JP2016120698A - Composite container and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite container to which various functions or characteristics can be imparted and to which the external appearance rich in design properties can be given by making conspicuous the ruggedness such as a pattern, that is formed on a trunk part thereof, and to provide a production method of the composite container.SOLUTION: A composite container 10A has a mouth part 11, a trunk part 20 and a bottom part 30 and includes a plastic material-made container body 10 and a plastic-made member 40 tightly stuck to the outside of the container body 10. The container body 10 and the plastic-made member 40 are expanded integrally by blow molding. A concave part 26 recessed to the inside of the container body 10 and a convex part 27 projected into the outside of the container body 10 are formed respectively on the trunk part 20 of the container body 10. The plastic-made member 40 is stuck tightly to the trunk part 20 of the container body 10 along a shape of the concave part 26 and that of the convex part 27.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite container and a method for manufacturing the same.

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

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

  By the way, in the conventional biaxial stretch blow molding method, for example, a preform including a single layer material such as PET or PP, a multilayer material, a blend material, or the like is used to form a container shape. However, in the conventional biaxial stretch blow molding method, the preform is generally simply formed into a container shape. For this reason, when various functions and characteristics (barrier property, heat retaining property, etc.) are given to the container, the means is limited, for example, by changing the material constituting the preform.

JP 2009-241526 A

  Conventionally, in addition to functional irregularities such as a vacuum absorbing panel, irregularities such as patterns having design properties have been imparted to the body of a beverage container. However, conventionally, after filling a container with a content liquid, it is common to seal the container using a cap and to apply a label around the container using a labeler. For this reason, there exists a problem that unevenness, such as a pattern attached | subjected to the trunk | drum, is covered with a label and becomes inconspicuous.

  The present invention has been made in consideration of such points, and while giving various functions and characteristics to the container, the appearance with rich design such as conspicuous irregularities such as patterns on the body It is an object to provide a composite container and a method for producing the same.

  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, the container body having a mouth, a body, and a bottom. And the plastic member is integrally expanded by blow molding, a concave portion recessed inside the container main body, and a convex portion protruding outside the container main body from the concave portion in the body portion of the container main body. And the plastic member is in close contact with the body portion of the container body along the shape of the concave portion and the convex portion.

  The present invention is the composite container characterized in that a printing region formed by printing is provided on the surface of the plastic member.

  According to the present invention, the printing area is provided at a position corresponding to the convex portion of the container main body in the plastic member, and printing is performed at a position corresponding to the concave portion of the container main body. A non-printing region that is not formed is formed.

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

  The present invention is the composite container characterized in that a plurality of the concave portions having the same shape are repeatedly and regularly arranged on the body portion of the container body.

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

  The present invention further includes an inner label member provided in close contact so as to surround the outer side of the container body, and the plastic member is provided in close contact with the outer side of the inner label member. The member is a composite container characterized by being in close contact with the body portion of the container body along the shape of the concave portion and the convex portion.

  The present invention relates to a method of manufacturing a composite container, a step of preparing a preform made of a plastic material, a step of providing a plastic member outside the preform, and blow molding the preform and the plastic member. The container body having a mouth portion, a body portion, and a bottom portion, and the plastic member provided in close contact with the outside of the container body by inflating the preform and the plastic member together. And forming a concave portion recessed inside the container main body and a convex portion projecting outside the container main body from the concave portion, respectively, in the body portion of the container main body. The plastic member is in close contact with the body portion of the container body along the shape of the concave portion and the convex portion. A method of manufacturing a composite container which is characterized and.

  The present invention is the method of manufacturing a composite container, further comprising a step of forming a printing region by printing on the surface of the plastic member.

  In the step of forming the printing area, the printing area is provided at a position corresponding to the convex portion of the container body in the plastic member, and a position corresponding to the concave portion of the container body. Is a method for manufacturing a composite container, characterized in that a non-printing area where printing is not performed is formed.

  The present invention is the method for manufacturing a composite container, wherein in the step of forming the print region, the print region is formed by an ink jet method.

  The present invention is the method for manufacturing a composite container, wherein a plurality of the concave portions having the same shape are repeatedly and regularly arranged on the body portion of the container body.

  The present invention is the method for manufacturing a composite container, wherein the plastic member is an outer contractive member having an effect of contracting the preform.

