JP2016120681A - Composite container and manufacturing method thereof, composite preform and plastic member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite container and a manufacturing method thereof, a preform and a composite preform, capable of imparting various functions or features to a container and allowing various designs.SOLUTION: First, a preform 10a made of a plastic material is prepared, and a plastic member 40a is disposed so as to surround outside the preform 10a. Thereby a composite preform 70 having the preform 10a and the plastic member 40a in close contact with outside the preform 10a is produced. The composite preform 70 is then heated and inserted inside a blow molding mold 50, blow molding is applied to the composite preform 70 inside the blow molding mold 50, and thereby the preform 10a and the plastic member 40a of the composite preform 70 are integrally expanded so that a composite container 10A is obtained. The plastic member 40a includes a printing area 43a with printing applied on a surface thereof.SELECTED DRAWING: Figure 1

Description

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

  Recently, plastic bottles for storing content liquids such as foods and drinks have become common, and such plastic bottles store content liquids.

  A plastic bottle containing such a content liquid is manufactured by inserting a preform into a mold and biaxially 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 form a container shape. However, in the conventional biaxial stretch blow molding method, the preform is generally simply formed into a container shape. For this reason, when various functions and characteristics (barrier property, heat retaining property, etc.) are given to the container, the means is limited, for example, by changing the material constituting the preform. In particular, it is difficult to have different functions and characteristics depending on the part of the container (for example, the trunk and the bottom).

JP 2009-241526 A

  The present invention has been made in consideration of such points, and provides a composite container, a method for manufacturing the composite container, a composite preform, and a plastic member capable of imparting various functions and characteristics to the container. The purpose is to do.

The present invention relates to a method for producing a composite container,
Preparing a preform made of plastic material;
Providing a plastic member on the outside of the preform;
Providing a printing area on the surface of the plastic member;
Heating the preform and the plastic member and inserting it into a blow mold; and
And a step of expanding the preform and the plastic member integrally by performing blow molding on the preform and the plastic member in the blow molding die. It is a manufacturing method.

The present invention relates to a method for producing a composite container,
Preparing a preform made of plastic material;
A step of providing a plastic member having a printing area provided on the surface in advance on the outside of the preform;
Heating the preform and the plastic member and inserting it into a blow mold; and
A composite container comprising: a step of blow-molding the preform and the plastic member in the blow-molding mold so as to integrally expand the preform and the plastic member. It is a manufacturing method.

  The present invention is the method for manufacturing a composite container, wherein the printing region is formed by an ink jet method.

  The present invention is the method for manufacturing a composite container, wherein the printing region is formed using an ink containing a thermosetting resin and / or an ionizing radiation curable resin.

  Before the step of providing the printing area on the surface of the plastic member, the composite further comprising the step of providing an anchor coat layer on the surface of the plastic member, where the printing area is provided. It is a manufacturing method of a container.

  The present invention is a method for manufacturing a composite container, further comprising a step of providing a protective layer on the printing region.

  The present invention is a composite container obtained by the above method.

The present invention relates to a composite preform,
A preform made of plastic material,
A plastic member provided to surround the outside of the preform,
The plastic member is a composite preform characterized in that the plastic member is in close contact with the outside of the preform, and a printing region is provided on the surface thereof.

  The present invention is the composite preform characterized in that the printing region is formed by an ink jet method.

  The present invention is the composite preform, wherein the printing region is formed using an ink containing a thermosetting resin and / or an ionizing radiation curable resin.

  The present invention is the composite preform, wherein the plastic member is further provided with an anchor coat layer between the printing region and the surface of the plastic member.

  The present invention is the composite preform, wherein the plastic member is further provided with a protective layer on the printing region.

The present invention provides a composite container that is mounted so as to surround the outer side of the preform and is heated together with the preform, and includes the preform and a plastic member that is in close contact with the outer side of the preform. A plastic member for manufacturing,
It is a plastic member characterized by having a cylindrical body part covering at least the body part of the preform and having a printing area on the surface thereof.

  The present invention is the plastic member characterized in that the printing region is formed by an ink jet method.

  The present invention is the plastic member, wherein the printing region is formed using an ink containing a thermosetting resin and / or an ionizing radiation curable resin.

  The present invention is the plastic member, wherein the plastic member is further provided with an anchor coat layer between the printing region and the surface of the plastic member.

  The present invention is the plastic member, wherein the plastic member is further provided with a protective layer on the printing region.

  According to the present invention, the preform of the composite preform and the plastic member are expanded integrally by performing blow molding on the composite preform in the blow mold. For this reason, the preform (container body) and the plastic member can be formed of different members, and various functions and characteristics can be imparted to the composite container by appropriately selecting the type and shape of the plastic member. it can. Moreover, since the plastic member of the composite preform is printed on the surface thereof, the composite container in which the plastic member is expanded is also printed. This eliminates the need for a labeling process using a labeler after the container is tightly sealed, so that the manufacturing cost can be suppressed and the yield can be prevented from decreasing.

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 showing the composite container according to the first embodiment of the present invention (sectional view taken along the line II-II in FIG. 1). FIG. 3 is a vertical sectional view showing the composite preform according to the first embodiment of the present invention. 4A to 4D are perspective views showing various plastic members. FIG. 5 is a schematic diagram illustrating an example of a printer that performs printing on a composite preform. FIG. 6 is a schematic diagram illustrating another example of a printer that performs printing on a composite preform. FIGS. 7A to 7G are schematic views showing a blow molding method according to the first embodiment of the present invention. FIGS. 8A to 8G are schematic views showing a blow molding method according to a modification of the first embodiment of the present invention. 9A to 9H are schematic views showing a blow molding method according to a modification of the first embodiment of the present invention. FIG. 10 is a partial vertical sectional view showing a modification of the composite container according to the first embodiment of the present invention. FIG. 11 is a vertical sectional view showing a modification of the composite preform according to the first embodiment of the present invention. 12 (a) to 12 (g) are schematic views showing a modification of the blow molding method according to the first embodiment of the present invention. FIG. 13 is a partial vertical sectional view showing a composite container according to the second embodiment of the present invention. FIG. 14 is a horizontal sectional view (cross-sectional view taken along line XIV-XIV in FIG. 11) showing a composite container according to the second embodiment of the present invention. FIG. 15 is a vertical sectional view showing a composite preform according to the second embodiment of the present invention. FIGS. 16A to 16D are perspective views showing various inner label members and various plastic members. FIGS. 17A to 17G are schematic views showing a blow molding method according to the second embodiment of the present invention. 18 (a) to 18 (g) are schematic views showing a blow molding method according to a modification of the second embodiment of the present invention. FIGS. 19A to 19H are schematic views showing a blow molding method according to a modification of the second embodiment of the present invention. FIG. 20 is a partial vertical sectional view showing a modification of the composite container according to the second embodiment of the present invention. FIG. 21 is a vertical sectional view showing a modification of the composite preform according to the second embodiment of the present invention. 22 (a) to 22 (g) are schematic views showing a modification of the blow molding method according to the second embodiment of the present invention.

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 to 12 are views showing a first embodiment of the present invention.

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

  A composite container 10A shown in FIGS. 1 and 2 is biaxially stretched with respect to a composite preform 70 (see FIG. 3) including a preform 10a and a plastic member 40a using a blow molding die 50, as will be described later. By performing blow molding, the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded, and the surface of the plastic member 40 is printed (printing region). 43). The print area 43 may be provided in the entire region of the plastic member 40 or may be provided in a part.

  Such a composite container 10A includes a container body 10 made of a plastic material positioned inside, and a plastic member 40 provided in close contact with the outside of the container body 10 and having a surface printed thereon.

