JP6668672B2 - Preform, method for producing preform, apparatus for crystallizing preform, plastic bottle, and method for producing filler - Google Patents

Description

  The present invention relates to a preform, a method for producing a preform, an apparatus for crystallizing a preform, a plastic bottle, and a method for producing a filler, and more particularly, to filling a molded plastic bottle while sterilizing a liquid at a high temperature with a liquid. The present invention relates to a preform, a preform manufacturing method, a preform crystallization apparatus, a plastic bottle, and a method for manufacturing a filled body, which support so-called hot filling.

  A plastic bottle is often used as a container filled with a liquid such as a beverage as a content. For the production of plastic bottles, a method of molding a test tubular preform from a resin using an injection molding machine or the like and molding the preform into a bottle shape using a blow molding machine is often used. As a method of filling the contents into the plastic bottle, there are so-called hot filling in which the liquid at a high temperature (for example, 85 ° C.) is filled in the plastic bottle, and aseptic filling in which the liquid at a normal temperature (for example, 30 ° C.) is filled. There is.

  Since aseptic filling does not require heat resistance of the plastic bottle, its molding is relatively easy. For this reason, in the aseptic filling method, in many cases, an aseptic filling system is formed in which a plastic bottle blow molding machine is inlined with the filling machine. If the plastic bottle is molded in-line, the form of the container supplied to the aseptic filling system can be changed to a preform that is smaller in volume than the plastic bottle, greatly improving the transportation efficiency from the container manufacturer. For example, it can be increased by a factor of six or more. Therefore, the aseptic filling system using aseptic filling in which a plastic bottle blow molding machine is inlined contributes to a reduction in container transportation costs and a reduction in environmental load.

  On the other hand, a hot-filling system, which does not require a blow molding machine due to the bottle supply method and can reduce the initial cost as compared with an aseptic filling system using aseptic filling, is often used. However, in the method using hot filling, a measure to impart heat resistance to the plastic bottle so that the plastic bottle is not deformed by a high-temperature liquid, for example, crystallization of the mouth and the body is required, so that the production capacity is reduced, and Cost increases.

  Patent Literature 1 discloses that after forming a container, the formed container is directly transferred to a content filling step, and the content is filled into a mouth amorphous polyester container. A method for producing container-packed contents in which the container is sterilized within a temperature range of 61 ° C. or higher and lower than the glass transition temperature (80 ° C. or lower) determined by the water content of the container.

JP-A-2004-331205

  According to the method for manufacturing a container-filled content disclosed in Patent Document 1, by directly transferring a molded container to a content-filling step, the time from container molding to content-filling is shortened, so that the container is placed in an external environment. It is said that the amount of moisture absorbed from the container decreases, and the water content of the container can be kept low accordingly. A sufficient commercial sterility can be obtained by filling the container with a filling temperature (61 to 80 ° C) within a temperature range of 61 ° C or higher and lower than the glass transition temperature determined by the water content of the container. Therefore, it is possible to use a non-crystalline polyester container having a mouth having a glass transition temperature within this temperature range.

  However, Patent Literature 1 does not make any description about inlining a plastic bottle blow molding machine and a filling machine. That is, Patent Literature 1 does not disclose at all that a plastic bottle is reduced in a state in which heat resistance is reduced by humidification by in-line processing.

  Further, Patent Document 1 discloses that a method for producing a PET (PolyEthylene Terephthalate) bottled beverage generally involves filling a PET bottle with the content liquid at a high filling temperature of 85 to 95 ° C. It is described that a mouth-crystallized PET bottle having sufficient heat resistance must be used, and a mouth-non-crystallized PET bottle without a crystallized mouth cannot be used. In Patent Literature 1, a filling temperature exceeding 80 ° C. is unnecessary for sterilization of the bottle, which is a waste of energy. In addition, if the filling temperature exceeds 80 ° C., sufficient heat resistance is required for a non-crystalline PET bottle at the mouth. It is said that it will be difficult to obtain a PET bottle, and no study has been made on a method for producing a general PET bottled beverage. In the method of Patent Document 1, sterilization may be insufficient depending on the type of the contents.

  When a PET bottle molded from a preform having a non-crystalline mouth is filled with a high-temperature content and sterilized, the mouth, particularly the top surface, is deformed under the influence of heat. To avoid this, the mouth must be crystallized. However, the mouth shrinks when it is crystallized, so when trying to align the finished dimensions with those that do not crystallize, the mouth cannot utilize the non-crystalline mold for preforms, and a new It takes time and effort to manufacture a mold. On the other hand, when a mold for a preform having a non-crystalline mouth is used, the finished size changes, and a cap that is widely used as a standard cannot be used.

  Accordingly, an object of the present invention is to provide a preform in which the mouth portion has a shape that is widely used as a standard for filling at room temperature, and a decrease in sealing performance due to shrinkage or deformation due to a high-temperature liquid to be filled is suppressed. An object of the present invention is to provide a method for manufacturing a preform, a crystallization apparatus for a preform, a plastic bottle, and a method for manufacturing a filler.

In order to solve the above problems, the present invention is an amorphous preform for molding a plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be mounted. The closing ring includes at least an outer ring, and includes a mouth to which the cap is attached from the side of the opening end, and a body connected to a support ring of the mouth , wherein the mouth is not circumferentially fixed. Continuously, the side of the opening end with which the outer ring contacts is crystallized .

  Further, the opening end side is a region extending from the opening end to the support ring up to 5 mm.

  The mouth further includes a screw that meshes with a screw formed on the cap, a root diameter of the screw is 26 mm or less, and an inside diameter of the mouth is 21.74 mm ± 0.13 mm. I do.

  Further, the temperature of the high-temperature liquid is 71 ° C. or more and 95 ° C. or less.

  Furthermore, the temperature of the high-temperature liquid is 81 ° C. or more and 90 ° C. or less.

Furthermore, the present invention has a heat resistance to high temperatures of the liquid to be filled, a process for the production of a preform of amorphous for molding plastic bottles that are sealed by the closure ring of the cap to be attached, the The closing ring includes at least an outer ring, and the preform includes a mouth on which the cap is mounted from an open end side, and a body connected to a support ring of the mouth , wherein the mouth has a circumferential shape. The side of the open end that contacts the outer ring is crystallized discontinuously in a direction .

  Further, the opening end side is heat-treated discontinuously in the circumferential direction.

  Further, the heat treatment is performed at eight places in the circumferential direction.

  Further, heat insulation is provided between the side of the opening end and the side of the support ring.

  Further, the support ring is cooled.

Further, the present invention provides a preform crystal which has heat resistance to a high temperature liquid to be filled and partially crystallizes a preform for molding a plastic bottle sealed by a closing ring of a cap to be mounted. a apparatus comprises said closure ring is at least the outer ring, a retainer for holding the mouth portion of the preform, and a heating processing section for heating the mouth portion, the heat processing unit, peripheral Discontinuously in the direction, the outer ring is configured to heat-treat the side of the opening end of the mouth that contacts , and the holder is configured to suppress deformation of the heated side of the opening end. It is characterized by being performed.

Further, the present invention is a plastic bottle having heat resistance against a high-temperature liquid to be filled and sealed by a closing ring of a cap to be attached, wherein the closing ring includes at least an outer ring, and is located on a side of an open end. From the mouth to which the cap is mounted, a shoulder connected to the support ring of the mouth, a trunk connected to the shoulder, and a bottom connected to the trunk, the mouth is, It is characterized in that the side of the opening end with which the outer ring contacts is discontinuously crystallized in the circumferential direction .

Furthermore, the present invention includes a mouth portion to which a cap is attached from an open end side, and a body portion connected to a support ring of the mouth portion, wherein the mouth portion is molded from a non-crystalline preform and filled. A method for producing a filled body in which a plastic bottle having heat resistance to a high-temperature liquid to be filled is filled with the high-temperature liquid, wherein the cap has at least an outer ring, and the outer is discontinuous in a circumferential direction. Heating the body of the preform, the side of the opening end of which the ring contacts is crystallized; blow molding the plastic bottle using a mold from the preform; Filling the liquid with the high temperature; attaching a cap to the mouth of the plastic bottle; A step of overturning sterilized and the cap, characterized in that it comprises a step of cooling the plastic bottle.

  Furthermore, a step of heating the body, a step of blow molding the plastic bottle, a step of filling the liquid, a step of attaching the cap, and a step of overturning and sterilizing the mouth and the cap. And the step of cooling the plastic bottle is all performed in an in-line manner.

According to the present invention, there is provided an amorphous preform for molding a plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be mounted, wherein the closing ring has at least a shape. Including an outer ring, a mouth portion to which a cap is attached from the opening end side, and a body portion connected to a support ring of the mouth portion , wherein the mouth portion is discontinuous in a circumferential direction, and the opening is in contact with the outer ring. Since the end side is crystallized, even if the mouth has a shape that is widely used as a standard for room temperature filling, a decrease in sealing performance due to shrinkage and deformation by the filled high-temperature liquid was suppressed. Preform can be provided.

  Furthermore, according to the configuration in which the side of the open end is a region extending from the open end to the support ring by 5 mm, even if the mouth has a shape that is widely used as a standard for room temperature filling, the filled high temperature The present invention can provide a preform in which a decrease in sealing performance due to shrinkage or deformation due to liquid is suppressed.

  The mouth further has a screw that meshes with a screw formed on the cap, and the root diameter of the screw is 26 mm or less, and the inside diameter of the mouth is 21.74 mm ± 0.13 mm. Even if the shape is widely used as a standard for filling at room temperature, it is possible to provide a preform in which a decrease in hermeticity due to shrinkage or deformation due to the filled high-temperature liquid is further suppressed.

  Furthermore, since the temperature of the high-temperature liquid is 71 ° C. or more and 95 ° C. or less, the mouth and the cap of the plastic bottle molded from the preform can be effectively sterilized. And even if the mouth part has a shape that is widely used as a standard for filling at room temperature, it is possible to provide a preform in which a decrease in sealing performance due to shrinkage or deformation due to a high-temperature liquid to be filled is suppressed. .

  Furthermore, since the temperature of the high-temperature liquid is 81 ° C. or more and 90 ° C. or less, the mouth and the cap of the plastic bottle molded from the preform can be effectively sterilized. And even if the mouth part has a shape that is widely used as a standard for filling at room temperature, it is possible to provide a preform in which a decrease in sealing performance due to shrinkage or deformation due to a high-temperature liquid to be filled is suppressed. .

Furthermore, according to the present invention, there is provided a method for producing an amorphous preform for molding a plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be mounted. The closing ring includes at least an outer ring, and the preform includes a mouth to which a cap is attached from an open end side, and a body connected to a support ring of the mouth , and the mouth is not circumferentially fixed. Since the open end side where the outer ring contacts continuously is crystallized, even if the mouth has a shape that is widely used as a standard for room temperature filling, it is caused by shrinkage and deformation due to the high temperature liquid to be filled. It is possible to provide a method for producing a preform in which a decrease in sealing performance is suppressed.

  Furthermore, since the opening end side is heat-treated discontinuously in the circumferential direction, even if the mouth has a shape that is widely used as a standard for room temperature filling, it is caused by shrinkage and deformation due to the high temperature liquid to be filled. It is possible to provide a method for producing a preform in which a decrease in sealing performance is further suppressed.

  Furthermore, since the heat treatment is performed at eight locations in the circumferential direction, even if the mouth has a shape that is widely used as a standard for filling at room temperature, a decrease in sealing performance due to shrinkage or deformation due to the high-temperature liquid to be filled is caused. It is possible to provide a method for producing a preform that is more suppressed.

  Furthermore, since the heat is insulated between the open end side and the support ring side, even if the opening has a shape that is widely used as a standard for room temperature filling, it is not easily shrunk or deformed by the filled high-temperature liquid. It is possible to provide a method for producing a preform in which a decrease in sealing performance caused by the preform is suppressed.

  Furthermore, since the side of the support ring is cooled, even if the mouth portion has a shape widely used for normal temperature filling, a decrease in sealing performance due to shrinkage or deformation due to the high temperature liquid to be filled is suppressed. And a method for producing a preform.

Furthermore, according to the present invention, a preform having heat resistance to a high-temperature liquid to be filled and partially crystallizing a preform for molding a plastic bottle sealed by a closing ring of a cap to be mounted. In the crystallization apparatus, the closing ring includes at least an outer ring, includes a holder for holding the mouth of the preform, and a heat treatment unit for heating the mouth, and the heat treatment unit extends in the circumferential direction. Discontinuously, the outer ring is configured to heat-treat the side of the open end of the mouth that comes into contact , and the holder is configured to have a shape that suppresses deformation of the heated side of the open end. However, even if it has a shape that is widely used as a standard for filling at room temperature, it can be used as a preform for tailoring a preform in which a decrease in sealing performance due to shrinkage or deformation due to a high-temperature liquid to be filled is suppressed. It is possible to provide a crystallizer.