  The present invention further includes a step of providing an inner label member so as to surround the outer side of the preform, wherein the plastic member is provided on the outer side of the inner label member, and the inner label member includes the recessed portion and the inner label member. A method of manufacturing a composite container, wherein the container body is in close contact with the body part along the shape of the convex part.

  According to the present invention, the plastic member is in close contact with the body portion of the container body along the shape of the concave and convex portions. For this reason, the shape of the recessed part and convex part which were attached | subjected to the trunk | drum can be made conspicuous, and the composite container rich in the design property 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 sectional view showing the composite container according to the first embodiment of the present invention (sectional view taken along the line II-II in FIG. 1). FIG. 3 is a partial vertical sectional view showing the composite preform according to the first embodiment of the present invention. 4A to 4D are perspective views showing various plastic members. FIGS. 5A to 5G are schematic views showing a method for manufacturing the 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. FIGS. 8A to 8G are schematic views illustrating a method for manufacturing a composite container according to a modification of the first embodiment of the present invention. FIGS. 9A to 9H are schematic views showing a method for manufacturing a composite container according to a modification of the first embodiment of the present invention. FIG. 10 is a partial vertical sectional view showing a modification of the composite container according to the first embodiment of the present invention. FIG. 11 is a partial vertical sectional view showing a modification of the composite preform according to the first embodiment of the present invention. FIG. 12 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 13 is a horizontal sectional view showing the composite container according to the second embodiment of the present invention (cross sectional view taken along line XIII-XIII in FIG. 12). FIG. 14 is a partial vertical sectional view showing a composite preform according to the second embodiment of the present invention. FIGS. 15A to 15G are schematic views showing a method for manufacturing a composite container according to the second embodiment of the present invention. 16 (a) to 16 (g) are schematic views showing a method for manufacturing a composite container according to a modification of the second embodiment of the present invention. FIGS. 17A to 17H are schematic views illustrating a method for manufacturing a composite container according to a modification of the second embodiment of the present invention. FIG. 18 is a partial vertical sectional view showing a modification of the composite container according to the second embodiment of the present invention. FIG. 19 is a partial vertical sectional view showing a modification 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 11 are views showing a first embodiment of the present invention.

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

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

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

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

  On the other hand, the plastic member 40 is in close contact with the outer surface of the container main body 10 in a thinly extended state, and is attached to the container main body 10 without being easily moved or rotated.

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

  Of these, the mouth portion 11 includes a screw portion 14 screwed into a cap (not shown) and a flange portion 17 provided below the screw portion 14. The shape of the mouth portion 11 may be a conventionally known shape. The container body 10 is filled with the contents such as the contents liquid, and the cap 11 is screwed into the mouth portion 11, whereby the composite container containing the contents is manufactured. In the present embodiment, the composite container 10A may be such a composite container with contents.

  The neck portion 13 is located between the flange portion 17 and the shoulder portion 12 and has a substantially cylindrical shape having a substantially uniform diameter. The shoulder 12 is located between the neck 13 and the trunk 20 and has a shape whose diameter gradually increases from the neck 13 toward the trunk 20.

  Furthermore, the trunk | drum 20 has the cylindrical shape which has a substantially uniform diameter as a whole except the recessed part 26 mentioned later. However, the present invention is not limited to this, and the body portion 20 may have a polygonal cylindrical shape such as a rectangular cylindrical shape or an octagonal cylindrical shape. Or the trunk | drum 20 may have a cylinder shape with a horizontal cross section which is not uniform toward upper direction from the downward direction.

  Further, the body portion 20 is formed with a recess 26 that is recessed radially inward of the container body 10 and a protrusion 27 that protrudes radially outward of the container body 10 from the recess 26. In the present embodiment, the convex portion 27 constitutes a part of a cylindrical surface that continuously extends downward from the shoulder portion 12.

  In this case, a plurality of concave portions 26 having the same shape are repeatedly and regularly arranged on the body portion 20. Specifically, the body portion 20 is formed with a pattern (cloisonne pattern) in which circles having the same shape are arranged so that their circumferences are overlapped by a quarter. Spindle-shaped recesses 26 are provided in the portions where the circumferences overlap.

  However, the shape of the recessed part 26 and the convex part 27 formed in the trunk | drum 20 is arbitrary, and is not restricted to this. The shape of the recess 26 may be, for example, linear (straight or curved), polygon (triangle, quadrangle, hexagon, etc.), circle, ellipse, oval, semicircle, groove, or the like. Further, the plurality of recesses 26 are not necessarily arranged regularly.

