JP6458482B2 - Composite container manufacturing method, composite preform, composite container, and plastic member - Google Patents

Description

  The present invention relates to a composite container manufacturing method, a composite preform, a composite container, 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. In particular, it is difficult to have different functions and characteristics depending on the part of the container (for example, the trunk and 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 manufacturing method, a composite preform, a composite container, and a plastic member. The purpose is to provide.

  The present invention includes a step of preparing a preform made of a plastic material, a step of providing a plastic member composed of a plurality of layers outside the preform, and a blow to the preform and the plastic member. And a step of inflating the preform and the plastic member together by molding, and at least one of the plurality of layers of the plastic member is a colored layer. It is a manufacturing method of a container.

  According to the present invention, the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer, and the outer surface layer, the intermediate layer, and / or the inner surface layer are the colored layers. It is a manufacturing method.

  The present invention is the method for manufacturing a composite container, wherein the plastic member has an action of contracting with respect to the preform.

  The present invention includes a preform made of a plastic material and a plastic member provided on the outer side of the preform and configured by a plurality of layers, and the plastic member is in close contact with the outer side of the preform. And at least one of the plurality of layers of the plastic member is a colored layer.

  The plastic member may include an outer surface layer, an intermediate layer, and an inner surface layer, and the outer surface layer, the intermediate layer, and / or the inner surface layer may be the colored layer. It is a reform.

  The present invention is the composite preform, wherein the plastic member has a function of contracting with respect to the preform.

  The present invention includes a container body made of a plastic material and a plastic member that is provided in close contact with the outside of the container body and includes a plurality of layers. The container body and the plastic member are formed by blow molding. The composite container is characterized in that it is inflated as a whole and at least one of the plurality of layers of the plastic member is a colored layer.

  According to the present invention, the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer, and the outer surface layer, the intermediate layer, and / or the inner surface layer are the colored layers. It is.

  The present invention is the composite container, wherein the plastic member has a contracting action.

  The present invention is a composite container having the preform and a plastic member in close contact with the outside of the preform by being mounted on the outside of the preform made of a plastic material and being expanded together with the preform. A plastic member for manufacturing a plastic member, comprising a plurality of layers, wherein at least one of the plurality of layers is a colored layer.

  According to the present invention, the preform of the composite preform and the plastic member are expanded integrally by performing blow molding on the composite preform in the blow mold. For this reason, the preform (container body) and the plastic member can be formed of different members, and various functions and characteristics can be imparted to the composite container by appropriately selecting the type and shape of the plastic member. it can.

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 vertical sectional view showing the composite preform according to the first embodiment of the present invention. 4A to 4D are perspective views showing various plastic members. FIGS. 5A to 5F are schematic views showing a blow molding method according to the first embodiment of the present invention. FIGS. 6A to 6F are schematic views showing a blow molding method according to a modification of the first embodiment of the present invention. 7A to 7G are schematic views showing a blow molding method according to a modification of the first embodiment of the present invention. FIG. 8 is a partial vertical sectional view showing a modification of the composite container according to the first embodiment of the present invention. FIG. 9 is a vertical sectional view showing a modification of the composite preform according to the first embodiment of the present invention. FIGS. 10A to 10F are schematic views showing a modification of the blow molding method according to the first embodiment of the present invention. FIG. 11 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 12 is a horizontal sectional view (cross-sectional view taken along line XII-XII in FIG. 11) showing a composite container according to the second embodiment of the present invention. FIG. 13 is a vertical sectional view showing a composite preform according to the second embodiment of the present invention. FIGS. 14A to 14D are perspective views showing various inner label members and various plastic members. FIGS. 15A to 15F are schematic views showing a blow molding method according to a second embodiment of the present invention. 16 (a) to 16 (f) are schematic views showing a blow molding method according to a modification of the second embodiment of the present invention. FIGS. 17A to 17G are schematic views showing a blow molding method according to a modification of the second embodiment of the present invention. FIG. 18 is a partial vertical sectional view showing a modification of the composite container according to the second embodiment of the present invention. FIG. 19 is a vertical sectional view showing a modification of the composite preform according to the second embodiment of the present invention. 20 (a) to 20 (f) are schematic views showing a modification 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 produced 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” refer to the upper side and the lower side in a state where the composite container 10A is erected (FIG. 1), respectively.

  A composite container 10A shown in FIG. 1 and FIG. 2 is composed of a preform 10a and a plurality of layers using a blow molding die 50, and at least one of the plurality of layers is a colored layer, as will be described later. The composite preform 70 including the member 40a (see FIG. 3) is obtained by biaxially stretching blow molding to expand the preform 10a of the composite preform 70 and the plastic member 40a integrally. It is.

