JP6667121B2 - Method for manufacturing composite container, composite preform, composite container, and plastic member - 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 for storing content liquids such as food and drink have become popular, and such plastic bottles store the content liquid.

  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, for example, a preform containing a single layer material such as PET or PP, a multilayer material, a blend material, or the like is used to mold the container into a container shape. However, in the conventional biaxial stretch blow molding method, it is common to simply mold the preform into a container shape. For this reason, when giving various functions and characteristics (barrier property, heat insulation property, etc.) to the container, the means for changing the material of the preform is limited, for example.

JP 2009-241526 A

  Further, conventionally, after filling the container with the content liquid, the container is sealed with a cap, and a label is provided around the container with a labeler. However, there is a problem that, by installing a labeler and applying a label, the manufacturing cost increases and the yield decreases.

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

  The present invention provides a method for manufacturing a composite container, comprising the steps of: preparing a preform made of a plastic material; providing a plastic member outside the preform; and blowing the preform and the plastic member. A step of integrally expanding the preform and the plastic member by performing molding, wherein the first print region and the first print region are different from each other in the plastic member after blow molding. And forming a printing blank area provided at a position.

  The present invention is the method for manufacturing a composite container, wherein the first printing region is formed after the preform and the plastic member are integrally expanded.

  The present invention is a method for manufacturing a composite container, wherein a plastic member on which the first printing region is formed in advance is provided outside the preform.

  The present invention is characterized in that, after a plastic member is provided outside the preform, the first printing area is formed before performing blow molding on the preform and the plastic member. This is a method for manufacturing a composite container.

  The present invention is the method of manufacturing a composite container, further comprising a step of forming a second printing area in the printing blank area.

  The present invention is a method for manufacturing a composite container, wherein the second printing region is formed before the content liquid is filled after the preform and the plastic member are integrally expanded.

  The present invention is a method for manufacturing a composite container, wherein the preform and the plastic member are integrally expanded, filled with a content liquid, and then the second printing region is formed.

  The present invention is the method for manufacturing a composite container, wherein the second printing area is formed in a vending machine.

  The present invention provides a composite preform, comprising: a preform made of a plastic material; and a plastic member provided so as to surround the outside of the preform, wherein the plastic member is in close contact with the outside of the preform. Wherein a first printing area and a printing blank area provided at a position different from the first printing area are formed on the plastic member. .

  The present invention provides a composite container, comprising: a container body made of a plastic material; and a plastic member provided in close contact with the outside of the container body, wherein the container body and the plastic member are integrally formed by blow molding. A composite container which is inflated, wherein a first printing region and a printing blank region provided at a position different from the first printing region are formed in the plastic member. is there.

  The present invention is the composite container, wherein a second printing area is formed in the printing blank area.

  The present invention provides a composite preform having the preform and a plastic member adhered to the outside of the preform by being mounted so as to surround the outside of the preform and integrally heated together with the preform. A plastic member for manufacturing the preform, having a cylindrical body covering at least the body of the preform, a first printing area, provided at a different position from the first printing area And a printing blank region.

  According to the present invention, since the plastic member is printed, there is no need to provide a step of applying a label with a labeler after the container is sealed. Further, since the first printing region and the printing blank region are formed in the plastic member, printing can be separately performed on the printing blank region. As a result, various designs can be provided as compared with the case where only a single printing area is printed on the container, and a composite container having a good design can be provided.

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 cross-sectional view (cross-sectional view taken along the line II-II in FIG. 1) showing the composite container according to the first embodiment of the present invention. FIG. 3 is a partial vertical sectional view showing the composite preform according to the first embodiment of the present invention. FIGS. 4A to 4D are perspective views showing various plastic members. FIGS. 5A to 5G are schematic diagrams illustrating a method for manufacturing a composite container according to the first embodiment of the present invention. FIG. 6 is a schematic diagram illustrating an example of a printer that performs printing on a composite container. FIG. 7 is a schematic diagram illustrating another example of a printer that performs printing on a composite container. 8 (a) to 8 (c) are schematic views showing a method for manufacturing a content container. FIGS. 9A to 9G are schematic diagrams illustrating a method for manufacturing a composite container according to a modified example of the first embodiment of the present invention. FIGS. 10A to 10H are schematic views showing a method for manufacturing a composite container according to a modification of the first embodiment of the present invention. FIG. 11 is a partial vertical sectional view showing a modified example of the composite container according to the first embodiment of the present invention. FIG. 12 is a partial vertical sectional view showing a modification of the composite preform according to the first embodiment of the present invention. FIG. 13 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 14 is a horizontal cross-sectional view (cross-sectional view taken along line XIV-XIV in FIG. 13) showing the composite container according to the second embodiment of the present invention. FIG. 15 is a partial vertical sectional view showing a composite preform according to a second embodiment of the present invention. FIGS. 16A to 16G are schematic diagrams illustrating a method for manufacturing a composite container according to the second embodiment of the present invention. FIGS. 17A to 17G are schematic diagrams illustrating a method for manufacturing a composite container according to a modification of the second embodiment of the present invention. FIGS. 18A to 18H are schematic diagrams illustrating a method for manufacturing a composite container according to a modification of the second embodiment of the present invention. FIG. 19 is a partial vertical sectional view showing a modification of the composite container according to the second embodiment of the present invention. FIG. 20 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, 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 manufactured by the method (blow molding method) for manufacturing a composite container according to the present embodiment will be described with reference to FIGS. In this specification, “upper” and “lower” refer to upper and lower sides in a state where the composite container 10A is erected (FIG. 1), respectively.

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

  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 portion. And a bottom part 30 provided below the part 20.

