JP2021041709A - Manufacturing method of composite container for beer, composite preform, composite container for beer, inner label member and plastic member - Google Patents

Abstract

To provide a manufacturing method of a composite container for beer, a composite preform, a composite container for beer, an inner label member and a plastic member, capable of preventing a defect of sun smell in beer, even when filled with beer.SOLUTION: A preform 10a made of a plastic material is prepared, and a plastic member 40a is disposed outside the preform 10a. Blow molding is applied to the preform 10a and the plastic member 40a to integrally dilate the preform 10a and the plastic member 40a. At least one of the preform 10a and the plastic member 40a is colored in a visible light color.SELECTED DRAWING: Figure 5

Description

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

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

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

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

Japanese Unexamined Patent Publication No. 2009-241526

Further, conventionally, since it is necessary to make plastic bottles easy to recycle, plastic bottles are required to be colorless and transparent. On the other hand, it is generally known that when beer is filled in a colorless and transparent container and exposed to sunlight, beer has a denatured odor called sunlight odor. For this reason, beer is generally sold by filling it in aluminum cans or colored glass bottles, and it is considered difficult to fill beer in colorless and transparent plastic bottles.

The present invention has been made in consideration of such a point, and is a method for manufacturing a composite container for beer, which can prevent a problem that a sunlight odor is generated in beer even when beer is filled. , Composite preforms, beer composite containers, inner label members and plastic members.

The present invention relates to a step of preparing a preform made of a plastic material, a step of providing a plastic member outside the preform, and the preform and the plastic member in a method for manufacturing a composite container for beer. The preform and the plastic member are integrally expanded by performing blow molding, and at least one of the preform and the plastic member is colored in a visible light color. This is a method for manufacturing a composite container for beer.

The present invention is a method for producing a composite container for beer, wherein the plastic member is colored in a visible light color, and the preform is colorless and transparent.

The present invention is a method for producing a composite container for beer, characterized in that the transmittance of the plastic member with respect to light having a wavelength of 400 nm to 500 nm is 20% or less.

The present invention is a method for producing a composite container for beer, wherein the plastic member is an outer shrinking member having an action of shrinking with respect to the preform.

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

The present invention relates to a method for manufacturing a composite container for beer, a step of preparing a preform made of a plastic material, a step of providing an inner label member on the outside of the preform, and a step of providing an inner label member on the outside of the inner label member. A step of providing the member and a step of integrally expanding the preform, the inner label member, and the plastic member by performing blow molding on the preform, the inner label member, and the plastic member. At least one of the preform, the inner label member, and the plastic member is a method for producing a composite container for beer, which is colored in a visible light color.

The present invention includes a preform made of a plastic material and a plastic member provided so as to surround the outside of the preform in a composite preform for a composite container for beer, and the plastic member is the plastic member. It is a composite preform that is in close contact with the outside of the reform and that at least one of the preform and the plastic member is colored in a visible light color.

The present invention is a composite preform characterized in that the plastic member is colored in a visible light color and the preform is colorless and transparent.

The present invention is a composite preform characterized in that the transmittance of the plastic member with respect to light having a wavelength of 400 nm to 500 nm is 20% or less.

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

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

In the present invention, in a composite preform for a composite container for beer, a preform made of a plastic material, an inner label member provided in close contact so as to surround the outer side of the preform, and the outer side of the inner label member are provided. It comprises a plastic member provided to surround the plastic member, which is in close contact with the outside of the preform and the inner label member and at least the preform, the inner label member and the plastic member. One is a composite preform characterized by being colored in a visible light color.

The present invention includes a container body made of a plastic material and a plastic member provided in close contact with the outside of the container body in a composite container for beer, and the container body and the plastic member are blow-molded. A composite container for beer that is inflated as a unit and that at least one of the container body and the plastic member is colored in a visible light color.

The present invention is a composite container for beer, characterized in that the plastic member is colored in visible light color and the container body is colorless and transparent.

The present invention is a composite container for beer, characterized in that the transmittance of the plastic member with respect to light having a wavelength of 400 nm to 500 nm is 20% or less.

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

The present invention is a composite container for beer, wherein the outer shrinking member shrinks when heat is applied.