  Such a composite container 10A is composed of a container body 10 made of a plastic material located inside and a plurality of layers provided in close contact with the outside of the container body 10, and at least one of the plurality of layers is at least one layer. And a plastic member 40 which is a colored layer.

  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 body 10 in a thinly extended state, and is attached to the container 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. Moreover, you may blend and use the various resin mentioned above. 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. 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). As a resin (intermediate layer) having a preform 10a composed of three or more layers, it may be formed as a multilayer bottle having gas barrier properties and light-shielding properties by blow molding after extrusion. 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. The plastic member 40 (40a) is composed of a plurality of layers, and at least one of these layers is a colored layer. Further, the plastic member 40 (40a) is provided so as to surround the outer side of the preform 10a as will be described later, and after being in close contact with the outer side of the preform 10a, biaxial stretch blow molding is performed together with the preform 10a. Is obtained.

  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.

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

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

  Such a plastic member 40a may be one that does not have a contracting action on the preform 10a or may have a contracting action. 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 and the plastic member 40, that is, high adhesion. It is preferable that it is a thing (shrinkable tube).

  When the plastic member 40a has a function of contracting with respect to the preform 10a, the plastic member (outer contracting member) 40a is provided outside the preform 10a and is heated integrally with the preform 10a. It is obtained by biaxial stretch blow molding. As such a plastic member (outer contraction member) 40a, any member having an action of contracting with respect to the preform 10a may be used. The plastic member (outer contraction member) 40a itself may be contractible or elastic and can contract without applying an external action. Alternatively, the plastic member (outer contraction member) 40a may contract (for example, heat shrink) with respect to the preform 10a when an external action (for example, heat) is applied.

  Moreover, the thickness of the plastic member 40a is not limited to this, but can be set to, for example, about 5 μm to 50 μm in a state of being attached to the container body 10. The thickness of the colored layer is preferably 0.1 μm or more, and more preferably 2 μm or more.

  As described above, the plastic member 40 (40a) is composed of a plurality of layers, and is preferably composed of an outer surface layer, an intermediate layer, and an inner surface layer. In addition, as described above, in the plastic member 40 (40a), at least one of the plurality of layers is a colored layer. Moreover, the resin material which forms the layer of an innermost surface and an outermost surface may be the same, or may differ. Specifically, low density PE + colorant (colored 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 PE + colorant (colored layer), and the like. In addition to these, a colorant can be contained in the adhesive layer so as to function as a colored layer. Examples of the adhesive constituting the adhesive layer include a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a 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 structure of the composite preform according to this embodiment will be described with reference to FIG.

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

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

  The plastic member 40a is composed of a plurality of layers, at least one of which is a colored layer, and is attached without being adhered to the outer surface of the preform 10a, and is in close contact with the preform 10a so as not to move or rotate. It is in close contact to the extent that it does not fall due to 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 entire body portion 20a and the bottom portion 30a except for the mouth portion 11a. Furthermore, the number of plastic members 40a is not limited to one, and a plurality of plastic members 40a may be provided. For example, two plastic members 40a may be provided at two locations outside the trunk portion 20a.

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

  In the former case, the plastic member 40a is obtained, for example, by a blow tube produced by blow molding, a sheet molded tube produced by sheet forming such as deep drawing, an extruded tube produced by extrusion molding, or an inflation method. However, the present invention is not limited to this, and a molding method other than those described above may be used.

  On the other hand, when the plastic member (outer contraction member) 40a has an action of contracting, the plastic member (outer contraction member) 40a is applied to the preform 10a when an external action (for example, heat) is applied, for example. What shrinks | contracts with respect (for example, heat shrink) may be used. Alternatively, the plastic member (outer contraction member) 40 itself may be contractible or elastic and can contract without applying an external action.

