JP7221263B2 - Method for manufacturing composite container for beer, composite preform, composite container for beer, inner label member and plastic member - Google Patents

Description

TECHNICAL FIELD 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.

2. Description of the Related Art In recent years, plastic bottles have become popular as bottles for containing liquids such as food and drink, and liquids are contained in such plastic bottles.

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

By the way, in the conventional biaxial stretch blow molding method, for example, a preform containing a single-layer material such as PET or PP, a multi-layer material, or a blend material is used to form a container shape. However, in conventional biaxial stretch blow molding processes, it is common to simply mold the preform into a container shape. Therefore, when various functions and properties (barrier properties, heat retention, etc.) are to be imparted to the container, the means for doing so are limited, for example, by changing the material constituting the preform.

JP 2009-241526 A

In addition, conventionally, plastic bottles are required to be colorless and transparent because it is necessary to facilitate recycling of plastic bottles. On the other hand, it is generally known that when beer is filled in a colorless and transparent container and exposed to sunlight, beer generates a denatured odor called sunlight odor. For this reason, beer is generally sold 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 these points, and is a method for manufacturing a composite container for beer that can prevent the problem of sunlight smelling beer even when filled with beer. , a composite preform, a composite beer container, an inner label member and a plastic member.

The present invention provides a method for manufacturing a composite container for beer, comprising the steps of preparing a preform made of a plastic material, providing a plastic member outside the preform, and removing the preform and the plastic member. and expanding the preform and the plastic member integrally by applying blow molding to the preform, wherein at least one of the preform and the plastic member is colored in a visible light color. It is a method for manufacturing a composite container for beer.

The present invention is a method of manufacturing a composite beer container, 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, wherein the plastic member has a transmittance of 20% or less for light with a wavelength of 400 nm to 500 nm.

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

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

The present invention provides a method for manufacturing a composite container for beer, comprising the steps of preparing a preform made of a plastic material, providing an inner label member on the outside of the preform, and placing an inner label member on the outside of the inner label member. providing a member; and subjecting the preform, the inner label member, and the plastic member to blow molding to expand the preform, the inner label member, and the plastic member as one. At least one of the preform, the inner label member and the plastic member is colored in a visible light color.

The present invention provides a composite preform for a composite container for beer, comprising a preform made of a plastic material and a plastic member provided so as to surround the outside of the preform, wherein the plastic member comprises the plastic member. The composite preform is closely attached to the outside of the preform, and at least one of the preform and the plastic member is colored in a visible light color.

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

The present invention is a composite preform, wherein the plastic member has a transmittance of 20% or less for light with a wavelength of 400 nm to 500 nm.

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

The present invention is a composite preform, wherein the outer shrinkable member shrinks with respect to the preform when heat is applied.

The present invention provides a composite preform for a composite container for beer, comprising 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 an outer side of the inner label member. and a plastic member provided so as to surround the plastic member, the plastic member being in close contact with the outer sides 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 provides a composite container for beer comprising a container body made of a plastic material and a plastic member provided in close contact with the outside of the container body, wherein the container body and the plastic member are formed by blow molding. The composite container for beer is characterized in that it is inflated integrally, and 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, wherein the plastic member is colored in a visible light color, and the container body is colorless and transparent.

The present invention is a composite container for beer, wherein the plastic member has a transmittance of 20% or less for light with a wavelength of 400 nm to 500 nm.

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

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

The present invention provides a composite container for beer, comprising a container body made of a plastic material, an inner label member provided in close contact so as to surround the outside of the container body, and a label member provided in close contact with the outside of the inner label member. 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 characterized by being colored in a visible light color.

The present invention relates to a composite preform having the preform and a plastic member adhered to the outside of the preform by being mounted so as to surround the outside of the preform and being integrally heated together with the preform. The plastic member has a cylindrical body covering at least the body of the preform and is colored in a visible light color.

