JP2016107538A - Blow molding method, composite preform, composite container, inner label member and plastic member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blow molding method, a composite preform, a composite container, an inner label member and a plastic member, capable of imparting various functions or features to a container.SOLUTION: A preform 10a made of a plastic material is prepared, and a plastic member 40a is disposed so as to surround outside the preform 10a. Thereby a composite preform 70 having the preform 10a and plastic member 40a in close contact with outside the preform 10a is produced. The composite preform 70 is heated and inserted inside a blow molding mold 50, blow molding is applied to the composite preform 70 inside the blow molding mold 50, and thereby the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded so that a composite container 10A is obtained.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a blow molding method, a composite preform, a composite container, an inner label member, and a plastic member.

  Recently, plastic bottles for storing content liquids such as foods and drinks have become common, and such plastic bottles store content liquids.

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

  By the way, in the conventional biaxial stretch blow molding method, for example, a preform including a single layer material such as PET or PP, a multilayer material, a blend material, or the like is used to form a container shape. However, in the conventional biaxial stretch blow molding method, the preform is generally simply formed into a container shape. For this reason, when various functions and characteristics (barrier property, heat retaining property, etc.) are given to the container, the means is limited, for example, by changing the material constituting the preform. 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 view of the above points, and can provide a blow molding method, a composite preform, a composite container, an inner label member, and a plastic capable of imparting various functions and characteristics to the container. It aims at providing a manufacturing member.

  The present invention provides a blow molding method for molding a composite container, a step of preparing a preform made of a plastic material, and by providing a plastic member so as to surround the outside of the preform, the preform, A step of producing a composite preform having the plastic member in close contact with the outside of the preform, a step of heating and inserting the composite preform into a blow mold, and the inside of the blow mold A step of blow-molding the composite preform to inflate the preform of the composite preform and the plastic member together, and the plastic member comprises an extruded tube. This is a blow molding method characterized.

  The present invention is a blow molding method characterized in that the plastic member is obtained by a method comprising a step of heating and melting a resin material and a step of extruding the heat and molten resin material into a tube shape. is there.

  According to the present invention, the preform has a mouth portion, a body portion, and a bottom portion, and the plastic member is provided so as to cover a part of the body portion and the bottom portion of the preform. This is a blow molding method characterized.

  The present invention is the blow molding method, wherein the plastic member has a gas barrier property or a light barrier property.

  The present invention is the blow molding method, wherein the plastic member is designed or printed.

  The present invention is the blow molding method, wherein the plastic member is made of a material having a higher heat retaining property or a cold retaining property than the plastic material constituting the preform.

  The present invention is the blow molding method, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the preform.

  The present invention provides a composite preform comprising a preform made of a plastic material and a plastic member provided so as to surround the outside of the preform, and the plastic member is in close contact with the outside of the preform. A composite preform in which the plastic member is made of an extruded tube.

  The present invention is a composite preform characterized in that the plastic member is obtained by a method comprising a step of heat-melting a resin material and a step of extruding the heat-melted resin material into a tube shape. is there.

  According to the present invention, the preform has a mouth portion, a body portion, and a bottom portion, and the plastic member is provided so as to cover a part of the body portion and the bottom portion of the preform. It is a characteristic composite preform.

  The present invention is the composite preform, wherein the plastic member has a gas barrier property or a light barrier property.

  The present invention is the composite preform characterized in that the plastic member is designed or printed.

  The present invention is the composite preform characterized in that the plastic member is made of a material having higher heat retention or cold retention than the plastic material constituting the preform.

  The present invention is the composite preform, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the preform.

  The present invention provides a composite container, comprising a container body made of a plastic material and a plastic member provided in close contact with the outside of the container body, the plastic member comprising an extruded tube, and the container body and The plastic member is a composite container that is integrally expanded by blow molding.

  The present invention is a composite container characterized in that the plastic member is obtained by a method comprising a step of heat-melting a resin material and a step of extruding the heat-melted resin material into a tube shape. .

