JP2016117170A - Production method of beer composite container, composite preform, beer composite container, inside label member and plastic member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method of a beer composite container, a composite preform, a beer composite container, an inside label member and a plastic member, capable of preventing such a defect that, sun smell occurs on beer.SOLUTION: Provided is a beer composite container 10A produced by: (a) preparing a preform 10a made of a plastic material; (b) providing a plastic member 40a which is a direct blow molding product and is colored to visible light color, on an outside of the preform 10a; (d),(e) then, performing blow molding to the preform 10a and the plastic member 40a; (f) thereby, integrating and expanding the preform 10a and the plastic member 40a.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 for storing content liquids such as foods and drinks have become common, and such plastic bottles store content liquids.

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

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

JP 2009-241526 A

  Conventionally, plastic bottles are required to be colorless and transparent because it is necessary to facilitate the recycling of plastic bottles. On the other hand, it is generally known that when a colorless and transparent container is filled with beer and exposed to sunlight, a modified odor called sunlight odor is generated in the beer. For this reason, beer is generally sold in aluminum cans or colored glass bottles and sold, and it is considered difficult to fill beer in plastic bottles.

  The present invention has been made in consideration of such points, and even when beer is filled, a method of manufacturing a composite container for beer that can prevent a problem that a odor of sunlight is generated in beer. An object is to provide a composite preform, a composite container for beer, an inner label member, and a plastic member.

  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, and a plastic member that is colored in a visible light color and is a direct blow molded product on the outside of the preform. A beer composite container comprising: a step of providing and a step of blow-molding the preform and the plastic member to expand the preform and the plastic member integrally. It is a manufacturing method.

  The present invention is the method for producing a composite container for beer, wherein the preform is colorless and transparent.

  This invention is a manufacturing method of the composite container for beer characterized by the transmittance | permeability with respect to the light of wavelength 400nm-500nm of the said plastic member being 20% or less.

  The present invention is the composite container for beer characterized in that the plastic member has a cylindrical body portion and a bottom portion, and an opening is provided in the bottom portion of the plastic member before blow molding. It is a manufacturing method.

  The present invention is the method for manufacturing a composite container for beer, wherein the opening is closed after blow molding.

  The present invention relates to a method for producing a composite container for beer, a step of preparing a preform made of plastic material, a step of providing an inner label member on the outside of the preform, and an outer side of the inner label member made of plastic. A step of providing a member, and a step of inflating the preform, the inner label member, and the plastic member together by performing blow molding on the preform, the inner label member, and the plastic member. The beer composite container manufacturing method is characterized in that at least one of the inner label member and the plastic member is colored by visible light and is a direct blow molded product.

  The present invention relates to a composite preform for a beer composite container, a plastic material preform and a plastic which is provided so as to surround the outside of the preform and is colored in a visible light color and is a direct blow molded product A composite preform, wherein the plastic member is in close contact with the outside of the preform.

  The present invention is the composite preform characterized in that the preform is colorless and transparent.

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

  The present invention is the composite preform, wherein the plastic member has a cylindrical body portion and a bottom portion, and an opening is provided in the bottom portion of the plastic member.

  The present invention relates to 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 an outer side of the inner label member. A plastic member provided to surround the plastic member, and the plastic member is in close contact with the outside of the preform and the inner label member, and at least one of the inner label member and the plastic member is: A composite preform characterized by being colored by visible light and being a direct blow molded product.

  The present invention provides a composite container for beer, comprising a container body made of a plastic material and a plastic member which is provided in close contact with the outside of the container body and colored in a visible light color and which is a direct blow molded product. The container body and the plastic member are a composite preform characterized by being integrally expanded by blow molding.

  The present invention is the composite container for beer characterized in that the container body is colorless and transparent.

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

  In the composite container for beer, the present invention is provided with a container body made of plastic material, an inner label member provided in close contact with the outside of the container body, and in close contact with the outer side 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 inner label member and the plastic member is visible light. It is a composite container for beer characterized by being colored in color and being a direct blow molded product.

  The present invention is a composite preform having the preform and a plastic member in close contact with the outside of the preform, which is mounted so as to surround the outside of the preform and is heated together with the preform. A plastic member for producing a plastic, characterized in that it has a cylindrical body portion that covers at least the body portion of the preform, and is colored by visible light and is a direct blow molded product It is a member made.