The present invention is mounted so as to surround the outside of a preform, is mounted inside a plastic member, and is integrally heated together with the preform and the plastic member to obtain the preform and the preform. and the plastic member adhered to the outside of the inner label member, wherein the body of the preform is An inner label member characterized by having a covering cylindrical body and being colored in a visible light color.

ADVANTAGE OF THE INVENTION According to this invention, after the composite container for beer is filled with beer, the problem that a sunlight smell will generate|occur|produce to beer can be prevented.

1 is a partial vertical sectional view showing a composite container according to a first embodiment of the present invention; FIG. FIG. 2 is a horizontal cross-sectional view (cross-sectional view taken along the line II-II in FIG. 1) showing the composite container according to the first embodiment of the present invention; 3 is a partial vertical sectional view showing a composite preform according to a first embodiment of the invention; FIG. 4(a) to (d) are perspective views showing various plastic members. 5(a) to 5(f) are schematic diagrams showing a method of manufacturing a composite container according to the first embodiment of the present invention; FIG. 6(a) to 6(f) are schematic diagrams showing a method of manufacturing a composite container according to a modification of the first embodiment of the present invention; FIG. 7A to 7G are schematic diagrams showing a method of manufacturing a composite container according to a modification of the first embodiment of the present invention; FIG. 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 cross-sectional view showing a composite container according to a second embodiment of the present invention; 11 is a horizontal cross-sectional view (cross-sectional view along line XI-XI in 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 invention; 13(a) to 13(f) are schematic diagrams showing a method of manufacturing a composite container according to a second embodiment of the present invention; FIG. 14(a) to 14(f) are schematic diagrams showing a method of manufacturing a composite container according to a modification of the second embodiment of the present invention; FIG. 15(a) to 15(g) are schematic diagrams showing a method of manufacturing a composite container according to a modification of the second embodiment of the present invention; FIG. 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 modification of the composite preform according to the second embodiment of the present invention;

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

First, with reference to FIGS. 1 and 2, an outline of a composite container manufactured by a composite container manufacturing method (blow molding method) according to the present embodiment will be described. In this specification, the terms "upper" and "lower" respectively refer to the upper and lower sides when the composite container 10A is erected (FIG. 1).

The composite container (composite container for beer) 10A shown in FIGS. 1 and 2 is produced by molding a composite preform 70 (see FIG. 3) including the preform 10a and the plastic member 40a using a blow molding die 50, as described later. It is obtained by expanding the preform 10a of the composite preform 70 and the plastic member 40a integrally by subjecting the composite preform 70 to biaxial stretch blow molding.

Such a composite container 10A comprises an inner container body 10 made of a plastic material 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 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 closely attached to the outer surface of the container body 10 in a thinly stretched state, and is attached to the container body 10 in a state in which it cannot be easily moved or rotated.

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

Of these, the mouth portion 11 has a threaded portion 14 to be screwed onto a cap (not shown) and a flange portion 17 provided below the threaded portion 14 . In addition, 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 with a substantially uniform diameter. The shoulder portion 12 is positioned between the neck portion 13 and the body portion 20 and has a shape whose diameter gradually increases from the neck portion 13 side toward the body portion 20 side.

Furthermore, the trunk portion 20 has a cylindrical shape with a substantially uniform diameter as a whole. However, the shape is not limited to this, and the trunk portion 20 may have a polygonal tubular shape such as a quadrangular tubular shape or an octagonal tubular shape. Alternatively, the body 20 may have a cylindrical shape with a non-uniform horizontal cross-section from top to bottom. Moreover, in the present embodiment, the trunk portion 20 has no irregularities and has a substantially flat surface, but the surface is not limited to this. For example, the body portion 20 may be formed with unevenness such as panels or grooves.