  Examples of the resin material that can be used for producing each layer of the plastic member 40 (40a) include polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, and ABS tree. Umami, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, polyacrylonitrile, poly Acrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluoro rubber, nylon 6, nylon Ron 6,6, nylon MXD6, aromatic polyamide, polycarbonate, ethylene polyterephthalate, polybutylene terephthalate, ethylene polynaphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyether ketone, polyether ether ketone, unsaturated Polyester, alkyd resin, polyimide, polysulfone, polyphenylene sulfide, polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, epoxy resin and the like can be included. Among these, it is preferable to comprise thermoplastic inelastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). In particular, as the resin used for producing the colored layer, PE, PP, and PET are preferable, and PE is more preferable because of versatility. The resin material may include a copolymer obtained by polymerizing two or more monomer units constituting the above-described resin. Furthermore, the resin material may comprise two or more of the above-described resins. 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 colored layer constituting the plastic member 40 (40a) can include a resin material and a colorant. The content of the colorant in the colored layer is preferably 0.01 to 10% by mass and more preferably 0.1 to 3.0% by mass with respect to the total amount of the resin material contained in the colored layer. Preferably, it is 0.5-2.0 mass%. If content of a coloring agent is in the said numerical range, the change of the resin performance of a colored layer can be suppressed as much as possible, and a color tone can be shape | molded stably.

  As the colorant, a colorant such as brown, black, green, white, 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 colorants described above, light reflecting pigments such as titanium white, aluminum powder, mica powder, zinc sulfide, zinc white, calcium carbonate, kaolin, talc and other white pigments, light absorbing pigments, carbon black, Colored pigments such as ceramic black and bone black are preferred. By including such pigments in the colored layer, it is possible to reduce the visible light transmittance of the plastic member 40 after blow molding, and to prevent a change in the quality of the content liquid filled in the composite container 10A. can do.

  The plastic member 40a may include a layer made of the same material as the container body 10 (preform 10a). For example, the colored layer may contain the same material as the container body 10 (preform 10a), and the plastic member 40 (40a) is 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 including the layer can be disposed mainly on the 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. Such a layer is preferably provided as an inner surface layer of the plastic member 40a. 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 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 contain 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 multilayer preform or a preform containing a blend material as the preform 10a, the gas barrier property of the composite container 10A is improved, the content liquid is prevented from being deteriorated by oxygen, and the internal volume is increased by the evaporation of water vapor. Can be prevented from decreasing. For example, a plastic member 40 may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and the bottom portion 30 of the container body 10, and the gas barrier property of this portion may be improved. Such a layer is preferably provided as an inner surface layer of the plastic member 40a. As such a material, PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorbing material such as a fatty acid salt may be mixed with these materials. It is done.

  The plastic member 40a may include a material having light barrier properties such as ultraviolet rays. For example, the colored layer may contain a material having a light barrier property such as ultraviolet rays, and the plastic member 40 (40a) includes a layer made of a material having a light barrier property such as ultraviolet rays separately from the colored layer. May be. In this case, the light barrier property of the composite container 10A can be improved and the content liquid can be prevented from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10a. For example, a plastic member 40a may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and the bottom portion 30 of the container body 10 to enhance the ultraviolet barrier property of this portion. Such a layer is preferably provided as an inner surface layer of the plastic member 40a. 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 include a material having a higher thermal insulation property or a higher thermal insulation property (a material having a lower thermal conductivity) than a plastic material constituting the container body 10 (preform 10a). For example, the colored layer may include a material having a higher heat retaining property or a higher heat retaining property than a plastic material constituting the container body 10 (preform 10a) (a material having a low thermal conductivity), and the plastic member 40 (40a ) May be provided with a layer made of a material (material having low thermal conductivity) having higher heat retention or cold retention than the plastic material constituting the container body 10 (preform 10a) separately from the colored layer. 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 cold retaining property of the composite container 10A is enhanced. For example, the plastic member 40 may be provided on all or a 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. Such a layer is preferably provided as an inner surface layer of the plastic member 40a. 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. It is preferable to mix hollow particles with a resin material containing these resins. The average particle diameter of the hollow particles is preferably 1 to 200 μm, and more preferably 5 to 80 μm. The “average particle size” means the volume average particle size and is measured by a known method using a particle size distribution / particle size distribution measuring device (for example, Nanotrack particle size distribution measuring device, manufactured by Nikkiso Co., Ltd.). can do. The hollow particles may be organic hollow particles composed of a resin or the like, or may be inorganic hollow particles composed of glass or the like. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include styrene resins such as cross-linked styrene-acrylic resins, (meth) acrylic resins such as acrylonitrile-acrylic resins, phenolic resins, fluorine resins, polyamide resins, and polyimides. Resin, polycarbonate resin, polyether resin and the like. Also, Ropeke HP-1055, Ropeke HP-91, Ropeke OP-84J, Ropeke Ultra, Ropeke SE, Ropeke ST (manufactured by Rohm and Haas), Nipol MH-5055 (manufactured by Nippon Zeon), SX8782 , And commercially available hollow particles such as SX866 (manufactured by JSR Corporation) can also be used. As content of a hollow particle, it is preferable that it is 0.01-50 mass parts with respect to 100 mass parts of resin materials contained in the layer of the plastic member 40a in which a hollow particle contains, and 1-20 mass parts It is more preferable that

  The plastic member 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 include 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 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. Such a layer is preferably provided as an outer surface layer of the plastic member 40a.

