JP6852744B2 - Composite container and its manufacturing method, composite preform, plastic parts - Google Patents

Description

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

Recently, plastic bottles have become common as bottles for containing the contents of foods and drinks, and such plastic bottles contain the contents.

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

By the way, in the conventional biaxial stretching blow molding method, a container shape is formed by using a preform containing, for example, a single layer material such as PET or PP, a multilayer material or a blend material. However, in the conventional biaxial stretching blow molding method, it is general that the preform is simply molded into a container shape. Therefore, when the container is to have various functions and properties (barrier property, heat retention property, etc.), the means thereof is limited, for example, changing the material constituting the preform. In particular, it is difficult to give different functions and characteristics depending on the part of the container (for example, the body and the bottom).

Japanese Unexamined Patent Publication No. 2009-241526

The present invention has been made in consideration of such a point, and provides a composite container and a manufacturing method thereof, a composite preform, and a plastic member capable of imparting various functions and characteristics to the container. The purpose is to do.

The present invention relates to a method for manufacturing a composite container, a step of preparing a preform made of a plastic material, a step of providing a plastic member composed of a plurality of layers on the outside of the preform, and the preform and the above. The preform and the plastic member are integrally expanded by performing blow molding on the plastic member, and at least one of the plurality of layers of the plastic member is printed. It is a method for manufacturing a composite container, which is characterized in that it is used.

The present invention is a method for manufacturing a composite container, characterized in that the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer.

A method for producing a composite container, wherein the printed layer is formed of a resin material containing PE, PP and / or PET.

The present invention is a method for manufacturing a composite container, wherein the plastic member is a shrinkable tube.

The present invention includes a preform made of a plastic material and a plastic member provided outside the preform and composed of a plurality of layers in the composite preform, and the plastic member is the same as the preform. It is a composite preform that is in close contact with the outside and is characterized in that at least one of the plurality of layers of the plastic member is printed.

The present invention is a composite preform characterized in that the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer.

The present invention is a composite preform characterized in that the printed layer is formed of a resin material comprising PE, PP and / or PET.

The present invention is a composite preform characterized in that the plastic member is a shrinkable tube.

The present invention comprises a container body made of a plastic material and a plastic member provided in close contact with the outside of the container body and composed of a plurality of layers in a composite container, the container body and the plastic member. Is a composite container that is integrally expanded by blow molding and that at least one of the plurality of layers of the plastic member is printed.

The present invention is a composite container characterized in that the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer.

The present invention is a composite container characterized in that the printed layer is formed of a resin material containing PE, PP and / or PET.

The present invention is a composite container characterized in that the plastic member is a shrinkable tube.

The present invention is a composite container having the preform and a plastic member in close contact with the outside of the preform by being mounted on the outside of the preform made of a plastic material and inflated together with the preform. A plastic member for producing the above, which is composed of a plurality of layers, and at least one of the plurality of layers is printed.

According to the present invention, the composite preform and the plastic member are integrally expanded by performing blow molding on the composite preform in the blow molding mold. Therefore, the preform (container body) and the plastic member can be composed of separate 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, the plastic member is composed of a plurality of layers, of which at least one layer is printed such as a design or a print, that is, has a print area. Since the plastic member has a printing area, it is possible to display an image or characters on the composite container without separately attaching a label or the like to the container body after blow molding.

FIG. 1 is a partial vertical sectional view showing a composite container according to the first embodiment of the present invention. FIG. 2 is a horizontal sectional view (FIG. II-II sectional view of FIG. 1) showing a composite container according to the first embodiment of the present invention. FIG. 3 is a vertical sectional view showing a composite preform according to the first embodiment of the present invention. 4 (a) to 4 (f) are cross-sectional views showing various printed plastic members. 5 (a) to 5 (d) are schematic views showing an embodiment in which printing is performed on a plastic member. FIG. 6 is a schematic view showing an example of a printer that prints on a composite container. 7 (a) to 7 (d) are perspective views showing various plastic members. 8 (a) to 8 (f) are schematic views showing a blow molding method according to the first embodiment of the present invention. 9 (a) to 9 (f) are schematic views showing a blow molding method according to a modified example of the first embodiment of the present invention. 10 (a) to 10 (g) are schematic views showing a blow molding method according to a modified example of the first embodiment of the present invention. FIG. 11 is a partial vertical sectional view showing a modified example of the composite container according to the first embodiment of the present invention. FIG. 12 is a vertical sectional view showing a modified example of the composite preform according to the first embodiment of the present invention. 13 (a) to 13 (f) are schematic views showing a modified example of the blow molding method according to the first embodiment of the present invention. FIG. 14 is a partial vertical sectional view showing a composite container according to a second embodiment of the present invention. FIG. 15 is a horizontal sectional view (XV-XV line sectional view of FIG. 15) showing a composite container according to a second embodiment of the present invention. FIG. 16 is a vertical sectional view showing a composite preform according to a second embodiment of the present invention. 17 (a) to 17 (d) are perspective views showing various inner label members and various plastic members. 18 (a) to 18 (f) are schematic views showing a blow molding method according to a second embodiment of the present invention. 19 (a) to 19 (f) are schematic views showing a blow molding method according to a modified example of the second embodiment of the present invention. 20 (a) to 20 (g) are schematic views showing a blow molding method according to a modified example of the second embodiment of the present invention. FIG. 21 is a partial vertical sectional view showing a modified example of the composite container according to the second embodiment of the present invention. FIG. 22 is a vertical sectional view showing a modified example of the composite preform according to the second embodiment of the present invention. 23 (a) to 23 (f) are schematic views showing a modified example of the blow molding method according to the second embodiment of the present invention.

First Embodiment Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. 1 to 13 are diagrams showing the first embodiment of the present invention.

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. 1 and 2. In addition, in this specification, "upper" and "lower" mean the upper part and the lower part in the state (FIG. 1) in which the composite container 10A is upright, respectively.

As will be described later, the composite container 10A shown in FIGS. 1 and 2 is composed of a preform 10a and a plurality of layers using a blow molding die 50, and at least one of the plurality of layers is printed. The composite preform 70 (see FIG. 3) including the plastic member 40a is subjected to biaxial stretch blow molding, whereby the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded. It is a thing.

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

Of 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 body portion 20 provided below the shoulder portion 12, and a body. It is provided with a bottom portion 30 provided below the portion 20.

On the other hand, the plastic member 40 is composed of a plurality of layers including at least one layer having a printed region (printed region 44), and is brought into close contact with the outer surface of the container body 10 in a thinly extended state. It is attached to the container body 10 in a state where it does not easily move or rotate. The printing area 44 may be provided over the entire area of the layer on which the plastic member 40 is printed, or may be provided in a part thereof. Further, in FIG. 1, printing is applied to the outside of the outer surface layer of the plastic member 40, but the printing is not limited to this, and even if the printing is applied to the inside of any layer constituting the plastic member 40, the printing is applied. It may be applied to the outside.