Furthermore, according to the present invention, there is provided a plastic bottle having heat resistance against a high-temperature liquid to be filled and sealed by a closing ring of a cap to be attached, wherein the closing ring includes at least an outer ring and has an open end. A mouth to which the cap is attached from the side, a shoulder connected to the support ring of the mouth, a body connected to the shoulder, and a bottom connected to the body, wherein the mouth is not circumferentially fixed. Since the open end side where the outer ring contacts continuously is crystallized, even if the mouth has a shape that is widely used as a standard for room temperature filling, it is caused by shrinkage and deformation due to the high temperature liquid to be filled. It is possible to provide a plastic bottle in which a decrease in sealing performance is suppressed.

Furthermore, according to the present invention, the mouth is provided with a cap from the side of the open end, and a body connected to a support ring of the mouth, and the mouth is formed from a non-crystalline preform and filled. A method for manufacturing a filled body in which a high-temperature liquid is filled in a plastic bottle having heat resistance to a high-temperature liquid to be performed, wherein the cap has at least an outer ring, and the outer ring contacts discontinuously in a circumferential direction. A step of heating the body of the preform in which the open end side is crystallized; a step of blow molding a plastic bottle from the preform using a mold; a step of filling the plastic bottle with a high-temperature liquid; A process of attaching a cap to the mouth of the bottle, a process of disinfecting the mouth and cap of the plastic bottle by overturning, and cooling the plastic bottle Production of a filling body in which the mouth portion has a shape that is widely used as a standard for filling at room temperature, and a decrease in sealing performance due to shrinkage and deformation due to the high-temperature liquid to be filled is suppressed. A method can be provided.

  Further, a step of heating the body, a step of blow-molding the plastic bottle, a step of filling the liquid, a step of attaching the cap, a step of overturning and sterilizing the mouth and the cap, and cooling the plastic bottle Since the process and all steps are performed in an in-line manner, even if the mouth is a shape that is widely used as a standard for room temperature filling, a decrease in sealing performance due to shrinkage or deformation due to the high temperature liquid to be filled was suppressed. A method for producing a filled body can be provided.

FIG. 1 is a front view illustrating an example of a preform according to an embodiment. It is the fragmentary sectional view which showed the state where the screw-in type cap was attached to the mouth part. It is the principal part longitudinal cross-sectional view which illustrated the crystallization apparatus of the preform. FIG. 4 is a sectional view (transverse sectional view) taken along line IV-IV of FIG. 3. FIG. 1 is a front view showing a PET bottle as an example of a plastic bottle according to the embodiment. It is the schematic diagram which showed the manufacturing apparatus of the filling body concerning this embodiment typically. It is sectional drawing which showed an example of the heating device of the preform. It is sectional drawing which showed the preform and the PET bottle after blow molding typically. It is a flow chart showing an outline of a manufacturing process of a filling body according to the present embodiment. FIG. 3 is a schematic view illustrating an example of blowing cooling air to a PET bottle. It is a flow chart showing an outline of a manufacturing process of a filling body according to another embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the configuration of a preform 1 (preformed body) according to the present embodiment for molding a plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be mounted is described in detail. Will be described. FIG. 1 is a front view showing an example of a preform 1 according to the present embodiment. In the following, for convenience of description, the mouth 10 of the preform 1 in the state of FIG. 1 in which the open side at one end of the preform 1 faces upward is referred to as the upper side.

  The preform 1 according to the present embodiment has a bottomed cylindrical shape with one end side opened, and includes a mouth part 10 on the open side and a body part 15 on the bottom side. The mouth 10 has an annular open end 11 at its upper end and an annular support ring 12 projecting outward at its lower end.

  An external thread 13 (screw) for attaching a cap (not shown) after the preform 1 is formed into a bottle shape by a blow molding machine (not shown) is provided on the outer periphery of the mouth portion 10. Further, the mouth portion 10 has an annular fogger 14 projecting outward between the support ring 12 on the outer periphery thereof and the male screw 13. Note that the support ring 12 protrudes outward from the fogger 14.

  The shape of the opening 10 does not change even after being formed by the blow molding machine. On the other hand, the body portion 15 is a cylindrical portion that expands to have a bottle shape during blow molding. The trunk 15 has a neck 16 connected to the mouth 10 (the lower surface of the support ring 12), a torso 17 connected to the neck 16, and a bottom 18 to be connected to the torso 17.

  The neck portion 16 is formed in, for example, an inverted truncated cone shape whose diameter is reduced from the side of the mouth portion 10 to the side of the mid-body portion 17. That is, the trunk diameter at the lower end of the neck 16 is smaller than the trunk diameter at the upper end of the neck 16 (immediately below the support ring 12). Further, the neck portion 16 may be configured to increase in thickness from the side of the mouth portion 10 toward the side of the middle portion 17 from the viewpoint of improving blow moldability. That is, the thickness at the lower end of neck 16 may be greater than the thickness at the upper end of neck 16.

  The body diameter and the wall thickness of the middle body 17 have a substantially true cylindrical shape that hardly changes in the vertical direction. However, the middle portion 17 may be provided with a draft, which is a slope for facilitating removal from a mold used for manufacturing the preform 1 by injection molding. The wall thickness may slightly change in the vertical direction.

  The bottom part 18 is formed in a substantially hemispherical shape curved outward. The bottom 18 may have a conical shape, a cylindrical shape with rounded corners, or another shape. A solidified portion attached to an inlet (gate) of the molten resin when the preform 1 is manufactured by injection molding adheres to the bottom portion 18. FIG. 1 shows a form after the part is cut off.

  Note that the distance from the lower surface of the support ring 12 to the lower end of the bottom 18 is the height H1 of the body 15. Further, the outer diameter of the middle portion 17 is the outer diameter D1 of the body portion 15. The height H1 of the body 15 is preferably 50 mm or more and 90 mm or less. Further, the outer diameter D1 of the trunk portion 15 is preferably 16 mm or more and 25 mm or less.

  Examples of the material of the preform 1 include polyolefins such as high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polypropylene, and ethylene-vinyl alcohol copolymer, and polylactic acid obtained from plants and the like. Various plastics that can be blow molded can be used. However, it is preferable that the preform 1 is mainly composed of polyester such as polyethylene naphthalate, particularly polyethylene terephthalate. In the resin described above, various additives, for example, a coloring agent, an ultraviolet absorber, a release agent, a lubricant, a nucleating agent, an antioxidant, and an antistatic agent, as long as the quality of the molded article is not impaired. Can be blended.

  As an ethylene terephthalate-based thermoplastic resin constituting the preform 1, ethylene terephthalate units occupy most of the ester repeating part, generally 70 mol% or more, and have a glass transition point (Tg) of 50 ° C. or more and 90 ° C. or less. The one having a melting point (Tm) in the range of 200 ° C. or more and 275 ° C. or less is preferable. As an ethylene terephthalate-based thermoplastic polyester, polyethylene terephthalate is particularly excellent in terms of pressure resistance and the like, but in addition to ethylene terephthalate units, is composed of a dibasic acid such as isophthalic acid or naphthalenedicarboxylic acid and a diol such as propylene glycol. Copolyesters containing small amounts of ester units can also be used.

  Polyethylene terephthalate has the largest production among thermoplastic synthetic resins. The polyethylene terephthalate resin has various properties such as excellent heat resistance, cold resistance, chemical resistance, and abrasion resistance. Furthermore, polyethylene terephthalate resin has a lower proportion of petroleum in its raw material than other plastics, and can be recycled. As described above, according to the configuration containing polyethylene terephthalate as a main component, a material with a large production amount can be used, and various excellent characteristics thereof can be utilized.

  Polyethylene terephthalate is obtained by condensation polymerization of ethylene glycol (ethane-1,2-diol) and purified terephthalic acid. As the polymerization catalyst for polyethylene terephthalate, it is preferable to use at least one of a germanium compound, a titanium compound, and an aluminum compound. By using these catalysts, it is possible to form a container having higher transparency and excellent heat resistance than using an antimony compound.

  The preform 1 is formed by, for example, injection molding a pellet-shaped polyethylene terephthalate as a main raw material. For injection molding, an injection molding apparatus including a hopper dryer, a hopper, a heating cylinder, a screw, a mold, a cooler, and the like is used. The preform 1 is formed from polyethylene terephthalate in the form of pellets through the steps of drying, plasticizing, injection, pressing, and cooling.

  Note that the preform 1 may be composed of multiple layers. At least one of the layers may have a barrier layer or an oxygen absorbing layer. For the barrier layer, for example, polyamide or ethylene-vinyl alcohol copolymer is used. As the oxygen absorbing layer, a layer containing a combination of an oxidizable organic component and a transition metal catalyst, or a gas barrier resin that does not substantially oxidize is used. An oxygen permeation preventing function can be provided by such a barrier layer or an oxygen absorbing layer.

  In addition, even when the preform 1 is composed of a single layer, for example, polyamide as the oxygen removing compound may be mixed with polyethylene terephthalate. With such a configuration, even if it is a single layer, an oxygen permeation preventing function can be provided. The same applies to other characteristics such as ultraviolet shielding properties.

  A cap is attached to a plastic bottle molded into a bottle from the preform 1 according to the present embodiment. Therefore, next, the configuration of the cap attached to the mouth 10 will be described in detail. FIG. 2 is a partial cross-sectional view showing a state in which a screw-in type cap 60 is attached to the mouth portion 10. A plastic bottle, for example, a PET bottle 2 is hermetically sealed by mounting the cap 60 around the mouth portion 10 by being tightly wound. In addition, as the material of the cap 60, polypropylene, high-density polyethylene, or the like is used.

  The cap 60 includes a cap body 61 located on the upper side when the cap 60 is attached to the mouth portion 10, and a peeling ring 70 located on the lower side. The release ring 70 has a ring shape. The release ring 70 includes a plurality of flaps 71 protruding inward and upward from an inner peripheral surface thereof. The flap 71 falls down on the inner circumference side of the peeling ring 70 when the cap 60 is wound around the mouth portion 10 until the PET bottle 2 is in an initial sealed state, and after the flap 71 gets over the fogger 14, the peeling ring It is configured to be away from the inner circumference of the 70. The cap body 61 and the peeling ring 70 are connected via a connecting member 72 that is configured to be breakable when the cap 60 is initially opened.

  The flap 71 at the time of the initial sealing is arranged between the fogger 14 and the support ring 12. When the cap 60 is turned in the opening direction, the upper end of the flap 71 hits the fogger 14 and the upward movement of the peeling ring 70 is prevented. Further, when the cap 60 is turned, the connecting member 72 is broken, and the cap body 61 and the peeling ring 70 are separated. Then, the cap body 61 is removed from the opening 10 with the peeling ring 70 remaining between the fogger 14 and the support ring 12. As described above, the cap 60 has a tamper-evident preventing function, that is, a so-called tamper-evident property, which makes it possible to see at a glance whether or not the initial opening has been performed.

  The cap main body 61 has a disk-shaped upper part 62 and a cylindrical body part 63 hanging down from the periphery of the upper part 62. The body 63 has a female screw 64 that engages with the male screw 13 of the mouth 10 on the inner peripheral surface. The cap 60 has a closing ring that seals the PET bottle 2 in close contact with the mouth portion 10. FIG. 2 shows an example in which the closing ring is constituted by an inner ring 65, a contact ring 66, and an outer ring 67 which are annularly suspended from the inner surface of the upper portion 62 in order from the radially inner side of the cap 60. I have.

  The inner ring 65 has, on its outer peripheral surface, a protruding portion that protrudes outward from the cap 60, and the protruding portion of the inner ring 65 contacts the inner peripheral surface 10 a of the opening 10. The lower end of the contact ring 66 contacts the open end 11 of the mouth 10. The outer ring 67 has, on its inner peripheral surface, a protruding portion that protrudes inward of the cap 60, and the protruding portion of the outer ring 67 contacts the outer peripheral surface 10 b of the mouth portion 10. And the sealing of the PET bottle 2 is maintained by these three contact points. In addition, the PET bottle 2 can be sealed if at least one of the three locations described above is provided with the closing ring. However, as illustrated in FIG. 2, by providing the inner ring 65, the contact ring 66, and the outer ring 67, more reliable sealing can be realized.

