JP7057887B2 - In-mold label container and label - Google Patents

Description

The present invention particularly relates to an in-mold label container and a label capable of suppressing the occurrence of wrinkles on the label in a curved portion.

The in-mold label container is obtained by setting a label having a heat-sealing layer in a mold in advance at the time of injection molding and fusing the heat-sealing layer of the label to the surface of the injection resin by the heat of the resin at the time of molding. ..

As an in-mold label container using a gas barrier label, an in-mold label container having a polygonal tubular body and bottom having a plurality of flat side surfaces is known. In such an in-mold label container, a label having a strong waist and a high gas barrier property is fixed as an insert material to the body and the bottom. Thereby, it is possible to provide an in-mold label container having a barrier property in which the mechanical strength of the entire container is enhanced by the strength of the label. Here, as the label, a label in which a base material layer made of strong paper or synthetic paper and a barrier layer made of a gas barrier synthetic resin material are laminated is used. The label also has a bottom label and a body label connected to the bottom label, and the body label has side labels that correspond to the sides of the container and are separated from each other.

However, in a conventional in-mold label container, the side label may be wrinkled, especially at the curved portion between the two adjacent sides and the bottom, and if the side label is wrinkled, the in-mold label container will appear. Defects occur.

Japanese Unexamined Patent Publication No. 8-325317

The present invention has been made in consideration of such a point, and provides an in-mold label container and a label in which the side label is not wrinkled particularly in the curved portion between two adjacent side surfaces and the bottom. The purpose is to do.

The present invention is an in-mold label container having a polygonal tubular body having a plurality of flat side surfaces and a bottom, comprising a label and an injection resin injected onto the label, wherein the label is said to be described above. It has a side label corresponding to the side surface of the body portion and a bottom label corresponding to the bottom portion, and a notch is formed between the side surface label corresponding to two adjacent side surfaces of the label and the bottom label. This notch is an in-mold label container provided at least on each side label and defined by an inwardly drawn arcuate outer edge.

The present invention is an in-mold label container in which the label has a corresponding connection between one side and a bottom.

The present invention is an in-mold label container in which the notch is provided on the bottom label and is defined by an arcuate outer edge that projects outward.

The present invention relates to a label used for an in-mold label container having a polygonal tubular body portion having a plurality of flat side surfaces and a bottom portion, wherein the label is a side label corresponding to the side surface of the body portion and the same. It has a bottom label corresponding to the bottom, and a notch is formed between the side label corresponding to two adjacent side surfaces of the label and the bottom label, and this notch is provided on at least each side label. A label defined by an arcuate outer edge that pulls inward.

INDUSTRIAL APPLICABILITY The label is a label having a corresponding connecting portion between one side surface and the bottom portion.

The present invention is a label in which the notch is provided on the bottom label and is defined by an arcuate outer edge that projects outward.

As described above, according to the present invention, wrinkles do not occur on the label at the curved portion between the two adjacent side surfaces and the bottom portion.

FIG. 1A is a side sectional view showing an in-mold label container according to an embodiment of the present invention. FIG. 1B is a plan view showing an in-mold label container according to an embodiment of the present invention. FIG. 2 is a bottom view showing an in-mold label container. FIG. 3 is a side view showing an in-mold label container. FIG. 4 is a side view of the in-mold label container as viewed from a direction different from that of FIG. 3 by 90 °. FIG. 5 is a developed view showing a label having a body label and a bottom label. FIG. 6 is a side sectional view showing a laminated structure of a sheet molded body. FIG. 7 is an assembly drawing showing a label having a body label and a bottom label. FIG. 8 is a side sectional view showing a laminated structure of labels. FIG. 9A is a diagram showing a method for manufacturing an in-mold label container according to the present invention. FIG. 9B is a diagram showing a method for manufacturing an in-mold label container according to the present invention. FIG. 9C is a diagram showing a method for manufacturing an in-mold label container according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1A to 9C are diagrams showing embodiments of the present invention.

As shown in FIGS. 1A and 1B, the in-mold label container 10 includes a substantially polygonal cylindrical body having a flange portion 14, for example, a square cylindrical body portion 11, and a bottom portion 12 connected below the body portion 11. ing. In this case, the body portion 11 has four flat side surfaces 11a, 11b, 11c, 11d. Further, a three-dimensionally formed curved portion 15 is formed between two adjacent side surfaces, for example, the side surfaces 11a and 11b and the bottom portion 12.