According to the present invention, in a composite container for beer, a container body made of a plastic material, an inner label member provided so as to surround the outside of the container body, and an inner label member provided in close contact with the outside of the inner label member are provided. The container body, the inner label member, and the plastic member are integrally expanded by blow molding, and at least one of the container body, the inner label member, and the plastic member. Is a composite container for beer, which is characterized by being colored in a visible light color.

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

The present invention is mounted so as to surround the outside of the preform and is mounted inside the plastic member, and is heated integrally with the preform and the plastic member to obtain the preform and the preform. An inner label member for producing a composite preform having an inner label member adhered to the outside of the inner label member and the plastic member adhered to the outer side of the inner label member. It is an inner label member having a tubular body to cover and being colored in a visible light color.

According to the present invention, it is possible to prevent a problem that a sunlight odor is generated in the beer after the beer composite container is filled with the beer.

FIG. 1 is a partial vertical sectional view showing a composite container according to the first embodiment of the present invention. FIG. 2 is a horizontal sectional view (FIG. II-II sectional view of FIG. 1) showing a composite container according to the first embodiment of the present invention. FIG. 3 is a partial vertical sectional view showing a composite preform according to the first embodiment of the present invention. 4 (a) to 4 (d) are perspective views showing various plastic members. 5 (a) to 5 (f) are schematic views showing a method for manufacturing a composite container according to the first embodiment of the present invention. 6 (a) to 6 (f) are schematic views showing a method of manufacturing a composite container according to a modified example of the first embodiment of the present invention. 7 (a) to 7 (g) are schematic views showing a method of manufacturing a composite container according to a modified example of the first embodiment of the present invention. FIG. 8 is a partial vertical sectional view showing a modified example of the composite container according to the first embodiment of the present invention. FIG. 9 is a partial vertical sectional view showing a modified example of the composite preform according to the first embodiment of the present invention. FIG. 10 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 11 is a horizontal cross-sectional view (XI-XI line cross-sectional view of FIG. 10) showing a composite container according to a second embodiment of the present invention. FIG. 12 is a partial vertical sectional view showing a composite preform according to a second embodiment of the present invention. 13 (a) to 13 (f) are schematic views showing a method for manufacturing a composite container according to a second embodiment of the present invention. 14 (a) to 14 (f) are schematic views showing a method of manufacturing a composite container according to a modified example of the second embodiment of the present invention. 15 (a) to 15 (g) are schematic views showing a method of manufacturing a composite container according to a modified example of the second embodiment of the present invention. FIG. 16 is a partial vertical sectional view showing a modified example of the composite container according to the second embodiment of the present invention. FIG. 17 is a partial vertical sectional view showing a modified example of the composite preform according to the second embodiment of the present invention.

First Embodiment Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. 1 to 9 are diagrams showing the first embodiment of the present invention.

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

The composite container (composite container for beer) 10A shown in FIGS. 1 and 2 is 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. It was obtained by integrally expanding the preform 10a of the composite preform 70 and the plastic member 40a by subjecting the composite preform 70 to biaxial stretch blow molding.

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

Of these, the container body 10 includes a mouth portion 11, a neck portion 13 provided below the mouth portion 11, a shoulder portion 12 provided below the neck portion 13, a body portion 20 provided below the shoulder portion 12, and a body. It is provided with a bottom portion 30 provided below the portion 20.

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

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

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

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

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

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

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

Such a container body 10 can be manufactured by biaxially 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), and PC (polycarbonate) can be used. preferable. The container body 10 may be colored in a color such as red, blue, yellow, green, brown, black, or white, but is preferably colorless and transparent in consideration of ease of recycling. Further, the above-mentioned various resins may be blended and used. Further, a thin-film film such as a diamond-like carbon film or a silicon oxide thin film may be formed on the inner surface of the container body 10 in order to enhance the barrier property of the container.

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

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

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

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

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

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

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

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

Such a plastic member 40 may not have a contracting action on the preform 10a, or may have a shrinking action.

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

By the way, in the present embodiment, at least one of the container body 10 and the plastic member 40 is colored in visible light color. For example, the container body 10 may be colored in a visible light color, and the plastic member 40 may be colored in a predetermined color or colorless and transparent. Alternatively, the plastic member 40 may be colored in a visible light color, and the container body 10 may be colored in a predetermined color or colorless and transparent. Alternatively, both the container body 10 and the plastic member 40 may be colored in visible light color.