  Among these, the container body 10 includes a mouth portion 11, a neck portion 13 provided below the mouth portion 11, a shoulder portion 12 provided below the neck portion 13, a trunk portion 20 provided below the shoulder portion 12, 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 main body 10 in a thinly extended state, and is attached to the container main body 10 without being easily moved or rotated.

  Next, the container body 10 will be described in detail. As described above, the container body 10 includes the mouth portion 11, the neck portion 13, the shoulder portion 12, the trunk portion 20, and the bottom portion 30.

  Of these, the mouth portion 11 includes a screw portion 14 screwed into a cap (not shown) and a flange portion 17 provided below the screw portion 14. The shape of the mouth portion 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 having a substantially uniform diameter. The shoulder 12 is located between the neck 13 and the trunk 20 and has a shape whose diameter gradually increases from the neck 13 toward the trunk 20.

  Furthermore, the trunk | drum 20 has a cylindrical shape with 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. Or the trunk | drum 20 may have a cylinder shape with a horizontal cross section which is not uniform toward upper direction from the downward direction. Moreover, in this Embodiment, although the unevenness | corrugation is not formed in the trunk | drum 20, and has a substantially flat surface, it is not restricted 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 concave portion 31 located in the center and a grounding portion 32 provided around the concave portion 31. The shape of the bottom 30 is not particularly limited, and may have a conventionally known bottom shape (for example, a petaloid bottom shape or a round bottom shape).

  Moreover, although the thickness of the container main body 10 in the trunk | drum 20 is not limited to this, For example, it can be made thin to about 50 micrometers-250 micrometers. Further, the weight of the container body 10 is not limited to this, but can be 10 g to 20 g. Thus, by reducing the thickness of the container main body 10, the weight of the container main body 10 can be reduced.

  Such a container main body 10 can be manufactured by biaxially stretching 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, a thermoplastic resin, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), or PC (polycarbonate) may be used. preferable. Moreover, you may blend and use the various resin mentioned above. The container body 10 may be colored in colors such as red, blue, yellow, green, brown, black, and white, but is preferably colorless and transparent in consideration of ease of recycling. Further, 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 in order to enhance the barrier property of the container.

  The container body 10 can also be formed as a multilayer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer has 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). You may form as a multilayer bottle which has gas barrier property and light-shielding property by extrusion-molding preform 10a which consists of three or more layers as resin which it has (intermediate layer), and carrying out blow molding. As the intermediate layer, a resin obtained by blending the above-described various resins may be used.

  Further, by mixing an inert gas (nitrogen gas, argon gas) with the thermoplastic resin melt, 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 contains the foam cell, the light shielding property of the container main body 10 whole can be improved.

  Such a container main body 10 may consist of a bottle with a full capacity of 100 ml to 2000 ml, for example. Alternatively, the container main body 10 may be a large bottle having a full capacity of, for example, 10L to 60L.

  Next, the plastic member 40 will be described. As will be described later, the plastic member 40 (40a) is provided so as to surround the outer side of the preform 10a. It is a thing. In addition, the surface is printed.

  The plastic member 40 is attached to the outer surface of the container body 10 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. The plastic member 40 is thinly extended on the outer surface of the container body 10 to cover the container body 10. 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 portion 12, the trunk portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11 and the neck portion 13. Thereby, desired functions and characteristics can be imparted to the shoulder portion 12, the trunk portion 20, and the bottom portion 30 of the container body 10.

  The plastic member 40 may be provided in the entire region or a partial region other than the mouth portion 11 of the container body 10. For example, the plastic member 40 may be provided so as to cover the neck portion 13, the shoulder portion 12, the trunk portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11. Further, the number of plastic members 40 is not limited to one, and a plurality of plastic members 40 may be provided. For example, you may provide the two plastic members 40 in the outer surface of the shoulder part 12, and the outer surface of the bottom part 30, respectively.

  On the other hand, since the plastic member 40 is not welded or bonded to the container body 10, it can be peeled off from the container body 10 and removed. Specifically, for example, the plastic member 40 may be cut using a blade or the like, or a cutting line (not shown) may be provided in advance on the plastic member 40, and the plastic member 40 may be peeled along the cutting line. it can. Thereby, since the printed plastic member 40 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.

  Moreover, although the thickness of the plastic member 40 is not limited to this, For example, it can be set as about 5 micrometers-50 micrometers in the state attached to the container main body 10. FIG.

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

  As shown in FIG. 3, the composite preform 70 is provided with a preform 10a made of a plastic material, and a bottomed surface provided with printing on the surface thereof, that is, provided with a printing region 43a. And a cylindrical plastic member 40a.

  Among these, the preform 10a includes a mouth portion 11a, a body portion 20a connected to the mouth portion 11a, and a bottom portion 30a connected to the body portion 20a. Of these, the mouth portion 11 a corresponds to the mouth portion 11 of the container body 10 described above, and has substantially the same shape as the mouth portion 11. Moreover, the trunk | drum 20a respond | corresponds to the neck part 13, the shoulder part 12, and the trunk | drum 20 of the container main body 10 mentioned above, and has a substantially cylindrical shape. The bottom 30a 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 bonded, and is in close contact with the preform 10a so as not to move or rotate, or in close contact with the preform 10a so as not to 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 region of the body portion 20a excluding the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  The plastic member 40a may be provided in the entire region or a partial region other than the mouth portion 11a. For example, the plastic member 40a may be provided so as to cover the entire 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 plastic members 40a may be provided. For example, two plastic members 40a may be provided at two locations outside the trunk portion 20a.

  Such a plastic member 40a may be one that does not have a contracting action on the preform 10a or may have a contracting action. After blow molding, the plastic member 40a has a function of contracting with respect to the preform 10a from the viewpoint of less air entering between the container body and the plastic member 40, that is, high adhesion. It is preferable that it is a thing (shrinkable tube).

  In the former case, as the plastic member 40a, for example, a blow tube produced by blow molding, a sheet molded tube produced by sheet molding, an extruded tube produced by extrusion molding, an inflation molded tube produced by inflation molding, An injection-molded tube or the like can be used, but is not limited to this, and a molding method other than the above may be used.

  On the other hand, when the plastic member (shrinkable tube) 40a has a contracting action, the plastic member (shrinkable tube) 40a is applied to the preform 10a when an external action (for example, heat) is applied, for example. What shrinks (for example, heat shrinks) may be used. Alternatively, the plastic member (shrinkable tube) 40 itself may be shrinkable or elastic and can be shrunk without applying an external action.

  The plastic member 40a may be composed of multiple layers as described above. For example, the main components constituting the innermost and outermost layers may be the same or different. Specific examples of the layer structure include, from the innermost surface, low density PE / adhesive layer / EVOH / adhesive layer / low density PE, and PP / adhesive layer / EVOH / adhesive layer / PP. Examples of the adhesive constituting the adhesive layer include a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, Examples thereof include polyamide adhesives, polyimide adhesives, amino resin adhesives, phenol resin adhesives, epoxy adhesives, polyurethane adhesives, rubber adhesives, and silicone adhesives.

  The plastic member 40a is, for example, polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS tree, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyvinyl. Alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, 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 MXD6, aromatic polyamide, Recarbonate, Poly (ethylene terephthalate), Poly (ethylene terephthalate), Poly (ethylene naphthalate), U polymer, Liquid crystal polymer, Modified polyphenylene ether, Polyether ketone, Polyether ether ketone, Unsaturated polyester, Alkyd resin, Polyimide, Polysulfone, Polyphenylene sulfide It can be produced using a resin material comprising polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, epoxy resin and the like. Among these, it is preferable to include thermoplastic inelastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). The resin material may include a copolymer obtained by polymerizing two or more monomer units constituting the above-described resin. Furthermore, the resin material may comprise two or more of the above-described resins. Also, by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, a foam member having a foam cell diameter of 0.5 to 100 μm is used, and this foam preform is molded. , The light shielding property can be improved.