  Further, the plastic member 40a may be designed or printed. 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 plastic member 40 may be provided on all or part of the body 20 in the container body 10, and images and characters may be displayed on the body 20. The printing may be formed by designing or printing the plain plastic member 40a by a printing method such as an inkjet method, a gravure printing method, an offset printing method, a flexographic printing method, or the like. For example, when the inkjet method is used, a printing layer can be formed by applying 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 in a state where the plastic member 40a is provided outside the preform 10a. Furthermore, the plastic member 40 of the composite container 10A after blow molding may be printed.

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

  As shown in FIGS. 3 and 4A, the plastic member 40a has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 and a bottom 42 connected to the body 41. May be. In this case, since the bottom 42 of the plastic member 40a covers the bottom 30a of the preform 10a, various functions and characteristics can be imparted to the bottom 30 in addition to the trunk 20 of the composite container 10A. Examples of such a plastic member 40a include the above-described blow tube and sheet molded tube.

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

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

  In one embodiment, the plastic member 40a includes a step of preparing a resin film including a resin material, and a colored resin film including a resin material and a colorant, the resin film, and the colored resin film. And a step of obtaining a laminated film and a step of forming the laminated film.

  In one embodiment, the plastic member 40a includes a step of preparing a colored resin film comprising two or more resin materials and a colorant, a step of laminating the colored resin film to obtain a laminated film, and the lamination And a step of forming a film.

  Examples of the forming method include deep drawing, or a method of forming a laminated film into a cylindrical shape and fusing or bonding the end portions thereof.

  In one embodiment, the plastic member 40a can also be manufactured by multilayer extrusion into a tube shape.

  In one embodiment, the plastic member 40a can also be manufactured by bonding a single-layer plastic member.

  A commercial item may be used for the said resin sheet, and it can manufacture it by a conventionally well-known method. In this invention, it is preferable to manufacture by extrusion molding, and it is preferable that extrusion molding is performed by the T-die method or the inflation method.

  For example, a resin sheet can be formed by extrusion molding according to the following method. After drying the above resin material, it is supplied to a melt extruder heated to a temperature not lower than the melting point of the thermoplastic resin (Tm) to Tm + 70 ° C., and the resin material is heated and melted. A resin sheet can be formed by extruding into a sheet form from a die, and rapidly solidifying the extruded sheet form 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 depending on the purpose.

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

  In one embodiment, the colored resin sheet can be obtained by coating on at least one surface of the resin sheet obtained as described above. In one embodiment, a colored resin sheet can also be obtained by adding a colorant to a resin material and melt-extruding and cooling the mixture of the resin material and the colorant as described above.

  Examples of the adhesive used when laminating the resin sheet include, for example, a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, Examples include polyester adhesives, polyamide adhesives, polyimide adhesives, amino resin adhesives, phenol resin adhesives, epoxy adhesives, polyurethane adhesives, rubber adhesives, and silicone adhesives. . This adhesive can be applied by, for example, a roll coating method, a gravure roll coating method, a coating method such as a kiss coating method, a printing method, or the like.

  Next, a blow molding method (a 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. 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 preform 10a and the outer side of the preform 10a are adhered to each other by providing a plastic member 40a which is composed of a plurality of layers outside the preform 10a, and at least one of the plurality of layers is a colored layer. The composite preform 70 having the plastic member 40a thus manufactured is manufactured (see FIG. 5B). 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 mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

  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 pressed into the preform 10a to be brought into close contact with the outer surface of the preform 10a. Alternatively, as will be described later, a heat-shrinkable plastic member 40a is provided on the outer surface of the preform 10a, and the plastic member 40a is thermally contracted by heating to 50 ° C. to 100 ° C. You may make it stick to.

  In this way, a series of steps for manufacturing 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 manufacturing 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.

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

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

Modified Example of Blow Molding Method Next, a modified example of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. 6 (a) to 6 (f) has a function in which a plastic member (outer contraction member) 40a contracts with respect to the preform 10a, and other configurations are shown in FIG. 5 (a). It is substantially the same as the form shown in (f). 6A to 6F, the same parts as those in FIGS. 5A to 5F are denoted by the same reference numerals, and detailed description thereof is omitted.