  The present invention is mounted so as to surround the outer side of the preform, is mounted on the inner side of the plastic member, and is heated together with the preform and the plastic member, whereby the preform and the preform An inner label member for producing a composite preform having an inner label member in close contact with the outside of the inner label member and the plastic member in close contact with the outer side of the inner label member, wherein at least a body portion of the preform The inner label member is characterized in that it is a direct blow-molded product that has a cylindrical body portion that covers and is colored in visible light.

  ADVANTAGE OF THE INVENTION According to this invention, the malfunction which a sunlight odor generate | occur | produces in beer can be prevented, after filling the beer composite container with beer.

FIG. 1 is a partial vertical sectional view showing a composite container according to a first embodiment of the present invention. FIG. 2 is a horizontal sectional view showing the composite container according to the first embodiment of the present invention (sectional view taken along the line II-II in FIG. 1). FIG. 3 is a partial vertical sectional view showing the composite preform according to the first embodiment of the present invention. 4A to 4D are schematic views showing a method for producing a plastic member which is a direct blow molded product. FIGS. 5A to 5F are schematic views showing a method of manufacturing the composite container according to the first embodiment of the present invention. FIG. 6 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 7 is a horizontal sectional view (sectional view taken along line VII-VII in FIG. 6) showing the composite container according to the second embodiment of the present invention. FIG. 8 is a partial vertical sectional view showing a composite preform according to the second embodiment of the present invention. FIGS. 9A to 9F are schematic views showing a method for manufacturing a composite container according to the second embodiment of the present invention.

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 to 5 are views showing a first embodiment of the present invention.

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

  A composite container (composite container for beer) 10A shown in FIG. 1 and FIG. 2 includes a composite preform 70 including a preform 10a and a plastic member 40a using a blow molding die 50 (see FIG. 3). The preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded by subjecting to biaxial stretch blow molding.

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

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

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

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

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

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

  Furthermore, the trunk | drum 20 has a cylindrical shape with 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 cylindrical shape such as a rectangular cylindrical shape or an octagonal cylindrical shape. Or the trunk | drum 20 may have a cylinder shape with a horizontal cross section which is not uniform toward upper direction from the downward direction. Moreover, in this Embodiment, although the unevenness | corrugation is not formed in the trunk | drum 20, and has a substantially flat surface, it is not restricted to this. For example, unevenness such as a panel or a groove may be formed on the body portion 20.

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

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

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

  The container body 10 can also be formed as a multilayer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer has gas barrier properties and light shielding properties such as MXD6, MXD6 + fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate). You may form as a multilayer bottle which has gas barrier property and light-shielding property by shape | molding the preform 10a which consists of 3 or more layers as resin which has (intermediate layer), and carrying out blow molding. As the intermediate layer, a resin obtained by blending the above-described various resins may be used.

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

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

  Next, the plastic member 40 will be described. As will be described later, the plastic member 40 (40a) is provided so as to surround the outside of the preform 10a, and is obtained by being in close contact with the outside of the preform 10a and then being biaxially stretch blow-molded together with the preform 10a. It is a thing. As will be described later, the plastic member 40 is produced by stretching a plastic member 40a, which is a direct blow molded product colored in a visible light color, together with the preform 10a.

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

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

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

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

  By the way, in this Embodiment, the plastic members 40 are colored in visible light color. For example, the plastic member 40 may be colored with visible light, and the container body 10 may be colored with a predetermined color or colorless and transparent. Alternatively, both the container body 10 and the plastic member 40 may be colored in a visible light color.

  Thereby, light with a wavelength of 400 nm to 500 nm out of light entering the composite container 10A from the outside, such as sunlight, is difficult to transmit through the composite container 10A. As a result, the problem that the bitter component in beer is decomposed by sunlight and 3-methyl-2-butene-1-thiol, which is a sunlight odor component, can be prevented. In this specification, “beer” is defined in the Japanese liquor tax law, that is, “fermented using malt, hops and water as raw materials.” And malt, hops, water, rice and other government ordinances. In addition to “fermented liquor that has been fermented as a raw material (provided that the total weight of the articles specified by the relevant ordinance does not exceed a sufficient five of the weight of the malt” in the raw materials) That is, the weight of malt in the raw material is (1) 67/100 or more of the weight of raw materials other than water, (2) 50/100 or more and less than 67/100, (3) 100 minutes Also included are those having 25 or more and less than 50/100, and (4) those having less than 25/100, so-called “third beer”, “beer-taste beverage”, and “miscellaneous sake”.

