JP2017171380A - container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container capable of obtaining sufficient gas barrier property of a container body without arrangement of a gas barrier label on the whole surface of a label arrangement surface of the container body.SOLUTION: There is provided a container body 2 which has a bottom wall 3, a side wall 4 connected to the peripheral edge of the bottom wall 3 and a flange portion 21 connected to the upper part of the side wall 4, where the container body 2 has a label 5 and a molding resin portion 6, the lid material 7 has gas barrier property and is bonded to the flange portion 21, the label 5 has gas barrier property, is arranged outside or inside of the molding resin portion 6 and is arranged on the bottom wall 3 and the side wall 4 of the container body 2, a total label area ratio (S52/S2): ratio of an area S52 of a label to the total area S2 of an area S3 of the label arrangement surface of the bottom wall 3 and an area S4 of the label arrangement surface of the side wall 4 in the bottom wall 3 and the side wall 4 is 70% or more and 90% or less, and as for oxygen barrier property of the container body 2, a value of oxygen permeation according to JIS K-7126 is 1.0 cc/pkg day atm (23°C and 40%RH) or less.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a container having a gas barrier property and a container body.

  An in-mold label container is composed of a container body and a lid. The container body has, for example, a label having a heat seal layer set in advance on a mold at the time of injection molding, and the heat of the resin at the time of molding. It is obtained by fusing the heat seal layer of the label to the injection resin surface. Moreover, in order to obtain the gas barrier property of the whole container, a gas barrier label and a cover material are also used as the label and the cover material, respectively (for example, refer to Patent Documents 1 and 2).

  In an in-mold label container using a gas barrier label, if importance is attached to the gas barrier property, it is preferable to dispose the gas barrier label on the entire outer surface (label arrangement surface) of the bottom wall and side wall of the container body. However, in order to arrange the gas barrier label on the entire outer surface of the container body, it is necessary to eliminate the gap in the label in the state of the in-mold label container, but it is difficult to process the label without the gap. Moreover, although the accuracy of the label arrangement position is required, it is difficult to realize it.

On the other hand, if there is a gap in the label in the state of the in-mold label container, in other words, if the ratio of the label area to the area of the outer surface of the container body is small, the label processing accuracy and the label placement position accuracy will be reduced. Although the required level is lowered, the gas barrier property of the container body is insufficient.
Such a problem is that an in-mold label container in which the label is disposed on the inner surface (label arrangement surface) of the container body, or a container other than the in-mold label container, for example, an inner surface or an outer surface of a pre-molded molded resin portion (label The same can occur in a container in which a container body is formed by sticking a label on the arrangement surface) and the container body.

JP-A-2005-007653 JP 2007-076315 A

  An object of the present invention is to provide a container and a container body that can obtain a sufficient gas barrier property of the container main body even though no gas barrier label is arranged on the entire label arrangement surface of the container main body.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the above-mentioned problems can be solved by the following configuration, and have completed the present invention.

  (1) A container comprising a container main body having an opening and a lid material covering the opening, wherein the container main body has a bottom wall and a peripheral edge of the bottom wall in the height direction. A side wall to be continuously provided, and a flange portion to be continuously provided on an upper portion of the side wall, the container body is provided with a label and a molded resin portion in a thickness direction thereof, and the lid member has a gas barrier property, The label is bonded to the flange portion through a circumferential seal portion provided in the flange portion, and the label has a gas barrier property and is disposed outside or inside the molded resin portion, and the bottom of the container body. When the surface on which the label is arranged among the outer surface or the inner surface of the container main body, the bottom wall, and the side wall is all referred to as a label arrangement surface, the bottom wall and the side wall are arranged on the wall and the side wall. The bottom wall The total label area ratio, which is the ratio of the area of the label to the total area of the area of the label arrangement surface and the area of the label arrangement surface of the side wall, is 70% or more and 90% or less, and the oxygen barrier property of the container body Is a container whose oxygen permeability value according to JIS K-7126 is 1.0 cc / pg · day · atm (23 ° C., 40% RH) or less.

  (2) The container according to (1), wherein the oxygen barrier property of the container body has an oxygen permeability value of 0.1 cc / pg / day · atm (23 ° C., 40% RH) or more.

  (3) The container according to (1) or (2), wherein the label is not provided in a three-dimensional curved surface area of the label arrangement surface of the container body.

  (4) A container main body having an opening, wherein the container main body is connected from the bottom side in the height direction to a bottom wall, a side wall connected to the periphery of the bottom wall, and a top part of the side wall. The container body includes a label and a molded resin portion in the thickness direction thereof, the label has gas barrier properties, and is disposed outside or inside the molded resin portion, and The bottom surface and the side wall of the container main body are arranged on the bottom wall and the side wall, and among the outer surface or the inner surface of the container main body, the bottom wall and the side wall, the surface on which the label is disposed is referred to as the label arrangement surface. In the wall and the side wall, a total label area ratio, which is a ratio of an area of the label to a total area of the area of the label arrangement surface of the bottom wall and the area of the label arrangement surface of the side wall, is 70% or more and 90%. And said container Oxygen barrier properties of the body, the value of the oxygen permeability by JIS K-7126 is, 1.0cc / pkg · day · atm (23 ℃, 40% RH) or less, the container body.

