Method for manufacturing liquid-filled containers

Abstract

To provide a manufacturing method of a liquid container that makes it possible to manufacture a container containing multiple types of liquid at a low cost.SOLUTION: The manufacturing method of a liquid container C is provided, in which a pressurized liquid L1 is supplied to the interior of a synthetic resin preform 2 to manufacture the liquid container C containing a content liquid L2 from the preform 2. The manufacturing method of the liquid container C has an additive feeding step of adding an additive 3 into the interior of the preform 2 and a blow molding step of blow molding the preform 2 by supplying a pressurized liquid L1 into the interior of the preform 2 with the additive 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a liquid-containing container, in which a pressurized liquid is supplied into a synthetic resin preform to manufacture a liquid-containing container storing a content liquid from the preform.

Background Art

[0002] Containers made of synthetic resin, such as bottles made of polypropylene (PP) or polyethylene terephthalate (PET), are used for storing various liquids, such as beverages, cosmetics, pharmaceuticals, detergents, and toiletries such as shampoos, as content liquids. Such containers are generally manufactured by blow molding a synthetic resin preform having the above-described thermoplasticity.

[0003] As blow molding for forming a preform into a container, liquid blow molding is known in which a pressurized liquid is used as a pressurizing medium supplied into the preform instead of pressurized air.

[0004] For example, in Patent Document 1, a synthetic resin preform heated in advance to a temperature at which extensibility is exhibited is set in a blow molding die, and a liquid pressurized to a predetermined pressure is supplied into the preform through a blow nozzle, whereby the preform is formed into a container having a predetermined shape along the cavity of the blow molding die. A liquid blow molding method is described.

[0005] In the liquid blow molding method as described above, by using, as the liquid supplied to the preform, for example, a content liquid that is finally stored in the container as a product such as a beverage, the molding of the container and the filling of the content liquid into the container can be performed simultaneously, and a liquid-containing container storing the content liquid can be manufactured. According to such a method for manufacturing a liquid-containing container, the filling step of the content liquid into the molded container can be omitted, and the liquid-containing container can be manufactured at a low cost.

Prior Art Documents

[0006] [Patent Document 1] Japanese Patent Publication No. 2018-183973 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, the conventional method for manufacturing liquid-filled containers described above had a problem: when manufacturing multiple types of liquid-filled containers containing different types of liquids, it was necessary to either clean the inside of the blow molding machine each time the type of liquid was changed, or to prepare multiple tanks and multiple blow molding machines corresponding to each type of liquid. As the number of types of liquid-filled containers increased, the manufacturing costs increased.

[0008] This invention has been made in view of the above problems, and its purpose is to provide a method for manufacturing liquid-filled containers that can produce multiple types of liquid-filled containers at low cost. [Means for solving the problem]

[0009] The present invention relates to a method for manufacturing a liquid-filled container, comprising supplying pressurized liquid into a synthetic resin preform to produce a liquid-filled container containing the liquid from the preform, the method comprising: an additive addition step of adding an additive to the preform; and a blow molding step of supplying pressurized liquid into the preform containing the additive and blow molding the preform. Furthermore, as the additive, a capsule containing the additive component soluble in the liquid is used. It is characterized by the following.

[0012] The present invention relates to a method for manufacturing a liquid-filled container, comprising supplying a pressurized liquid into a synthetic resin preform to produce a liquid-filled container containing the liquid from the preform, the method comprising: an additive addition step of adding an additive to the preform; and a blow molding step of supplying the pressurized liquid into the preform containing the additive and blow molding the preform, wherein the additive is: liquid The present invention is characterized by using a solid material obtained by drying and solidifying a material, which is diffused, mixed, or dissolved in the pressurized liquid supplied inside the preform, thereby converting the liquid into a desired type of liquid content.