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

The thickness of the container body 10 at the trunk portion 20 is not limited to this, but can be made as thin as about 50 μm to 250 μm, for example. Furthermore, 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 produced by biaxially stretching blow molding a preform 10a (described later) produced by injection molding a synthetic resin material. As the material of the preform 10a, that is, the container body 10, thermoplastic resins, 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 red, blue, yellow, green, brown, black, white, or the like, 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 deposited film such as a diamond-like carbon film or a silicon oxide thin film may be formed on the inner surface of the container body 10 in order to improve the barrier properties of the container.

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

In addition, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foamed preform having a foamed cell diameter of 0.5 to 100 μm is formed, and this foamed preform is blow-molded. Thus, the container body 10 may be produced. Since such a container body 10 incorporates foam cells, the light shielding property of the entire container body 10 can be enhanced.

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

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 will be described later, and is obtained by closely contacting the outside of the preform 10a and then biaxially stretch blow molding 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 , body portion 20 and bottom portion 30 of the container body 10 excluding the mouth portion 11 and neck portion 13 . Thereby, desired functions and characteristics can be imparted to the shoulder portion 12, the body portion 20 and the bottom portion 30 of the container body 10. FIG.

In addition, the plastic member 40 may be provided in the entire area or a partial area of the container body 10 other than the mouth portion 11 . For example, the plastic member 40 may be provided so as to entirely cover the neck portion 13 , the shoulder portion 12 , the body portion 20 and the bottom portion 30 of the container body 10 excluding the mouth portion 11 . Furthermore, the number of plastic members 40 is not limited to one, and a plurality of members may be provided. For example, two plastic members 40 may be provided on the outer surface of shoulder 12 and the outer surface of bottom 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 a cutting line (not shown) may be provided on the plastic member 40 in advance, and the plastic member 40 may be peeled off along the cutting line. can. Thereby, the plastic member 40 can be separated and removed from the container body 10 .

Such a plastic member 40 may be one that does not have a contracting action with respect to the preform 10a, or one that has a contracting 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 this embodiment, at least one of the container main body 10 and the plastic member 40 is colored in a 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 may be 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 may be colorless and transparent. Alternatively, both the container body 10 and the plastic member 40 may be colored in visible light.

This makes it difficult for light with a wavelength of 400 nm to 500 nm, out of light such as sunlight entering the composite container 10A from the outside, to pass through the composite container 10A. 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-butene-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 to visible light. Specifically, it is preferable that the transmittance of the plastic member 40 for light with a wavelength of 400 nm to 500 nm is 20% or less. In this case, the beer filled in the composite container 10A can be prevented from having a sunlight odor, and the plastic member 40 can be peeled off from the container body 10 and the transparent container body 10 can be recycled in the same manner as before. can be done. When the container body 10 and/or the plastic member 40 are colored in visible light, it is preferable that 80% or more of the surface area of each is colored, and it is more preferable that the entirety 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 hardly transmits light with 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 this embodiment will be described with reference to FIG.

As shown in FIG. 3, the composite preform 70 includes a plastic material preform 10a and a bottomed cylindrical plastic member 40a provided outside 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 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 . The trunk portion 20a corresponds to the neck portion 13, the shoulder portion 12 and the trunk 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 glued, and is in such close contact with the preform 10a that it does not move or rotate, or in such close contact that it does not fall under its own weight. . The plastic member 40a surrounds the preform 10a over its entire circumferential direction 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.

In addition, 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 entirely cover the neck portion 13a, body portion 20a and 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 members may be provided. For example, two plastic members 40a may be provided at two locations on the outer side of the body portion 20a.

Such a plastic member 40a may be one that does not contract with respect to the preform 10a, or one that contracts.

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

In the latter case, i.e., when the plastic member (outer shrinkable member) 40a has a shrinking action, the plastic member (outer shrinkable member) 40a is, for example, deformed when an external action (eg, heat) is applied. A material that shrinks (for example, heat shrinks) with respect to the reform 10a may be used. Alternatively, the plastic member (outer shrinkable member) 40a itself may be shrinkable or elastic, and may be shrinkable without external action.