  On the other hand, the plastic member 40 is closely attached to the outer surface of the container main body 10 in a state of being thinly extended, 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. The container body 10 has the mouth 11, the neck 13, the shoulder 12, the trunk 20, and the bottom 30 as described above.

  The opening 11 has a screw portion 14 screwed to a cap (not shown) and a flange portion 17 provided below the screw portion 14. Note that the shape of the mouth portion 11 may be a conventionally known shape. The container body 10 is filled with a content L such as a content liquid, and a cap 18 is screwed onto the mouth portion 11 to produce a content-containing container 10B (see FIG. 8B).

  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 portion 12 is located between the neck portion 13 and the body portion 20 and has a shape whose diameter gradually increases from the neck portion 13 side toward the body portion 20 side.

  Further, the body 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 20 may have a polygonal cylindrical shape such as a rectangular cylindrical shape or an octagonal cylindrical shape. Alternatively, the body 20 may have a tubular shape having a horizontal cross section that is not uniform from above to below. Further, in the present embodiment, the body portion 20 has no substantially uneven surface and a substantially flat surface, but is not limited thereto. For example, unevenness such as a panel or a groove may be formed on the body 20.

  On the other hand, the bottom portion 30 has a concave portion 31 located at the center and a ground 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).

  The thickness of the container body 10 in the body 20 is not limited to this, but can be reduced to, for example, about 50 μm to 250 μm (50 μm or more and 250 μm or less; the same applies hereinafter). Further, the weight of the container body 10 is not limited to this, but can be 10 g to 20 g. By reducing the thickness of the container body 10 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 a material of the preform 10a, that is, a material of the container body 10, a thermoplastic resin, particularly, PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate) may 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 various resins described above may be blended and used. Further, a vapor-deposited 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 properties of the container.

  Further, the container body 10 can be formed as a multilayer molded bottle having two or more layers. That is, for example, by extrusion molding or injection molding, the intermediate layer is provided with a gas barrier property such as MXD6, MXD6 + fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate) and a light shielding property. The preform 10a composed of three or more layers as a resin (intermediate layer) may be formed into a multilayer bottle having gas barrier properties and light shielding properties by extrusion molding and then blow molding. As the intermediate layer, a resin obtained by blending the above various resins may be used.

  Further, by mixing an inert gas (nitrogen gas, argon gas) with a 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 body 10 may be manufactured. Since such a container body 10 has a built-in foam cell, the light shielding property of the entire container body 10 can be enhanced.

  Such a container body 10 may be composed 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 closely adhered to the outside of the preform 10a and then biaxially stretch blow-molded together with the preform 10a. It is a thing.

  The plastic member 40 is attached to the outer surface of the container main body 10 without being adhered thereto, and is in close contact with the container main 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 body 10, and has a substantially circular horizontal cross section.

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

  Note that the plastic member 40 may be provided in the entire or a part of the container body 10 other than the mouth 11. For example, the plastic member 40 may be provided so as to cover the entire neck portion 13, the shoulder portion 12, the trunk portion 20, and the bottom portion 30 of the container main body 10 except for the mouth portion 11. Further, the number of the plastic members 40 is not limited to one, and a plurality of members may be provided. For example, two plastic members 40 may be provided on the outer surface of the shoulder 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 removed from the container body 10 and removed. Specifically, for example, the plastic member 40 is cut off using a cutting tool or the like, or a cutting line (not shown) is provided in advance on the plastic member 40, and the plastic member 40 is peeled off along the cutting line. it 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 related art.

  Such a plastic member 40 may have no function of contracting the preform 10a or may have a function of contracting.

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

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

  By the way, in the present embodiment, a first print region 46 formed by performing printing in advance and a position different from the first print region 46 are provided outside the plastic member 40. And a printing blank area 45 not subjected to the printing. Further, in the printing blank area 45, a second printing area 43 on which printing is optionally performed may be provided. The first print area 46 and the second print area 43 are formed by applying a design or printing, for example, by a printing method such as an inkjet method, a gravure printing method, an offset printing method, and a flexographic printing method. is there. For example, when the ink jet method is used, the first print region 46 and the second print region 43 are formed by applying a UV curable ink to the plastic member 40 (40a), irradiating the UV curable ink thereto, and curing the same. Can be formed.

  The printing for forming the first printing area 46 is performed at a time before the printing for forming the second printing area 43. For example, printing for forming the first print region 46 may be performed on the plastic member 40 stretched by biaxial stretch blow molding as described later. Alternatively, printing for forming the first print region 46 may be performed on the plastic member 40a before being attached to the preform 10a, and the plastic member 40a is provided outside the preform 10a. It may be applied in a state. In this case, the printing for forming the first print area 46 may be performed before the container body 10 is filled with the contents, and after the container body 10 is filled with the contents, the printing is performed after the container body 10 is sealed. May be. The printing for forming the first print area 46 may be performed on the inside of the plastic member 40 (40a). In this case, it is possible to prevent a problem that the printing is separated due to abrasion or abrasion applied from the outside.

  On the other hand, printing for forming the second print region 43 is performed on the plastic member 40 stretched by biaxial stretch blow molding, as described later. In this case, the printing for forming the second print region 43 is performed after the container body 10 is filled with the contents and then sealed, but is not limited to this, and the container body 10 is filled with the contents. May be done before.

  By providing the first print area 46 and the second print area 43 outside the plastic member 40, the composite container 10A can be provided with an image or the like without separately labeling the container body 10 after blow molding. Characters can be displayed. For example, a plastic member 40 may be provided on all or a part of the body 20 of the container body 10 to display images and characters on the body 20. The first print area 46 and the second print area 43 may be provided in a partial area of the plastic member 40, respectively. In addition, one or more of the first print area 46 and the second print area 43 may be provided. Items displayed in the first print area 46 and the second print area 43 may be character information such as a name of a content liquid, a manufacturer, and a raw material name, in addition to a design and a product name.