  In the present invention, the container body has a mouth portion, a neck portion, a shoulder portion, a trunk portion, and a bottom portion, and the plastic member is formed of the neck portion, the shoulder portion, the trunk portion, and the bottom portion of the container body. A composite container is provided so as to cover a part of the container.

  The present invention is the composite container, wherein the plastic member has gas barrier properties or light barrier properties.

  The present invention is a composite container in which the plastic member is designed or printed.

  The present invention is the composite container, wherein the plastic member is made of a material having a higher heat retaining property or a cold retaining property than the plastic material constituting the container body.

  The present invention is the composite container, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the container body.

  The present invention provides a composite container that is mounted so as to surround the outer side of the preform and is heated together with the preform, and includes the preform and a plastic member that is in close contact with the outer side of the preform. A plastic member for manufacturing, wherein the plastic member has a cylindrical body portion that covers at least the body portion of the preform, and the plastic member is formed of an extruded tube.

  The present invention is a plastic member characterized in that the plastic member is obtained by a method comprising: a step of heating and melting a resin material; and a step of extruding the heat-melted resin material into a tube shape. is there.

  The present invention is a method for producing the plastic member, comprising the steps of heat-melting the resin material and extruding the heat-melted resin material into a tube shape. It is.

  The present invention provides a blow molding method for molding a composite container, a step of preparing a preform made of a plastic material, an inner label member so as to surround the outer side of the preform, and an outer side of the inner label member By providing a plastic member, the preform, the inner label member in close contact with the outer side of the preform, and the plastic member in close contact with the outer side of the inner label member are provided. A step of producing a composite preform; a step of heating and inserting the composite preform into a blow mold; and blow molding the composite preform in the blow mold. The preform of the composite preform, the inner label member, and the plastic member And a step of expanding as an integral, wherein the plastic member is a blow molding method characterized in that it consists of extruded tube.

  The present invention is a blow molding method characterized in that the plastic member is obtained by a method comprising a step of heating and melting a resin material and a step of extruding the heat and molten resin material into a tube shape. is there.

  In the present invention, the preform has a mouth portion, a body portion, and a bottom portion, and the inner label member and the plastic member cover a part of the body portion and the bottom portion of the preform. A blow molding method.

  The present invention is the blow molding method, wherein at least one of the plastic member and the inner label member has a gas barrier property or a light barrier property.

  The present invention is the blow molding method, wherein at least one of the plastic member and the inner label member is designed or printed.

  The present invention is the blow molding method, characterized in that at least one of the plastic member and the inner label member is made of a material having higher heat retention or cold retention than the plastic material constituting the preform. .

  The present invention is the blow molding method, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the preform.

  In the composite preform, the present invention is provided with a preform made of a plastic material, an inner label member provided in close contact so as to surround the outer side of the preform, and provided in close contact with the outer side of the inner label member. A composite preform comprising a plastic member, wherein the plastic member comprises an extruded tube.

  The present invention is a composite preform characterized in that the plastic member is obtained by a method comprising a step of heat-melting a resin material and a step of extruding the heat-melted resin material into a tube shape. is there.

  In the present invention, the preform has a mouth portion, a body portion, and a bottom portion, and the inner label member and the plastic member cover a part of the body portion and the bottom portion of the preform. It is a composite preform characterized by being provided in.

  The present invention is the composite preform, wherein at least one of the plastic member and the inner label member has a gas barrier property or a light barrier property.

  The present invention is the composite preform characterized in that at least one of the plastic member and the inner label member is designed or printed.

  The present invention is a composite preform characterized in that at least one of the plastic member and the inner label member is made of a material having higher heat retention or cold retention than the plastic material constituting the preform. .

  The present invention is the composite preform, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the preform.

  In the composite container, the present invention provides a container body made of a plastic material, an inner label member provided in close contact with the outer side of the container body, and a plastic provided in close contact with the outer side of the inner label member. A composite container, wherein the plastic member is formed of an extruded tube, and the container body, the inner label member, and the plastic member are integrally expanded by blow molding. .

  The present invention is a composite container characterized in that the plastic member is obtained by a method comprising a step of heat-melting a resin material and a step of extruding the heat-melted resin material into a tube shape. .

