JP6458472B2 - Blow molding method, composite preform, composite container, inner label member and plastic member - Google Patents

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 consideration of such points, and can provide various functions and properties to a container, a blow molding method, a composite preform, a composite container, an inner label member, and a plastic. 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 And the step of blow-molding the composite preform to expand the preform of the composite preform and the plastic member together, and the plastic member includes at least polyethylene naphthalate Blow molding method characterized by comprising a resin material It is.

  In 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 the body portion and the bottom portion of the preform. This is a molding method.

  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 is the blow molding method, wherein the plastic member is an outer contractive member having an effect of contracting with respect to the preform.

  The present invention is the blow molding method, wherein the outer contractive member contracts with respect to the preform when heat is applied.

  In the present invention, the plastic member is an outer contractive member having an effect of contracting with respect to the preform, and the step of producing the composite preform includes the step of providing the outer contractive member outside the preform. And a step of heating the preform and the outer shrinkable member.

  The present invention provides a blow molding method for molding a composite container, the step of preparing a preform made of a plastic material, the step of providing an outer contraction member on the outside of the preform, the preform and the outer contraction member The preform and the outer contracting member are integrated with each other by heating and inserting into the blow molding mold, and performing blow molding on the preform and the outer contracting member in the blow molding mold. A blow molding method, wherein the plastic member is made of a resin material containing at least polyethylene naphthalate.

  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. The composite member is made of a resin material containing at least polyethylene naphthalate.

  In the present invention, the preform has a mouth portion, a trunk portion, and a bottom portion, and the plastic member is provided so as to cover the trunk portion and the bottom portion of the preform. It is a preform.

  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, wherein 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 is the composite preform, wherein the plastic member is an outer contractive member having a function of contracting with respect to the preform.

  The present invention is the composite preform, wherein the outer contracting member contracts with respect to the preform when heat is applied.

  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, wherein the container body and the plastic member are integrated by blow molding. The composite container is expanded and the plastic member is made of a resin material containing at least polyethylene naphthalate.

  In the present invention, the container main body has a mouth portion, a neck portion, a shoulder portion, a trunk portion, and a bottom portion, and the plastic member includes the neck portion, the shoulder portion, the trunk portion, and the bottom portion of the container main body. It is provided so that it may cover.

  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 a gas barrier property or a light barrier property.

  The present invention is the composite container, wherein the plastic member is designed or printed.

  The present invention is the composite container characterized in that the plastic member is made of a material having higher heat retention or cold retention than the plastic material constituting the container main 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 the composite container, wherein the plastic member is an outer contracting member having a contracting action.

  The present invention is the composite container, wherein the outer contractive member contracts when heat is applied.

  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 made of a resin material containing at least polyethylene naphthalate. It is a plastic 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, 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 a resin material containing at least polyethylene naphthalate.

  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 are provided so as to cover the body portion and the bottom portion of the preform. A blow molding method characterized by the above.

  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.

  The present invention is the blow molding method, wherein the plastic member is an outer contractive member having an effect of contracting with respect to the preform.

  The present invention is the blow molding method, wherein the outer contractive member contracts with respect to the preform when heat is applied.

  In the present invention, the plastic member is an outer contractive member having a function of contracting with respect to the preform, and the step of producing the composite preform includes providing the inner label member on the outer side of the preform. A blow molding method comprising: a step of providing the outer contractive member outside the inner label member; and a step of heating the preform, the inner label member, and the outer contractive member.

  The present invention provides a blow molding method for molding a composite container, the step of preparing a preform made of a plastic material, an inner label member on the outer side of the preform, and an outer side of the inner label member. A step of providing a shrink member, a step of heating and inserting the preform, the inner label member, and the outer shrink member into a blow mold, and the preform and the inner label member in the blow mold. And expanding the preform, the inner label member, and the outer shrink member together by blow molding the outer shrink member, and the plastic member includes at least polyethylene naphthalate A blow molding method comprising a resin material.

  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 is made of a resin material containing at least polyethylene naphthalate.

  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 are provided so as to cover the body portion and the bottom portion of the preform. Is a composite preform characterized by

  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 the 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.

  The present invention is the composite preform, wherein the plastic member is an outer contractive member having a function of contracting with respect to the preform.

  The present invention is the composite preform, wherein the outer contracting member contracts with respect to the preform when heat is applied.

  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. The container body, the inner label member, and the plastic member are integrally expanded by blow molding, and the plastic member is made of a resin material containing at least polyethylene naphthalate. It is a composite container.

