JP7009353B2 - Manufacturing method of composite container, composite preform, composite container and plastic parts - Google Patents

Description

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

Recently, plastic bottles have become common as bottles for containing the contents of foods and drinks, and such plastic bottles contain the contents.

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

By the way, in the conventional biaxial stretch blow molding method, a container shape is formed by using a preform containing, for example, a single layer material such as PET or PP, a multilayer material or a blend material. However, in the conventional biaxial stretch blow molding method, it is general that the preform is simply molded into a container shape. Therefore, when the container is to have various functions and properties (barrier property, heat retention property, etc.), the means thereof is limited, for example, changing the material constituting the preform.

Japanese Unexamined Patent Publication No. 2009-241526

Further, conventionally, after filling a container with the content liquid, the container is sealed with a cap and a label is attached to the periphery of the container with a labeler. However, by installing a labeler and attaching a label, there are problems that the manufacturing cost increases and the yield decreases.

The present invention has been made in consideration of such a point, and is capable of imparting various functions and characteristics to a container and eliminating the step of labeling by a labeler. It is an object of the present invention to provide a manufacturing method, a composite preform, a composite container and a plastic member.

In the present invention, in the method for manufacturing a composite container, a step of preparing a preform made of a plastic material, a step of providing a plastic member on the outside of the preform, and a blow to the preform and the plastic member. It is a method for manufacturing a composite container, which comprises a step of integrally expanding the preform and the plastic member by performing molding, and printing is applied to the expanded plastic member. ..

The present invention is a method for manufacturing a composite container, characterized in that the preform and the plastic member are integrally inflated and then printed on the plastic member.

The present invention is a method for manufacturing a composite container, characterized in that a pre-printed plastic member is provided on the outside of the preform.

The present invention is characterized in that, after a plastic member is provided on the outside of the preform, printing is performed on the plastic member before blow molding is performed on the preform and the plastic member. It is a method of manufacturing a container.

The present invention is a method for manufacturing a composite container, characterized in that the preform and the plastic member are integrally inflated and then printed on the plastic member before being filled with the content liquid.

The present invention is a method for manufacturing a composite container, characterized in that the preform and the plastic member are integrally inflated, filled with a content liquid, and then printed on the plastic member.

The present invention is a method for manufacturing a composite container, characterized in that printing is applied to the plastic member by an inkjet method.

The present invention is a method for manufacturing a composite container, characterized in that the plastic member is an outer shrinking member having an action of shrinking with respect to the preform.

The present invention is a method for manufacturing a composite container, characterized in that the outer shrinking member shrinks with respect to the preform when heat is applied.

The present invention further comprises a step of providing an inner label member so as to surround the outer side of the preform, and the plastic member is provided on the outer side of the inner label member, which is a method for manufacturing a composite container. ..

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

The present invention comprises a preform made of a plastic material and a plastic member provided so as to surround the outside of the preform in a printed composite preform, wherein the plastic member is the preform. It is a composite preform that is in close contact with the outside of the plastic member and is characterized in that the plastic member is printed.

The present invention is a composite preform characterized in that the plastic member is printed by an inkjet method.

The present invention is a composite preform characterized in that the plastic member is an outer shrinking member having an action of shrinking with respect to the preform.

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

The present invention is further provided with an inner label member provided in close contact with the outside of the preform, and the plastic member is provided in close contact with the outside of the inner label member. It is a composite preform to be used.

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

The present invention comprises a container body made of a plastic material and a plastic member provided in close contact with the outside of the container body in a printed composite container, and the container body and the plastic member are provided with the container body and the plastic member. It is a composite container that is integrally expanded by blow molding and is printed on the plastic member.

The present invention is a composite container characterized in that the plastic member is printed by an inkjet method.

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

The present invention is a composite container characterized in that the outer shrinking member shrinks when heat is applied.

The present invention is further provided with an inner label member provided in close contact so as to surround the outside of the container body, and the plastic member is provided in close contact with the outside of the inner label member. It is a composite container.