[0013] In the method for manufacturing a liquid-filled container of the present invention, in the above configuration, it is preferable to perform biaxial stretch blow molding using a stretching rod in the blow molding step, and to crush the additive with the stretching rod. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a method for manufacturing liquid-filled containers that can produce multiple types of liquid-filled containers at low cost. [Brief explanation of the drawing]

[0015] [Figure 1] This is an explanatory diagram showing an example of a manufacturing apparatus for a liquid-filled container used in a liquid blow molding method, which is one embodiment of the present invention. [Figure 2] (a), (b), and (c) are cross-sectional views of the preforms after the additives have been added during the additive addition process. [Figure 3] This is an explanatory diagram showing a manufacturing apparatus for liquid-filled containers, in which a preform containing additives is set in a mold and engaged with a blow nozzle. [Figure 4] This is an explanatory diagram showing a manufacturing apparatus for liquid-filled containers during the blow molding process. [Figure 5]It is an explanatory diagram showing a manufacturing apparatus for a liquid-filled container in a state where the blow molding process is completed and the sealing body is closed. [Figure 6] It is an explanatory diagram showing a manufacturing apparatus for a liquid-filled container in a state where the headspace forming process has been performed. [Figure 7] It is an explanatory diagram showing a manufacturing apparatus for a liquid-filled container in a state where the liquid-filled container is completed.

Embodiments for Carrying Out the Invention

[0016] Hereinafter, the present invention will be more specifically illustrated and described with reference to the drawings.

[0017] A method for manufacturing a liquid-filled container according to an embodiment of the present invention is a method for manufacturing a liquid-filled container that supplies pressurized liquid into a preform made of synthetic resin and manufactures a liquid-filled container that stores the content liquid from the preform, and includes an additive input step of putting an additive into the preform, and a blow molding step of supplying pressurized liquid into the preform into which the additive has been put and blow molding the preform. It is a method for manufacturing a liquid-filled container characterized by having these steps.

[0018] That is, in the method for manufacturing a liquid-filled container according to an embodiment of the present invention, an additive is previously put into the preform, and in that state, pressurized liquid is supplied into the preform to perform liquid blow molding, so that the additive is diffused, mixed or dissolved in the liquid in the container, and the content liquid stored in the formed container is made into a desired type of content liquid in which the additive is diffused, mixed or dissolved in the liquid.

[0019] The method for manufacturing a liquid-filled container of the present invention can be implemented using, for example, a manufacturing apparatus 1 for a liquid-filled container having the configuration shown in FIG. 1.

[0020] The manufacturing apparatus 1 for a liquid-filled container shown in FIG. 1 manufactures a liquid-filled container that stores the content liquid from the preform 2 by supplying pressurized liquid into the preform 2 made of synthetic resin and performing blow molding.

[0021] As the preform 2, for example, a synthetic resin material having thermoplasticity such as polypropylene (PP) or polyethylene terephthalate (PET) is formed into a bottomed cylindrical shape having a cylindrical mouth portion 2a that is not stretched by blow molding and a cylindrical body portion 2b that is continuous with the mouth portion 2a and has a closed lower end. can be used. Further, the preform 2 can also have a laminated structure having layers of a plurality of types of synthetic resin materials.

[0022] Although not shown in detail, an engaging projection is provided on the outer wall surface of the mouth portion 2a for attaching a closing cap (not shown) to the mouth portion 2a of the liquid-filled container after molding by undercut engagement. In addition, instead of the engaging projection, a male screw may be provided on the outer wall surface of the mouth portion 2a so that the closing cap can be attached to the mouth portion 2a by screw connection.

[0023] The manufacturing apparatus 1 for the liquid-filled container has a blow molding die 10. The blow molding die 10 has a cavity 11 having a shape corresponding to the final shape of the liquid-filled container, such as a bottle shape. The cavity 11 opens upward on the upper surface of the blow molding die 10. The preform 2 is mounted on the blow molding die 10 in a state where the body portion 2b is disposed inside the cavity 11 of the blow molding die 10 and the mouth portion 2a protrudes upward from the blow molding die 10.

[0024] The blow molding die 10 can be opened and closed left and right, and after the preform 2 is formed into a liquid-filled container, the blow molding die 10 is opened left and right so that the liquid-filled container can be taken out of the blow molding die 10.

[0025] Above the blow molding die 10, a nozzle unit 20 for supplying the pressurized liquid L1 into the preform 2 is provided. The nozzle unit 20 has a main body block 21, and this main body block 21 is movable relative to the blow molding die 10 in the vertical direction.

[0026] A support block 22 is provided at the lower end of the main body block 21, and a blow nozzle 23 is mounted on the lower end of the main body block 21, supported by the support block 22. The blow nozzle 23 is formed in a substantially cylindrical shape and engages with the opening 2a of the preform 2 mounted on the blow molding die 10 from above in a sealed state when the main body block 21 has descended to the lower stroke end.