  In addition, the plastic member 40 (40a) may contain various additives in addition to the above-mentioned resin as the main component within a range where the characteristics are not impaired. Examples of additives include plasticizers, UV stabilizers, anti-coloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, yarn friction reducing agents, slip agents, mold release agents, An oxidizing agent, an ion exchange agent, a coloring pigment, and the like can be added. Also, by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, a foam member having a foam cell diameter of 0.5 to 100 μm is used, and this foam preform is molded. , The light shielding property can be improved.

  Moreover, the plastic member 40 (40a) may contain the same material as the container main body 10 (preform 10a). Moreover, when the plastic member 40 (40a) consists of multiple layers, the plastic member 40 (40a) may include a layer made of the same material as the container body 10 (preform 10a). In this case, in the composite container 10A, for example, the plastic member 40 can be intensively arranged at a portion where the strength is to be increased, and the strength of the portion can be selectively increased. For example, plastic members 40 may be provided around the shoulder 12 and the bottom 30 of the container body 10 to increase the strength of this portion. Examples of such materials include thermoplastic resins, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate).

  The plastic member 40 (40a) may contain a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. Further, when the plastic member 40 (40a) is formed of multiple layers, the plastic member 40 (40a) may include a layer made of a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. In this case, without using a multi-layer preform or a preform containing a blend material as the preform 10a, the gas barrier property of the composite container 10A is improved, oxygen is prevented from entering the container, and the content liquid is prevented from deteriorating. In addition, it is possible to prevent the evaporation of water vapor from the inside of the container to the outside and to prevent the internal volume from decreasing. For example, a plastic member 40 may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and the bottom portion 30 of the container body 10, and the gas barrier property of this portion may be improved. As such a material, PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorbing material such as a fatty acid salt may be mixed with these materials. It is done.

  The plastic member 40 (40a) may contain a material having light barrier properties such as ultraviolet rays. Further, when the plastic member 40 (40a) is composed of multiple layers, the plastic member 40 (40a) may include a layer made of a material having a light barrier property such as ultraviolet rays. In this case, the light barrier property of the composite container 10A can be improved and the content liquid can be prevented from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10a. For example, a plastic member 40a may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and the bottom portion 30 of the container body 10 to enhance the ultraviolet barrier property of this portion. 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 the foam cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the melt of a thermoplastic resin.

  Moreover, the plastic member 40 (40a) may include a material having a higher heat retaining property or a higher heat retaining property (a material having a lower thermal conductivity) than a plastic material constituting the container body 10 (preform 10a). In the case where the plastic member 40 (40a) is composed of multiple layers, the plastic member 40 (40a) is a material (heat conduction) having a higher heat retaining property or cold retaining property than the plastic material constituting the container body 10 (preform 10a). A layer made of a material having low properties). In this case, it is possible to make it difficult for the temperature of the content liquid to be transmitted to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. Thereby, the heat retaining property or cold retaining property of the composite container 10A is enhanced. For example, the plastic member 40 may be provided on the whole or a part of the body 20 in the container body 10 to enhance the heat retaining property or the cold retaining property of the body 20. Further, when the user grips the composite container 10A, it is prevented that the composite container 10A becomes difficult to hold due to being too hot or too cold. Examples of such materials include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. Moreover, you may use the foaming member with the foam cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the melt of a thermoplastic resin. It is preferable to mix hollow particles with a resin material containing these resins. The average particle diameter of the hollow particles is preferably 1 to 200 μm, and more preferably 5 to 80 μm. The “average particle size” means the volume average particle size and is measured by a known method using a particle size distribution / particle size distribution measuring device (for example, Nanotrack particle size distribution measuring device, manufactured by Nikkiso Co., Ltd.). can do. The hollow particles may be organic hollow particles composed of a resin or the like, or may be inorganic hollow particles composed of glass or the like. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include styrene resins such as cross-linked styrene-acrylic resins, (meth) acrylic resins such as acrylonitrile-acrylic resins, phenolic resins, fluorine resins, polyamide resins, and polyimides. Resin, polycarbonate resin, polyether resin and the like. Also, Ropeke HP-1055, Ropeke HP-91, Ropeke OP-84J, Ropeke Ultra, Ropeke SE, Ropeke ST (manufactured by Rohm and Haas), Nipol MH-5055 (manufactured by Nippon Zeon), SX8782 , And commercially available hollow particles such as SX866 (manufactured by JSR Corporation) can also be used. As content of a hollow particle, when the plastic member 40a consists of a single layer, it is preferable that it is 0.01-50 mass parts with respect to 100 mass parts of resin materials contained in the plastic member 40a. More preferably, it is -20 mass parts. When the plastic member 40a is composed of multiple layers, it is preferably 0.01 to 50 parts by mass, more preferably 1 to 20 parts by mass with respect to 100 parts by mass of the resin material included in the layer containing hollow particles. preferable.

  Further, the plastic member 40 (40a) may include a material that is less slippery than the plastic material constituting the container body 10 (preform 10a). Further, when the plastic member 40 (40a) is composed of multiple layers, the plastic member 40 (40a) includes a layer made of a material that is less slippery than the plastic material constituting the container body 10 (preform 10a) as the outermost layer. May be. In this case, the user can easily hold the composite container 10 </ b> A without changing the material of the container body 10. For example, a plastic member 40 may be provided on all or part of the body 20 of the container body 10 so that the body 20 can be easily held.

  The plastic member 40a may be colored in colors such as red, blue, yellow, green, brown, black, white, and may be transparent or opaque.

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

  As shown in FIG. 4A, the plastic member 40 a has a bottomed cylindrical shape as a whole, and may have a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. . In this case, since the bottom 42 of the plastic member 40a covers the bottom 30a of the preform 10a, various functions and characteristics can be imparted to the bottom 30 in addition to the trunk 20 of the composite container 10A. Examples of such a plastic member 40a include the above-described blow tube, sheet molded tube, and injection molded tube.

  Further, as shown in FIG. 4B, the plastic member 40a may have a circular tube shape (bottomless cylindrical shape) as a whole and may have a cylindrical body portion 41. In this case, as the plastic member 40a, for example, the above-described blow tube, extruded tube, inflation molded tube, sheet molded tube, or injection 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 edge part together. In this case, as shown in FIG. 4 (c), the plastic member 40a may be configured in a tubular shape (bottomless cylindrical shape) having a body portion 41, and as shown in FIG. 4 (d), The bottom 42 may be bonded to form a bottomed cylinder. In this case, as the plastic member 40a, for example, a blow tube, an extruded tube, an inflation molded tube, a sheet molded tube, or an injection molded tube can be used.

  In addition, the printing area | region 43a may be previously provided in the plastic members 40a.

  Next, a method for manufacturing the plastic member 40a will be described.

  In one embodiment, the plastic member 40a can be manufactured by molding a resin sheet containing a resin material. Examples of the molding method include deep-drawing molding, or a method of molding a resin sheet into a tube shape and fusing or bonding the end portions thereof. Moreover, the plastic member 40a composed of multiple layers can be obtained by molding a laminated resin sheet obtained by laminating two or more resin sheets via the above-described adhesive.

  A commercial item may be used for the said resin sheet, and it can manufacture it by a conventionally well-known method. In this invention, it is preferable to manufacture by extrusion molding, and it is preferable that extrusion molding is performed by the T-die method or the inflation method.