  The polyethylene terephthalate as a main raw material constituting the preform 1 has a mixture of a crystal region portion (crystal portion) in which a molecular chain is crystallized and an amorphous region portion (amorphous portion) which is not crystallized. Polyethylene terephthalate, the amorphous part has a glass transition temperature of about 70 ° C. or more having fluidity, and the crystalline part is also heated at about 260 ° C. or less of the melting point of flowing, particularly 140 ° C. or more, when heated at about 160 ° C. or less, It has the property that the orientation of molecular chains occurs and the ratio of crystal parts increases. Such a crystal part with respect to the sum of the crystal part and the amorphous part is called crystallinity. Then, the higher the crystallinity, the stronger the intermolecular force, so that the heat resistance is improved.

  Note that since the crystal part has a higher density than the amorphous part, the higher the crystallinity, the higher the density. That is, polyethylene terephthalate has the property that the higher the density, the higher the heat resistance. Further, since the amorphous portion and the crystal portion have different refractive indices, scattering occurs at these boundaries. Therefore, as the number of crystal portions increases, light is liable to be scattered, and haze (of the transmitted light in the visible light region) increases. Scattered light). That is, polyethylene terephthalate has the property that the higher the haze, the higher the heat resistance.

  On the other hand, polyethylene terephthalate undergoes a heat treatment to cause shrinkage and deformation, which becomes more pronounced as the crystallinity becomes lower. Therefore, from the viewpoint of maintaining the shape and dimensions of the preform 1, it is preferable that the portion where the heat treatment is performed is reduced as much as possible.

  The mouth 10 keeps the PET bottle 2 sealed by contact with the inner ring 65, the contact ring 66, and the outer ring 67. If the contact portion of the mouth portion 10 with the inner ring 65 or the like is deformed, the sealing of the PET bottle 2 cannot be maintained depending on the degree of the deformation. Therefore, it is required that the mouth 10 is not particularly deformed by the heat of the high-temperature liquid filled in the contact portion with the inner ring 65 or the like. On the other hand, a high heat resistance is not required in a portion of the mouth portion 10 away from the contact portion with the inner ring 65 or the like, and further, shrinkage or deformation due to the heat treatment is not generated as much as possible. Is desired. For example, when the external thread 13 contracts due to heat, the engagement of the external thread 13 with the internal thread 64 of the cap 60 becomes poor, and the external thread 13 is easily loosened. Furthermore, since the support ring 12 side is thicker than the open end 11, the heat resistance is originally stronger.

  From the above, the preform 1 according to the present embodiment has a haze value between the side of the opening end 11 including the contact portion with the inner ring 65, the contact ring 66, and the outer ring 67, and the side of the support ring 12. In contrast, the haze value of the opening end 11 is higher than that of the support ring 12. Thereby, the heat resistance of the PET bottle 2 molded from the preform 1 can be particularly enhanced on the side of the open end 11. It is more preferable that the difference in the haze value between the side of the opening end 11 and the side of the support ring 12 is 0.5% or more and 30% or less. By providing such a difference in the haze value, it is possible to achieve a sufficient heat resistance while minimizing a change in dimension on the side of the opening end 11. Furthermore, since crystallization is performed to a stage at which it can be visually confirmed, it is possible to determine the state of crystallization based on, for example, color, and more easily after the production line of the preform 1. The quality of heat resistance can be controlled.

  The haze value was determined by the method described in “JIS K 7136: 2000 Determination of haze of plastic-transparent material” using, as a sample, a cut piece obtained by cutting a part of the side of the opening end 11 and a part of the side of the support ring 12 into, for example, 3 mm square. It can be measured by a compliant method, for example an ultraviolet-visible-near-infrared spectrophotometer with an integrating sphere unit. By measuring the haze value on the side of the open end 11 and the haze value on the side of the support ring 12, it can be determined whether or not the preform 1 is the preform 1 according to the present embodiment. The haze value is preferably measured in a state where the surface roughness on the side of the opening end 11 and the side of the support ring 12 are adjusted.

  Here, the side of the opening end 11 may include a contact portion of the mouth portion 10 with the inner ring 65 or the like. In particular, it is important that the side wall portion of the mouth portion 10 is included. FIG. 1 shows a vertical length a on the opening end 11 side and a vertical length b on the support ring 12 side. More specifically, the side of the open end 11 may be an area having a length a of up to 5 mm from the open end 11 toward the support ring 12. In many cases, the position where the mouth 10 contacts the inner ring 65 is about 2 mm to 3 mm from the side of the opening end 11. Therefore, if the heat resistance of the region where the length a is up to 5 mm from the opening end 11 toward the support ring 12 is increased, the contact of the mouth 10 with the inner ring 65 or the like due to the heat of the high-temperature liquid to be filled. The portion is not deformed, and the sealing of the PET bottle 2 is maintained.

  In the preform 1 according to the present embodiment, the mouth portion 10 at the stage when formed by injection molding or the like is amorphous. Therefore, the opening 10 only needs to be partially crystallized on the side of the opening end 11 and amorphous on the side of the support ring 12. According to the preform 1 according to the present embodiment configured as described above, it is possible to reduce the range in which measures for shrinkage and deformation are required during the heat treatment.

  At the stage of the preform 1, the opening 10 whose opening end 11 has a higher haze value than the support ring 12 does not change its shape even after being molded into the PET bottle 2. The shape of the mouth portion 10 is such that the fitting property with the cap 60 which is widely used as a standard, the suitability for transporting the PET bottle 2 by a molding device, a filling device, and the like, and the strength required at the time of transporting and filling, etc. Designed with consideration.

  Therefore, the outer diameter (corresponding to the root diameter D2 of the male screw 13 (see FIG. 1)), the inner diameter, the peak diameter D3 of the male screw 13 and the height of the mouth portion 10 of the preform 1 according to the present embodiment are, for example, It is preferred that the dimensions be those used as standard in beverage bottles. At this time, it is particularly preferable that the mouth portion 10 is formed without being changed from a dimension widely used as a standard for room temperature filling. With this, a mold for molding the preform 1 according to the present embodiment having heat resistance can be shared by utilizing the mold for filling at room temperature, so that the efficiency can be improved and a new one can be obtained. Since no mold is required, costs can be reduced.

  The opening 10 may have a size corresponding to, for example, the Plastic Closure Only (PCO) 1810 standard or the PCO1881 standard. More specifically, the outer diameter of the mouth portion 10 (the root diameter D2 of the male screw 13) is preferably 24.94 mm ± 0.13 mm. Further, the inner diameter of the mouth 10 is preferably 21.74 mm ± 0.13 mm. Further, the thread diameter D3 of the male screw 13 is preferably 27.43 mm ± 0.13 mm. Further, the height of the mouth 10 is preferably 21.00 mm ± 0.25 mm (PCO1810 standard) or 17.00 mm ± 0.25 mm (PCO1881 standard). The height of the mouth 10 is the distance from the lower surface of the support ring 12 to the upper end of the mouth 10. Further, in consideration of the fitting property with the normal temperature filling cap 60, the root diameter D2 of the male screw 13 is preferably 26 mm or less.

Next, the configuration of the apparatus for crystallizing the preform 1 according to the present embodiment will be described in detail. FIG. 3 is a longitudinal sectional view of a main part illustrating a crystallization apparatus 90 of the preform 1, and FIG. 4 is a sectional view (transverse sectional view) taken along line IV-IV of FIG. The crystallization device 90 includes at least a holder 91 that holds the mouth 10 of the preform 1 and a heat treatment unit 92 that heats the mouth 10. The crystallization apparatus 90 performs heat treatment to partially crystallize the opening end 11 side in the mouth 10 of the preform 1.

  The holder 91 illustrated in FIGS. 3 and 4 has, for example, an annular groove 91 a corresponding to the outer diameter and the inner diameter of the opening 10 according to the PCO1810 standard. The groove 91a is configured so that the side of the opening end 11 of the preform 1 enters. The groove 91a has a depth at which at least a region where the mouth portion 10 comes into contact with the inner ring 65 (see FIG. 2) enters, preferably 5 mm from the side of the opening end 11 (length of the side of the opening end 11). A corresponding depth). The holder 91 has a male screw 13 and a groove 91 a formed in a shape corresponding to the opening end 11 side of the male screw 13, that is, a groove 91 a formed to a finished dimension of the preform 1.

  The heat processing section 92 is configured to heat the side of the opening 10 on the side of the opening end 11. The heat treatment section 92 is configured by, for example, embedding a heater in the holder 91. As the heater, for example, a silicon rubber heater may be used. The heat treatment unit 92 illustrated in FIG. 3 is provided at a position along the outer peripheral surface 10b of the mouth 10.

  In addition, as shown in FIG. 4, it is more preferable that the heat treatment units 92 are arranged discontinuously in the circumferential direction of the opening end 11. Since the heat treatment section 92 is discontinuously arranged, it is possible to prevent simultaneous deformation in the entire circumferential direction when the side of the opening end 11 is subjected to the heat treatment. As a result, the deformation due to the heat treatment is effectively prevented. Can be suppressed. Further, when the heat treatment sections 92 are arranged discontinuously in the circumferential direction, it is particularly preferable that the number is eight. Since the number of the heat treatment portions 92 is eight, a uniform and uniform heat treatment can be performed, and deformation due to the heat treatment can be more effectively suppressed.

  In the crystallization apparatus 90, the heater heated to, for example, about 160 ° C. to 180 ° C. by the heat treatment unit 92 contacts the opening end 11 to heat the region on the opening end 11 side and partially crystallize. It is configured to be.

  On the other hand, the groove 91a of the holder 91 prevents the expansion when the area near the open end 11 is heated and the subsequent contraction and deformation on both the outer peripheral side and the inner peripheral side of the preform 1. It is configured so that it can be suppressed.

  As described above, the crystallization device 90 heats the region on the side of the opening end 11 by the heat treatment unit 92 to partially crystallize the region, and the holder 91 contracts the region on the side of the opening end 11 due to heating. And the deformation is suppressed so that the dimensional change falls within an allowable range. Therefore, according to the present embodiment, even if the mouth portion 10 has a shape that is widely used as a standard for filling at room temperature, a decrease in sealing performance due to shrinkage or deformation caused by the filled high-temperature liquid is suppressed. A preform 1 crystallization apparatus 90 for tailoring the preform 1 can be provided.

  The crystallization apparatus 90 may further be provided with a heat insulating material 93 in order to locally limit the portion of the preform 1 to be heated on the side of the opening end 11. The heat insulating material 93 may be provided, for example, so as to be stacked on the holder 91, and is arranged between the side of the open end 11 and the side of the support ring 12, particularly, in the vicinity of the male screw 13. And good. Further, as illustrated in FIG. 3, when the heat treatment unit 92 is provided along the outer peripheral surface 10 b of the mouth 10, the heat insulating material 93 is provided on the inner peripheral surface 10 a of the mouth 10 and the open end. 11 may be provided. As the heat insulating material 93, a material having excellent heat resistance and compressive strength is selected. As the heat insulating material 93, for example, a material obtained by impregnating a glass fiber with a thermosetting resin and then heating and pressing in a plate shape may be used.

  The crystallization device 90 may further be provided with a cooling device 94 in order to limit the heating range of the preform 1. The cooling device 94 is configured to cool the periphery of the heated mouth 10, especially on the side of the support ring 12. The cooling device 94 illustrated in FIGS. 3 and 4 includes, for example, a cool air generator 94a that cools the heat transfer medium, a blower (not shown) that sends out the cool air ac cooled by the cool air generator 94a, A cool air introduction passage 94b through which the cool air ac guided to the inner peripheral side passes is formed.

  The cool air introduction passage 94b is formed at the center of the holder 91 in plan view. The cool air introduction flow path 94b is formed at a position corresponding to the inner periphery of the opening end 11 when the preform 1 is installed on the holder 91 and extends along the axial direction of the preform 1.

  That is, the crystallization device 90 is configured such that the cool air ac cooled to, for example, about 0 ° C. by the cooling device 94 passes through the cool air introduction flow path 94b and contacts the inner peripheral side of the opening 10 to support the support ring. The 12 side is configured to be cooled. It is configured such that the center of the holder 91 is prevented from being heated by the cool air ac passing through the cool air introduction flow path 94b. Then, the region on the side of the opening end 11 is configured not to be excessively heated through the holder 91. Therefore, the cooling device 94 has a function of preventing the preform 1 from contracting and deforming due to heating by the heat treatment unit 92.