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

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

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

Further, the body portion 20 has a cylindrical shape having a substantially uniform diameter as a whole. However, the present invention is not limited to this, and the body portion 20 may have a polygonal tubular shape such as a quadrangular tubular shape or an octagonal tubular shape. Alternatively, the body portion 20 may have a tubular shape having a non-uniform horizontal cross section from the upper side to the lower side. Further, in the present embodiment, the body portion 20 is not formed with irregularities and has a substantially flat surface, but the present invention is not limited to this. For example, the body portion 20 may have irregularities such as a panel or a groove.

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

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

Such a container 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), and PC (polycarbonate) can be used. preferable. Further, the above-mentioned various resins may be blended and used. The container body 10 may be colored in a color such as red, blue, yellow, green, brown, black, or white, but is preferably colorless and transparent in consideration of ease of recycling. Further, a thin-film 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.

Further, the container body 10 can be formed as a multi-layer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer is provided with 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). A preform 10a composed of three or more layers as a resin (intermediate layer) may be extruded and then blow-molded to form a multi-layer bottle having gas barrier properties and light-shielding properties. As the intermediate layer, a resin blended with the above-mentioned various resins may be used.

Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, a foamed preform having a foamed cell diameter of 0.5 to 100 μm is formed, and this foamed preform is blow-molded. By doing so, the container body 10 may be manufactured. Since such a container body 10 has a foam cell built-in, it is possible to improve the light-shielding property of the entire container body 10.

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

Next, the plastic member 40 will be described. The plastic member 40 (40a) is composed of a plurality of layers, and at least one of these layers is printed. Further, the plastic member 40 (40a) is provided so as to surround the outside of the preform 10a as described later, is brought into close contact with the outside of the preform 10a, and then biaxially stretched and blow-molded together with the preform 10a. It was obtained by.

Since the plastic member 40 is provided with the printing layer, it is possible to display images and characters on the composite container 10A without separately attaching a label or the like to the container body 10. For example, a plastic member 40 may be provided on all or a part of the body 20 of the container body 10, and an image or characters may be displayed on the body 20.

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

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

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

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

Such a plastic member 40a may not have an action of contracting with respect to the preform 10a, or may have an action of contracting. After blow molding, the plastic member 40a has an action of shrinking with respect to the preform 10a from the viewpoint that the amount of air entering between the container body and the plastic member 40 is small, that is, the adhesion is high. It is preferably a thing (shrink tube).

When the plastic member 40a has an action of contracting with respect to the preform 10a, the plastic member (shrink tube) 40a is provided on the outside of the preform 10a and is heated integrally with the preform 10a. It was obtained by axial stretching blow molding. The plastic member (shrink tube) 40a may be any one that has a shrinking action on the preform 10a. The plastic member (shrinkable tube) 40a itself may have shrinkage or elasticity and may be shrinkable without applying an external action. Alternatively, the plastic member (shrink tube) 40a may shrink (eg, heat shrink) with respect to the preform 10a when an external action (for example, heat) is applied.

As described above, the plastic member 40 (40a) is composed of a plurality of layers, and is preferably composed of an inner surface layer 41, an intermediate layer 42, and an outer surface layer 43.

Next, the printing performed on the plastic member 40 (40a) will be described. At least one layer of the plastic member 40 (40a) composed of the plurality of layers has a print such as a design or printing, that is, has a print area 44 (44a). Since the plastic member 40 (40a) includes the printing area 44 (44a), it is possible to display images and characters on the composite container 10A without separately attaching a label or the like to the container body 10. Become. This printing may be performed on a resin film before laminating, which will be described later, or may be performed on a single-layer plastic resin tube before laminating. Further, it may be applied to the plastic member (shrink tube) 40a before being attached to the preform 10a, or may be applied with the plastic member 40a provided on the outside of the preform 10a. Further, printing may be applied to the plastic member 40 of the composite container 10A after blow molding. Further, the printed area 44 (44a) may be provided on the outside or inside of each layer included in the plastic member 40 (40a). For example, the print area 44a may be formed on the outer side of the outer surface layer 43 (see FIG. 4A) or may be formed on the inner side (see FIG. 4B). Further, the print area 44a may be formed on the outer side of the middle surface layer 42 (see FIG. 4C), or may be formed on the inner side (see FIG. 4D). Further, the print area 44a may be formed on the outside of the inner surface layer 41 (see FIG. 4 (e)) or may be formed on the inside (see FIG. 4 (f)).

Further, printing can be performed by, for example, a printing method such as an inkjet method, a gravure printing method, an offset printing method, or a flexographic printing method.

For example, as shown in FIG. 5, when printing is performed on the inside of the intermediate layer 42, an inkjet nozzle is formed inside the plastic resin tube forming the intermediate layer 42 before laminating the inner surface layer 41 and the outer surface layer 43. 44 is inserted and printed by an inkjet method (see FIG. 5A), and then the inner surface layer 41 and the intermediate layer 42 are laminated via an adhesive (see FIG. 5B). Similarly, by laminating the outer surface layer 43 via an adhesive (see FIG. 5C), a plastic member 40a printed on the inside of the intermediate layer 42 can be obtained (FIG. 5D). ). Examples of the adhesive include a polyvinyl acetate adhesive, a polyacrylic acid ester adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, and a polyamide adhesive. Examples thereof include agents, polyimide adhesives, amino resin adhesives, phenol resin adhesives, epoxy adhesives, polyurethane adhesives, rubber adhesives, silicone adhesives and the like.

Further, for example, as shown in FIG. 6, when printing is performed on the outside of the outer surface layer 43, the printer 80 used includes a head 81 to which the composite container 10A is mounted and rotates (rotates and revolves). It has an ink spraying portion 82 that sprays ink onto the surface of the plastic member 40 of the composite container 10A mounted on the head 81, and an ink curing portion 83 that cures the adhered ink. In this case, the plastic member 40a of the composite container 10A mounted on the head 81 rotates and revolves while the ink is sprayed on the ink spraying portion 82. After that, the composite container 10A rises in the head 81, and the ink is, for example, UV-cured in the ink curing portion 83. As a result, printing is applied to the outside of the plastic member 40.

The ink used to form the print region 44 (44a) can contain a brown, black, green, white, red or blue colorant as the colorant. The colorant may be a pigment or a dye, but from the viewpoint of light resistance, it is preferably a pigment. Among the above-mentioned colorants, light-reflecting pigments such as titanium white, aluminum powder, mica powder, zinc sulfide, zinc oxide, calcium carbonate, kaolin, and talc are white pigments, and light-absorbing pigments are carbon black. Colored pigments such as ceramic black and bone black are preferable. By using an ink containing a pigment such as these, the transmittance of visible light of the plastic member 40 after blow molding can be reduced, and the quality of the content liquid filled in the composite container 10A can be prevented from changing. can do. The content of the colorant in the ink is preferably 0.01 to 30% by mass, and more preferably 1 to 10% by mass.

