JP2019077187A - Manufacturing method of composite container, composite preform, composite container and plastic member - Google Patents

Abstract

To provide a manufacturing method of a composite container, a composite preform, a composite container and a plastic member, capable of giving various functions or properties to a container as well as eliminating a process of applying a label by a labeler.SOLUTION: First, a preform 10a made of a plastic material is prepared, and a plastic member 40a is disposed outside the preform 10a. Next, blow molding is applied to the preform 10a and the plastic member 40a to integrally dilate the preform 10a and the plastic member 40a, so as to obtain a composite container 10A. The dilated plastic member 40 has a printing thereon.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method of manufacturing a composite container, a composite preform, a composite container and a plastic member.

  Recently, plastic bottles have become popular as bottles for containing content liquids such as food and drink, and such plastic bottles contain the content liquids.

  A plastic bottle containing such a content liquid is manufactured by inserting a preform into a mold and subjecting it to biaxial stretch blow molding.

  By the way, in the conventional biaxial stretch blow molding method, for example, a preform including a single layer material such as PET or PP, a multilayer material, a blend material or the like is used to be formed into a container shape. However, in the conventional biaxial stretch blow molding method, it is general to merely mold the preform into a container shape. For this reason, when giving a container various functions and characteristics (barrier property, heat retention property, etc.), the means, such as changing the material which comprises a preform, will be limited.

JP, 2009-241526, A

  Also, conventionally, after the container is filled with the content liquid, the container is sealed using a cap, and a label is attached to the periphery of the container using a labeler. However, by installing a labeler and applying a label, it is an issue that the manufacturing cost increases and the yield decreases.

  The present invention has been made in consideration of such points, and it is possible to impart various functions and characteristics to a container, and eliminate the step of applying a label by a labeler. It is an object of the present invention to provide a manufacturing method, a composite preform, a composite container and a plastic member.

  The present invention relates to a method of manufacturing a composite container, comprising the steps of: preparing a preform made of a plastic material; providing a plastic member outside the preform; and blowing the preform and the plastic member. And a step of integrally expanding the preform and the plastic member by performing molding, wherein the expanded plastic member is subjected to printing. .

  The present invention is a method of manufacturing a composite container, wherein the plastic member is subjected to printing after the preform and the plastic member are integrally expanded.

  The present invention is a method of manufacturing a composite container, wherein a plastic member to which printing has been applied in advance is provided on the outside of the preform.

  According to the present invention, after providing a plastic member on the outside of the preform, the plastic member is printed before the blow molding is performed on the preform and the plastic member. It is a manufacturing method of a container.

  The present invention is a method of manufacturing a composite container, wherein the plastic member is subjected to printing after the preform and the plastic member are integrally expanded and before the content liquid is filled.

  The present invention is a manufacturing method of a composite container characterized in that the preform and the plastic member are integrally expanded, filled with a content liquid, and then the plastic member is subjected to printing.

  The present invention is a method of manufacturing a composite container, wherein printing is performed on the plastic member by an inkjet method.

  The present invention is the method of manufacturing a composite container, wherein the plastic member is an outer shrinking member having a shrinking action on the preform.

  The present invention is a method of manufacturing a composite container, wherein the outer shrinking member shrinks with respect to the preform when heat is applied.

  The present invention further includes the step of providing an inner label member so as to surround the outside of the preform, and the plastic member is provided on the outer side of the inner label member. .

  The present invention is the method for producing a composite container, wherein the ink used for the printing is a UV curable ink or an EB curable ink.

  The present invention relates to a composite preform subjected to printing, comprising a preform made of a plastic material and a plastic member provided so as to surround the outer side of the preform, wherein the plastic member is the preform described above. The composite preform is in close contact with the outer surface of the plastic member and is printed on the plastic member.

  The present invention is a composite preform characterized in that the plastic member is subjected to printing by an ink jet method.

  The present invention is a composite preform characterized in that the plastic member is an outer shrinking member having a shrinking action on the preform.

  The present invention is a composite preform characterized in that the outer shrinkable member shrinks with respect to the preform when heat is applied.

  The present invention further includes an inner label member closely provided so as to surround the outside of the preform, and the plastic member is provided in close contact with the outer side of the inner label member. Composite preform.

  The present invention is a composite preform characterized in that the ink used for the printing is a UV curable ink or an EB curable ink.

  The present invention relates to a composite container subjected to printing, comprising a container main body made of a plastic material, and a plastic member provided in close contact with the outside of the container main body, and the container main body and the plastic member It is a composite container characterized by being expanded as one by blow molding, and printing is given to the plastic member.

  The present invention is a composite container characterized in that printing is performed on the plastic member by an ink jet method.

  The present invention is the composite container, wherein the plastic member is an outer shrinking member having a shrinking action.

  The present invention is the composite container, wherein the outer shrinkable member shrinks when heat is applied.

  The present invention further includes an inner label member closely provided so as to surround the outer side of the container body, and the plastic member is provided in close contact with the outer side of the inner label member. Composite container.

  The present invention is the composite container characterized in that the ink used for the printing is a UV curable ink or an EB curable ink.

  The present invention is a composite preform which is mounted so as to surround the outside of a preform and which is integrally heated with the preform to have the preform and a plastic member closely attached to the outside of the preform. A plastic body for producing at least one cylindrical body portion covering at least the body portion of the preform, wherein the printing is performed.

  According to the present invention, since the plastic member is printed, there is no need to provide a step of labeling with a labeler after sealing the container.

FIG. 1 is a partial vertical sectional view showing a composite container according to a first embodiment of the present invention. FIG. 2 is a horizontal sectional view (II-II cross-sectional view of FIG. 1) showing the composite container according to the first embodiment of the present invention. FIG. 3 is a partial vertical sectional view showing a composite preform according to a first embodiment of the present invention. Fig.4 (a)-(d) is a perspective view which shows various plastic members. Fig.5 (a)-(g) is the schematic which shows the manufacturing method of the composite container by the 1st Embodiment of this invention. FIG. 6 is a schematic view showing an example of a printer for printing on a composite container. FIG. 7 is a schematic view showing another example of a printer for printing on a composite container. Fig.8 (a)-(g) is the schematic which shows the manufacturing method of the composite container by the modification of the 1st Embodiment of this invention. Fig.9 (a)-(h) is the schematic which shows the manufacturing method of the composite container by the modification of the 1st Embodiment of this invention. FIG. 10 is a partial vertical sectional view showing a modified example of the composite container according to the first embodiment of the present invention. FIG. 11 is a partial vertical cross-sectional view showing a modified example of the composite preform according to the first embodiment of the present invention. FIG. 12 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. Fig. 13 is a horizontal sectional view showing a composite container according to a second embodiment of the present invention (a sectional view along line XIII-XIII in Fig. 12). FIG. 14 is a partial vertical sectional view showing a composite preform according to a second embodiment of the present invention. Fig.15 (a)-(g) is the schematic which shows the manufacturing method of the composite container by 2nd Embodiment of this invention. 16 (a) to 16 (g) are schematic views showing a method of manufacturing a composite container according to a modification of the second embodiment of the present invention. Fig.17 (a)-(h) is the schematic which shows the manufacturing method of the composite container by the modification of the 2nd Embodiment of this invention. FIG. 18 is a partial vertical sectional view showing a modified example of the composite container according to the second embodiment of the present invention. FIG. 19 is a partial vertical cross-sectional view showing a modified example of the composite preform according to the second embodiment of the present invention.