Further, the in-mold label container 10 has a sheet molded body 3 having a gas barrier property, a label 4 having a gas barrier property, and an injection resin 8 interposed between the sheet molded body 3 and the label 4. ..

Of these, the sheet molded body 3 is located inside the injection resin 8, and has a body sheet 3a corresponding to the body 11, a bottom sheet 3b corresponding to the bottom 12, and a flange sheet 3c corresponding to the flange 14. It has a container shape that includes it, and has a gas barrier property as a whole. Further, a gate receiving portion 33 is formed in the central portion of the bottom sheet 3b of the sheet molded body 3. Although the in-mold label container 10 according to the present embodiment has the sheet molded body 3, it is not always necessary to provide the sheet molded body 3.

Further, the label 4 is located outside the injection resin 8, includes a body label 5 corresponding to the body 11, and a bottom label 7 corresponding to the bottom 12, and has a gas barrier property as a whole. Further, a gate hole 7a for injecting the injection resin 8 is formed in the center of the bottom label 7 (see FIGS. 6 to 8). The gas barrier property referred to here has at least an oxygen barrier property, but may have a water vapor barrier property.

Further, as shown in FIGS. 5 and 7, the body label 5 and the bottom label 7 constituting the label 4 are integrally formed. The body label 5 has four side labels 5a, 5b, 5c, and 5d extending outward from the peripheral edge of the bottom label 7. The four side labels 5a, 5b, 5c, and 5d correspond to the flat side surfaces 11a, 11b, 11c, and 11d of the in-mold label container 10, respectively.

Further, the body label 5 does not exist between the side labels 5a, 5b, 5c, and 5d of the body label 5, and a gap is formed.

Here, the shape of the label 4 will be further described with reference to FIG. As shown in FIG. 5, there is no label between the two adjacent sides of the body 11 of the label 4, for example, the side labels 5a and 5b corresponding to the sides 11a and 11b, and the bottom label 7 and the notch 5A. Is formed. The notch 5A is defined by an inwardly retractable arcuate outer edge 41 formed on two adjacent side surface labels 5a and 5b and an outwardly projecting arcuate outer edge 42 formed on the bottom label 7.

In this way, by providing the notch 5A between the side labels 5a and 5b corresponding to the two adjacent side surfaces 11a and 11b and the bottom label 7, the three dimensions between the side surfaces 11a and 11b and the bottom 12 are provided. The side labels 5a and 5b are not present on the curved portion 15 formed in the above. Normally, in the in-mold label container 10, if the side surface label is present on the curved portion 15 formed three-dimensionally, the side surface label does not stretch, so that the curved surface portion 15 is wrinkled. In particular, when the side labels 5a, 5b, 5c, and 5d are present in the curved portion 15, wrinkles are generated on the side labels 5a, 5b, 5c, and 5d.

On the other hand, according to the present embodiment, since the side labels 5a, 5b, 5c, and 5d do not exist in the curved portion 15 formed three-dimensionally, the label 4, particularly the side labels 5a, 5b, 5c, and 5d. No wrinkles occur.

On the other hand, in the in-mold label container 10, the parts other than the curved portion formed three-dimensionally, particularly the bottom portion 12, the side surfaces 11a, 11b, 11c, and 11d, are the bottom label 7 and the side surface label 5a of the corresponding labels 4, respectively. The gas barrier property can be enhanced by 5b, 5c, and 5d. Further, the side surface label 5a and the bottom label 7 are connected via the connecting portion 6 corresponding to one side surface of the in-mold label container 10, for example, between the side surface 11a and the bottom portion 12, and the side surface 11a and 11b are connected to each other. , 11c, 11d and the bottom 12 enhance the gas barrier property.

By the way, the notch 5A of the label 4 is formed by an arc-shaped outer edge 41 formed on the side labels 5a, 5b, 5c, and 5d and drawn inward, and an arc-shaped outer edge 42 formed on the bottom label 7 and projecting outward. Although defined, the distance l between the opposing arcuate outer edges 41 of the side labels 5a, 5b, 5c, and 5d that define the notch 5A is 21 mm to 24 mm, preferably 18 mm.

As described above, since the body label 5 and the bottom label 7 both include a layer having a gas barrier property, the label 4 having the body label 5 and the bottom label 7 has a high gas barrier property. In this case, the body labels 5 do not overlap each other because the side labels 5a, 5b, 5c, and 5d are separated from each other by the notch 5A.

By the way, as shown in FIGS. 1A and 1B, the body portion 11 of the in-mold label container 10 has a flange portion 14. The flange portion 14 has a flange portion sheet 3c provided at the upper end of the body sheet 3a of the sheet molded body 3 and an injection resin 8 injected onto the flange portion sheet 3c.