Further, the ink preferably contains a thermosetting resin or an ionizing radiation curable resin, and is more preferably an ionizing radiation curable resin from the viewpoints of high surface hardness and excellent productivity. A thermosetting resin and an ionizing radiation curable resin may be used in combination.

The ionizing radiation curable resin includes polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin, alkyd resin, spiroacetal resin, and polybutadiene, which can undergo a polymerization cross-linking reaction by irradiation with ionizing radiation such as ultraviolet rays and electron beams. Examples thereof include resins, polythiol polycircular resins, and polyhydric alcohols. UV curable resins are preferable because they have high followability and are less likely to cause defects such as cracks due to blow molding. As the ultraviolet curable resin, for example, a polymethylol having two or more unsaturated bonds such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, and N-vinylpyrrolidone having one unsaturated bond. Propanetri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,6 -Hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate and the like, or a reaction product of the above compound and (meth) acrylate and the like can be mentioned. In addition, in this specification, "(meth) acrylate" refers to methacrylate and acrylate. Further, it is preferable to use these resins in combination with a photopolymerization initiator, and examples thereof include acetophenones, benzophenones, and benzyls.

Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation resin, and silicon resin. Examples include polysiloxane resin. Further, it is preferable to use these resins in combination with a thermal polymerization initiator, a curing accelerator, a curing agent and the like.

The total content of the thermosetting resin and the ionizing radiation curable resin in the ink is preferably 1 to 20% by mass, and more preferably 1 to 10% by mass.

Printing may be repeated a plurality of times. As a result, even after the print layer 44a is stretched after blow molding, printing such as design or printing can be clearly displayed.

Further, it is preferable that the printing area 44 (44a) of the plastic member 40 (40a) is subjected to surface treatment such as corona treatment, low temperature plasma treatment, and frame treatment before printing is performed. By applying such a surface treatment, the wettability of the surface of the resin film and the single-layer resin tube can be improved, and the print quality can be improved. The surface of the plastic member 40a may be subjected to such treatment, not limited to the resin film and the resin tube.

Further, it is preferable that the anchor coat layer is formed in advance in the print area 44 (44a) of the plastic member 40 (40a). When the anchor coat layer is provided, the adhesion of the ink to the plastic member 40 (40a) is improved. Therefore, it is not necessary to perform pretreatment such as corona treatment. Further, the bleeding of printing can be reduced by providing the anchor coat layer.

The anchor coat layer can be formed by using a conventionally known anchor coat agent. Further, the anchor coat layer is formed by, for example, applying a coating liquid containing an anchor coating agent to the plastic member 40 (40a) by an inkjet method, irradiating the plastic member 40 (40a) with ionizing radiation, and curing the coating liquid. be able to.

Further, it is preferable to form a protective layer on the printed portion on the surface of the plastic member 40 (40a). Since the surface protective layer is formed on the surface of the plastic member 40 (40a), it is possible to effectively prevent the occurrence of defects over time such as printing applied to the plastic member 40 (40a). It is also possible to increase the durability of the composite container.

The protective layer preferably contains a thermosetting resin or an ionizing radiation curable resin, and is more preferably an ionizing radiation curable resin from the viewpoint of high surface hardness and excellent productivity. A thermosetting resin and an ionizing radiation curable resin may be used in combination. As the thermosetting resin and the ionizing radiation curable resin, those described above can be used. Further, for the protective layer, for example, a coating liquid containing the above resin is applied to a printed portion on the surface of the plastic member 40 (40a) by an inkjet method, and the protective layer is cured by, for example, irradiating it with ionizing radiation. Can be formed.

The thickness of the plastic member 40 is not limited to this, but can be, for example, about 5 μm to 50 μm when attached to the container body 10.

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

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

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

The plastic member 40a is attached to the outer surface of the preform 10a without being adhered to the preform 10a so that it does not move or rotate, or is in close contact with the preform 10a so as not to fall under 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 area of the body portion 20a except for the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire area of the bottom portion 30a.

The plastic member 40a may be provided in the entire area or a part of the area 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. Further, the number of the 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 on the outer side of the body portion 20a, respectively.

Such a plastic member 40a may not have an action of contracting with respect to the preform 10a, or may have an action of contracting.

In the former case, the plastic member 40a is obtained by, for example, a blow tube manufactured by blow molding, a film molding tube manufactured by film molding such as deep drawing, an extrusion tube manufactured by extrusion molding, or an inflation method. An inflation molding tube formed by molding a resin film, an injection molding tube produced by injection molding, or the like can be used, but the present invention is not limited to this, and a molding method other than the above may be used.

On the other hand, when the plastic member (shrink tube) 40a has an action of contracting, the plastic member (shrink tube) 40a has, for example, with respect to the preform 10a when an external action (for example, heat) is applied. Those that shrink (for example, heat shrink) may be used. Alternatively, the plastic member (shrinkable tube) 40 may itself have shrinkage or elasticity and can shrink without applying an external action.

Resin materials that can be used to prepare each layer of the plastic member 40a include, for example, polyethylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, poly-4-methylpentene-1, polystyrene, AS resin, ABS tree, and poly. Vinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluororesin, polymethyl methacrylate, polyacrylic acid, methyl polyacrylate, polyacrylonitrile, polyacrylamide, polybutadiene , Polybutene-1, polyisoprene, polychloroprene, ethylenepropylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluororubber, nylon 6, nylon 6,6, nylon MXD6, aromatic polyamide, polycarbonate, ethylene polyterephthalate , Butylene polyterephthalate, ethylene polynaphthalate, U polymer, liquid crystal polymer, modified polyphenylene ether, polyetherketone, polyetheretherketone, 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. Of these, it is preferable to contain a thermoplastic inelastic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). In particular, the resin material used to prepare the layer to be printed preferably contains PE, PP, and / or PET, and more preferably contains PE. When the resin material contains PE, PP and / or PET, the wettability of the layer to be printed can be easily improved, and the print quality can be improved. The content of PE, PP and PET is preferably 30% by mass or more, more preferably 60% or more, based on the resin material used for forming the layer to be printed. Further, the resin material may contain a copolymer in which two or more monomer units constituting the above resin are polymerized. Further, the resin material may contain two or more of the above-mentioned resins. Further, by mixing an inert gas (nitrogen gas, argon gas) with the melt of the 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 blocking effect can be enhanced.

Further, various additives may be contained in addition to the resin as the main component as long as the characteristics are not impaired. Additives include, for example, plasticizers, UV stabilizers, color inhibitors, matting agents, deodorants, flame retardants, weathering agents, antistatic agents, thread friction reducing agents, slipping agents, mold release agents, anti-oxidants. Examples thereof include an oxidizing agent, an ion exchanger, an adhesion imparting agent and a coloring pigment.