  In the present invention, the container body has a mouth portion, a neck portion, a shoulder portion, a trunk portion, and a bottom portion, and the inner label member and the plastic member are the neck portion, the shoulder portion, and the trunk portion of the container body. The composite container is provided so as to cover a part of the part and the bottom part.

  The present invention is the composite container, wherein at least one of the plastic member and the inner label member has gas barrier properties or light barrier properties.

  The present invention is a composite container in which design or printing is applied to at least one of the plastic member and the inner label member.

  The present invention is the composite container, wherein at least one of the plastic member and the inner label member is made of a material having higher heat retention or cold retention than the plastic material constituting the container body.

  The present invention is the composite container, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the container body.

  The present invention is mounted so as to surround the outer side of the preform, is mounted on the inner side of the plastic member, and is heated together with the preform and the plastic member, whereby the preform and the preform An inner label member for producing a composite preform having an inner label member in close contact with the outside of the inner label member and the plastic member in close contact with the outer side of the inner label member, the body portion of the preform being It is an inner side label member characterized by having a cylindrical trunk | drum to cover.

  The present invention is mounted so as to surround the outside of the preform, is mounted on the outside of the inner label member, and is heated together with the preform and the inner label member, whereby the preform and the preform A plastic member for producing a composite preform having an inner label member in close contact with an outer side of a plastic member and a plastic member in close contact with the outer side of the inner label member, and covering a trunk portion of the preform A plastic member having a cylindrical body, wherein the plastic member is an extruded tube.

  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. Further, since the plastic member is made of an extruded tube, inexpensive and stable production is possible.

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. FIG. 4 is a perspective view showing a plastic member. FIGS. 5A to 5F are schematic views showing a blow molding method according to the first embodiment of the present invention. FIG. 6 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 7 is a horizontal sectional view showing the composite container according to the second embodiment of the present invention (cross-sectional view taken along line XII-XII in FIG. 6). FIG. 8 is a vertical sectional view showing a composite preform according to the second embodiment of the present invention. FIG. 9 is a perspective view showing an inner label member and various plastic members. 10A to 10F are schematic views showing a 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 5 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 FIGS. 1 and 2 is biaxially stretched with respect to a composite preform 70 (see FIG. 3) including a preform 10a and a plastic member 40a using a blow molding die 50, as will be described later. By performing blow molding, the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded.

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

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

  On the other hand, the plastic member 40 is in close contact with the outer surface of the container body 10 in a thinly extended state, and is attached to the container body 10 so as not to move or rotate easily, or does not fall by its own weight. It is closely attached to the extent.

  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). You may form as a multilayer bottle which has gas barrier property and light-shielding property by extrusion-molding preform 10a which consists of three or more layers as resin which has (intermediate layer), and carrying out blow molding. As the intermediate layer, a resin obtained by blending the above-described various resins may be used.

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

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

  Next, the plastic member 40 will be described. The plastic member 40 (40a) is formed of an extruded tube, and is provided so as to surround the outer side of the preform 10a as described later. After being in close contact with the outer side of the preform 10a, the biaxially stretched blow molding together with the preform 10a is performed. It is obtained by doing. Since the plastic member 40a is made of an extruded tube, inexpensive and stable production is possible.

  The plastic member 40 is attached to the outer surface of the container main body 10 without being bonded, and is in close contact with the container main body 10 so that it does not move or rotate, or in close contact with the container main body 10 so that it does not fall by its own weight. 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 and the trunk portion 20 except for the mouth portion 11, the neck portion 13, and the bottom portion 30 in the container body 10. Thereby, desired functions and characteristics can be imparted to the shoulder portion 12 and the trunk portion 20 of the container body 10.

  The plastic member 40 may be provided in the entire region or a partial region other than the mouth portion 11 of the container body 10. For example, the plastic member 40 may be provided so as to cover the entire neck portion 13, the shoulder portion 12, and the trunk portion 20 except for the mouth portion 11 and the bottom portion 30 in the container body 10. Alternatively, the plastic member 40 may be provided so as to cover a part of the bottom 30 in addition to this. 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 trunk | drum 20, 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 is cut using a cutter or the like, or a cutting line (not shown) is provided in advance on the plastic member 40, and the plastic member 40 is peeled along the cutting line. Can do. 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.