  For example, a resin sheet can be formed by extrusion molding according to the following method. After drying the above resin material, it is supplied to a melt extruder heated to a temperature not lower than the melting point of the thermoplastic resin (Tm) to Tm + 70 ° C., and the resin material is heated and melted. A resin sheet can be formed by extruding into a sheet form from a die and rapidly solidifying the extruded sheet-like object with a rotating cooling drum or the like. As the melt extruder, a single screw extruder, a twin screw extruder, a vent extruder, a tandem extruder, or the like can be used depending on the purpose.

The heating temperature is preferably 170 to 230 ° C., more preferably 180 to 220 ° C. in the inflation method, and preferably 180 to 300 ° C., more preferably 210 to 270 ° C. in the T-die method.
The resin material is, for example, 0.3 to 30 g / 10 minutes, preferably 0.3 to 8 g / 10 minutes, 0.3 to 6 g / 10 minutes in the inflation method, and preferably 0.3 to 0.3 in the T-die method. It has a melt flow rate (MFR) of 20 g / 10 min, more preferably 4 to 15 g / 10 min. The melt flow rate is a value measured by the method A under the conditions of a temperature of 190 ° C. and a load of 21.18 N in the method defined in JIS K7210-1995. If the MFR of the resin material is 0.3 g / 10 min or more, the extrusion load during the molding process can be reduced. Moreover, if MFR of a resin material is 30 g / 10min or less, the mechanical strength of the resin sheet which consists of this resin material can be raised.

  In one embodiment, the plastic member 40a can also be manufactured by extruding a heat-melted resin material into a tube shape. The multilayer plastic member 40a can be obtained by co-extrusion of two or more kinds of resin materials. Also, the plastic member 40a can be obtained by extruding the mixture in a mold and further blow-molding the mixture so as to expand the diameter along the inner surface of the mold.

  Further, one end of the tube obtained by extruding the resin material is closed by adhesion, welding or the like. The tube closed at one end is placed in a tube-shaped mold having an inner diameter larger than the outer diameter of the tube, and a blow device is placed at the other end of the tube. At this time, it is preferable that the blow device is in close contact with the tube so that air does not leak from between them. Next, the tube, the mold and the blow device are fed into the heating furnace in this arrangement and heated to 70 to 150 ° C. inside the heating furnace. As the heating furnace, a hot-air circulating heating furnace may be used in order to make the inside uniform. Or you may heat these by making a tube, a metal mold | die, and a blowing apparatus pass in the heated liquid. Next, the tube, the mold and the blow device are taken out of the heating furnace, and air is blown into the tube from the blow device, whereby the inner surface of the tube is pressurized and stretched. Thereby, a tube expand | swells and diameter-expands along the inner surface shape of a metal mold | die. Thereafter, the tube is cooled in cold water while air is blown from the blow device, and the tube is taken out of the mold. By cutting this into a desired size, a plastic member 40a having contractility is obtained.

  In one embodiment, the plastic member 40a can also be obtained by an injection molding method. Specifically, first, the resin material is heated and melted. Next, the heat-melted resin material is injected into the mold. The plastic member 40a can also be obtained by cooling it and taking it out of the mold.

  Next, printing performed on the surface of the plastic member 40a will be described. The plastic member 40 (40a) is subjected to printing such as design or printing, that is, a printing region 43 (43a) is provided, whereby a separate label or the like is provided to the container body 10 after blow molding. It is possible to display images and characters on the composite container 10 </ b> A without providing the above. For example, the plastic member 40 may be provided on all or part of the trunk 20 in the container body 10, and images or characters may be displayed on the trunk 20. This printing may be performed on the plastic member (shrinkable tube) 40a before being attached to the preform 10a, or may be performed in a state where the plastic member 40a is provided outside the preform 10a.

  The ink used for forming the printing region 43 (43a) can contain a brown, black, green, blue or red colorant as a colorant. The colorant may be a pigment or a dye, but is preferably a pigment from the viewpoint of light resistance. Among the colorants described above, light reflecting pigments such as titanium white, aluminum powder, mica powder, zinc sulfide, zinc white, calcium carbonate, kaolin, talc and other white pigments, light absorbing pigments, carbon black, Colored pigments such as ceramic black and bone black are preferred. By using such an ink containing a pigment, it is possible to reduce the visible light transmittance of the plastic member 40 after blow molding, and to prevent a change in the quality of the content liquid filled in the composite container 10A. can do. In addition, the content of the colorant in the ink is preferably 0.01 to 30% by mass, and more preferably 1 to 10% by mass.

  Further, the ink preferably contains a thermosetting resin or an ionizing radiation curable resin, and an ionizing radiation curable resin is more preferable from the viewpoint of high surface hardness and excellent productivity. A thermosetting resin and an ionizing radiation curable resin may be used in combination.

  As ionizing radiation curable resins, polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadienes that can be polymerized and cross-linked by irradiation with ionizing radiation such as ultraviolet rays and electron beams. Examples thereof include resins, polythiol polycircle resins, and polyhydric alcohols, and ultraviolet curable resins are preferred because they have high followability and are less likely to cause defects such as cracks by blow molding. As an ultraviolet curable resin, for example, polymethylol having two or more unsaturated bonds such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone having one unsaturated bond Propane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,6 -Hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, etc., or a reaction product of the above compound with (meth) acrylate or the like. In the present specification, “(meth) acrylate” refers to methacrylate and acrylate. Furthermore, it is preferable to use these resins in combination with a photopolymerization initiator, and examples thereof include acetophenones, benzophenones, and benzyls.

  Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation resin, silicon resin, Examples thereof include polysiloxane resin. Furthermore, it is preferable to use these resins in combination with a thermal polymerization initiator, a curing accelerator, a curing agent, and the like.

  The total content of the thermosetting resin and ionizing radiation curable resin in the ink is preferably 1 to 20% by mass, and more preferably 1 to 10% by mass.

  The printing region 43a can be formed by a printing method such as an ink jet method, a gravure printing method, an offset printing method, or a flexographic printing method, and is preferably formed by an ink jet method because a plate is unnecessary. For example, when the ink jet method is used, the printing region 43a can be formed by applying UV curable ink to the plastic member 40a, irradiating it with UV, and curing it.

  Prior to printing, the surface of the plastic member 40a is preferably subjected to surface treatment such as corona treatment, plasma treatment, or flame treatment.

  Next, a method for forming the printing region 43a by printing on the outside of the plastic member 40a attached to the preform 10a will be further described. For example, a predetermined design or pattern may be printed by spraying ink from a direction substantially perpendicular to the outer surface of the plastic member 40a using a known printer 80 (printing apparatus) of an ink jet system.

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

  FIG. 5 shows an example of a printer that performs printing on the surface of a plastic member 40a (composite preform 70) attached to the preform 10a. In FIG. 5, the printer 80 has a composite preform 70 mounted thereon, a head 81 that rotates (spins and revolves), and an ink spraying unit that sprays ink onto a plastic member 40 a mounted on the head 81. 82 and an ink curing unit 83 that cures the attached ink. In this case, the plastic member 40a of the composite preform 70 attached to the head 81 is sprayed with ink at the ink spraying portion 82 while rotating and revolving. After that, the composite preform 70 is raised in the head 81, and the ink is UV cured, for example, in the ink curing unit 83. Thereby, the printing area | region 43a is given to the outer side of the plastic members 40a.

  FIG. 6 shows another example of a printer that performs printing on a plastic member 40a (composite preform 70) attached to the preform 10a. In FIG. 6, the printer 80 includes a plurality of wheels 84 and 85 that convey the composite preform 70 and rotate (spin and rotate) the composite preform 70. The plurality of wheels 84 and 85 include an ink spraying wheel 84 that sprays ink and an ink curing wheel 85 that cures the adhered ink. In this case, the composite preform 70 is sequentially transported by the ink spraying wheels 84, and ink is sprayed at the ink spraying portion 86 of each ink spraying wheel 84. Thereafter, the ink is conveyed to the ink curing wheel 85, and the ink is UV cured, for example, in the ink curing wheel 85. Thereby, the printing area | region 43a is given to the outer side of the plastic members 40a.