  (5) The container body according to (4), wherein the oxygen barrier property of the container body has an oxygen permeability value of 0.1 cc / pg · day · atm (23 ° C., 40% RH) or more.

  (6) The container body according to (4) or (5), wherein the label is not provided in a three-dimensional curved surface area of the label arrangement surface of the container body.

  ADVANTAGE OF THE INVENTION According to this invention, although the gas barrier property label is not arrange | positioned on the whole label arrangement | positioning surface of a container main body, the container and container main body which can obtain sufficient gas barrier property of a container main body can be provided.

It is the perspective view which shows the container main body of the in-mold label container of 1st Embodiment of this invention, (A) is the figure seen from upper direction, (B) is the figure seen from the downward direction. It is a bottom view of the container main body of the in-mold label container of 1st Embodiment of this invention. It is a semi-sectional view which shows the side surface in alignment with the longitudinal direction of the in-mold label container of 1st Embodiment of this invention. It is a half sectional view showing the side along the transversal direction of the in-mold label container of a 1st embodiment of the present invention. It is a figure which shows the label of the in-mold label container of 1st Embodiment of this invention, (A) is a development view, (B) is the perspective view which extracted the label from the container main body virtually. It is a schematic diagram which shows the layer structure of the in-mold label container of 1st Embodiment of this invention. It is sectional drawing which shows the layer structure of a label. It is a schematic diagram which shows the manufacturing method of an in-mold label container. It is a schematic diagram which shows the layer structure of the container main body in the in-mold label container of 2nd Embodiment of this invention (corresponding figure of FIG. 6). It is a schematic diagram which shows the layer structure of the container main body in the in-mold label container of 3rd Embodiment of this invention (corresponding figure of FIG. 6). It is a graph which shows the measurement result of the oxygen concentration in a container.

[First Embodiment]
Hereinafter, the in-mold label container which is 1st Embodiment of the container of this invention with reference to drawings is demonstrated. FIG. 1 is a perspective view showing a container body of an in-mold label container according to a first embodiment of the present invention, where (A) is a view from above and (B) is a view from below. FIG. 2 is a bottom view of the container body of the in-mold label container according to the first embodiment of the present invention. FIG. 3 is a half sectional view showing a side surface along the longitudinal direction of the in-mold label container of the first embodiment of the present invention. FIG. 4 is a half sectional view showing a side surface along the short direction of the in-mold label container of the first embodiment of the present invention. FIG. 5 is a view showing the label of the in-mold label container according to the first embodiment of the present invention, in which (A) is a developed view and (B) is a perspective view in which the label is virtually extracted from the container body. FIG. 6 is a schematic diagram showing a layer structure of the in-mold label container according to the first embodiment of the present invention. FIG. 7 is a cross-sectional view showing the layer structure of the label.

  As shown in FIGS. 1-7, the in-mold label container 1 of this embodiment (1st Embodiment) is provided with the container main body 2 which has the opening part 22 in the upper part, and the cover material 7 which covers the opening part 22. FIG. . The container main body 2 has a box shape as a whole having an opening 22 at the top, and from the bottom side in the height direction thereof, the side wall 4 connected to the peripheral edge 31 of the bottom wall 3, and the side wall 4. The flange part 21 provided in a row with the upper part 41 is provided.

  The bottom wall 3 is a wall portion that forms the bottom portion of the container body 2. The bottom wall 3 has a square shape as a whole. The side wall 4 is formed in a peripheral wall shape from four planar walls 42, and the four planar walls 42 are connected to the peripheral edges 31 that are the respective sides of the rectangular bottom wall 3. The planar wall 42 of the side wall 4 has a square shape as a whole. The bottom wall 3 and the side wall 4 define a content storage portion in the container body 2 that stores the content. The flange portion 21 of the container body 2 has a substantially frame shape in plan view of the container body 2.

  The peripheral edge 31 of the bottom wall 3, that is, the boundary line between the bottom wall 3 and the side wall 4 is a line that demarcates a placement area when the container body 2 is placed on the placement surface. That is, the boundary line is a line connecting the outermost grounding points. Further, when the line connecting the outermost grounding points is partially interrupted, the boundary is formed by connecting the interrupted portions in a virtual and natural form. In the above definition, when the boundary line cannot be formed, the boundary line is defined by technical common sense.

  The outer surface and the inner surface of the region between the adjacent planar walls 42 and the periphery 31 of the bottom wall 3 form a three-dimensional curved surface region 25 having a three-dimensional curved surface. The three-dimensional curved surface region 25 is a concept that captures a part of the container body 2 from a different viewpoint from the bottom wall 3 and the side wall 4. The three-dimensional curved surface area 25 overlaps with the bottom wall 3 or the side wall 4. The regions other than the three-dimensional curved region 25 on the outer and inner surfaces of the bottom wall 3 and the side wall 4 are substantially planar planar regions or two-dimensional curved regions having a two-dimensional curved surface.

