JP2018090335A - In-mold labeled container and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-mold labeled container having excellent gas barrier property.SOLUTION: The in-mold labeled container 10 comprises a body portion 11 and a bottom portion 1. The in-mold labeled container 10 includes a sheet molded body 3 having a container shape and having gas barrier ability, a label 4 having gas barrier ability, and an injected resin 8 disposed between the sheet molded body 3 and the label 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an in-mold label container capable of obtaining a reliable gas barrier property and a method for producing the same.

  An in-mold label container is obtained by setting a label having a heat seal layer on a mold in advance during injection molding and fusing the heat seal layer of the label to the injection resin surface with the heat of the resin during molding. .

  As an in-mold label container using a gas barrier label, an in-mold label container having a body part and a bottom part is known. In such an in-mold label container, a label having a strong waist and a high gas barrier property is fixed to the trunk portion and the bottom portion as an insert material. Thereby, the in-mold label container which has the barrier property which raised the mechanical strength of the whole container with the strength of the waist of a label can be provided. Here, a label in which a main body layer made of strong paper or synthetic paper and a barrier layer made of a synthetic resin material having a gas barrier property are used as the label.

  However, in the conventional in-mold label container, the label is fixed to the body part, and a gap is formed between the edges of the label of the body part. For this reason, there is a problem that the gas barrier property is lowered by the gap between the edges of the label.

JP-A-8-132477

  The present invention has been made in consideration of the above points, and provides an in-mold label container and a method for manufacturing the same that can obtain a reliable gas barrier property even when a gap is formed between the edges of the label of the body part. The purpose is to provide.

  The present invention relates to an in-mold label container having a body part and a bottom part, and includes a body sheet and a bottom sheet, a sheet molded body having a container shape and having gas barrier properties, and at least a bottom label and a body part. And a label having a gas barrier property and an injection resin interposed between the sheet molded body and the label, and a gate hole for injecting the injection resin into the label is formed. It is a mold label container.

  The present invention is the in-mold label container characterized in that the sheet molded body is located inside the injection resin and the label is located outside the injection resin.

  The present invention is the in-mold label container, wherein the label has a printing base material layer.

  The present invention is the in-mold label container in which the body part label and the bottom part label are integrally formed.

  The present invention is the in-mold label container characterized in that the barrel portion has a flange portion at an upper end thereof, and the flange portion has a flange portion sheet provided at the upper end of the barrel portion sheet and an injection resin.

  The present invention provides a method for producing an in-mold label container, including a body sheet and a bottom sheet, a sheet molded body having a container shape and having gas barrier properties, at least a bottom label and a body label, and a gas barrier. For preparing a label having a property and having a gate hole formed therein, mounting the sheet molded body and the label in the mold, and between the sheet molded body and the label from the gate hole of the label in the mold. And a step of injecting an injection resin into the in-mold label container manufacturing method.

  The present invention is the method for manufacturing an in-mold label container, wherein the sheet molded body is located inside the injection resin and the label is located outside the injection resin.

  This invention is a manufacturing method of the in-mold label container characterized by a label having a printing base material layer.

  The present invention is the method for manufacturing an in-mold label container, wherein the body label and the bottom label are integrally formed.

  The present invention provides a method for producing an in-mold label container, characterized in that the body portion has a flange portion at the upper end thereof, and the flange portion has a flange portion sheet provided at the upper end of the body portion sheet and an injection resin. It is.

  As described above, according to the present invention, the gas barrier property of the in-mold label container can be improved even when a gap is formed between the end edges of the label of the body portion.

FIG. 1 is a side sectional view showing an in-mold label container according to an embodiment of the present invention. FIG. 2 is a plan view showing an in-mold label container. FIG. 3 is a perspective view showing an in-mold label container. FIG. 4 is a perspective view showing a sheet molded body. FIG. 5 is a plan view showing a sheet molded body. FIG. 6 is a side sectional view showing a laminated structure of a sheet molded body. FIG. 7A is a development view showing a label having a trunk label and a bottom label, and FIG. 7B is an assembly view showing the trunk label and the bottom label. FIG. 8 is a side sectional view showing a laminated structure of labels. FIGS. 9A, 9B and 9C are views showing a method for producing an in-mold label container according to the present invention.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 9 are diagrams showing an embodiment of the present invention.