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

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

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

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

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

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

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

  The plastic member 40 is attached to the outer surface of the container body 10 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. The plastic member 40 is thinly extended on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 2, the plastic member 40 is provided over the entire circumferential direction so as to surround the container body 10. The plastic member 40 is in close contact with the body portion 20 of the container body 10 along the shape of the concave portion 26 and the convex portion 27. That is, the plastic member 40 is in close contact with both the concave portion 26 and the convex portion 27 formed in the trunk portion 20 without any gap. For this reason, since an air layer is not formed between the plastic member 40 and the trunk | drum 20, the characteristics (gas barrier property etc.) which the plastic member 40 has are not impaired by an air layer.

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

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

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

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

  When the plastic member 40 has an action of contracting with respect to the preform 10a, the plastic member (outside contracting 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 set to, for example, about 5 μm to 500 μm in a state of being attached to the container body 10.

  By the way, in the present embodiment, a printing region 43 formed by printing is provided outside the plastic member 40. In this case, the printing region 43 is provided at a position corresponding to the convex portion 27 of the container body 10 in the plastic member 40. On the other hand, a non-printing region 45 that is not printed is formed at a position corresponding to the concave portion 26 of the container body 10 in the plastic member 40. That is, the boundary between the printing area 43 and the non-printing area 45 corresponds to the boundary between the convex portion 27 and the concave portion 26. Thereby, the difference between the convex part 27 and the concave part 26 can be made conspicuous, and the external appearance rich in design can be brought about by making the pattern given to the trunk | drum 20 conspicuous. In each drawing, the print area 43 is indicated by shading (gray).

  The print region 43 is formed by being designed or printed by a printing method such as an inkjet method, a gravure printing method, an offset printing method, or a flexographic printing method. For example, when the inkjet method is used, the printing region 43 can be formed by applying a UV curable ink to the plastic member 40, irradiating it with UV, and curing it.

  The printing for forming the printing region 43 is performed on the plastic member 40 stretched by biaxial stretch blow molding, as will be described later. In this case, the printing for forming the printing region 43 may be performed before the container body 10 is filled with the contents, or after the container body 10 is filled with the contents and after being sealed. good.

  By providing the printing area 43 outside the plastic member 40, it is possible to display images and characters on the composite container 10A without giving a label or the like to the container body 10 after blow molding. In addition, the printing area | region 43 may be provided in the whole region of the plastic members 40, respectively, and may be provided in a part. Further, the printing area 43 may be provided in the whole area or a partial area of the position corresponding to the convex portion 27 of the container body 10. The non-printing region 45 may be provided in the entire region or a partial region of the position corresponding to the convex portion 27 of the container body 10. Furthermore, the printing area 43 may be provided in the whole area or a partial area of the position corresponding to the concave portion 26 of the container body 10.

  The print area 43 may be an area filled with a single color such as red, blue, yellow, green, brown, black, or white (solid painting). Alternatively, the print area 43 may display character information such as the name of the content liquid, the manufacturer, and the raw material name in addition to the design and the product name.

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

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

  Among these, the preform 10a includes a mouth portion 11a, a body portion 20a connected to the mouth portion 11a, and a bottom portion 30a connected to the body portion 20a. Of these, the mouth portion 11 a corresponds to the mouth portion 11 of the container body 10 described above, and has substantially the same shape as the mouth portion 11. Moreover, the trunk | drum 20a respond | corresponds to the neck part 13, the shoulder part 12, and the trunk | drum 20 of the container main body 10 mentioned above, and has a substantially cylindrical shape. The bottom 30a corresponds to the bottom 30 of the container body 10 described above, and has a substantially hemispherical shape.

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

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

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

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

  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 molding methods other than those described above may be used.

  On the other hand, when the plastic member (outer contraction member) 40a has an action of contracting, the plastic member (outer contraction member) 40a is applied to the preform 10a when an external action (for example, heat) is applied, for example. What shrinks | contracts with respect (for example, heat shrink) may be used. Alternatively, the plastic member (outer contraction member) 40 itself may be contractible or elastic and can contract 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, polyvinyl acetate, Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, Ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluoro rubber, nylon 6, nylon 6,6, nylon MXD6, aromatic poly , Polycarbonate, ethylene polyterephthalate, polybutylene terephthalate, poly ethylene naphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyether ketone, polyether ether ketone, unsaturated polyester, alkyd resin, polyimide, polysulfone, polyphenylene Examples thereof include sulfide, polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, and epoxy resin. Among these, it is preferable to use thermoplastic inelastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). Moreover, those blend materials, multilayer structures, and partial multilayer structures may be used. Furthermore, 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. Examples of additives include plasticizers, UV stabilizers, anti-coloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, yarn friction reducing agents, slip agents, mold release agents, An oxidizing agent, an ion exchange agent, a coloring pigment, and the like can be added. Also, by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, a foam member having a foam cell diameter of 0.5 to 100 μm is used, and this foam preform is molded. , The light shielding property can be improved.