First Embodiment The first embodiment of the present invention will be described below with reference to the drawings. 1 to 11 show a first embodiment of the present invention.

  First, an outline of a composite container manufactured by the method for manufacturing a composite container (blow molding method) according to the present embodiment will be described with reference to FIGS. 1 and 2. In the present specification, the terms "upper" and "lower" refer to the upper side and the lower side, respectively, in a state where the composite container 10A is erected (FIG. 1).

  The composite container 10A shown in FIGS. 1 and 2 is biaxially stretched with respect to the composite preform 70 (see FIG. 3) including the preform 10a and the plastic member 40a using the blow molding die 50 as described later. It is obtained by expanding the preform 10a of the composite preform 70 and the plastic member 40a integrally as a result of blow molding.

  Such a composite container 10A includes a container body 10 made of a plastic material located inside and a plastic member 40 provided in close contact with the outside of the container body 10.

  Among them, the container body 10 includes a mouth 11, a neck 13 provided below the mouth 11, a shoulder 12 provided below the neck 13, a trunk 20 provided below the shoulder 12, and a trunk And a bottom portion 30 provided below the portion 20.

  On the other hand, the plastic member 40 is in close contact with the outer surface of the container body 10 in a thinly extended state, and is attached to the container body 10 so as not to move or rotate easily.

  Next, the container body 10 will be described in detail. The container body 10 has the mouth 11, the neck 13, the shoulder 12, the body 20, and the bottom 30, as described above.

  Among them, the opening portion 11 has a screw portion 14 screwed to a cap (not shown) and a flange portion 17 provided below the screw portion 14. The shape of the mouth 11 may be a conventionally known shape.

  The neck portion 13 is located between the flange portion 17 and the shoulder portion 12 and has a substantially cylindrical shape with a substantially uniform diameter. The shoulder portion 12 is located between the neck portion 13 and the body portion 20, and has a shape in which the diameter gradually increases from the neck portion 13 side to the body portion 20 side.

  Furthermore, the body portion 20 has a cylindrical shape having a substantially uniform diameter as a whole. However, the present invention is not limited to this, and the body portion 20 may have a polygonal cylindrical shape such as a rectangular cylindrical shape or an octagonal cylindrical shape. Alternatively, the body portion 20 may have a cylindrical shape having a non-uniform horizontal cross section from the upper side to the lower side. Further, in the present embodiment, although the body portion 20 is not formed with unevenness and has a substantially flat surface, the present invention is not limited to this. For example, unevenness such as a panel or a groove may be formed on the body portion 20.

  On the other hand, the bottom portion 30 has a recess 31 located at the center, and a ground portion 32 provided around the recess 31. The shape of the bottom 30 is not particularly limited either, and may have a conventionally known bottom shape (for example, a petaloid bottom shape, a round bottom shape, etc.).

  Moreover, the thickness of the container main body 10 in the trunk | drum 20 is although it is not limited to this, For example, it can make it thin to about 50 micrometers-250 micrometers. Furthermore, the weight of the container body 10 is not limited to this, but can be 10 g to 20 g. By reducing the thickness of the container body 10 as described above, the weight of the container body 10 can be reduced.

  Such a container main body 10 can be manufactured by biaxial stretch blow molding a preform 10a (described later) manufactured by injection molding a synthetic resin material. As the material of the preform 10a, that is, the container body 10, thermoplastic resin, in particular, PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate) may be used. preferable. The container body 10 may be colored in colors such as red, blue, yellow, green, brown, black and white, but in consideration of ease of recycling, the container body 10 is preferably colorless and transparent. Moreover, you may blend and use the various resin mentioned above. Furthermore, in order to enhance the barrier property of the container, a vapor deposition film such as a diamond-like carbon film or a silicon oxide thin film may be formed on the inner surface of the container body 10.

  Moreover, the container main body 10 can also be formed as a multilayer molded bottle of two or more layers. That is, by extrusion molding or injection molding, for example, the interlayer is made of gas barrier properties and light shielding properties such as MXD6, MXD6 + fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate). The resin (intermediate layer) may be formed into a multilayer bottle having gas barrier properties and light shielding properties by extrusion molding and then blow molding a preform 10a having three or more layers. In addition, you may use resin which blended the various resin mentioned above as an intermediate | middle layer.

  Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foam preform having a foam cell diameter of 0.5 to 100 μm is formed, and this foam preform is blow molded. Thus, the container body 10 may be manufactured. Since such a container main body 10 incorporates a foam cell, the light shielding property of the entire container main body 10 can be enhanced.

  Such a container main body 10 may be, for example, a bottle with a full filling volume of 100 ml to 2000 ml. Alternatively, the container body 10 may be a large-sized bottle with a full filling volume of, for example, 10 L to 60 L.

  Next, the plastic member 40 will be described. The plastic member 40 (40a) is provided so as to surround the outside of the preform 10a as described later, and after being closely attached to the outside of the preform 10a, it is obtained by biaxial stretch blow molding with the preform 10a. It is

  The plastic member 40 is attached to the outer surface of the container body 10 without being adhered, and is closely attached to the container body 10 so as not to move or rotate. The plastic member 40 is thinly drawn on the outer surface of the container body 10 to cover the container body 10. Further, as shown in FIG. 2, the plastic member 40 is provided over the entire circumferential direction so as to surround the container body 10, and has a substantially circular horizontal cross section.

  In this case, the plastic member 40 is provided so as to cover the shoulder 12, the body 20 and the bottom 30 except the mouth 11 and the neck 13 in the container body 10. Thereby, desired functions and characteristics can be imparted to the shoulder 12, the body 20 and the bottom 30 of the container body 10.