Further, the plastic member 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 having the layer is mainly arranged in the portion where the strength is desired to be increased, and the strength of the portion can be selectively increased. For example, the plastic member 40 may be provided around the shoulder portion 12 and the bottom portion 30 of the container body 10 to increase the strength of this portion. Such a layer is preferably provided as an inner surface layer of the plastic member 40a. Examples of such a material include thermoplastic resins, particularly PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), and PC (polycarbonate).

Further, the plastic member 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 blended material as the preform 10a, the gas barrier property of the composite container 10A is enhanced, oxygen intrusion into the container is prevented, and the content liquid is prevented from deteriorating. In addition, it is possible to prevent the evaporation of water vapor from the inside of the container to the outside and prevent the content from being reduced. For example, the plastic member 40 may be provided over the entire area of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container main body 10 to enhance the gas barrier property of this portion. Such a layer is preferably provided as an intermediate layer of the plastic member 40a. As such a material, PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorber such as a fatty acid salt may be mixed with these materials. Be done.

Further, the plastic member 40a may include a layer made of a material having a light ray barrier property such as ultraviolet rays. In this case, it is possible to enhance the light barrier property of the composite container 10A and prevent the content liquid from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10a. For example, the plastic member 40a may be provided over the entire area of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container main body 10 to enhance the ultraviolet barrier property of this portion. As such a material, a blended material or a material obtained by adding a light-shielding resin to PET, PE, or PP can be considered. Further, a foaming member having a foam cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, may be used.

Further, the plastic member 40a may include a layer made of a material (material having low thermal conductivity) having higher heat retention or cold retention than the plastic material constituting the container body 10 (preform 10a). 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. As a result, the heat retention or cold retention of the composite container 10A is enhanced. For example, the plastic member 40 may be provided on all or part of the body 20 of the container body 10 to improve the heat retention or cold retention 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. Such a layer is preferably provided as an inner surface layer of the plastic member 40a. As such a material, foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin and the like can be considered. Further, a foaming member having a foam cell diameter of 0.5 to 100 μm, which is produced by mixing an inert gas (nitrogen gas, argon gas) with the melt of the thermoplastic resin, may be used. It is preferable to mix hollow particles with the resin material containing these resins. The average particle size of the hollow particles is preferably 1 to 200 μm, more preferably 5 to 80 μm. The "average particle size" means the volume average particle size, and is measured by a known method using a particle size distribution / particle size distribution measuring device (for example, Nanotrack particle size distribution measuring device, manufactured by Nikkiso Co., Ltd.). can do. Further, 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, but are organic because of their excellent dispersibility. Hollow particles are preferred. Examples of the resin constituting the organic hollow particles include a styrene resin such as a crosslinked styrene-acrylic resin, a (meth) acrylic resin such as acrylonitrile-acrylic resin, a phenol resin, a fluorine resin, a polyamide resin, and a polyimide. Examples thereof include based resins, polycarbonate resins, and polyether resins. In addition, Low Pay HP-1055, Low Pay HP-91, Low Pay OP-84J, Low Pay Ultra, Low Pay SE, Low Pay ST (manufactured by Roam and Hearth Co., Ltd.), Nipole MH-5055 (manufactured by Nippon Zeon Co., Ltd.), SX8782 , SX866 (manufactured by JSR Corporation) and other commercially available hollow particles can also be used. The content of the hollow particles is preferably 0.01 to 50 parts by mass, preferably 1 to 20 parts by mass with respect to 100 parts by mass of the resin material contained in the layer of the plastic member 40a containing the hollow particles. It is more preferable that it is a part.

Further, the plastic member 40a may include a layer made of a material that is less slippery than the plastic material constituting the container body 10 (preform 10a). In this case, the user can easily grip the composite container 10A without changing the material of the container body 10. For example, the plastic member 40 may be provided on all or part of the body 20 of the container body 10 to make the body 20 easier to hold. Such a layer is preferably provided as an outer surface layer of the plastic member 40a.

The plastic member 40a may be pre-printed with a design or printing. That is, a printed printing area 44a may be provided on the inside and / or outside of any layer of the plastic member 40a.

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

As shown in FIG. 7A, the plastic member 40a has a bottomed cylindrical shape as a whole, and may have a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. .. In this case, since the bottom portion 42 of the plastic member 40a covers the bottom portion 30a of the preform 10a, various functions and characteristics can be imparted to the bottom portion 30 in addition to the body portion 20 of the composite container 10A. Examples of such a plastic member 40a include the blow tube, film molding tube, and injection molding tube described above.

Further, as shown in FIG. 7B, the plastic member 40a may have a circular tube shape (bottomless cylindrical shape) as a whole, and may have a cylindrical body portion 41. In this case, as the plastic member 40a, for example, the blow tube, the extrusion tube, the inflation molding tube, the film molding tube, and the injection molding tube described above can be used.

Further, as shown in FIGS. 7 (c) and 7 (d), the plastic member 40a may be manufactured by forming a film into a tubular shape and laminating its ends. In this case, as shown in FIG. 7 (c), the plastic member 40a may be formed in a pipe shape (bottomless cylindrical shape) having a body portion 41, and as shown in FIG. 7 (d). It may be formed in a bottomed cylinder shape by sticking the bottom portions 42 together. In this case, as the plastic member 40a, for example, a blow tube, an extrusion tube, an inflation molding tube, or a film molding tube can be used.

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

In one embodiment, the plastic member 40a can be manufactured by laminating a resin sheet containing a resin material (laminated resin sheet) and then molding the plastic member 40a. Examples of the molding method include deep drawing molding, or a method of molding a resin sheet into a tubular shape and fusing or adhering its ends. Further, printing may be performed on the surface of one or more resin sheets by using an inkjet method or the like. Further, an anchor coat layer may be formed in advance on the printed portion, or a protective layer may be formed on the printed portion.

In one embodiment, the plastic member 40a can also be manufactured by extruding a heat-melted resin material into a tube shape in multiple layers. Also, the resin material extruded in multiple layers in a tube shape can be directly blow molded in the mold. A plastic member 40a can be obtained. Further, printing may be performed on the outside and / or inside of the plastic member 40a by using an inkjet method or the like. Further, an anchor coat layer may be formed in advance on the printed portion, or a protective layer may be formed on the printed portion.

Further, in one embodiment, the plastic member 40a prepares plastic resin tubes forming the inner surface layer 41, the intermediate layer 42, and the outer surface layer 43 by extruding each resin material, and adheres them. It can be obtained by laminating through an agent. Further, printing may be performed on the inside and / or outside of the inner surface layer 41, the intermediate layer 42 and / or the outer surface layer 43 by using an inkjet method or the like. Further, an anchor coat layer may be formed in advance on the printed portion, or a protective layer may be formed on the printed portion.