  In particular, the container body 10 may be colorless and transparent, and the plastic member 40 may be transparent to visible light. 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, it is possible to prevent the inconvenience of generating a sunlight odor in the beer filled in the composite container 10A, and to peel and remove the plastic member 40 from the container body 10 and to recycle the transparent container body 10 as in the conventional case. Can do. In addition, when coloring the container main body 10 and / or the plastic member 40 in visible light color, it is preferable that 80% or more of each surface area is colored, and it is further more preferable that each whole is colored. In this embodiment mode, the visible light color may be various colors, but it is particularly preferable that the visible light color be a color that hardly transmits light having a wavelength of 400 nm to 500 nm. Specifically, the visible light color is preferably a color such as brown or orange.

  When producing the plastic member 40 colored in visible light color, a visible light color pigment may be added to the molding material in the step of producing the plastic member 40a before blow molding by injection molding or the like. .

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

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

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

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

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

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

  In FIG. 3, the plastic member 40 a has a cylindrical body portion 41 and a hemispherical bottom portion 42, and an opening 44 (air hole) is provided in the bottom portion 42. In this case, the opening 44 may be provided at one center of the bottom portion 42 (see FIG. 3), or may be provided at a plurality of locations including the center of the bottom portion 42 and the periphery thereof. The position and number of the openings 44 are not limited to this.

  In addition, the shape of each opening 44 may be a circular shape, a rectangular shape, an elliptical shape, a rounded rectangular shape, a rhombus shape, a triangular shape, a pentagonal shape, an arrow blade shape, a hexagonal shape, or the like. The width (diameter) of the opening 44 is preferably 0.5 mm to 5.0 mm.

  Thus, by providing the opening 44 in the bottom portion 42 of the plastic member 40a, when the bottomed plastic member 40a is fitted into the preform 10a (see FIG. 5B), the opening 44 is an air escape path. Therefore, the plastic member 40a can be smoothly attached to the preform 10a.

  When the width (diameter) of the opening 44 is 3 mm or less, after the plastic member 40a is blow-molded, the opening 44 is closed along with the expansion of the plastic member 40a (at least small enough to be visually invisible). Become). For this reason, there is little possibility that functions, such as gas barrier property with respect to the bottom part 30 of the container main body 10, and light barrier property, will be impaired by presence of the opening 44. FIG.

  In the present embodiment, the plastic member 40a is a direct blow molded product produced by a direct blow molding method. Hereinafter, a method for manufacturing the plastic member 40a by the direct blow molding method will be described.

  The plastic member 40a which is a direct blow-molded product includes a step of heating and melting a resin material, a step of extruding the heated and melted resin material to form a tubular parison, and air in the tubular parison in a mold. And a step of blow molding a tube-shaped parison in accordance with the shape of the mold (direct blow molding method).

  Specifically, the plastic member 40a can be manufactured by the method shown in FIGS. Hereinafter, a method for manufacturing the plastic member 40a will be described with reference to FIGS.

  First, as shown in FIG. 4A, the resin material 74 is heated and melted using an extruder 73. Next, this heated and melted resin material 74 is extruded from the die 75 of the extruder 73 into a tube shape, thereby forming a tube-shaped parison 76. Next, as shown in FIG. 4B, the tubular parison 76 pushed out from the die 75 is sandwiched by, for example, a two-part mold 77. Next, as shown in FIG. 4C, air is blown into the tubular parison 76 from the blow nozzle 78. Thereby, the tubular parison 76 is shaped according to the shape of the mold 77, and then the shaped tubular parison 76 is cooled. Thereafter, the mold 77 is opened to obtain a bottomed cylindrical plastic member 40a as shown in FIG.

  In addition, the opening 44a can be provided by perforating the bottom part 42 of the plastic member 40a thus obtained using, for example, a needle-like protrusion. Or you may form the opening 44a by shaping with the metal mold | die 77. FIG.