  Note that the heat treatment unit 92 is provided on the inner periphery side of the preform 1, and the cooling device 94 is provided on the outer periphery side of the preform 1, and the arrangement of the heat treatment unit 92 and the cooling device 94 is reversed. It does not matter if it is. Further, the cooling device 94 may be configured by a so-called chiller, and the heat transfer medium may be circulated in the center of the holder 91. Note that the heat transfer medium of the cooling device 94 may be circulated on the support ring 12 side of the heat insulating material 93.

  The crystallization device 90 may be configured in an in-line manner between the preform 1 molding device and the PET bottle 2 molding device. In particular, the crystallization device 90 is inline with the preform 1 molding device. It is preferable to be configured in a system. The crystallization device 90 may be incorporated in a preform 1 forming device.

  Next, a method for manufacturing the preform 1 according to the present embodiment will be described in detail. First, the preform 1 is formed by, for example, injection molding in a state where the mouth portion 10 is in an amorphous state. Then, from this state, the preform 1 is heated by the crystallization device 90 so that the haze value of the opening end 11 side is higher than that of the support ring 12 side. More specifically, the preform 1 is attached to the holder 91 by being pushed into the groove 91a of the crystallization device 90. The open end 11 side of the preform 1 attached to the crystallization device 90 is fixed to a holder 91 having a groove 91 a formed to the finished dimension of the preform 1.

  In this state, the heater applied from the outer peripheral side of the opening end 11 is heated to, for example, 180 ° C. The crystallizer 90 has a haze value higher on the side of the open end 11 including the contact portion with the inner ring 65, the contact ring 66, and the outer ring 67 (see FIG. 2) than on the side of the support ring 12. Heat treatment. Crystallization proceeds on the side of the open end 11 heated by the heater. At this time, although shrinkage and deformation occur on the side of the open end 11, a change in the dimension from the side of the open end 11 to the periphery of the male screw 13 is within an allowable range because it is fitted in the groove 91 a. On the other hand, since the side of the support ring 12 is not heated, no shrinkage or deformation occurs, and no crystallization occurs.

  In addition, as shown in FIG. 4, it is more preferable that the side of the opening end 11 is heat-treated discontinuously in the circumferential direction. By performing the heat treatment discontinuously in the circumferential direction on the side of the open end 11, the deformation in the entire circumferential direction is prevented at the same time. As a result, the deformation due to the heat treatment can be effectively suppressed. . Further, it is particularly preferable to perform heat treatment at eight locations in the circumferential direction. By performing the heat treatment at eight locations, a uniform and uniform heat treatment can be performed, and deformation due to the heat treatment can be more effectively suppressed.

  In this way, a preform for molding the PET bottle 2 having heat resistance to the filled high-temperature liquid and sealed by the inner ring 65, the contact ring 66, and the outer ring 67 of the cap 60 to be mounted. 1 can be manufactured.

  Here, in a crystallization port that is frequently used for hot filling, a mold is often manufactured in a design in which a contraction during crystallization is included in advance. On the other hand, a non-crystallized opening frequently used for filling at room temperature can be made to have a certain degree of heat resistance by increasing its thickness, but there is a limit to this. Deformation to the inner or outer periphery near the surface, that is, leakage from this portion is particularly problematic. Furthermore, the larger the thickness of the non-crystallization port, the more difficult it is to engage with the cap 60. On the other hand, in the preform 1 according to the present embodiment, since the mouth portion 10 is crystallized from a non-crystalline state, the non-crystallized mouth and the mold can be shared, which is efficient. Furthermore, in the preform 1 according to the present embodiment, high-temperature filling can be performed by using the widely used non-crystallization port cap 60 by suppressing the dimensional change of the port 10 to a certain value or less.

  When the side of the open end 11 of the preform 1 is heated by the crystallization device 90, it is more preferable that the space between the side of the open end 11 and the side of the support ring 12 be insulated. For example, the heat insulating material 93 provided between the side of the opening end 11 and the side of the support ring 12 transmits heat applied from the heat treatment section 92 to the side of the opening end 11 to the side of the support ring 12. To prevent that. Therefore, by providing the heat insulating material 93, the heated portion of the preform 1 can be locally limited on the side of the opening end 11.

  Further, when the side of the open end 11 of the preform 1 is heated by the crystallization device 90, it is more preferable that the vicinity of the side of the support ring 12 is cooled. For example, a cooling device 94 provided at the center of the holder 91 cools the support ring 12 side. Then, the heat treatment section 92 is prevented from excessively heating the side of the opening end 11 through the holder 91. Therefore, the provision of the cooling device 94 can locally limit the heated range of the preform 1 on the side of the opening end 11. It is more preferable to cool the vicinity of the support ring 12 in advance before the side of the opening end 11 is heated in order to locally limit the heating range to the side of the opening end 11.

  Here, as a method of performing the heat treatment on the side of the opening end 11 of the preform 1, a method of performing a direct heat treatment with a heater is exemplified, but it is sufficient that the side of the opening end 11 is partially subjected to the heat treatment. Is not limited. For example, a method of supplying hot air, a method of radiant heat of an infrared lamp, or a method of immersion in an oil bath may be used. Further, a method using high-frequency dielectric heating may be used.

  Next, the configuration of the plastic bottle formed in the method for manufacturing a filler according to the present embodiment will be described in detail. FIG. 5 is a front view showing a PET bottle 2 as an example of the plastic bottle according to the present embodiment. The PET bottle 2 illustrated in FIG. 5 is a square bottle having a substantially square cross section in the horizontal direction. The PET bottle 2 has a mouth part 10, a shoulder part 20, a trunk part 30, and a bottom part 40. As described above, the configuration of the mouth 10 of the PET bottle 2 is the same as the configuration of the mouth 10 of the preform 1. The mouth 10 of the PET bottle 2 is in a partially crystallized state. That is, the opening 10 of the mouth portion 10 of the PET bottle 2 has a higher haze value than the support ring 12.

  The shoulder 20 has an upper side connected to the lower surface of the support ring 12 of the mouth 10, while a lower side connected to the trunk 30. The shoulder portion 20 has a shape of a truncated quadrangular pyramid whose diameter increases from above to below. The shoulder portion 20 preferably has a straight portion 21 having a length L extending vertically from a connection end with the body portion 30. The shape of the shoulder portion 20 having the straight portion 21 can improve the shapeability.

  The body portion 30 has a substantially square tube shape as a whole, with four wall portions 31 having the same shape connected in the circumferential (horizontal) direction. Each of the wall portions 31 includes a pressure absorbing panel 32 that is recessed inward by one step. The pressure absorbing panel 32 has a function of absorbing a change in pressure inside the PET bottle 2, particularly a change in reduced pressure, and maintaining a strength of the PET bottle 2, particularly, a side wall strength which is a strength withstanding a horizontal load of the body 30. Having.

  The pressure absorbing panel 32 has a stepped wall surface 33 that is recessed inward by one step from the surface of the surrounding wall portion 31, and is further recessed inwardly from the stepped wall surface 33, and is formed between the opposite sides of the stepped wall surface 33. And a plurality of concave ribs 34 (ribs) extending in the vertical direction. Further, an inclined surface surrounding the step wall surface 33 and inclined with respect to the step wall surface 33 is formed. The wall portion 31 and the step wall surface 33 are connected by an inclined surface.

  The step wall surface 33 constituting the pressure absorbing panel 32 is curved inward in the PET bottle 2 from the left and right ends toward the center in the horizontal direction. On the other hand, even in the vertical direction, the PET wall 2 may be curved inward from the upper and lower ends of the step wall surface 33 toward the center. With this configuration, even if the PET bottle 2 becomes positive pressure, the step wall surface 33 of the pressure absorbing panel 32 does not deform until it becomes vertical, and then becomes inward when the PET bottle 2 becomes negative pressure. It can be made to exhibit a behavior of bending. As described above, it is preferable that the step wall surface 33 is configured to be sealed after being filled with the high-temperature liquid, and to maintain the inward curvature until cooled to room temperature.

  The surface of the step wall 33 has a concave rib 34 extending continuously from the left end to the right end of the step wall 33. The number of the concave ribs 34 is preferably designed to be appropriate. In the example of FIG. 5, nine concave ribs 34 are arranged at equal intervals over the entire area in the vertical direction from the upper end to the lower end of the step wall surface 33. By appropriately arranging the concave ribs 34, the reduced pressure absorbing function can be sufficiently exhibited, and the effect of dispersing the stress applied to the PET bottle 2 and reinforcing the PET bottle 2 can be sufficiently obtained. .

  Although the depth of the concave rib 34 may be constant, it is preferable that the concave rib 34 be formed so as to be deeper from both left and right ends toward the center. According to the configuration in which the concave rib 34 is deepest in the center, it is possible to prevent the positive pressure from easily protruding outside the PET bottle 2.

  The PET bottle 2 has a slight oxygen permeability. When the storage in the PET bottle 2 is performed for a long period of time, oxidation occurs depending on the content, and the pressure in the PET bottle 2 is reduced. In addition, the pressure inside the PET bottle 2 changes depending on the temperature difference between the time of filling the contents and the time of storage. The PET bottle 2 in which the pressure has been reduced is pulled inward and deformed. At this time, the pressure absorbing panel 32 is easily deformed inward by extending the uneven surface of the step wall surface 33 and the concave rib 34. The pressure absorbing panel 32 plays a role of preventing the entire PET bottle 2 from being deformed by being recessed inside the PET bottle 2 when the pressure inside the PET bottle 2 is reduced. That is, the pressure absorbing panel 32 is configured so as not to protrude outside the wall 31 of the PET bottle 2 but to be recessed to some extent inward.

  The pressure absorbing panel 32 plays a role in preventing the entire PET bottle 2 from being deformed even when the pressure inside the PET bottle 2 is increased. With the pressure absorbing panel 32 having such a configuration, when the PET bottle 2 is opened, it is possible to prevent the wall of the PET bottle 2 from being pressed inward and the contents from being pushed out from the mouth 10 and spilling. . And the pressure absorption panel 32 can increase the rigidity of the trunk | drum 30.

  The wall portion 31 of the PET bottle 2 is a portion where a label is attached. The label is attached, for example, by a shrink label that shrinks by applying heat to a heat-shrinkable film such as a cylindrical polystyrene (PS: PolyStyrene) or polyethylene terephthalate covered on the PET bottle 2. Since the dimensions of the tubular heat-shrinkable film are determined at a predetermined value, if the wall portion 31 is swollen, the heat-shrinkable film may be clogged or may not enter.

  However, by providing the pressure absorbing panel 32, the protrusion of the wall portion 31 to the outside is prevented, the label can be mounted smoothly, and the productivity can be improved. Further, by providing the pressure absorbing panel 32, it is possible to maintain a good appearance of the product in which the contents are filled in the PET bottle 2, and to prevent a decrease in the value of the product.

  As described above, although it is more preferable that the pressure absorbing panel 32 includes the plurality of concave ribs 34 extending in the horizontal direction in that pressure is dispersed, a concave or convex shape extending in an arbitrary direction is not shown. It may have a rib.

  Further, in the case of a convex rib, it is preferable that the rib is designed so that the convex portion of the rib does not protrude outward from the surface of the wall portion 31 when the PET bottle 2 is under positive pressure. Therefore, when the PET bottle 2 is under a positive pressure, when the PET bottle 2 is viewed from just beside the projecting direction of the convex rib, the convex rib is not seen. The rib configured in this manner does not affect the dimensions of the facing surface of the PET bottle 2. Therefore, the PET bottle 2 according to the present embodiment is excellent in the loading efficiency of packing in a cardboard or the like. Further, the PET bottle 2 according to the present embodiment also has an effect of not affecting the mounting of the shrink label.

The PET bottle 2 preferably has an annular lateral groove 35 that crosses the wall 31 above and below the pressure absorbing panel 32. The lateral groove 35 has a function of improving the strength of the side wall. In addition, the lateral groove 35 can also be used for positioning at the time of mounting the label.

  On the other hand, if there is at least one horizontal reinforcing rib such as the lateral groove 35, that serves as a cushion, and the load in the vertical direction does not buckle but increases displacement. Then, the buckling strength, which is the strength to withstand the vertical load in the range where the displacement is small, decreases. Therefore, when the horizontal groove 35 is formed, the PET bottle 2 preferably has a vertical groove 36 extending in the vertical direction between the adjacent wall portions 31. The vertical groove 36 improves the buckling strength of the trunk 30. At least one vertical groove 36 is formed in the same location. In some cases, two to three vertical grooves 36 may be formed at the same location. However, if the number of the vertical grooves 36 is too large, the irregularities increase, and the shapeability deteriorates. In addition, when the PET bottle 2 has a configuration having the lateral groove 35, it is preferable from the viewpoint of shapeability that the above-described straight portion 21 of the shoulder portion 20 is formed longer.