This makes it difficult for light having a wavelength of 400 nm to 500 nm to pass through the composite container 10A among the light that enters the composite container 10A from the outside, such as sunlight. As a result, it is possible to prevent the problem that the bitterness component in beer is decomposed by sunlight to produce 3-methyl-2-buten-1-thiol, which is a sunlight odor component.

In particular, the container body 10 may be colorless and transparent, and the plastic member 40 may be transparent in visible light color. Specifically, the transmittance of the plastic member 40 with respect to light having a wavelength of 400 nm to 500 nm is preferably 20% or less. In this case, the problem of sunlight odor being generated in the beer filled in the composite container 10A is prevented, the plastic member 40 is peeled off from the container body 10, and the transparent container body 10 is recycled as in the conventional case. Can be done. When the container body 10 and / or the plastic member 40 is colored in visible light color, it is preferable that 80% or more of the surface area of each is colored, and it is more preferable that the entire surface area of each is colored. In the present embodiment, the visible light color may be various colors, but it is particularly preferable to use a color that does not easily transmit light having a wavelength of 400 nm to 500 nm. Specifically, the visible light color is preferably a color such as brown or orange.

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

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

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

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

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

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

Such a plastic member 40a may not have an action of contracting with respect to the preform 10a, or may have an action of contracting.

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

In the latter case, that is, when the plastic member (outer shrinking member) 40a has an action of contracting, the plastic member (outer shrinking member) 40a is, for example, when an external action (for example, heat) is applied. Those that shrink (for example, heat shrink) with respect to the reform 10a may be used. Alternatively, the plastic member (outer shrinking member) 40a may itself have shrinkage or elasticity and can shrink without applying an external action.

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

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

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

Further, the plastic member 40a may be made of a material having a light ray barrier property such as ultraviolet rays. In this case, without using a multi-layer preform or a preform containing a blend material as the preform 10a, it is possible to enhance the light barrier property of the composite container 10A and prevent the beer, which is the content liquid, from being deteriorated by ultraviolet rays or the like. it can. For example, the plastic member 40a may be provided over the entire area of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container main body 10 to enhance the ultraviolet barrier property of this portion. As such a material, a blended material or a material obtained by adding a light-shielding resin to PET, PE, or PP can be considered. Further, a foaming member having a foam cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, may be used.

Further, the plastic member 40a may be made of a material having a higher cold insulation 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 beer, which is the content liquid, to be transmitted to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. As a result, the cold insulation property of the composite container 10A is enhanced. For example, the plastic member 40 may be provided on all or part of the body 20 of the container body 10 to improve the cold 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. As such a material, foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin and the like can be considered. Further, a foaming member having a foam cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, may be used.

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

The plastic member 40a may be pre-printed with a design or printing. In this case, the printing may be formed by designing or printing the plain plastic member 40a by a printing method such as an inkjet method or a gravure printing method. This printing may be applied to the plastic member 40a before being attached to the preform 10a, or may be applied with the plastic member 40a provided on the outside of the preform 10a. Further, the plastic member 40a may be colored in a color such as red, blue, yellow, green, brown, black, or white, and may be transparent or opaque.

In the present embodiment, at least one of the preform 10a and the plastic member 40a is colored in visible light color. For example, the preform 10a may be colored in a visible light color, and the plastic member 40a may be colored in a predetermined color or may be colorless and transparent. Alternatively, for example, the plastic member 40a may be colored in a visible light color, and the preform 10a may be colored in a predetermined color or colorless and transparent. Alternatively, both the preform 10a and the plastic member 40a may be colored in a visible light color. As a result, the composite container 10A produced by blow molding has a structure that does not easily transmit light having a wavelength of 400 nm to 500 nm, so that the problem that the beer has a sunlight odor is prevented. When the preform 10a and / or the plastic member 40a is colored in visible light color, a visible light color pigment may be added to the molding material in the step of producing these by injection molding or the like.