  The plastic member 40 may be provided in the entire area or a partial area of the container body 10 other than the mouth 11. For example, the plastic member 40 may be provided so as to cover the whole of the neck portion 13, the shoulder portion 12, the body portion 20 and the bottom portion 30 of the container body 10 excluding the mouth portion 11. Furthermore, the number of plastic members 40 is not limited to one, and a plurality of members may be provided. For example, two plastic members 40 may be provided on the outer surface of the shoulder 12 and the outer surface of the bottom 30, respectively.

  On the other hand, since the plastic member 40 is not welded or adhered to the container body 10, it can be peeled off the container body 10 and removed. Specifically, for example, the plastic member 40 may be cut out using a cutter or the like, or the plastic member 40 may be provided in advance with a cutting line (not shown), and the plastic member 40 may be peeled off along the cutting line. it can. Thus, since the plastic member 40 subjected to printing can be separated and removed from the container body 10, the colorless and transparent container body 10 can be recycled as in the conventional case.

  Such a plastic member 40 may not have the function of shrinking the preform 10a, or may have the function of shrinking.

  When the plastic member 40 has a function of contracting with respect to the preform 10a, the plastic member (outer shrinking member) 40 is provided outside the preform 10a, and is integrally heated with the preform 10a. It is obtained by biaxial stretch blow molding.

  In the present embodiment, a printing area 43 on which printing is performed is provided on the outside of the plastic member 40. The printing area 43 is formed by being designed or printed by, for example, a printing method such as an inkjet method or a gravure printing method. This printing may be applied to the plastic member 40 stretched by biaxial stretch blow molding as described later. Alternatively, printing may be applied to the plastic member 40a before being attached to the preform 10a, or may be applied with the plastic member 40a provided on the outside of the preform 10a.

  The printing (the printing area 43) may be applied to the inside of the plastic member 40. In this case, it is possible to prevent the problem that the printing peels off due to abrasion or abrasion applied from the outside.

  In this case, it is possible to display an image or characters on the composite container 10A without separately applying a label or the like to the container body 10 after blow molding. For example, the plastic member 40 may be provided on all or part of the body portion 20 of the container body 10, and images or characters may be displayed on the body portion 20. The printing area 43 may be provided in the entire area of the plastic member 40, or may be provided in part. The items displayed in the print area 43 may be character information such as the name of the content liquid, the manufacturer, and the name of the raw material, as well as the symbol and the name of the product.

  The thickness of the plastic member 40 is not limited to this, but can be, for example, about 5 μm to 500 μm in a state of being attached to the container main body 10.

  Next, the configuration of a composite preform according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 3, the composite preform 70 includes a preform 10 a made of a plastic material and a bottomed cylindrical plastic member 40 a provided outside the preform 10 a.

Among them, the preform 10a includes a mouth 11a, a body 20a connected to the mouth 11a, and a bottom 30a connected to the body 20a. Among these, the opening 11 a corresponds to the opening 11 of the container body 10 described above, and has substantially the same shape as the opening 11.
The body 20 a corresponds to the neck 13, the shoulder 12 and the body 20 of the container body 10 described above, and has a substantially cylindrical shape. The bottom 30 a corresponds to the bottom 30 of the container body 10 described above, and has a substantially hemispherical shape.

  The plastic member 40a is attached to the outer surface of the preform 10a without being adhered, and is closely attached to the preform 10a so as not to move or rotate, or to an extent such that it does not fall by its own weight . The plastic member 40a is provided over the entire circumferential direction so as to surround the preform 10a, and has a circular horizontal cross section.

  In this case, the plastic member 40a is provided so as to cover the entire area of the body portion 20a excluding the portion 13a corresponding to the neck portion 13 of the container main body 10 and the entire area of the bottom portion 30a.

  The plastic member 40a may be provided in the whole area or a partial area other than the opening 11a. For example, the plastic member 40a may be provided so as to cover the whole of the neck portion 13a, the body portion 20a and the bottom portion 30a except for the mouth portion 11a. Furthermore, the number of plastic members 40a is not limited to one, and a plurality of members may be provided. For example, two plastic members 40a may be provided at two places on the outside of the body 20a.

  Such a plastic member 40a may not have the function of shrinking the preform 10a, or may have the function of shrinking.

  In the former case, as the plastic member 40a, for example, a blow tube manufactured by blow molding, a sheet molding tube manufactured by sheet molding, an extrusion tube manufactured by extrusion molding, an inflation molded tube manufactured by inflation molding, etc. However, the present invention is not limited to this, and a molding method other than the above may be used.

  On the other hand, when the plastic member (outer shrinking member) 40a has a shrinking action, the plastic member (outer shrinking member) 40a is, for example, applied to the preform 10a when an external action (for example, heat) is applied. Alternatively, one that shrinks (eg, heat shrinks) may be used. Alternatively, the plastic member (outer shrinking member) 40 may itself be shrinkable or elastic and can be shrunk without any external action.

  Examples of the plastic member 40 a include polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluorine resin, polymethyl methacrylate, polyacrylic acid, methyl polyacrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, Ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluoro rubber, nylon 6, nylon 6, 6, nylon MXD 6, aromatic polya , Polycarbonate, polyethylene terephthalate, polyethylene terephthalate, ethylene polynaphthalene, U polymer, liquid crystal polymer, modified polyphenylene ether, polyether ketone, polyether ether ketone, unsaturated polyester, alkyd resin, polyimide, polysulfone, polyphenylene Sulfide, polyether sulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, epoxy resin and the like can be mentioned. Among them, thermoplastic non-elastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are preferably used. Furthermore, various additives may be added to the material of the plastic member 40a in addition to the main component resin, as long as the characteristics are not impaired. Additives include, for example, plasticizers, UV stabilizers, color inhibitors, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, yarn friction reducing agents, slip agents, mold release agents, An oxidant, an ion exchange agent, a color pigment, etc. can be added. Moreover, they may be those of a blend material, a multilayer structure, or a partial multilayer structure. In addition, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foam member having a foam cell diameter of 0.5 to 100 μm is used, and the foam preform is molded. , Can improve the light shielding property.

  The plastic member 40a may be made of the same material as the container body 10 (preform 10a). In this case, for example, the plastic member 40 can be disposed intensively in a portion of the composite container 10A where the strength is desired to be increased, and the strength of the portion can be selectively increased. For example, a plastic member 40 may be provided around the shoulder 12 and the bottom 30 of the container body 10 to increase the strength of this portion. Such materials include thermoplastic resins, in particular PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate).