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

  The plastic member 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 multi-layer preform or a preform containing a blend material as the preform 10a, the gas barrier property of the composite container 10A is improved, oxygen is prevented from entering the container, and the content liquid is prevented from deteriorating. In addition, it is possible to prevent the evaporation of water vapor from the inside of the container to the outside and to prevent the internal volume from decreasing. For example, a plastic member 40 may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and the bottom portion 30 of the container body 10, and the gas barrier property of this portion may be improved. Examples of such materials include PE (polyethylene), PP (polypropylene), MXD-6 (nylon), PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer), and oxygen such as fatty acid salts in these materials. It is also possible to mix an absorbent material.

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

  In addition, the plastic member 40a may be made of a material having a higher cold-retaining property or higher heat-retaining property (a material having a lower 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 property or heat retention property of composite container 10A is improved. For example, the plastic member 40 may be provided on the whole or a part of the body 20 in the container body 10 to enhance the cold insulation or heat insulation of the body 20. Further, when the user grips the composite container 10A, it is prevented that the composite container 10A becomes difficult to hold due to being too cold or too hot. Examples of such materials include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. It is preferable to mix hollow particles with a resin material containing these resins. The average particle diameter of the hollow particles is preferably 1 to 200 μm, and more preferably 5 to 80 μm. The “average particle size” means the volume average particle size and is measured by a known method using a particle size distribution / particle size distribution measuring device (for example, Nanotrack particle size distribution measuring device, manufactured by Nikkiso Co., Ltd.). can do. The hollow particles may be organic hollow particles composed of a resin or the like, or may be inorganic hollow particles composed of glass or the like. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include styrene resins such as cross-linked styrene-acrylic resins, (meth) acrylic resins such as acrylonitrile-acrylic resins, phenolic resins, fluorine resins, polyamide resins, and polyimides. Resin, polycarbonate resin, polyether resin and the like. In addition, Ropeke HP-1055, Ropeke HP-91, Ropeke OP-84J, Ropeke Ultra, Ropeke SE, Ropeke ST (made by Rohm and Haas Co.), Nipol MH-5055 (made by Nippon Zeon Co., Ltd.), SX8782 Commercially available hollow particles such as SX866 (manufactured by JSR Corporation) can also be used. As content of a hollow particle, it is preferable that it is 0.01-50 mass parts with respect to 100 mass parts of resin materials contained in the plastic members 40a, and it is more preferable that it is 1-20 mass parts.

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

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

  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 includes a cylindrical body 41 and a bottom 42 connected to the body 41. May be. In this case, since the bottom part 42 of the plastic member 40a covers the bottom part 30a of the preform 10a, various functions and characteristics such as barrier properties are imparted to the bottom part 30 in addition to the trunk part 20 of the composite container 10A. Can do. Examples of such a plastic member 40a include the above-described blow tube and sheet molded tube.

  Further, as shown in FIG. 11 (described later) and FIG. 4B, the plastic member 40a has a circular tube shape (bottomless cylindrical shape) as a whole, and has a cylindrical body 41. good. In this case, as the plastic member 40a, for example, the above-described blow tube, extruded tube, inflation molded tube, or sheet molded tube can be used.

  Moreover, as shown in FIG.4 (c) and FIG.4 (d), the plastic members 40a may be produced by forming a film in a cylinder shape and bonding the edge part together. In this case, as shown in FIG. 4 (c), the plastic member 40a may be configured in a tubular shape (bottomless cylindrical shape) having a body portion 41, and as shown in FIG. 4 (d), The bottom 42 may be bonded to form a bottomed cylinder.

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

  First, a preform 10a made of a plastic material is prepared (see FIG. 5A). In this case, for example, the preform 10a may be manufactured by an injection molding method using an unillustrated injection molding machine. Moreover, you may use the preform generally used conventionally as the preform 10a.

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

  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 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 thermally contracted by heating to 50 ° C. to 100 ° C. You may make it stick to.