The contents are filled in the in-mold label container 10 having such a structure. Next, the lid material 30 composed of the aluminum layer 30a and the heat seal layer 30b is adhered to the flange portion 14 of the in-mold label container 10, and the in-mold label container 10 is sealed.

By the way, the sheet molded body 3 includes a body sheet 3a having a flange sheet 3c and a bottom sheet 3b as described above, and has a container shape. In this case, the sheet molded body 3 is composed of a sheet-shaped laminated body 23 having a layer structure as shown in FIG.

That is, as shown in FIG. 6, the laminate 23 constituting the sheet molded body 3 has a polypropylene layer (PP) 23a as a sequentially arranged synthetic resin layer and an ethylene vinyl alcohol co-weight as a gas barrier layer having a gas barrier property. It includes a coalesced layer (EVOH) 23b and a polypropylene layer (PP) 23c as an adhesive layer adhered to the injection resin 8.

Then, by vacuum forming the sheet-shaped laminated body 23 configured in this way, the sheet molded body 3 having a container shape can be obtained.

Next, the label 4 including the body label 5 and the bottom label 7 will be described below.
The label 4 having the body label 5 and the bottom label 7 is composed of a laminated body 24 having a layer structure as shown in FIG.

That is, as shown in FIG. 8, the label 4 having the body label 5 and the bottom label 7 has (i) an adhesive layer 24a with an injection resin, (ii) a synthetic resin layer 24b, and (iii) a gas barrier layer 24c. And (iv) the printing substrate layer 24d (here, the layer (i) and the layer (ii) can be used in combination). Each of these layers 24a, 24b, 24c, and 24d is independently formed into a film and bonded (dry lamination) via an adhesive, or a part or all of the layers are melt-extruded (EC, co-extruded). It can also be formed by. Further, the printing substrate layer can be omitted depending on the application and purpose.

The adhesive layer 23a is not particularly limited as long as it adheres to the injection resin, but usually has adhesiveness such as plastic having the same material as the injection resin or polyethylene containing EVA (ethylene / vinyl acetate copolymer). A plastic film or the like, which has a resin or a plastic film in which the resin is co-extruded or coated, can be preferably used.

The film as the printing substrate layer 24d is not particularly limited as long as it is generally printable, and for example, a polyester film, a polypropylene film, a nylon film, or the like can be appropriately used.

The gas barrier layer 24c includes, for example, (a) an aluminum foil (7 to 25 μm), (b) a metal or a metal oxide laminated on a plastic film or the like by vapor deposition or the like, for example, a silicon oxide vapor deposition plastic film or aluminum oxide vapor deposition. Examples thereof include plastic films, aluminum vapor-deposited plastic films, (c) and others, polyacrylonitrile-based resins, EVOH (ethylene vinyl alcohol copolymer), PVDC (polyvinylidene chloride) films, PVDC-coated biaxially stretched plastic films, and the like, which are desired. It can be appropriately selected according to the performance. When the sheet molded body 3 has sufficient gas barrier properties, the label 4 does not necessarily have to have the gas barrier layer 24c.

Further, polypropylene (PP) can be used as the synthetic resin layer 24b.

Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method or another coating method according to a conventional method.

Specifically, as the label 4 having the body label 5 and the bottom label 7, for example, a label having the following layer structure can be used.

(1) Heat seal stretched polypropylene layer (HSOPP) 30μ / aluminum foil 7μ / stretched polypropylene layer (OPP) 30μ
(2) Heat-sealed stretched polypropylene layer (HSOPP) 30μ / VM-PET12 / stretched polypropylene layer (OPP) 30μ
(3) Heat sealant coating / stretched polypropylene layer (OPP) 30μ / aluminum foil 7μ / stretched polypropylene layer (OPP) 30μ

Further, as the injection resin 8 used in the in-mold label container 10 of the present invention, an injection-moldable thermoplastic resin such as polypropylene, polyethylene, polystyrene or the like can be used.

Next, a method for manufacturing the in-mold label container will be described with reference to FIGS. 9A, 9B and 9C.
First, the sheet-shaped laminated body 23 is vacuum-formed to obtain a sheet-shaped body 3 having a container shape. Further, a label 4 having a body label 5 and a bottom label 7 is prepared.

Next, as shown in FIG. 9A, a mold 20 having a cavity 22 and a core 21 is prepared, and the sheet molded body 3 is adsorbed on the core 21 of the mold 20.