[0027] Inside the main body block 21, there is a supply passage 24 that extends in the vertical direction. This supply passage 24 is a flow path for supplying liquid L1 to the blow nozzle 23, and its lower end is in communication with the blow nozzle 23.

[0028] Furthermore, the main body block 21 is provided with a supply port 25 that communicates with the upper end of the supply path 24.

[0029] A seal body 26 for opening and closing the blow nozzle 23 is positioned inside the supply passage 24. The seal body 26 is fixed to the lower end of a shaft 27 that is provided on the nozzle unit 20 so as to be movable in the vertical direction, and is movable in the vertical direction inside the supply passage 24. The seal body 26 may be formed integrally with the shaft 27. The seal body 26 is formed in a cylindrical shape, and when it moves to the closed position, which is the lower stroke end position, its lower end surface contacts the upper surface of the blow nozzle 23, closing the blow nozzle 23. On the other hand, when the seal body 26 moves upward from the closed position, the blow nozzle 23 opens and communicates with the supply passage 24.

[0030] The liquid container manufacturing apparatus 1 can be configured to include a stretching rod 28. The stretching rod 28 is inserted into the axis of the shaft 27 so as to be movable relative to the shaft 27 in the vertical direction, and is provided so as to penetrate the axis of the seal body 26 and extend and retract from the lower end of the seal body 26. The stretching rod 28 is driven by a drive source (not shown) and moves downward, thereby stretching the preform 2 in the axial direction.

[0031] A pressurized liquid supply source 30 is connected to the supply port 25 by piping P1. The pressurized liquid supply source 30 can be configured as a plunger pump, for example, comprising a cylinder 30a and a plunger (piston) 30b.

[0032] A supply tank 31 is connected to the pressurized liquid supply source 30. The supply tank 31 can be configured to contain liquid L1 and heat the liquid L1 to a predetermined temperature and maintain that temperature. An on-off valve V1 is provided in the flow path between the pressurized liquid supply source 30 and the supply tank 31, and this on-off valve V1 can open and close the flow path.

[0033] The pressurized liquid supply source 30 operates in the forward direction (pressurizing direction) when the seal body 26 moves upward and the blow nozzle 23 is open, thereby supplying pressurized liquid L1 to the inside of the preform 2 via the piping P1, supply port 25, supply passage 24, and blow nozzle 23. The pressurized liquid supply source 30 also operates in the reverse direction when the blow nozzle 23 is closed by the seal body 26 and the on-off valve V1 is open, thereby drawing the liquid L1 contained in the supply tank 31 into the inside of the cylinder 30a, in preparation for the next liquid blow molding.

[0034] The operation of the nozzle unit 20, seal body 26, extension rod 28, pressurized liquid supply source 30, and on-off valve V1, etc., is integrally controlled by a control device (not shown).

[0035] Next, a method for manufacturing a liquid-filled container containing a desired type of liquid (a method for manufacturing a liquid-filled container according to this embodiment) will be described, which involves supplying pressurized liquid L1 into a synthetic resin preform 2 using a liquid-filled container manufacturing apparatus 1 with the above configuration, thereby manufacturing a liquid-filled container containing a desired type of liquid from the preform 2.

[0036] First, as shown in Figure 2, an additive 3 is placed inside a preform 2 that has been preheated to a predetermined temperature (e.g., 80°C to 150°C) to the extent that it exhibits stretchability using a heating means (not shown), or inside a preform 2 that has been injection molded and maintained at a stretchable temperature (additive addition step). As described above, the additive 3 diffuses, mixes, or dissolves in the liquid L1 used as a pressurizing medium in liquid blow molding, thereby making the liquid L1 a desired type of liquid content.

[0037] Additive 3 can be, for example, a liquid 3a such as a concentrate, as shown in Figure 2(a). In this case, the desired amount of additive 3 (liquid 3a) can be injected into the preform 2 using an injection device (not shown) or by hand. By making additive 3 consist only of liquid 3a such as a concentrate, additive 3 can be easily mixed with liquid L1 and also be made inexpensive. Note that liquid 3a may be a liquid other than a concentrate.