  Further, the plastic member 40 may be a single layer or a multilayer.

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

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

  As shown in FIG. 3, the composite preform 70 includes a preform 10a made of a plastic material and a bottomless 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 made of an extruded tube and is attached to the outer surface of the preform 10a without being bonded, and is in close contact with the preform 10a so that it does not move or rotate, or does not fall by its own weight. Is in close contact. 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 trunk portion 20a excluding the portion 13a corresponding to the neck portion 13 of the container body 10.

  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 including the neck portion. Alternatively, the plastic member 40a may cover the entire region of the trunk portion 20a and a partial region of the bottom portion 30a. 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.

  The plastic member 40a is, for example, polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS tree, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyvinyl. Alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, polyacrylonitrile, polyacrylamide, polybutadiene, polybutene-1, polyisoprene, polychloroprene, ethylene Propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluoro rubber, nylon 6, nylon 6,6, nylon MXD6, aromatic polyamide, Recarbonate, Poly (ethylene terephthalate), Poly (ethylene terephthalate), Poly (ethylene naphthalate), U polymer, Liquid crystal polymer, Modified polyphenylene ether, Polyether ketone, Polyether ether ketone, Unsaturated polyester, Alkyd resin, Polyimide, Polysulfone, Polyphenylene sulfide It can be produced using a resin material comprising polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, epoxy resin and the like. Among these, it is preferable to include thermoplastic inelastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). The resin material may include a copolymer obtained by polymerizing two or more monomer units constituting the above-described resin. 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.

  In addition, the plastic member 40 (40a) may contain various additives in addition to the above-mentioned resin as the main component within a range where the characteristics are not impaired. Examples of additives include plasticizers, UV stabilizers, anti-coloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, yarn friction reducing agents, slip agents, mold release agents, An oxidizing agent, an ion exchange agent, a coloring pigment, and the like can be added. Also, by mixing an inert gas (nitrogen gas, argon gas) with a melt of a thermoplastic resin, a foam member having a foam cell diameter of 0.5 to 100 μm is used, and this foam preform is molded. , The light shielding property can be improved.

  Moreover, the plastic member 40 (40a) may contain the same material as the container main body 10 (preform 10a). Moreover, when the plastic member 40 (40a) consists of multiple layers, the plastic member 40 (40a) may include a layer made of the same material as the container body 10 (preform 10a). In this case, in the composite container 10A, for example, the plastic member 40 can be arranged mainly on the portion where the strength is to be increased, and the strength of the portion can be selectively increased. For example, a plastic member 40 may be provided around the periphery of the shoulder 12 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. Further, when the plastic member 40 (40a) is formed of multiple layers, the plastic member 40 (40a) may include a layer 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, the gas barrier property of the composite container 10A is improved, 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 to prevent the internal volume from decreasing. For example, the plastic body 40 may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and a part of the bottom portion 30 in the container body 10, and the gas barrier property of this portion may be enhanced. 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.

  Further, the plastic member 40 (40a) may contain a material having light barrier properties such as ultraviolet rays. Further, when the plastic member 40 (40a) is composed of multiple layers, the plastic member 40 (40a) may include a layer made of a material having a light barrier property 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. For example, the plastic body 40a may be provided in the entire region of the shoulder portion 12, the neck portion 13, the trunk portion 20, and a part of the bottom portion 30 in the container body 10 to enhance the ultraviolet barrier property of this portion. As such a material, a blend material or a material obtained by adding a light-shielding resin to PET, PE, or PP can be considered. Moreover, you may use the foaming member with the foam cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the melt of a thermoplastic resin.