  The plastic member 40a may be made of a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. In this case, the gas barrier properties of the composite container 10A can be enhanced and deterioration of the content liquid due to oxygen or water vapor can be prevented without using a multilayer preform or a preform containing a blend material as the preform 10a. For example, a plastic member 40 may be provided all over the shoulder portion 12, the neck portion 13, the body portion 20 and the bottom portion 30 in the container body 10 to enhance the gas barrier property of this portion. Such materials include PE (polyethylene), PP (polypropylene), MXD-6 (nylon), PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or oxygen such as fatty acid salts in these materials It is also conceivable to mix absorbents.

  The plastic member 40a may be made of a material having a light beam barrier property such as ultraviolet light. In this case, without using a multilayer preform or a preform containing a blend material as the preform 10a, it is possible to enhance the light beam barrier property of the composite container 10A and to prevent the content liquid from being deteriorated by ultraviolet light or the like. For example, a plastic member 40 a may be provided on the entire area of the shoulder 12, the neck 13, the body 20 and the bottom 30 of the container body 10 to enhance the ultraviolet barrier property of this part. As such a material, a blend material, or a material obtained by adding a light shielding resin to PET, PE, or PP can be considered. Moreover, you may use the foaming member with a foaming cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the molten material of a thermoplastic resin.

  Further, the plastic member 40a may be made of a material (material with low thermal conductivity) that is more heat-retaining or cold-maintaining than the plastic material that constitutes the container body 10 (preform 10a). In this case, it is possible to make it difficult to transmit the temperature of the content liquid to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. Thereby, the heat retention property or cold storage property of the composite container 10A is enhanced. For example, a plastic member 40 may be provided on all or part of the body portion 20 of the container body 10 to enhance the heat retention or cold storage property of the body portion 20. Further, when the user holds the composite container 10A, it is possible to prevent the composite container 10A from being difficult to hold by being too hot or too cold. As such a material, foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, etc. can be considered. Moreover, you may use the foaming member with a foaming cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the molten material of a thermoplastic resin.

  The plastic member 40a may be made of a material that is less slippery than the plastic material that constitutes the container body 10 (preform 10a). In this case, the user can easily hold the composite container 10A without changing the material of the container body 10. For example, the plastic member 40 may be provided on all or part of the barrel 20 of the container body 10 to make the barrel 20 easy to hold.

  The plastic member 40a may be previously subjected to design or printing. That is, the printing area 43a subjected to printing may be provided outside the plastic member 40a. The printing area 43a is formed by applying a design or printing on the plain plastic member 40a by a printing method such as an inkjet method or a gravure printing method. This printing may be applied to the plastic member 40a before being attached to the preform 10a, or may be applied with the plastic member 40a provided on the outside of the preform 10a. The plastic member 40a may be colored in colors such as red, blue, yellow, green, brown, black and white, and may be transparent or opaque. The printing (the printing area 43a) may be applied to the inside of the plastic member 40a. In this case, for example, the plastic member 40a may be produced by using a film printed on one side and forming a tubular shape so that the one side is inside (FIG. 4 (c) and FIG. 4 (d)). Alternatively, an ink jet nozzle may be inserted inside the cylindrical plastic member 40a, and printing may be performed on the inside of the plastic member 40 by the ink jet method.

  Next, the shape of the plastic member 40a will be described.

  As shown in FIGS. 3 and 4 (a), the plastic member 40a has a cylindrical shape with a bottom as a whole, and has a cylindrical body 41 and a bottom 42 connected to the body 41. It is good. In this case, since the bottom portion 42 of the plastic member 40a covers the bottom portion 30a of the preform 10a, in addition to the body portion 20 of the composite container 10A, various functions and characteristics such as barrier property are given to the bottom portion 30 as well. Can. Such a plastic member 40a can be, for example, the above-mentioned blow tube or sheet forming tube.

Further, as shown in FIG. 11 (described later) and FIG. 4 (b), the plastic member 40a as a whole is formed in a circular pipe shape (no-bottom cylindrical shape), and may have a cylindrical body portion 41. good.
In this case, as the plastic member 40a, for example, the above-described blow tube, extruded tube, inflation molded tube, or sheet molded tube can be used.

  Moreover, as shown in FIG.4 (c) and FIG.4 (d), the plastic members 40a may be produced by forming a film in a cylinder shape, and bonding the end part together. In this case, as shown in FIG. 4 (c), the plastic member 40a may be formed in a tubular shape (no-bottom cylindrical shape) having a body 41, as shown in FIG. 4 (d), The bottom portion 42 may be bonded to form a bottomed cylindrical shape.

  Next, with reference to FIGS. 5A to 5G, a method of manufacturing a composite container 10A (a blow molding method) according to the present embodiment will be described.

  First, a preform 10a made of a plastic material is prepared (see FIG. 5 (a)). In this case, for example, the preform 10a may be manufactured by an injection molding method using an injection molding machine (not shown). Further, a preform generally used conventionally may be used as the preform 10a.

  Next, by providing a plastic member 40a on the outside of the preform 10a, a composite preform 70 having the preform 10a and the plastic member 40a closely attached to the outside of the preform 10a is manufactured (FIG. b) see). In this case, the plastic member 40 a has a cylindrical shape with a bottom as a whole, and has a cylindrical body 41 and a bottom 42 connected to the body 41.

  At this time, a plastic member 40a having an inner diameter which is the same as or slightly smaller than the outer diameter of the preform 10a may be brought into close contact with the outer surface of the preform 10a by pressing it against the preform 10a. Alternatively, as described later, the heat shrinkable plastic member 40a is provided on the outer surface of the preform 10a, and the plastic member 40a is thermally shrunk by heating to 50 ° C. to 100 ° C. to heat the outer surface of the preform 10a. It may be in close contact with

  As described above, the plastic member 40a is brought into close contact with the outside of the preform 10a in advance, and the composite preform 70 is manufactured, whereby a series of steps of manufacturing the composite preform 70 (FIGS. 5A to 5B) ) And a series of steps (FIG. 5 (c) to (g)) of producing the composite container 10A by blow molding can be performed at different places (such as a factory).

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 5C). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth 11 a facing downward. The heating temperature of the preform 10a and the plastic member 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow molding die 50 (see FIG. 5D).

  The composite container 10A is molded using the blow molding die 50. In this case, the blow molding die 50 is composed of a pair of barrel molds 50a and 50b and a bottom mold 50c which are divided from each other (see FIG. 5 (d)). In FIG. 5D, the pair of body molds 50a and 50b are open to each other, and the bottom mold 50c is raised upward. In this state, the composite preform 70 is inserted between the pair of body molds 50a and 50b.

  Next, as shown in FIG. 5 (e), after the bottom mold 50c is lowered, the pair of body molds 50a, 50b is closed and sealed by the pair of body molds 50a, 50b and the bottom mold 50c. The blow molding die 50 is constructed. Next, air is pressed into the preform 10a, and biaxial stretch blow molding is applied to the composite preform 70.

