JP2020075511A - Composite container and production method of the same, plastics member, and composite preform - Google Patents

Abstract

To provide a composite container and a production method of the container, by which various functions and characteristics can be imparted to containers and containers in various designs can be obtained, and a preform and a composite preform.SOLUTION: First, a plastics preform 10a is prepared, and a plastics member 40a is disposed to enclose the outside of the preform 10a so as to produce a composite preform 70 having the preform 10a and the plastics member 40a adhered to the outside of the preform 10a. Then a composite container 10A is obtained by heating and inserting the composite preform 70 into a blow-molding die 50 and subjecting the composite preform 70 to blow-molding in the blow-molding die 50 so as to integrally expand the preform 10a and the plastics member 40a of the composite preform 70. The plastics member includes at least two or more colored layers.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite container, a method for manufacturing the same, a plastic member, and a composite preform.

  In recent years, plastic bottles have become common as a bottle for storing a liquid content such as food and drink, and the liquid content is stored in such a plastic bottle.

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

  By the way, in the conventional biaxial stretching blow molding method, for example, a preform containing a single-layer material such as PET or PP, a multi-layer material, a blend material, or the like is used to form a container shape. However, in the conventional biaxial stretch blow molding method, it is general that the preform is simply molded into a container shape. Therefore, when the container has various functions and characteristics (barrier property, heat retaining property, etc.), its means is limited, for example, by changing the material forming the preform. In particular, it is difficult to give different functions and characteristics depending on the part of the container (for example, the body or the bottom).

JP, 2009-241526, A

  The present invention has been made in consideration of such points, and is capable of imparting various functions and characteristics to a container, a composite container and a method for producing the same, a plastic member, and a composite preform. The purpose is to provide.

The present invention is a composite container,
A container body made of plastic material,
A plastic member on the outer surface of the container body,
The container body and the plastic member are integrally expanded by blow molding,
The plastic member is a composite container comprising at least two colored layers containing a resin material and a colorant.

  The present invention is the composite container, wherein the content of the colorant in the colored layer is 0.1 to 10 parts by mass with respect to 100 parts by mass of the resin material.

  The present invention is the composite container, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment.

  The present invention is the composite container, wherein the plastic member has a visible light transmittance of 50% or less.

The present invention is a method for manufacturing a composite container,
A step of preparing a preform made of a plastic material,
By providing a plastic member so as to surround the outside of the preform, a step of producing a composite preform having the preform and the plastic member adhered to the outside of the preform,
Heating the composite preform and inserting it into a blow mold,
By subjecting the composite preform to blow molding in the blow molding die, the preform of the composite preform and the step of expanding the plastic member integrally,
The method for producing a composite container is characterized in that the plastic member comprises at least two colored layers containing a resin material and a colorant.

  The present invention is the method for producing a composite container, wherein the content of the colorant in the colored layer is 0.1 to 10 parts by mass with respect to 100 parts by mass of the resin material.

  The present invention is the method for producing a composite container, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment.

  The present invention is the method for producing a composite container, wherein the plastic member has a visible light transmittance of 50% or less.

The present invention provides a composite container which is mounted so as to surround the outside of a preform and is heated integrally with the preform, thereby having the preform and a plastic member adhered to the outside of the preform. A plastic member for making,
At least having a tubular body that covers the body of the preform,
A plastic member having at least two colored layers containing a resin material and a colorant.

  The present invention is the plastic member, wherein the content of the colorant in the colored layer is 0.1 to 10 parts by mass with respect to 100 parts by mass of the resin material.

  The present invention is the plastic member, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment.

The present invention is a composite preform,
A preform made of plastic material,
A plastic member provided so as to surround the outside of the preform,
The plastic member is adhered to the outside of the preform,
The plastic member is a composite preform having at least two colored layers containing a resin material and a colorant.

The present invention is the composite preform, wherein the content of the colorant in the colored layer is 0.1 to 10 parts by mass with respect to 100 parts by mass of the resin material.

  The present invention is the composite preform, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment.

  According to the present invention, the preform of the composite preform and the plastic member are integrally expanded by performing blow molding on the composite preform in the blow molding die. For this reason, the preform (container body) and the plastic member can be composed of different members, and various functions and characteristics can be given to the composite container by appropriately selecting the type and shape of the plastic member. it can. Further, since at least two colored layers containing a resin material and a colorant are provided, the design of the composite container can be various and the visibility can be improved. In addition, the visible light transmittance of the plastic member can be reduced, and the denaturation of the content liquid filled in the composite container due to visible light can be prevented.

FIG. 1 is a partial vertical sectional view showing a composite container according to a first embodiment of the present invention. FIG. 2 is a horizontal cross-sectional view (cross-sectional view taken along the line II-II of FIG. 1) showing the composite container according to the first embodiment of the present invention. FIG. 3 is a vertical sectional view showing a composite preform according to the first embodiment of the present invention. FIG. 4 is a schematic cross-sectional view showing the layer structure of a plastic member. 5A to 5D are perspective views showing various plastic members. 6A to 6F are schematic views showing the blow molding method according to the first embodiment of the present invention. 7A to 7F are schematic views showing a blow molding method according to a modification of the first embodiment of the present invention. FIGS. 8A to 8G are schematic views showing a blow molding method according to a modified example of the first embodiment of the present invention. FIG. 9 is a partial vertical sectional view showing a modified example of the composite container according to the first embodiment of the present invention. FIG. 10 is a vertical cross-sectional view showing a modified example of the composite preform according to the first embodiment of the present invention. 11A to 11F are schematic views showing a modification of the blow molding method according to the first embodiment of the present invention. FIG. 12 is a partial vertical sectional view showing a composite container according to the second embodiment of the present invention. FIG. 13 is a horizontal cross-sectional view (cross-sectional view taken along the line XIII-XIII in FIG. 12) showing the composite container according to the second embodiment of the present invention. FIG. 14 is a vertical cross-sectional view showing a composite preform according to the second embodiment of the present invention. FIGS. 15A to 15D are perspective views showing various inner label members and various plastic members. 16A to 16F are schematic views showing a blow molding method according to the second embodiment of the present invention. 17A to 17F are schematic views showing a blow molding method according to a modified example of the second embodiment of the present invention. 18A to 18G are schematic views showing a blow molding method according to a modified example of the second embodiment of the present invention. FIG. 19 is a partial vertical sectional view showing a modified example of the composite container according to the second embodiment of the present invention. FIG. 20 is a vertical sectional view showing a modified example of the composite preform according to the second embodiment of the present invention. 21A to 21F are schematic views showing a modified example of the blow molding method 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 10 are views showing a first embodiment of the present invention.