  In this way, a series of steps for producing the composite preform 70 (FIGS. 5A to 5B) are performed by previously bringing the plastic member 40a into close contact with the outside of the preform 10a and producing the composite preform 70. )) And a series of steps (FIGS. 5 (c) to 5 (g)) for producing the composite container 10A by blow molding can be carried out at different places (factories, etc.).

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

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

  The composite container 10 </ b> A is molded using this blow molding die 50. In this case, the blow mold 50 is composed of a pair of body molds 50a and 50b and a bottom mold 50c which are divided from each other (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. 5E, after the bottom mold 50c is lowered, the pair of body molds 50a, 50b is closed, and sealed by the pair of body molds 50a, 50b and the bottom mold 50c. A blow mold 50 is formed. Next, air is press-fitted into the preform 10 a and biaxial stretch blow molding is performed on the composite preform 70.

  As a result, the container body 10 is obtained from the preform 10 a in the blow molding die 50. During this time, the body molds 50a and 50b are heated to 30 ° C. to 80 ° C., and the bottom mold 50c is cooled to 5 ° C. to 25 ° C. At this time, in the blow mold 50, the preform 10a of the composite preform 70 and the plastic member 40a are expanded as a unit. Thereby, the preform 10a and the plastic member 40a are integrally formed into a shape corresponding to the inner surface of the blow mold 50. That is, the inner surfaces of the body molds 50a and 50b have a shape in which the concave portions 26 and the convex portions 27 of the container body 10 are transferred. For this reason, the inner surface shape of this body part metal mold | die 50a, 50b is shaped by blow-molding the preform 10a and the plastic member 40a integrally. Thereby, the recessed part 26 and the convex part 27 are formed in the trunk | drum 20 of the container main body 10, respectively, and the plastic member 40 is formed in the trunk | drum 20 of the container main body 10 along the shape of the concave part 26 and the convex part 27. In close contact.

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

  Then, the printing area | region 43 is formed by printing on the outer side of the plastic member 40 expanded by blow molding (FIG.5 (g)). The print region 43 is provided at a position corresponding to the convex portion 27 of the container body 10 in the plastic member 40. Although this printing method is not ask | required, you may use the inkjet method, for example. 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 apparatus) of an ink jet system. At this time, the composite container 10A is previously positioned using a sensor or the like (not shown). The printer 80 stores a print pattern corresponding to the print area 43 in advance. For this reason, the printing pattern and the surface shape of the composite container 10 </ b> A are accurately aligned, and printing is selectively performed on the convex portion 27 of the container body 10.

  In addition, surface treatment such as primer treatment or corona treatment may be performed on the plastic member 40 in advance before printing. 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 performs printing on a composite container. In FIG. 6, the printer 80 includes a head 81 that is mounted with the composite container 10 </ b> A and rotates (rotates and revolves) the composite container 10 </ b> A, and ink sprays that spray ink of each color onto the composite container 10 </ b> A attached to the head 81. Part 82 and an ink curing part 83 for curing the ink adhering to the composite container 10A. In this case, the composite container 10 </ b> A attached to the head 81 is sprayed with ink of each color in the ink spraying part 82 while rotating and revolving. Thereafter, the composite container 10 </ b> A rises in the head 81, and the ink is UV cured, for example, 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 that performs printing on a composite container. In FIG. 7, the printer 80 includes a plurality of wheels 84 and 85 that convey the composite container 10 </ b> A and rotate (rotate and revolve) the composite container 10 </ b> A. The plurality of wheels 84 and 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, the composite container 10 </ b> A is sequentially transported by the ink spraying wheels 84, and ink of each color is sprayed at the ink spraying portion 86 of each ink spraying wheel 84. Thereafter, the composite container 10 </ b> A is conveyed to the ink curing wheel 85, and the ink is UV cured, for example, in the ink curing wheel 85. Thereby, printing is performed on the outside of the plastic member 40.

  In this way, the composite container 10A shown in FIG. 1 is obtained. The timing of printing on the outside of the composite container 10A may be before filling the composite container 10A with the content liquid, or after filling the composite container 10A with the content liquid and sealing with a cap (not shown). Also good.

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. 8 (a) to 8 (g). 8 (a) to 8 (g) has a function in which a plastic member (outer contraction member) 40a contracts with respect to the preform 10a, and the other configuration is shown in FIG. 5 (a). It is substantially the same as the form shown in (g). 8A to 8G, the same portions as those in FIGS. 5A to 5G are denoted by the same reference numerals, and detailed description thereof is omitted.