The resin sheet can be produced by a conventionally known method. In the present invention, it is preferably produced by extrusion molding, and the extrusion molding is preferably carried out by a T-die method or an inflation method.

For example, the resin sheet can be molded by extrusion molding by the following method. After the above-mentioned resin material is dried, it is supplied to a melt extruder heated to a temperature (Tm) to Tm + 70 ° C. higher than the melting point of the thermoplastic resin to heat and melt the resin material, for example, T-die or the like. A resin sheet can be formed by extruding a sheet-like material from a die and quenching and solidifying the extruded sheet-like material with a rotating cooling drum or the like. As the melt extruder, a single-screw extruder, a twin-screw extruder, a vent extruder, a tandem extruder and the like can be used depending on the purpose.

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

A commercially available product may be used as the resin film, or the resin film can be produced by a conventionally known method. In the present invention, it is preferably produced by extrusion molding, and the extrusion molding is preferably carried out by a T-die method or an inflation method.

For example, the resin film can be molded by extrusion molding by the following method. After the above-mentioned resin material is dried, it is supplied to a melt extruder heated to a temperature (Tm) to Tm + 70 ° C. higher than the melting point of the thermoplastic resin to heat and melt the resin material, for example, T-die or the like. A resin film can be formed by extruding a sheet from a die and quenching and solidifying the extruded sheet with a rotating cooling drum or the like. As the melt extruder, a single-screw extruder, a twin-screw extruder, a vent extruder, a tandem extruder and the like can be used depending on the purpose.

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

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

Next, the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. 8A to 8F. Here, a case where the plastic member 40a is pre-printed will be described as an example.

First, a preform 10a made of a plastic material is prepared (see FIG. 8A). In this case, the preform 10a may be produced by an injection molding method using, for example, an injection molding machine (not shown). Further, as the preform 10a, a preform generally used in the past may be used.

Next, the preform 10a and the preform 10a are provided by providing a plastic member 40a which is composed of a plurality of layers on the outside of the preform 10a and in which at least one of the plurality of layers is provided with a printing area 44a. A composite preform 70 having a plastic member 40a in close contact with the outside of the above is produced (see FIG. 8B). In this case, the plastic member 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member 40a is attached so as to cover the entire body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire bottom portion 30a.

In this case, a plastic member 40a having an inner diameter equal to or slightly smaller than the outer diameter of the preform 10a may be pushed into the preform 10a so as 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 heat-shrinked by heating to 50 ° C. to 100 ° C. to shrink the outer surface of the preform 10a. It may be in close contact with.

In this way, a series of steps for producing the composite preform 70 by bringing the plastic member 40a into close contact with the outside of the preform 10a in advance to prepare the composite preform 70 (FIGS. 8A to 8B). )) And a series of steps (FIGS. 8 (c) to (f)) for producing the composite container 10A by blow molding can be carried out at different places (factory or the like).

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

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

The composite container 10A is molded using the blow molding die 50. In this case, the blow molding die 50 includes a pair of body molds 50a and 50b that are separated from each other and a bottom mold 50c (see FIG. 8D). In FIG. 8D, 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. 8 (e), after the bottom mold 50c is lowered, the pair of body molds 50a and 50b are closed, and the pair of body molds 50a and 50b and the bottom mold 50c are sealed. The blow-molded mold 50 is constructed. Next, air is press-fitted into the preform 10a, and biaxial stretch blow molding is performed on the composite preform 70.

As a result, the container body 10 can be obtained from the preform 10a 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 molding die 50, the preform 10a of the composite preform 70 and the plastic member 40a are integrally expanded. As a result, the preform 10a and the plastic member 40a are integrally shaped into a shape corresponding to the inner surface of the blow molding die 50.

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

Next, as shown in FIG. 8 (f), the pair of body molds 50a and 50b and the bottom mold 50c are separated from each other, and the composite container 10A is taken out from the blow molding mold 50.

Modification Example of Blow Molding Method Next, a modification of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. 9 (a) to 9 (f). The modified examples shown in FIGS. 9 (a) to 9 (f) have a function of contracting the plastic member (shrink tube) 40a with respect to the preform 10a, and the other configurations are shown in FIGS. 8 (a) to 8 (a). It is substantially the same as the form shown in (f). In FIGS. 9A to 9F, the same parts as those in FIGS. 8A to 8F are designated by the same reference numerals, and detailed description thereof will be omitted.

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

Next, a plastic member (shrink tube) 40a is provided on the outside of the preform 10a, which is composed of a plurality of layers and in which at least one of the plurality of layers is provided with a printing area 44a (see FIG. 9B). ). In this case, the plastic member (shrink tube) 40a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member (shrinkable tube) 40 is mounted so as to cover the entire body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire bottom portion 30a.

Next, the preform 10a and the plastic member (shrink tube) 40a are heated by the heating device 51 (see FIG. 9C). At this time, the preform 10a and the plastic member (shrink tube) 40a are uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a and the plastic member (shrink tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

When the plastic member (shrink tube) 40a is heated in this way, the plastic member (shrink tube) 40a is thermally shrunk and comes into close contact with the outside of the preform 10a (see FIG. 9C). When the plastic member (shrink tube) 40a itself has shrinkage, the plastic member (shrinkage) at the time when the plastic member (shrink tube) 40a is provided on the outside of the preform 10a (see FIG. 9B). The tube) 40a may be in close contact with the outside of the preform 10a.

Subsequently, the preform 10a and the plastic member (shrink tube) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 9D).

The preform 10a and the plastic member (shrink tube) 40a are molded using the blow molding die 50, and the container body 10 and the container body 10 and the plastic member (shrink tube) 40a are formed in substantially the same manner as in the cases of FIGS. 8A to 8F described above. A composite container 10A provided with a plastic member (shrink tube) 40 provided on the outer surface of the container body 10 can be obtained (see FIGS. 9 (d) to 9 (f)).

Next, other modifications of the blow molding method (method for manufacturing the composite container 10A) according to the present embodiment will be described with reference to FIGS. 10 (a) to 10 (g). In the modified example shown in FIGS. 10 (a) to 10 (g), a plastic member (shrink tube) 40a composed of a plurality of layers and having a printing area 44a provided in at least one of the plurality of layers is preformed. It has an action of shrinking with respect to 10a, and heats the preform 10a and the plastic member (shrink tube) 40a in two stages, and the other configurations are the same as those shown in FIGS. 8 (a) to 8 (f). It is almost the same. In FIGS. 10A to 10G, the same parts as those in FIGS. 8A to 8F are designated by the same reference numerals, and detailed description thereof will be omitted.

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

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

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

When the plastic member (shrink tube) 40a is heated, the plastic member (shrink tube) 40a is heat-shrinked and comes into close contact with the outside of the preform 10a. As a result, a composite preform 70 having the preform 10a and a plastic member (shrink tube) 40a in close contact with the outside of the preform 10a is obtained (see FIG. 10C).