  First, an outline of a composite container manufactured by the 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" mean the upper side and the lower side, respectively, in a state where the composite container 10A is upright (Fig. 1).

  The composite container 10A shown in FIGS. 1 and 2 is biaxially stretched with respect to 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 as one by performing blow molding.

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

  The container body 10 includes a mouth portion 11, a neck portion 13 provided below the mouth portion 11, a shoulder portion 12 provided below the neck portion 13, a body portion 20 provided below the shoulder portion 12, and a body portion And a bottom 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 extended state, and is attached to the container body 10 in a state in which it does not easily move or rotate.

  Next, the container body 10 will be described in detail. The container body 10 includes 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 screw portion 14 screwed to a cap (not shown) and a flange portion 17 provided below the screw portion 14. The shape of the mouth portion 11 may be a conventionally known shape.

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

  Further, the body portion 20 has a cylindrical shape having a substantially uniform diameter as a whole. However, the present invention is not limited to this, and the body portion 20 may have a polygonal tubular shape such as a quadrangular tubular shape or an octagonal tubular shape. Alternatively, the body portion 20 may have a tubular shape having a horizontal cross section that is not uniform from the upper side to the lower side. Further, in the present embodiment, the body portion 20 has no unevenness and has a substantially flat surface, but the present invention is not limited to this. For example, the body portion 20 may be formed with unevenness such as a panel or a groove.

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

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

  Such a container body 10 can be manufactured by subjecting a preform 10a (described later) manufactured by injection molding of a synthetic resin material to biaxial stretch blow molding. 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. Moreover, you may blend and use the above-mentioned various resins. The container body 10 may be colored in colors such as red, blue, yellow, green, brown, black, and white, but it is preferably colorless and transparent in consideration of ease of recycling. 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 improve the barrier property of the container.

  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 provided with a gas barrier property and a light shielding property such as MXD6, MXD6 + fatty acid salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate). The preform 10a having three or more layers as the resin (intermediate layer) may be extrusion-molded and then blow-molded to form a multi-layer bottle having gas barrier properties and light-shielding properties. A resin obtained by blending the above-mentioned various resins may be used as the intermediate layer.

  Further, 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 molded, and this foamed preform is blow molded. By doing so, the container body 10 may be manufactured. Since such a container body 10 has foam cells built therein, it is possible to enhance the light-shielding property of the entire container body 10.

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

  Next, the plastic member 40 will be described. The plastic member 40 (40a) is provided so as to surround the outside of the preform 10a as described later, and is obtained by being adhered to the outside of the preform 10a and then biaxially stretch blow-molded together with the preform 10a. And has at least two colored layers containing a resin material and a colorant.

  Further, the plastic member 40 preferably has a visible light transmittance of 50% or less, more preferably 30% or less, and further preferably 10% or less. By setting the visible light transmittance of the plastic member 40 to 50% or less, it is possible to prevent the quality change of the content liquid filled in the composite container 10A. In the present specification, visible light refers to light having a wavelength of 380 nm to 800 nm. The visible light transmittance can be measured by a method according to JIS A5759. For example, using a spectrophotometer (manufactured by Shimadzu Corporation, UV3100), the light transmittance of visible light wavelength can be determined by measuring at 0.5 nm intervals in a wavelength range of 220 nm to 800 nm. Further, the visible light transmittance of 50% or less means that the transmittance is 50% or less in the entire visible wavelength region (380 nm to 800 nm).

  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 area in the circumferential direction so as to surround the container body 10, and has a substantially circular horizontal cross section.

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

  The plastic member 40 may be provided in the whole or a part of the container body 10 other than the mouth 11. For example, the plastic member 40 may be provided so as to cover the neck portion 13, the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10 except 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 the shoulder 12 and the outer surface of the 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 and removed from the container body 10. 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 in advance on the plastic member 40, and the plastic member 40 may be peeled along the cutting line. it can. As a result, the printed plastic member 40 can be separated and removed from the container body 10, so that the colorless and transparent container body 10 can be recycled as in the conventional case.

  Further, the thickness of the plastic member 40 is not limited to this, but may be, for example, about 5 μm to 50 μm in a state of being attached to the container body 10.

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

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

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

  The plastic member 40a includes at least two colored layers containing a resin material and a colorant, is attached to the outer surface of the preform 10a without being adhered, and moves or rotates with respect to the preform 10a. It is so close that it does not fall off, or so close that it does not fall by its own weight. The plastic member 40a is provided over the entire area in the 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 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 whole area or a partial area other than the mouth portion 11a. For example, the plastic member 40a may be provided so as to cover the whole of the body portion 20a and the bottom portion 30a except the mouth portion 11a. Further, the number of the plastic member 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 outside the body portion 20a.

  Such a plastic member 40a may or may not have a contracting action on the preform 10a. After blow molding, the plastic member 40a has a function of contracting with respect to the preform 10a from the viewpoint of less air entering between the container body 10 and the plastic member 40, that is, high adhesion. It is preferable that the object has a shrinkable tube.

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

  When the plastic member 40a has a function of contracting with respect to the preform 10a, the plastic member (shrink tube) 40a is provided outside the preform 10a and is heated integrally with the preform 10a. It is obtained by axial stretch blow molding. As such a plastic member (shrink tube) 40a, any member having a function of shrinking the preform 10a may be used. The plastic member (shrinkable tube) 40a may have shrinkability or elasticity by itself and can be shrunk without applying an external action. Alternatively, the plastic member (shrinkable tube) 40a may shrink (for example, heat shrink) with respect to the preform 10a when an external action (for example, heat) is applied.

  Each layer of the plastic member 40a is, for example, polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate. , Polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluorine resin, polymethylmethacrylate, polyacrylic acid, polymethylacrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene , Ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluoro rubber, nylon 6, nylon 6,6, nylon MXD6, aromatic polyamide, polycarbonate, polyterephthalate ethylene, polyterephthalate butylene, polynaphthalene ethylene , 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, phenol resin, urea resin, poly It can be produced by using a resin material containing ethylene oxide, polypropylene oxide, polyacetal, epoxy resin or the like as a main component. Of these, it is preferable to include a thermoplastic inelastic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or polyethylene naphthalate (PEN). Further, the resin material may include a copolymer obtained by polymerizing two or more monomer units constituting the above resin. Further, the resin material may include two or more kinds of the above resins. Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foamed member having a foamed cell diameter of 0.5 to 100 μm is used, and this foamed preform is molded. It is possible to improve the light blocking effect. The two or more colored layers included in the plastic member 40a may include the same resin material or different resin materials.