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

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

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

  In this way, the plastic member (outer contraction member) 40a is heated, so that the plastic member (outer contraction member) 40a is thermally contracted and is in close contact with the outside of the preform 10a (see FIG. 8C). . When the plastic member (outer contraction member) 40a itself has contractibility, the plastic member at the time when the plastic member (outer contraction member) 40a is provided outside the preform 10a (see FIG. 8B). (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. 8D).

  The preform 10a and the plastic member (outer contraction member) 40a are molded using this blow molding die 50, and are substantially the same as the case of FIGS. 5 (a) to (g) described above. A composite container 10A including a plastic member (outer contraction member) 40 provided on the outer surface of the container body 10 is obtained (see FIGS. 8D to 8F). At this time, the blow molding die 50 forms the concave portion 26 and the convex portion 27 in the body portion 20 of the container main body 10, and the plastic member 40 follows the shape of the concave portion 26 and the convex portion 27. 10 torso parts 20 are closely attached. Thereafter, printing is performed on the outside of the expanded plastic member 40 by using the printer 80, thereby forming the print region 43 (FIG. 8G).

  Next, with reference to FIGS. 9A to 9H, another modification of the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment will be described. The modification shown in FIGS. 9A to 9H has an effect that the plastic member (outer contraction member) 40a contracts with respect to the preform 10a, and the preform 10a and the plastic member (outer contraction member) 40a. Is heated in two stages, and the other configuration is substantially the same as the configuration shown in FIGS. 9A to 9H, the same parts as those in FIGS. 5A to 5G are denoted by the same reference numerals, and detailed description thereof is omitted.

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

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

  Next, the preform 10a and the plastic member (outer contraction 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 contraction member) 40a may be, for example, 50 ° C. to 100 ° C.

  By heating the plastic member (outer contraction member) 40a, the plastic member (outer contraction member) 40a is thermally contracted, and is in close contact with the outside of the preform 10a. As a result, a composite preform 70 having the preform 10a and a plastic member (outer contraction member) 40a in close contact with the outside of the preform 10a is obtained (see FIG. 9C).

  In this way, the composite preform 70 is manufactured by preliminarily bringing the plastic member (outer contraction member) 40a into heat contact with the outside of the preform 10a using the first heating device 55, thereby producing the composite preform 70. A series of steps (FIGS. 9 (a) to 9 (c)) and a series of steps (FIGS. 9 (d) to (h)) for producing the composite container 10A by separate molding (factory etc.) ) Can be implemented.

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 9D). At this time, the composite preform 70 is evenly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member (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. 9E). In this case, the heating for shrinking the plastic member (outer contraction member) 40a and the heating for blow-molding the preform 10a can be performed in the same process.

  The composite preform 70 is molded using the blow mold 50, and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the above-described FIGS. A composite container 10A provided with a plastic member (outer contraction member) 40 is obtained (see FIGS. 9E to 9G). At this time, the blow molding die 50 forms the concave portion 26 and the convex portion 27 in the body portion 20 of the container main body 10, and the plastic member 40 follows the shape of the concave portion 26 and the convex portion 27. 10 torso parts 20 are closely attached. Thereafter, printing is performed on the outside of the expanded plastic member 40 by using the printer 80, thereby forming a print region 43 (FIG. 9H).

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

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

  Further, according to the present embodiment, the plastic member 40 is in close contact with the body portion 20 of the container body 10 along the shape of the concave portion 26 and the convex portion 27. For this reason, for example, unlike the case where the composite container 10A is filled with the content liquid and sealed, and then a label is applied, the shape of the concave portion 26 and the convex portion 27 formed in the body portion 20 can be made conspicuous, and the design property A rich composite container 10A can be obtained. Further, unlike the case where a label is applied to the composite container 10 </ b> A, an air layer is not formed between the plastic member 40 and the concave portion 26 of the trunk portion 20. For this reason, the characteristic (gas barrier property etc.) which the plastic member 40 has is not impaired by an air layer.

  Furthermore, according to the present embodiment, the printing region 43 is formed at a position corresponding to the convex portion 27 of the container body 10 in the plastic member 40, and the non-printing region 45 at a position corresponding to the concave portion 26 of the container body 10. Is formed. Thereby, the difference between the convex part 27 and the concave part 26 can be made more conspicuous, and the pattern attached to the body part 20 can be made more conspicuous.