In this way, the composite preform 70 is produced by heat-adhering the plastic member (shrink tube) 40a to the outside of the preform 10a in advance using the first heating device 55 to prepare the composite preform 70. A series of steps for producing (FIGS. 10 (a) to (c)) and a series of steps for producing the composite container 10A by blow molding (FIGS. 10 (d) to (g)) are performed at different locations (factory, etc.). It will be possible to carry out at.

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

Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 10E).

The composite preform 70 is molded using the blow molding die 50, and is provided on the container main body 10 and the outer surface of the container main body 10 in substantially the same manner as in the cases of FIGS. 8 (a) to 8 (f) described above. A composite container 10A provided with a shrink tube (shrink tube) 40 is obtained (see FIGS. 10 (e) to 10 (g)).

As described above, according to the present embodiment, the preform 10a of the composite preform 70 and the plastic member 40a are integrally formed by performing blow molding on the composite preform 70 in the blow molding mold 50. To prepare a composite container 10A having a container body 10 and a plastic member 40. As a result, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be made of separate members. 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 becomes necessary to prepare a new molding facility for manufacturing the composite container 10A. Absent.

Modifications Next, modifications of the first embodiment of the present invention will be described with reference to FIGS. 11, 12 and 13 (a) to 13 (f).

The modified examples shown in FIGS. 11, 12 and 13 (a) to 13 (f) have a body portion as a plastic member 40a which is composed of a plurality of layers and in which at least one of the plurality of layers is printed. It does not have a bottom and a bottom, but uses a cylindrical plastic member 40a.

In the composite container 10A shown in FIG. 11, the plastic member 40 extends from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but does not reach the bottom portion 30. Further, in the composite preform 70 shown in FIG. 12, the plastic member 40a is in close contact so as to cover only the body portion 20a of the preform 10a, and more specifically, the neck portion 13 of the container body 10 of the body portion 20a. It covers the area excluding the portion 13a corresponding to the portion 13a and the portion corresponding to the lower portion of the body portion 20a.

The other configurations in FIGS. 11, 12 and 13 (a) to 13 (f) are substantially the same as the embodiments shown in FIGS. 1 to 10. In the modified examples shown in FIGS. 11, 12 and 13 (a) to 13 (f), the same parts as those of the embodiments shown in FIGS. 1 to 10 are designated by the same reference numerals, and detailed description thereof will be omitted.

In addition, the configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiments shown in FIGS. 1 to 10, so detailed description thereof will be omitted. Further, in FIGS. 11, 12 and 13 (a) to 13 (f), the plastic member 40 having an action of contracting with respect to the preform 10a may be used.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. 14 to 23 are views showing a second embodiment of the present invention. In FIGS. 14 to 23, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be 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. 14 and 15.

As will be described later, the composite container 10A shown in FIGS. 14 and 15 is composed of a preform 10a, an inner label member 60a, and a plurality of layers by using a blow molding die 50, and is formed in at least one of the plurality of layers. The composite preform 70 (see FIG. 16) including the printed plastic member 40a is subjected to biaxial stretch blow molding, whereby the composite preform 70 is made of the preform 10a, the inner label member 60a, and the plastic. It is obtained by expanding the member 40a as a unit. Further, in FIG. 14, printing is applied to the outside of the outer surface layer of the plastic member 40 (printing area 44), but the printing is not limited to this, and the printing is applied to the inside of any layer constituting the plastic member 40a. It may be applied to the outside or it may be applied to the outside.

Such a composite container 10A is provided in close contact with the container body 10 made of a plastic material located inside, the inner label member 60 provided in close contact with the outside of the container body 10, and the outer side of the inner label member 60. The plastic member 40 is provided.

Of 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 body portion 20 provided below the shoulder portion 12, and a body. It is provided with a bottom portion 30 provided below the portion 20.

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

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

It is considered that at least a part of the plastic member 40 is translucent or transparent, and 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 translucent or transparent as a whole, or may have an opaque portion and a translucent or transparent portion (for example, a window portion). In this 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. The inner label member 60 (60a) is provided so as to surround the outside of the preform 10a as described later, and is obtained by biaxially stretching blow molding integrally with the preform 10a and the plastic member 40a. It is a thing.

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

The inner label member 60 may be provided in the entire area or a part of the container body 10 other than the mouth portion 11. For example, the inner label member 60 may be provided so as to cover the entire neck portion 13, shoulder portion 12, body portion 20, and bottom portion 30 of the container body 10 except for the mouth portion 11. Further, the number of inner label members 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 area as the plastic member 40, or may be provided in a narrower area than the plastic member 40. In the latter case, the inner label member 60 is preferably completely covered by the plastic member 40.

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

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

The plastic member 40 is attached to the outer surface of the inner label member 60 without being adhered, and is in close contact with the container body 10 so as not to move or rotate. The plastic member 40 is thinly stretched on the outer surface of the inner label member 60 to cover the inner label member 60. As shown in FIG. 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 of the first embodiment described above, detailed description thereof will be omitted here.

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

As shown in FIG. 16, the composite preform 70 includes a preform 10a made of a plastic material, a bottomed cylindrical inner label member 60a provided in close contact with the outer side of the preform 10a, and an inner label member 60a. It is composed of a plurality of layers provided in close contact with the outside, at least one of the plurality of layers is printed, and includes a bottomed cylindrical plastic member 40a.

The inner label member 60a is in close contact with the outer surface of the preform 10a, and is in close contact with the preform 10a in a state where it does not easily move or rotate. 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 pre-designed or printed. For example, in addition to the design, product name, and the like, 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 an image or characters on the composite container 10A without separately attaching a label or the like to the container body 10 after blow molding. For example, an inner label member 60a may be provided on all or a part of the body portion 20a of the preform 10a so that an image or characters can be displayed on the body portion 20 of the container body 10 after molding. This eliminates the need for a step of attaching a label using a labeler after sealing the container, so that the manufacturing cost can be suppressed and the yield can be prevented from being lowered.

As such an inner label member 60a, a film such as a polyester resin, a polyamide resin, a polyaramid resin, a polypropylene resin, a polycarbonate resin, a polyacetal resin, or a 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, as the inner label member 60a, various materials described below can also be used.

For example, the inner label member 60a may be made of a material having a gas barrier property such as an oxygen barrier property or a water vapor barrier property. In this case, without using a multi-layer preform or a preform containing a blended material as the preform 10a, the gas barrier property of the composite container 10A is enhanced, oxygen intrusion into the container is prevented, and the content liquid is prevented from deteriorating. In addition, it is possible to prevent the evaporation of water vapor from the inside of the container to the outside and prevent the content from being reduced. As such a material, PE (polyethylene), PP (polypropylene), MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorber such as a fatty acid salt may be mixed with these materials. Be done.