  The colored layer of the plastic member 40a contains at least a coloring agent in addition to the above resin material. As the colorant, a colorant such as brown, black, green, blue or red can be used. The colorant may be a pigment or a dye, but is preferably a pigment from the viewpoint of light resistance. Among the above-mentioned coloring agents, which are light-reflecting pigments, white pigments such as titanium white, aluminum powder, mica powder, zinc sulfide, zinc white, calcium carbonate, kaolin, and talc, which are light-absorbing pigments, carbon black, Colored pigments such as ceramic black and bone black are preferred. When the colored layer contains such a pigment, the visible light transmittance of the plastic member 40 after blow molding can be reduced, and the quality change of the content liquid filled in the composite container 10A can be prevented. can do.

  The content of the colorant in the colored layer is preferably 0.1 to 10 parts by mass, and more preferably 0.2 to 5 parts by mass with respect to 100 parts by mass of the resin material. Note that at least two or more colored layers included in the plastic member 40a may include the same colorant or different colorants. In a preferred embodiment, for example, the outermost colored layer contains a light-reflecting pigment, and the inner coloring layer contains a light-absorbing pigment. Further, by including a light absorbing pigment with a dark tint in the inner colored layer and a pigment with a good color development in the outer colored layer, the visible light transmittance is low, and the composite container is excellent in appearance. can do.

  Further, the plastic member 40 (40a) may contain various additives in addition to the above-mentioned resin material and colorant which are main components, as long as the characteristics thereof are not impaired. Examples of the additive include a plasticizer, an ultraviolet stabilizer, a coloring preventing agent, a matting agent, a deodorant, a flame retardant, a weatherproofing agent, an antistatic agent, a thread friction reducing agent, a slip agent, a release agent, and an antistatic agent. An oxidizing agent, an ion exchange agent, a coloring pigment, etc. can be added. Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foamed member having a foamed cell diameter of 0.5 to 100 μm is used, and this foamed preform is molded. It is possible to improve the light blocking effect.

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

  The plastic member 40 (40a) may include a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. For example, the colored layer may include a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property, and the plastic member 40 (40a) is a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. A layer made of may be provided separately from the colored layer. In this case, without using a multi-layer preform or a preform containing a blend material as the preform 10a, the gas barrier property of the composite container 10A is enhanced, oxygen is prevented from entering the container, and the content liquid is prevented from deteriorating. In addition, it is possible to prevent the evaporation of water vapor from the inside of the container to the outside and prevent the decrease of the internal volume. For example, a plastic member 40 may be provided in the entire area of the shoulder 12, neck 13, body 20, and bottom 30 of the container body 10 to enhance the gas barrier property of this portion. As such a material, it is considered that PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer), or an oxygen absorbent such as a fatty acid salt is mixed with these materials. Be done.

  Further, the plastic member 40 (40a) may include a material having a ray barrier property against ultraviolet rays and the like. For example, the colored layer may include a material having a light ray barrier property against ultraviolet rays or the like, and the plastic member 40 (40a) includes a layer made of a material having a light ray barrier property against ultraviolet rays or the like separately from the colored layer. It may be. In this case, without using a multi-layer preform or a preform containing a blend material as the preform 10a, it is possible to enhance the light barrier property of the composite container 10A and prevent the content liquid from being deteriorated by ultraviolet rays or the like. For example, the container body 10 may be provided with a plastic member 40a over the entire area of the shoulder 12, neck 13, body 20, and bottom 30 to enhance the ultraviolet barrier properties of this portion. As such a material, a blend material or a material in which a light-shielding resin is added to PET, PE, or PP can be considered. Further, 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 40 (40a) may include a material having a higher heat retention property or a lower heat retention property (a material having a lower thermal conductivity) than the plastic material forming the container body 10 (preform 10a). For example, the colored layer may include a material having a higher heat retention property or a lower heat retention property (a material having a lower thermal conductivity) than the plastic material forming the container body 10 (preform 10a), and the plastic member 40 (40a). ) May include a layer made of a material having a higher heat retention property or a lower heat retention property (a material having a lower heat conductivity) than the plastic material forming the container body 10 (preform 10a), separately from the coloring layer. For example, the plastic member 40 (40a) may be provided with a layer made of a material having a higher heat retention property or a lower heat retention property (a material having lower thermal conductivity) than the plastic material forming the container body 10 (preform 10a). good. In this case, it is possible to make it difficult for the temperature of the content liquid to be transmitted to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. Thereby, the heat retaining property or the cold retaining property of the composite container 10A is enhanced. For example, a plastic member 40 may be provided on all or part of the body portion 20 of the container body 10 to enhance the heat retaining property or the cold retaining property of the body portion 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 hot or too cold. Examples of such a material include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin and the like. Further, 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. Hollow particles are preferably mixed with a resin material containing these resins. The average particle diameter of the hollow particles is preferably 1 to 200 μm, more preferably 5 to 80 μm. The "average particle size" means the volume average particle size, and is measured by a known method using a particle size distribution / particle size distribution measuring device (for example, Nanotrac particle size distribution measuring device, manufactured by Nikkiso Co., Ltd.). can do. The hollow particles may be organic hollow particles composed of a resin or the like, or may be inorganic hollow particles composed of a glass or the like. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include styrene resins such as crosslinked styrene-acrylic resins, (meth) acrylic resins such as acrylonitrile-acrylic resins, phenolic resins, fluorine resins, polyamide resins, polyimides. Examples of the resin include a resin, a polycarbonate resin, and a polyether resin. In addition, low pake HP-1055, low pake HP-91, low pake OP-84J, low pake ultra, low pake SE, low pake ST (manufactured by Rohm and Haas Co., Ltd.), nipol MH-5055 (manufactured by Nippon Zeon Co., Ltd.), SX8782. Alternatively, commercially available hollow particles such as SX866 (manufactured by JSR Corporation) can be used. The content of the hollow particles is preferably 0.01 to 50 parts by mass, and more preferably 1 to 20 parts by mass with respect to 100 parts by mass of the resin material contained in the plastic member 40a.