  Examples of the plastic member 40a include polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS tree, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, Ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluoro rubber, nylon 6, nylon 6,6, nylon MXD6, aromatic poly , Polycarbonate, ethylene polyterephthalate, polybutylene terephthalate, poly ethylene naphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyether ketone, polyether ether ketone, unsaturated polyester, alkyd resin, polyimide, polysulfone, polyphenylene Examples thereof include sulfide, polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, and epoxy resin. Among these, it is preferable to use thermoplastic inelastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). Moreover, those blend materials, multilayer structures, and partial multilayer structures may be used. Furthermore, various additives other than the main component resin may be added to the material of the plastic member 40a as long as the characteristics are not impaired. Examples of additives include plasticizers, UV stabilizers, anti-coloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, yarn friction reducing agents, slip agents, mold release agents, An oxidizing agent, an ion exchange agent, a coloring pigment, and the like can be added. Also, by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, a foam member having a foam cell diameter of 0.5 to 100 μm is used, and this foam preform is molded. , The light shielding property can be improved.

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

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

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

  Further, the plastic member 40a may be made of a material having a higher cold insulation property (a material having a low thermal conductivity) than the plastic material constituting the container body 10 (preform 10a). In this case, it is possible to make it difficult to transmit the temperature of beer, which is the content liquid, to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. Thereby, the cool property of 10 A of composite containers is improved. For example, the plastic member 40 may be provided on the whole or a part of the body 20 in the container body 10 to 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. Examples of such materials include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. Moreover, you may use the foaming member with the foam cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the melt of a thermoplastic resin.

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

  The plastic member 40a may be preliminarily printed with 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 performed on the plastic member 40a before being attached to the preform 10a, or may be performed in a state where the plastic member 40a is provided outside the preform 10a. The plastic member 40a may be colored in colors such as red, blue, yellow, green, brown, black, and white, and may be transparent or opaque.

  In the present embodiment, the plastic member 40a is colored in a visible light color. For example, the plastic member 40a may be colored with visible light, and the preform 10a may be colored with a predetermined color or made colorless and transparent. Alternatively, both the preform 10a and the plastic member 40a may be colored visible light. Thereby, since the composite container 10A produced by blow molding has a structure that hardly transmits light having a wavelength of 400 nm to 500 nm, a problem that a sunlight odor is generated in beer is prevented. In the case where 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 a process of producing them 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, 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 10 </ b> A with beer, it is possible to prevent the sun odor from being generated in the beer and to recycle the transparent container body 10.

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

  As shown in FIG. 3, the plastic member 40 a has a bottomed cylindrical shape as a whole, and may have a cylindrical body 41 and a bottom 42 connected to the body 41. In this case, since the bottom part 42 of the plastic member 40a covers the bottom part 30a of the preform 10a, in addition to the trunk part 20 of the composite container 10A, the bottom part 30 also has various barrier properties such as a barrier property against light having a wavelength of 400 nm to 500 nm. Functions and properties can be added. The plastic member 40a is not limited to the one having the bottom portion 42. For example, the plastic member 40a may have a circular tube shape (bottomless cylindrical shape) as a whole and may have a cylindrical body portion 41.

  Next, a 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.

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

  Next, the plastic member 40a is prepared. The plastic member 40a is a direct blow-molded product, and is produced, for example, by the method shown in FIGS. In this case, the plastic member 40 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member 40a is colored in advance with a visible light color.

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

  In the present embodiment, a plastic member 40a having an inner diameter that is the same as or slightly smaller than the outer diameter of the preform 10a is pressed into the preform 10a to be brought into close contact with the outer surface of the preform 10a. In this case, since the opening 44 (air hole) is provided in the bottom portion 42 of the plastic member 40a, the plastic member 40a can be smoothly fitted into the preform 10a.

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

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

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

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

  Next, as shown in FIG. 5E, after the bottom mold 50c is lowered, the pair of body molds 50a, 50b is closed, and sealed by the pair of body molds 50a, 50b and the bottom mold 50c. A blow mold 50 is formed. Next, air is press-fitted into the preform 10 a and biaxial stretch blow molding is performed on the composite preform 70.

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

  Thus, the composite container 10A provided with the container main body 10 and the plastic member 40 provided on the outer surface of the container main body 10 and colored in a visible light color is obtained. In this case, since the plastic member 40a is expanded by blow molding, the opening 44 is closed.