  As shown in FIGS. 1 to 3, the in-mold label container 10 includes a substantially hexagonal cylindrical body portion 11 having a flange portion 14, and a bottom portion 12 connected to the lower portion of the body portion 11.

  The in-mold label container 10 includes 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. .

  Among them, the sheet molded body 3 is located inside the injection resin 8, and includes a body sheet 3 a corresponding to the body 11, a bottom sheet 3 b corresponding to the bottom 12, and a flange section sheet 3 c corresponding to the flange 14. It has a container shape including it and has a gas barrier property as a whole (see FIGS. 4 to 6).

  The label 4 is located outside the injection resin 8 and 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. A gate hole 7a for injecting the injection resin 8 is formed in the center of the bottom label 7 (see FIGS. 7 to 8). The gas barrier property here has at least an oxygen barrier property, but may have a water vapor barrier.

  Further, as shown in FIGS. 7A and 7B, the body label 5 and the bottom label 7 constituting the label 4 are integrally formed. The body label 5 has a plurality of portions 5a, 5b, 5c, 5d, 5e, 5f, 5g, and 5h that extend outward from the periphery of the bottom label 7.

  Further, between the respective portions 5a, 5b, 5c, 5d, 5e, 5f, 5g, and 5h of the body label 5, the respective portions 5a, 5b, 5c, 5d, 5e, 5f, 5g, and 5h are overlapped with each other so as to overlap each other. Is forming.

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 portion label 5 forms the overlapping portion 5A by overlapping the portions 5a, 5b, 5c, 5d, 5e, 5f, 5g, and 5h. For this reason, no gap is formed between the portions 5a, 5b, 5c, 5d, 5e, 5f, 5g, and 5h of the body label 5, thereby improving the gas barrier property of the in-mold label container 10 as a whole. Can be made.

  By the way, as shown in FIG. 1 thru | or FIG. 3, the trunk | drum 11 of the in-mold label container 10 has the flange part 14. As shown in FIG. And this flange part 14 has the flange part sheet | seat 3c provided in the trunk | drum sheet | seat 3a upper end of the sheet molded object 3, and the injection resin 8 inject | poured on this flange part sheet | seat 3c.

  The in-mold label container 10 having such a configuration is filled with contents. Next, the lid member 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.

Next, the sheet molded body 3 will be described with reference to FIGS.
The sheet molded body 3 includes the trunk portion sheet 3a having the flange portion sheet 3c and the bottom portion sheet 3b as described above, and has a container shape. In this case, the sheet molded body 3 is composed of a sheet-like laminate 23 having a layer configuration as shown in FIG.

  That is, as shown in FIG. 6, the laminate 23 constituting the sheet molded body 3 is composed of a polypropylene layer (PP) 23a as a synthetic resin layer sequentially disposed from the outside and ethylene vinyl alcohol as a gas barrier layer having gas barrier properties. It includes a copolymer layer (EVOH) 23b and a polypropylene layer (PP) 23c as an adhesive layer.

  And the sheet molded body 3 which has a container shape can be obtained by performing vacuum forming with respect to the sheet-like laminated body 23 comprised in this way.

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

  That is, as shown in FIG. 8, the label 4 having the body part label 5 and the bottom part label 7 includes (i) an adhesive layer 24a with an injection resin, (ii) a printing base material layer 24b, and (iii) a gas barrier layer. 24c and (iv) a synthetic resin layer 24d (here, the layer (i) and the layer (ii) can be used together). 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. Moreover, a printing base material layer can also be abbreviate | omitted according to a use and the objective.

  The adhesive layer 23a is not particularly limited as long as it adheres to the injection resin. Usually, the adhesive layer 23a has an adhesive property such as a plastic made of the same material as the injection resin and polyethylene containing EVA (ethylene / vinyl acetate copolymer). A resin film or a plastic film on which these resins are coextruded or coated can be preferably used.

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

  Examples of the gas barrier layer 24c include (a) aluminum foil (7 to 25 μm), (b) a metal or metal oxide laminated on a plastic film by vapor deposition, for example, silicon oxide vapor deposition plastic film, aluminum oxide vapor deposition Plastic film, aluminum vapor-deposited plastic film, (c) other, polyacrylonitrile resin, EVOH (ethylene vinyl alcohol copolymer), PVDC (polyvinylidene chloride) film, PVDC coated biaxially stretched plastic film, etc. It can be appropriately selected according to the performance.

