the outer surface of the outer container 11 can have substantially the same shape. However, depending on the materials used for the outer container 11 and the inner container 12, the inner container 12 may shrink in the outer container 11 by cooling after blow molding, and may be slightly smaller than the inner surface shape of the outer container 11. Especially, when different materials are used, the difference in shape becomes remarkable. In that case, the stock solution storage chamber S2 is formed in an empty container state as shown in FIG. 5a.
Furthermore, when an empty container is prepared by the second and third manufacturing methods, the groove 16b of the outer container 11 and the recess 17 of the inner container 12 overlap each other, as shown in FIGS. Therefore, after the inner container 12 is molded, the inner sealing material 19 of the valve holder 23 and the inner container 12 are fitted to each other when the valve assembly 13 is fixed, and the cover cap 23 (screw cap) of the valve assembly is rotated. At the same time, the inner container 12 may be rotated within the outer container 11 by a predetermined angle (for example, a half pitch) so that the convex portion 16a of the outer container 11 and the concave portion 17 of the inner container 12 do not overlap each other.

In the double container 10, since the pressurizing agent P is filled in the inner container 12, the pressurizing agent is surrounded by the outer container 11 made of synthetic resin and the stock solution storage chamber S2 between the inner container 12 and the outer container 11. Has been. Particularly, since the stock solution storage chamber S2 is closed and the pressure is higher than the atmospheric pressure due to the compressed air and the filled pressurizing agent, even if the pressurizing agent P passes through the inner container 12, Even when it reaches the undiluted solution storage chamber S2, the undiluted solution storage chamber S2 is pressurized, and further permeation is unlikely to occur. Therefore, the loss of the pressurizing agent P can be suppressed even when the double container 10 is transferred to a factory where the stock solution is filled or is stored in a warehouse for a long time. In this way, the loss of the pressurizing agent P can be suppressed regardless of the quality of the material or thickness of the outer container 11, so that the outer container 11 can be made thin.
Further, in the double container 10, since the outer container 11 and the inner container 12 are made of synthetic resin, it is possible to sterilize the respective spaces, passages and the pressurizing agent P by irradiating them with an electron beam or the like from the outside. In that case, after the pressure agent is filled, it is transferred to a sterilization factory, and after sterilization it is transferred to a stock solution filling factory. Since the internal pressure of the double container 10 is higher than that of the outside, contamination of bacteria and the like is prevented even when the double container 10 is stored for a long period of time.
Thus, the double container 10 is preferable when the pressurizing agent P and the stock solution C are filled in different factories.

As shown in FIGS. 5e to 5h, the double container 10 is constructed by pressurizing and filling the stock solution C into the stock solution storage chamber S2 via the stock solution inside the valve 13a of the stem 26 at the destination stock solution filling factory. It becomes the discharged product 10A. At this time, before filling the stock solution C, the stem 26 is pushed down with the pressurizing agent passage 13b in the valve closed, and the compressed air or the filled pressurizing agent P in the stock solution storage chamber S2 is discharged ( (See Figures 5e, f). As a result, the inner container 12 is expanded by the pressure of the pressurizing agent, and a state where almost no gas remains in the stock solution storage chamber S2 is obtained. The step of exhausting the pressurizing agent before filling the stock solution into the stock solution storage chamber S2 may not be performed. In this case, the stock solution C is pressurized and filled while the gas phase remains, and the gas in the gas phase is exhausted after the stock solution C is filled, whereby the stock solution storage chamber S2 can be made liquid-tight.
When the undiluted solution storage chamber S2 of the double container 10 is filled with undiluted solution C, the bottom portion 12a, the body portion 12b, and the shoulder portion 12c contract and deform so that the volume of the inner container 12 becomes smaller (see FIGS. 5g and 5h). The stock solution C is filled in the stock solution storage chamber S2 in a liquid-tight state, and does not scatter when the stock solution C is discharged. As described above, the contracted shape of the inner container 12 is not limited to the shape shown in this drawing. The contracted shape of the inner container 12 is irregularly deformed according to not only the configuration of the inner container 12 but also the filling path of the stock solution C, the viscosity of the stock solution C, the filling pressure of the stock solution C, and the like. The stock solution C is filled so that the pressure (gauge pressure) in the outer container 11 is 0.2 to 1.0 MPa while compressing the pressurizing agent P in the inner container 12.