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

The present invention is a composite preform having the preform and a plastic member in close contact with the outside of the preform by being mounted so as to surround the outside of the preform and being heated integrally with the preform. It is a plastic member for producing the above, and is characterized by having at least a tubular body portion covering the body portion of the preform and being printed.

According to the present invention, since the plastic member is printed, it is not necessary to provide a step of attaching a label by a labeler after sealing the container.

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

First Embodiment Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. 1 to 11 are views showing a first embodiment of the present invention.

First, with reference to FIGS. 1 and 2, the outline of the composite container produced by the method for manufacturing a composite container (blow molding method) according to the present embodiment will be described. In the present specification, "upper" and "lower" mean upper and lower parts of the composite container 10A in an upright state (FIG. 1), respectively.

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

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

Of 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 body portion 20 provided below the shoulder portion 12, and a body. It is provided with a bottom portion 30 provided below the portion 20.

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

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

Of these, the mouth portion 11 has a screw portion 14 screwed to a cap (not shown) and a flange portion 17 provided below the screw portion 14. The shape of the mouth 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. Further, the shoulder portion 12 is located between the neck portion 13 and the body portion 20, and has a shape in which the diameter gradually increases from the neck portion 13 side to the body portion 20 side.

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

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

The thickness of the container body 10 in the body portion 20 is not limited to this, but can be reduced to, for example, about 50 μm to 250 μm. Further, the weight of the container body 10 is not limited to this, but can be 10 g to 20 g. By reducing the wall thickness of the container body 10 in this way, the weight of the container body 10 can be reduced.

Such a container body 10 can be manufactured by biaxially stretch-blow molding a preform 10a (described later) manufactured by injection molding a synthetic resin material. As the material of the preform 10a, that is, the container body 10, a thermoplastic resin, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate) can be used. preferable. The container body 10 may be colored in a color such as red, blue, yellow, green, brown, black, or white, but is preferably colorless and transparent in consideration of ease of recycling. Further, the above-mentioned various resins may be blended and used. Further, a thin-film 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.

Further, the container body 10 can also be formed as a multi-layer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer is provided with 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). As the resin (intermediate layer) to have, a preform 10a composed of three or more layers may be extruded and then blow-molded to form a multi-layer bottle having gas barrier properties and light-shielding properties. As the intermediate layer, a resin blended with the above-mentioned various resins may be used.

Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foamed preform having a foamed cell diameter of 0.5 to 100 μm is formed, and this foamed preform is blow molded. Thereby, the container main body 10 may be manufactured. Since such a container body 10 has a built-in foam cell, it is possible to enhance the light-shielding property of the entire container body 10.

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

Next, the plastic member 40 will be described. The plastic member 40 (40a) is provided so as to surround the outside of the preform 10a as described later, and is obtained by being brought into close contact with the outside of the preform 10a and then biaxially stretched and blow-molded together with the preform 10a. It is a thing.

The plastic member 40 is attached to the outer surface of the container body 10 without being adhered, and is in close contact with the container body 10 so as not to move or rotate. The plastic member 40 is thinly stretched on the outer surface of the container body 10 to cover the container body 10. Further, as shown in FIG. 2, the plastic member 40 is provided over the entire circumferential direction so as to surround the container main 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 body portion 20, and the bottom portion 30 of the container body 10, excluding the mouth portion 11 and the neck portion 13. Thereby, desired functions and characteristics can be imparted to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10.

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

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

Such a plastic member 40 may have no shrinking action on the preform 10a, or may have a shrinking action.

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

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

The printing (printing area 43) may be performed on the inside of the plastic member 40. In this case, it is possible to prevent a problem that the print is peeled off due to scratches or wear applied from the outside.

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

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

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

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

Of 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 11a corresponds to the mouth portion 11 of the container body 10 described above, and has substantially the same shape as the mouth portion 11.
Further, the body portion 20a corresponds to the neck portion 13, the shoulder portion 12 and the body portion 20 of the container body 10 described above, and has a substantially cylindrical shape. The bottom portion 30a corresponds to the bottom portion 30 of the container body 10 described above, and has a substantially hemispherical shape.