  In FIG. 1, the first printing region 46 is formed on the plastic member 40 as described above, and the second printing region 43 is a printing blank located at a position different from the first printing region 46. It is formed in a region 45. The second print area 43 may be provided in a part of the print blank area 45 (see FIG. 1), or may be provided in the entire print blank area 45. In FIG. 1, the first print area 46 is indicated by hatching (gray), and the second print area 43 is indicated by virtual lines (two-dot chain line). By providing the first printing area 46 and the second printing area 43 in the plastic member 40 in this manner, the first printing area 46 is used in advance as a product name, a content liquid name, a manufacturer, a raw material name, and the like. The information common to the composite container 10A, such as the date and the lot number, can be printed as the second print area 43 in advance. For this reason, the degree of freedom in designing the plastic member 40 as a whole can be increased by variously changing the print content of the second print area 43.

  The second print area 43 may be printed, for example, in the vending machine 100 (see FIG. 8C). In this case, the items described in the second print area 43 include the design, the product name, the name of the content liquid, the manufacturer, the name of the raw material, and the like, as well as the content container 10B for each vending machine 100 or sold. The print content may be set individually for each (see FIG. 8C). For example, the printed content may be items related to the date and time when the content container 10B was sold, the location (place name, facility name, etc.) where the vending machine 100 is installed, and the like.

  The second print area 43 may be formed not only inside the print blank area 45 but also over the first print area 46. In this case, by overlapping the second print area 43 with the first print area 46 in this manner, various designs can be provided by overlapping two images, and a visual effect rich in design is provided. Can be obtained. Further, the first printing area 46 is also extended by stretching the plastic member 40a, so that the second printing area 43 is overlapped even when the printing of the first printing area 46 is thin. This can compensate for the thinned print.

  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 outside the preform 10a.

  The preform 10a includes a mouth 11a, a body 20a connected to the mouth 11a, and a bottom 30a connected to the body 20a. The mouth 11 a corresponds to the mouth 11 of the container body 10 described above, and has substantially the same shape as the mouth 11. The body 20a corresponds to the neck 13, the shoulder 12, and the body 20 of the container body 10 described above, and has a substantially cylindrical shape. The bottom 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 adhered thereto, and is adhered to the preform 10a so as not to move or rotate, or to such an extent that it does not drop 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 trunk portion 20a except for 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 whole area or a part of the area other than the mouth 11a. For example, the plastic member 40a may be provided so as to cover the entirety of the neck 13a, the body 20a, and the bottom 30a except for the mouth 11a. Further, the number of the plastic member 40a is not limited to one, and a plurality of plastic members may be provided. For example, two plastic members 40a may be provided at two locations outside the body 20a.

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

  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, etc. However, the present invention is not limited to this, and a molding method other than the above may be used.

  On the other hand, when the plastic member (outside contraction member) 40a has a function of contracting, the plastic member (outside contraction member) 40a is attached to the preform 10a when, for example, an external function (for example, heat) is applied. On the other hand, one that contracts (for example, heat contracts) may be used. Alternatively, the plastic member (outside contraction member) 40a may itself be contractible or elastic, and may be contractable without adding an external action.

  As the plastic member 40a, for example, polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluorine resin, polymethyl methacrylate, polyacrylic acid, 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 , Polycarbonate, ethylene polyterephthalate, polybutylene terephthalate, ethylene polynaphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyether ketone, polyether ether ketone, unsaturated polyester, alkyd resin, polyimide, polysulfone, polyphenylene Examples thereof include sulfide, polyether sulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, and epoxy resin. Among them, it is preferable to use a thermoplastic inelastic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). Further, a blend material, a multilayer structure, or a partial multilayer structure thereof may be used. Further, various additives other than the main component resin may be added to the material of the plastic member 40a as long as the properties are not impaired. Examples of additives include a plasticizer, an ultraviolet stabilizer, a coloring inhibitor, a matting agent, a deodorant, a flame retardant, a weathering agent, an antistatic agent, a yarn friction reducing agent, a slip agent, a release agent, An oxidizing agent, an ion exchange agent, a coloring pigment, and the like can be added. Further, by mixing an inert gas (nitrogen gas, argon gas) into a melt of the thermoplastic resin, a foamed member having a foamed cell diameter of 0.5 to 100 μm is used, and this foamed preform is molded. In addition, light-shielding properties can be improved.

  Further, the plastic member 40a may be made of the same material as the container body 10 (preform 10a). In this case, for example, the plastic member 40 can be selectively placed on a portion of the composite container 10A where the strength is desired to be increased, and the strength of the portion can be selectively increased. For example, a plastic member 40 may be provided around the shoulder 12 and the bottom 30 of the container body 10 to increase the strength of this portion. 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, without using a multilayer 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, the water vapor can be prevented from evaporating from the inside of the container to the outside, and a decrease in the internal capacity can be prevented. For example, a plastic member 40 may be provided on the entire region of the shoulder 12, neck 13, body 20 and bottom 30 of the container body 10 to enhance the gas barrier properties of this portion. Examples of such a material include PE (polyethylene), PP (polypropylene), MXD-6 (nylon), PGA (polyglycolic acid), EVOH (ethylene-vinyl alcohol copolymer), and oxygen-containing materials such as fatty acid salts. It is also conceivable to mix an absorbent material.