  The container body 2 may not include the three-dimensional curved surface area 25. The outer surface and the inner surface of the bottom wall 3 and the side wall 4 of the container main body 2 may be formed of only a planar region and / or a two-dimensional curved region.

  As shown in FIG. 6, the container body 2 includes a label 5 and a molded resin portion 6 in order from the outside in the thickness direction. FIG. 6 is schematically shown in order to show the layer structure of the label 5 and the molded resin portion 6. The thickness of the container body 2 is, for example, not less than 500 μm and not more than 1500 μm. In addition, in FIGS. 1-4, the external shape of the label 5 is shown with a dashed-two dotted line. The molded resin portion 6 exists on the entire inner surface of the container body 2. The inner surface of the molded resin portion 6 forms the inner surface of the container body 2. The label 5 has a gas barrier property, is disposed outside the molded resin portion 6, and is disposed on the bottom wall 3 and the side wall 4 of the container body 2. The flange portion 21 of the container body 2 is formed from the molded resin portion 6. A region where the label 5 is not disposed on the outer surface of the container body 2 is formed from the molded resin portion 6.

The lid member 7 has a gas barrier property and is bonded to the flange portion 21 via a circumferential seal portion (not shown) provided on the flange portion 21. In the present invention, the gas barrier property means having at least an oxygen barrier property, but may further have, for example, a water vapor barrier. The oxygen barrier property is a value of oxygen permeability measured according to JIS K-7126 (cc / m ² (or pkg) · day · atm, 23 ° C., 90% RH). For example, oxygen permeability manufactured by MOCON It can be measured with a rate measuring device OX-TRAN (Mocon method). Further, the water vapor barrier property is a value of water vapor permeability (g / m ² (or kg) · day · atm, 40 ° C., 90% RH) based on the measurement according to JIS K-7129 B method, for example, MOCON It can be measured with a water vapor permeability measuring device PERMATRAN manufactured by the company.

  The “circumferential seal portion” means a seal portion formed over one circumference, and may have various annular (circular, elliptical, etc.) contours, It may have a square outline.

  As shown in FIG. 5, the label 5 includes a bottom label portion 51 disposed on the bottom wall 3 and four side label portions 52 disposed on each of the four planar walls of the side wall 4. The bottom label portion 51 is rectangular in overall view, and the side label portion 52 is connected to each peripheral edge 511 that is each side of the bottom label portion 51. That is, the label 5 is composed of a single label in which a bottom label portion 51 and a side label portion 52 are continuously provided. 1, 2, and 5 </ b> A, a peripheral edge 511 of the bottom label portion 51, that is, a boundary line between the bottom label portion 51 and the side label portion 52 is indicated by a one-dot chain line.

  The label 5 is along the outer surface shape of the container body 2 as a whole. The side label portion 52 has a square shape as a whole, and more specifically, has a substantially trapezoid shape constricted on the bottom label portion 51 side. The four side label parts 52 are separated between the planar walls of the adjacent side walls 4. The bottom label portion 51 includes a gate hole 512 that is used when the molded resin portion 6 is injected at the center thereof. The thickness of the label 5 is, for example, 40 μm or more and 100 μm or less.

  The label 5 is composed of a laminate having a layer structure as shown in FIG. That is, as shown in FIG. 7, the label 5 includes at least (i) an adhesive layer (sealant layer) 53a with the molded resin portion 6, (ii) a printed layer 53b, (iii) a gas barrier layer 53c, iv) A laminate in which the synthetic resin layers 53d are sequentially laminated. The layer (i) and the layer (ii) can be used in combination. Each of these layers 53a, 53c and 53d 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-extrusion). It can also be formed. Moreover, a printing layer can also be abbreviate | omitted according to a use and the objective. Note that the print layer 53b is provided for the purpose of content display or imparting aesthetics, and examples of the print display include characters, numbers, figures, symbols, and the like.

  The adhesive layer 53a is not particularly limited as long as it adheres to the molded resin portion 6. Usually, the same plastic material as the molded resin portion 6, polyethylene containing EVA (ethylene / vinyl acetate copolymer), or the like is used. A resin having the following adhesive properties, or a plastic film on which these resins are coextruded or coated can be preferably used. Examples of the material of the adhesive layer 53a include polyethylene (PE) such as low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), and polypropylene (CPP, OPP, HS-OPP). The thickness of the adhesive layer 53a is, for example, 20 μm or more and 50 μm or less.

  As the gas barrier layer 53c, for example, (a) aluminum foil (7 to 25 μm), (b) an inorganic substance or an inorganic oxide laminated on a plastic film substrate by vapor deposition or the like, for example, a silicon oxide vapor deposited plastic film, an oxidation Aluminum vapor-deposited plastic film, aluminum vapor-deposited plastic film, (c) gas barrier resin such as polyacrylonitrile resin, EVOH (ethylene vinyl alcohol copolymer), PVDC (polyvinylidene chloride) film, PVDC-coated biaxially stretched plastic A film etc. are mentioned, It selects suitably according to desired performance. If the thickness of the gas barrier layer 53 is (b), it is 1 nm or more and 300 nm or less as an inorganic substance or an inorganic oxide, 5 μm or more and 50 μm or less as a plastic film substrate, and (c) a resin having gas barrier properties, It is 5 μm or more and 50 μm or less.