Next, as shown in FIG. 9B, the label 4 is adsorbed on the cavity 22 of the mold 20.

Next, the core 21 is brought close to the cavity 22, the core 21 is inserted into the cavity 22, and the cavity 22 and the core 21 are molded (see FIG. 9C).

In this state, the injection resin 8 is injected into the space between the cavity 22 and the core 21 from the injection resin gate (pouring port) 22a provided in the cavity 22 (FIG. 9C). In this case, the spout 22a is formed in the protrusion 22b formed in the cavity 22, and the spout 22a formed in the protrusion 22b penetrates the gate hole 7a of the bottom label 7 and enters the mold 20. It stands out. Further, the injection resin 8 ejected from the spout 22a penetrates between the sheet molded body 3 and the label 4 through the gate hole 7a provided in the label 4, and the injection resin 8 causes the sheet molded body 3 and the label 4 to enter. Is adhered, and thus the in-mold label container 10 is obtained.

As described above, according to the present embodiment, as described above, the curved portion 15 formed three-dimensionally between the two adjacent side surfaces 11a and 11b of the body portion 11 of the in-mold label container 10 and the bottom portion 12. Since the side labels 5a, 5b, 5c, and 5d are not present on the label 4, the side labels 5, especially the side labels 5a, 5b, 5c, and 5d are not wrinkled. Therefore, the appearance of the in-mold label container 10 does not deteriorate in the three-dimensionally formed curved portion 15.

Further, since the in-mold label container 10 has a sheet molded body 3 having a gas barrier property and a container shape, a label 4 having a gas barrier property, and an injection resin interposed between the sheet molded body 3 and the label 4. Even if the label does not exist in the curved portion 15 formed in three dimensions, the gas barrier property of the in-mold label container 10 as a whole can be maintained by the sheet molded body.

Further, since the label 4 is arranged outside the injection resin 8 and includes the printing base material layer 24d, the design of the in-mold label container 10 can be improved.

In the above embodiment, an example is shown in which the sheet molded body 3 is located inside the injection resin 8 and the label 4 is located outside the injection resin 8, but the present invention is not limited to this, and the sheet molded body 3 is an injection resin. The label 4 may be arranged on the outside of the injection resin 8 and may be arranged on the inside of the injection resin 8.

3 Sheet molded body 3a Body sheet 3b Bottom sheet 3c Flange sheet 4 Label 5 Body label 5A Notch 5a, 5b, 5c, 5d Side label 6 Connecting part 7 Bottom label 8 Injection resin 10 In-mold label Container 11 Body 12 Bottom 14 Flange 15 Curved 20 Mold 21 Core 22 Cavity 22a Outlet 23 Laminate 23a Synthetic resin layer 23b Gas barrier layer 23c Adhesive layer 24 Laminate 24a Adhesive layer 24b Synthetic resin layer 24c Gas barrier layer 24d Printing substrate layer 41 Arc-shaped outer edge 42 Arc-shaped outer edge

Claims (4)

In an in-mold label container with a square cylindrical body with four flat sides and a square bottom.
With a label and an injection resin injected onto this label,
The label has four side labels corresponding to the sides of the body and a square bottom label having four corners corresponding to the bottom, corresponding to two adjacent sides of the label. A notch is formed between the two side labels and the corner of the bottom label, and the notch is provided at least on each side label and has an arcuate outer edge that is drawn inward and the corner of the bottom label. The radius of the arcuate outer edge, which is defined by the arcuate outer edge protruding outward of the bottom label and which is drawn inward of the opposing side label forming the notch, is the arcuate outer edge of the bottom label. In-mold label container larger than the radius . The in-mold label container according to claim 1, wherein the label has a corresponding connecting portion between each side surface and a bottom portion. In a label used for an in-mold label container having a square cylindrical body with four flat sides and a quadrangular bottom.
The label has four side labels corresponding to the sides of the body and a square bottom label having four corners corresponding to the bottom, corresponding to two adjacent sides of the label. A notch is formed between the two side labels and the corner of the bottom label, and the notch is provided at least on each side label and has an arcuate outer edge that is drawn inward and the corner of the bottom label. The radius of the arcuate outer edge, which is defined by the arcuate outer edge protruding outward of the bottom label and which is drawn inward of the opposing side label forming the notch, is the arcuate outer edge of the bottom label. A label that is larger than the radius . The label according to claim 3, wherein the label has a corresponding connecting portion between each side surface and a bottom portion.

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