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

  Next, a plastic member (outer contraction member) 40a is provided on the outer side of the preform 10a. The plastic member (outer contraction member) 40a includes at least one colored layer among the plurality of layers (see FIG. 6B). In this case, the plastic member (outer contraction member) 40 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 and a bottom 42 connected to the body 41. This plastic member (outer contraction member) 40 is mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

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

  In this way, the plastic member (outer contraction member) 40a is heated, so that the plastic member (outer contraction member) 40a is thermally contracted and is in close contact with the outside of the preform 10a (see FIG. 6C). . When the plastic member (outer contraction member) 40a itself has contractibility, the plastic member at the time when the plastic member (outer contraction member) 40a is provided outside the preform 10a (see FIG. 6B). (Outer contraction member) 40a may be in close contact with the outside of the preform 10a.

  Subsequently, the preform 10a and the plastic member (outer contraction member) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 6D).

  The preform 10a and the plastic member (outer contraction member) 40a are molded by using this blow molding die 50, and are substantially the same as those in FIGS. 5 (a) to 5 (f) described above. A composite container 10A including a plastic member (outer contraction member) 40 provided on the outer surface of the container body 10 is obtained (see FIGS. 6D to 6F).

  Next, with reference to FIGS. 7A to 7G, another modified example of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described. The modified example shown in FIGS. 7A to 7G includes a plurality of layers, and at least one of the plurality of layers is a plastic member (outer contraction member) 40a that is a colored layer. The preform 10a and the plastic member (outer contraction member) 40a are heated in two stages, and other configurations are substantially the same as those shown in FIGS. 5 (a) to 5 (f). It is. 7A to 7G, the same parts as those in FIGS. 5A to 5F are denoted by the same reference numerals, and detailed description thereof is omitted.

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

  Next, a plastic member (outer contraction member) 40a is provided outside the preform 10a (see FIG. 7B). In this case, the plastic member (outer contraction member) 40 a has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 and a bottom 42 connected to the body 41. This plastic member (outer contraction member) 40 is mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a.

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

  By heating the plastic member (outer contraction member) 40a, the plastic member (outer contraction member) 40a is thermally contracted, and is in close contact with the outside of the preform 10a. As a result, a composite preform 70 having the preform 10a and a plastic member (outer contraction member) 40a in close contact with the outside of the preform 10a is obtained (see FIG. 7C).

  In this way, the composite preform 70 is manufactured by preliminarily bringing the plastic member (outer contraction member) 40a into heat contact with the outside of the preform 10a using the first heating device 55, thereby producing the composite preform 70. A series of steps (FIGS. 7 (a) to (c)) and a series of steps (FIGS. 7 (d) to (g)) for producing the composite container 10A by blow molding are performed at different locations (factories and the like). ) Can be implemented.

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

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

  The composite preform 70 is molded using the blow mold 50 and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the above-described FIGS. A composite container 10A provided with the outer contractive member (outer contractive member) 40 is obtained (see FIGS. 7E to 7G).

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

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

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

  The modified examples shown in FIGS. 8, 9 and 10 (a) to 10 (f) are composed of a plurality of layers, and at least one of the plurality of layers is a colored layer as a plastic member 40a. And a cylindrical plastic member 40a is used.

  In the composite container 10 </ b> A shown in FIG. 8, the plastic member 40 extends from the shoulder 12 of the container body 10 to the lower part of the trunk 20, but does not reach the bottom 30. Further, in the composite preform 70 shown in FIG. 9, the plastic member 40a is in close contact so as to cover only the trunk portion 20a of the preform 10a, and more specifically, the neck portion 13 of the container body 10 in the trunk portion 20a. The region excluding the portion 13a corresponding to the portion and the portion corresponding to the lower portion of the body portion 20a is covered.

  8, 9, and 10 (a) to 10 (f), the other configurations are substantially the same as those of the embodiment shown in FIGS. 1 to 5. In the modified examples shown in FIGS. 8, 9 and 10A to 10F, the same parts as those in the embodiment shown in FIGS.

  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 in the embodiment shown in FIGS. 8, 9 and 10 (a) to 10 (f), the plastic member 40 may have a function of contracting with respect to the preform 10a.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. 11 to 20 are diagrams showing a second embodiment of the present invention. 11 to 20, the same parts as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, the outline of the composite container produced by the blow molding method according to the present embodiment will be described with reference to FIGS. 11 and 12.