  As the synthetic resin layer 53d, a single-layer or multi-layer structure such as polyethylene terephthalate (PET), polypropylene (PP), and nylon (Ny) can be used. The thickness of the synthetic resin layer 53d is, for example, not less than 5 μm and not more than 50 μm. Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method, or other coating methods according to a conventional method.

Specifically, as the label 5, for example, a label having the following layer configuration can be used. Note that “/” is used as a notation indicating a boundary between layers when listing layers.
Biaxially stretched polypropylene (20 μm) / aluminum oxide thin film layer / biaxially stretched polyethylene terephthalate (12 μm) / heat-sealable stretched polypropylene (HS-OPP) (20 μm) (molded resin part 6 side)
Biaxially stretched polyethylene terephthalate (12 μm) / aluminum oxide thin film layer / biaxially stretched polyethylene terephthalate (12 μm) / heat-sealable stretched polypropylene (HS-OPP) (20 μm) (molded resin part 6 side)
Biaxially stretched polyethylene terephthalate (12 μm) / aluminum oxide thin film layer / heat-sealable stretched polypropylene (HS-OPP) (20 μm) (molded resin part 6 side)

The oxygen barrier property of Label 5 is preferably such that the value of oxygen permeability according to JIS K-7126 is 0.5 cc / m ² · day · atm (23 ° C., 90% RH) or less, 0.3 cc / More preferably, it is not more than m ² · day · atm. The water vapor barrier property is preferably 1 g / m ² · day · atm (40 ° C., 90% RH) or less, and 0.7 g / m ^{2 in} terms of water vapor permeability according to JIS K-7129 B method. More preferably, it is not more than day · atm.

  As the molded resin portion 6 of the container body 2, an injection-moldable thermoplastic resin, for example, polypropylene, polyethylene, polystyrene, or the like is used.

  The oxygen barrier property of the entire container body 2 having the oxygen barrier property label 5 is such that the value of oxygen permeability according to JIS K-7126 is 1.0 cc / pkg · day · atm (23 ° C., 40% RH) or less. Preferably, it is 0.7 cc / pg · day · atm (23 ° C., 40% RH) or less, and more preferably 0.5 cc / pg · day · atm (23 ° C., 40% RH) or less. It is particularly preferred. The oxygen barrier property of the entire container body 2 is, for example, an oxygen permeability value of 0.1 cc / pg / day · atm (23 ° C., 40% RH) or more.

  The water vapor barrier property is preferably such that the value of water vapor permeability according to the JIS K-7129 B method is 0.02 g / pg · day · atm (40 ° C., 90% RH) or less. For the water vapor barrier property, for example, the value of water vapor permeability is 0.01 g / pg · day · atm (40 ° C., 90% RH) or more. The container main body 2 in the present embodiment does not include a layer (such as various sheets or a sheet molded body) having high gas barrier properties other than the label 5.

  The lid member 7 is a laminate in which at least a base material layer, a gas barrier layer, and a sealant layer are laminated in order from the outer surface. As the base material layer, a single-layer or multi-layer structure such as polyethylene terephthalate (PET), polypropylene (OPP), and nylon (ONy) can be adopted. The thickness of the base material layer is, for example, 10 μm or more and 50 μm or less.

  As a gas barrier layer, the structure similar to the gas barrier layer 53c of said label 5 is mentioned.

  As the sealant layer, polyethylene (PE) such as low density polyethylene (LDPE) or linear low density polyethylene (LLDPE), polypropylene (CPP), or the like can be used. Further, by using a mixed resin in which one resin and another resin are incompatible (for example, PP and PE) or a polyolefin resin containing a rubber component such as polybutene, an easy peel property can be expressed. The thickness of the sealant layer is, for example, 20 μm or more and 100 μm or less. As other layers, a printing layer or the like may be provided.

The thickness of the lid member 7 is, for example, 30 μm or more and 150 μm or less. As the lid member 7, for example, the lid member 7 having the following layer configuration can be used.
Biaxially stretched polyethylene terephthalate (12 μm) / aluminum oxide thin film layer / biaxially stretched nylon (15 μm) / easy peelable unstretched polypropylene (50 μm) (container body 2 side)

The oxygen barrier property of the lid member 7 is preferably such that the value of oxygen permeability according to JIS K-7126 is 0.5 cc / m ² · day · atm (23 ° C., 90% RH) or less, 0.3 cc More preferably, it is not more than / m ² · day · atm. The water vapor barrier property is preferably 1 g / m ² · day · atm (40 ° C., 90% RH) or less, and 0.7 g / m ^{2 in} terms of water vapor permeability according to JIS K-7129 B method. -It is preferable that it is below day * atm.