[0038] Furthermore, the additive 3 can be, for example, as shown in Figure 2(b), a desired type of liquid additive component 3b enclosed in a capsule 3c that is soluble in liquid L1. In this case, the desired number of additives 3 can be added to the inside of the preform 2 using an ingestion device (not shown) or manually. By configuring the additive 3 as additive component 3b enclosed in a capsule 3c, the additive 3 can be easily handled while also being easily diffused, mixed, or dissolved in liquid L1. Note that the additive component 3b is not limited to a liquid, but may also be in solid form (including powder form).

[0039] Furthermore, the additive 3 can also be in the form of a tablet-like solid 3d, for example, as shown in Figure 2(c), which is made by drying and solidifying a desired type of additive component. In this case, the desired number of solids 3d can be added to the inside of the preform 2 using an input device (not shown) or by hand. By making the additive 3 a solid 3d, the handling of the additive 3 can be made easier.

[0040] More specifically, if the final liquid content to be contained in a liquid-filled container as a product is a fruit juice beverage, the additive 3 can be a concentrated liquid (concentrate) 3a of the fruit juice, a water-soluble capsule 3c containing the liquid 3a as an additive component 3b, or a solid 3d obtained by drying and solidifying the fruit juice. Furthermore, if the final liquid content to be contained in a liquid-filled container as a product is another beverage such as tea or coffee, the additive 3 can be a concentrated liquid (concentrated content) 3a of these beverages, a water-soluble capsule 3c containing the liquid 3a, or, in the case of tea, a solid 3d obtained by crushing and solidifying tea leaves, or in the case of coffee, a solid 3d obtained by concentrating, drying, and solidifying the extract.

[0041] As described above, when the liquid content that will ultimately be contained in the liquid-filled container as the final product is a beverage such as fruit juice, tea, or coffee, water or hot water will be used as the liquid L1 supplied to the preform 2 as a pressurizing medium during blow molding.

[0042] Additive 3 is not limited to those described above. Any additive that can diffuse, mix, or dissolve in liquid L1 to make liquid L1 into a desired type of liquid can be used, and is not limited to concentrated liquids or solids, but can be in various forms, such as powders.

[0043] Furthermore, the liquid content that is ultimately contained in the liquid-filled container as a product is not limited to beverages; it can be a variety of liquids such as cosmetics, pharmaceuticals, detergents, shampoos, and other toiletries. In these cases as well, various liquids such as water can be used as the liquid L1 supplied to the preform 2 as a pressurizing medium during blow molding.

[0044] Furthermore, the liquid L1 supplied to the preform 2 as a pressurizing medium during blow molding is not limited to water. Any liquid that allows the additive 3 to diffuse, mix, or dissolve to form the desired liquid content can be used. Depending on the type of additive 3, this may include not only liquids with a single component like water, but also liquids with a single component other than water, or liquids consisting of a mixture of multiple components. In other words, by using a liquid with common components as the pressurizing medium L1 used in blow molding and simply replacing the additive 3 with a different type, multiple types of liquid containers holding different liquid contents can be easily manufactured.

[0045] Next, as shown in Figure 1, the preform 2 containing the additive 3 is set in the blow molding die 10, and then, as shown in Figure 3, the nozzle unit 20 is lowered toward the blow molding die 10 to engage the blow nozzle 23 with the opening 2a of the preform 2 in a sealed state. In this state, the seal body 26 and the on / off valve V1 are closed, and the extension rod 28 is held in its original position so as not to protrude downward from the blow nozzle 23.

[0046] Furthermore, the additive addition process is not limited to being performed before setting the preform 2 in the blow molding die 10; it may also be performed after setting the preform 2 in the blow molding die 10. In this embodiment, where the additive addition process is performed before setting the preform 2 in the blow molding die 10, it is easier to secure workspace for adding the additive 3 to the preform 2, thus making it possible to perform this operation in a container.

[0047] Next, as shown in Figure 4, a blow molding process is performed. In the blow molding process, with the on / off valve V1 closed and the seal body 26 raised to open the blow nozzle 23, the pressurized liquid supply source 30 is operated in the forward direction, and pressurized liquid L1 is supplied to the inside of the preform 2 containing the additive 3 through the blow nozzle 23 to a predetermined pressure. Then, the pressure of the pressurized liquid L1 stretches the preform 2 and molds it into a liquid-filled container C of a predetermined shape that conforms to the inner surface of the cavity 11 of the blow molding die 10.