Examples of the plastic member 40a include polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluorine resin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, Ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluororubber, nylon 6, nylon 6,6, nylon MXD6, aromatic polyamide, polycarbonate, ethylene polyethylene terephthalate, butylene terephthalate, ethylene polynaphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyether ketone, polyether ether ketone, unsaturated polyester, alkyd resin, polyimide, polysulfone, polyphenylene sulfide, polyether sulfone, silicone resin, polyurethane, phenolic resin, urea resin, polyethylene oxide , polypropylene oxide, polyacetal, epoxy resin, and the like. Of these, it is preferable to use thermoplastic non-elastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). A blend material, a multilayer structure, or a partially multilayer structure may also be used. In addition to the main component resin, various additives may be added to the material of the plastic member 40a as long as the characteristics of the plastic member 40a are not impaired. Additives include, for example, plasticizers, ultraviolet stabilizers, anti-coloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, thread friction reducing agents, slip agents, release agents, anti- Oxidizing agents, ion exchange agents, color pigments, and the like can be added. In addition, by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, a foamed member having a foamed cell diameter of 0.5 to 100 μm is used, and this foamed preform is molded. , the light shielding property can be enhanced.

Also, the plastic member 40a may be made of the same material as the container body 10 (preform 10a). In this case, it is possible to selectively increase the strength of the portion of the composite container 10A, for example, by placing the plastic member 40 intensively in the portion where the strength is desired to be increased. For example, a plastic member 40 may be provided around the shoulder portion 12 and around the bottom portion 30 of the container body 10 to increase the strength of these portions. Examples of such materials 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 gas barrier properties such as oxygen barrier properties or water vapor barrier properties. In this case, the gas barrier properties of the composite container 10A can be improved without using a multi-layered preform or a preform containing a blend material as the preform 10a, thereby preventing deterioration of the beer, which is the liquid content, due to oxygen or water vapor. can. For example, the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container body 10 may be provided with plastic members 40 to enhance the gas barrier properties of these portions. Such materials include PE (polyethylene), PP (polypropylene), MXD-6 (nylon), PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer), or oxygen It is also conceivable to mix absorbent materials.

Further, the plastic member 40a may be made of a material having light barrier properties such as ultraviolet rays. In this case, it is possible to improve the light barrier property of the composite container 10A without using a multi-layered preform or a preform containing a blend material as the preform 10a, thereby preventing deterioration of beer, which is the liquid content, due to ultraviolet rays or the like. can. For example, the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container body 10 may be provided with a plastic member 40a in order to enhance the UV barrier properties of these portions. Such a material may be a blend material or a material obtained by adding a light-shielding resin to PET, PE, or PP. Also, a foamed member having a foamed cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, may be used.

Further, the plastic member 40a may be made of a material having a higher cold insulating property (a material having a lower thermal conductivity) than the plastic material forming the container body 10 (preform 10a).
In this case, it is possible to make it difficult for the temperature of the 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. Thereby, the cold insulating property of the composite container 10A is enhanced. For example, the body 20 of the container body 10 may be entirely or partially provided with a plastic member 40 to improve the cold insulation of the body 20 . Moreover, when the user grips the composite container 10A, it is possible to prevent the composite container 10A from being difficult to hold due to being too cold. Such materials include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. Also, a foamed member having a foamed cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, may be used.

Further, the plastic member 40a may be made of a material that is less slippery than the plastic material that constitutes the container body 10 (preform 10a). In this case, the composite container 10A can be easily gripped by the user without changing the material of the container body 10 . For example, the body 20 of the container body 10 may be entirely or partially provided with a plastic member 40 to make the body 20 easier to hold.

The plastic member 40a may be previously printed with a design or print. In this case, printing may be performed by applying a design or printing to 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 while the plastic member 40a is provided outside the preform 10a. Moreover, the plastic member 40a may be colored in red, blue, yellow, green, brown, black, white, or the like, and may be transparent or opaque.