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

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

  While being stored in this way, the composite container 10A filled with beer can be directly or indirectly irradiated with light such as sunlight. On the other hand, in the present embodiment, the plastic member 40 is colored in visible light. For this reason, in particular, transmission of light having a wavelength of 400 nm to 500 nm with respect to the composite container 10A can be suppressed. As a result, it is possible to prevent the bitter components in the beer from being decomposed by sunlight and generating a sunlight odor in the beer. Further, by covering the bottom 30 of the container body 10 with the plastic member 40, it is possible to prevent light from entering the container body 10 from the bottom side, and more reliably prevent a problem that a sunlight odor is generated in beer. Can do.

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

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

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 9 are views showing a second embodiment of the present invention. 6 to 9, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, the outline | summary of the composite container by this Embodiment is demonstrated with FIG. 6 and FIG.

  The composite container 10A shown in FIGS. 6 and 7 is formed into a composite preform 70 (see FIG. 8) including a preform 10a, an inner label member 60a, and a plastic member 40a using a blow molding die 50, as will be described later. On the other hand, by performing biaxial stretch blow molding, the preform 10a, the inner label member 60a, and the plastic member 40a of the composite preform 70 are integrally expanded.

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

  Among these, the 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.

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

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

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

  The inner label member 60 is attached to the outer surface of the container body 10 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. The inner label member 60 is thinly stretched on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 7, 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 trunk portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11 and the neck portion 13. Thereby, desired characters, images, and the like can be imparted to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container main body 10, and the composite container 10A can be decorated and information can be displayed.

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

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

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

  When the inner label member 60 is colored with visible light, 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. The container body 10 is preferably made colorless and transparent. In this case, it is possible to prevent a problem that a sunlight odor is generated in the beer filled in the composite container 10A, and the inner label member 60 and the plastic member 40 are peeled and removed from the container body 10, and the transparent container body 10 is recycled. be able to. In addition, when coloring the inner side label member 60 in visible light color, it is preferable that 80% or more of a surface area is colored, and it is still more preferable to color the whole.

  Further, while the inner label member 60 is colored in visible light color, the plastic member 40a may display character information such as the name of the beer, the manufacturer, and the raw material name in addition to the design and the product name. 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 depending on the type of beer, manufacturer, 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 in the first embodiment described above, detailed description thereof is omitted here.

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

  As shown in FIG. 8, the composite preform 70 includes a plastic material preform 10a, a bottomed cylindrical inner label member 60a provided in close contact with the outer side of the preform 10a, and an inner label member 60a. And a bottomed cylindrical plastic member 40a provided in close contact with the outside.

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

  The inner label member 60a may be previously designed or printed. For example, in addition to the design and product name, character information such as the name of the beer that is the content liquid, the manufacturer, and the name of the raw material may be described. In this case, it is possible to display images and characters on the composite container 10A without separately providing 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 trunk portion 20a of the preform 10a, and images and characters may be displayed on the trunk portion 20 of the container body 10 after molding. This eliminates the need for a labeling process using a labeler after the container is tightly sealed, so that the manufacturing cost can be suppressed and the yield can be prevented from decreasing.

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

  In FIG. 8, an opening 64 (air hole) is provided at the bottom of the inner label member 60a. The width (diameter) of the opening 64 is preferably 0.5 mm to 5.0 mm. Thus, by providing the opening 64 at the bottom of the inner label member 60a, when the bottomed inner label member 60a is fitted into the preform 10a (see FIG. 9B), the opening 64 serves as an air escape path. Therefore, the inner label member 60a can be smoothly attached to the preform 10a.

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

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

  In the present embodiment, at least one of the inner label member 60a and the plastic member 40a is a direct blow molded product colored in a visible light color. When the inner label member 60a is colored in a visible light color, it is preferable that the transmittance of the inner label member 60a with respect to light having a wavelength of 400 nm to 500 nm is 20% or less. The method for producing the inner label member 60a by the direct blow molding method is substantially the same as that for producing the plastic member 40a (see FIGS. 4A to 4D).

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

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

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

  Next, an inner label member 60a is provided outside the preform 10a, and a plastic member 40a is provided outside the inner label member 60a. Thus, a composite preform 70 having the preform 10a, the inner label member 60a in close contact with the outer side of the preform 10a, and the plastic member 40a in close contact with the outer side of the inner label member 60a is produced (FIG. 9). (See (b)). In this case, the inner label member 60 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

  At this time, the inner label member 60a and the plastic member 40a having an inner diameter that is the same as or slightly smaller than the outer diameter of the preform 10a are pressed into the preform 10a to be brought into close contact with the outer surface of the preform 10a. In this case, since the openings 44 and 64 (air holes) are provided in the bottom portion 42 of the plastic member 40a and the bottom portion 62 of the inner label member 60a, respectively, the plastic member 40a and the inner label member 60a can be smoothly fitted. Can do.