  The composite container 10A shown in FIG. 11 and FIG. 12 is composed of a preform 10a, an inner label member 60a, and a plurality of layers using a blow molding die 50, as will be described later, and at least one of the plurality of layers is formed. By performing biaxial stretch blow molding on the composite preform 70 (see FIG. 13) including the plastic member 40a that is the colored layer, the preform 10a, the inner label member 60a, and the plastic member 40a of the composite preform 70 are formed. Is obtained by inflating as a unit.

  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 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 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 main 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 main 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 part. 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). In the present embodiment, a case where the entire plastic member 40 is transparent will be described as an example.

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

  Further, the thickness of the inner label member 60 is not limited to this, but can be set to, for example, about 5 μm to 50 μm when attached to the container body 10.

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

  The plastic member 40 is attached to the outer surface of the inner label member 60 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 stretched on the outer surface of the inner label member 60 to cover the inner label member 60. As shown in FIG. 12, 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, since the configurations of the container body 10 and the plastic member 40 are substantially the same as those in the first embodiment described above, detailed description thereof is omitted here.

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

  As shown in FIG. 13, the composite preform 70 includes a preform 10a made of a plastic material, a bottomed cylindrical inner label member 60a provided in close contact with the outer side of the preform 10a, and an inner label member 60a. It is composed of a plurality of layers provided in close contact with the outside, and at least one of the plurality of layers is a colored layer, and includes a bottomed cylindrical plastic member 40a.

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

  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 multilayer preform or a preform containing a blend material as the preform 10a, the gas barrier property of the composite container 10A is improved, the content liquid is prevented from being deteriorated by oxygen, and the content is caused by evaporation of water vapor. Can be prevented from decreasing. As such a material, PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorbing material such as a fatty acid salt may be mixed with these materials. It is done.

  The inner label member 60a may be made of a material having light barrier properties such as ultraviolet rays. In this case, the light barrier property of the composite container 10A can be improved and the content liquid can be prevented from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10a. 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.

  Further, the inner label member 60a may be made of a material having a higher heat retaining property or a higher heat retaining property than a plastic material constituting the container body 10 (preform 10a) (a material having a low thermal conductivity). 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 cold retaining property of the composite container 10A is enhanced. 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.

  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 as not to move or rotate. The plastic member 40a is provided over the entire 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 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 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, you may provide the two inner label members 60a and the plastic members 40a in two places outside the trunk | drum 20a, respectively.

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

  In the latter case, the plastic member (outer contraction member) 40a may be any member that has an effect of contracting the preform 10a. The plastic member (outer contraction member) 40a is preferably a member that contracts (for example, heat shrinks) with respect to the preform 10a when an external action (for example, heat) is applied.

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

  As shown in FIGS. 13 and 14A, the plastic member 40a (inner label member 60a) has a bottomed cylindrical shape as a whole, and includes a cylindrical body 41 (body 61) and a body 41. You may have the bottom part 42 (bottom part 62) connected with (the trunk | drum 61). In this case, since the bottom part 42 (bottom part 62) of the plastic member 40a (inner label member 60a) covers the bottom part 30a of the preform 10a, various functions are also applied to the bottom part 30 in addition to the trunk part 20 of the composite container 10A. And properties can be imparted.

  Further, as shown in FIG. 19 (described later) and FIG. 14B, the plastic member 40a (inner label member 60a) is formed in a circular tube shape (bottomless cylindrical shape) as a whole, and the cylindrical body portion 41 is formed. You may have (the trunk | drum 61). In this case, as the plastic member 40a (inner label member 60a), for example, an extruded tube can be used.

  Moreover, as shown in FIG.14 (c) and FIG.14 (d), even if the plastic member 40a (inner label member 60a) is produced by forming a film into a cylinder shape and bonding the edge part together. good. In this case, as shown in FIG. 14 (c), the plastic member 40a may be formed in a tube shape (bottomless cylindrical shape) having a body portion 41 (body portion 61). As shown in FIG. 3, the bottom portion 42 (bottom portion 62) may be bonded to form a bottomed cylindrical shape.

  Next, a blow molding method (a 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. 15A).

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

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

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

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

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

  Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow mold 50. The composite container 10A is molded using this blow molding die 50, and is substantially the same as in the case of the first embodiment described above, and the container body 10 and the inner label member provided on the outer surface of the container body 10. 60 and the composite container 10A provided with the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 15D to 15F).

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

Modified Example of Blow Molding Method Next, a modified example of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. The modification shown in FIGS. 16A to 16F is composed of a plurality of layers, and at least one of the plurality of layers is a plastic layer (outer contraction member) 40a with respect to the preform 10a. The other structures are substantially the same as the forms shown in FIGS. 15 (a) to 15 (f). 16A to 16F, the same parts as those in FIGS. 15A to 15F are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, a preform 10a made of a plastic material is prepared (see FIG. 16A).