In this embodiment, at least one of the preform 10a and the plastic member 40a is colored in visible light. 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 may be colorless and transparent. Alternatively, both the preform 10a and the plastic member 40a may be colored in visible light. As a result, the composite container 10A manufactured by blow molding has a structure that makes it difficult for light with a wavelength of 400 nm to 500 nm to pass through, thus preventing the problem of sunlight smelling beer. When coloring the preform 10a and/or the plastic member 40a in a visible light color, a visible light pigment may be added to the molding material in the process of manufacturing 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 to visible light. Specifically, it is preferable that the transmittance of the plastic member 40 for light with a wavelength of 400 nm to 500 nm is 20% or less. In this case, after the blow-molded composite container 10A is filled 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 4(a), the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical trunk portion 41 and a bottom portion 42 connected to the trunk portion 41. can be In this case, since the bottom portion 42 of the plastic member 40a covers the bottom portion 30a of the preform 10a, in addition to the body portion 20 of the composite container 10A, the bottom portion 30 also has various properties such as barrier properties against light rays with wavelengths of 400 nm to 500 nm. Functions and characteristics can be given. Examples of such a plastic member 40a include the above-described blow tube and sheet molding tube.

As shown in FIGS. 9 (described later) and FIG. 4(b), the plastic member 40a has a circular tubular shape (bottomless cylindrical shape) as a whole and has a cylindrical body portion 41. good. In this case, as the plastic member 40a, for example, the above-described blow tube, extruded tube, inflation-molded tube, or sheet-molded tube can be used.

Alternatively, as shown in FIGS. 4(c) and 4(d), the plastic member 40a may be produced by forming a film into a cylinder and adhering the ends thereof. 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 portion 42 may be attached to form a cylindrical shape with a bottom.

Next, a method (blow molding method) for manufacturing 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 plastic material is prepared (see FIG. 5(a)). In this case, for example, the preform 10a may be produced by an injection molding method using an injection molding machine (not shown). Further, as the preform 10a, a preform generally used conventionally may be used.

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

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 produced (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 pressed into the preform 10a so as to adhere to 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 heated to 50° C. to 100° C. to heat-shrink the outer surface of the preform 10a. You may let it adhere to.

In this way, by bonding the plastic member 40a to the outside of the preform 10a in advance to fabricate the composite preform 70, a series of steps for fabricating the composite preform 70 (Figs. 5(a) to 5(b) )) and a series of steps (FIGS. 5(c) to (f)) for manufacturing the composite container 10A by blow molding can be performed at separate locations (factories, etc.).

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

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

The composite container 10A is molded using this blow molding die 50. As shown in FIG. In this case, the blow-molding mold 50 is composed of a pair of split body molds 50a and 50b and a bottom mold 50c (see FIG. 5(d)). In FIG. 5(d), the pair of body molds 50a and 50b are open from 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 trunk molds 50a and 50b are closed, and the pair of trunk molds 50a and 50b and the bottom mold 50c are closed. A blow molding mold 50 is constructed. Next, air is forced into the preform 10a and the composite preform 70 is subjected to biaxial stretch blow molding.

As a result, the container body 10 is obtained from the preform 10a in the blow molding die 50. As shown in FIG. During this time, the body molds 50a, 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 expanded together. As a result, the preform 10 a and the plastic member 40 a are integrally formed into a shape corresponding to the inner surface of the blow molding die 50 .

Thus, a composite container 10A comprising 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.

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 removed from the blow molding mold 50. Next, as shown in FIG.

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, warehouse, or the like.

While being stored in this manner, the beer-filled composite container 10A may be exposed to light, such as sunlight, directly or indirectly. In contrast, in the present embodiment, at least one of the container body 10 and the plastic member 40 after blow molding is colored in visible light. Therefore, transmission of light with a wavelength of 400 nm to 500 nm to the composite container 10A is particularly suppressed. As a result, it is possible to prevent the bitterness component in the beer from being decomposed by the sunlight and generating the sunlight odor in the beer.