  Further, the plastic member 40a may be made of a material having a light barrier property against ultraviolet rays or the like. 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 can be enhanced, and the deterioration of the content liquid due to ultraviolet rays or the like can be prevented. For example, in the container body 10, a plastic member 40a may be provided on the entire region of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 to enhance the ultraviolet barrier property of this portion. As such a material, a blended material or a material obtained by adding a light-shielding resin to PET, PE, or PP can be considered. Alternatively, a foamed 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 a melt of a thermoplastic resin, may be used.

  Further, the plastic member 40a may be made of a material having a higher heat insulating property (a material having low thermal conductivity) 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. Thereby, the cold insulation of the composite container 10A is enhanced. For example, a plastic member 40 may be provided on all or a part of the body 20 of the container body 10 to enhance the coolness of the body 20. Further, when the user holds the composite container 10A, it is prevented that the composite container 10A becomes difficult to hold due to too cold. Examples of such a material include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, and melamine 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 from 1 to 200 μm, more preferably from 5 to 80 μm. The “average particle diameter” means a volume average particle diameter, 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 a glass or the like. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include a styrene resin such as a crosslinked styrene-acryl resin, a (meth) acryl resin such as an acrylonitrile-acryl resin, a phenol resin, a fluorine resin, a polyamide resin, and a polyimide. Resin, polycarbonate resin, polyether resin and the like. In addition, Ropeike HP-1055, Ropeke HP-91, Ropeke OP-84J, Ropeke Ultra, Ropeke SE, Ropeke ST (manufactured by Rohm and Haas Co., Ltd.), Nipol MH-5055 (manufactured by Nippon Zeon Co., Ltd.), SX8782 And SX866 (manufactured by JSR Corporation) can also be used. The content of the hollow particles is preferably 0.01 to 50 parts by mass, more preferably 1 to 20 parts by mass, based on 100 parts by mass of the resin material contained in the plastic member 40a.

  Further, the plastic member 40a may be made of a material that is less slippery than the plastic material forming 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, a plastic member 40 may be provided on all or a part of the body 20 of the container body 10 to make the body 20 easier to hold.

  The plastic member 40a may be colored red, blue, yellow, green, brown, black, white, or the like, and may be transparent or opaque. In addition, the plastic member 40a is provided at a position different from the first printing area 46a on which the design or printing or the like has been printed in advance, and is provided at a position different from the first printing area 46a. A blank area 45a may be formed. The first print area 46a and the print blank area 45a correspond to the first print area 46 and the print blank area 45, respectively, of the blow-molded plastic member 40 described above. The first print area 46a is formed by designing or printing on a plain plastic member 40a by a printing method such as an inkjet method, a gravure printing method, an offset printing method, a flexographic printing method, or the like. is there. This 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 outside the preform 10a. The printing (first printing area 46a) 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 having one surface printed thereon and forming the film in a tubular shape such that the one surface is inside (FIG. 4 (c) and FIG. 4 (d)). Alternatively, an inkjet nozzle may be inserted inside the cylindrical plastic member 40a, and printing may be performed on the inside of the plastic member 40 by an inkjet method. Items displayed in the first print area 46a may be character information such as a name of a content liquid, a manufacturer, and a raw material name, in addition to a design, a product name, and the like.

  In this case, printing for forming the first print area 46a may be repeatedly performed a plurality of times. Thereby, even after the first print area 46a is elongated after the blow molding, the first print area 46a can be clearly displayed. The ink used for printing does not matter, but it is preferable to use a highly stretchable ink so that the first print area 46a is clearly displayed even after being stretched by biaxial stretch blow molding. Examples of such highly stretchable ink include UV curable ink and EB curable ink.

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

  As shown in FIGS. 3 and 4A, the plastic member 40 a has a bottomed cylindrical shape as a whole, and has a cylindrical body 41 and a bottom 42 connected to the body 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. As such a plastic member 40a, for example, the blow tube and the sheet molding tube described above can be cited.

  Also, as shown in FIG. 12 (described later) and FIG. 4B, the plastic member 40a has a cylindrical shape (bottomless cylindrical shape) as a whole, and may have a cylindrical body portion 41. good. In this case, as the plastic member 40a, for example, the blow tube, the extrusion tube, the inflation molded tube, and the sheet molded tube described above can be used.

  Further, as shown in FIGS. 4C and 4D, the plastic member 40a may be manufactured by forming a film into a tubular shape and bonding the ends thereof. In this case, as shown in FIG. 4C, the plastic member 40a may be formed in a tubular shape (a bottomless cylindrical shape) having a body portion 41, and as shown in FIG. The bottom portion 42 may be bonded to form a bottomed cylindrical shape.

  Next, a method for manufacturing the composite container 10A (blow molding method) 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 injection molding machine (not shown). Further, as the preform 10a, a preform generally used conventionally may be used.

  Next, by providing a plastic member 40a outside the preform 10a, a composite preform 70 having the preform 10a and the plastic member 40a closely attached to the outside of the preform 10a is manufactured (FIG. 5 ( b)). In this case, the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body 41 and a bottom 42 connected to the body 41.

  At this time, a plastic member 40a having an inner diameter 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 in close contact with the outer surface of the preform 10a. Alternatively, as described below, a heat-shrinkable plastic member 40a is provided on the outer surface of the preform 10a, and the plastic member 40a is heated to 50 ° C. to 100 ° C. so as to be thermally shrunk to form an outer surface of the preform 10a. May be adhered to.

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

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 5C). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth 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 formed using the blow mold 50. In this case, the blow mold 50 includes a pair of body molds 50a and 50b 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 sealed by the pair of body molds 50a and 50b and the bottom mold 50c. The blow molding die 50 is constructed. Next, air is press-fitted into the preform 10a, and biaxial stretch blow molding is performed on the composite preform 70.