The plastic member 40a is attached to the outer surface of the preform 10a without being adhered to the preform 10a so that it does not move or rotate, or is in close contact with the preform 10a so as not to move or rotate. .. The plastic member 40a is provided over the entire circumferential direction so as to surround the preform 10a, and has a circular horizontal cross section.

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

The plastic member 40a may be provided in the entire area or a part of the area other than the mouth portion 11a. For example, the plastic member 40a may be provided so as to cover the entire neck portion 13a, the body portion 20a, and the bottom portion 30a except for the mouth portion 11a. Further, the number of the 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 on the outer side of the body portion 20a, respectively.

Such a plastic member 40a may have no shrinking action on the preform 10a, or may have a shrinking action.

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

On the other hand, when the plastic member (outer shrinking member) 40a has an action of contracting, the plastic member (outer shrinking member) 40a is attached to the preform 10a, for example, when an external action (for example, heat) is applied. On the other hand, those that shrink (for example, heat shrink) may be used. Alternatively, the plastic member (outer contractile member) 40 may itself have shrinkage or elasticity and can be contracted without applying an external action.

Examples of the plastic member 40a include polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS tree, polyvinyl chloride, polyvinylidene chloride, and polyvinyl acetate. Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, methyl polymethacrylate, polyacrylic acid, methyl polyacrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, Ethylenepropylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluororubber, nylon 6, nylon 6,6, nylon MXD6, aromatic polyamide, polycarbonate, ethylene polyterephthalate, butylene polyterephthalate, ethylene polynaphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyetherketone, polyetheretherketone, unsaturated polyester, alkyd resin, polyimide, polysulfone, polyphenylene sulfide, polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide , Polyvinyl oxide, polyacetal, epoxy resin and the like. Of these, it is preferable to use a thermoplastic inelastic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). Further, various additives other than the main component resin may be added to the material of the plastic member 40a as long as the characteristics are not impaired. Additives include, for example, plasticizers, UV stabilizers, anticoloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, thread friction reducing agents, slip agents, mold release agents, anti-inflammatory agents. Excipients, ion exchangers, coloring pigments and the like can be added. Further, they may be blended materials, have a multi-layer structure, or have a partial multi-layer structure. Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foaming member having a foam cell diameter of 0.5 to 100 μm is used, and this foam preform is formed. , The light blocking effect can be enhanced.

Further, the plastic member 40a may be made of the same material as the container body 10 (preform 10a). In this case, the plastic member 40 can be placed mainly on the portion of the composite container 10A where the strength is desired to be increased, and the strength of the portion can be selectively increased. For example, a plastic member 40 may be provided around the shoulder portion 12 and the bottom portion 30 of the container body 10 to increase the strength of this portion. Examples of such a material include thermoplastic resins, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate).

Further, the plastic member 40a may be made of a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. In this case, it is possible to improve the gas barrier property of the composite container 10A and prevent the content liquid from being deteriorated by oxygen or water vapor without using a multilayer preform, a preform containing a blend material, or the like as the preform 10a. For example, the plastic member 40 may be provided in the entire area of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container main body 10 to enhance the gas barrier property of this portion. Such materials include PE (polyethylene), PP (polypropylene), MXD-6 (nylon), PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer), or oxygen such as fatty acid salts in these materials. It is also possible to mix an absorbent material.

Further, the plastic member 40a may be made of a material having a light ray barrier property such as ultraviolet rays. In this case, it is possible to enhance the light barrier property of the composite container 10A and prevent the content liquid 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, the plastic member 40a may be provided in the entire area of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container main body 10 to enhance the ultraviolet barrier property of this portion. As such a material, a blend material or a material in which a light-shielding resin is added to PET, PE, or PP can be considered. Further, a foaming member having a foam cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, may be used.