In particular, the preform 10a may be colorless and transparent, and the plastic member 40a may be transparent in visible light color. Specifically, the transmittance of the plastic member 40 with respect to light having a wavelength of 400 nm to 500 nm is preferably 20% or less. In this case, after filling the blow-molded composite container 10A with beer, it is possible to prevent the beer from generating a sunlight odor, and the transparent container body 10 can be recycled.

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

As shown in FIGS. 3 and 4A, the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. You may. In this case, since the bottom 42 of the plastic member 40a covers the bottom 30a of the preform 10a, in addition to the body 20 of the composite container 10A, the bottom 30 also has various barrier properties against light rays having a wavelength of 400 nm to 500 nm. Functions and characteristics can be added. Examples of such a plastic member 40a include the blow tube and the sheet forming tube described above.

Further, as shown in FIGS. 9 (described later) and 4 (b), the plastic member 40a has a circular tube shape (bottomless cylindrical shape) as a whole, and even if it has a cylindrical body portion 41. good. In this case, as the plastic member 40a, for example, the blow tube, extrusion tube, inflation molding tube, and sheet molding tube described above can be used.

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

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

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

Next, the plastic member 40a is prepared. In this case, the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. At least one of the preform 10a and the plastic member 40a is pre-colored in visible light color.

Next, by providing the plastic member 40a on the outside of the preform 10a, a composite preform 70 having the preform 10a and the plastic member 40a in close contact with the outside of the preform 10a is produced (FIG. 5 (FIG. 5). b) See).

In this case, a plastic member 40a having an inner diameter equal to or slightly smaller than the outer diameter of the preform 10a may be pushed into the preform 10a so as to be brought into close contact with the outer surface of the preform 10a. Alternatively, as will be described later, a heat-shrinkable plastic member 40a is provided on the outer surface of the preform 10a, and the plastic member 40a is heat-shrinked by heating to 50 ° C. to 100 ° C. to shrink the outer surface of the preform 10a. It may be in close contact with.

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

Next, the composite preform 70 is heated by the heating device 51 (see FIG. 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 portion 11a facing downward. The heating temperature of the preform 10a and the plastic member 40a in this heating step may be, for example, 90 ° C to 130 ° C.

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

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

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

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

In this way, the 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. In this case, at least one of the container body 10 and the plastic member 40 after blow molding is colored in visible light color.

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

Subsequently, the composite container 10A is filled with beer, which is the content liquid, and the mouth portion 11 is sealed with a cap (not shown). After that, the composite container 10A filled with beer is shipped and stored in a store, a warehouse, or the like.

During such storage, the beer-filled composite container 10A may be directly or indirectly irradiated with light such as sunlight. On the other hand, in the present embodiment, at least one of the blow-molded container body 10 and the plastic member 40 is colored in visible light color. Therefore, in particular, the transmission of light having a wavelength of 400 nm to 500 nm to the composite container 10A is suppressed. As a result, it is possible to prevent the bitterness component in the beer from being decomposed by sunlight to generate a sunlight odor in the beer.

Modification Example of Manufacturing Method of Composite Container for Beer Next, a modification of the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment will be described with reference to FIGS. 6A to 6F. In the modified examples shown in FIGS. 6 (a) to 6 (g), the plastic member (outer contracting member) 40a has an action of contracting with respect to the preform 10a, and the other configurations are shown in FIG. 5 (a). It is substantially the same as the form shown in (f). In FIGS. 6A to 6F, the same parts as those in FIGS. 5A to 5F are designated by the same reference numerals, and detailed description thereof will be omitted.

First, a preform 10a made of a plastic material is prepared (see FIG. 6A).

Next, a plastic member (outer contraction member) 40a is provided on the outside of the preform 10a (see FIG. 6B). In this case, the plastic member (outer contracting member) 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member (outer contracting member) 40a is mounted so as to cover the entire body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire bottom portion 30a.

Next, the preform 10a and the plastic member (outer contraction member) 40a are heated by the heating device 51 (see FIG. 6C). At this time, the preform 10a and the plastic member (outer contraction member) 40a are uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member (outer shrinking member) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

When the plastic member (outer shrinking member) 40a is heated in this way, the plastic member (outer shrinking member) 40a is thermally shrunk and comes into close contact with the outside of the preform 10a (see FIG. 6C). .. When the plastic member (outer shrinking member) 40a itself has shrinkage, the plastic member is provided at the time when the plastic member (outer shrinking member) 40a is provided on the outside of the preform 10a (see FIG. 6B). The (outer shrinking member) 40a may be in close contact with the outside of the preform 10a.