  Furthermore, 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 performed directly on the container main body 10, it may be difficult to recycle the container main body 10.

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

  10 and 11, other configurations are substantially the same as those of the embodiment shown in FIGS. 1 to 9. In the modification shown in FIGS. 10 and 11, the same parts as those in the embodiment shown in FIGS. The configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those in the embodiment shown in FIGS. 10 and 11, the plastic member 40 may have a function of contracting with respect to the preform 10a.

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

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

  A 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, as will be described later. On the other hand, by performing biaxial stretch blow molding, the preform 10a, the inner label member 60a, and the plastic member 40a of the composite preform 70 are integrally expanded.

  Such a composite container 10 </ b> A is provided in close contact with the outer side of the inner label member 60 and the inner label member 60 provided in close contact with the outer side of the container main body 10. The plastic member 40 is provided.

  Among these, the body 20 of the container body 10 is formed with a recess 26 that is recessed radially inward of the container body 10 and a protrusion 27 that protrudes radially outward of the container body 10 from the recess 26.

  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. Yes.

  It is conceivable that at least a part of the plastic member 40 is translucent or transparent. In this case, the inner label member 60 can be visually recognized from the outside through the translucent or transparent portion. The plastic member 40 may be entirely translucent or transparent, or may have an opaque portion and a translucent or transparent portion (for example, a window portion).

  The plastic member 40 is in close contact with the body portion 20 of the container body 10 via the inner label member 60 along the shape of the concave portion 26 and the convex portion 27. On the outside of the plastic member 40, a printing region 43 on which printing has been performed is provided. The print region 43 is provided at a position corresponding to the convex portion 27 of the container body 10 in the plastic member 40.

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

  The inner label member 60 is attached to the outer surface of the container body 10 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. The inner label member 60 is thinly stretched on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 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 except for the recess 26. In addition, the inner label member 60 is in close contact with the body portion 20 of the container body 10 along the shape of the concave portion 26 and the convex portion 27.

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

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

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

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

  For example, the inner label member 60 may be colored so as to have a light barrier property of a specific wavelength, while the plastic member 40a may display character information such as product names 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, it is possible to make the appearance of the composite container 10A rich in variations. Furthermore, a unique design in which the design of the inner label member 60 and the design of the plastic member 40 are superimposed 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 thereof is omitted here.

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

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

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

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

  On the other hand, the plastic member 40a is attached to the outer surface of the inner label member 60a without being bonded, and is in close contact with the preform 10a so that it does not move or rotate, or close enough not to fall by its own weight. Has been.

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

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

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

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

  Next, an inner label member 60a is provided outside the preform 10a, and a plastic member 40a is provided outside the inner label member 60a. Thus, a composite preform 70 having the preform 10a, the inner label member 60a in close contact with the outer side of the preform 10a, and the plastic member 40a in close contact with the outer side of the inner label member 60a is produced (FIG. 15). (See (b)). In this case, the inner label member 60 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

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

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

  In this way, a series of steps for producing the composite preform 70 (FIG. 15 (FIG. 15 (FIG. 15)) is performed by previously bringing the plastic member 40 a into close contact with the outside of the preform 10 a and the inner label member 60 a to produce the composite preform 70. a) to (b)) and a series of steps (FIGS. 15 (d) to (g)) for producing the composite container 10A by blow molding can be carried out at different locations (factories, etc.).

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

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow mold 50. The composite container 10A is molded using this blow molding die 50, and is substantially the same as in the case of the first embodiment described above, and the container body 10 and the inner label member provided on the outer surface of the container body 10. 60 and the composite container 10A provided with the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 15D to 15F). At this time, the blow molding die 50 forms the concave portion 26 and the convex portion 27 in the body portion 20 of the container body 10, and the inner label member 60 and the plastic member 40 are respectively formed between the concave portion 26 and the convex portion 27. It adheres to the body 20 of the container body 10 along the shape. Thereafter, printing is performed on the outside of the expanded plastic member 40 by using the printer 80, thereby forming the print region 43 (FIG. 15G).

  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 thereof is omitted here.

Variations of Blow Molding Method FIGS. 16 (a) to 16 (g) and FIGS. 17 (a) to (h) are diagrams showing variations of the method of manufacturing the composite container 10A (blow molding method) according to the present embodiment. It is. 16 (a) to 16 (g) and FIGS. 17 (a) to 17 (h), the same parts as those in FIGS.