  As the synthetic resin layer 24d, polypropylene (PP) can be used.

  In addition, each said layer is formed in accordance with a conventional method by the dry lamination method, the extrusion lamination method, the extrusion coating method, and other coating methods.

Specifically, as the label 4 having the body part label 5 and the bottom part label 7, for example, a label having the following layer configuration 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) 30 μ / aluminum foil 7 μ / stretched polypropylene layer (OPP) 30 μ

  Moreover, as the injection resin 8 used for 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.
First, the sheet-shaped laminate 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 to the core 21 of the mold 20.

  Next, as shown in FIG. 9B, the label 4 is adsorbed in 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 clamped.

  In this state, the injection resin 8 is injected into the space between the cavity 22 and the core 21 from the injection resin injection port 22a provided in the cavity 22 (FIG. 9C). In this case, the injection resin 8 injected from the spout 22 a enters between the sheet molded body 3 and the label 4 through the gate hole 7 a provided in the label 4, and the sheet molded body 3 and the label are injected by the injection resin 8. 4 is bonded, and the in-mold label container 10 is thus obtained.

  The in-mold label container 10 obtained in this way is taken out from the mold 20 outward.

  As described above, according to the present embodiment, the in-mold label container 10 has a gas-barrier sheet-shaped article 3 having a container shape, a gas-barrier label 4, and the sheet-molded article 3 and the label 4. Therefore, even if a gap is generated at the edge of the label 4, the gas barrier property of the in-mold label container 10 as a whole can be maintained by the sheet molded body.

  Moreover, since the label 4 is arrange | positioned on the outer side of the injection resin 8, and the printing base material layer 24b is included, the design property of the in-mold label container 10 can be improved.

  In the above-described embodiment, an example 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 is shown. The label 4 may be disposed inside the injection resin 8.

3 Sheet molded body 3a Body sheet 3b Bottom sheet 3c Flange sheet 4 Label 5 Body label 5A Overlapping part 5a,..., 5h Part 7 Bottom label 8 Injection resin 10 In-mold label container 11 Body 12 Bottom part 14 Flange Part 20 Mold 21 Core 22 Cavity 22a Inlet 23 Laminate 23a Synthetic resin layer 23b Gas barrier layer 23c Adhesive layer 24 Laminate 24a Adhesive layer 24b Printing substrate layer 24c Gas barrier layer 24d Synthetic resin layer 30 Lid 30a Aluminum layer 30b Heat Seal layer

Claims (8)

In the in-mold label container provided with the trunk and the bottom,
A sheet molded body including a trunk sheet and a bottom sheet, having a container shape, and having gas barrier properties,
A label including at least a bottom label and a body label;
An injection resin interposed between the sheet molding and the label, forming a gate hole for injecting the injection resin into the label, having a gas barrier property, and having a container shape, and the injection resin And an in-mold label container, wherein the labels are sequentially arranged from the inside to the outside to form a three-layer structure.   The in-mold label container according to claim 1, wherein the label has a printing base material layer.   The in-mold label container according to claim 1 or 2, wherein the body part label and the bottom part label are integrally formed.   4. The inboard according to claim 1, wherein the body portion has a flange portion at an upper end thereof, and the flange portion includes a flange portion sheet provided at an upper end of the body portion sheet and an injection resin. Mold label container. In the method of manufacturing an in-mold label container,
Including a body sheet and a bottom sheet, having a container shape and having a gas barrier property, at least a bottom label and a body label, and preparing a label in which a gate hole is formed;
Attaching the sheet compact and label in the mold;
A step of injecting an injection resin between the sheet molded body and the label from the gate hole of the label into the mold, and a sheet molded body having a gas barrier property and having a container shape, the injection resin, and the label A method for producing an in-mold label container, wherein a three-layer structure is formed by sequentially arranging from the inside toward the outside.   6. The method for producing an in-mold label container according to claim 5, wherein the label has a printing substrate layer.   The method for producing an in-mold label container according to claim 5 or 6, wherein the body part label and the bottom part label are integrally formed.   The body part has a flange part at an upper end thereof, and the flange part has a flange part sheet provided at an upper end of the body part sheet and an injection resin. Manufacturing method of mold label container.

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