  The plastic member 40 (40a) may include a material that is less slippery than the plastic material that forms the container body 10 (preform 10a). For example, the colored layer may include a material that is less slippery than the plastic material, and the plastic member 40 (40a) may be provided with a layer made of a material that is less slippery than the plastic material, separately from the colored layer. .. In this case, the user can easily hold the composite container 10A without changing the material of the container body 10. For example, a plastic member 40 may be provided on all or part of the body 20 of the container body 10 to facilitate holding the body 20.

  Further, the plastic member 40 (40a) may be designed or printed. In this case, it is possible to display an image or a character on the composite container 10A without separately adding a label or the like to the container body 10 after blow molding. For example, a plastic member 40 may be provided on all or part of the body 20 of the container body 10 to display images and characters on the body 20. The printing may be performed by designing or printing on the plain plastic member 40a by a printing method such as an inkjet method, a gravure printing method, an offset printing method, or a flexographic printing method. For example, in the case of using the inkjet method, the printing layer can be formed by applying the UV curable ink to the plastic member 40a, irradiating it with UV, and curing it. This printing may be performed on the plastic member (shrinkable tube) 40a before being attached to the preform 10a, or may be performed with the plastic member 40a provided on the outside of the preform 10a. Furthermore, the plastic member 40 of the composite container 10A after blow molding may be printed. The material of the plastic member 40 may be the same as that of the container body 10 or may be different from that of the container body 10.

  As described above, the plastic member 40a is composed of multiple layers including at least two colored layers. For example, even if the main components forming the innermost layer and the outermost layer are the same, they are different. May be. Specifically, as shown in FIG. 4, those of colored layer 43 / adhesive layer 44 / resin layer 45 / adhesive layer 44 / colored layer 43 (FIG. 4A), colored layer 43 / adhesive layer 44 / colored. The layer 43 (FIG. 4 (b)) and the like can be mentioned. More specific layer structure is, from the innermost surface, low-density PE + colorant (coloring layer) / adhesive layer / EVOH / adhesive layer / low-density PE +. Colorant (colored layer), PP + colorant (colored layer) / adhesive layer / EVOH / adhesive layer / PP + colorant (colored layer), low density PE + colorant (colored layer) / adhesive layer / low density Examples include PE + colorant (colored layer). As the adhesive constituting the adhesive layer, for example, polyvinyl acetate adhesive, polyacrylic ester adhesive, cyanoacrylate adhesive, ethylene copolymer adhesive, cellulose adhesive, polyester adhesive, Examples thereof include polyamide adhesives, polyimide adhesives, amino resin adhesives, phenol resin adhesives, epoxy adhesives, polyurethane adhesives, rubber adhesives and silicone adhesives.

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

  As shown in FIGS. 3 and 5 (a), the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. May be. In this case, since the bottom portion 42 of the plastic member 40a covers the bottom portion 30a of the preform 10a, various functions and characteristics can be given to the bottom portion 30 in addition to the body portion 20 of the composite container 10A. Examples of such a plastic member 40a include the blow tube and the sheet molding tube described above.

  Further, as shown in FIG. 10 (described later) and FIG. 5 (b), the plastic member 40a has a cylindrical shape (a 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 blow tube, the extrusion tube, the inflation molding tube, or the sheet molding tube described above can be used.

  Further, as shown in FIGS. 5C and 5D, the plastic member 40a may be manufactured by forming a sheet into a tubular shape and bonding the ends thereof. In this case, as shown in FIG. 5 (c), the plastic member 40a may have a tubular shape (a bottomless cylindrical shape) having a body portion 41, and as shown in FIG. 5 (d), The bottom portion 42 may be bonded to form a bottomed tubular shape. In this case, as the plastic member 40a, for example, a blow tube, an extruded tube, an inflation molded tube, or a sheet molded tube can be used.

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

  In one embodiment, the plastic member 40a can be manufactured by laminating resin sheets containing a resin material (laminated resin sheet) and then molding. Examples of the forming method include deep drawing, or a method of forming a resin sheet into a tubular shape and fusing or adhering the ends thereof. Two or more of the laminated resin sheets form a colored layer, that is, a resin sheet containing a coloring agent in addition to the resin material.

  In one embodiment, the plastic member 40a can also be manufactured by multi-layer extruding a heat-melted resin material into a tube shape. It is also possible to perform direct blow molding of a resin material extruded in multiple layers into a tube in a mold. The plastic member 40a can be obtained. In addition, in the multilayer extrusion step, at least two or more layers containing a colorant in addition to the resin material are extruded.

  The resin sheet can be manufactured by a conventionally known method. In the present invention, the extrusion molding is preferably used, and the extrusion molding is preferably performed by the T-die method or the inflation method.

  For example, the resin sheet can be molded by extrusion molding by the following method. After drying the above-mentioned resin material, it is supplied to a melt extruder heated to a temperature (Tm) higher than the melting point of the thermoplastic resin (Tm) to Tm + 70 ° C. to heat and melt the resin material, for example, a T-die. A resin sheet can be molded by extruding in a sheet shape from a die and rapidly cooling and solidifying the extruded sheet material with a rotating cooling drum or the like. As the melt extruder, a single-screw extruder, a twin-screw extruder, a vent extruder, a tandem extruder or the like can be used according to the purpose. The resin sheet forming the colored layer can be obtained by extruding a mixture of a resin material and a colorant.

In the inflation method, the heating temperature is preferably 170 to 230 ° C, more preferably 180 to 220 ° C, and the T die method is preferably 180 to 300 ° C, more preferably 210 to 270 ° C.
The above resin material is, for example, 0.3 to 30 g / 10 minutes, preferably 0.3 to 8 g / 10 minutes by the inflation method, 0.3 to 6 g / 10 minutes, and preferably 0.3 to 10 by the T-die method. It has a melt flow rate (MFR) of 20 g / 10 minutes, more preferably 4 to 15 g / 10 minutes. The melt flow rate is a value measured by the A method under the conditions of temperature 190 ° C. and load 21.18 N in the method specified in JIS K7210-1995. If the MFR of the resin material is 0.3 g / 10 minutes or more, the extrusion load during molding can be reduced. When the MFR of the resin material is 30 g / 10 minutes or less, the mechanical strength of the resin sheet made of the resin material can be increased.

  Next, the blow molding method (method for manufacturing 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. 6 (a)). In this case, the preform 10a may be manufactured by an injection molding method using, for example, an injection molding machine (not shown). Further, as the preform 10a, a preform generally used conventionally may be used.