  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 include the neck portion, the shoulder portion, and the trunk portion of the container body. It is a composite container provided so that a part and the said bottom part may be covered.

  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 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 container main 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 the composite container, wherein the plastic member is an outer contracting member having a contracting action.

  The present invention is the composite container, wherein the outer contractive member contracts when heat is applied.

  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 An inner label member having a cylindrical body portion to cover, wherein the plastic member is made of a resin material containing at least polyethylene naphthalate.

  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 made of a resin material containing at least polyethylene naphthalate.

  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, by forming the plastic member 40a using a resin material containing at least polyethylene naphthalate (PEN), gas barrier properties against oxygen, water vapor, carbon dioxide and carbon dioxide gas, and light barrier properties such as ultraviolet rays are improved. In addition, the mechanical strength can be improved.

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 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 main body 10 in a thinly extended state, and is attached to the container main body 10 without being easily moved or rotated.

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

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

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

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

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

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

  Such a container main body 10 can be manufactured by biaxially stretching blow-molding a preform 10a (described later) manufactured by injection molding a synthetic resin material. As the material of the preform 10a, that is, the container body 10, a thermoplastic resin, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), or PC (polycarbonate) may be used. preferable. 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 it has (intermediate layer), and carrying out blow molding. As the intermediate layer, a resin obtained by blending the above-described various resins may be used.

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

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

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

  The plastic member 40 is attached to the outer surface of the container body 10 without being bonded, and is in close contact with the container body 10 so as not to move or rotate. The plastic member 40 is thinly extended on the outer surface of the container body 10 to cover the container body 10. As shown in FIG. 2, the plastic member 40 is provided over the entire circumferential direction so as to surround the container body 10, and has a substantially circular horizontal cross section.

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

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

  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 (outside contraction member).

  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. Further, in this case, 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. When the plastic member 40a does not have an effect of contracting with respect to the preform 10a, the plastic member 40a is, for example, a blow tube produced by blow molding or a sheet produced by deep drawing a resin sheet. A molded tube, an extruded tube produced by extrusion molding, an inflation molded tube produced by molding a resin sheet produced by an inflation method, an injection molded tube produced by injection molding, etc. can be used. It is not limited and you may use molding methods other than the above.

  The plastic member 40 (40a) may be composed of multiple layers, and the innermost layer and the outermost layer may have the same or different layer configurations. Specific examples of the layer configuration include LDPE + PEN / adhesive layer / EVOH / adhesive layer / LDPE + PEN and PP / adhesive layer / EVOH / adhesive layer / LDPE from the innermost surface. 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.

  Moreover, although the thickness of the plastic member 40 is not limited to this, For example, it can be set as about 5 micrometers-50 micrometers in the state attached to the container main body 10. FIG.

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

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

  The plastic member 40a may be provided in the entire region or a partial region other than the mouth portion 11a. For example, the plastic member 40a may be provided so as to cover the 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.

  The plastic member 40a is made of a resin material containing at least polyethylene naphthalate (PEN). By forming the plastic member 40a using a resin material containing at least polyethylene naphthalate (PEN), it is possible to improve gas barrier properties against oxygen, water vapor, carbon dioxide, carbon dioxide gas, etc., and light barrier properties such as ultraviolet rays. Further, the permeation of carbon dioxide gas from the inside of the container can be further prevented. Furthermore, the mechanical strength can be improved by forming the plastic member 40a using a resin material containing polyethylene naphthalate (PEN). Further, when the plastic member 40a is composed of multiple layers, it includes at least one layer made of a resin material containing polyethylene naphthalate (PEN). When the plastic member 40a is a single layer, the content of polyethylene naphthalate (PEN) in the resin material is preferably 20% by mass or more, more preferably 50%, based on the total mass of all resins in the resin material. It is at least 90% by mass, more preferably at least 90% by mass. Moreover, when the plastic member 40a is a multilayer, it is preferably 20% by mass or more, more preferably based on the total mass of all resins in the resin material contained in the layer made of a resin material containing polyethylene naphthalate (PEN). Is 50% by mass or more, more preferably 90% by mass or more.

  The resin material may contain other resins other than polyethylene naphthalate (PEN). Examples of other resins include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), 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, fluorine rubber, nylon 6, nylon 6,6, nylon MXD6, aromatic polyamide, polycarbonate , Poly (ethylene terephthalate), poly (butylene 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 , Polyethersulfone, silicone resin, polyurethane, phenol resin, urea resin, polyethylene oxide, polypropylene oxide, polyacetal, epoxy resin and the like. Among these, it is preferable to use thermoplastic inelastic resins such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).