  The lowermost region of the body 30 is the heel 37. When the PET bottle 2 is formed from the preform 1, the heel portion 37 has a longer distance from the bottom 18 (see FIG. 1) of the preform 1 and the stretching ratio increases by that much, so that the heel portion 37 is thinned, It is a place that is easy to whiten.

  The upper part of the bottom part 40 continues below the trunk part 30. The bottom 40 has a bottom wall 41 and a dome 42. The substantially flat annular bottom wall 41 extends in a direction perpendicular to the body 30 and serves as a ground surface of the PET bottle 2. The dome 42 is configured to protrude inward (upward) of the PET bottle 2 from the bottom wall 41 on the inner periphery of the bottom wall 41, and has a function of improving the strength of the bottom 40. The dome 42 is preferably provided with a plurality of ribs (not shown) having a function of reinforcing the dome 42 in a radial manner when viewed from the bottom.

  The height h from the bottom wall 41 to the central portion 42c of the dome 42 may be designed to be maintained higher than the ground surface of the PET bottle 2 even if the dome 42 is deformed by heat. As a result, even if the PET bottle 2 is deformed, it is prevented from protruding outward from the bottom wall 41, and the rattling or falling of the PET bottle 2 can be prevented. Therefore, the filler can be manufactured in-line, with a good appearance, and it can be prevented that the transportability of the filler and the loading efficiency are reduced. Note that the configuration of the bottom portion 40 is not limited to the example shown in FIG.

  The distance from the lower surface of the support ring 12 to the bottom wall 41 at the lower end of the bottom 40 is the height H2 of the body 30. Further, a distance between a pair of opposite sides of the body 30 is defined as an outer diameter D <b> 4 of the body 30 of the PET bottle 2.

  The shape of the PET bottle 2, particularly below the support ring 12, is not limited to the example shown in FIG. 5 and the like, and is formed by blow molding the preform 1, and is not excessively deformed by heat and positive pressure. Any shape may be used as long as the shape can be absorbed and the shape of the bottle can be maintained, and for example, a round bottle may be used. Also, the shapes of the pressure absorbing panel 32, the horizontal groove 35, and the vertical groove 36 formed in the body 30 can be freely designed within a range in which the effect sufficiently functions.

  The PET bottle 2 according to the present embodiment is not limited by size, and can be applied to various sizes. For example, the volume of the PET bottle 2 may be 100 ml or more and 2000 ml or less. The overall height of the PET bottle 2 may be 100 mm or more and 300 mm or less, and the outer diameter D4 of the body 30 may be 30 mm or more and 80 mm or less. Furthermore, the PET bottle 2 according to the present embodiment can be suitably used for a lightweight bottle. The mass of the PET bottle 2 is preferably, for example, 20 g or more and 40 g or less for 1000 ml, and 15 g or more and 25 g or less for 500 ml.

  With the above configuration, even if the mouth portion 10 has a shape that is widely used as a standard for filling at room temperature, a PET bottle in which a decrease in sealing performance due to shrinkage or deformation due to a high-temperature liquid to be filled is suppressed. 2 can be provided.

  In addition, the PET bottle 2 having the mouth portion 10, the shoulder portion 20, the body portion 30, and the bottom portion 40 formed as described above, the content to be filled in the PET bottle 2, and the PET filled with the content The filler according to the present embodiment is configured by the cap 60 that seals the bottle 2.

  Next, an apparatus for manufacturing a filler according to the present embodiment will be described in detail. FIG. 6 is a schematic diagram schematically illustrating the manufacturing apparatus 100 of the filling body 80 according to the present embodiment. The heating device 100 for heating the body 15 of the preform 1 that has been subjected to the heat treatment so that the opening end 11 has a higher haze value than the support ring 12 has in the manufacturing apparatus 100 for the filling body 80 according to the present embodiment. A molding section for blow-molding the PET bottle 2 from the preform 1 using a mold, a filling section for filling the PET bottle 2 with a high-temperature liquid, and a cap 60 attached to the mouth 10 of the PET bottle 2. A sterilization unit for overturning and sterilizing the opening 10 and the cap 60 of the PET bottle 2, and a cooling unit for cooling the PET bottle 2. The manufacturing apparatus 100 of the filling body 80 according to the present embodiment includes an apparatus for forming a PET bottle 2 from a preform 1 which is a preformed body, an apparatus for filling the PET bottle 2 with a high-temperature liquid, and the like. It is characterized by comprising.

  Here, the in-line system may be a (synchro) system in which a molding unit and a filling unit are connected, or a separate system in which the PET bottle 2 is air-conveyed while the molding unit and the filling unit are separated from each other. good. Further, among various apparatuses configured in an in-line system in the manufacturing apparatus 100 of the filling body 80 according to the present embodiment, an injection molding apparatus for forming the preform 1 or a crystal forming apparatus in which the open end 11 side of the preform 1 is crystallized. A crystallization device 90 for the preform 1 to be converted may be included.

  The bottle molding machine 110 has a heating device 111 as a heating unit and a biaxial stretch blow molding device 112 as a molding unit. When the preform 1 is formed into a bottle shape, first, the preform 1 is heated.

  FIG. 7 is a cross-sectional view illustrating an example of the heating device 111 of the preform 1. FIG. 7 shows a cross section in a direction perpendicular to the conveying direction of the preform 1.

  The heating device 111 includes a transfer device 113 and a heater 114. The conveying device 113 is configured to convey while rotating around the axis of the preform 1 in order to uniformly heat the body 15 of the preform 1 in the circumferential direction. The heater 114 is configured by a plurality of halogen lamps, for example, and is configured to heat the body 15 of the preform 1 to a temperature suitable for blow molding, for example, 115 ° C. or more and 135 ° C. or less. Further, the heating device 111 is for reflecting heat from the heater 114 to the body 15 of the preform 1 and for preventing the heat from the heater 114 from escaping to the outside of the heating device 111. A shielding member 116 and the like may be provided. In the heating device 111 of FIG. 7, the preform 1 is transported and heated with the opening 10 facing downward.

  FIG. 8 is a cross-sectional view schematically showing the preform 1 and the PET bottle 2 after blow molding. The biaxial stretch blow molding device 112 includes a mold 117, a stretch rod 118, an air supply device (not shown), and a control device that controls these devices. Although FIG. 8 illustrates the biaxial stretching blow molding apparatus 112 of the downward blow molding method, an upward blow molding method in which the material is hardly affected by gravity may be used.

  The mold 117 has a shape corresponding to the PET bottle 2 to be formed, and includes, for example, a body mold 117a that is formed in half corresponding to the body 30 and a bottom mold 117b corresponding to the bottom 40. Having. The surface temperature of the body mold 117a is controlled to be, for example, 90 ° C. or more and 125 ° C. or less, preferably 90 ° C. or more and 120 ° C. or less, and more preferably 90 ° C. or more and 115 ° C. or less. On the other hand, the temperature of the surface of the bottom mold 117b is controlled to be 5 ° C. or more and 30 ° C. or less. The temperature of the surface of the body mold 117a exceeds the glass transition point (Tg) of polyethylene terephthalate.

  By setting the surface temperature of the mold 117 to 120 ° C. or less, the material of the mold 117 is, for example, a stainless steel quenched and tempered steel having a large weight and a large work load in handling, and a steel material for the mold. Instead, aluminum can be used. By using aluminum, the processing of the mold 117 is facilitated, the degree of freedom in design is increased, and the manufacturing cost can be suppressed. In addition, since the weight of the mold 117 is reduced, the mold exchanging work becomes easy.

  It is preferable that the body mold 117a has a roughened surface portion 117R in which at least a part of the surface, more specifically, a portion that comes into contact with the heel portion 37 of the PET bottle 2 is roughened (roughened). The method for forming the rough surface portion 117R is not particularly limited, and may be a physical processing method such as sandblasting or polishing, or a chemical processing method such as etching. The heel portion 37 is a portion that is generally difficult to shape. This is particularly noticeable at the heating temperature of the preform 1 and the temperature of the surface of the body mold 117a set in the manufacturing apparatus 100 for the filling body 80 according to the present embodiment. However, since the rough surface portion 117 </ b> R is provided at a position in contact with the heel portion 37, mold release is improved, and local excessive shrinkage is prevented, and as a result, the shapeability of the PET bottle 2 is improved. .

  The stretching rod 118 is configured to be able to expand and contract inside the mold 117. The stretching rod 118 is configured to extend the body 15 of the preform 1 in which the mouth portion 10 is attached to the mold 117 in the longitudinal (axial) direction. The air supply device is configured to blow out the air P whose pressure and temperature are adjusted. The air P may be supplied to the inside of the preform 1 attached to the mold 117, and may be blown out from the stretching rod 118, or may be blown out from a member different from the stretching rod 118. The air P is configured to extend the trunk 15 of the preform 1 in the lateral (radial) direction. The air P blown out from the stretching rod 118 lowers the surface temperature of the body portion 15 to be rapidly cooled and improves heat resistance.

  As shown in FIG. 6, the hot filling machine 120 has a filler 121 as a filling unit and a capper 122 as a mounting unit. The filler 121 is configured to inject the hot liquid content, such as the beverage 50, which has been sterilized by heating at a high temperature, for example, 71 ° C. or more and 95 ° C. or less, more preferably 81 ° C. or more and 90 ° C. or less, into the PET bottle 2 as it is. Is configured. The capper 122 as a mounting unit is configured to mount the cap 60 on the mouth 10 of the PET bottle 2 filled with the beverage 50. In addition, the PET bottle 2 is sealed by the attached cap 60, and forms the filling body 80.

  The overturning sterilizer 130 as the overturning sterilization unit inclines the filling body 80 for a predetermined time, for example, 90 degrees or more for 30 seconds, and heats the hot beverage 50 to the inside of the filling body 80, particularly, the opening of the PET bottle 2. The unit 10 and the cap 60 are configured to be sterilized. The sterilization time is appropriately designed according to the type of the beverage 50 and the temperature.

  The pasterizer 140 as a cooling unit has, for example, four thermostatic baths for storing water at a plurality of temperatures as a heat exchange liquid, and an outlet such as a nozzle. The pasterizer 140 sprays high-temperature water, for example, 70 ° C. water to sterilize the filling body 80 from the outside, and then gradually lowers the temperature of the water to be sprayed. Water is sprayed to cool the filling body 80 (PET bottle 2). The cooling by the pasterizer 140 has an effect of preventing a change in flavor of the beverage 50 filled in the filling body 80. The temperature of the liquid stored in the first tank of the paster 140 is preferably 70 ° C. or lower. By rapidly cooling the filling body 80 at 70 ° C. or less, heat damage to the body 30 of the PET bottle 2 can be reduced.

  The manufacturing apparatus 100 of the filling body 80 includes a labeler, a caser 150, a printing device, an inspection device, and the like as a latter stage of these devices. Labeler attaches a label to the filling body 80 (PET bottle 2). The caser is for packing the packing bodies 80 into a cardboard box in a predetermined number, for example, every 24 packing bodies. The packing body 80 according to the present embodiment is manufactured using the above-described devices and the like.

  Next, a method for manufacturing the filling body 80 according to the present embodiment will be described in detail. FIG. 9 is a flowchart showing an outline of a manufacturing process of the filling body 80 according to the present embodiment. In the present embodiment, at least the step of heating the body portion 15 of the preform 1 that has been subjected to the heat treatment so that the haze value is higher on the side of the opening end 11 than on the side of the support ring 12; Blow molding the PET bottle 2 by using the method, filling the PET bottle 2 with the high-temperature beverage 50, attaching the cap 60 to the mouth 10 of the PET bottle 2, and removing the mouth 10 of the PET bottle 2. And a step of cooling the PET bottle 2 by overturning and sterilizing the cap 60 and the cap 60. The present embodiment is characterized in that all processes such as molding of the PET bottle 2 from the preform 1 and filling of the PET bottle 2 with the high-temperature beverage 50 are performed in an inline manner. Hereinafter, each step will be described in more detail.

  First, the preform 1 is supplied to the bottle forming machine 110 (step S1). Note that, as described above, the manufacturing apparatus 100 for the filling body 80 according to the present embodiment may include an injection molding apparatus, a compression molding apparatus, a compression injection molding apparatus, or the like that forms the preform 1 in an in-line system. good. In this case, the preform 1 to be supplied to the bottle molding machine 110 is formed by an injection molding apparatus in an inline method. The preform 1 is supplied to the bottle forming machine 110 by a cold parison method, a hot parison method, and an in-line method.