Since the discharge product 10A in FIG. 6 is directly contained in the entire inner side of the outer container 11 in which the stock solution C is thin, it is easy to transfer heat to the stock solution C from the outside, and the stock solution C can be easily cooled and heated. For example, it is a preferred container for food. On the other hand, since it is made of synthetic resin having low thermal conductivity, even if the user holds the outer container 11, there is no possibility of being burned. Furthermore, since the pressurizing agent P is also surrounded by the stock solution C in the discharged product 10A, it is more difficult to permeate and the pressure drop due to permeation is small.
When the stock solution C in the stock solution storage chamber S2 of the discharged product 10A is discharged, the bottom portion 12a, the body portion 12b, and the shoulder portion 12c are expanded and deformed (returned to the original shape) so that the capacity of the inner container 12 is increased. The storage chamber S2 can be efficiently contracted. That is, the remaining amount of the stock solution C can be reduced. The neck portion 12d is inserted along the inner surface of the neck portion 11d of the outer container 11 and is not deformed by filling and discharging the stock solution C.
In this embodiment, the inner container 12 has substantially the same shape as the outer container 11, but by discharging the stock solution C, the bottom portion 12a, the body portion 12b, and the shoulder portion 12c are respectively the bottom portion 11a and the body portion of the outer container 11. The shape may be different from the inner shape of the outer container 11 as long as it deforms toward the inner surfaces of the portion 11b and the shoulder portion 11c. For example, the natural shape of the inner container 12 during molding may be smaller than the inner surface shape of the outer container 11. In that case, by discharging the undiluted solution C, the bottom portion 12a, the body portion 12b, and the shoulder portion 12c are expanded (elasticity) to substantially the same shapes as the inner surfaces of the bottom portion 11a, the body portion 11b, and the shoulder portion 11c of the outer container 11, respectively. Or plasticity).

  In the discharge product 10B of FIG. 7, the concave portion 17 of the inner container 12 does not overlap with the convex portion 16a of the rib 16 of the outer container 11 or does not have the same angle about the axis of the inner (outer) container. They are arranged (see FIGS. 7b and 7c). Other configurations are substantially the same as the discharge product 10A in FIG. By alternately arranging the convex portions 16a and the concave portions 17 in this manner, as shown in FIG. 7c, the passage of the stock solution C in the discharged product 10B and the convex section of the outer container 11 until just before the entire quantity of the stock solution C is discharged. This can be ensured by both the vertically extending gap passage 25a formed by 16a and the vertically extending gap passage 25b formed by the recess 17 of the inner container 12. Further, it becomes easy to secure the space of the stock solution storage chamber S2 in the state of the multiple container in which the pressure agent P is filled in the inner container 12, and it becomes easy to suppress the permeation of the pressure agent P.

The double container 30 of FIG. 8 is substantially the same as the double container 10 of FIG. 1 except that the outer container 31 does not have ribs and the valve assembly 33 does not have an in-valve pressurizing agent passage. Is.
The outer container 31 is a container that does not include ribs, but includes a bottom portion 11a, a cylindrical body portion 11b, a tapered shoulder portion 11c, and a cylindrical neck portion 11d. The body portion 11b is preferably one that expands and deforms when the internal pressure is 0.1 MPa (gauge pressure) or more. Since there is no rib, there is no big difference in appearance between the prototype state and the expanded state, but by making it thin so that it can expand and deform due to internal pressure, material saving and weight saving can be achieved, and the outer diameter The presence or absence of pressure can be identified.
The valve assembly 33 is a lid body that includes an in-valve stock solution passage 33a that communicates the stock solution storage chamber S2 with the outside and a valve mechanism 35 that communicates / blocks the valve stock solution passage 33a. The stock solution passage 33a in the valve communicates with the stock solution storage chamber S2 through the vertical passage groove 12P. The valve mechanism 35 includes a stem 36 in which an in-stem passage 36a (a part of the in-valve stock solution passage 13a) is formed. By pushing down the stem 36, the stock solution passage 33a in the valve communicates.
In the method for manufacturing the double container 30, since the valve assembly 33 does not have the in-valve pressurizing agent passage, the pressurizing agent P is filled in the inner container 12 by under cup filling. That is, the pressurizing agent P is filled in the inner container 12, and at the same time, the inner container 12 and the outer container 11 are closed by the valve assembly 33. At this time, the pressurizing agent P may be filled also in the stock solution storage chamber S2 between the outer container and the inner container. Similarly to the double container 10 of FIG. 1, the double container 30 can be transferred to the stock solution filling factory and filled with the stock solution to be a discharge product.
Also in this double container 30, the pressurizing agent P is surrounded by the outer container 11, the inner container 12, and the closed stock solution storage chamber S2. Therefore, loss of the pressurizing agent P due to permeation can be suppressed, which is suitable for long-term storage. Similar to the double container 10 of FIG. 1, it is preferable to fill the pressurizing agent P and the stock solution C in different factories.