Modified Example of Method for Manufacturing Composite Container for Beer Next, a modified example of the method (blow molding method) for manufacturing the composite container 10A according to the present embodiment will be described with reference to FIGS. 6(a) to 6(f). The modification shown in FIGS. 6(a) to 6(g) has a plastic member (outer shrinkable member) 40a which has the effect of shrinking the preform 10a. 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 denoted by the same reference numerals, and detailed description thereof is omitted.

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

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

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

By heating the plastic member (outer shrinkable member) 40a in this manner, the plastic member (outer shrinkable member) 40a is thermally shrunk and adheres to the outside of the preform 10a (see FIG. 6(c)). . If the plastic member (outer shrinkable member) 40a itself has shrinkability, the plastic member will be The (outer shrinkable member) 40a may be in close contact with the outside of the preform 10a.

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

The preform 10a and the plastic member (outer shrinkable member) 40a are molded using this blow molding die 50, and are molded into the container body 10 in substantially the same manner as in the case of FIGS. , and a plastic member (outer shrinkable member) 40 provided on the outer surface of the container body 10 (see FIGS. 6(d) to 6(f)).

Next, another 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. 7(a) to 7(g). In the modification shown in FIGS. 7(a) to (g), the plastic member (outer shrinkable member) 40a has the effect of shrinking the preform 10a, and the preform 10a and the plastic member (outer shrinkable member) 40a are contracted. is heated in two stages, and other configurations are substantially the same as those shown in FIGS. In FIGS. 7A to 7G, the same parts as those in FIGS. 5A to 5F are denoted by the same reference numerals, and detailed description thereof is omitted.

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

Next, a plastic member (outer shrinkable member) 40a is provided outside the preform 10a (see FIG. 7(b)).

Next, the preform 10a and the plastic member (outer shrinkable member) 40a are heated by the first heating device 55 (see FIG. 7(c)). At this time, the heating temperature of the preform 10a and the plastic member (outer shrinkable member) 40a may be, for example, 50°C to 100°C.

When the plastic member (outer shrinkable member) 40a is heated, the plastic member (outer shrinkable member) 40a is thermally shrunk and adheres to the outside of the preform 10a. As a result, a composite preform 70 having the preform 10a and the plastic member (outer shrinkable member) 40a adhered to the outside of the preform 10a is obtained (see FIG. 7(c)).

In this manner, the plastic member (outer shrinkable member) 40a is heated and adhered to the outside of the preform 10a in advance using the first heating device 55, and the composite preform 70 is manufactured. A series of steps (FIGS. 7(a) to (c)) for producing the composite container 10A by blow molding (FIGS. 7(d) to (g)) are performed in separate places (factories, etc. ) can be implemented.

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

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

The composite preform 70 is molded using this 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 FIGS. A composite container 10A including a plastic member (outer shrinkable member) 40 is obtained (see FIGS. 7(e) to (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. As a result, after the composite container 10A is filled with beer, it is possible to prevent the beer from having a sunlight smell.

Further, according to the present embodiment, the composite preform 70 is subjected to blow molding in the blow molding die 50, thereby integrally expanding the preform 10a of the composite preform 70 and the plastic member 40a, A composite container 10A including the container body 10 and the plastic member 40 is produced. As a result, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be constructed from separate members. Therefore, by appropriately selecting the type and shape of the plastic member 40, various functions and characteristics can be imparted to the composite container 10A.

Furthermore, according to the present embodiment, when manufacturing the composite container 10A, a general blow molding apparatus can be used as it is, so there is a need to prepare new molding equipment for manufacturing the composite container 10A. do not have. Moreover, since the plastic member 40a is provided outside the preform 10a, there is no need to prepare new molding equipment for molding the preform 10a.