  Next, by providing the plastic member 40a on the outer side of the preform 10a, a composite preform 70 having the preform 10a and the plastic member 40a adhered to the outer side of the preform 10a is manufactured (FIG. 6 ( See b)). In this case, the plastic member 40 a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member 40a is attached so as to cover the entire region of the body portion 20a except the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  In this case, a plastic member 40a having an inner diameter that is the same as or slightly smaller than the outer diameter of the preform 10a may be pushed into the preform 10a so as to be in close contact with the outer surface of the preform 10a. Alternatively, as 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. May be closely attached to.

  In this way, the plastic member 40a is closely attached to the outside of the preform 10a in advance and the composite preform 70 is prepared in advance, whereby a series of steps for preparing the composite preform 70 (FIGS. 6A to 6B). )) And a series of steps for manufacturing the composite container 10A by blow molding (FIGS. 6 (c) to 6 (f)) can be performed at different places (factory or the like).

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 6C). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow molding die 50 (see FIG. 6D).

  The composite container 10A is molded using this blow molding die 50. In this case, the blow molding die 50 is composed of a pair of body portion dies 50a and 50b and a bottom portion die 50c which are divided from each other (see FIG. 6D). In FIG. 6D, the pair of body dies 50a and 50b are open from each other, and the bottom die 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. 6 (e), after the bottom die 50c is lowered, the pair of body dies 50a and 50b are closed and sealed by the pair of body dies 50a and 50b and the bottom die 50c. The blow molding die 50 is formed. Next, air is pressed into the preform 10a, and the composite preform 70 is biaxially stretch blow molded.

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

  In this way, the composite container 10A including the container body 10 and the plastic member 40 provided on the outer surface of the container body 10 is obtained.

  Next, as shown in FIG. 6F, the pair of body dies 50a and 50b and the bottom die 50c are separated from each other, and the composite container 10A is taken out from the blow molding die 50.

Modified Example of Blow Molding Method Next, a modified example of the blow molding method (method for manufacturing the composite container 10A) according to the present embodiment will be described with reference to FIGS. The modified example shown in FIGS. 7A to 7F is one in which the plastic member (shrinkable tube) 40a has a function of shrinking with respect to the preform 10a, and other configurations are shown in FIGS. It is substantially the same as the form shown in (f). 7A to 7F, the same parts as those in FIGS. 6A to 6F are designated by the same reference numerals and detailed description thereof will be omitted.

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

  Next, a plastic member (shrinkable tube) 40a is provided on the outside of the preform 10a (see FIG. 7B). In this case, the plastic member (shrinkable tube) 40 a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member (shrinkable tube) 40 is attached so as to cover the entire region of the body portion 20a except the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  Next, the preform 10a and the plastic member (shrinkable tube) 40a are heated by the heating device 51 (see FIG. 7C). At this time, the preform 10a and the plastic member (shrinkable tube) 40a are evenly heated in the circumferential direction by the heating device 51 while rotating with the mouth 11a facing downward. The heating temperature of the preform 10a and the plastic member (shrinkable tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  By heating the plastic member (shrinkable tube) 40a in this manner, the plastic member (shrinkable tube) 40a is thermally shrunk and adheres to the outside of the preform 10a (see FIG. 7C). In addition, when the plastic member (shrinkable tube) 40a itself has shrinkability, the plastic member (shrinkable tube) shrinks at the time when the plastic member (shrinkable tube) 40a is provided outside the preform 10a (see FIG. 7B). The tube 40a may be in close contact with the outside of the preform 10a.

  Then, the preform 10a and the plastic member (shrinkable tube) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 7D).

  The preform 10a and the plastic member (shrinkable tube) 40a are molded using this blow molding die 50, and in the same manner as in the case of FIGS. 6A to 6F described above, the container body 10 and A composite container 10A including a plastic member (shrinkable tube) 40 provided on the outer surface of the container body 10 is obtained (see FIGS. 7D to 7F).

  Next, another modification of the blow molding method (method for manufacturing the composite container 10A) according to the present embodiment will be described with reference to FIGS. In the modified example shown in FIGS. 8A to 8G, the plastic member (shrinkable tube) 40a has a function of shrinking with respect to the preform 10a, and the preform 10a and the plastic member (shrinkable tube) 40a have two shapes. The heating is performed in stages, and other configurations are substantially the same as those shown in FIGS. 6 (a) to 6 (f). 8A to 8G, the same parts as those in FIGS. 6A to 6F are designated by the same reference numerals and detailed description thereof will be omitted.

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

  Next, a plastic member (shrinkable tube) 40a is provided on the outside of the preform 10a (see FIG. 8B). In this case, the plastic member (shrinkable tube) 40 a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member (shrinkable tube) 40 is attached so as to cover the entire region of the body portion 20a except the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  Next, the preform 10a and the plastic member (shrinkable tube) 40a are heated by the first heating device 55 (see FIG. 8C). At this time, the heating temperature of the preform 10a and the plastic member (shrinkable tube) 40a may be, for example, 50 ° C to 100 ° C.

  By heating the plastic member (shrinkable tube) 40a, the plastic member (shrinkable tube) 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 (contractile tube) 40a that is adhered to the outside of the preform 10a is obtained (see FIG. 8C).

  As described above, the composite preform 70 is prepared by preliminarily heating and closely adhering the plastic member (shrinkable tube) 40a to the outside of the preform 10a using the first heating device 55. A series of steps for manufacturing (FIGS. 8A to 8C) and a series of steps for manufacturing the composite container 10A by blow molding (FIGS. 8D to 8G) are provided at different places (factory or the like). Can be implemented in.

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 8D). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member (shrinkable tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 8E).

  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. 6A to 6F described above. The composite container 10A including the contracted tube (contracted tube) 40 is obtained (see FIGS. 8E to 8G).

  As described above, according to the present embodiment, by performing blow molding on the composite preform 70 in the blow molding die 50, the preform 10a of the composite preform 70 and the plastic member 40a are integrated. As a result, the composite container 10A including the container body 10 and the plastic member 40 is produced. Accordingly, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be configured as separate members. Therefore, various functions and characteristics can be freely added to the composite container 10A by appropriately selecting the type and shape of the plastic member 40.

  Further, according to the present embodiment, when the composite container 10A is manufactured, a general blow molding device can be used as it is, so that it is necessary to prepare new molding equipment for manufacturing the composite container 10A. Absent.