  Next, an inner label member 60a is provided outside the preform 10a, and a plastic member (outer contraction member) 40a is provided outside the inner label member 60 (see FIG. 16B). The inner label member 60 and the plastic member (outer contraction member) 40a are mounted so as to cover the entire region of the body portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30a. At least a part of the plastic member (outer contraction member) 40a may be translucent or transparent.

  In this case, a plastic member (outer contraction member) 40a is provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (outer contraction member) 40a are integrally attached to the outside of the preform 10a. You may do it. Alternatively, the inner label member 60a may be provided outside the preform 10a, and then the plastic member (outer contraction member) 40a may be provided outside the inner label member 60.

  Next, the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a are heated by the heating device 51 (see FIG. 16C). At this time, the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a are uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a in this heating step may be, for example, 90 ° C. to 130 ° C.

  In this way, the plastic member (outer contraction member) 40a is heated, so that the plastic member (outer contraction member) 40a is thermally contracted and is in close contact with the outside of the preform 10a (see FIG. 16C). . In the case where the plastic member (outer contraction member) 40a itself has contractibility, the plastic member (outer contraction member) 40a is provided on the outer side of the inner label member 60a (see FIG. 16B). The member (outer contraction member) 40a may be in close contact with the outer side of the inner label member 60a.

  Subsequently, the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 16D).

  The preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a are molded using this blow molding die 50, and are substantially the same as in the case of FIGS. 15 (a) to 15 (f) described above. The composite container 10 </ b> A including the container body 10, the inner label member 60 provided on the outer surface of the container body 10, and the plastic member (outer contraction member) 40 provided outside the inner label member 60 is obtained. (Refer to Drawing 16 (d)-(f)).

  Next, with reference to FIGS. 17A to 17G, another modification of the blow molding method (a method for manufacturing the composite container 10A) according to the present embodiment will be described. 17 (a) to 17 (g) includes a plurality of layers, and a plastic member (outer contraction member) 40a in which at least one of the plurality of layers is a colored layer is formed on the preform 10a. The preform 10a and the plastic member (outer contraction member) 40a are heated in two stages, and other configurations are substantially the same as those shown in FIGS. 15 (a) to 15 (f). It is. 17A to 17G, the same parts as those in FIGS. 15A to 15F are denoted by the same reference numerals, and detailed description thereof is omitted.

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

  Next, an inner label member 60a is provided outside the preform 10a, and a plastic member (outer contraction member) 40a is provided outside the inner label member 60 (see FIG. 17B). The plastic member (outer contraction member) 40a is mounted so as to cover the entire region of the trunk portion 20a excluding the portion corresponding to the neck portion 13 of the container body 10 and the entire bottom portion 30a. At least a part of the plastic member (outer contraction member) 40a may be translucent or transparent.

  In this case, a plastic member (outer contraction member) 40a is provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (outer contraction member) 40a are integrally attached to the outside of the preform 10a. You may do it. Alternatively, the inner label member 60a may be provided outside the preform 10a, and then the plastic member (outer contraction member) 40a may be provided outside the inner label member 60.

  Next, the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a are heated by the first heating device 55 (see FIG. 17C). At this time, the heating temperature of the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a may be, for example, 50 ° C. to 100 ° C.

  By heating the plastic member (outer contraction member) 40a, the plastic member (outer contraction member) 40a is thermally contracted, and is in close contact with the outside of the preform 10a. Thereby, the 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 (outer contraction member) 40a in close contact with the outer side of the inner label member 60a is obtained. Is obtained (see FIG. 17C).

  As described above, by using the first heating device 55, the plastic member (outer contraction member) 40a is heated and adhered to the outside of the preform 10a and the inner label member 60a in advance, and the composite preform 70 is produced. The series of steps for producing the composite preform 70 (FIGS. 17A to 17C) and the series of steps for producing the composite container 10A by blow molding (FIGS. 17D to 17G) are separately performed. It becomes possible to carry out in place (factory etc.).

  Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 17D). At this time, the composite preform 70 is evenly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (outer contraction member) 40a in this heating step may be, for example, 90 ° C. to 130 ° C.

  Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 17E).

  The composite preform 70 is molded using the blow mold 50 and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the above-described FIGS. 15 (a) to 15 (f). The composite container 10A including the inner label member 60 and the plastic member (outer contraction member) 40 provided outside the inner label member 60 is obtained (see FIGS. 17E to 17G).