  Further, as described above, in the manufacturing apparatus 100 for the filling body 80 according to the present embodiment, the crystallization apparatus 90 that performs the heat treatment so that the haze value is higher on the side of the open end 11 than on the side of the support ring 12. May be configured in an in-line system. Note that the crystallization device 90 and the manufacturing device 100 for the filling body 80 may not be configured in an in-line system. Even in this case, the crystallization device 90 and the injection molding device that forms the preform 1 It is preferable to be configured in an in-line system. In the method of manufacturing the filling body 80 according to the present embodiment, the preform 1 in which the opening 10 is heated on the side of the opening end 11 by the crystallization device 90 from the non-crystalline state of the mouth 10 is used. The supplied preform 1 is transported after being aligned.

  Next, the preform 1 is heated (step S2). The body 15 of the preform 1 conveyed to the heating device 111 of the bottle forming machine 110 is heated by a plurality of heaters 114 to a temperature of, for example, 115 ° C. or more and 135 ° C. or less.

  If the temperature of the preform 1 to be heated is lower than 115 ° C., the heat resistance is insufficient, and the PET bottle 2 molded thereafter cannot cope with hot filling for filling high-temperature contents. , Deformed into an irregular shape. On the other hand, when the temperature of the preform 1 to be heated exceeds 135 ° C., the preform 1 before bottle molding is excessively crystallized and cannot be blow-molded. At that point, if the temperature of the preform 1 to be heated is 135 ° C. or lower, crystallization slightly proceeds, but blow molding is possible.

  Next, blow molding of the PET bottle 2 is performed by stretching the preform 1 (step S3). The heated preform 1 is mounted on a mold 117 of a biaxial stretch blow molding apparatus 112. In the manufacturing method of the filling body 80 according to the present embodiment, the temperature of the surface of the body mold 117a is 90 ° C or higher and 125 ° C or lower, preferably 90 ° C or higher, 120 ° C or lower, more preferably 90 ° C or higher and 115 ° C or lower. It is said. By setting the temperature in this range, the outer surface of the PET bottle 2, particularly the body 30, is crystallized, and a configuration having heat resistance is obtained. Therefore, in a later step, the PET bottle 2 that can be filled with the high-temperature beverage 50 can be manufactured. When the temperature of the surface of the body mold 117a is less than 90 ° C., the heat resistance is low. On the other hand, when the temperature of the surface of the body mold 117a exceeds 125 ° C., the PET bottle 2 is placed in the body mold 117a. The initial shrinkage upon contact with the surface becomes large, and deformation, that is, sink marks are likely to occur.

  Here, in the present embodiment, the effect is realized when the temperature of the preform 1 to be heated and the temperature of the surface of the body mold 117a both exceed a certain level. The temperature of the body 15 of the preform 1 is more preferably higher than the temperature of the surface of the body mold 117a. When the temperature of the body 15 is higher than the temperature of the surface of the body mold 117a, the above-described initial shrinkage is less likely to occur.

  First, the body 15 of the preform 1 mounted on the mold 117 is stretched in the longitudinal direction by the stretching rod 118. At this time, the longitudinal stretching ratio from the preform 1 to the PET bottle 2 is preferably 1.8 or more and 4.0 or less. Here, the longitudinal stretching ratio refers to the height H2 of the body 30 of the PET bottle 2 with respect to the height H1 of the body 15 of the preform 1 (see FIGS. 1 and 8) (see FIGS. 5 and 8). (H2 / H1). The molecules of the preform 1 having an amorphous structure, which is an aggregate of an amorphous part and a crystal part, undergo orientation crystallization by stretching, and as a result, the strength, rigidity, and heat resistance of the PET bottle 2 increase. Therefore, in a later step, the PET bottle 2 that can be filled with the high-temperature beverage 50 can be manufactured. When the longitudinal stretching ratio is less than 1.8, the orientation of the molecules of the preform 1 does not increase, while when the longitudinal stretching ratio exceeds 4.0, the PET bottle 2 becomes difficult to mold.

  Further, air P whose pressure and temperature are adjusted is blown out from the air supply device and supplied into the preform 1. First, the body 15 of the preform 1 is stretched laterally by the low-pressure air P1 of, for example, 5 bar or more and 16 bar or less supplied with the stretching of the preform 1 in the vertical direction so that the body 15 does not hit the body mold 117a (pre-blow). ) Is done. Thereafter, the body 15 of the preform 1 is stretched in the lateral direction by high-pressure air P2 of, for example, 20 bar or more and 38 bar or less in about 0.5 to 1.5 seconds until it hits the body mold 117a.

  At this time, the transverse stretching ratio from the preform 1 to the PET bottle 2 is preferably 1.8 or more and 3.0 or less. Here, the lateral stretching ratio refers to the outer diameter D4 of the body 30 of the PET bottle 2 with respect to the outer diameter D1 of the body 15 of the preform 1 (see FIGS. 1 and 8) (see FIGS. 5 and 8). (D4 / D1). The molecules of the preform 1 are similarly oriented and crystallized by stretching in the lateral direction, and as a result, the strength, rigidity and heat resistance of the PET bottle 2 are increased. Therefore, in a later step, the PET bottle 2 that can be filled with the high-temperature beverage 50 can be manufactured. When the transverse stretching ratio is less than 1.8, the orientation of the molecules of the preform 1 does not increase, while when the transverse stretching ratio exceeds 3.0, the PET bottle 2 becomes difficult to mold.

  The preform 1 is set in advance from the time when the preform 1 is mounted on the mold 117 to the time when the preform 1 is stretched into the shape of the PET bottle 2 so that the crystallization of the body portion 30 of the PET bottle 2 does not progress too much so that the PET bottle 2 is not easily stretched. It is controlled to fit within the time.

  In the method of manufacturing the filling body 80 according to the present embodiment, cooling air may be further blown to the PET bottle 2 during the blow molding step (step S4). FIG. 10 is a schematic diagram illustrating an example of blowing the cooling air C1 onto the PET bottle 2.

  The biaxially stretched blow-molded PET bottle 2 is adhered to the mold 117 of the biaxially stretched blow molding apparatus 112. Then, the stretching rod 118 is arranged inside the mold 117 and the PET bottle 2. The stretching rod 118 is provided with a cooling air blowing unit 119. The cooling air blowing unit 119 communicates with the air supply device, and is configured to blow out high-pressure cooling air C1 whose pressure and temperature are adjusted. With the provision of the cooling air blowing portion 119, deformation due to initial shrinkage when the PET bottle 2 comes into contact with the body mold 117a can be improved. The pressure of the cooling air C1 may be the same as that of the high-pressure air P2, and the time for blowing the cooling air C1 may be about 1/10 to 4/5 of the high-pressure air P2. More specifically, the blowing time of the cooling air C1 is 0.1 second to 1.5 seconds, and 1% to 90%, more preferably 60% to 80% of the time of the high pressure air P2. Is preferred.

  Vent holes are formed in the stretching rod 118 in the radial (horizontal) direction, and cooling air C1 is blown in a direction substantially perpendicular to the inner surface of the body 30 of the PET bottle 2. As soon as the body 30 of the PET bottle 2 touches the body mold 117a, contraction starts. When the cooling air C1 is blown there, the body 30 is pressed in the direction of the body mold 117a to suppress deformation thereof and to impart heat resistance to the body 30. Therefore, the crystallization is further promoted by blowing the cooling air C1 on the body 30 of the PET bottle 2 which is blow-molded and in a high temperature state. The temperature of the cooling air C1 is preferably 1 ° C. or more and 30 ° C. or less. When the temperature of the cooling air C1 is lower than 1 ° C., a temperature distribution is generated in the body 30 and distortion tends to occur. On the other hand, when the temperature of the cooling air C1 exceeds 30 ° C., Is difficult to cool, and its heat resistance decreases.

  As another method, the high-pressure air P2 blown out from the stretching rod 118 may be switched to the cooling air C1 in a stepwise manner. This method also promotes crystallization of the body 30 of the PET bottle 2. In the process of blowing the high-pressure air P2 in the blow molding, the ratio of the cooling air C1 may be gradually increased at a time of, for example, 1% to 90%, more preferably 60% to 80% from the end stage. If the time is too short, the effect of this method is less likely to appear, and if the time is too long, the crystallization of the body 30 is less likely to be promoted.

  In addition, it is preferable to blow the cooling air C1 also on the outer surface side of the body 30 of the PET bottle 2. This promotes crystallization on the outer surface side of the body 30 of the PET bottle 2. The blowing of the cooling air C1 to the outer surface of the body 30 may be performed after the mold 117 is opened, or the blowing may be continued until the next step is performed.

  By blowing the cooling air C1 onto the body 30 of the PET bottle 2 as described above, heat resistance can be imparted to the body 30 while effectively suppressing shrinkage of the body 30. The surface temperature of the PET bottle 2 can be quickly reduced to reduce the speed required for manufacturing the PET bottle 2. Furthermore, when the cooling air C1 is blown onto the body 30 of the PET bottle 2, since the shrinkage of the body 30 can be effectively suppressed, the surface temperature of the body mold 117a is set to, for example, 125 ° C. Can be set higher. Therefore, by blowing the cooling air C1, crystallization can be further promoted, and the PET bottle 2 having higher temperature heat resistance can be manufactured.

  The crystallinity of the body 30 of the PET bottle 2 is preferably 25% or more and 39% or less. When the crystallinity is in this range, the PET bottle 2 having heat resistance can be molded from the preform 1 with good shapeability. The crystallinity of the body 30 of the PET bottle 2 can be derived from the density. In addition, the crystallinity of the body 30 of the PET bottle 2 can be evaluated by Raman spectroscopy.

The density of the body 30 of the PET bottle 2 manufactured by the method for manufacturing the filling body 80 according to the present embodiment is 1.367 g / cm ³ or more and 1.380 g / cm ³ or less. The density of the body 30 of the PET bottle 2 can be measured by a specific gravity method, for example, a density gradient tube method using a cut piece obtained by cutting a part of the body 30 into, for example, 1 cm square. By measuring the density of the body 30 of the PET bottle 2 in the filling body 80 produced by the in-line production apparatus 100, it is determined whether or not the method for producing the filling body 80 according to the present embodiment has been used. Can be determined.

  Furthermore, the tensile fracture strain of the trunk 30 of the PET bottle 2 manufactured by the method of manufacturing the filling body 80 according to the present embodiment is 40% or more and 68% or less.

  As a method of measuring the tensile fracture strain of the body 30 of the PET bottle 2, a cut piece obtained by cutting a part of the body 30 into, for example, a short side of 10 mm × a long side of 50 mm is used as a sample, and a sample extending in the long side direction is used. After one is fixed, it is pulled in the long side direction at 85 ° C. at 300 mm / min. Then, the tensile fracture strain of the body 30 of the PET bottle 2 can be examined by measuring what percentage of the PET bottle 2 is cut when pulled. By measuring the tensile fracture strain of the body 30 of the PET bottle 2 in the filling body 80 manufactured by the manufacturing apparatus 100 configured in the in-line method, whether or not the manufacturing method of the filling body 80 according to the present embodiment was used. Can be determined. Here, the maximum load shown when the sample breaks is the tensile strength, and the value divided by the cross-sectional area is the tensile stress.

  The blow-molded PET bottle 2 is separated from the mold 117. In the method of manufacturing the filling body 80 according to the present embodiment, the blow molding time is shortened as much as possible because of the inline method, and the PET bottle 2 is likely to shrink. However, since the rough surface portion 117R of the body mold 117a has been subjected to graining, the rough surface portion 117R and the heel portion 37 are in contact not at a solid surface but at a point, and the heel portion 37 contracts inward. There is no sinking or undulation, and sink is unlikely to occur. Therefore, the shapeability of the PET bottle 2 can be improved. Further, in the method of manufacturing the filling body 80 according to the present embodiment, the manufacturing time can be reduced as compared with the heat-resistant bottle, the manufacturing efficiency can be increased, and the manufacturing cost can be reduced.