Further, the plastic member 40a may be made of a material (material having low thermal conductivity) having higher heat retention or cold retention than the 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. As a result, the heat-retaining property or the cold-retaining property of the composite container 10A is enhanced. For example, a plastic member 40 may be provided on all or part of the body 20 of the container body 10 to improve the heat retention or cold retention of the body 20. Further, when the user grips the composite container 10A, it is prevented from becoming difficult to hold the composite container 10A due to being too hot or too cold. As such a material, foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin and the like can be considered. Further, a foaming member having a foam cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, may be used.

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

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

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

As shown in FIGS. 3 and 4A, the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. May be. In this case, since the bottom portion 42 of the plastic member 40a covers the bottom portion 30a of the preform 10a, various functions and characteristics such as barrier properties are imparted to the bottom portion 30 in addition to the body portion 20 of the composite container 10A. Can be done. Examples of such a plastic member 40a include the blow tube and the sheet forming tube described above.

Further, as shown in FIGS. 11 (described later) and 4 (b), the plastic member 40a has a circular tube shape (bottomless cylindrical shape) as a whole, and has a cylindrical body portion 41. good.
In this case, as the plastic member 40a, for example, the blow tube, the extrusion tube, the inflation molding tube, and the sheet molding tube described above can be used.

Further, as shown in FIGS. 4 (c) and 4 (d), the plastic member 40a may be manufactured by forming a film into a cylindrical shape and laminating its ends. In this case, as shown in FIG. 4 (c), the plastic member 40a may be configured in a tube shape (bottomless cylindrical shape) having a body portion 41, and as shown in FIG. 4 (d). It may be configured into a bottomed cylinder shape by sticking the bottom portions 42 together.

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

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

Next, by providing the 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 produced (FIG. 5 (FIG. 5). b) See). In this case, the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41.

At this time, the plastic member 40a having the same or slightly smaller inner diameter as the outer diameter of the preform 10a may be pushed into the preform 10a so as to be brought into close contact with the outer surface of the preform 10a. 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 heat-shrinked by heating to 50 ° C to 100 ° C to cause the outer surface of the preform 10a. It may be in close contact with.

In this way, a series of steps for producing the composite preform 70 by bringing the plastic member 40a into close contact with the outside of the preform 10a in advance to prepare the composite preform 70 (FIGS. 5A to 5B). )) And a series of steps (FIGS. 5 (c) to (g)) for producing the composite container 10A by blow molding can be carried out at different places (factory or the like).

Next, the composite preform 70 is heated by the heating device 51 (see FIG. 5 (c)). At this time, the composite preform 70 is uniformly 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. 5D).

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

Next, as shown in FIG. 5 (e), after the bottom mold 50c is lowered, the pair of body molds 50a and 50b are closed, and the pair of body molds 50a and 50b and the bottom mold 50c are sealed. The blow-molded mold 50 is configured. Next, air is press-fitted into the preform 10a, and biaxial stretch blow molding is performed on the composite preform 70.

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

In this way, a composite container 10A including the container body 10 and the plastic member 40 provided on the outer surface of the container body 10 can be obtained.

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

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

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

FIG. 6 shows an example of a printer that prints on a composite container. In FIG. 6, the printer 80 sprays ink of each color on a head 81 on which the composite container 10A is mounted and rotates (rotates and revolves) the composite container 10A, and a composite container 10A mounted on the head 81. It has a portion 82 and an ink curing portion 83 that cures the ink adhering to the composite container 10A. In this case, the composite container 10A mounted on the head 81 is sprayed with ink of each color on the ink spraying portion 82 while rotating and revolving. After that, the composite container 10A rises in the head 81, and the ink is, for example, UV-cured in the ink curing portion 83. As a result, printing is applied to the outside of the plastic member 40.