  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. Furthermore, various additives may be added to the resin material in addition to the resin such as polyethylene naphthalate (PEN), which is the main component, as long as the characteristics are not impaired. Examples of additives include plasticizers, UV stabilizers, anti-coloring agents, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, yarn friction reducing agents, slip agents, mold release agents, An oxidizing agent, an ion exchange agent, a color pigment, a light absorber 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 intensively arranged at a portion where the strength is to be increased, and the strength of the portion can be selectively increased. For example, plastic members 40 may be provided around the shoulder 12 and the bottom 30 of the container body 10 to increase the strength of this portion. Examples of such materials include thermoplastic resins, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate).

  The plastic member 40 (40a) may contain 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, 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. 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. Conceivable.

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

  Moreover, the plastic member 40 (40a) may include 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 contained in the layer of the plastic member 40a containing a hollow particle, More preferably 20 parts 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, and white, and may be transparent or opaque.

  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 part 42 of the plastic member 40a covers the bottom part 30a of the preform 10a, various functions and characteristics such as barrier properties are imparted to the bottom part 30 in addition to the trunk part 20 of the composite container 10A. For example, a blow tube or a sheet forming tube can be used.

  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 heat-melting a resin material, a step of extruding the heat-melted resin material to form a tubular parison, and an air in the tubular parison in a mold. And blow-molding the tubular parison in accordance with the shape of the mold.

  In one embodiment, the plastic member 40a is obtained by deep-drawing a resin sheet containing the resin material by a method such as vacuum forming, vacuum / pressure forming, or press forming.

  In one embodiment, the plastic member 40a is obtained by molding a resin sheet containing the resin material into a tube shape and bonding or fusing the end portions of the resin sheet.

  In one embodiment, the plastic member 40a is obtained by extruding the resin material in a tube shape from a ring die or the like and cooling it.

  A multilayer plastic member 40a is formed by laminating two or more of the above resin sheets to form a laminated body, deep-drawing this laminated body or forming a laminated body into a tube shape, and bonding or fusing the end portions thereof. Can be obtained. It can also be obtained by multilayer extrusion of different types of resin materials, and can also be obtained by adhering two or more single-layer plastic members 40a.

  The resin sheet is obtained by an inflation method or a T-die method in which the resin material is heated and melted and extruded.

  Examples of the adhesive used in the lamination of the resin sheet, the bonding of the end portion, and the bonding of the plastic member 40a made of a single layer include, for example, a polyvinyl acetate adhesive, a polyacrylate adhesive, and a cyanoacrylate adhesive. Adhesive, ethylene copolymer adhesive, cellulose adhesive, polyester adhesive, polyamide adhesive, polyimide adhesive, amino resin adhesive, phenol resin adhesive, epoxy adhesive, polyurethane adhesive , Rubber adhesives, silicone adhesives, and the like. This adhesive can be applied to the laminated resin sheet by, for example, a roll coating method, a gravure roll coating method, a coating method such as a kiss coating method, or a printing method.

  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 made of a resin material containing at least polyethylene naphthalate on the outside of the preform 10a, the preform 10a and the plastic member 40a in close contact with the outside of the preform 10a are provided. A composite preform 70 is produced (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 made of a resin material containing at least polyethylene naphthalate is provided outside the preform 10a (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. 7 (a) to 7 (g) has an effect that the plastic member (outer contraction member) 40a contracts with respect to the preform 10a, and the preform 10a and the plastic member (outer contraction member) 40a. Is heated in two stages, and the other configuration is substantially the same as the configuration shown in FIGS. 7A to 7G, the same parts as those in FIGS. 5A to 5F are denoted by the same reference numerals, and detailed description thereof is omitted.

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

  Next, a plastic member (outer contraction member) 40a made of a resin material containing at least polyethylene naphthalate 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. Moreover, since the plastic member 40a is provided outside the preform 10a, it is not necessary to prepare a new molding facility for molding the preform 10a.

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 (f) do not have a body portion and a bottom portion as the plastic member 40a, but use a cylindrical plastic member 40a. .

  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.

  A composite container 10A shown in FIGS. 11 and 12 is formed into a composite preform 70 (see FIG. 13) including a preform 10a, an inner label member 60a, and a plastic member 40a by using a blow molding die 50, as will be described later. On the other hand, by performing biaxial stretch blow molding, the preform 10a, the inner label member 60a, and the plastic member 40a of the composite preform 70 are integrally expanded.