  In the modification shown in FIGS. 16A to 16G, an inner label member 60 is provided outside the preform 10a, and a plastic member (outer shrink member) 40a is provided outside the inner label member 60. In other respects, the configuration is substantially the same as the configuration shown in FIGS.

  In the modification shown in FIGS. 17A to 17H, an inner label member 60 is provided on the outer side of the preform 10a, and a plastic member (outer contraction member) 40a is provided on the outer side of the inner label member 60. In other respects, the configuration is substantially the same as the configuration shown in FIGS.

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. 18 and 19 does not have a body portion and a bottom portion as the inner label member 60a and the plastic member 40a, but uses a cylindrical inner label member 60a and a plastic member 40a. . Other configurations are substantially the same as those of the embodiment shown in FIGS. In the modification shown in FIG. 18 and FIG. 19, the same parts as those in the embodiment shown in FIG. 12 to FIG. The manufacturing method of the composite container 10A and the manufacturing method of the composite preform 70 are also 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 Thread part 17 Flange part 20, 20a Body part 26 Recessed part 27 Convex part 30, 30a Bottom part 31 Recessed part 32 Grounding part 40, 40a Plastic member 41 Body 42 Bottom 43 Printing area 45 Non-printing area 50 Blow mold 60, 60a Inner label member 70 Composite preform

Claims (14)

In composite containers,
A container body made of a plastic material, and having a mouth portion, a trunk portion, and a bottom portion;
A plastic member provided in close contact with the outside of the container body,
The container body and the plastic member are expanded as a unit by blow molding,
The body portion of the container body is formed with a recess recessed inside the container body, and a protrusion protruding outside the container body from the recess, respectively.
The said plastic member is closely_contact | adhered to the said trunk | drum of the said container main body along the shape of the said recessed part and the said convex part, The composite container characterized by the above-mentioned.   The composite container according to claim 1, wherein a printing region formed by printing is provided on a surface of the plastic member.   The printing area is provided at a position corresponding to the convex portion of the container body in the plastic member, and printing is not performed at a position corresponding to the concave portion of the container body. The composite container according to claim 2, wherein a region is formed.   4. The composite container according to claim 2, wherein the printing area is formed by an ink jet method.   5. The composite container according to claim 1, wherein a plurality of the concave portions having the same shape are repeatedly and regularly arranged on the body portion of the container main body.   The composite container according to claim 1, wherein the plastic member is an outer contractive member having a contracting action. An inner label member provided in close contact so as to surround the outside of the container body;
The plastic member is provided in close contact with the outside of the inner label member, and the inner label member is in close contact with the trunk portion of the container body along the shape of the concave portion and the convex portion. The composite container according to any one of claims 1 to 6, wherein: In the manufacturing method of the composite container,
Preparing a preform made of plastic material;
Providing a plastic member on the outside of the preform;
By subjecting the preform and the plastic member to blow molding to expand the preform and the plastic member integrally, a container body having a mouth portion, a trunk portion, and a bottom portion, and the container Producing a composite container having a plastic member provided in close contact with the outside of the main body,
The body portion of the container body is formed with a recess recessed inside the container body, and a protrusion protruding outside the container body from the recess, respectively.
The said plastic member is closely_contact | adhered to the said trunk | drum of the said container main body along the shape of the said recessed part and the said convex part, The manufacturing method of the composite container characterized by the above-mentioned.   9. The method of manufacturing a composite container according to claim 8, further comprising a step of forming a printing region on the surface of the plastic member by printing.   In the step of forming the printing region, the printing region is provided at a position corresponding to the convex portion of the container body, and is printed at a position corresponding to the concave portion of the container body. The method for producing a composite container according to claim 9, wherein a non-printing area not formed is formed.   The method for manufacturing a composite container according to claim 9 or 10, wherein, in the step of forming the printing region, the printing region is formed by an inkjet method.   The composite container manufacturing method according to any one of claims 8 to 11, wherein a plurality of the concave portions having the same shape are repeatedly and regularly arranged in the body portion of the container main body. Method.   The method for manufacturing a composite container according to any one of claims 8 to 12, wherein the plastic member is an outer contractive member having an effect of contracting the preform. A step of providing an inner label member so as to surround the outside of the preform;
The plastic member is provided outside the inner label member, and the inner label member is in close contact with the body portion of the container body along the shape of the concave portion and the convex portion. The method for manufacturing a composite container according to claim 8, wherein the composite container is a composite container.

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