  The printing may be repeated repeatedly a plurality of times. Thereby, even after the printing region 43a is extended after blow molding, printing such as design or printing can be clearly displayed.

  Moreover, it is preferable to previously form an anchor coat layer in a place where the printing region 43a on the surface of the plastic member 40a is provided. When the anchor coat layer is provided, the ink adhesion to the plastic member 40a is improved. This eliminates the need for pretreatment such as corona treatment. Furthermore, printing blur can be reduced by providing an anchor coat layer.

  The anchor coat layer can be formed using a conventionally known anchor coat agent. The anchor coat layer is formed, for example, by applying a coating liquid containing an anchor coat agent to the plastic member 40 (40a) using an ink jet method, and irradiating it with, for example, ionizing radiation and curing it. be able to. By forming the anchor coat layer by the inkjet method, the formation of the anchor coat layer and the formation of the print region 43a on the surface thereof can be performed in the same apparatus, and the number of processes can be reduced.

  Moreover, it is preferable to form a protective layer on the printing region 43a on the surface of the plastic member 40a. By forming a surface protective layer on the surface of the plastic member 40 (40a), it is possible to effectively prevent the occurrence of defects over time, such as printing applied to the plastic member 40 (40a), In addition, the durability of the composite container can be increased.

  The protective layer preferably comprises a thermosetting resin or an ionizing radiation curable resin, and an ionizing radiation curable resin is more preferable from the viewpoint of high surface hardness and excellent productivity. A thermosetting resin and an ionizing radiation curable resin may be used in combination. As the thermosetting resin and ionizing radiation curable resin, those described above can be used. The protective layer may be formed by, for example, applying a coating solution containing the resin to a printed part on the surface of the plastic member 40 (40a) using an ink jet method, and irradiating it with, for example, ionizing radiation to be cured. Can be formed. By forming the protective layer by the inkjet method, the formation of the anchor coat layer, the formation of the printing region 43a on the surface thereof, and the formation of the protective layer can be performed in the same apparatus, and the number of processes can be reduced. . In addition, a protective layer can also be performed after blow molding.

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

  First, a preform 10a made of a plastic material is prepared (see FIG. 5A). In this case, for example, the preform 10a may be manufactured by an injection molding method using an unillustrated injection molding machine. Moreover, you may use the preform generally used conventionally 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 in close contact with the outside of the preform 10a is manufactured (FIG. 5 ( b)). In this case, the plastic member 40 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member 40a is mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  In this case, a plastic member 40a having an inner diameter that is the same as or slightly smaller than the outer diameter of the preform 10a may be pressed into the preform 10a to be brought into close contact with the outer surface of the preform 10a, thereby forming the composite preform 70. . Alternatively, as will be described later, a heat-shrinkable plastic member 40a is provided on the outer surface of the preform 10a, and the plastic member 40a is thermally contracted by heating to 50 ° C. to 100 ° C. You may make it stick to.

  Next, printing is performed on the surface of the plastic member 40a using a known printer 80, thereby forming a printing region 43a (FIG. 7C). Note that the composite preform 70 may be manufactured using a plastic member 40a in which the printing region 43a is provided in advance.

  In this manner, a series of steps for producing the composite preform 70 is performed by previously bringing the plastic member 40a into close contact with the outside of the preform 10a, producing the composite preform 70, and further providing the printing region 43a (see FIG. 7 (a) to (c)) and a series of steps (FIGS. 7 (d) to (g)) for producing the composite container 10A by blow molding can be carried out at different places (factories, etc.). Become.

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 7D). At this time, the composite preform 70 is evenly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a 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. 7E).

  The composite container 10 </ b> A is molded using this blow molding die 50. In this case, the blow mold 50 includes a pair of body molds 50a and 50b and a bottom mold 50c which are divided from each other (see FIG. 7E). In FIG.7 (e), between a pair of trunk | drum metal mold | dies 50a and 50b is mutually open, and the bottom metal mold | die 50c has gone up. In this state, the composite preform 70 is inserted between the pair of body molds 50a and 50b.

  Next, as shown in FIG. 7 (f), 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. A blow mold 50 is formed. Next, air is press-fitted into the preform 10 a and biaxial stretch blow molding is performed on 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 mold 50, the preform 10a of the composite preform 70 and the plastic member 40a are expanded as a unit. Thereby, the preform 10a and the plastic member 40a are integrally formed into a shape corresponding to the inner surface of the blow mold 50.

  In this manner, 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. 7 (g), the pair of body molds 50 a and 50 b and the bottom mold 50 c are separated from each other, and the composite container 10 </ b> A is taken out from the blow molding mold 50.

Modified Example of Blow Molding Method Next, a modified example of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. The modification shown in FIGS. 8A to 8F has an effect that the plastic member (shrinkable tube) 40a contracts with respect to the preform 10a, and other configurations are as shown in FIGS. It is substantially the same as the form shown in (g). 8A to 8F, the same parts as those in FIGS. 7A to 7G are denoted by the same reference numerals, and detailed description thereof is omitted.

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

  Next, a plastic member (shrinkable tube) 40a in which a printing region 43a is provided in advance is provided outside the preform 10a (see FIG. 8B). In this case, the plastic member (shrinkable tube) 40 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 and a bottom 42 connected to the body 41. This plastic member (shrinkable tube) 40 is mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

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

  In this way, the plastic member (shrinkable tube) 40a is heated, so that the plastic member (shrinkable tube) 40a is thermally contracted and is in close contact with the outside of the preform 10a (see FIG. 8C). In the case where the plastic member (shrinkable tube) 40a itself has shrinkability, the plastic member (shrinkable) when the plastic member (shrinkable tube) 40a is provided outside the preform 10a (see FIG. 8B). Tube) 40a may be in close contact with the outside of the preform 10a.

  Subsequently, the preform 10a and the plastic member (shrinkable tube) 40a heated by the heating device 51 are sent to the blow mold 50 (see FIG. 8D).

  The preform 10a and the plastic member (shrinkable tube) 40a are molded using this blow molding die 50, and in the same manner as in FIGS. 7 (a) to (g) described above, A composite container 10A including a plastic member (shrinkable tube) 40 provided on the outer surface of the container body 10 is obtained (see FIGS. 8D to 8F).

  Next, with reference to FIGS. 9A to 9H, another modified example of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described. 9 (a) to 9 (h), the plastic member (shrinkable tube) 40a has a function of contracting with respect to the preform 10a, and the preform 10a and the plastic member (shrinkable tube) 40a have two functions. Heating is performed in stages, and other configurations are substantially the same as those shown in FIGS. 7 (a) to (g). 9A to 9H, the same portions as those in FIGS. 7A to 7G are denoted by the same reference numerals, and detailed description thereof is omitted.

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

  Next, a plastic member (shrinkable tube) 40a is provided outside the preform 10a (see FIG. 9B). In this case, the plastic member (shrinkable tube) 40 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 and a bottom 42 connected to the body 41. This plastic member (shrinkable tube) 40 is mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

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

  When the plastic member (shrinkable tube) 40a is heated, the plastic member (shrinkable tube) 40a is thermally shrunk and adheres to the outside of the preform 10a. Thereby, the composite preform 70 having the preform 10a and the plastic member (shrinkable tube) 40a in close contact with the outside of the preform 10a is obtained (see FIG. 9C).