  The inside of the in-mold label container 1 having such a configuration is filled with solid matter or liquid content (not shown). Next, the lid member 7 is bonded to the flange portion 21 of the in-mold label container 1, and the in-mold label container 1 is sealed.

  Next, the ratio of the area of the label 5 to the area of the outer surface of the container body 2 (the bottom wall 3 and the side wall 4) will be described. In the present invention, the label 5 is not arranged on the entire outer surface (label arrangement surface) of the bottom wall 3 and the side wall 4. In other words, the total label area ratio (S52 / R), which is the ratio of the area S52 of the label to the total area S2 of the area S3 of the outer surface (label arrangement surface) of the bottom wall 3 and the area S4 of the outer surface (label arrangement surface) of the side wall 4 S2) is less than 100%.

  Of the outer surfaces or inner surfaces of the container body 2, the bottom wall 3, and the side walls 4, the surface on which the label 5 is disposed is referred to as a “label arrangement surface”. The label arrangement surface in the first embodiment is an outer surface. The label arrangement surface in the second embodiment described later is an inner surface. The label arrangement surface means the whole area (including the region (area) where the label 5 does not exist) of the corresponding surface (outer surface, inner surface), for example, excludes the region (area) where the label 5 does not exist on the outer surface. is not.

  The bottom which is the ratio of the area S3 of the outer surface (label arrangement surface) of the bottom wall 3 to the total area S2 of the area S3 of the outer surface (label arrangement surface) of the bottom wall 3 and the area S4 of the outer surface (label arrangement surface) of the side wall 4 The wall area ratio (S3 / S2) is, for example, 10% or more, preferably 20% or more, and more preferably 30% or more.

  The upper limit of the total label area ratio (S52 / S2) is, for example, 95%, preferably 90%, and more preferably 85%. When the upper limit of the total label area ratio (S52 / S2) is too large, the required level of the processing accuracy of the container body 2 and the arrangement position accuracy of the label 5 increases.

  The lower limit of the total label area ratio (S52 / S2) is, for example, 70%, preferably 75%, and more preferably 80%. If the lower limit of the total label area ratio (S52 / S2) is too small, the gas barrier property of the container body 2 will be insufficient.

  In the bottom wall 3, the bottom wall label area ratio (S53 / S3), which is the ratio of the area S53 of the label 5 to the area S3 of the outer surface (label arrangement surface) of the bottom wall 3, is 50% or more and less than 100%. When the bottom wall label area ratio (S53 / S3) is in such a range, the balance between the gas barrier property of the container body 2 and the required level of processing accuracy of the container body 2 and the arrangement position accuracy of the label 5 is excellent. . The upper limit of the bottom wall label area ratio (S53 / S3) is, for example, 99%, preferably 95%, and more preferably 90%. The lower limit of the bottom wall label area ratio (S53 / S3) is, for example, 60%, and preferably 70%.

  In the side wall 4, the side wall label area ratio (S 54 / S 4), which is the ratio of the area S 54 of the label 5 to the area S 4 of the outer surface (label arrangement surface) of the side wall 4 (the total area of the outer surfaces of the four planar walls). 50% or more and less than 100%. When the side wall label area ratio (S54 / S4) is in such a range, the balance between the gas barrier property of the container body 2 and the required level of processing accuracy of the container body 2 and the arrangement position accuracy of the label 5 is excellent. The upper limit of the side wall label area ratio (S54 / S4) is, for example, 99%, preferably 95%, and more preferably 90%. The lower limit of the side wall label area ratio (S54 / S4) is, for example, 60%, and preferably 65%.

Next, with reference to FIG. 8, the manufacturing method of the in-mold label container 1 of this embodiment is demonstrated. FIGS. 8A and 8B are schematic views showing a method for manufacturing an in-mold label container.
First, the label 5 provided with the bottom part label part 51 and the side part label part 52 is prepared. Next, a mold M having a cavity M2 and a core M1 is prepared. Next, as shown in FIG. 8A, the label 5 is adsorbed in the cavity M2 of the mold M.

  Next, the core M1 is moved closer to the cavity M2, the core M1 is inserted into the cavity M2, and the cavity M2 and the core M1 are clamped.

  In this state, as shown in FIG. 8 (B), the resin forming the molded resin portion 6 is injected into the space between the cavity M2 and the core M1 from the injection resin injection port M2a provided in the cavity M2. To do. Thereby, the molded resin portion 6 formed of the resin injected from the injection port M2a enters between the core M1 and the label 5 through the gate hole 512 provided in the label 5, and the molded resin portion 6 and the label 5 Are glued together. In this way, the container body 2 having the label 5 disposed on the outer surface is obtained. The container body 2 of the obtained in-mold label container 1 is taken out from the mold M outward.

  Next, the contents (not shown) are accommodated inside the container body 2 in an inert gas atmosphere such as nitrogen, carbon dioxide, or a rare gas. Thereafter, the lid member 7 is adhered to the flange portion 21 of the container body 2, and the in-mold label container 1 is sealed (see FIGS. 3 and 4).