  Further, according to the present embodiment, since the plastic member 40 includes at least two or more colored layers containing the resin material and the colorant, the visible light transmittance of the plastic member 40 can be reduced. Therefore, it is possible to prevent the problem that the content liquid filled in the composite container 10A is denatured by visible light.

Modification Example Next, a modification example of the first embodiment of the present invention will be described with reference to FIGS. 9, 10 and 11A to 11F.

  The modified examples shown in FIGS. 9, 10 and 11A to 11F use a cylindrical plastic member 40a instead of a plastic member 40a having a body and a bottom. ..

  In the composite container 10A shown in FIG. 9, the plastic member 40 extends from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but does not reach the bottom portion 30. Further, in the composite preform 70 shown in FIG. 10, the plastic member 40a is adhered so as to cover only the body portion 20a of the preform 10a, and more specifically, the neck portion 13 of the container body 10 of the body portion 20a. Covers a region excluding a portion 13a corresponding to the above and a portion corresponding to a lower portion of the body portion 20a.

  Other configurations in FIGS. 9, 10 and 11A to 11F are substantially the same as those of the embodiment shown in FIGS. 1 to 8. In the modified examples shown in FIGS. 9, 10 and 11A to 11F, the same parts as those of the embodiment shown in FIGS. 1 to 8 are denoted by the same reference numerals and detailed description thereof will be omitted.

  In addition, 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 8, and thus detailed description thereof will be omitted. In addition, in FIGS. 9, 10 and 11A to 11F, a plastic member 40 having a function of contracting with respect to the preform 10a may be used.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. 12 to 21 are views showing a second embodiment of the present invention. 12 to 21, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

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

  As will be described later, the composite container 10A shown in FIGS. 12 and 13 is a composite preform 70 (see FIG. 14) including a preform 10a, an inner label member 60a and a plastic member 40a using a blow molding die 50. By biaxially stretch blow molding, the preform 10a of the composite preform 70, the inner label member 60a, and the plastic member 40a are integrally expanded and obtained.

  Such a composite container 10A is provided inside a container body 10 made of a plastic material, an inside label member 60 closely attached to the outside of the container body 10, and an outside label of the inside label member 60. And a plastic member 40 that has been formed.

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

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

  Further, the plastic member 40 is in close contact with the outer surface of the container body 10 and the outer surface of the inner label member 60 in a thinly extended state, so that the plastic member 40 does not move or rotate easily with respect to the container body 10. And has at least two or more colored layers.

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

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

  The inner label member 60 is attached to the outer surface of the container body 10 without being adhered, and is in close contact with the container body 10 so as not to move or rotate. The inner label member 60 is thinly stretched on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 13, the inner label member 60 is provided over the entire circumferential direction so as to surround the container body 10 and has a substantially circular horizontal cross section.

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

  The inner label member 60 may be provided in the whole or a part of the container body 10 other than the mouth portion 11. For example, the inner label member 60 may be provided so as to cover the neck portion 13, the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10 except the mouth portion 11. Further, 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.

  The thickness of the inner label member 60 is not limited to this, but may be, for example, about 5 μm to 50 μm in the state of being attached to the container body 10.

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

  The plastic member 40 is attached to the outer surface of the inner label member 60 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 inner label member 60 to cover the inner label member 60. As shown in FIG. 13, 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 addition, the configurations of the container body 10 and the plastic member 40 are substantially the same as those in the case of the above-described first embodiment, and thus detailed description thereof will be omitted here.

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

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

  The inner label member 60a is in close contact with the outer surface of the preform 10a, and is in close contact with the preform 10a without easily moving or rotating. The inner label member 60a is provided over the entire area in the circumferential direction so as to surround the preform 10a and has a substantially circular horizontal cross section.

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

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

  Further, various materials described below can be used as the inner label member 60a.

  For example, the inner label member 60a may be made of a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. In this case, without using a multi-layer preform or a preform containing a blend material as the preform 10a, it is possible to enhance the gas barrier property of the composite container 10A and prevent the content liquid from being deteriorated by oxygen or water vapor. As such a material, it is considered that PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer), or an oxygen absorbent such as a fatty acid salt is mixed with these materials. Be done.

  The inner label member 60a may be made of a material having a light barrier property against ultraviolet rays and the like. In this case, without using a multi-layer preform or a preform containing a blend material as the preform 10a, the light barrier property of the composite container 10A is enhanced, oxygen is prevented from entering the container, and the content liquid is prevented from deteriorating. In addition, it is possible to prevent vaporization of water vapor from the inside of the container to the outside, and to prevent the internal volume from decreasing. As such a material, a blend material or a material in which a light-shielding resin is added to PET, PE, or PP can be considered.

  The inner label member 60a may be made of a material having a higher heat retention property or a lower heat retention 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 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 heat retaining property or the cold retaining property of the composite container 10A is enhanced. Examples of such a material include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin and the like. Furthermore, it is preferable to comprise hollow particles. The average particle diameter of the hollow particles is preferably 1 to 200 μm, more preferably 5 to 80 μm. The hollow particles may be organic hollow particles composed of a resin or the like, or may be inorganic hollow particles composed of a glass or the like. Hollow particles are preferred. As the resin constituting the organic hollow particles, the same resins as those mentioned above can be mentioned. Further, the commercially available hollow particles can also be used. The content of the hollow particles is preferably 0.01 to 50 parts by mass, and more preferably 1 to 20 parts by mass with respect to 100 parts by mass of the resin contained in the inner label member 60a.

  On the other hand, the plastic member 40a is provided with at least two colored layers, is attached to the outer surface of the inner label member 60a without being adhered, and is closely attached to the preform 10a so as not to move or rotate. ing. The plastic member 40a is provided over the entire area in the circumferential direction so as to surround the preform 10a and has a substantially circular horizontal cross section.

  In this case, the inner label member 60a and the plastic member 40a are provided so as to cover the entire region of the body portion 20a except the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  The inner label member 60a and the plastic member 40a may be provided in the whole area or a partial area other than the mouth portion 11a. For example, the inner label member 60a and the plastic member 40a may be provided so as to cover the entire body portion 20a and the bottom portion 30a except the mouth portion 11a. Further, each of the inner label member 60a and the plastic member 40a is not limited to one, but a plurality of members may be provided. For example, the two inner label members 60a and the plastic member 40a may be provided at two positions outside the body portion 20a.