  Further, the plastic member 40 (40a) may be made of a material having a higher heat retaining property or a higher heat retaining property (a material having a lower thermal conductivity) than a plastic material constituting the container body 10 (preform 10a). In the case where the plastic member 40 (40a) is composed of multiple layers, the plastic member 40 (40a) is a material (heat conduction) having a higher heat retaining property or cold retaining property than the plastic material constituting the container body 10 (preform 10a). A layer made of a material having low properties). 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 the whole or a part of the body 20 in the container body 10 to enhance the heat retaining property or the cold retaining property of the body 20. Further, when the user grips the composite container 10A, it is prevented that the composite container 10A becomes difficult to hold due to being too hot or too cold. Examples of such materials include foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. Moreover, you may use the foaming member with the foam cell diameter of 0.5-100 micrometers produced by mixing inert gas (nitrogen gas, argon gas) with the melt of a thermoplastic resin. 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, when the plastic member 40a consists of a single layer, it is preferable that it is 0.01-50 mass parts with respect to 100 mass parts of resin materials contained in the plastic member 40a. More preferably, it is -20 mass parts. Moreover, when the plastic member 40a consists of a multilayer, it is preferable that it is 0.01-50 mass parts with respect to 100 mass parts of resin materials in the layer of the plastic member 40a in which a hollow particle is contained, 1-20 More preferably, it is part by mass.

  Further, the plastic member 40 (40a) may include a material that is less slippery than the plastic material constituting the container body 10 (preform 10a). Further, when the plastic member 40 (40a) is composed of multiple layers, the plastic member 40 (40a) includes a layer made of a material that is less slippery than the plastic material constituting the container body 10 (preform 10a) as the outermost layer. May be. 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.

  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 trunk 20 in the container body 10, and images or characters may be displayed on the trunk 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 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. As a material of the plastic member 40, the same material as the container body 10 may be used, or a material different from the container body 10 may be used. The plastic member 40a may be colored in colors such as red, blue, yellow, green, brown, black, white, and may be transparent or opaque.

  The plastic member 40a (40) may be composed of multiple layers as described above. For example, the main components constituting the innermost and outermost layers may be the same or different. . Specific examples of the layer structure include, from the innermost surface, low density PE / adhesive layer / EVOH / adhesive layer / low density PE, and PP / adhesive layer / EVOH / adhesive layer / PP. 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 shape of the plastic member 40a will be described.

  As shown in FIGS. 3 and 4, the plastic member 40a is preferably a bottomless cylindrical tube as a whole. By providing such a plastic member 40, various functions and characteristics can be imparted to the body portion 20 of the composite container 10A.

  In the composite container 10 </ b> A shown in FIG. 1, 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. 3, 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. The present invention is not limited to this, and the plastic member 40 may cover a part of the bottom of the container body 10. Similarly, the plastic member 40 a is a part of the bottom 30 a of the preform 10 a. The part may be covered. The same applies to the following embodiments.

  Next, a manufacturing method of the plastic member 40a made of an extruded tube will be described.

  In one embodiment, the plastic member 40a can be produced by a method including at least a step of heating and melting a resin material and a step of continuously extruding the heat-melted resin material into a tube shape. . More specifically, first, the above resin material is heated and melted and continuously extruded from a ring die. Next, by cooling the extruded tubular resin material, a plastic member made of an unstretched extruded tube can be obtained. Furthermore, a plastic member made of a stretched extruded tube can be obtained by biaxially stretching the unstretched extruded tube. 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. Moreover, although heating temperature changes with resin to be used, Preferably it is 120-250 degreeC, More preferably, it is 150-220 degreeC.

  The plastic member 40a may be composed of a single-layer extruded tube. However, the plastic member 40a is composed of a multilayer extruded tube, for example, when it is desired to increase the strength of the body portion 20a of the plastic member 40a. May be. A multilayer extruded tube can be obtained by co-extruding resin materials having two or more different compositions.

  In addition, the said extruded tube may use what is marketed.

  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, by providing a plastic member 40a on the outside of the preform 10a, a composite preform 70 having the preform 10a and the plastic member 40a in close contact with the outside of the preform 10a is manufactured (FIG. 5 ( b)). In this case, the plastic member 40 a has a bottomless cylindrical shape as a whole and has a cylindrical 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.

  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.