  The surface roughness (Ra) of the heel portion 37 of the PET bottle 2 manufactured by the method of manufacturing the filling body 80 according to the present embodiment is 0.3 μm or more and 3 μm or less. With such a surface roughness, it is possible to maintain the characteristic of being transparent while having heat resistance. As an index of the surface roughness of the heel portion 37, for example, an arithmetic average roughness Ra can be used. As a method of measuring the arithmetic average roughness Ra, it can be checked by performing image analysis on three-dimensional data obtained by a laser microscope. The method of manufacturing the filling body 80 according to the present embodiment by measuring the surface roughness of the body 30 of the PET bottle 2, particularly the heel part 37, of the filling body 80 manufactured by the manufacturing apparatus 100 configured by the in-line method. Can be determined.

  Next, as shown in FIG. 9, the PET bottle 2 is supplied to the hot filling machine 120 (Step S5). Since the manufacturing apparatus 100 of the filling body 80 according to the present embodiment is configured by the inline method, the molded PET bottle 2 is promptly supplied to the hot filling machine 120. The supplied PET bottle 2 is sequentially delivered by a gripper attached to the outer peripheral portion of each of a plurality of rotating disk-shaped transport wheels, for example, and is transported to the filler 121. It is preferable that the time from the molding of the PET bottle 2 to the supply to the hot filling machine 120 be within 10 seconds. As described above, since the method for manufacturing the filling body 80 according to the present embodiment is an in-line method, the PET bottle 2 is used for filling the beverage 50 in a state in which the heat resistance is not significantly reduced by humidification.

  On the other hand, in the hot filling machine 120, the beverage 50 to be filled in the PET bottle 2 is sterilized by heating (step S6). The heating sterilization is performed by appropriately setting a predetermined temperature and a holding time such as 120 ° C. for 4 minutes or 85 ° C. for 30 minutes according to the characteristics of the beverage 50, for example, acidity and water activity. .

  Then, in the filler 121 of the hot filling machine 120, the PET bottle 2 is filled with the beverage 50 (Step S7). The filler 121 injects the hot sterilized liquid content, such as the beverage 50, into the PET bottle 2 as it is at a high temperature, for example, 71 ° C or more and 95 ° C or less, more preferably 81 ° C or more and 90 ° C or less. Similarly, the PET bottle 2 filled with the beverage 50 is sequentially delivered by the gripper, and transported to the capper 122.

  The PET bottle 2 manufactured by the method according to the present embodiment does not have heat resistance as high as that of a body mold 117a widely used as hot filling molded at a temperature of 160 ° C. or higher. . However, the PET bottle 2 has sufficient heat resistance to be filled with the high-temperature beverage 50 in the above-mentioned temperature range, for example, 71 ° C or higher and 95 ° C or lower, more preferably 81 ° C or higher and 90 ° C or lower. Produced. In the method for manufacturing the filling body 80 according to the present embodiment, a method is used in which the beverage 50 is filled at the time when the heat resistance is maintained most immediately after the PET bottle 2 is formed. Therefore, according to the method for manufacturing the filling body 80 according to the present embodiment, the PET bottle 2 can be filled with the high-temperature beverage 50 without any problem.

  As described above, the PET bottle 2 enables the high-temperature beverage 50 to be filled. Therefore, for example, the inner surface of the PET bottle 2 can be sufficiently sterilized with the high-temperature beverage 50 of 71 ° C. or more and 95 ° C. or less, more preferably 81 ° C. or more and 90 ° C. or less. Then, even if oxygen is sealed together with the beverage 50 in the filling body 80 due to sufficient sterilization, the risk of aerobic bacteria growing there is extremely low. You don't have to. Therefore, according to the method according to the present embodiment, the more the filling is full, the more easily the bacteria grow on the outer surface of the PET bottle 2, and the higher the temperature of the beverage 50, the more easily the opening 10 particularly the open end. 11 can be effectively prevented from being thermally deformed.

  As described above, in the method for manufacturing the filling body 80 according to the present embodiment, the blow molding of the PET bottle 2 and the filling of the beverage 50 into the PET bottle 2 are performed in an inline manner. 2 is maintained in a high heat resistance state. However, from the viewpoint of further maintaining the heat resistance of the PET bottle 2, at least in the manufacturing apparatus 100 for the filling body 80, the PET bottle 2 is filled with the beverage 50 after the PET bottle 2 is blow-molded. It is more preferable that the PET bottle 2 is held in an environment of a predetermined humidity or less, preferably 40% or less in a region until the temperature is lowered.

  Next, the cap 60 is supplied to the capper 122 of the hot filling machine 120 (step S8). Note that, although the cap 60 may be sterilized by, for example, ultraviolet irradiation, in the method of manufacturing the filling body 80 according to the present embodiment, the cap 60 is non-sterile before filling the beverage 50. There may be. In addition, by sterilizing the cap 60, the filling temperature of the beverage 50 and the temperature of the pasterizer 140 can be reduced, and the heat resistance of the PET bottle 2 required at the time of manufacturing the filling body 80 can be reduced. it can.

  Then, the cap 60 is attached to the PET bottle 2 by the capper 122 (step S9). Thereby, the filling body 80 according to the present embodiment is formed. In the present embodiment, the opening end 11 side is heat-treated so that the haze value is higher than the support ring 12 side, and has heat resistance, so that no deformation occurs when the cap 60 is attached. , PET bottle 2 can be reliably sealed. Note that the steps up to this point are preferably performed in a space in which environmental conditions such as cleanliness, temperature, and humidity are controlled, such as in a sterile area. The formed packing body 80 is carried to the overturning sterilizer 130 by a conveyor belt such as a conveyor.

  Next, the filling body 80 is sterilized by the overturning sterilizer 130 (Step S10). The overturning sterilizer 130 conveys the filling body 80, for example, while lying down. When the filling body 80 is turned over, the cap 60 and the inner surface of the PET bottle 2, particularly near the mouth 10, are sterilized by contact with the hot beverage 50. In the present embodiment, the opening end 11 side is heat-treated so that the haze value is higher than the support ring 12 side, and has heat resistance. The sealed state of the PET bottle 2 can be reliably maintained.

  Subsequently, the filling body 80 is cooled by the past riser 140 (step S11). As described above, it is preferable that the temperature of the liquid stored in the first tank of the pasterizer 140 be 70 ° C. or less. By rapidly cooling the filling body 80 at 70 ° C. or lower, heat damage to the mouth 10 of the PET bottle 2 can be reduced. Thereafter, the liquid temperature of the beverage 50 inside the filling body 80 is gradually lowered by the second and subsequent tanks of the past riser 140, and finally cooled to normal temperature.

  Thereafter, a labeler is attached to the filling body 80 by a labeler and a caser 150, and then the packing body 80 is packed in a cardboard box. The filling body 80 according to the present embodiment is manufactured by the above method.

  The reduced pressure amount of the filling body 80 produced by the method of manufacturing the filling body 80 according to the present embodiment is 1 kPa or more and 15 kPa or less. The amount of reduced pressure of the filling body 80 can be measured by a pressure gauge, for example, a diaphragm (diaphragm) type pressure gauge. The measurement of the amount of reduced pressure is performed by inserting a perforated needle communicating with a detector included in the pressure gauge into the head space of the filling body 80. By measuring the amount of reduced pressure of the packing body 80 manufactured by the manufacturing apparatus 100 configured in the in-line method, it is possible to determine whether or not the manufacturing method of the packing body 80 according to the present embodiment has been used. In this case, a value corresponding to the content is appropriately set as the pressure reduction amount of the filling body 80.

  Providing the PET bottle 2 having heat resistance applicable to hot filling and the filling body 80 in which the filling body 80 hot-filled with the beverage 50 is produced in-line by including the steps described above. A method can be provided. The preform 1 and the PET bottle 2 according to the present embodiment have heat resistance on the side of the open end 11 comparable to that of a crystallization port widely used for hot filling. If the side 30 has sufficient heat resistance, it can be applied to a non-in-line manufacturing method.

  According to the method for manufacturing the filling body 80 according to the present embodiment, unlike the method in which the preformed plastic bottle is supplied to the content filling apparatus, the high temperature of the PET bottle 2 is not changed after the PET bottle 2 is formed. The process can proceed to filling the beverage 50. For this reason, the filling is started before the crystallinity of the body 30 of the PET bottle 2 decreases, and the high-temperature beverage 50 can be filled without lowering the heat resistance. It should be noted that these machines are combined as one device rather than simply connecting the transport path of the PET bottle 2 between the bottle forming machine 110 (biaxial stretch blow molding device 112) and the hot filling machine 120 (filler 121). By doing so, the effect will be higher.

  When a widely used heat-resistant bottle is molded, the temperature of the body mold 117a is set as high as, for example, 150 ° C. or more and 165 ° C. or less. When the temperature of the body mold 117a rises, the initial shrinkage becomes large and deformation occurs, the material of the mold 117 is limited, the cost increases, and the temperature difference from the external environment, especially the air temperature, increases, and the heat resistance increases. Variations in quality, such as heat resistance and shape of the bottle, may increase. Furthermore, when the temperature of the body mold 117a rises, it is necessary to increase the time during which the high-pressure air P2 is blown, and the production capacity decreases. On the other hand, according to the manufacturing method of the filling body 80 according to the present embodiment, it is possible to fill the high-temperature beverage 50 even if the heat resistance of the PET bottle 2 is lower than the widely used heat-resistant bottle. Thus, the temperature of the body mold 117a can be lowered. Therefore, according to the method of manufacturing the filling body 80 according to the present embodiment, it is possible to prevent the above-described problem from occurring.

  Furthermore, according to the method of manufacturing the filling body 80 according to the present embodiment, an in-line method is used in which the PET bottle 2 can be molded at a higher speed than a method in which a pre-molded plastic bottle is supplied to a filling device for contents. Therefore, the cost of manufacturing the filling body 80 can be reduced.

  Furthermore, according to the method of manufacturing the filling body 80 according to the present embodiment, since the method of supplying the preform 1 instead of the PET bottle 2 is used, the cost of transporting the material can be reduced. That is, when the PET bottle 2 is molded in-line, the form of the container supplied to the manufacturing apparatus 100 for the filling body 80 can be changed to the preform 1 having a smaller volume than the PET bottle 2. The number of transports from the manufacturer can be greatly increased, for example, six times or more. Therefore, the manufacturing apparatus 100 and the manufacturing method of the filling body 80 according to the present embodiment in which the bottle forming machine 110 of the PET bottle 2 is inlined contribute to reduction of container transportation cost and reduction of environmental load. Become.

  Next, a method for manufacturing the filling body 80 according to another embodiment will be described in detail. FIG. 11 is a flowchart showing an outline of a manufacturing process of the filling body 80 according to another embodiment. The manufacturing method of the filling body 80 according to another embodiment is characterized in that the step of blowing the cooling air C1 to the PET bottle 2 (step S4) is omitted from the manufacturing method shown in FIG. Here, in the manufacturing method according to another embodiment, the description of the same parts as in the manufacturing method shown in FIG. 9 will be omitted as appropriate.

  In the manufacturing method according to another embodiment, similarly to the manufacturing method shown in FIG. 9, blow molding of the PET bottle 2 by stretching the preform 1 is performed (Step S3). However, in the method of manufacturing the filling body 80 according to another embodiment, the temperature of the surface of the body mold 117a is set to 90 ° C. or more and 115 ° C. or less.

  Here also, it is preferable that the temperature of the body portion 15 of the preform 1 heated in step S2 be higher than the temperature of the surface of the body mold 117a. If the temperature of the body portion 15 is higher than the temperature of the surface of the body mold 117a, initial shrinkage is unlikely to occur.

  Then, similarly to the manufacturing method shown in FIG. 9, the body 15 of the preform 1 mounted on the mold 117 is stretched in the longitudinal direction by the stretching rod 118. Further, the body 15 of the preform 1 stretched in the longitudinal direction is stretched by the high-pressure air P2 in the transverse direction until it hits the body mold 117a.

  In the method of manufacturing the filling body 80 according to another embodiment, the blowing of the cooling air C1 to the PET bottle 2 (step S4) is omitted in the step of blow molding. However, in the method of manufacturing the filling body 80 according to another embodiment, the temperature of the surface of the body mold 117a is set to 90 ° C. or more and 115 ° C. or less, and the temperature of the body 15 of the preform 1 to be heated is set to The temperature of the surface of the body mold 117a. This effectively suppresses the initial shrinkage when the trunk portion 15 of the preform 1 is stretched and hits the trunk mold 117a. Therefore, in the method for manufacturing the filling body 80 according to another embodiment, even if the step of blowing the cooling air C1 onto the PET bottle 2 (Step S4) is omitted, the PET bottle 2 having heat resistance applicable to hot filling can be used. And the filling body 80 in which the beverage 50 is hot-filled can be produced.