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

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

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

  The inner label member 60a is in close contact with the outer surface of the preform 10a, and is in close contact with the preform 10a 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, 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. 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.

  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 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 outside the preform 10a, and a plastic member 40a made of a resin material containing at least polyethylene naphthalate 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. 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 has an effect that the plastic member (outer contraction member) 40a contracts with respect to the preform 10a, and the other configuration is shown in FIG. It is substantially the same as the form shown in (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 60 is provided outside the preform 10a, and a plastic member (outer shrink member) 40a made of a resin material containing at least polyethylene naphthalate is provided outside the inner label member 60 (FIG. 16 ( b)). 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 60 in advance, and the inner label member 60 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 60 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 60, 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 60, and the plastic member (outer contraction member) 40a are heated uniformly 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 60, and the plastic member (outer contraction member) 40a in this heating step may be 90 ° C. to 130 ° C., for example.

  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). . When the plastic member (outer contraction member) 40a itself has contractility, the plastic member (outer contraction member) 40a is provided on the outer side of the inner label member 60 (see FIG. 16B). The member (outer contraction member) 40 a may be in close contact with the outer side of the inner label member 60.

  Subsequently, the preform 10a, the inner label member 60, 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 60, 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) has an effect that the plastic member (outer contraction member) 40a contracts with respect to the preform 10a, and the preform 10a and the plastic member (outer contraction member) 40a. Is heated in two stages, and the other configuration is substantially the same as the configuration shown in FIGS. 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 60 is provided on the outer side of the preform 10a, and a plastic member (outer contracting member) 40a made of a resin material containing at least polyethylene naphthalate is provided on the outer side of the inner label member 60 (FIG. 17 ( b)). 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 60 in advance, and the inner label member 60 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 60 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 60, 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 60, 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 60 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 60 is obtained. Is obtained (see FIG. 17C).

  In this manner, by using the first heating device 55, the plastic member (outer contraction member) 40a is heat-adhered to the outside of the preform 10a and the inner label member 60 in advance to produce the composite preform 70. 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 60, and the plastic member (outer contraction member) 40a in this heating step may be 90 ° C. to 130 ° C., for example.

  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) 40a 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 20A to 20F does not have a body portion and a bottom portion as the inner label member 60a and the plastic member 40a, but has a cylindrical inner label member 60a and The plastic member 40a is used.

  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 (25)

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
Expanding the preform and the plastic member integrally by performing blow molding on the preform and the plastic member in the blow molding die; and
With
The plastic member has an effect of heat shrinking the preform;
The plastic member has a single-layer structure;
The blow molding method , wherein the plastic member contains 50% by mass or more of polyethylene naphthalate.   The said preform has a mouth part, a trunk | drum, and a bottom part, The said plastic member is provided so that the said trunk | drum and the said bottom part of the said preform may be covered. Blow molding method.   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. Item 3. The blow molding method according to Item 1 or 2.   The blow molding method according to claim 1, 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,
The plastic member has an effect of heat shrinking the preform;
The plastic member has a single-layer structure;
The composite preform characterized in that the plastic member contains 50% by mass or more of polyethylene naphthalate. The preform has a neck portion and a body portion and a bottom portion, said plastic member according to claim 9, wherein the provided so as to cover said barrel portion and the bottom portion of the preform Composite preform. Wherein the preform has a neck portion and a body portion and a bottom portion, wherein the plastic member, characterized in that it is provided so as to cover a part of said body portion and said bottom portion of said preform Item 11. A composite preform according to Item 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 retaining property or cold retaining property 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 outer side 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 container body and the plastic member are expanded as a unit by blow molding,
The plastic member has an action of heat shrinking the container body;
The plastic member has a single-layer structure;
The composite container, wherein the plastic member contains 50% by mass or more of polyethylene naphthalate. The container body has a mouth, a neck, a shoulder, a body, and a bottom, and the plastic member covers the neck, the shoulder, the body, and the bottom of the container body. The composite container according to claim 17 , wherein the composite container is provided. 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 higher heat retention or cold retention than the plastic material constituting the container 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. A plastic member for producing the composite container according to any one of claims 17 to 24,
It has a cylindrical body that covers at least the body of the preform,
The plastic member has an effect of heat shrinking the preform;
The plastic member has a single-layer structure;
The plastic member, wherein the plastic member contains 50% by mass or more of polyethylene naphthalate.

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