FIG. 7 shows another example of a printer that prints on a composite container. In FIG. 7, the printer 80 has a plurality of wheels 84, 85 that convey the composite container 10A and rotate (rotate and revolve) the composite container 10A. The plurality of wheels 84, 85 include an ink spraying wheel 84 for spraying ink of each color, and an ink curing wheel 85 for curing the ink adhering to the composite container 10A. In this case, the composite container 10A is sequentially conveyed by each ink spraying wheel 84, and ink of each color is sprayed on the ink spraying portion 86 of each ink spraying wheel 84. After that, the composite container 10A is conveyed to the ink curing wheel 85, and the ink is UV-cured, for example, in the ink curing wheel 85. As a result, printing is applied to the outside of the plastic member 40.

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

In the above, the case where printing is applied to the outside of the plastic member 40 after the preform 10a and the plastic member 40a are integrally expanded has been described as an example, but the present invention is not limited to this. For example, the composite preform 70 (FIG. 3) may be manufactured by providing a pre-printed plastic member 40a on the outside or the inside of the preform 10a. After that, the composite preform 70 may be blow-molded so that the print area 43a is stretched together with the plastic member 40a to form the print area 43.

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

Alternatively, an unprinted plastic member 40a may be provided on the outside of the preform 10a first, and printing may be performed on the outside of the plastic member 40a before blow molding is performed. After that, the composite preform 70 may be blow-molded so that the print area 43a is stretched together with the plastic member 40a to form the print area 43.

Modification Example of Manufacturing Method of Composite Container Next, a modification of the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment will be described with reference to FIGS. 8 (a) to 8 (g). In the modification shown in FIGS. 8A to 8G, the plastic member (outer shrinkage member) 40a has an action of shrinking with respect to the preform 10a, and the other configurations are shown in FIG. 5A. It is substantially the same as the form shown in (g). In FIGS. 8 (a) to 8 (g), the same parts as those in FIGS. 5 (a) to 5 (g) are designated by the same reference numerals, and detailed description thereof will be omitted.

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

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

Next, the preform 10a and the plastic member (outer shrinking member) 40a are heated by the heating device 51 (see FIG. 8C). At this time, the preform 10a and the plastic member (outer shrinking member) 40a are uniformly 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 (outer shrinking member) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

When the plastic member (outer shrinking member) 40a is heated in this way, the plastic member (outer shrinking member) 40a is thermally shrunk and comes into close contact with the outside of the preform 10a (see FIG. 8C). .. When the plastic member (outer shrinking member) 40a itself has shrinkage, the plastic member is provided at the time when the plastic member (outer shrinking member) 40a is provided on the outside of the preform 10a (see FIG. 8B). (Outer shrinking member) 40a may be in close contact with the outside of the preform 10a.

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

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

Next, other modifications of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to FIGS. 9 (a) to 9 (h). In the modified examples shown in FIGS. 9A to 9H, the plastic member (outer shrinking member) 40a has an action of contracting with respect to the preform 10a, and the preform 10a and the plastic member (outer shrinking member) 40a Is heated in two stages, and the other configurations are substantially the same as the forms shown in FIGS. 5 (a) to 5 (g). In FIGS. 9 (a) to 9 (h), the same parts as those in FIGS. 5 (a) to 5 (g) are designated by the same reference numerals, and detailed description thereof will be omitted.

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

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

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

When the plastic member (outer shrinking member) 40a is heated, the plastic member (outer shrinking member) 40a is thermally shrunk and comes into close contact with the outside of the preform 10a. As a result, a composite preform 70 having a preform 10a and a plastic member (outer shrinking member) 40a in close contact with the outside of the preform 10a can be obtained (see FIG. 9C).

In this way, the composite preform 70 is produced by heating and adhering the plastic member (outer shrinkage member) 40a to the outside of the preform 10a in advance using the first heating device 55 to produce the composite preform 70. A series of steps (FIGS. 9 (a) to (c)) for producing the composite container 10A and a series of steps (FIGS. 9 (d) to (h)) for producing the composite container 10A by blow molding are performed at different locations (factory, etc.). ) Will be possible.