Subsequently, the preform 10a and the plastic member (outer shrinking member) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 6D). In this case, heating for heat-shrinking the plastic member (outer shrinking member) 40a and heating for blow-molding the preform 10a can be performed in the same process.

The preform 10a and the plastic member (outer shrinking member) 40a are molded using the blow molding die 50, and together with the container body 10 in substantially the same manner as in the cases of FIGS. 5A to 5F described above. , A composite container 10A provided with a plastic member (outer contraction member) 40 provided on the outer surface of the container body 10 can be obtained (see FIGS. 6 (d) to 6 (f)).

Next, another modification of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to FIGS. 7 (a) to 7 (g). In the modified examples shown in FIGS. 7 (a) to 7 (g), the plastic member (outer contraction member) 40a has an action of contracting with respect to the preform 10a, and the preform 10a and the plastic member (outer contraction member) 40a Is heated in two stages, and other configurations are substantially the same as the forms shown in FIGS. 5 (a) to 5 (f). In FIGS. 7 (a) to 7 (g), the same parts as those in FIGS. 5 (a) to 5 (f) are designated by the same reference numerals, and detailed description thereof will be omitted.

First, a preform 10a made of a plastic material is prepared (see FIG. 7A).

Next, a plastic member (outer contraction member) 40a is provided on the outside of the preform 10a (see FIG. 7B).

Next, the preform 10a and the plastic member (outer shrinking member) 40a are heated by the first heating device 55 (see FIG. 7C). 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.

When the plastic member (outer shrinking member) 40a is heated, the plastic member (outer shrinking member) 40a is heat-shrinked and comes into 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 shrinking member) 40a in close contact with the outside of the preform 10a can be obtained (see FIG. 7C).

In this way, the composite preform 70 is produced by heat-adhering the plastic member (outer contraction member) 40a to the outside of the preform 10a in advance using the first heating device 55 to prepare the composite preform 70. A series of steps (FIGS. 7 (a) to (c)) for producing the composite container 10A and a series of steps (FIGS. 7 (d) to (g)) for producing the composite container 10A by blow molding are performed at different locations (factory, etc.). ) Will be possible.

Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 7D). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member (outer shrinking member) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 7E).

The composite preform 70 is molded using the blow molding die 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 cases of FIGS. 5A to 5F described above. A composite container 10A provided with a plastic member (outer contraction member) 40 is obtained (see FIGS. 7 (e) to 7 (g)).

As described above, according to the present embodiment, at least one of the container body 10 and the plastic member 40 is colored in visible light color. As a result, it is possible to prevent a problem that the beer has a sunlight odor after the composite container 10A is filled with beer.

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

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

Modification Example of Composite Container and Composite Preform Next, a modification of the present embodiment will be described with reference to FIGS. 8 and 9.

The modified examples shown in FIGS. 8 and 9 do not have a body and a bottom as the plastic member 40a, but use a cylindrical plastic member 40a.

In the composite container 10A shown in FIG. 8, the plastic member 40 extends from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but does not reach the bottom portion 30. Further, in the composite preform 70 shown in FIG. 9, the plastic member 40a is in close contact so as to cover only the body portion 20a of the preform 10a, and more specifically, the neck portion 13 of the container body 10 of the body portion 20a. It covers the area excluding the portion 13a corresponding to the portion 13a and the portion corresponding to the lower portion of the body portion 20a. At least one of the container body 10 (preform 10a) and the plastic member 40 (plastic member 40a) is colored in visible light color.

In FIGS. 8 and 9, other configurations are substantially the same as the embodiments shown in FIGS. 1 to 7. In the modified examples shown in FIGS. 8 and 9, the same parts as those of the embodiments shown in FIGS. 1 to 7 are designated by the same reference numerals, and detailed description thereof will be omitted. Further, since the configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiments shown in FIGS. 1 to 7, detailed description thereof will be omitted. Further, in FIGS. 8 and 9, those having a function of contracting the plastic member 40 with respect to the preform 10a may be used.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 10 to 17. 10 to 17 are views showing a second embodiment of the present invention. In FIGS. 10 to 17, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

First, the outline of the composite container according to the present embodiment will be described with reference to FIGS. 10 and 11.