The multiple container of the present invention can be made into a triple container by attaching an innermost container such as a pouch to the valve assembly of FIG. 1 and storing the inner container in the inner container. In this case, the innermost container becomes the second stock solution storage chamber, and a stock solution different from the stock solution storage chamber S2 can be filled. The in-valve pressurizing agent passage 13b shown in FIG. 4 serves as a second undiluted solution passage in the valve, and serves as a undiluted solution passage that connects the innermost container and the valve assembly. The pressurizing agent storage chamber is closed.
Also in the case of this triple container, the pressurizing agent storage chamber S1 between the inner container and the innermost container is under-cup filled with the pressurizing agent, and the air in the stock solution storage chamber S2 between the outer container and the inner container is compressed. Alternatively, the stock solution storage chamber S2 can be filled with the pressurizing agent. As a result, loss due to permeation of the pressurizing agent in the inner container can be suppressed, which is suitable for transport and long-term storage.
Further, in this triple container, the first stock solution is filled in the stock solution storage chamber S2 from the stock solution path 13a in the valve and the second stock solution is filled in the innermost container from the second stock solution path in the valve at the stock solution filling factory. It becomes a liquid discharge product.

C stock solution P pressurizing agent S1 pressurizing agent storage chamber S2 stock solution storage chamber 10 double container 10A, 10B discharge product 11 outer container 11a bottom 11b body 11c shoulder 11d neck 11d1 screw 11d2 outer seal holding 11d3 annular flange 12 Inner container 12a Bottom part 12b Body part 12c Shoulder part 12d Neck part 12d1 Flange part 12P Vertical passage groove 12P1 Groove bottom 13 Valve assembly 13a Valve undiluted liquid passage 13b Valve pressure agent passage 14 Cap 15 Push button 16 Rib 16a Convex portion 16b Groove Recessed portion 18 Outer sealing material 19 Inner sealing material 21 Valve mechanism 22 Valve holder 22a Flange portion 22b Plug portion 22c Cylindrical housing 23 Cap 23a Screws 25, 25a, 25b Gap passage 26 Stem 26a First stem inner passage 26b No. Stem passage 30 double container 31 outside the vessel 33 the valve assembly 33a bulb concentrate passage 35 valve mechanism 36 stem 36a stem passage

Claims (6)

An external container made of synthetic resin,
An inner container made of a synthetic resin having flexibility and housed in an outer container,
A valve attached to the outer container to close the outer container and the inner container,
A pressurizing agent contained in an internal container ,
A pressurizing agent and / or compressed air contained in a stock solution containing chamber between the outer container and the inner container ,
Multiple containers for the discharge product by accommodating the stock to the original liquid storage chamber. Preparing the multiple container according to claim 1 ,
Transfer multiple containers before storing the stock solution in the stock solution storage chamber ,
Then pressure filled with stock solution before Kihara liquid storage chamber,
Discharge product manufacturing method. After attaching the valve to the outer container, to prepare the multi-container to compress the air in the sealed stock accommodating chamber by filling the pressurized pressure agent into the interior container from the valve,
The method for manufacturing a discharge product according to claim 2 . After the valve is attached to the outer container, a multiple container is prepared by filling a pressure agent into the inner container and the stock solution storage chamber from the valve.
The method for manufacturing a discharge product according to claim 2 . The pressurized pressure agent filled Previous Symbol Internal container and stock accommodating chamber,
Then, a multiple container is prepared by attaching the valve to an external container,
The method for manufacturing a discharge product according to claim 2 . After the transfer of the multiple containers, the stock solution storage chamber is evacuated, and the stock solution storage chamber is pressurized and filled.
It claims 2-5 method of manufacturing a discharge product according any.