Further, the inner label member 60a may be made of a material having a light barrier property such as ultraviolet rays. In this case, it is possible to enhance the light barrier property of the composite container 10A and prevent the content liquid from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10a. As such a material, a blended material or a material obtained by adding a light-shielding resin to PET, PE, or PP can be considered.

Further, the inner label member 60a may be made of a material (material having low thermal conductivity) having higher heat retention or cold retention than the 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. As a result, the heat retention or cold retention of the composite container 10A is enhanced. As such a material, foamed polyurethane, polystyrene, PE (polyethylene), PP (polypropylene), phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin and the like can be considered.

On the other hand, the plastic member 40a is attached to the outer surface of the inner label member 60a without being adhered to 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 body portion 20a except for the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire bottom portion 30a.

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

Such a plastic member 40a may not have an action of contracting with respect to the preform 10a, or may have an action of contracting.

In the latter case, the plastic member (shrink tube) 40a may have an action of shrinking with respect to the preform 10a. As the plastic member (shrink tube) 40a, it is preferable to use one that shrinks (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 of the first embodiment described above, detailed description thereof will be omitted here.

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

As shown in FIG. 17A, the plastic member 40a (inner label member 60a) has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 41 (body portion 61) and a body portion 41 (body portion). It may have a bottom portion 42 (bottom portion 62) connected to 61). In this case, since the bottom 42 (bottom 62) of the plastic member 40a (inner label member 60a) covers the bottom 30a of the preform 10a, various functions are also provided for the bottom 30 in addition to the body 20 of the composite container 10A. And characteristics can be given.

Further, as shown in FIG. 17B, the plastic member 40a (inner label member 60a) has a circular tube shape (bottomless cylindrical shape) as a whole, and has a cylindrical body portion 41 (body portion 61). You may have. In this case, as the plastic member 40a (inner label member 60a), for example, an extrusion tube can be used.

Further, as shown in FIGS. 17 (c) and 17 (d), the plastic member 40a (inner label member 60a) may be manufactured by forming a film into a tubular shape and laminating its ends. good. In this case, as shown in FIG. 17 (c), the plastic member 40a may be formed in a pipe shape (bottomless cylindrical shape) having a body portion 41 (body portion 61), and is formed in FIG. 17 (d). As shown in the above, the bottom portion 42 (bottom portion 62) may be bonded to form a bottomed cylinder shape.

Next, the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. 18 (a) to 18 (f).

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

Next, a plastic member 40a is provided on the outside of the preform 10a, and is composed of a plurality of layers on the outside of the inner label member 60a, and at least one of the plurality of layers is printed. Is provided. As a result, a composite preform 70 having the preform 10a, the inner label member 60a adhered to the outer side of the preform 10a, and the plastic member 40a adhered to the outer side of the inner label member 60a is produced (FIG. 18). See (b)). In this case, the inner label member 60a has a bottomed cylindrical shape as a whole, and has a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

At this time, even if the inner label member 60a and the plastic member 40a having the same or slightly smaller inner diameter as the outer diameter of the preform 10a are pushed against the preform 10a, they are brought into close contact with the outer surface of the preform 10a. good. Alternatively, a heat-shrinkable inner label member 60a and a plastic member 40a are provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a are heat-shrinked by heating to 50 ° C. to 100 ° C. It may be brought into close contact with the outer surface of the preform 10a.

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

In this way, a series of steps for producing the composite preform 70 by bringing the plastic member 40a into close contact with the outside of the preform 10a and the inner label member 60a in advance to prepare the composite preform 70 (FIG. 18 (FIG. 18). It becomes possible to carry out a series of steps (FIGS. 18 (d) to (f)) for producing the composite container 10A by blow molding at different places (factory or the like).

Next, the composite preform 70 is heated by the heating device 51 (see FIG. 18C).

Subsequently, the composite preform 70 heated by the heating device 51 is sent to the blow molding die 50. The composite container 10A is molded using the blow molding die 50, and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the case of the first embodiment described above. A composite container 10A including the 60 and a plastic member 40 provided on the outside of the inner label member 60 is obtained (see FIGS. 18 (d)-(f)).

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

Modification Example of Blow Molding Method Next, a modification of the blow molding method (manufacturing method of the composite container 10A) according to the present embodiment will be described with reference to FIGS. 19 (a) to 19 (f). In the modification shown in FIGS. 19A to 19F, a plastic member (shrink tube) 40a composed of a plurality of layers and having printing is applied to at least one of the plurality of layers is used as the preform 10a. It has an action of contracting with respect to the other, and other configurations are substantially the same as the forms shown in FIGS. 18 (a) to 18 (f). In FIGS. 19A to 19F, the same parts as those in FIGS. 18A to 18F are designated by the same reference numerals, and detailed description thereof will be omitted.

First, a preform 10a made of a plastic material is prepared (see FIG. 19A).

Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member (shrink tube) 40a is provided on the outer side of the inner label member 60 (see FIG. 19B). The inner label member 60a and the plastic member (shrinkable tube) 40a are mounted so as to cover the entire body portion 20a except for 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 (shrink tube) 40a may be translucent or transparent.

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

Next, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are heated by the heating device 51 (see FIG. 19C). At this time, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are uniformly heated in the circumferential direction by the heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

When the plastic member (shrink tube) 40a is heated in this way, the plastic member (shrink tube) 40a is thermally shrunk and comes into close contact with the outside of the preform 10a (see FIG. 19C). When the plastic member (shrink tube) 40a itself has shrinkage, the plastic member (see FIG. 19B) when the plastic member (shrink tube) 40a is provided on the outside of the inner label member 60a. The shrink tube) 40a may be in close contact with the outside of the inner label member 60a.

Subsequently, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a heated by the heating device 51 are sent to the blow molding die 50 (see FIG. 19D).

The preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are molded using the blow molding die 50, and in substantially the same manner as in the cases of FIGS. 18A to 18F described above. A composite container 10A including a container body 10, an inner label member 60 provided on the outer surface of the container body 10, and a plastic member (shrink tube) 40 provided on the outside of the inner label member 60 can be obtained (FIG. 19 (d) to (f)).

Next, other modifications of the blow molding method (method for manufacturing the composite container 10A) according to the present embodiment will be described with reference to FIGS. 20 (a) to 20 (g). In the modification shown in FIGS. 20 (a) to 20 (g), a plastic member (shrink tube) 40a composed of a plurality of layers and having at least one of the plurality of layers printed is used as the preform 10a. The preform 10a and the plastic member (shrink tube) 40a are heated in two stages, and the other configurations are substantially the same as those shown in FIGS. 18 (a) to 18 (f). Is. In FIGS. 20 (a) to 20 (g), the same parts as those in FIGS. 18 (a) to 18 (f) are designated by the same reference numerals, and detailed description thereof will be omitted.

First, a preform 10a made of a plastic material is prepared (see FIG. 20A).