As will be described later, the composite container 10A shown in FIGS. 10 and 11 is formed into a composite preform 70 (see FIG. 12) including a preform 10a, an inner label member 60a, and a plastic member 40a by using a blow molding die 50. On the other hand, it is obtained by integrally expanding the preform 10a, the inner label member 60a, and the plastic member 40a of the composite preform 70 by performing biaxial stretch blow molding.

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

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

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

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

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

The inner label member 60 is attached to the outer surface of the container body 10 without being adhered, and is in close contact with the container body 10 so as not to move or rotate. The inner label member 60 is thinly stretched on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 11, the inner label member 60 is provided over the entire circumferential direction so as to surround the container body 10, and has a substantially circular horizontal cross section.

In this case, the inner label member 60 is provided so as to cover the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10, excluding the mouth portion 11 and the neck portion 13. As a result, desired characters, images, and the like can be added to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10, and the composite container 10A can be decorated and information can be displayed.

The inner label member 60 may be provided in the entire area or a part of the container body 10 other than the mouth portion 11. For example, the inner label member 60 may be provided so as to cover the entire neck portion 13, shoulder portion 12, body portion 20, and bottom portion 30 of the container body 10 except for the mouth portion 11. Further, the number of inner label members 60 is not limited to one, and a plurality of inner label members 60 may be provided. The inner label member 60 may be provided in the same area as the plastic member 40, or may be provided in a narrower area than the plastic member 40. In the latter case, 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 when attached to the container body 10.

By the way, in the present embodiment, at least one of the container body 10, the inner label member 60, and the plastic member 40 is colored in visible light color.

When the inner label member 60 is colored in a visible light color, the transmittance of the inner label member 60 with respect to light having a wavelength of 400 nm to 500 nm is preferably 20% or less. Further, it is preferable to make the container body 10 colorless and transparent. In this case, the problem of sunlight odor being generated in the beer filled in the composite container 10A is prevented, and the inner label member 60 and the plastic member 40 are peeled off from the container body 10 to recycle the transparent container body 10. be able to. When the inner label member 60 is colored in a visible light color, it is preferable that 80% or more of the surface area is colored, and it is more preferable to color the entire surface area.

Further, while the inner label member 60 is colored in a visible light color, the plastic member 40a may display character information such as a beer name, a manufacturer, and a raw material name in addition to a design and a product name. In this case, a single type of inner label member 60 may be used, and the design of the plastic member 40 may be different depending on the type of beer, the manufacturer, the sales destination, and the like.

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

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

As shown in FIG. 12, the composite preform 70 includes a preform 10a made of a plastic material, a bottomed cylindrical inner label member 60a provided in close contact with the outer side of the preform 10a, and an inner label member 60a. It is provided with a bottomed cylindrical plastic member 40a provided in close contact with the outside.

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

The inner label member 60a may be pre-designed or printed. For example, in addition to the design, the product name, and the like, character information such as the name of the beer as the content liquid, the manufacturer, and the name of the raw material may be described. In this case, it is possible to display an image or characters on the composite container 10A without separately attaching a label or the like to the container body 10 after blow molding. For example, the inner label member 60a may be provided on all or part of the body portion 20a of the preform 10a so that an image or characters can be displayed on the body portion 20 of the container body 10 after molding. This eliminates the need for a step of attaching a label using a labeler after sealing the container, so that the manufacturing cost can be suppressed and the yield can be prevented from being lowered.

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

On the other hand, the plastic member 40a is attached to the outer surface of the inner label member 60a without being adhered to the preform 10a so as not to move or rotate, or to the extent that it does not fall due to its own weight. Has been done.

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

Further, at least one of the preform 10a, the inner label member 60a, and the plastic member 40a is colored in visible light color. When the inner label member 60a is colored in a visible light color, the transmittance of the inner label member 60a with respect to light having a wavelength of 400 nm to 500 nm is preferably 20% or less.