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

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

The composite preform 70 is molded by using the blow molding die 50, and is provided on the container main body 10 and the outer surface of the container main body 10 in substantially the same manner as in the cases of FIGS. 5 (a) to 5 (g) described above. A composite container 10A provided with the plastic member (outer shrink member) 40 is obtained (see FIGS. 9 (e) to 9 (g)). After that, the printed area 43 is formed by printing on the outside of the expanded plastic member 40 using the printer 80 (FIG. 9 (h)).

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

As described above, according to the present embodiment, the preform 10a of the composite preform 70 and the plastic member 40a are integrally formed by performing blow molding on the composite preform 70 in the blow molding mold 50. To prepare a composite container 10A having a container body 10 and a plastic member 40. As a result, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be made of separate members. Therefore, various functions and characteristics can be freely imparted to the composite container 10A by appropriately selecting the type and shape of the plastic member 40.

Further, according to the present embodiment, when the composite container 10A is manufactured, a general blow molding apparatus can be used as it is, so that it becomes necessary to prepare a new molding facility for manufacturing the composite container 10A. do not have. Further, since the plastic member 40a is provided on the outside of the preform 10a, it is not necessary to prepare a new molding facility for molding the preform 10a.

Further, according to the present embodiment, since the plastic member 40 is printed, the printing area 43 is provided in advance in the composite container 10A at the stage of manufacturing the composite container 10A using the preform 10a. Can be kept. Therefore, it is not necessary to provide a step of filling the composite container 10A with the content liquid, sealing the container, and then attaching a label by a labeler. As a result, the manufacturing cost for manufacturing the final product can be suppressed. In addition, it is possible to prevent the yield from being lowered when the final product is manufactured due to a defect of the labeler or the like.

Further, according to the present embodiment, 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. On the other hand, as a comparative example, when printing is directly applied to the container body 10, it may be difficult to recycle the container body 10.

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

The modified examples shown in FIGS. 10 and 11 do not have a body and a bottom as the plastic member 40a, but use a cylindrical plastic member 40a.

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

In FIGS. 10 and 11, other configurations are substantially the same as the embodiments shown in FIGS. 1 to 9. In the modified examples shown in FIGS. 10 and 11, the same parts as those of the embodiments shown in FIGS. 1 to 9 are designated by the same reference numerals, and detailed description thereof will be omitted. Further, since the configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiments shown in FIGS. 1 to 9, detailed description thereof will be omitted. Further, in FIGS. 10 and 11, those having a function of shrinking the plastic member 40 with respect to the preform 10a may be used.

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

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

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

Such a composite container 10A is provided in close contact with a container body 10 made of a plastic material located inside, an inner label member 60 provided in close contact with the outside of the container body 10, and an inner label member 60 provided in close contact with the outside of the inner label member 60. It is provided with a plastic member 40.

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

It is considered that at least a part of the plastic member 40 is translucent or transparent, and 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 translucent or transparent as a whole, or may have an opaque portion and a translucent or transparent portion (for example, a window portion).

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

The inner label member 60 is attached to the outer surface of the container body 10 without being adhered, 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. 13, the inner label member 60 is provided over the entire circumferential direction so as to surround the container main 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 body portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11 and the neck portion 13. As a result, desired characters, images, and the like can be added to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10, and the composite container 10A can be decorated or displayed with information.

The inner label member 60 may be provided in the entire area or a part of the container body 10 other than the mouth portion 11. For example, the inner label member 60 may be provided so as to cover the entire neck portion 13, shoulder portion 12, body portion 20, and bottom portion 30 of the container body 10 except for the mouth portion 11. Further, the number of inner label members 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 area as the plastic member 40, or may be provided in a narrower area than the plastic member 40. In the latter case, it is preferred that the inner label member 60 is completely covered by the plastic member 40.

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

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

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

In addition, since the configurations of the container body 10 and the plastic member 40 are substantially the same as those of the first embodiment described above, detailed description thereof will be omitted here.

Next, with reference to FIG. 14, the configuration of the composite preform according to the present embodiment will be described.