Next, the inner label member 60a is provided on the outer side of the preform 10a, and the plastic member (shrink tube) 40a is provided on the outer side of the inner label member 60a (see FIG. 20B). The plastic member (shrinkable tube) 40a is attached so as to cover the entire body portion 20a except for 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 (shrink tube) 40a may be translucent or transparent.

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

Next, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are heated by the first heating device 55 (see FIG. 20C). At this time, the heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a may be, for example, 50 ° C to 100 ° C.

When the plastic member (shrink tube) 40a is heated, the plastic member (shrink tube) 40a is heat-shrinked and comes into close contact with the outside of the preform 10a. As a result, a composite preform 70 having a preform 10a, an inner label member 60a adhered to the outside of the preform 10a, and a plastic member (shrink tube) 40a adhered to the outside of the inner label member 60a is obtained. (See FIG. 20 (c)).

In this way, the composite preform 70 is produced by heat-adhering the plastic member (shrink tube) 40a to the outside of the preform 10a and the inner label member 60a in advance using the first heating device 55. A series of steps for producing the composite preform 70 (FIGS. 20 (a) to (c)) and a series of steps for producing the composite container 10A by blow molding (FIGS. 20 (d) to (g)) are separated. It will be possible to carry out at a place (factory, etc.).

Next, the composite preform 70 is heated by the second heating device 51 (see FIG. 20D). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while rotating with the mouth portion 11a facing downward. The heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a in this heating step may be, for example, 90 ° C to 130 ° C.

Subsequently, the composite preform 70 heated by the second heating device 51 is sent to the blow molding die 50 (see FIG. 20E).

The composite preform 70 is molded using the blow molding die 50, and is provided on the container body 10 and the outer surface of the container body 10 in substantially the same manner as in the cases of FIGS. 18A to 18F described above. A composite container 10A including the inner label member 60 and the plastic member (shrink tube) 40a provided on the outer side of the inner label member 60 can be obtained (see FIGS. 20 (e) to 20 (g)).

As described above, according to the present embodiment, by performing blow molding on the composite preform 70 in the blow molding mold 50, the preform 10a of the composite preform 70, the inner label member 60a, and the plastic The manufacturing member 40a is integrally expanded to manufacture a composite container 10A including the container body 10, the inner label member 60, and the plastic member 40. Therefore, the inner label member 60 can be provided in advance on 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 step of filling the composite container 10A with the content liquid, sealing the container, and then labeling with a labeler. As a result, the manufacturing cost for manufacturing the final product can be suppressed.
In addition, it is possible to prevent the yield from being lowered when the final product is manufactured due to a defect of the labeler or the like.

Further, according to the present embodiment, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be composed of separate members. 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 becomes necessary to prepare a new molding facility for manufacturing the composite container 10A. Absent.

Modifications Next, modifications of the present invention will be described with reference to FIGS. 21, 22 and 23 (a) to 23 (f).

The modified examples shown in FIGS. 21, 22 and 23 (a) to 23 (f) are made of plastic, which is composed of an inner label member 60a and a plurality of layers, and at least one of the plurality of layers is printed. The member 40a does not have a body and a bottom, but uses a cylindrical inner label member 60a and a plastic member 40a.

In the composite container 10A shown in FIG. 21, the inner label member 60 and the plastic member 40 extend from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but do not reach the bottom portion 30. Further, in the composite preform 70 shown in FIG. 22, the inner label member 60a and the plastic member 40a are in close contact with each other so as to cover only the body portion 20a of the preform 10a. It covers 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 body portion 20a.

The other configurations in FIGS. 21, 22 and 23 (a) to 23 (f) are substantially the same as the embodiments shown in FIGS. 14 to 20. In the modified examples shown in FIGS. 21, 22 and 23 (a) to 23 (f), the same parts as those of the embodiments shown in FIGS. 14 to 20 are designated by the same reference numerals, and detailed description thereof will be omitted.

In addition, the configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiments shown in FIGS. 14 to 20, so detailed description thereof will be omitted. Further, in FIGS. 21, 22 and 23 (a) to 23 (f), the plastic member 40 having an action of contracting with respect to the preform 10a may be used.

Claims (13)

In the method of manufacturing a composite container
The process of preparing a preform made of plastic material and
A step of providing a plastic member composed of a plurality of layers on the outside of the preform, and
A step of expanding the preform and the plastic member as a unit by performing blow molding on the preform and the plastic member is provided.
At least one of the plurality of layers of the plastic member is printed.
The plastic member is provided in close contact with the preform without being adhered to the preform.
The plastic member does not have a bonding portion and has no bonding portion.
A method for manufacturing a composite container, characterized in that the plastic member is provided with a cutting line for peeling and removing the plastic member. The method for manufacturing a composite container according to claim 1, wherein the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer. The method for producing a composite container according to claim 1 or 2, wherein the printed layer is formed of a resin material containing PE, PP and / or PET. The method for manufacturing a composite container according to any one of claims 1 to 3, wherein the plastic member is a shrinkable tube. In compound preform,
Preform made of plastic material and
It is provided on the outside of the preform and includes a plastic member composed of a plurality of layers.
The plastic member is in close contact with the outside of the preform.
At least one of the plurality of layers of the plastic member is printed.
The plastic member is provided in close contact with the preform without being adhered to the preform.
The plastic member does not have a bonding portion and has no bonding portion.
A composite preform characterized in that the plastic member is provided with a cutting line for peeling and removing the plastic member. The composite preform according to claim 5, wherein the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer. The composite preform according to any one of claims 5 or 6, wherein the printed layer is formed of a resin material comprising PE, PP and / or PET. The composite preform according to any one of claims 5 to 7, wherein the plastic member is a shrinkable tube. In a composite container
The container body made of plastic material and
It is provided in close contact with the outside of the container body, and includes a plastic member composed of a plurality of layers.
The container body and the plastic member are integrally expanded by blow molding.
At least one of the plurality of layers of the plastic member is printed.
The plastic member is provided in close contact with the container body without being adhered to the container body.
The plastic member does not have a bonding portion and has no bonding portion.
A composite container characterized in that the plastic member is provided with a cutting line for peeling and removing the plastic member. The composite container according to claim 9, wherein the plastic member includes an outer surface layer, an intermediate layer, and an inner surface layer. The composite container according to claim 9 or 10, wherein the printed layer is formed of a resin material containing PE, PP and / or PET. The composite container according to any one of claims 9 to 11, wherein the plastic member is a shrinkable tube. The preform and the plastic member which is attached to the outside of the preform without being adhered to the outside of the preform by being mounted on the outside of the preform made of a plastic material and inflated together with the preform. It is a plastic member for manufacturing a composite container to have
Consists of multiple layers
At least one of the plurality of layers is printed.
The plastic member does not have a bonding portion and has no bonding portion.
A plastic member characterized in that the plastic member is provided with a cutting line for peeling and removing the plastic member.

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