  As a result, the container body 10 is obtained from the preform 10 a in the blow molding die 50. During this time, the body molds 50a and 50b are heated to 30 ° C to 80 ° C, and the bottom mold 50c is cooled to 5 ° C to 25 ° C. At this time, in the blow molding die 50, the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded. Thereby, the preform 10 a and the plastic member 40 a are integrally formed into a shape corresponding to the inner surface of the blow molding die 50.

  Thus, a composite container 10A including the container body 10 and the plastic member 40 provided on the outer surface of the container body 10 is obtained.

  Next, as shown in FIG. 5 (f), the pair of body molds 50a, 50b and the bottom mold 50c are separated from each other, and the composite container 10A is taken out from the blow molding mold 50.

  Subsequently, the printing area 43 is formed by printing on the outside of the expanded plastic member 40 (FIG. 5 (g)). Although the printing method is not limited, for example, an inkjet method may be used. In this case, a predetermined design or pattern may be printed by spraying ink from a direction substantially perpendicular to the outer surface of the plastic member 40 using, for example, a known printer 80 (printing apparatus) of the inkjet type. In addition, before printing, the plastic member 40 may be subjected to surface treatment such as primer treatment or corona treatment in advance. Examples of the ink used for printing include a UV curable ink and an EB curable ink.

  Next, the printer 80 (printing apparatus) and the printing method (direct printing) using the printer 80 will be further described.

  FIG. 6 shows an example of a printer for printing on a composite container. In FIG. 6, the printer 80 is provided with a composite container 10A and a head 81 for rotating the composite container 10A (rotation and revolution), and an ink spray for spraying ink of each color onto the composite container 10A mounted on the head 81. A portion 82 and an ink curing portion 83 for curing the ink attached to the composite container 10A. In this case, in the composite container 10A mounted on the head 81, ink of each color is sprayed in the ink spraying unit 82 while rotating and revolving. Thereafter, the composite container 10A ascends in the head 81, and the ink is, for example, UV cured in the ink curing portion 83. Thus, printing is applied to the outside of the plastic member 40.

  FIG. 7 shows another example of a printer for printing on a composite container. In FIG. 7, the printer 80 has a plurality of wheels 84 and 85 for transporting the composite container 10A and rotating (rotation and revolution) the composite container 10A. The plurality of wheels 84, 85 include an ink spraying wheel 84 for spraying ink of each color, and an ink curing wheel 85 for curing the ink adhering to the composite container 10A. In this case, the composite container 10A is sprayed by the ink spray unit 86 of each ink spray wheel 84 while being sequentially conveyed by the ink spray wheels 84. Thereafter, the composite container 10A is transported to the ink curing wheel 85, where the ink is UV cured, for example. Thus, printing is applied to the outside of the plastic member 40.

  Thus, the composite container 10A shown in FIG. 1 is obtained. In this case, since the print area 43 itself is not expanded, the print area 43 can be clearly displayed. The timing of printing on the outside of the composite container 10A may be before the content container is filled with the content container, or may be after the content container is filled with the content container and sealed.

  In the above, although the case where printing was given to the outer side of the plastic member 40 after expanding the preform 10a and the plastic member 40a integrally was described as an example, it is not limited to this. For example, the composite preform 70 (FIG. 3) may be produced by providing a plastic member 40a to which printing has been applied in advance on the outside or inside of the preform 10a. After that, by subjecting the composite preform 70 to blow molding, the printing area 43a may be stretched together with the plastic member 40a, and the printing area 43 may be formed.

  In this case, printing may be repeated several times repeatedly. As a result, even after the printing area 43a is stretched after blow molding, the printing area 43 can be clearly displayed. Although the ink used for printing is not limited, it is preferable to use a highly extensible ink so that the printing area 43 can be clearly displayed even after being drawn by biaxial stretch blow molding. Examples of such highly stretchable inks include UV curable inks and EB curable inks.

  Alternatively, a non-printed plastic member 40a may be provided on the outside of the preform 10a first, and printing may be performed on the outside of the plastic member 40a before blow molding. After that, by subjecting the composite preform 70 to blow molding, the printing area 43a may be stretched together with the plastic member 40a, and the printing area 43 may be formed.

Modified Example of Method of Manufacturing Composite Container Next, with reference to FIGS. 8A to 8G, a modified example of a method of manufacturing a composite container 10A (blow molding method) according to the present embodiment will be described. In the modification shown in FIGS. 8A to 8G, the plastic member (outside shrinking member) 40a has a function to shrink with respect to the preform 10a, and the other configuration is shown in FIG. 5A. It is substantially the same as the embodiment shown in (g). In FIGS. 8 (a) to 8 (g), the same parts as those in FIGS. 5 (a) to 5 (g) are assigned the same reference numerals and detailed explanations thereof will be omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 8A).

  Next, a plastic member (outer shrinking member) 40a is provided on the outside of the preform 10a (see FIG. 8 (b)). In this case, the plastic member (outside shrinking member) 40 a has a cylindrical shape with a bottom as a whole, and has a cylindrical body 41 and a bottom 42 connected to the body 41. The plastic member (outside shrinking member) 40 is mounted so as to cover the entire area of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire area of the bottom portion 30a.

  Next, the preform 10a and the plastic member (outer shrinking member) 40a are heated by the heating device 51 (see FIG. 8 (c)). At this time, the preform 10a and the plastic member (outside shrinking member) 40a are uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth 11a facing downward. The heating temperature of the preform 10a and the plastic member (outside shrinking member) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  Thus, when the plastic member (outer shrinking member) 40a is heated, the plastic member (outer shrinking member) 40a is thermally shrunk and closely attached to the outside of the preform 10a (see FIG. 8 (c)). . When the plastic member (outer shrinking member) 40a itself has a shrinking property, the plastic member (outer shrinking member) 40a is provided on the outer side of the preform 10a (see FIG. 8B). (Outside contraction member) 40a may be in close contact with the outside of the preform 10a.

  Subsequently, the preform 10a and the plastic member (outer shrinking member) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 8 (d)).

  The preform 10a and the plastic member (outside shrinking member) 40a are molded using the blow molding die 50, and are substantially the same as the container body 10 in the same manner as in the case of FIGS. 5 (a) to 5 (g) described above. The composite container 10A provided with the plastic member (outside contraction member) 40 provided on the outer surface of the container main body 10 is obtained (see FIGS. 8 (d) to 8 (f)). Thereafter, printing is performed on the outside of the expanded plastic member 40 using a printer 80 to form a printing area 43 (FIG. 8 (g)).