As shown in FIG. 14, the composite preform 70 includes a preform 10a made of a plastic material, a bottomed cylindrical inner label member 60a provided in close contact with the outer side of the preform 10a, and an inner label member 60a. It is provided with 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 so that it does not easily move or rotate with respect to the preform 10a, or is in close contact with the preform 10a to the extent that it does not fall due to its own weight. The inner label member 60a is provided over the entire circumferential direction so as to surround the preform 10a, and has a substantially circular horizontal cross section.

The inner label member 60a may be pre-designed or printed. For example, in addition to the design, product name, and the like, 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 attaching a label or the like to the container body 10 after blow molding. For example, an inner label member 60a may be provided on all or a part of the body portion 20a of the preform 10a so that an image or characters can be displayed on the body portion 20 of the container body 10 after molding. This eliminates the need for a step of attaching a label using a labeler after sealing the container, so that the manufacturing cost can be suppressed and the yield can be prevented from being lowered.

As such an inner label member 60a, a film such as a polyester resin, a polyamide resin, a polyaramid resin, a polypropylene resin, a polycarbonate resin, a polyacetal resin, or a 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.

On the other hand, the plastic member 40a is attached to the outer surface of the inner label member 60a without being adhered to the preform 10a so as not to move or rotate, or to adhere to the preform 10a to the extent that it does not fall due to its own weight. Has been done. Further, a printed printing area 43a may be provided on the outside or the inside of the plastic member 40a.

The inner label member 60a and the plastic member 40a may be provided in the entire area or a part of the area 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. Further, the inner label member 60a and the plastic member 40a are not limited to one each, and a plurality of them may be provided. For example, two inner label members 60a and a plastic member 40a may be provided at two locations on the outer side of the body portion 20a, respectively.

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

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

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

Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member 40a is provided on the outer side of the inner label member 60a. As a result, a composite preform 70 having a preform 10a, an inner label member 60a adhered to the outside of the preform 10a, and a plastic member 40a adhered to the outside of the inner label member 60a is produced (FIG. 15). (B)). In this case, the inner label member 60a has a bottomed cylindrical shape as a whole, and has 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 pushed against the preform 10a, they are brought into close contact with the outer surface of the preform 10a. good. Alternatively, a heat-shrinkable inner label member 60a and a plastic member 40a are provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a are heat-shrinked by heating to 50 ° C to 100 ° C. It may be in close contact with the outer surface of the preform 10a.

Further, 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 mounted on the outside of the preform 10a. Alternatively, the inner label member 60a may be provided on the outer side of the preform 10a, and then the plastic member 40a may be provided on the outer side of the inner label member 60a.

In this way, a series of steps for producing the composite preform 70 by bringing the plastic member 40a into close contact with the outside of the preform 10a and the inner label member 60a in advance to prepare the composite preform 70 (FIG. 15 (FIG. 15). It becomes possible to carry out a series of steps (FIGS. 15 (d) to (g)) for producing the composite container 10A by blow molding at different places (factory or the like).

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

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

In addition, since the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment is substantially the same as that for the first embodiment described above, detailed description thereof will be omitted here.

In FIGS. 15 (a) to 15 (g), the preform 10a, the inner label member 60a, and the plastic member 40a are integrally expanded and then printed on the outside of the plastic member 40, but this is limited to this. It is not something that can be done. A pre-printed plastic member 40a may be provided on the outside of the inner label member 60a, or a plastic member 40a may be provided on the outside of the inner label member 60a and then printed on the outside of the plastic member 40a. May be given.

Modification Examples of the Blow Molding Method FIGS. 16 (a) to 16 (g) and FIGS. 17 (a) to 17 (h) are diagrams showing modifications of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment, respectively. Is. In FIGS. 16 (a) to 16 (g) and FIGS. 17 (a) to 17 (h), the same parts as those in FIGS. 1 to 15 are designated by the same reference numerals, and detailed description thereof will be omitted.