  The blow-molded PET bottle 2 is supplied to the hot filling machine 120 (step S5), and thereafter, the filling body 80 is manufactured through the same steps as the manufacturing method shown in FIG. .

  The manufacturing method of the filling body 80 according to another embodiment has the same effect as the manufacturing method shown in FIG.

  In addition to this, in the method of manufacturing the filling body 80 according to another embodiment, since the surface temperature of the body mold 117a can be set lower, for example, quenched and tempered steel of stainless steel, Aluminum can be used instead of mold steel. By using aluminum, the processing of the mold 117 is facilitated, the degree of freedom in design is increased, and the manufacturing cost can be suppressed. Further, in the method of manufacturing the filling body 80 according to another embodiment, an apparatus for blowing the cooling air C1 can be omitted. Therefore, it is possible to use the biaxial stretch blow molding device 112 that does not include the cooling air blowing unit 119, and it is possible to enhance versatility. Furthermore, in the method of manufacturing the filling body 80 according to another embodiment, since the step of blowing the cooling air C1 (Step S4) is unnecessary, the production of the filling body 80 in which the PET bottle 2 and the beverage 50 are hot-filled is performed. Speed can be improved.

  As described above, in the method for manufacturing the filling body 80 according to the present embodiment, the preform 1 having been subjected to the heat treatment so that the haze value is higher on the side of the open end 11 than on the side of the support ring 12. A step of heating the body 15; a step of blow-molding the PET bottle 2 from the preform 1 using the mold 117; a step of filling the PET bottle 2 with the high-temperature beverage 50; , A step of disinfecting the mouth 10 of the PET bottle 2 and the cap 60 by overturning, and a step of cooling the PET bottle 2, wherein all the steps are performed in an inline manner. I do.

  Furthermore, the PET bottle 2 has heat resistance to the hot beverage 50 to be filled by the method of manufacturing the filling body 80 according to the present embodiment, and the inner ring 65, the contact ring 66, and the outer ring 65 of the cap 60 to be mounted. A mouth 10 to which the cap 60 is attached from the side of the open end 11, a shoulder 20 connected to the support ring 12 of the mouth 10, a body 30 connected to the shoulder 20, and a body 30 is provided, and the haze value is higher at the open end 11 side including the contact portion with the inner ring 65, the contact ring 66, and the outer ring 67 than at the support ring 12 side. I do.

  And according to this embodiment, even if the mouth part 10 is a shape widely used for normal-temperature filling | filling, the fall of the sealing property resulting from shrinkage | contraction or deformation | transformation by the hot beverage 50 to be filled is suppressed. It is possible to provide a preform 1, a method for manufacturing the preform 1, a crystallization apparatus 90 for the preform 1, a PET bottle 2, and a method for manufacturing the filling body 80.

  Hereinafter, the present disclosure will be described in more detail and specifically with reference to examples. However, the present disclosure is not limited to the following examples.

<Material and manufacturing method>
[Example 1]
A preform 1 made of polyethylene terephthalate and having a non-crystalline mouth 10 was prepared in advance. The preform 1 is attached to the holder 91 of the crystallization device 90 for the preform 1 configured to suppress the deformation of the opening end 11 side, and the opening end 11 side of the opening 10 is heated by the heat treatment section 92. Heated and crystallized. In this manner, the opening end 11 side including the contact portions with the inner ring 65, the contact ring 66, and the outer ring 67 has a feature according to the present embodiment such that the haze value is higher than the support ring 12 side. Preform 1 was formed. That is, the preform 1 was formed such that the haze value on the side of the opening end 11 was 5% and the haze value on the side of the support ring 12 was 2%.

  And the filling body 80 was produced by the manufacturing method of the filling body 80 according to the present embodiment shown in FIG. At that time, the body 15 of the preform 1 was heated to 125 ° C, and the temperature of the surface of the body mold 117a was set to 125 ° C. The step of blow molding (step S3) includes the step of blowing cooling air C1 to the PET bottle 2 (step S4). The temperature of the hot beverage 50 to be filled was 90 ° C. As the cap 60 to be attached, an M cap manufactured by Nippon Closure Co., Ltd., which is widely used for filling at room temperature, was used.

[Comparative Example 1]
A preform generally made of polyethylene terephthalate and widely used as a crystallization port was used. The preform was used as a crystallization port by a mouth crystallization apparatus (manufactured by Osaka Reiki Co., Ltd.). Then, in the same manner as in Example 1, the filler was manufactured by the method for manufacturing the filler 80 according to the present embodiment shown in FIG. 9.

[Comparative Example 2]
A preform generally made of polyethylene terephthalate and widely used as a non-crystallization port was used. Then, in the same manner as in Example 1, the filler was manufactured by the method for manufacturing the filler 80 according to the present embodiment shown in FIG. 9.

<Evaluation method>
(Dimension inspection)
The inside diameter, outside diameter, and mouth height of each of the preforms of Example 1, Comparative Example 1, and Comparative Example 2 were measured. In addition, about each of Example 1 and Comparative Example 1, it measured before and after crystallization. An evaluation was made as to whether the dimensions were within the range of dimensions corresponding to the PCO1810 standard. Table 1 shows the results of the evaluation of the dimensional inspection of each preform, where ○: within the standard, ×: out of the standard.

(Sealability inspection)
Each of the fillers of Example 1, Comparative Example 1, and Comparative Example 2 was immersed in water, and it was determined whether bubbles were generated in the water when 0.5 MPa air was injected from the upper portion 62 of the cap 60 for 1 minute. confirmed. ：: Not leaked, ×: Leaked.

(Comprehensive evaluation)
Based on the dimensional inspection and the sealability inspection described above, a comprehensive evaluation of each preform (each filler) of Example 1, Comparative Example 1, and Comparative Example 2 was made. Table 1 shows the results of the comprehensive evaluation. The overall evaluation is indicated by ○: good, ×: not suitable.

  The following points have been derived from the embodiments described above. As shown in Table 1, in Example 1, a change in dimensions before and after crystallization was suppressed, and deformation of the opening 10, particularly, the opening end 11 side due to heating was suppressed. And in Example 1, there was no leak from between the mouth part 10 and the cap 60, and the sealing property was good. In Comparative Example 1, since the deformation on the side of the opening end due to heating was not suppressed when the crystallization port was formed by the mouth crystallization apparatus, the crystal did not fall within the range of dimensions corresponding to the PCO1810 standard after crystallization. There was something. In Comparative Example 2, the opening end was deformed, causing liquid leakage, and did not have a sealing property.

  From the results of the above examples, in the method of manufacturing the preform 1 according to the present embodiment, the dimensional change does not occur even if heat treatment for imparting heat resistance to the preform 1 in which the mouth portion 10 is amorphous is performed. Was suppressed, and the sealing performance was good even when the high-temperature beverage 50 was filled. And it was shown that according to the manufacturing method of the filling body 80 according to the present embodiment, the PET bottle 2 can be filled with the high-temperature beverage 50 without any problem. Therefore, in the present embodiment, even if the mouth portion 10 has a shape that is widely used as a standard for filling at room temperature, a decrease in sealing performance due to shrinkage or deformation caused by the filled hot beverage 50 is suppressed. It has been shown that it is possible to provide a method for manufacturing the reform 1, the method for manufacturing the preform 1, the apparatus for crystallizing the preform 1, the method for manufacturing the PET bottle 2, and the method for manufacturing the filling body 80.

  The present disclosure can be suitably used for the production of various filling bodies 80 filled with a liquid as a content. However, the present disclosure is not limited to the above-described embodiments and examples. Filler 80 of the present disclosure, in the content, for example, water, green tea, oolong tea, black tea, coffee, fruit juice, various non-carbonated drinks such as soft drinks, and carbonated drinks, or soy sauce, sauce, seasonings such as mirin, Useful for all kinds of packing 80 containing edible oils, foods including alcoholic beverages, detergents, shampoos, cosmetics, medicines, etc., and heat-resistant containers, so they can be heated and sold in vending machines and stores. Also suitable for.

1 Preform 2 PET bottle (plastic bottle)
Reference Signs List 10 mouth part 11 open end 12 support ring 13 male screw (screw)
15 Body part of preform 1 20 Shoulder part 30 Body part of PET bottle 2 40 Bottom part 50 Beverage (liquid)
60 Cap 64 Female thread (screw)
65 Inner ring (blocking ring)
66 Contact ring (blocking ring)
67 Outer ring (blocking ring)
Reference Signs List 80 Filler 90 Crystallizer 91 Holder 92 Heat treatment unit 100 Manufacturing device for Filler 80 110 Bottle molding machine 111 Heating device (heating unit)
112 Biaxial stretch blow molding equipment (molding part)
117 Mold 120 Hot filling machine 121 Filler (filling part)
122 capper (mounting part)
130 Overturn sterilizer (overturn sterilizer)
140 Paste riser (cooling unit)
a Vertical length on the side of the opening end 11 b Vertical length on the side of the support ring 12 D2 Root diameter of the male screw 13

Claims (14)

An amorphous preform for molding a plastic bottle having heat resistance to a hot liquid to be filled and sealed by a closing ring of a cap to be mounted,
The closure ring includes at least an outer ring,
A mouth from which the cap is mounted from the side of the open end,
A body connected to the support ring of the mouth,
The preform is characterized in that the opening is discontinuously circumferentially crystallized on the side of the opening end with which the outer ring contacts . Side of the open end, the preform according to claim 1, characterized in that from the open end is a region of up to 5mm towards the support ring. The mouth is
Further comprising a screw that engages with a screw formed on the cap,
Wherein the root diameter of the screw is at 26mm or less, preform as claimed in claim 1 or 2 the inner diameter of the mouth portion is characterized by a 21.74mm ± 0.13mm. The preform according to any one of claims 1 to 3 , wherein the high temperature of the liquid is 71 ° C or higher and 95 ° C or lower. The preform according to any one of claims 1 to 3 , wherein the high temperature of the liquid is 81 ° C or higher and 90 ° C or lower. A method for producing an amorphous preform for molding a plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be mounted,
The closure ring includes at least an outer ring,
The preform is
A mouth from which the cap is mounted from the side of the open end,
A body connected to the support ring of the mouth,
The method of manufacturing a preform, wherein the opening is discontinuously circumferentially crystallized on the side of the opening end with which the outer ring contacts . The method for manufacturing a preform according to claim 6 , wherein the side of the opening end is heat-treated discontinuously in a circumferential direction. The method for producing a preform according to claim 7 , wherein heat treatment is performed at eight locations in the circumferential direction. The method for manufacturing a preform according to any one of claims 6 to 8 , wherein heat insulation is provided between the side of the opening end and the side of the support ring. The method for manufacturing a preform according to any one of claims 6 to 9 , wherein the side of the support ring is cooled. A preform crystallization apparatus for partially crystallizing a preform for molding a plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be mounted,
The closure ring includes at least an outer ring,
A holder for holding a mouth of the preform,
A heat treatment unit for heat-treating the mouth,
The heat treatment unit is configured to heat-treat the opening end side of the mouth portion that is contacted with the outer ring discontinuously in a circumferential direction ,
The apparatus for crystallizing a preform, wherein the holder is configured to suppress deformation of the heated open end side. A plastic bottle having heat resistance to a high-temperature liquid to be filled and sealed by a closing ring of a cap to be attached,
The closure ring includes at least an outer ring,
A mouth from which the cap is mounted from the side of the open end,
A shoulder connected to the support ring of the mouth,
A trunk connected to the shoulder;
A bottom connected to the body,
The plastic bottle is characterized in that the opening is discontinuously circumferentially crystallized on the side of the opening end with which the outer ring contacts . A mouth to which a cap is attached from the side of the open end, and a body connected to a support ring of the mouth, wherein the mouth is molded from a non-crystalline preform and filled with a high-temperature liquid to be filled. A method for producing a filled body in which the high-temperature liquid is filled in a plastic bottle having heat resistance,
The cap has at least an outer ring,
A step of heating the body of the preform in which the side of the opening end with which the outer ring contacts is discontinuous in the circumferential direction ,
Blow molding the plastic bottle using a mold from the preform,
Filling the plastic bottle with the hot liquid,
Attaching a cap to the mouth of the plastic bottle,
A step of overturning and sterilizing the mouth and the cap of the plastic bottle,
And a step of cooling the plastic bottle. A step of heating the body, a step of blow molding the plastic bottle, a step of filling the liquid, a step of attaching the cap, and a step of overturning and sterilizing the mouth and the cap, The method for producing a filled body according to claim 13 , wherein the steps of cooling the plastic bottle are all performed in an in-line system.

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