  Next, with reference to FIGS. 9 (a) to 9 (h), another modified example of the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment will be described. In the modification shown in FIGS. 9 (a) to 9 (h), the plastic member (outer shrinking member) 40a has a function to shrink with respect to the preform 10a, and the preform 10a and the plastic member (outer shrinking member) 40a Is heated in two stages, and the other configuration is substantially the same as the configuration shown in FIGS. 5 (a) to 5 (g). In FIGS. 9A to 9H, the same parts as those in FIGS. 5A to 5G are assigned the same reference numerals and detailed explanations thereof will be omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 9A).

  Next, a plastic member (outside shrinking member) 40a is provided on the outside of the preform 10a (see FIG. 9B).

  Next, the preform 10a and the plastic member (outer shrinking member) 40a are heated by the first heating device 55 (see FIG. 9 (c)). At this time, the heating temperature of the preform 10a and the plastic member (outside shrinking member) 40a may be, for example, 50 ° C to 100 ° C.

  By heating the plastic member (outer shrinking member) 40a, the plastic member (outer shrinking member) 40a is thermally shrunk to be in close contact with the outside of the preform 10a. Thereby, a composite preform 70 having the preform 10a and the plastic member (outside shrinking member) 40a closely attached to the outside of the preform 10a is obtained (see FIG. 9C).

  As described above, the composite preform 70 is manufactured by bringing the plastic member (outside shrinking member) 40a into heat contact with the outside of the preform 10a in advance by using the first heating device 55 to produce the composite preform 70. 9 (a) to (c) of FIG. 9 and a series of steps (FIG. 9 (d) to (h)) of fabricating the composite container 10A by blow molding at different places (factory etc.) Can be implemented in

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 9D). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while rotating with the mouth 11 a facing downward. The heating temperature of the preform 10a and the plastic member (outside shrinking member) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 9E). In this case, heating for thermally shrinking the plastic member (outside shrinking member) 40a and heating for blow molding the preform 10a can be performed in the same step.

  The composite preform 70 is molded using the blow molding die 50, and provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the case of FIGS. 5 (a) to 5 (g) described above. The composite container 10A provided with the plastic member (outside shrinking member) 40 is obtained (see FIGS. 9E to 9G). Thereafter, printing is performed using the printer 80 on the outside of the expanded plastic member 40 to form a printing area 43 (FIG. 9 (h)).

  In FIGS. 8 (a) to 8 (g) and 9 (a) to 9 (h), after the preform 10a and the plastic member 40a are integrally expanded, printing is applied to the outside of the plastic member 40. However, it is not limited to this. A plastic member 40a to which printing has been applied may be provided outside the preform 10a, or after providing a plastic member 40a outside the preform 10a (FIG. 8 (c), FIG. 9 (c) ), The outside of the plastic member 40a may be printed.

  As described above, according to the present embodiment, the preform 10a of the composite preform 70 and the plastic member 40a are integrated by performing blow molding on the composite preform 70 in the blow molding die 50. The composite container 10A having the container body 10 and the plastic member 40 is manufactured. Thereby, the preform 10a (container main body 10) and the plastic member 40a (plastic member 40) can be configured as separate members. Therefore, various functions and characteristics can be freely imparted to the composite container 10A by appropriately selecting the type and shape of the plastic member 40.

  Further, according to the present embodiment, when producing the composite container 10A, since a general blow molding device can be used as it is, it becomes necessary to prepare a new molding facility for producing the composite container 10A. Absent. Further, since the plastic member 40a is provided on the outside of the preform 10a, it is not necessary to prepare a new molding facility for molding the preform 10a.

  Further, according to the present embodiment, since printing is performed on the plastic member 40, the printing area 43 is provided in advance in the composite container 10A at the stage of manufacturing the composite container 10A using the preform 10a. Can be Therefore, after the composite container 10A is filled with the content liquid and sealed, it is not necessary to provide a step of applying a label by a labeler. This can reduce the manufacturing cost for manufacturing the final product. In addition, it is possible to prevent a decrease in yield when manufacturing the final product due to a defect of a labeler or the like.

  Furthermore, according to the present embodiment, since the plastic member 40 subjected to printing can be separated and removed from the container main body 10, the colorless and transparent container main body 10 can be recycled as in the conventional case. On the other hand, when direct printing is performed on the container body 10 as a comparative example, there is a possibility that recycling of the container body 10 becomes difficult.

Modification of Composite Container and Composite Preform Next, a modification of the present embodiment will be described with reference to FIGS. 10 and 11. FIG.

  The modification shown in FIGS. 10 and 11 does not have a body and a bottom as the plastic member 40a, but uses a cylindrical plastic member 40a.

  In the composite container 10A shown in FIG. 10, the plastic member 40 extends from the shoulder 12 to the lower part of the body 20 of the container body 10 but does not reach the bottom 30. Further, in the composite preform 70 shown in FIG. 11, the plastic member 40a is in close contact so as to cover only the body portion 20a of the preform 10a, and more specifically, the neck portion 13 of the container body 10 in the body portion 20a. The region except for the portion 13a corresponding to the portion and the portion corresponding to the lower portion of the body portion 20a is covered.

  10 and FIG. 11, the other configuration is substantially the same as the embodiment shown in FIG. 1 to FIG. In the modification shown in FIGS. 10 and 11, the same parts as those of the embodiment shown in FIGS. 1 to 9 are designated by the same reference numerals and their detailed description will be omitted. Further, the configuration and manufacturing method of the composite container 10A, and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiment shown in FIGS. 1 to 9, and thus detailed description will be omitted. Moreover, in FIG. 10 and FIG. 11, you may use what has the effect | action which the plastic members 40 shrink | contract with respect to the preform 10a.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. 12 to 19 show the second embodiment of the present invention. In the second embodiment shown in FIGS. 12 to 19, an inner label member 60 (inner label member 60a) is provided between the container body 10 (preform 10a) and the plastic member 40 (plastic member 40a). It is provided. In FIGS. 12 to 19, the same parts as those of the first embodiment are indicated by the same reference numerals and the detailed description will be omitted.

  First, an outline of the composite container according to the present embodiment will be described with reference to FIGS. 12 and 13.

  The composite container 10A shown in FIGS. 12 and 13 is a composite preform 70 (see FIG. 14) including a preform 10a, an inner label member 60a and a plastic member 40a using a blow mold 50 as described later. On the other hand, it is obtained by integrally expanding the preform 10a of the composite preform 70, the inner label member 60a and the plastic member 40a by performing biaxial stretch blow molding.

  Such a composite container 10A is provided in close contact with the outer side of the inner label member 60 and the inner label member 60 provided in close contact with the outer side of the container body 10 made of a plastic material and located in the inner side. And a plastic member 40.