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

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

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

  The composite container 10 </ b> A is molded using this blow molding die 50. In this case, the blow mold 50 includes a pair of body molds 50a and 50b and a bottom mold 50c that 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. 5 (e), after the bottom mold 50c is lowered, the pair of body molds 50a and 50b are closed, and the pair of body molds 50a and 50b and the bottom mold 50c are used. A sealed blow molding die 50 is configured. 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 mold 50.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. 6 to 10 are views showing a second embodiment of the present invention. 6 to 10, 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 FIG.

  As will be described later, the composite container 10A shown in FIG. 6 uses a blow molding die 50, and is 2 to the composite preform 70 (see FIG. 8) including the preform 10a, the inner label member 60a, and the plastic member 40a. By performing axial stretch blow molding, the preform 10a of the composite preform 70, the inner label member 60a, and the plastic member 40a are integrally expanded.

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

  Among these, the 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 main body 10 in a thinly extended state, and is in close contact with the container main body 10 so that it does not easily move or rotate, or does not fall by its own weight. It is closely attached to the extent.

  The plastic member 40 is in close contact with the outer surface of the container body 10 and the outer surface of the inner label member 60 in a thinly extended state, and is in close contact with the container body 10 so as not to easily move or rotate. It is in close contact to the extent that it does not fall due to its own weight.

  It is conceivable that at least a part of the plastic member 40 is translucent or transparent. In this case, the inner label member 60 can be visually recognized from the outside through the translucent or transparent portion. The plastic member 40 may be entirely translucent or transparent, or may have an opaque portion and a translucent or transparent portion (for example, a window portion). 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 and the trunk portion 20 except for the mouth portion 11, the neck portion 13, and the bottom portion 30 in the container main body 10. Thereby, desired characters, images, and the like can be imparted to the shoulder portion 12 and the trunk portion 20 of the container main body 10, and the composite container 10A can be decorated and information can be displayed.

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

  Moreover, 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 in a state where the inner label member 60 is 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. 7, 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 configuration of the container body 10, the configuration of the plastic member 40, the manufacturing method thereof, and the like are substantially the same as in the case of the first embodiment described above, and thus detailed description thereof is omitted here.

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

  As shown in FIG. 8, the composite preform 70 includes a preform 10a made of a plastic material, a bottomless cylindrical inner label member 60a provided in close contact with the outer side of the preform 10a, and an inner label member 60a. And a bottomless 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 being easily moved or rotated. 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, the gas barrier property of the composite container 10A can be enhanced without using a multilayer preform or a preform containing a blend material as the preform 10a, and the content liquid can be prevented from being deteriorated by oxygen or water vapor. 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.

  Further, 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.

  Moreover, the inner label member 60a may be made of a material (a material having a low thermal conductivity) having a higher heat retaining property or a lower heat retaining property than a plastic material constituting 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 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 that it does not move or rotate, or close enough not to fall by its own weight. Has been. 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 excluding the portion 13a corresponding to the neck portion 13 of the container body 10 in the trunk portion 20a.

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

  In 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 FIG. 9, the plastic member 40a preferably has a bottomless cylindrical shape as a whole. By providing such a plastic member 40, various functions and characteristics can be imparted to the body portion 20 of the composite container 10A.

  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. 10A).

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

  In this case, the inner label member 60a and the plastic member 40a having an inner diameter that is the same as or slightly smaller than the outer diameter of the preform 10a and the plastic member 40a are pressed into the preform 10a, respectively, to be brought into close contact with the outer surface of the preform 10a. good.

  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. 10 (FIG. 10 (FIG. 10 (A))) 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 and producing the composite preform 70. a) to (b)) and a series of steps (FIGS. 10 (d) to (f)) for producing the composite container 10A by blow molding can be carried out at different places (factory or the like).

  Next, the composite preform 70 is heated by the heating device 51 (see FIG. 10C).

  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. 10 and the composite container 10A provided with the plastic member 40 provided outside the inner label member 60 is obtained (see FIGS. 10D to 10F).

  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.

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.