  Thereby, the container main body 10 is 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 mold 50, the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded. Thereby, the preform 10a and the plastic member 40a are integrally formed into a shape corresponding to the inner surface of the blow molding die 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. 5F, the pair of body dies 50a and 50b and the bottom die 50c are separated from each other, and the composite container 10A is taken out from the blow molding die 50.

  Subsequently, printing is performed on the outside of the plastic member 40 expanded by blow molding to form a first print region 46. At this time, a printing blank area 45 on which printing is not performed is formed at a position different from the first printing area 46 (FIG. 5G). The printing method is not limited, but for example, an inkjet method may be used. In this case, 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 40 using a known printer 80 (printing device) of an ink jet system. Before printing, the plastic member 40 may be subjected to a surface treatment such as a primer treatment or a 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 a printing method (direct print) 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, a printer 80 includes a head 81 on which the composite container 10A is mounted and which rotates (revolves and revolves) the composite container 10A, and ink spraying that sprays ink of each color on the composite container 10A mounted on the head 81. And an ink curing unit 83 for curing the ink attached to the composite container 10A. In this case, the ink of each color is sprayed in the ink spraying unit 82 while rotating and revolving around the composite container 10A mounted on the head 81. Thereafter, the composite container 10A is raised in the head 81, and the ink is cured by, for example, UV in the ink curing unit 83. Thereby, printing is performed on the outside of the plastic member 40.

  FIG. 7 shows another example of a printer for printing on a composite container. 7, the printer 80 has a plurality of wheels 84 and 85 for transporting the composite container 10A and rotating (rotating and revolving) the composite container 10A. The plurality of wheels 84, 85 include an ink spraying wheel 84 that sprays ink of each color, and an ink curing wheel 85 that cures the ink attached to the composite container 10A. In this case, while the composite container 10 </ b> A is sequentially conveyed by each ink spraying wheel 84, each color of ink is sprayed at the ink spraying unit 86 of each ink spraying wheel 84. Thereafter, the composite container 10A is transported to an ink curing wheel 85, where the ink is cured, for example, by UV. Thereby, printing is performed on the outside of the plastic member 40.

  Thus, the composite container 10A shown in FIG. 1 is obtained.

  Subsequently, as shown in FIG. 8A, the contents L are filled into the container main body 10 from the mouth 11 of the composite container 10A.

  Thereafter, as shown in FIG. 8B, a cap 18 is attached to the mouth portion 11 of the composite container 10A, thereby obtaining the content container 10B including the composite container 10A, the content L, and the cap 18. Can be

  Subsequently, printing is performed on the outside of the plastic member 40 of the content container 10B to form a second print area 43 (FIG. 8C). The second print area 43 is formed in the print blank area 45. The printing method is not limited, but for example, an inkjet method may be used. In this case, 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 40 using a known printer 80a (printing device) of an ink jet system. Before printing, the plastic member 40 may be subjected to a surface treatment such as a primer treatment or a corona treatment in advance. Examples of the ink used for printing include UV curable ink and EB curable ink.

  The second print area 43 may be applied at a time later than the printing for forming the first print area 46, and may be performed by any printing means. For example, as shown in FIG. 8C, the second print area 43 may be formed by a printer 80a (printing device) provided in the vending machine 100. In this case, since printing can be performed on the content container 10B inside the vending machine 100, the printing content can be changed for each vending machine 100, or the printing content can be changed for each content container 10B to be sold. Can be changed.

  In the above description, the case where the first printing region 46 is formed outside the plastic member 40 after the preform 10a and the plastic member 40a are integrally expanded is described as an example, but is not limited thereto. is not. For example, the composite preform 70 (FIG. 3) may be manufactured by providing a plastic member 40a in which the first print area 46a is formed in advance on the outside or inside of the preform 10a. Thereafter, the first print area 46a may be stretched together with the plastic member 40a by performing blow molding on the composite preform 70, and the first print area 46 may be formed.

  In this case, printing may be repeatedly performed a plurality of times. Thereby, even after the first print area 46a is elongated after the blow molding, the first print area 46 can be clearly displayed. The ink used for printing does not matter, but it is preferable to use a highly stretchable ink so that the first print area 46 is clearly displayed even after being stretched by biaxial stretch blow molding. Examples of such highly stretchable ink include UV curable ink and EB curable ink.

  Alternatively, an unprinted plastic member 40a may be provided outside the preform 10a, and the first print area 46a may be formed outside the plastic member 40a before blow molding. . Thereafter, the first print area 46a may be stretched together with the plastic member 40a by performing blow molding on the composite preform 70, and the first print area 46 may be formed.

  In the above description, the case where the second printing region 43 is formed after filling the composite container 10A with the content liquid L and sealing the composite container 10A with the cap 18 has been described as an example. However, the present invention is not limited thereto, and the second print area 43 may be formed outside the composite container 10A before filling the content liquid L into the composite container 10A.

Modified Example of Manufacturing Method of Composite Container Next, a modified example of the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment will be described with reference to FIGS. 9A to 9G, the plastic member (outer contraction member) 40a has a function of contracting with respect to the preform 10a, and the other configuration is shown in FIG. 5A. (G). 9A to 9G, the same parts as those in FIGS. 5A to 5G are denoted 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 (outside contraction member) 40a is provided outside the preform 10a (see FIG. 9B). In this case, the plastic member (outer shrinkable member) 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body 41 and a bottom 42 connected to the body 41.