  Among these, the inner label member 60 is in close contact with the outer surface of the container body 10 in a thinly extended state, and is in close contact with the container body 10 so as not to easily move or rotate.

  Also, the plastic member 40 is in close contact with the outer surface of the container body 10 and the outer surface of the inner label member 60 in a thinly extended state, and is in close contact with the container body 10 so as not to move or rotate easily. There is.

  At least a portion of the plastic member 40 is considered to be translucent or transparent, and in this case, the inner label member 60 can be viewed from the outside through the translucent or transparent portion. The plastic member 40 may be entirely translucent or transparent, or may have an opaque portion and a translucent or transparent portion (e.g., a window portion).

  Next, the inner label member 60 will be described. The inner label member 60 (60a) is provided so as to surround the outside of the preform 10a as described later, and is obtained by biaxial stretch blow molding integrally with the preform 10a and the plastic member 40a. It is a thing.

  The inner label member 60 is attached without being adhered to the outer surface of the container body 10 and is in close contact with the container body 10 so as not to move or rotate. The inner label member 60 is thinly extended on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 13, the inner label member 60 is provided over the entire circumferential direction so as to surround the container body 10 and has a substantially circular horizontal cross section.

  In this case, the inner label member 60 is provided to cover the shoulder 12, the body 20 and the bottom 30 except for the mouth 11 and the neck 13 in the container body 10. Thereby, desired characters, images and the like can be given to the shoulder portion 12, the body portion 20 and the bottom portion 30 of the container body 10, and the composite container 10A can be decorated or information can be displayed.

  The inner label member 60 may be provided in the entire area or a partial area of the container body 10 other than the mouth 11. For example, the inner label member 60 may be provided so as to cover the whole of the neck portion 13, the shoulder portion 12, the body portion 20 and the bottom portion 30 of the container body 10 excluding the mouth portion 11. Furthermore, the number of inner label members 60 is not limited to one, and may be plural. The inner label member 60 may be provided in the same area as the plastic member 40 or may be provided in an area narrower than the plastic member 40. In the latter case, the inner label member 60 is preferably completely covered by the plastic member 40.

  The thickness of the inner label member 60 is not limited to this, but can be, for example, about 1 μm to 100 μm in a state of being attached to the container main body 10.

  The plastic member 40 is attached without being adhered to the outer surface of the inner label member 60, and is in close contact with the container body 10 so as not to move or rotate. A printing area 43 is provided on the outside or inside of the plastic member 40 by printing. In the present embodiment, a plastic member 40 to which printing is applied is provided on the outside of the inner label member 60. As a result, the design of the image, characters and the like of the inner label member 60 and the design of the image, characters and the like of the plastic member 40 can be superimposed and displayed.

  For example, by using a colored one as the inner label member 60, it may be made to have a light beam barrier property of a specific wavelength, while the plastic member 40a may display character information such as a brand name and raw materials . Further, by changing the combination of the design of the inner label member 60 and the design of the plastic member 40, the appearance of the composite container 10A can be made rich in variations. Furthermore, a unique design can be realized in which the design of the inner label member 60 and the design of the plastic member 40 are superimposed.

  In addition to this, the configurations of the container body 10 and the plastic member 40 are substantially the same as in the case of the above-described first embodiment, and thus detailed description will be omitted here.

  Next, the configuration of the composite preform according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 14, the composite preform 70 includes a preform 10a made of a plastic material, a bottomed cylindrical inner label member 60a closely attached to the outside of the preform 10a, and an inner label member 60a. And a bottomed cylindrical plastic member 40a provided in close contact with the outside.

  The inner label member 60a is in intimate contact with the outer surface of the preform 10a, and is in intimate contact with the preform 10a so as not to move or rotate easily, or in a manner such that it does not fall by its own weight. The inner label member 60a is provided over the entire circumferential direction so as to surround the preform 10a, and has a substantially circular horizontal cross section.

  The inner label member 60a may be previously designed or printed. For example, character information such as the name of the content liquid, the manufacturer, the name of the raw material, and the like may be described in addition to the symbol and the product name. In this case, it is possible to display an image or characters on the composite container 10A without separately applying a label or the like to the container body 10 after blow molding. For example, the inner label member 60a may be provided on all or part of the body 20a of the preform 10a, and an image or characters may be displayed on the body 20 of the container body 10 after molding. As a result, since the step of attaching a label using a labeler after sealing the container is unnecessary, the manufacturing cost can be suppressed, and the yield can be prevented from decreasing.

  As such an inner label member 60a, a film of polyester resin, polyamide resin, polyaramid resin, polypropylene resin, polycarbonate resin, polyacetal resin, fluorine resin or the like can be used. The inner label member 60a may be made of the same material as the container body 10 (preform 10a) and / or the plastic member 40a, or may be made of a different material.

  On the other hand, the plastic member 40a is attached without being adhered to the outer surface of the inner label member 60a, and is in close contact with the preform 10a such that it does not move or rotate or does not drop by its own weight. It is done. Moreover, the printing area | region 43a to which printing was given may be provided in the outer side or inner side of the plastic members 40a.

  The inner label member 60a and the plastic member 40a may be provided in the whole area or a partial area other than the opening 11a. For example, the inner label member 60a and the plastic member 40a may be provided so as to cover the whole of the body 20a and the bottom 30a except for the mouth 11a. Furthermore, the inner label member 60a and the plastic member 40a are not limited to one each, and a plurality of them may be provided. For example, two inner label members 60a and plastic members 40a may be provided at two places on the outside of the body 20a.

  In addition to this, the configurations of the preform 10a and the plastic member 40a are substantially the same as those of the first embodiment described above, and thus detailed description will be omitted here.

  Next, with reference to FIGS. 15 (a) to 15 (g), a method of manufacturing a composite container 10A (a blow molding method) according to the present embodiment will be described.

  First, a preform 10a made of a plastic material is prepared (see FIG. 15 (a)).

  Next, an inner label member 60a is provided on the outside of the preform 10a, and a plastic member 40a is provided on the outside of the inner label member 60a. Thereby, a composite preform 70 having a preform 10a, an inner label member 60a closely attached to the outer side of the preform 10a, and a plastic member 40a closely attached to the outer side of the inner label member 60a is manufactured (FIG. 15). (B)). In this case, the inner label member 60 a has a cylindrical shape with a bottom as a whole, and has a cylindrical body 61 and a bottom 62 connected to the body 61.