  According to the in-mold label container 1 of this embodiment, the following effects are produced, for example. The in-mold label container 1 of the present embodiment is a container 1 that includes a container body 2 having an opening 22 and a lid member 7 that covers the opening 22, and the container body 2 is bottom in the height direction. From the bottom wall 3, the side wall 4 connected to the peripheral edge 31 of the bottom wall 3, and the flange portion 21 connected to the upper portion 41 of the side wall 4, the container body 2 has a label 5 in the thickness direction. And a molded resin portion 6. The lid member 7 has a gas barrier property and is bonded to the flange portion 21 via a circumferential seal portion provided on the flange portion 21, and the label 5 has a gas barrier property and is outside or inside the molded resin portion 6. And disposed on the bottom wall 3 and the side wall 4 of the container body 2. In the bottom wall 3 and the side wall 4, the total label area ratio (S52 / S2) which is the ratio of the area S52 of the label to the total area S2 of the area S3 of the label arrangement surface of the bottom wall 3 and the area S4 of the label arrangement surface of the side wall 4 ) Is 70% or more and 90% or less, and the oxygen barrier property of the container main body 2 is 1.0 cc / pg · day · atm (23 ° C., 40% RH) according to JIS K-7126. It is as follows.

  Therefore, according to the in-mold label container 1 of this embodiment, the gas barrier property of the container body 2 is sufficient even though the gas barrier label 5 is not disposed on the entire outer surface (label placement surface) of the container body 2. Is obtained. Moreover, since the tolerance of the arrangement position of the label 5 can be made, the productivity is excellent.

  In the present embodiment, the label 5 is not provided in the three-dimensional curved surface region 25 on the outer surface (label arrangement surface) of the container body 2. Therefore, no wrinkles are formed on the label 5, and the label 5 is arranged smoothly on the outer surface of the container body 2, and the container body 2 is excellent in aesthetic appearance.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 9 is a schematic view showing the layer structure of the container body in the in-mold label container according to the second embodiment of the present invention (corresponding to FIG. 6). In the second embodiment, differences from the first embodiment will be mainly described. Therefore, detailed description of the same (or equivalent) configuration as in the first embodiment is omitted. The description of the first embodiment is appropriately applied to points that are not particularly described in the second embodiment.

  Compared with the in-mold label container 1 of the first embodiment, the in-mold label container 1A of the second embodiment mainly has a point that the position (label arrangement surface) where the label 5 is arranged in the container body 2 is the inner surface. Different. Therefore, the descriptions of “inner surface (inner side)” and “outer surface (outer side)” regarding the label arrangement surface in the first embodiment are respectively “outer surface (outer side)” and “inner surface (inner side) in the label arrangement surface in the second embodiment. ) "Is used in the replaced form. Other configurations are the same as those of the first embodiment.

  In the in-mold label container 1 of the first embodiment shown in FIG. 6 and the like, the container body 2 includes a label 5 and a molded resin portion 6 in order from the outside in the thickness direction. The molded resin portion 6 exists on the entire inner surface of the container body 2. The label 5 is disposed outside the molded resin portion 6. In the bottom wall 3, the bottom wall label area ratio (S53 / S3), which is the ratio of the area S53 of the label 5 to the area S3 of the outer surface (label arrangement surface) of the bottom wall 3, is 50% or more and less than 100%. In the side wall 4, the side wall label area ratio (S54 / S4), which is the ratio of the area S54 of the label 5 to the area S4 of the outer surface (label arrangement surface) of the side wall 4, is 50% or more and less than 100%.

  In contrast, in the in-mold label container 1 </ b> A of the second embodiment shown in FIG. 9, the container body 2 includes a label 5 and a molded resin portion 6 in order from the inside in the thickness direction. The molded resin portion 6 exists on the entire outer surface of the container body 2. The label 5 is disposed inside the molded resin portion 6. In the bottom wall 3, the bottom wall label area ratio (S53 / S3), which is the ratio of the area S53 of the label 5 to the area S3 of the inner surface (label arrangement surface) of the bottom wall 3, is 50% or more and less than 100%. In the side wall 4, the side wall label area ratio (S54 / S4), which is the ratio of the area S54 of the label 5 to the area S4 of the inner surface (label arrangement surface) of the side wall 4, is 50% or more and less than 100%.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 10 is a schematic diagram showing the layer structure of the container body in the in-mold label container of the third embodiment of the present invention (corresponding to FIG. 6). In the third embodiment, differences from the first embodiment will be mainly described. Therefore, detailed description of the same (or equivalent) configuration as in the first embodiment is omitted. In addition, the description of the first embodiment is appropriately applied to points that are not particularly described in the third embodiment.

  In the in-mold label container 10B of the third embodiment, the container body 2 includes, in order from the outside in the thickness direction, a label 5 having a gas barrier property, a molded resin portion 6, and a sheet molded body 8 having a gas barrier property. I have. Since the label 5 and the molded resin portion 6 are the same as those in the first embodiment, description thereof is omitted.