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

  In the latter case, the plastic member (shrink tube) 40a may be any member that has a function of shrinking the preform 10a. As the plastic member (shrink tube) 40a, it is preferable to use a member that shrinks (for example, heat shrinks) with respect to the preform 10a when an external action (for example, heat) is applied.

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

  Next, the shapes of the plastic member 40a and / or the inner label member 60a will be described.

  As shown in FIGS. 14 and 15 (a), the plastic member 40a (inner label member 60a) has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 (body portion 61) and a body portion 41. You may have the bottom part 42 (bottom part 62) connected to the (body part 61). In this case, since the bottom portion 42 (bottom portion 62) of the plastic member 40a (inner label member 60a) covers the bottom portion 30a of the preform 10a, various functions are performed for the bottom portion 30 as well as the body portion 20 of the composite container 10A. And characteristics can be imparted.

  Further, as shown in FIG. 20 (described later) and FIG. 15 (b), the plastic member 40 a (inner label member 60 a) has a cylindrical shape (a bottomless cylindrical shape) as a whole, and has a cylindrical body portion 41. It may have a (body portion 61). In this case, for example, an extruded tube can be used as the plastic member 40a (inner label member 60a).

  Further, as shown in FIGS. 15 (c) and 15 (d), the plastic member 40a (inner label member 60a) may be produced by forming a film into a tubular shape and bonding the ends thereof. good. In this case, as shown in FIG. 15C, the plastic member 40a may have a tubular shape (a bottomless cylindrical shape) having a body portion 41 (body portion 61), and FIG. As shown in, the bottom portion 42 (bottom portion 62) may be bonded to form a bottomed tubular shape.

  Next, the blow molding method (method for manufacturing 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. 16 (a)).

  Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member 40a is provided on the outer side of the inner label member 60a. As a result, a composite preform 70 having the preform 10a, the inner label member 60a adhered to the outside of the preform 10a, and the plastic member 40a adhered to the outside of the inner label member 60a is produced (FIG. 16). (See (b)). In this case, the inner label member 60 a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

  At this time, even if the inner label member 60a and the plastic member 40a having the same inner diameter as or slightly smaller than the outer diameter of the preform 10a are pressed into the preform 10a, the inner label member 60a and the plastic member 40a can be closely attached to the outer surface of the preform 10a. good. Alternatively, a heat-shrinkable inner label member 60a and a plastic member 40a are provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a are heated to 50 ° C. to 100 ° C. to heat-shrink. It may be closely attached to the outer surface of the preform 10a.

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

  In this way, a series of steps for producing the composite preform 70 by preliminarily adhering the plastic member 40a to the outsides of the preform 10a and the inner label member 60a to produce the composite preform 70 (see FIG. 16 ( It is possible to carry out a) to (b)) and a series of steps (FIGS. 16D to 16F) for producing the composite container 10A by blow molding at different places (factory etc.).

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

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow molding die 50. The composite container 10A is molded using the blow molding die 50, and in substantially the same manner as in the case of the first embodiment described above, the container body 10 and the inner label member provided on the outer surface of the container body 10. A composite container 10A including 60 and the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 16D to 16F).

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

Modified Example of Blow Molding Method Next, a modified example of the blow molding method (method for manufacturing the composite container 10A) according to the present embodiment will be described with reference to FIGS. The modified example shown in FIGS. 17A to 17F is one in which the plastic member (contractile tube) 40a has a function of contracting with respect to the preform 10a, and other configurations are shown in FIGS. It is substantially the same as the form shown in (f). 17A to 17F, the same parts as those in FIGS. 16A to 16F are designated by the same reference numerals and detailed description thereof will be omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 17 (a)).

  Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member (shrinkable tube) 40a is provided on the outer side of the inner label member 60 (see FIG. 17B). The inner label member 60a and the plastic member (shrinkable tube) 40a are attached so as to cover the entire region of the body portion 20a except the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a. At least a part of the plastic member (shrinkable tube) 40a may be translucent or transparent.

  In this case, a plastic member (shrinkable tube) 40a is provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (shrinkable tube) 40a are integrally attached to the outside of the preform 10a. Is also good. Alternatively, the inner label member 60a may be provided on the outer side of the preform 10a, and then the plastic member (shrinkable tube) 40a may be provided on the outer side of the inner label member 60.

  Next, the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a are heated by the heating device 51 (see FIG. 17C). At this time, the preform 10a, the inner label member 60a, and the plastic member (contractile tube) 40a are uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  By heating the plastic member (shrinkable tube) 40a in this manner, the plastic member (shrinkable tube) 40a is heat-shrinked and adheres to the outside of the preform 10a (see FIG. 17C). If the plastic member (shrinkable tube) 40a itself has shrinkability, the plastic member (shrinkable tube) 40a is provided outside the inner label member 60a (see FIG. 17B) at the time when the plastic member (shrinkable tube) 40a is provided. The contraction tube) 40a may be in close contact with the outside of the inner label member 60a.

  Then, the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 17D).

  The preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a are molded using this blow molding die 50, and in substantially the same manner as in the case of FIGS. 16 (a) to (f) described above, A composite container 10A including the container body 10, an inner label member 60 provided on the outer surface of the container body 10, and a plastic member (shrinkable tube) 40 provided on the outer side of the inner label member 60 is obtained (FIG. 17 (d)-(f)).

  Next, another modification of the blow molding method (method for manufacturing the composite container 10A) according to the present embodiment will be described with reference to FIGS. 18A to 18G, the plastic member (shrinkable tube) 40a has a function of shrinking with respect to the preform 10a, and the preform 10a and the plastic member (shrinkable tube) 40a have two shapes. The heating is performed in stages, and other configurations are substantially the same as the configurations shown in FIGS. 16 (a) to 16 (f). 18A to 18G, the same parts as those in FIGS. 16A to 16F are designated by the same reference numerals and detailed description thereof will be omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 18 (a)).

  Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member (shrinkable tube) 40a is provided on the outer side of the inner label member 60a (see FIG. 18B). The plastic member (shrinkable tube) 40a is attached so as to cover the entire region of the body portion 20a except the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a. At least a part of the plastic member (shrinkable tube) 40a may be semitransparent or transparent.

  In this case, a plastic member (shrinkable tube) 40a is provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (shrinkable tube) 40a are integrally attached to the outside of the preform 10a. Is also good. Alternatively, the inner label member 60a may be provided on the outer side of the preform 10a, and then the plastic member (shrink tube) 40a may be provided on the outer side of the inner label member 60a.