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

Next, the manufacturing method (blow molding method) of the composite container 10A according to the present embodiment will be described with reference to FIGS. 13 (a) to 13 (f).

First, a preform 10a made of a plastic material is prepared (see FIG. 13A).

Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member 40a is provided on the outer side of the inner label member 60a. As a result, a composite preform 70 having the preform 10a, the inner label member 60a adhered to the outer side of the preform 10a, and the plastic member 40a adhered to the outer side of the inner label member 60a is produced (FIG. 13). See (b)). In this case, the inner label member 60a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

At this time, even if the inner label member 60a and the plastic member 40a having the same or slightly smaller inner diameter as the outer diameter of the preform 10a are pushed against the preform 10a, they are brought into close contact with the outer surface of the preform 10a. good. Alternatively, a heat-shrinkable inner label member 60a and a plastic member 40a are provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a are heat-shrinked by heating to 50 ° C. to 100 ° C. It may be brought into close contact with the outer surface of the preform 10a.

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

In this way, a series of steps for producing the composite preform 70 by bringing the plastic member 40a into close contact with the outside of the preform 10a and the inner label member 60a in advance to prepare the composite preform 70 (FIG. 13 (FIG. 13). It becomes possible to carry out a series of steps (FIGS. 13 (d) to (f)) for producing the composite container 10A by blow molding at different places (factory or the like).

Next, the composite preform 70 is heated by the heating device 51 (see FIG. 13C).

Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow molding die 50. The composite container 10A is molded using the blow molding die 50, and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the case of the first embodiment described above. A composite container 10A including the 60 and a plastic member 40 provided on the outside of the inner label member 60 is obtained (see FIGS. 13 (d)-(f)).

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

Modification Examples of the Blow Molding Method FIGS. 14 (a) to 14 (f) and FIGS. 15 (a) to 15 (g) are diagrams showing modifications of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment, respectively. Is. In FIGS. 14 (a) to 14 (f) and FIGS. 15 (a) to 15 (g), the same parts as those in FIGS. 1 to 13 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the modification shown in FIGS. 14 (a) to 14 (f), the inner label member 60 is provided on the outer side of the preform 10a, and the plastic member (outer shrinkage member) 40a is provided on the outer side of the inner label member 60. The other configurations are substantially the same as the forms shown in FIGS. 6 (a) to 6 (f).

In the modification shown in FIGS. 15 (a) to 15 (g), the inner label member 60 is provided on the outer side of the preform 10a, and the plastic member (outer shrinkage member) 40a is provided on the outer side of the inner label member 60. The other configurations are substantially the same as the forms shown in FIGS. 7 (a) to 7 (g).

Modification Example of Composite Container and Composite Preform Next, a modification of the present embodiment will be described with reference to FIGS. 16 and 17.

The modified examples shown in FIGS. 16 and 17 do not have a body and a bottom as the inner label member 60a and the plastic member 40a, but use the cylindrical inner label member 60a and the plastic member 40a. .. Other configurations are substantially the same as those of the embodiments shown in FIGS. 10 to 13. In the modified examples shown in FIGS. 16 and 17, the same parts as those of the embodiments shown in FIGS. 10 to 13 are designated by the same reference numerals, and detailed description thereof will be omitted. Further, the method for producing the composite container 10A and the method for manufacturing the composite preform 70 are substantially the same as those of the embodiments shown in FIGS. 10 to 13, so detailed description thereof will be omitted.

10 Container body 10A Composite container 10a Preform 11, 11a Mouth 12 Shoulder 13 Neck 14 Thread 17 Flange 20, 20a Body 30, 30a Bottom 40, 40a Plastic member 41 Body 42 Bottom 50 Blow molding die 60, 60a Inner label member 61 Body 62 Bottom 70 Composite preform

Claims (1)

In the method of manufacturing a composite container for beer
The process of preparing a preform made of plastic material and
A step of providing a heat-shrinkable plastic member on the outside of the preform, and
A step of expanding the preform and the plastic member as a unit by performing blow molding on the preform and the plastic member is provided.
A method for producing a composite container for beer, wherein at least one of the preform and the plastic member is colored in a visible light color.

Images