  The sheet molded body 8 is located inside the molded resin portion 6, and includes a bottom sheet 81 corresponding to the bottom wall 3 of the container body 2, a side sheet 82 corresponding to the side wall 4 of the container body 2, and the container body 2. It has a container shape (a shape along the container body 2) including a flange portion sheet 83 corresponding to the flange portion 21. The sheet molded body 8 has a gas barrier property as a whole.

  The laminate constituting the sheet molded body 8 includes, for example, a polypropylene layer (PP) as a synthetic resin layer disposed in order from the outside of the container body 2 and an ethylene vinyl alcohol copolymer layer as a gas barrier layer having gas barrier properties. (EVOH) and a polypropylene layer (PP) as an adhesive layer. By performing vacuum forming on the sheet-shaped laminate thus configured, a sheet molded body 8 having a container shape can be obtained.

  In the third embodiment, the sheet molded body 8 is positioned inside the molded resin portion 6 and the label 5 is positioned outside the molded resin portion 6, but is not limited thereto. The sheet molded body 8 may be disposed outside the molded resin portion 6, and the label 5 may be disposed inside the molded resin portion 6.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms. For example, although the said embodiment is an in-mold label container, this invention is not restrict | limited to this. The container main body of the container of the present invention can be formed, for example, by attaching a label to the inner surface or the outer surface of a molded resin portion that has been molded in advance. The side wall 4 of the container body 2 may be entirely curved (for example, cylindrical or frustoconical). The label 5 can also be disposed on the flange portion 21 of the container body 2. The present invention can be regarded as an invention related to a container including a container main body having an opening and a lid covering the opening, and can also be understood as an invention related to a container main body.

  The present invention will be specifically described below with reference to examples and comparative examples. However, the present invention is not limited to the examples.

〔Example〕
<Label>
From the outside, biaxially stretched polypropylene (thickness 20 μm), aluminum oxide vapor deposition layer (10 nm), biaxially stretched polyethylene terephthalate (thickness 12 μm), heat-sealable stretched polypropylene (HS-OPP) (thickness 20 μm) (molded resin part side) ) Were sequentially laminated.
<Cover material>
From the outside, biaxially stretched polyethylene terephthalate (thickness 12 μm), aluminum oxide vapor deposition layer (10 nm), biaxially stretched nylon (thickness 15 μm), easy peel non-stretched nylon (thickness 50 μm) (container body side) are laminated in order. A lid was prepared.

Example 1
First, a container body having a label on the outer surface was manufactured by setting the label in a mold so that the heat-sealable stretched polypropylene was on the inside, and injection-molding the polypropylene. Next, the in-mold label container of the first embodiment shown in FIGS. 1 to 6 is manufactured by forming a circumferential seal part by welding a lid material to the flange part of the container body in a nitrogen gas atmosphere. (Container capacity: 150 cc, area of outer surface of container body in container: 158 cm ² , area of opening of container body: 60.7 cm ² ). At this time, the label covered 75.0% of the area of the outer surface of the bottom wall of the container main body and 88.6% of the area of the outer surface of the side wall of the container main body. In addition, the oxygen concentration in the content container was set to 0.2%. A method for measuring the oxygen concentration will be described later.

(Example 2)
The label covered 75.0% of the outer surface area of the bottom wall of the container body and 68.3% of the outer surface area of the side wall of the container body. Except for these, an in-mold label container was produced in the same manner as in Example 1. In addition, the oxygen concentration in the content container was set to 0.2%.

(Comparative Example 1)
The label covered 75.0% of the outer surface area of the bottom wall of the container body and 27.6% of the outer surface area of the side wall of the container body. Except for these, an in-mold label container was produced in the same manner as in Example 1. In addition, the oxygen concentration in the content container was set to 0.2%.

(Comparative Example 2)
No label is provided on the container body. That is, the label did not cover the outer surface of the bottom wall and the outer surface of the side wall of the container body. Except for these, an in-mold label container was produced in the same manner as in Example 1. In addition, the oxygen concentration in the content container was set to 0.2%.

<Measurement method of oxygen permeability>
The oxygen permeability (oxygen barrier property, unit cc / pkg · atm · day) of the container body of each Example or each Comparative Example was measured by the Mocon method according to the following.
(I) The opening part of the in-mold label container manufactured in each Example or each Comparative Example is sealed with an acrylic plate having a thickness of 10 mm with two tubes having a diameter of 1 mm.
(Ii) One tube attached to the acrylic plate is connected to the measuring instrument, and nitrogen gas is introduced from the other tube.
(Iii) Nitrogen gas introduced into the container is introduced into the measuring machine through another tube, and the amount of oxygen entering through the side wall of the container is measured. The measurement is performed in an atmosphere at a temperature of 23 ° C. and 40% RH.

  [Table 1] shows the oxygen permeability of the container body of each example and each comparative example. According to the measurement results shown in Table 1, when the overall label area ratio is 70% or more, the oxygen permeability is 1/3 or less compared to the case where the overall label area ratio is 0% (no label), and high oxygen. It can be seen that barrier properties can be obtained.