Claims (26)

In a blow molding method for molding a composite container,
Preparing a preform made of plastic material;
Providing a plastic member on the outside of the preform;
Heating the preform and the plastic member and inserting it into a blow mold; and
A step of blow-molding the preform and the plastic member in the blow-molding mold to inflate the preform and the plastic member together,
The blow molding method, wherein the plastic member comprises an extruded tube. The plastic member is
A step of heating and melting the resin material;
A step of extruding the melted resin material into a tube,
The blow molding method according to claim 1, wherein the blow molding method is obtained by a method comprising:   The preform has a mouth portion, a trunk portion, and a bottom portion, and the plastic member is provided so as to cover a part of the trunk portion and the bottom portion of the preform. The blow molding method according to claim 1 or 2.   The blow molding method according to any one of claims 1 to 3, wherein the plastic member has a gas barrier property or a light barrier property.   The blow molding method according to claim 1, wherein the plastic member is designed or printed.   The blow molding method according to any one of claims 1 to 5, wherein the plastic member is made of a material having higher heat retaining property or cold retaining property than the plastic material constituting the preform.   The blow molding method according to any one of claims 1 to 6, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the preform. A step of providing an inner label member so as to surround the outside of the preform;
The blow molding method according to claim 1, wherein the plastic member is provided outside the inner label member. In composite preform,
A preform made of plastic material,
A plastic member provided to surround the outside of the preform,
The plastic member is in close contact with the outside of the preform;
A composite preform, wherein the plastic member is made of an extruded tube. The plastic member is
A step of heating and melting the resin material;
A step of extruding the melted resin material into a tube,
The composite preform according to claim 9, which is obtained by a method comprising:   The preform has a mouth portion, a trunk portion, and a bottom portion, and the plastic member is provided so as to cover a part of the trunk portion and the bottom portion of the preform. The composite preform according to claim 9 or 10.   The composite preform according to any one of claims 9 to 11, wherein the plastic member has a gas barrier property or a light barrier property.   The composite preform according to any one of claims 9 to 12, wherein the plastic member is designed or printed.   The composite preform according to any one of claims 9 to 13, wherein the plastic member is made of a material having higher heat retention or cold retention than the plastic material constituting the preform.   The composite preform according to any one of claims 9 to 14, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the preform. An inner label member provided in close contact so as to surround the outside of the preform;
The composite preform according to any one of claims 9 to 15, wherein the plastic member is provided in close contact with the outside of the inner label member. In composite containers,
A container body made of plastic material;
A plastic member provided in close contact with the outside of the container body,
The plastic member comprises an extruded tube;
The composite container, wherein the container body and the plastic member are integrally expanded by blow molding. The plastic member is
A step of heating and melting the resin material;
A step of extruding the melted resin material into a tube,
The composite container according to claim 17, which is obtained by a method comprising:   The container body has a mouth portion, a neck portion, a shoulder portion, a trunk portion, and a bottom portion, and the plastic member is a part of the neck portion, the shoulder portion, the trunk portion, and the bottom portion of the container body. The composite container according to claim 17, wherein the composite container is provided so as to cover the container.   The composite container according to any one of claims 17 to 19, wherein the plastic member has a gas barrier property or a light barrier property.   The composite container according to any one of claims 17 to 20, wherein the plastic member is designed or printed.   The composite container according to any one of claims 17 to 21, wherein the plastic member is made of a material having a higher heat retaining property or a lower heat retaining property than the plastic material constituting the container main body.   The composite container according to any one of claims 17 to 22, wherein the plastic member is made of a material that is less slippery than the plastic material constituting the container body. An inner label member provided in close contact so as to surround the outside of the container body;
The composite container according to any one of claims 17 to 23, wherein the plastic member is provided in close contact with the outside of the inner label member. The composite container is mounted so as to surround the outside of the preform, and is heated together with the preform to produce a composite container having the preform and a plastic member closely attached to the outside of the preform. A plastic member,
The plastic member, wherein the plastic member has a cylindrical body portion that covers at least the body portion of the preform, and the plastic member is made of an extruded tube. The plastic member is
A step of heating and melting the resin material;
A step of extruding the melted resin material into a tube,
The plastic member according to claim 25, which is obtained by a method comprising:

Images