  Next, printing is performed on the surface of the plastic member 40a using a known printer 80, thereby forming a printing region 43a (FIG. 9D). Note that the composite preform 70 may be manufactured using a plastic member 40a in which the printing region 43a is provided in advance.

  In this way, by using the first heating device 55 to preliminarily heat and adhere the plastic member (shrinkable tube) 40a to the outside of the preform 10a to produce the composite preform 70, the composite preform 70 can be A series of steps to be produced (FIGS. 9A to 9D) and a series of steps to produce the composite container 10A by blow molding (FIGS. 9E to 9H) are separated from each other (factory, etc.). Can be implemented.

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 9E). At this time, the composite preform 70 is evenly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member (shrinkable tube) 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. 7F).

  The composite preform 70 is molded using the blow mold 50, and is 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. 7 (a) to 7 (g) described above. A composite container 10 </ b> A having a contracted tube (shrinkable tube) 40 is obtained (see FIGS. 9 (e) to 9 (h)).

  As described above, according to the present embodiment, the preform 10a and the plastic member 40a of the composite preform 70 are integrated by performing blow molding on the composite preform 70 in the blow molding die 50. As a result, a composite container 10A including the container body 10 and the plastic member 40 is manufactured. Thereby, preform 10a (container main part 10) and plastic member 40a (plastic member 40) can be constituted from another member. 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 the composite container 10A is manufactured, a general blow molding apparatus can be used as it is, so that it is necessary to prepare a new molding equipment for manufacturing the composite container 10A. Absent.

  Further, according to the present embodiment, since the plastic member of the composite preform is printed on the surface thereof, the composite container in which the plastic member is expanded is also printed. This eliminates the need for a labeling process using a labeler after the container is tightly sealed, so that the manufacturing cost can be suppressed and the yield can be prevented from decreasing.

Modified Example Next, a modified example of the first embodiment of the present invention will be described with reference to FIGS. 10, 11 and 12A to 12G.

  The modification shown in FIGS. 10, 11 and 12 (a) to 12 (g) does not have a body portion and a bottom portion as the plastic member 40a, but uses a cylindrical plastic member 40a. .

  In the composite container 10 </ b> A shown in FIG. 10, the plastic member 40 extends from the shoulder 12 of the container body 10 to the lower part of the trunk 20, 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 trunk portion 20a of the preform 10a, and more specifically, the neck portion 13 of the container body 10 in the trunk portion 20a. The region excluding the portion 13a corresponding to the portion and the portion corresponding to the lower portion of the body portion 20a is covered.

  10, 11, and 12 (a) to 12 (g), the other configurations are substantially the same as those of the embodiment shown in FIGS. 1 to 9. In the modification shown in FIGS. 10, 11 and 12 (a) to 12 (g), the same parts as those in the embodiment shown in FIGS.

  In addition, 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 in the embodiment shown in FIGS. 10, 11, and 12 (a) to 12 (g), the plastic member 40 may have a function of contracting with respect to the preform 10 a.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. 13 to 22 are diagrams showing a second embodiment of the present invention. In FIG. 13 to FIG. 22, the same parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, an outline of a composite container produced by the blow molding method according to the present embodiment will be described with reference to FIGS. 13 and 14.

  A composite container 10A shown in FIGS. 13 and 14 is formed into a composite preform 70 (see FIG. 15) including a preform 10a, an inner label member 60a, and a plastic member 40a by using a blow molding die 50, as will be described later. On the other hand, by performing biaxial stretch blow molding, the preform 10a, the inner label member 60a, and the plastic member 40a of the composite preform 70 are integrally expanded.

  Such a composite container 10 </ b> A 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 main body 10. The plastic member 40 is provided.

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

  On the other hand, 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.

  Further, the plastic member 40 is provided with a printing region 43 printed on the surface thereof, and 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 thin state. The container body 10 is in close contact with the container body 10 so as not to easily move or rotate.

  It is conceivable that at least a part of the plastic member 40 is translucent or transparent. In this case, the inner label member 60 can be visually recognized 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 (for example, a window portion). In the present embodiment, a case where the entire plastic member 40 is transparent will be described as an example.

  Next, the inner label member 60 will be described. As will be described later, the inner label member 60 (60a) is provided so as to surround the outer side of the preform 10a, and is obtained by performing biaxial stretch blow molding integrally with the preform 10a and the plastic member 40a. Is.

  The inner label member 60 is attached to the outer surface of the container body 10 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. The inner label member 60 is thinly stretched on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 12, 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 so as to cover the shoulder portion 12, the trunk portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11 and the neck portion 13. Thereby, desired characters, images, and the like can be imparted to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container main body 10, and the composite container 10A can be decorated and information can be displayed.

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

  Further, the thickness of the inner label member 60 is not limited to this, but can be set to, for example, about 5 μm to 50 μm when attached to the container body 10.

  Next, the plastic member 40 will be described. As will be described later, the plastic member 40 (40a) is provided so as to surround the outer side of the inner label member 60a, and is obtained by performing biaxial stretch blow molding integrally with the preform 10a and the inner label member 60a. Is.

  The plastic member 40 is attached to the outer surface of the inner label member 60 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. A printing region 43 is provided on the surface of the plastic member 40 by printing. Thereby, the design of the image and characters of the inner label member 60 and the design of the image and characters of the plastic member 40 can be displayed in an overlapping manner. The plastic member 40 is thinly stretched on the outer surface of the inner label member 60 to cover the inner label member 60. As shown in FIG. 12, 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 addition, since the configurations of the container body 10 and the plastic member 40 are substantially the same as those in the first embodiment described above, detailed description thereof is omitted here.

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

  As shown in FIG. 15, the composite preform 70 includes a plastic material preform 10a, a bottomed cylindrical inner label member 60a provided in close contact with the outer side 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 close contact with the outer surface of the preform 10a, and is in close contact with the preform 10a without being easily moved or rotated. 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, in addition to the design and product name, character information such as the name of the content liquid, the manufacturer, and the name of the raw material may be described. In this case, it is possible to display images and characters on the composite container 10A without separately providing 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 trunk portion 20a of the preform 10a, and images and characters may be displayed on the trunk portion 20 of the container body 10 after molding. This eliminates the need for a labeling process using a labeler after the container is tightly sealed, so that the manufacturing cost can be suppressed and the yield can be prevented from decreasing.

  As such an inner label member 60a, films such as polyester resin, polyamide resin, polyaramid resin, polypropylene resin, polycarbonate resin, polyacetal resin, and fluorine resin 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.

  Further, various materials described below can be used as the inner label member 60a.

  For example, the inner label member 60a 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 property of the composite container 10A can be enhanced without using a multilayer preform or a preform containing a blend material as the preform 10a, and the content liquid can be prevented from being deteriorated by oxygen or water vapor. As such a material, PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorbing material such as a fatty acid salt may be mixed with these materials. It is done.

  The inner label member 60a may be made of a material having light barrier properties such as ultraviolet rays. In this case, without using a multilayer preform or a preform containing a blend material as the preform 10a, the light barrier property of the composite container 10A is improved, the invasion of oxygen into the container is prevented, and the content liquid is deteriorated. In addition, it is possible to prevent evaporation of water vapor from the inside of the container to the outside, and to prevent a decrease in the internal volume. 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, the inner label member 60a may be made of a material (a material having a low thermal conductivity) having a higher heat retaining property or a lower heat retaining property than a plastic material constituting the container body 10 (preform 10a). In this case, it is possible to make it difficult for the temperature of the content liquid to be transmitted to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. Thereby, the heat retaining property or cold retaining property of the composite container 10A is enhanced. Examples of such materials include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. Furthermore, it is preferable to comprise hollow particles. The average particle diameter of the hollow particles is preferably 1 to 200 μm, and more preferably 5 to 80 μm. The hollow particles may be organic hollow particles composed of a resin or the like, or may be inorganic hollow particles composed of glass or the like. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include the same ones as described above. Moreover, the said commercially available hollow particle can also be used. As content of a hollow particle, it is preferable that it is 0.01-50 mass parts with respect to 100 mass parts of resin contained in the inner side label member 60a, and it is more preferable that it is 1-20 mass parts.