<Measurement method of oxygen concentration>
The method for measuring the oxygen concentration in the container after gas replacement is as follows.
Measuring instrument used: Check Point II (manufactured by Dansensor)
Specific measurement method:
(1) The gas in the in-mold label container is replaced with 100% concentration nitrogen gas, and the lid is heat sealed on the container body and sealed. The oxygen barrier property of the lid member is 0.16 cc / m ² · day · atm, and the area of the lid member facing the opening of the container body is 60.7 cm ² . Use one container for each measurement (use a new container each time).
(2) The temperature outside the container at the time of measurement shall be 23-25 degreeC. The humidity outside the container at the time of measurement is 40% RH.
(3) The oxygen concentration (residual oxygen concentration) in the container immediately after nitrogen gas replacement was measured with a measuring instrument.
(4) Measurement was performed every time (1 day, 3 days, 5 days, 7 days, 10 days, 15 days, and 20 days later).

  The oxygen concentration in the container of each Example and each Comparative Example was measured by the oxygen concentration measurement method. The result is shown in FIG. As shown in FIG. 11, for example, according to Examples 1 and 2, it is recognized that the oxygen concentration in the container can be maintained at 2.0% or less even after 14 days. Further, according to Example 1, it is recognized that the oxygen concentration in the container can be maintained at 2.0% or less even after 20 days.

In summary, in the present invention, the method for measuring the oxygen concentration in the container after gas replacement is as follows.
(1) The gas in the container is replaced with 100% concentration nitrogen gas, and the lid is heat sealed on the container body and sealed. The oxygen barrier property of the lid member is 0.16 cc / m ² · day · atm, and the area of the lid member facing the opening of the container body is 60.7 cm ² .
(2) The temperature outside the container at the time of measurement shall be 23-25 degreeC. The humidity outside the container at the time of measurement is 40% RH.
(3) The oxygen concentration (residual oxygen concentration) in the container immediately after nitrogen gas replacement is measured.
(4) Perform measurement every time.
(5) The oxygen concentration in the container is maintained at 2.0% or less even after 14 days.

1 In-mold label container (container)
2 Container body 21 Flange part 22 Opening part 25 Three-dimensional curved surface area 3 Bottom wall 31 Perimeter 4 Side wall 41 Top 5 Label 51 Bottom label part 511 Peripheral 512 Gate hole 52 Side label part 6 Molded resin part 7 Lid

Claims (6)

A container comprising a container body having an opening and a lid covering the opening,
The container body includes, from the bottom side in the height direction, a bottom wall, a side wall continuous to the periphery of the bottom wall, and a flange portion continuous to the top of the side wall,
The container body includes a label and a molded resin portion in the thickness direction thereof.
The lid member has a gas barrier property and is bonded to the flange portion via a circumferential seal portion provided in the flange portion,
The label has a gas barrier property, is disposed outside or inside the molded resin portion, and is disposed on the bottom wall and the side wall of the container body,
When all the surfaces on the side where the label is arranged among the outer surface or the inner surface of the container main body, the bottom wall and the side wall are referred to as label arrangement surfaces,
In the bottom wall and the side wall, a total label area ratio, which is a ratio of an area of the label to a total area of an area of the label arrangement surface of the bottom wall and an area of the label arrangement surface of the side wall, is 70% or more 90% or less,
The oxygen barrier property of the container body is a container whose oxygen permeability value according to JIS K-7126 is 1.0 cc / pg · day · atm (23 ° C., 40% RH) or less.   2. The container according to claim 1, wherein the oxygen barrier property of the container body has an oxygen permeability value of 0.1 cc / pg · day · atm (23 ° C., 40% RH) or more.   The container according to claim 1 or 2, wherein the label is not provided in a three-dimensional curved surface area of the label arrangement surface of the container body. A container body having an opening,
The container body includes, from the bottom side in the height direction, a bottom wall, a side wall continuous to the periphery of the bottom wall, and a flange portion continuous to the top of the side wall,
The container body includes a label and a molded resin portion in the thickness direction thereof.
The label has a gas barrier property, is disposed outside or inside the molded resin portion, and is disposed on the bottom wall and the side wall of the container body,
When all the surfaces on the side where the label is arranged among the outer surface or the inner surface of the container main body, the bottom wall and the side wall are referred to as label arrangement surfaces,
In the bottom wall and the side wall, a total label area ratio, which is a ratio of an area of the label to a total area of an area of the label arrangement surface of the bottom wall and an area of the label arrangement surface of the side wall, is 70% or more 90% or less,
The oxygen barrier property of the said container main body is a container main body whose value of the oxygen permeability by JISK-7126 is 1.0 cc / pg / day * atm (23 degreeC, 40% RH) or less.   The container main body according to claim 4, wherein the oxygen barrier property of the container main body has an oxygen permeability value of 0.1 cc / pg · day · atm (23 ° C., 40% RH) or more.   The container body according to claim 4 or 5, wherein the label is not provided in a three-dimensional curved surface area of the label arrangement surface of the container body.

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