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

  As described above, when the plastic member (outside contraction member) 40a is heated, the plastic member (outside contraction member) 40a is thermally contracted and adheres to the outside of the preform 10a (see FIG. 9C). . When the plastic member (outside contraction member) 40a itself has contractibility, the plastic member (see FIG. 9B) is provided at the time when the plastic member (outside contraction member) 40a is provided outside the preform 10a. The (outer contraction member) 40a may be in close contact with the outside of the preform 10a.

  Subsequently, the preform 10a and the plastic member (outer contraction member) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 9D).

  The preform 10a and the plastic member (outside contraction member) 40a are molded using this blow molding die 50, and are substantially the same as those in FIGS. 5A to 5G described above. Thus, a composite container 10A including a plastic member (outside contraction member) 40 provided on the outer surface of the container body 10 is obtained (see FIGS. 9D to 9F). Thereafter, printing is performed on the outside of the expanded plastic member 40 using a printer 80, thereby forming a first print region 46 (FIG. 9G).

  Next, with reference to FIGS. 10 (a) to 10 (h), another modification of the method of manufacturing (blow molding) the composite container 10A according to the present embodiment will be described. In the modification shown in FIGS. 10A to 10H, the plastic member (outside contraction member) 40a has an action of contracting with respect to the preform 10a, and the preform 10a and the plastic member (outside contraction member) 40a. Are heated in two stages, and the other configurations are substantially the same as those shown in FIGS. 5 (a) to 5 (g). 10 (a) to 10 (h), the same parts as those in FIGS. 5 (a) to 5 (g) are denoted by the same reference numerals, and detailed description is omitted.

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

  Next, a plastic member (outside contraction member) 40a is provided outside the preform 10a (see FIG. 10B).

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

  When the plastic member (outside contraction member) 40a is heated, the plastic member (outside contraction member) 40a thermally contracts and adheres to the outside of the preform 10a. As a result, a composite preform 70 having the preform 10a and the plastic member (outside contraction member) 40a adhered to the outside of the preform 10a is obtained (see FIG. 10C).

  In this way, the plastic preform 10a is heated and brought into close contact with the outside of the preform 10a in advance by using the first heating device 55 to produce the composite preform 70. (FIGS. 10A to 10C) and a series of steps (FIGS. 10D to 10H) for producing the composite container 10A by blow molding at different locations (such as a factory). ).

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 10D). 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 11a facing downward. The heating temperature of the preform 10a and the plastic member (outer contraction 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. 10E). In this case, heating for thermally shrinking the plastic member (outer shrinking member) 40a and heating for blow molding the preform 10a can be performed in the same step.

  The composite preform 70 is molded using the blow molding die 50, and is provided on the outer surface of the container body 10 and the container body 10 in substantially the same manner as in the above-described cases of FIGS. Thus, a composite container 10A including the plastic member (outer contraction member) 40 is obtained (see FIGS. 10E to 10G). Thereafter, printing is performed using a printer 80 on the outside of the expanded plastic member 40 to form a first print region 46 (FIG. 10H).

  After the respective steps shown in FIGS. 9A to 9G and FIGS. 10A to 10H, similarly to the above-described embodiment (see FIGS. 8A to 8C), the composite container 10A The contents L are filled into the container body 10 from the mouth 11 and the cap 18 is attached to the mouth 11, thereby obtaining the contents container 10B. Thereafter, printing is performed on the outside of the plastic member 40 (the printing blank area 45) to form the second printing area 43.

  9 (a) to 9 (g) and 10 (a) to 10 (h), after the preform 10a and the plastic member 40a are integrally expanded, the first printing area is formed outside the plastic member 40. Although 46 is formed, it is not limited to this. On the outside of the preform 10a, a plastic member 40a in which the first print area 46a is formed in advance may be provided, or after the plastic member 40a is provided on the outside of the preform 10a (FIG. 9B). After the step of FIG. 10C), the first print area 46 may be formed outside the plastic member 40a.

  As described above, according to the present embodiment, by performing blow molding on the composite preform 70 in the blow molding die 50, the preform 10a of the composite preform 70 and the plastic member 40a are integrally formed. To produce a composite container 10A including the container body 10 and the plastic member 40. Thereby, the preform 10a (container main body 10) and the plastic member 40a (plastic member 40) can be constituted by different members. Therefore, by appropriately selecting the type and shape of the plastic member 40, various functions and characteristics can be freely imparted to the composite container 10A.

  Further, according to the present embodiment, when manufacturing the composite container 10A, a general blow molding apparatus can be used as it is, so that it is necessary to prepare new molding equipment for manufacturing the composite container 10A. Absent. Further, since the plastic member 40a is provided outside the preform 10a, there is no need to prepare new molding equipment for molding the preform 10a.

  Furthermore, according to the present embodiment, since printing is performed on the plastic member 40, it is necessary to provide a step of applying a content liquid to the composite container 10A, sealing the container, and then applying a label using a labeler. Absent. Thereby, the manufacturing cost for manufacturing the final product can be suppressed. In addition, it is possible to prevent a decrease in yield when manufacturing a final product due to a defect of a labeler or the like.

  Further, according to the present embodiment, the first printing area 46 and the printing blank area 45 are formed on the plastic member 40, so that the printing is performed separately on the printing blank area 45 (the second printing area). Region 43) can be applied. Thus, the degree of freedom in designing the plastic member 40 as a whole can be increased by variously changing the print content of the second print area 43. Also, by changing the combination of the first print area 46 and the second print area 43, various designs can be provided as compared with the case where only a single print area is printed. It is possible to provide the composite container 10A having a high property.

  Further, according to the present embodiment, 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. On the other hand, as a comparative example, when printing is directly performed on the container body 10, there is a possibility that the recycling of the container body 10 becomes difficult.

Modified Example of Composite Container and Composite Preform Next, a modified example of the present embodiment will be described with reference to FIGS.