As described above, according to the present embodiment, the preform 10a, the inner label member 60a, and the plastic of the composite preform 70 are formed by performing blow molding on the composite preform 70 in the blow molding die 50. The product member 40a is expanded as a unit to produce a composite container 10A including the container body 10, the inner label member 60, and the plastic member 40. For this reason, the inner label member 60 can be provided in advance in the composite container 10A at the stage of manufacturing the composite container 10A using the preform 10a. Therefore, it is not necessary to provide a labeling step with a labeler after filling the composite container 10A with the content liquid and sealing it. Thereby, the manufacturing cost for manufacturing the final product can be suppressed.
Further, it is possible to prevent the yield from being lowered when the final product is manufactured due to a labeler defect or the like.

  Moreover, according to this Embodiment, the preform 10a (container main body 10) and the plastic member 40a (plastic member 40) can be comprised from another member. Therefore, various functions and characteristics can be freely imparted to the composite container 10A by appropriately selecting the type and shape of the plastic member 40.

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

Modified Example Next, a modified example of the present invention will be described with reference to FIGS. 18, 19 and 20A to 20F.

  The modified example shown in FIGS. 18, 19, and 20 (a) to 20 (f) includes an inner label member 60 a and a plurality of layers, and at least one of the plurality of layers is a plastic member 40 a that is a colored layer. As shown, the cylindrical inner label member 60a and the plastic member 40a are used instead of the body portion and the bottom portion.

  In the composite container 10 </ b> A shown in FIG. 18, the inner label member 60 and the plastic member 40 extend from the shoulder 12 of the container body 10 to the lower part of the trunk 20, but do not reach the bottom 30. Further, in the composite preform 70 shown in FIG. 19, the inner label member 60a and the plastic member 40a are in close contact with each other so as to cover only the trunk portion 20a of the preform 10a. An area excluding a portion 13a corresponding to the neck portion 13 of the main body 10 and a portion corresponding to the lower portion of the trunk portion 20a is covered.

  Other configurations in FIGS. 18, 19 and 20A to 20F are substantially the same as those in the embodiment shown in FIGS. In the modification shown in FIGS. 18, 19 and 20A to 20F, the same parts as those in the embodiment shown in FIGS.

  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 in the embodiment shown in FIGS. 18, 19, and 20 (a) to 20 (f), the plastic member 40 may have a function of contracting with respect to the preform 10 a.

Claims (10)

In the manufacturing method of the composite container,
Preparing a preform made of plastic material;
A process of providing a plastic member composed of a plurality of layers in close contact with the outside of the preform;
A step of blow molding the preform and the plastic member to expand the preform and the plastic member integrally;
Among the plurality of layers of the plastic member, Ri least one layer colored layer der,
The plastic member can be peeled off from the preform,
The method for producing a composite container, wherein the plastic member has a function of thermally shrinking the preform .   The composite according to claim 1, wherein the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer, and the outer surface layer, the intermediate layer, and / or the inner surface layer are the colored layer. Container manufacturing method.   The method for manufacturing a composite container according to claim 1, wherein the plastic member has an action of contracting with respect to the preform. In composite preform,
A preform made of plastic material,
A plastic member provided on the outside of the preform and composed of a plurality of layers;
The plastic member is in close contact with the outside of the preform,
Among the plurality of layers of the plastic member, Ri least one layer colored layer der,
The plastic member can be peeled off from the preform,
The composite preform, wherein the plastic member has a function of thermally shrinking the preform.   5. The plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer, and the outer surface layer, the intermediate layer, and / or the inner surface layer are the colored layer. Composite preform.   6. The composite preform according to claim 4, wherein the plastic member has a function of contracting with respect to the preform. In composite containers,
A container body made of plastic material;
Provided in close contact with the outside of the container body, comprising a plastic member composed of a plurality of layers,
The container body and the plastic member are expanded as a unit by blow molding,
Among the plurality of layers of the plastic member, Ri least one layer colored layer der,
The plastic member is peelable and removable from the container body,
The composite container , wherein the plastic member has an effect of thermally shrinking the container body .   8. The plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer, and the outer surface layer, the intermediate layer, and / or the inner surface layer are the colored layers. Composite container.   The composite container according to claim 7, wherein the plastic member has a contracting action. A plastic member for producing the composite container according to any one of claims 7 to 9 ,
Consists of multiple layers,
A plastic member, wherein at least one of the plurality of layers is a colored layer.

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