Modified Example of Composite Container and Composite Preform Next, a modified example of the present embodiment will be described with reference to FIGS. 8 and 9. FIG.

The modification shown in FIGS. 8 and 9 uses a cylindrical plastic member 40a instead of having a trunk and a bottom as the plastic member 40a.

In the composite container 10A shown in FIG. 8, the plastic member 40 extends from the shoulder 12 of the container body 10 to the lower portion of the body 20, but does not reach the bottom 30. As shown in FIG. Further, in the composite preform 70 shown in FIG. 9, the plastic member 40a is closely attached so as to cover only the trunk portion 20a of the preform 10a. It covers the area except for the portion 13a corresponding to 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.

8 and 9, other configurations are substantially the same as the embodiment shown in FIGS. In the modification shown in FIGS. 8 and 9, the same reference numerals are given to the same parts as the embodiment shown in FIGS. 1 to 7, and detailed description thereof will be omitted. Further, 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 embodiment shown in FIGS. 1 to 7, so detailed description thereof will be omitted. Moreover, in FIGS. 8 and 9, the plastic member 40 may have a contraction action with respect to the preform 10a.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 10 to 17. FIG. 10 to 17 are diagrams showing a second embodiment of the present invention. 10 to 17, the same reference numerals are given to the same parts as in the first embodiment, 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. FIG.

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

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

Among them, the inner label member 60 is adhered to the outer surface of the container body 10 in a thinly extended state, and is adhered to the container body 10 so as not to be easily moved or rotated.

In addition, the plastic member 40 is adhered to 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 adhered to the container body 10 so as not to be easily moved or rotated. there is

At least a portion of the plastic member 40 may be translucent or transparent, in which case the inner label member 60 is visible 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, window).

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

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 circumference of the container body 10 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 , body portion 20 and bottom portion 30 of the container body 10 excluding the mouth portion 11 and neck portion 13 . Thus, desired characters, images, or the like can be applied 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.

Note that the inner label member 60 may be provided on the entire area or a partial area 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 excluding the mouth portion 11 . Furthermore, the inner label member 60 is not limited to one, and a plurality of inner label members 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, inner label member 60 is preferably completely covered by 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.

When the inner label member 60 is colored with visible light, it is preferable that the inner label member 60 has a transmittance of 20% or less for light with a wavelength of 400 nm to 500 nm. Moreover, it is preferable to make the container main body 10 colorless and transparent. In this case, it is possible to prevent the beer filled in the composite container 10A from having a sunlight odor, and to separate and remove the inner label member 60 and the plastic member 40 from the container body 10, thereby recycling the transparent container body 10. be able to. In addition, 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 that the entire surface is colored.

Further, while the inner label member 60 is colored in a visible light color, the plastic member 40a may display character information such as the name of the beer, the name of the manufacturer, the names of the raw materials, etc., in addition to the pattern, the product name, and the like. In this case, a single type of inner label member 60 can be used, and the design of the plastic member 40 can be varied according to the type of beer, the manufacturer, the destination, and the like.

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

Next, referring to FIG. 12, the configuration of the composite preform according to this embodiment will be described.

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. A bottomed cylindrical plastic member 40a is 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 to the extent that it does not easily move or rotate, or in close contact with the preform 10a to the extent that it does not 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 predesigned or printed. For example, character information such as the name of the beer, which is the content liquid, the manufacturer, and the name of the raw material may be written in addition to the design, product name, and the like. In this case, images and characters can be displayed on the composite container 10A without attaching a separate label or the like to the container body 10 after blow molding. For example, an inner label member 60a may be provided on all or part of the body portion 20a of the preform 10a so that an image or characters are displayed on the body portion 20 of the container body 10 after molding. This eliminates the need for a labeling step using a labeler after the container is sealed, thereby reducing the manufacturing cost and preventing a decrease in yield.