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

  In the composite container 10 </ b> A shown in FIG. 11, the plastic member 40 extends from the shoulder 12 of the container main body 10 to a lower portion of the body 20, but does not reach the bottom 30. In the composite preform 70 shown in FIG. 12, the plastic member 40a is adhered so as to cover only the trunk 20a of the preform 10a, and more specifically, the neck 13 of the container body 10 in the trunk 20a. And a region excluding a portion corresponding to the lower portion of the trunk portion 20a.

  11 and 12 are substantially the same as those of the embodiment shown in FIGS. 1 to 10. In the modifications shown in FIGS. 11 and 12, the same parts as those of the embodiment shown in FIGS. 1 to 10 are denoted by the same reference numerals, and detailed description will be omitted. 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. In FIGS. 11 and 12, a plastic member having a function of contracting 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. FIG. 13 to FIG. 20 are views showing a second embodiment of the present invention. In the second embodiment shown in FIGS. 13 to 20, the inner label member 60 (inner label member 60a) is provided between the container body 10 (preform 10a) and the plastic member 40 (plastic member 40a). It is provided. 13 to 20, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

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

  13 and 14, a composite preform 70 (see FIG. 15) including a preform 10a, an inner label member 60a, and a plastic member 40a using a blow mold 50 as described later. On the other hand, by performing biaxial stretch blow molding, the preform 10a of the composite preform 70, the inner label member 60a, and the plastic member 40a are integrally expanded and obtained.

  Such a composite container 10A includes 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 a close contact provided on the outside of the inner label member 60. Plastic member 40 provided.

  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 in close contact with the outer surface of the container main 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 main body 10 so as not to easily move or rotate. I have.

  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 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).

  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 being biaxially stretch blow-molded integrally with the preform 10a and the plastic member 40a. Things.

  The inner label member 60 is attached to the outer surface of the container body 10 without being adhered thereto, and is tightly attached to 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 and covers the container body 10. As shown in FIG. 14, 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 12, the trunk 20, and the bottom 30 of the container main body 10 except for the mouth 11 and the neck 13. Accordingly, desired characters, images, and the like can be given to the shoulder portion 12, the trunk portion 20, and the bottom portion 30 of the container body 10, and the composite container 10A can be provided with decorativeness or display information.

  Note that the inner label member 60 may be provided in the whole or a part of the container body 10 other than the mouth 11. For example, the inner label member 60 may be provided so as to cover the entire neck portion 13, the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11. Further, the number of the inner label members 60 is not limited to one, but may be plural. Note that the inner label member 60 may be provided in the same region as the plastic member 40 or may be provided in a region smaller than the plastic member 40. In the latter case, the inner label member 60 is preferably completely covered by the plastic member 40.

  The thickness of the inner label member 60 is not limited to this, but can be, for example, about 1 μm to 100 μm in a state where the inner label member 60 is 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 thereto, and is in close contact with the container body 10 so as not to move or rotate. On the outside of the plastic member 40, a first printing area 46 on which printing is performed and a printing blank area 45 provided at a position different from the first printing area 46 and on which no printing is performed are formed. Have been. Further, in the printing blank area 45, a second printing area 43 on which printing is optionally performed may be provided.

  In the present embodiment, a printed plastic member 40 is provided outside the inner label member 60. Thereby, the design of the image and the character of the inner label member 60 and the design of the image and the character of the plastic member 40 can be displayed in a superimposed manner.

  For example, by using a colored material as the inner label member 60, a light barrier property of a specific wavelength may be provided, while character information such as a product name or raw material may be displayed on the plastic member 40a. . 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 varied. Further, a unique design in which the design of the inner label member 60 and the design of the plastic member 40 are overlapped can be realized.

  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 is omitted here.

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

  As shown in FIG. 15, the composite preform 70 includes a preform 10a made of a plastic material, an inner label member 60a having a bottomed cylindrical shape provided in close contact with the outside of the preform 10a, and an inner label member 60a. 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 such that it does not easily move or rotate, or in such a degree that it does not drop by its own weight. The inner label member 60a is provided over the entire circumferential direction so as to surround the preform 10a, and has a substantially circular horizontal cross section.

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

  On the other hand, the plastic member 40a is attached to the outer surface of the inner label member 60a without being adhered thereto, and is in close contact with the preform 10a so as not to move or rotate, or so close as not to drop by its own weight. Have been.

  On the plastic member 40a, a first print area 46a on which a design or printing or the like has been printed in advance, and a print blank area provided at a position different from the first print area 46a and not printed. 45a are formed.

  Note that the inner label member 60a and the plastic member 40a may be provided in the entire area or a partial area other than the mouth 11a. For example, the inner label member 60a and the plastic member 40a may be provided so as to cover the entire body 20a and the bottom 30a except for the mouth 11a. Further, the number of the inner label member 60a and the plastic member 40a is not limited to one, but may be plural. For example, two inner label members 60a and two plastic members 40a may be provided at two outer positions of the body 20a.

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

  Next, a method for manufacturing the composite container 10A (blow molding method) 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. 16A).

  Next, the inside label member 60a is provided outside the preform 10a, and the plastic member 40a is provided outside the inside label member 60a. Thus, a composite preform 70 having the preform 10a, the inner label member 60a closely adhered to the outside of the preform 10a, and the plastic member 40a closely adhered to the outside of the inner label member 60a is manufactured (FIG. 16). (B)). In this case, the inner label member 60a has a bottomed cylindrical shape as a whole, and has a cylindrical body 61 and a bottom 62 connected to the body 61.