  At this time, even if the inner label member 60a and the plastic member 40a having an inner diameter which is the same as or slightly smaller than the outer diameter of the preform 10a are pressed against the preform 10a, they are adhered to the outer surface of the preform 10a. good. Alternatively, a heat shrinkable inner label member 60a and a plastic member 40a are provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a are thermally shrunk by heating to 50 ° C. to 100 ° C. It may be in close contact with the outer surface of the preform 10a.

  Alternatively, a plastic member 40a may be provided in advance around the inner label member 60a, and the inner label member 60a and the plastic member 40a may be integrally attached to the outside of the preform 10a. Alternatively, the inner label member 60a may be provided on the outside of the preform 10a, and then the plastic member 40a may be provided on the outside of the inner label member 60a.

  As described above, the plastic member 40a is brought into close contact with the outside of the preform 10a and the inner label member 60a in advance, and the composite preform 70 is manufactured, whereby a series of steps of manufacturing the composite preform 70 (FIG. It becomes possible to implement a)-(b) and a series of processes (Drawing 15 (d)-(g)) which produce composite container 10A by blow molding in a separate place (a factory etc.).

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 15C).

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow molding die 50. The composite container 10A is molded using the blow molding die 50, and in substantially the same manner as in the case of the first embodiment described above, the container body 10 and the inner label member provided on the outer surface of the container body 10. As a result, a composite container 10A is obtained, which comprises 60 and a plastic member 40 provided on the outside of the inner label member 60 (see FIGS. 15 (d)-(f)). Thereafter, printing is performed on the outside of the expanded plastic member 40 using a printer 80 to form a printing area 43 (FIG. 15 (g)).

  In addition to this, the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment is substantially the same as in the case of the first embodiment described above, and thus detailed description will be omitted here.

  In FIGS. 15 (a) to 15 (g), after the preform 10a, the inner label member 60a, and the plastic member 40a are integrally expanded, printing is performed on the outer side of the plastic member 40. It is not something that can be done. A pre-printed plastic member 40a may be provided on the outer side of the inner label member 60a, or after providing the plastic member 40a on the outer side of the inner label member 60a, printing may be performed on the outer side of the plastic member 40a. You may

Modifications of Blow Molding Method FIGS. 16A to 16G and FIGS. 17A to 17H are diagrams showing modifications of the method of manufacturing the composite container 10A according to the present embodiment (the blow molding method). It is. In FIGS. 16 (a) to 16 (g) and FIGS. 17 (a) to 17 (h), the same parts as those in FIGS. 1 to 15 are assigned the same reference numerals and detailed explanations thereof will be omitted.

  In the modification shown in FIGS. 16A to 16G, the inner label member 60 is provided on the outer side of the preform 10a, and the plastic member (outer shrinking member) 40a is provided on the outer side of the inner label member 60. The other configurations are substantially the same as those shown in FIGS. 8 (a) to 8 (g).

  In the modification shown in FIGS. 17A to 17H, the inner label member 60 is provided on the outer side of the preform 10a, and the plastic member (outer shrinking member) 40a is provided on the outer side of the inner label member 60. The other configurations are substantially the same as those shown in FIGS. 9 (a) to 9 (h).

  Also in FIGS. 16 (a) to 16 (g) and 17 (a) to 17 (h), after the preform 10a, the inner label member 60a and the plastic member 40a are integrally expanded, the outside of the plastic member 40 is obtained. Printing is applied, but it is not limited to this. A pre-printed plastic member 40a may be provided on the outer side of the inner label member 60a, or after providing the plastic member 40a on the outer side of the inner label member 60a, printing may be performed on the outer side of the plastic member 40a. You may

Modification of Composite Container and Composite Preform Next, a modification of the present embodiment will be described with reference to FIGS. 18 and 19.

  The modification shown in FIGS. 18 and 19 does not have a body and a bottom as the inner label member 60a and the plastic member 40a, but uses the cylindrical inner label member 60a and the plastic member 40a. . The other configuration is substantially the same as the embodiment shown in FIGS. In the modification shown in FIGS. 18 and 19, the same parts as those of the embodiment shown in FIGS. 12 to 17 are designated by the same reference numerals and their detailed description will be omitted. Further, the method of manufacturing the composite container 10A and the method of manufacturing the composite preform 70 are also substantially the same as those of the embodiment shown in FIGS. 12 to 17, and thus detailed description will be omitted.

DESCRIPTION OF SYMBOLS 10 container main body 10A composite container 10a preform 11, 11a opening 12 shoulder 13 neck 14 screw 17 flange 20, 20a body 30, 30a bottom 31 recess 32 ground portion 40, 40a plastic member 41 body 42 bottom 50 blow molding dies 60, 60a inner label member 70 composite preform

Claims (10)

In the method of manufacturing a composite container,
Preparing a preform made of a plastic material;
After loosely inserting a plastic member made of a heat-shrinkable material into the preform, it is thermally shrunk so that at least a part of the outside of the body and the bottom of the preform is seamed in advance in the circumferential direction Mounting the cylindrically formed plastic member without adhesion;
Expanding the preform and the plastic member integrally by blow molding the preform and the plastic member;
And a step of printing only on the outer surface of the plastic member after the preform and the plastic member are integrally expanded.   2. A method of manufacturing a composite container according to claim 1, wherein after the preform and the plastic member are integrally expanded, printing is performed only on the outer surface of the plastic member before filling the content liquid. .   2. A method of manufacturing a composite container according to claim 1, wherein the preform and the plastic member are integrally expanded, filled with a content liquid, and then printing is performed only on the outer surface of the plastic member.   The method for producing a composite container according to any one of claims 1 to 3, wherein printing is performed on the plastic member by an inkjet method. The method further comprises the step of providing an inner label member so as to surround the outside of the preform,
The method for manufacturing a composite container according to any one of claims 1 to 4, wherein the plastic member is provided outside the inner label member.   The method for producing a composite container according to any one of claims 1 to 5, wherein the ink used for the printing is a UV curable ink or an EB curable ink. In the composite container on which printing is given,
Container body made of plastic material,
A heat-shrinkable plastic, which is formed in a cylindrical shape having no joint in the circumferential direction, and is closely attached without being adhered to the outside of at least a part of the outside and the bottom of the body of the container body. Equipped with
The container body and the plastic member are integrally expanded by blow molding,
A composite container, wherein printing is applied only to the outer surface of the plastic member.   The composite container according to claim 7, wherein the plastic member is printed by an inkjet method.   8. The apparatus according to claim 7, further comprising an inner label member closely provided so as to surround the outer side of the container body, wherein the plastic member is provided in close contact with the outer side of the inner label member. Or a composite container according to 8.   The composite container according to any one of claims 7 to 9, wherein the ink used for the printing is a UV curable ink or an EB curable ink.

Images