  Next, the preform 10a, the inner label member 60a, and the plastic member (contractile tube) 40a are heated by the first heating device 55 (see FIG. 18C). At this time, the heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a may be, for example, 50 ° C to 100 ° C.

  By heating the plastic member (shrinkable tube) 40a, the plastic member (shrinkable tube) 40a is thermally shrunk and adheres to the outside of the preform 10a. Thereby, the composite preform 70 having the preform 10a, the inner label member 60a adhered to the outer side of the preform 10a, and the plastic member (shrink tube) 40a adhered to the outer side of the inner label member 60a is obtained. (See FIG. 18C).

  In this manner, by using the first heating device 55 to heat and closely adhere the plastic member (shrinkable tube) 40a to the outside of the preform 10a and the inner label member 60a in advance, the composite preform 70 is produced. A series of steps for manufacturing the composite preform 70 (FIGS. 18A to 18C) and a series of steps for manufacturing the composite container 10A by blow molding (FIGS. 18D to 18G) are separately performed. It becomes possible to carry out at a place (factory etc.).

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 18D). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrinkable tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

  Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 18 (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. The composite container 10A including the inner label member 60 and the plastic member (shrinkable tube) 40 provided on the outer side of the inner label member 60 is obtained (see FIGS. 18E to 18G).

As described above, according to the present embodiment, by performing blow molding on the composite preform 70 in the blow molding die 50, the preform 10a of the composite preform 70, the inner label member 60a, and the plastic. The manufacturing member 40a is integrally expanded to produce a composite container 10A including the container body 10, the inner label member 60, and the plastic member 40. Therefore, at the stage of manufacturing the composite container 10A using the preform 10a, the inner label member 60 can be provided in advance in the composite container 10A. Therefore, it is not necessary to provide a step of applying a label by the labeler after the composite container 10A is filled with the content liquid and hermetically sealed. Thereby, the manufacturing cost for manufacturing the final product can be suppressed.
Further, it is possible to prevent the yield from being reduced when the final product is manufactured due to a malfunction of the labeler or the like.

  Further, according to the present embodiment, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be configured as separate members. Therefore, various functions and characteristics can be freely added to the composite container 10A by appropriately selecting the type and shape of the plastic member 40.

  Further, according to the present embodiment, when the composite container 10A is manufactured, a general blow molding device can be used as it is, so that it is necessary to prepare new molding equipment for manufacturing the composite container 10A. Absent.

Modified Example Next, a modified example of the present invention will be described with reference to FIGS. 19, 20 and 21A to 21F.

  The modified examples shown in FIGS. 19, 20 and 21 (a) to (f) do not have the body portion and the bottom portion as the inner label member 60a and the plastic member 40a, but have a cylindrical inner label member 60a and The plastic member 40a is used.

  In the composite container 10A shown in FIG. 19, the inner label member 60 and the plastic member 40 extend from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but do not reach the bottom portion 30. Further, in the composite preform 70 shown in FIG. 20, the inner label member 60a and the plastic member 40a are adhered so as to cover only the body portion 20a of the preform 10a. It covers a region of the main body 10 excluding a portion 13a corresponding to the neck portion 13 and a lower portion of the body portion 20a.

  Other configurations in FIGS. 19, 20 and 21A to 21F are substantially the same as those of the embodiment shown in FIGS. 12 to 16. In the modified examples shown in FIGS. 19, 20 and 21 (a) to 21 (f), the same parts as those of the embodiment shown in FIGS. 12 to 16 are designated by the same reference numerals, and detailed description thereof will be omitted.

  In addition, the structure and manufacturing method of the composite container 10A and the structure and manufacturing method of the composite preform 70 are substantially the same as those of the embodiment shown in FIGS. 12 to 16, and thus detailed description thereof will be omitted. In addition, in FIGS. 19, 20 and 21 (a) to (f), a plastic member 40 having a function of contracting with respect to the preform 10a may be used.

Claims (12)

In a composite container,
A container body made of plastic material,
A plastic member on the outer surface of the container body,
The container body and the plastic member are integrally expanded by blow molding,
The plastic member includes at least two colored layers containing a resin material and a coloring agent,
A composite container, wherein the plastic member has a visible light transmittance of 50% or less.   Content of the said coloring agent in the said colored layer is 0.1-10 mass parts with respect to 100 mass parts of the said resin materials, The composite container of Claim 1 characterized by the above-mentioned.   3. The composite container according to claim 1, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment. In the method of manufacturing a composite container,
A step of preparing a preform made of a plastic material,
By providing a plastic member so as to surround the outside of the preform, a step of producing a composite preform having the preform and the plastic member adhered to the outside of the preform,
Heating the composite preform and inserting it into a blow mold,
By subjecting the composite preform to blow molding in the blow molding die, the preform of the composite preform and the step of expanding the plastic member integrally,
The plastic member has at least two colored layers containing a resin material and a coloring agent,
A method for manufacturing a composite container, wherein the plastic member has a visible light transmittance of 50% or less.   Content of the said coloring agent in the said colored layer is 0.1-10 mass parts with respect to 100 mass parts of the said resin materials, The manufacturing method of the composite container of Claim 4 characterized by the above-mentioned.   The method for producing a composite container according to claim 4, wherein at least one layer of the colored layers contains a light-reflecting pigment or a light-absorbing pigment. For manufacturing a composite container having a preform and a plastic member adhered to the outside of the preform by being attached so as to surround the outside of the preform and being heated integrally with the preform. A plastic member,
At least having a tubular body that covers the body of the preform,
At least two colored layers containing a resin material and a colorant are provided,
A plastic member having a visible light transmittance of 50% or less.   Content of the said coloring agent in the said colored layer is 0.1-10 mass parts with respect to 100 mass parts of the said resin materials, The plastic member of Claim 7 characterized by the above-mentioned.   9. The plastic member according to claim 7, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment. In the composite preform,
A preform made of plastic material,
A plastic member provided so as to surround the outside of the preform,
The plastic member is adhered to the outside of the preform,
The plastic member includes at least two colored layers containing a resin material and a coloring agent,
A composite preform, wherein the plastic member has a visible light transmittance of 50% or less.   The composite preform according to claim 10, wherein the content of the colorant in the colored layer is 0.1 to 10 parts by mass with respect to 100 parts by mass of the resin material.   12. The composite preform according to claim 10, wherein at least one of the colored layers contains a light-reflecting pigment or a light-absorbing pigment.

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