  On the other hand, the plastic member 40a is provided with a printing region 43a by printing on the surface thereof, and is attached to the outer surface of the inner label member 60a without being bonded to the preform 10a. So that it does not move or rotate. The plastic member 40a is provided over the entire circumferential direction so as to surround the preform 10a, and has a substantially circular horizontal cross section.

  In this case, the inner label member 60a and the plastic member 40a are provided so as to cover the entire region of the body portion 20a excluding the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  The inner label member 60a and the plastic member 40a may be provided in the entire region or a partial region other than the mouth portion 11a. For example, the inner label member 60a and the plastic member 40a may be provided so as to cover the entire body portion 20a and the bottom portion 30a except for the mouth portion 11a. Furthermore, the inner label member 60a and the plastic member 40a are not limited to one, and a plurality of inner label members 60a and plastic members 40a may be provided. For example, the two inner label members 60a and the plastic member 40a may be provided at two locations on the outer side of the body portion 20a.

  Such a plastic member 40a may be one that does not have a contracting action on the preform 10a or may have a contracting action.

  In the latter case, any plastic member (shrinkable tube) 40a may be used as long as it has a function of shrinking the preform 10a. The plastic member (shrinkable tube) 40a is preferably a member that contracts (for example, heat shrinks) with respect to the preform 10a when an external action (for example, heat) is applied.

  In addition, since the configurations of the preform 10a and the plastic member 40a are substantially the same as those in the first embodiment described above, detailed description thereof is omitted here.

  Next, the shape of the plastic member 40a and / or the inner label member 60a will be described.

  As shown in FIG. 16 (a), the plastic member 40a (inner label member 60a) has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 (body 61) and a body 41 (body). 61) may be connected to the bottom 42 (bottom 62). In this case, since the bottom part 42 (bottom part 62) of the plastic member 40a (inner label member 60a) covers the bottom part 30a of the preform 10a, various functions are also applied to the bottom part 30 in addition to the trunk part 20 of the composite container 10A. And properties can be imparted.

  Further, as shown in FIG. 16B, the plastic member 40a (inner label member 60a) has a circular tube shape (bottomless cylindrical shape) as a whole, and the cylindrical body portion 41 (body portion 61) is formed. You may have. In this case, as the plastic member 40a (inner label member 60a), for example, an extruded tube can be used.

  Further, as shown in FIGS. 16C and 16D, the plastic member 40a (inner label member 60a) may be formed by forming a film into a cylindrical shape and bonding the end portions thereof. good. In this case, as shown in FIG. 16 (c), the plastic member 40a may be formed in a tube shape (bottomless cylindrical shape) having a body portion 41 (body portion 61). As shown in FIG. 3, the bottom portion 42 (bottom portion 62) may be bonded to form a bottomed cylindrical shape.

  In addition, the printing area | region 43a may be previously provided in the plastic members 40a (refer FIG. 16 (a)-(d)).

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

  First, a preform 10a made of a plastic material is prepared (see FIG. 17A).

  Next, an inner label member 60a is provided outside the preform 10a, and a plastic member 40a is provided outside the inner label member 60a. Thus, a composite preform 70 having the preform 10a, the inner label member 60a in close contact with the outer side of the preform 10a, and the plastic member 40a in close contact with the outer side of the inner label member 60a is produced (FIG. 17). (See (b)). In this case, the inner label member 60 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

  At this time, even if the inner label member 60a and the plastic member 40a having the same or slightly smaller inner diameter as the outer diameter of the preform 10a are pressed into the preform 10a, the inner label member 60a may be brought into close contact with the outer surface of the preform 10a good. Alternatively, the inner label member 60a and the plastic member 40a having heat shrinkability are provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a are thermally contracted by heating to 50 ° C. to 100 ° C. You may make it closely_contact | adhere to the outer surface of the preform 10a.

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

  Next, printing is performed on the surface of the plastic member 40a using a known printer 80, thereby forming a print region 43a (FIG. 17C). Note that the composite preform 70 may be manufactured using a plastic member 40a in which the printing region 43a is provided in advance.

  In this way, a series of steps for producing the composite preform 70 (FIG. 17 (FIG. 17 (FIG. 17)) is performed by previously bringing the plastic member 40 a into close contact with the outside of the preform 10 a and the inner label member 60 a to produce the composite preform 70. a) to (c)) and a series of steps (FIGS. 17 (d) to (g)) for producing the composite container 10A by blow molding can be performed at different places (factories, etc.).

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 17D).

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow mold 50. The composite container 10A is molded using this blow molding die 50, and is substantially the same as in the case of the first embodiment described above, and the container body 10 and the inner label member provided on the outer surface of the container body 10. 60 and the composite container 10A provided with the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 17E to 17G).

  In addition, the blow molding method (method for manufacturing 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 thereof is omitted here.

Modified Example of Blow Molding Method Next, a modified example of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. The modified examples shown in FIGS. 18A to 18F have an effect that the plastic member (shrinkable tube) 40a contracts with respect to the preform 10a, and other configurations are as shown in FIGS. It is substantially the same as the form shown in (g). 18A to 18F, the same parts as those in FIGS. 17A to 17G are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 18A).

  Next, an inner label member 60a is provided on the outer side of the preform 10a, and a plastic member (shrinkable tube) 40a on which the printing region 43a is provided is printed on the outer side of the inner label member 60 (FIG. 18). (See (b)). The inner label member 60a and the plastic member (shrinkable tube) 40a are mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a. This plastic member (shrinkable tube) 40a may be at least partially translucent or transparent.

  In this case, a plastic member (shrinkable tube) 40a is provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (shrinkable tube) 40a are integrally attached to the outside of the preform 10a. Also good. Alternatively, the inner label member 60a may be provided outside the preform 10a, and then a plastic member (shrinkable tube) 40a may be provided outside the inner label member 60a.

  Next, the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a are heated by the heating device 51 (see FIG. 18C). At this time, the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a are evenly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a in this heating step may be 90 ° C. to 130 ° C., for example.

  In this way, the plastic member (shrinkable tube) 40a is heated, so that the plastic member (shrinkable tube) 40a is thermally contracted and is in close contact with the outside of the preform 10a (see FIG. 18C). When the plastic member (shrinkable tube) 40a itself has shrinkability, the plastic member (see FIG. 18B) (see FIG. 18B) when the plastic member (shrinkable tube) 40a is provided outside the inner label member 60a. (Shrinkable tube) 40 a may be in close contact with the outer side of the inner label member 60.

  Subsequently, the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 18D).

  The preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a are molded using this blow molding die 50, and are substantially the same as in the case of FIGS. 17 (a) to (g) described above. A composite container 10A including a container body 10, an inner label member 60 provided on the outer surface of the container body 10, and a plastic member (shrinkable tube) 40 provided outside the inner label member 60 is obtained (FIG. 18 (d) to (f)).

  Next, with reference to FIGS. 19A to 19H, another modification of the blow molding method (a method for manufacturing the composite container 10A) according to the present embodiment will be described. 19 (a) to 19 (h) has an effect that the plastic member (shrinkable tube) 40a contracts with respect to the preform 10a, and the preform 10a and the plastic member (shrinkable tube) 40a have two functions. Heating is performed in stages, and other configurations are substantially the same as those shown in FIGS. 17 (a) to 17 (g). 19A to 19H, the same portions as those in FIGS. 17A to 17G are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 19A).