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

  In this way, a series of steps for producing the composite preform 70 by previously bringing the plastic member 40a into close contact with the outside of the preform 10a and the inner label member 60a and producing the composite preform 70 (FIG. 9 ( a) to (b)) and a series of steps (FIGS. 9 (d) 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. 9C).

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow mold 50. The composite container 10A is molded using this blow molding die 50, and is substantially the same as in the case of the first embodiment described above, and the container body 10 and the inner label member provided on the outer surface of the container body 10. 60 and the composite container 10A provided with the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 9D to 9F).

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

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

Claims (17)

In the method for producing a composite container for beer,
Preparing a preform made of plastic material;
A step of providing a plastic member which is colored in a visible light color and is a direct blow molded product on the outside of the preform;
A method for producing a composite container for beer, comprising: performing blow molding on the preform and the plastic member to expand the preform and the plastic member integrally.   The method for producing a composite container for beer according to claim 1, wherein the preform is colorless and transparent.   The method for producing a composite container for beer according to claim 1 or 2, wherein the plastic member has a transmittance for light having a wavelength of 400 nm to 500 nm of 20% or less.   The said plastic member has a cylindrical trunk | drum and a bottom part, The opening is provided in the said bottom part of the said plastic member before blow molding, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. A method for producing a composite container according to one item.   The method for manufacturing a composite container according to claim 4, wherein the opening is closed after blow molding. In the method for producing a composite container for beer,
Preparing a preform made of plastic material;
Providing an inner label member on the outside of the preform;
Providing a plastic member outside the inner label member;
And inflating the preform, the inner label member and the plastic member together by performing blow molding on the preform, the inner label member and the plastic member,
At least one of the inner label member and the plastic member is colored in a visible light color and is a direct blow-molded product. In composite preforms for beer composite containers,
A preform made of plastic material,
It is provided so as to surround the outside of the preform, and is provided with a plastic member that is colored in visible light and is a direct blow molded product,
The composite preform, wherein the plastic member is in close contact with the outside of the preform.   The composite preform according to claim 7, wherein the preform is colorless and transparent.   The composite preform according to claim 7 or 8, wherein the plastic member has a transmittance of 20% or less with respect to light having a wavelength of 400 nm to 500 nm.   The said plastic member has a cylindrical trunk | drum and a bottom part, The opening is provided in the said bottom part of the said plastic member, The Claim 7 thru | or 9 characterized by the above-mentioned. Composite preform. In composite preforms for beer composite containers,
A preform made of plastic material,
An inner label member provided in close contact so as to surround the outside of the preform;
A plastic member provided so as to surround the outside of the inner label member,
The plastic member is in close contact with the outside of the preform and the inner label member,
At least one of the inner label member and the plastic member is colored with visible light and is a direct blow molded product. In a composite container for beer,
A container body made of plastic material;
It is provided in close contact with the outside of the container body, and is provided with a plastic member that is colored in visible light and is a direct blow molded product,
The beer composite container, wherein the container body and the plastic member are integrally expanded by blow molding.   The composite container for beer according to claim 12, wherein the container body is colorless and transparent.   14. The composite container for beer according to claim 12, wherein a transmittance of the plastic member with respect to light having a wavelength of 400 nm to 500 nm is 20% or less. In a composite container for beer,
A container body made of plastic material;
An inner label member provided in close contact so as to surround the outside of the container body;
A plastic 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 inflated integrally by blow molding,
At least one of the inner label member and the plastic member is colored with a visible light color and is a direct blow-molded product. In order to produce 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 together with the preform. A plastic member of
It has a cylindrical body that covers at least the body of the preform,
A plastic member characterized by being colored in visible light and being a direct blow molded product. It is attached so as to surround the outside of the preform and is attached to the inside of the plastic member and is heated together with the preform and the plastic member so as to be in close contact with the preform and the outside of the preform. An inner label member for producing a composite preform having the inner label member made and the plastic member adhered to the outside of the inner label member,
It has a cylindrical body that covers at least the body of the preform,
An inner label member colored in visible light and being a direct blow molded product.

Images