As the 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 without being adhered to the outer surface of the inner label member 60a, and is in close contact with the preform 10a so as not to move or rotate, or in close contact so as not to fall under its own weight. It is

In addition, 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 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 them may be provided. For example, two inner label members 60a and plastic members 40a may be provided at two locations on the outer side of body 20a.

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

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

Next, a manufacturing method (blow molding method) for 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 plastic material is prepared (see FIG. 13(a)).

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. As a result, 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 manufactured (FIG. 13). (b)). In this case, the inner label member 60 a has a cylindrical shape with a bottom as a whole, and has a cylindrical trunk portion 61 and a bottom portion 62 connected to the trunk portion 61 .

At this time, the inner label member 60a and the plastic member 40a, which have inner diameters that are the same as or slightly smaller than the outer diameter of the preform 10a, may be pressed against the preform 10a, respectively, to adhere to 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 heated to 50° C. to 100° C. to be thermally shrunk. It may be brought into close contact with the outer surface of the preform 10a.

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

In this way, the plastic member 40a is brought into close contact with the outer sides of the preform 10a and the inner label member 60a in advance to produce the composite preform 70, thereby producing a series of steps for producing the composite preform 70 (see FIG. 13 ( a) to (b)) and a series of steps for manufacturing the composite container 10A by blow molding (FIGS. 13(d) to (f)) can be performed at separate locations (factories, etc.).

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

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 the container body 10 and the inner label member provided on the outer surface of the container body 10 are formed in substantially the same manner as in the first embodiment described above. 60 and the plastic member 40 provided outside 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 in the case of the above-described first embodiment, so detailed description thereof will be omitted here.

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

The modification shown in FIGS. 14(a) to 14(f) has an inner label member 60 provided outside the preform 10a, and a plastic member (outer shrinkable member) 40a provided outside the inner label member 60. , and other configurations are substantially the same as those shown in FIGS.

The modification shown in FIGS. 15(a) to 15(g) has an inner label member 60 provided outside the preform 10a, and a plastic member (outer shrinkable member) 40a provided outside the inner label member 60. , and other configurations are substantially the same as those 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. 16 and 17. FIG.

The modification shown in FIGS. 16 and 17 uses a cylindrical inner label member 60a and plastic member 40a instead of having a trunk and a bottom as the inner label member 60a and plastic member 40a. . Other configurations are substantially the same as those of the embodiment shown in FIGS. In the modified example shown in FIGS. 16 and 17, the same reference numerals are given to the same parts as in the embodiment shown in FIGS. 10 to 13, and detailed description thereof will be omitted. Also, the method of manufacturing the composite container 10A and the method of manufacturing the composite preform 70 are substantially the same as those of the embodiment shown in FIGS. 10 to 13, so detailed description thereof will be omitted.

REFERENCE SIGNS LIST 10 container body 10A composite container 10a preform 11, 11a mouth 12 shoulder 13 neck 14 screw 17 flange 20, 20a trunk 30, 30a bottom 40, 40a plastic member 41 trunk 42 bottom 50 blow molding mold 60, 60a inner label member 61 body 62 bottom 70 composite preform

Claims (1)

In the method for manufacturing a composite container for beer,
providing a test tube preform made of plastics material;
A step of providing a heat-shrinkable plastic member on the outside of the preform, heating the plastic member to heat-shrink it, and bringing it into close contact with the outer surface of the preform;
By subjecting the preform and the plastic member to blow molding only once, the preform and the plastic member are integrally expanded to have a mouth portion, a neck portion, a shoulder portion, a trunk portion and a bottom portion. obtaining a composite container for beer comprising a container body and a plastic member provided on the outer surface of the container body,
At least one of the preform and the plastic member is colored so that the transmittance for light with a wavelength of 400 nm to 500 nm is 20% or less,
The bottom portion of the container body has a recess located in the center and a grounding portion provided around the recess,
The plastic member is provided in close contact with the entire area of the recess and the grounding portion along the shape of the recessed portion and the grounding portion of the bottom portion of the container body. Production method.

Images