  At this time, 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, respectively, so that the inner label member 60a and the plastic member 40a 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 thermally shrunk by heating to 50 ° C to 100 ° C. It may be in close contact with the outer surface of the preform 10a.

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

  As described above, the plastic member 40a is brought into close contact with the outside of the preform 10a and the inner label member 60a to prepare the composite preform 70, and thus a series of steps for producing the composite preform 70 (FIG. 16 ( a) to (b)) and a series of steps (FIGS. 16 (d) to (g)) for producing the composite container 10A by blow molding can be performed in different places (factories and the like).

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 16C).

  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 the container main body 10 and the inner label member provided on the outer surface of the container main body 10 are substantially similar to the case of the first embodiment described above. A composite container 10 </ b> A including the second label 60 and the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 16D to 16F). Thereafter, printing is performed on the outside of the expanded plastic member 40 using, for example, a printer 80, so that the first printing area 46 and the first printing area 46 are provided at different positions, and printing is performed. An unprinted printing blank area 45 is formed (FIG. 16G).

  Thereafter, similarly to the above-described embodiment (see FIGS. 8A to 8C), the contents L are filled into the container body 10 from the mouth 11 of the composite container 10A, and the cap 18 is attached to the mouth 11. Thereby, the contents container 10B is obtained. Thereafter, printing is performed on the outside of the plastic member 40 (the printing blank area 45) to form the second printing area 43.

  16A to 16G, after the preform 10a, the inner label member 60a, and the plastic member 40a are integrally expanded, a first print region 46 is formed outside the plastic member 40. But it is not limited to this. A plastic member 40a in which the first print area 46a is formed in advance may be provided outside the preform 10a and the inner label member 60a, or the inner label member 60a and the plastic member 40a may be provided outside the preform 10a. (After the step of FIG. 16B), the first print region 46 may be formed outside the plastic member 40a.

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

Modifications of Blow Molding Method FIGS. 17 (a) to 17 (g) and FIGS. 18 (a) to 18 (h) each show a modification of the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment. It is. 17 (a) to 17 (g) and FIGS. 18 (a) to 18 (h), the same parts as those in FIGS. 1 to 16 are denoted by the same reference numerals, and detailed description is omitted.

  The modified example shown in FIGS. 17A to 17G is one in which an inner label member 60 is provided outside the preform 10a and a plastic member (outer contraction member) 40a is provided outside the inner label member 60. The other configurations are substantially the same as those shown in FIGS. 9A to 9G.

  The modified examples shown in FIGS. 18A to 18H are provided with an inner label member 60 outside the preform 10 a and a plastic member (outer contraction member) 40 a outside the inner label member 60. The other configurations are substantially the same as those shown in FIGS. 10 (a) to 10 (h).

Modified Example of Composite Container and Composite Preform Next, a modified example of the present embodiment will be described with reference to FIGS.

  The modification shown in FIGS. 19 and 20 does not have a body and a bottom as the inner label member 60a and the plastic member 40a, but uses a cylindrical inner label member 60a and the plastic member 40a. . Other configurations are substantially the same as those of the embodiment shown in FIGS. In the modified examples shown in FIGS. 19 and 20, the same parts as those in the embodiment shown in FIGS. 13 to 18 are denoted by the same reference numerals, and detailed description will be omitted. Also, the method for manufacturing the composite container 10A and the method for manufacturing the composite preform 70 are substantially the same as those in the embodiment shown in FIGS.

DESCRIPTION OF SYMBOLS 10 Container main body 10A Composite container 10a Preform 11, 11a Mouth part 12 Shoulder part 13 Neck part 14 Screw part 17 Flange part 20, 20a Body part 30, 30a Bottom part 31 Recess 32 Ground part 40, 40a Plastic member 41 Body part 42 Bottom part 43 second printing area 45, 45a printing blank area 46, 46a first printing area 50 blow mold 60, 60a inner label member 70 composite preform

Claims (8)

In the method for manufacturing a composite container,
Preparing a preform made of a plastic material;
Outside the preform, a step of removably providing a cylindrical plastic member that is seamless in the circumferential direction,
Performing blow molding on the preform and the plastic member to expand the preform and the plastic member integrally,
In the plastic member after blow molding, there is a first printing region and a printing blank region provided at a position different from the first printing region ,
Forming a second printing area in the printing blank area;
The second printing area is formed not only inside the printing blank area but also over the first printing area,
A method for manufacturing a composite container , wherein a cut line for peeling off the plastic member is provided on the plastic member after blow molding .   The method according to claim 1, wherein the first printing area is formed after the preform and the plastic member are integrally expanded.   The method for manufacturing a composite container according to claim 1, wherein a plastic member on which the first print region is formed in advance is provided outside the preform.   The first printing area is formed after providing a plastic member outside the preform and before performing blow molding on the preform and the plastic member. A method for producing a composite container. Wherein after the preform and the plastic member is expanded as integral, prior to filling the liquid content, method of manufacturing a composite container according to claim 1, wherein the forming the second print area. The preform and inflating integrally said plastic member, after filling the liquid content, method of manufacturing a composite container according to claim 1, wherein the forming the second print area. The second print area, method for producing the composite container of any one of claims 1 to 6, characterized in that it is formed in the vending machine. In a composite container,
A container body made of plastic material,
A cylindrical plastic member having no circumferential seam provided in close contact with the outside of the container body in a peelable manner,
The container body and the plastic member are expanded integrally by blow molding,
A first printing area and a printing blank area provided at a position different from the first printing area are formed on the plastic member ,
A second printing area is formed in the printing blank area,
The second printing area is formed not only inside the printing blank area but also over the first printing area,
A composite container , wherein a cutting line for peeling off the plastic member is provided on the plastic member .

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