  Next, an inner label member 60a is provided outside the preform 10a, and a plastic member (shrinkable tube) 40a is provided outside the inner label member 60a (see FIG. 19B). The plastic member (shrinkable tube) 40a is mounted so as to cover the entire region of the body portion 20a except the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a. This plastic member (shrinkable tube) 40a may be at least partially translucent or transparent.

  In this case, a plastic member (shrinkable tube) 40a is provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (shrinkable tube) 40a are integrally attached to the outside of the preform 10a. Also good. Alternatively, the inner label member 60a may be provided outside the preform 10a, and then a plastic member (shrinkable tube) 40a may be provided outside the inner label member 60a.

  Next, the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a are heated by the first heating device 55 (see FIG. 19C). At this time, the heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a may be 50 ° C. to 100 ° C., for example.

  When the plastic member (shrinkable tube) 40a is heated, the plastic member (shrinkable tube) 40a is thermally shrunk and adheres to the outside of the preform 10a. As a result, a composite preform 70 having the preform 10a, the inner label member 60 in close contact with the outer side of the preform 10a, and the plastic member (shrinkable tube) 40a in close contact with the outer side of the inner label member 60a is obtained. (See FIG. 19C).

  Next, printing is performed on the surface of the plastic member 40a using a known printer 80, thereby forming a printing region 43a (FIG. 19D). Note that the composite preform 70 may be manufactured using a plastic member 40a in which the printing region 43a is provided in advance.

  Thus, by using the first heating device 55, the plastic member (shrinkable tube) 40a is heated and adhered to the outside of the preform 10a and the inner label member 60a in advance, and the composite preform 70 is produced. A series of steps for producing the composite preform 70 (FIGS. 19A to 19D) and a series of steps for producing the composite container 10A by blow molding (FIGS. 19E to 19H) are separated. It becomes possible to carry out at the place (factory etc.).

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 19E). At this time, the composite preform 70 is evenly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a in this heating step may be 90 ° C. to 130 ° C., for example.

  Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 19F).

  The composite preform 70 is molded using the blow mold 50, and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the above-described FIGS. 17 (a) to 17 (g). The composite container 10A including the inner label member 60 and the plastic member (shrinkable tube) 40a provided outside the inner label member 60 is obtained (see FIGS. 19F to 19H).

As described above, according to the present embodiment, the preform 10a, the inner label member 60a, and the plastic of the composite preform 70 are formed by performing blow molding on the composite preform 70 in the blow molding die 50. The product member 40a is expanded as a unit to produce a composite container 10A including the container body 10, the inner label member 60, and the plastic member 40. For this reason, the inner label member 60 can be provided in advance in the composite container 10A at the stage of manufacturing the composite container 10A using the preform 10a. Therefore, it is not necessary to provide a labeling step with a labeler after filling the composite container 10A with the content liquid and sealing it. Thereby, the manufacturing cost for manufacturing the final product can be suppressed.
Further, it is possible to prevent the yield from being lowered when the final product is manufactured due to a labeler defect or the like.

  Moreover, according to this Embodiment, the preform 10a (container main body 10) and the plastic member 40a (plastic member 40) can be comprised from another member. 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 the composite container 10A is manufactured, a general blow molding apparatus can be used as it is, so that it is necessary to prepare a new molding equipment for manufacturing the composite container 10A. Absent.

Modified Example Next, a modified example of the present invention will be described with reference to FIGS. 20, 21 and 22A to 22G.

  The modified example shown in FIGS. 20, 21 and 22 (a) to 22 (g) does not have a body portion and a bottom portion as the inner label member 60a and the plastic member 40a, but has a cylindrical inner label member 60a and The plastic member 40a is used.

  In the composite container 10 </ b> A shown in FIG. 20, the inner label member 60 and the plastic member 40 extend from the shoulder 12 of the container body 10 to the lower part of the trunk 20, but do not reach the bottom 30. In the composite preform 70 shown in FIG. 21, the inner label member 60a and the plastic member 40a are in close contact with each other so as to cover only the trunk portion 20a of the preform 10a. An area excluding a portion 13a corresponding to the neck portion 13 of the main body 10 and a portion corresponding to the lower portion of the trunk portion 20a is covered.

  20, 21, and 22 (a) to (g), the other configurations are substantially the same as those of the embodiment shown in FIGS. 13 to 19. In the modification shown in FIGS. 20, 21 and 22 (a) to 22 (g), the same parts as those in the embodiment shown in FIGS.

  In addition, 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 in the embodiment shown in FIGS. 20, 21, and 22 (a) to 22 (g), the plastic member 40 may have a function of contracting with respect to the preform 10 a.

Claims (17)

In the manufacturing method of the composite container,
Preparing a preform made of plastic material;
Providing a plastic member on the outside of the preform;
Providing a printing area on the surface of the plastic member;
Heating the preform and the plastic member and inserting it into a blow mold; and
And a step of expanding the preform and the plastic member integrally by performing blow molding on the preform and the plastic member in the blow molding die. Manufacturing method. In the manufacturing method of the composite container,
Preparing a preform made of plastic material;
A step of providing a plastic member having a printing area provided on the surface in advance on the outside of the preform;
Heating the preform and the plastic member and inserting it into a blow mold; and
A composite container comprising: a step of blow-molding the preform and the plastic member in the blow-molding mold so as to integrally expand the preform and the plastic member. Manufacturing method.   The method for manufacturing a composite container according to claim 1, wherein the printing region is formed by an inkjet method.   The said printing area | region is formed using the ink containing a thermosetting resin and / or ionizing radiation curable resin, The manufacture of the composite container as described in any one of Claims 1-3 characterized by the above-mentioned. Method.   The method further comprises the step of providing an anchor coat layer on a portion of the surface of the plastic member that is to be provided with the printing region before the step of providing the printing region on the surface of the plastic member. The manufacturing method of the composite container as described in any one of claim | item 1 -4.   The method for producing a composite container according to any one of claims 1 to 5, further comprising a step of providing a protective layer on the printing region.   The composite container obtained by the method as described in any one of Claims 1-6. In composite preform,
A preform made of plastic material,
A plastic member provided to surround the outside of the preform,
The composite preform, wherein the plastic member is in close contact with the outside of the preform, and a printing region is provided on the surface thereof.   The composite preform according to claim 8, wherein the printing region is formed by an inkjet method.   The composite preform according to claim 8 or 9, wherein the printing region is formed using an ink containing a thermosetting resin and / or an ionizing radiation curable resin.   The composite preform according to any one of claims 8 to 10, wherein the plastic member is further provided with an anchor coat layer between the printing region and the surface of the plastic member. .   The composite preform according to any one of claims 8 to 11, wherein the plastic member is further provided with a protective layer on the printing region. The composite container is mounted so as to surround the outside of the preform, and is heated together with the preform to produce a composite container having the preform and a plastic member closely attached to the outside of the preform. A plastic member,
A plastic member having a cylindrical body part covering at least the body part of the preform, and having a printing area on the surface thereof.   The plastic member according to claim 13, wherein the printing region is formed by an inkjet method.   The plastic member according to claim 13 or 14, wherein the printing region is formed using an ink comprising a thermosetting resin and / or an ionizing radiation curable resin.   The plastic member according to any one of claims 13 to 15, wherein the plastic member is further provided with an anchor coat layer between the printing region and the surface of the plastic member. .   The plastic member according to any one of claims 13 to 16, wherein the plastic member is further provided with a protective layer on the printing region.

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