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

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

Also in FIGS. 16 (a) to 16 (g) and FIGS. 17 (a) to 17 (h), the preform 10a, the inner label member 60a, and the plastic member 40a are integrally expanded, and then the outer side of the plastic member 40 is expanded. Is printed on, but it is not limited to this. A pre-printed plastic member 40a may be provided on the outside of the inner label member 60a, or a plastic member 40a may be provided on the outside of the inner label member 60a and then printed on the outside of the plastic member 40a. May be given.

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

The modified examples shown in FIGS. 18 and 19 do not have a body and a bottom as the inner label member 60a and the plastic member 40a, but use the cylindrical inner label member 60a and the plastic member 40a. .. Other configurations are substantially the same as the embodiments shown in FIGS. 12 to 17. In the modified examples shown in FIGS. 18 and 19, the same parts as those of the embodiments shown in FIGS. 12 to 17 are designated by the same reference numerals, and detailed description thereof will be omitted. Further, since the method for manufacturing the composite container 10A and the method for manufacturing the composite preform 70 are substantially the same as those of the embodiments shown in FIGS. 12 to 17, detailed description thereof will be omitted.

10 Container body 10A Composite container 10a Preform 11, 11a Mouth 12 Shoulder 13 Neck 14 Thread 17 Flange 20, 20a Body 30, 30a Bottom 31 Recess 32 Grounding 40, 40a Plastic member 41 Body 42 Bottom 50 Blow molding mold 60, 60a Inner label member 70 Composite preform

Claims (9)

In the method of manufacturing a composite container
The process of preparing a preform made of colorless and transparent plastic material,
A plastic member made of a heat-shrinkable material is loosely inserted into the preform and then heat-shrinked so that the preform has no joint in the circumferential direction in advance on the outside of the body and at least a part of the bottom. The process of mounting a tubular plastic member without gluing it,
By performing blow molding on the preform and the plastic member, the preform and the plastic member are integrally inflated, so that the container body and the outer surface of the container body are peeled off without being adhered to each other. The process of obtaining a composite container having a plastic member provided in close contact with the removable part, and
A step of inflating the preform and the plastic member as a unit and then printing only on the outer surface of the plastic member is provided.
The printed plastic member of the composite container is peeled off from the container body, and the container body can be recycled.
A method for manufacturing a composite container, characterized in that the plastic member is provided with a cutting line for peeling the plastic member. The method for manufacturing a composite container according to claim 1, wherein after the preform and the plastic member are integrally inflated, printing is performed only on the outer surface of the plastic member before filling with the content liquid. .. The method for manufacturing a composite container according to claim 1, wherein the preform and the plastic member are integrally inflated, filled with a content liquid, and then printed only on the outer surface of the plastic member. The method for manufacturing a composite container according to any one of claims 1 to 3, wherein printing is applied to the plastic member by an inkjet method. A step of providing an inner label member so as to surround the outer side of the preform is further provided.
The method for manufacturing a composite container according to any one of claims 1 to 4, wherein the plastic member is provided on the outside of the inner label member. The method for manufacturing a composite container according to any one of claims 1 to 5, wherein the ink used for printing is a UV curable ink or an EB curable ink. In a printed composite container
A container body made of colorless and transparent plastic material,
It is formed in a cylindrical shape with no joints in the circumferential direction, and is heat-shrinkable and is provided in close contact with each other so that it can be peeled off and removed without being adhered to the outside of the body of the container body and the outside of at least a part of the bottom. Equipped with plastic parts and
The container body and the plastic member are integrally expanded by blow molding.
Printing is applied only to the outer surface of the plastic member.
The printed plastic member is peeled off from the container body, and the container body can be recycled.
The plastic member is provided with a cutting line for peeling the plastic member.
A composite container further comprising an inner label member provided in close contact with the outside of the container body, and the plastic member is provided in close contact with the outside of the inner label member . The composite container according to claim 7, wherein the plastic member is printed by an inkjet method. The composite container according to claim 7 or 8 , wherein the ink used for printing is a UV curable ink or an EB curable ink.

Images