[0048] At this time, the additive 3 placed inside the preform 2 diffuses, mixes, or dissolves in the liquid L1 supplied inside the preform 2, so that the liquid L1 becomes the desired type of liquid L2 according to the type of additive 3. The additive 3 may diffuse, mix, or dissolve in the liquid L1 due to the pressure of the liquid L1 supplied inside the preform 2, or it may diffuse, mix, or dissolve in the liquid L1 regardless of the pressure of the liquid L1.

[0049] In the blow molding process, the stretching rod 28 is moved downward, and the body portion 2b of the preform 2 is stretched axially (vertically) by the stretching rod 28. By stretching the preform 2 axially with the stretching rod 28 during the blow molding process, biaxial stretch blow molding can be performed. This allows the preform 2 to be molded into a liquid-filled container C of a predetermined shape with greater precision.

[0050] In this case, if the additive 3 is enclosed in a capsule 3c or is a solid 3d, the additive 3 may be crushed between the inner surface of the bottom of the preform 2 and the lower end of the stretching rod 28 to diffuse, mix, or dissolve the additive 3 in the liquid L1.

[0051] Once the blow molding process is complete, the seal body 26 is lowered to close the blow nozzle 23, as shown in Figure 5, and the operation of the pressurized liquid supply source 30 is stopped. Then, as shown in Figure 6, with the blow nozzle 23 still closed, the stretch rod 28 is moved upward to detach it from the liquid-filled container C. As a result, the liquid-filled container C deforms to a volume reduction by the amount that the stretch rod 28 has been pulled out. Then, as shown in Figure 7, the nozzle unit 20 is moved upward relative to the blow molding mold 10, and the blow nozzle 23 is detached from the mouth 2a of the liquid-filled container C. This releases the negative pressure inside the liquid-filled container C, and a predetermined amount of headspace HS is formed inside the liquid-filled container C.

[0052] With the above steps completed, the manufacturing of the liquid-filled container C containing the desired type of liquid L2 is finished. The completed liquid-filled container C is removed from the blow molding die 10 when the die is opened, and a sealing cap is attached to the opening 2a to form the final product. At this time, the pressurized liquid supply source 30 operates in the reverse direction, drawing the liquid L1 contained in the supply tank 31 into the cylinder 30a. Alternatively, the blow molding die 10 may be opened and the liquid-filled container C removed from the blow molding die 10 after the sealing cap has been attached to the opening 2a.

[0053] Thus, according to the manufacturing method of liquid-filled containers of this embodiment, after adding additive 3 to the preform 2 in the additive addition step, pressurized liquid L1 is supplied to the preform 2 containing additive 3 in the blow molding step, and the preform 2 is blow molded. Therefore, by changing the type of additive 3 while using the same liquid L1, multiple types of liquid-filled containers C containing different types of liquid contents L2 can be manufactured using the same liquid-filled container manufacturing apparatus 1 and supply tank 31. In this case, since the same liquid can be used as liquid L1, cleaning of the liquid-filled container manufacturing apparatus 1 and supply tank 31 is unnecessary even if the type of liquid contents L2 stored in the liquid-filled container C is changed, and multiple types of liquid-filled container manufacturing apparatus 1 and supply tank 31 are also unnecessary. Therefore, according to the manufacturing method of liquid-filled containers of this embodiment, multiple types of liquid-filled containers C can be manufactured at low cost.

[0054] In this embodiment, the method for manufacturing a liquid-filled container can also be configured such that, after the preform 2 containing the additive 3 is set in the blow molding die 10, a liquid replacement step is performed before the blow molding process.

[0055] In the liquid replacement process, the blow nozzle 23 is engaged with the opening 2a of the preform 2, the seal body 26 is moved upward to open the blow nozzle 23, and in this state, the pressurized liquid supply source 30 is operated in the forward direction (pressurizing direction) at a lower operating speed than in the blow molding process. When the pressurized liquid supply source 30 is operated, liquid L1 is supplied to the inside of the preform 2 containing the additive 3 through the blow nozzle 23. The pressure of the liquid L1 is small enough not to stretch the preform 2. At this time, the blow nozzle 23 is provided with a discharge passage that is open to the outside of the main body block 21, and the air inside the preform 2 is discharged to the outside through this discharge passage.

[0056] Through this liquid replacement process, the air inside the preform 2 is replaced with liquid L1, and the inside of the preform 2 is filled with liquid L1. The additive 3 placed in the preform 2 may be diffused, mixed, or dissolved in the liquid L1 supplied to the inside of the preform 2 during the liquid replacement process. By diffusing, mixing, or dissolving the additive 3 in liquid L1 during the liquid replacement process, the additive 3 can be more reliably diffused, mixed, or dissolved in liquid L1 during the blow molding process.

[0057] In this embodiment, the method for manufacturing a liquid-filled container can also be configured to provide headspace HS by performing a suck-back process after the blow molding process, in which an amount of liquid content L2 equivalent to the headspace HS is sucked out from inside the liquid-filled container C.

[0058] In this case, a separate channel for suck-back is provided in addition to the blow nozzle 23, and the contents L2 inside the liquid-filled container C are sucked into this suck-back channel. The contents L2 sucked back into the suck-back channel may be discarded as is, or it may be supplied to the inside of the next preform 2.

[0059] In the blow molding process, a predetermined amount of liquid L1, less than the full capacity of the liquid-filled container C, is supplied under pressure to the inside of the preform 2 to liquid blow mold the preform 2 to an intermediate shape. Then, pressurized air is supplied to the inside of the preform 2 from a gas supply port provided separately from the blow nozzle 23 to mold the intermediate-shaped preform 2 to the final shape that conforms to the inner surface of the blow molding die 10, thereby forming a headspace HS inside the liquid-filled container C after molding, corresponding to the amount of pressurized air supplied.

[0060] The present invention is not limited to the embodiments described above, and it goes without saying that various modifications are possible without departing from the spirit of the invention.

[0061] For example, in the above embodiment, the method for manufacturing a liquid-filled container of the present invention was shown using the liquid-filled container manufacturing apparatus 1 with the configuration shown in Figure 1. However, the method for manufacturing a liquid-filled container of the present invention can also be performed using a liquid-filled container manufacturing apparatus or the like with other configurations.

[0062] Furthermore, in the above embodiment, a liquid-filled container manufacturing apparatus 1 equipped with a stretching rod 28 is used to perform biaxial stretch blow molding in the blow molding process. However, a configuration in which blow molding is performed without using the stretching rod 28 is also possible. In this case, a liquid-filled container manufacturing apparatus 1 without the stretching rod 28 can be used.

[0063] Furthermore, various shapes can be used as preform 2, depending on the shape of the liquid-filled container C after molding. [Explanation of symbols]

[0064] 1. Manufacturing apparatus for liquid-filled containers 2 preform 2a Mouth 2b Torso 3 Additives 3a liquid 3b Additive ingredients 3c Capsules 3d solids 10 Blow molding dies 11 Cavity 20 Nozzle Units 21 Main block 22 Support Blocks 23 Blow nozzle 24 Supply route 25 supply ports 26 seals 27 Axis 28 Extension Rod 30 Pressurized liquid supply source 30a Cylinder 30b Plunger 31 Supply Tank L1 liquid P1 Piping V1 Shut-off valve L2 content liquid C. Container containing liquid HS Headspace

Claims

1. A method for manufacturing a liquid-filled container, comprising supplying a pressurized liquid into a preform made of synthetic resin to produce a liquid-filled container containing the liquid from the preform, The additive addition step involves adding an additive to the inside of the aforementioned preform, The process includes a blow molding step in which the preform containing the additive is supplied with pressurized liquid to blow mold the preform, A method for manufacturing a liquid-containing container, characterized in that the additive is contained in a capsule having solubility in the liquid.

2. A method for manufacturing a liquid-filled container, comprising supplying a pressurized liquid into a preform made of synthetic resin to produce a liquid-filled container containing the liquid from the preform, The additive addition step involves adding an additive to the inside of the aforementioned preform, The process includes a blow molding step in which the preform containing the additive is supplied with pressurized liquid to blow mold the preform, A method for manufacturing a liquid-filled container, characterized in that the additive is a solid obtained by drying and solidifying a liquid, which is diffused, mixed, or dissolved in the pressurized liquid supplied inside the preform to make the liquid a desired type of content liquid.

3. A method for manufacturing a liquid-filled container according to claim 1 or 2, wherein, in the blow molding step, biaxial stretch blow molding is performed using a stretching rod, and the additive is crushed by the stretching rod.

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