WO2015072404A1 - Container body, container, and method for producing container - Google Patents

Abstract

The present invention involves: attaching a lid body (3) to a flange section (25) in which the skirt section (26) of a container body (2) is provided, via a ring-shaped first heat-sealing part (23); attaching the lid body (3) to at least part of the outer-peripheral edge of a flat end section (27) extending from the skirt section (26), via a second heat-sealing part (29); starting interlayer detachment from the flat end section (27), as a result of unsealing from an unsealing start section (3A) constituting part of the lid body (3) and corresponding to the flat end section (27); and unsealing as a result of interlayer detachment from the second heat-sealing part (29) along the first heat-sealing part (23) up to the notch (28). The skirt section (26) is provided for the purposes of appearance, strength, user-friendliness, and the like; however, interlayer detachment is possible even in a configuration provided with one notch (28). Precision on the outer-peripheral side of the first heat-sealing part (23) is unnecessary, and it is easy to attach the lid body (3).

Description

Container body, container and container manufacturing method

The present invention relates to a container body having a cut groove in the flange portion of the container body, a container, and a method for manufacturing the container.

Conventionally, for example, as a container for foods, the top film is heat-sealed and firmly sealed to the flange portion of the container body made of a multilayer sheet, and when opened, it can be easily removed by delamination of other layer sheets constituting the container body The structure which can be opened is known (for example, refer patent document 1).
In this container, the adhesive force between the flange and the top film is made larger than the interlayer adhesive force between the inner and outer layers in the multilayer sheet constituting the container body. Furthermore, the cut groove is provided in the opening part side of the container main body from the position where the top film in the flange part is heat-sealed. When opening the top film, the inner layer of the container body is peeled from the outer layer to the position of the cut groove together with the top film, thereby opening the container.

As described in Patent Document 1, in consideration of appearance, handling, strength of the container body, and the like, the peripheral edge of the flange portion is bent downward as such a container, and a double cut A configuration in which a top film is heat-sealed between grooves is known.

Japanese Patent Laid-Open No. 62-251363

However, for example, in the case of a food container, the interval between the double cut grooves is about several millimeters, and in order to heat-seal the top film without overlapping the cut grooves in the meantime, positioning with high accuracy is required. It is necessary to fuse. For this reason, there are inconveniences such as the need for a manufacturing apparatus capable of heat fusion with high accuracy, and a simpler manufacturing method is desired.
An object of this invention is to provide the manufacturing method of a container main body, a container, and a container with easy attachment of a cover body.

The container main body of the present invention includes a storage recess having an opening for storing an object to be packaged, a flat portion formed by extending from the outer peripheral edge of the opening, and a bottom of the container main body from the outer peripheral edge of the flat portion. A container body having a multi-layer structure including a flange portion having a skirt portion bent toward a direction, and the opening portion being closed by attaching a lid to the flange portion, A flat end portion extending outward from the outer peripheral edge of the skirt portion, and an annular portion located on the opening side from an attachment region to which the lid body is attached in the flange portion. A cutting groove that cuts at least one layer facing the surface to which the lid is attached, and the attachment region includes a first attachment region that is annularly provided in the flange portion, and the flange. And having a second attachment region provided over at least a portion of the outer peripheral edge of Tsu preparative end.
The skirt portion of the container main body of the present invention is formed by bending from the outer peripheral edge of the flat portion toward the bottom surface of the container main body. Here, the angle for forming the bend is not particularly limited as long as it is bent in the direction of the bottom surface of the container. In addition, the flat portion means that the flat portion is substantially flat with respect to the facing surface of the lid member attached to the container body of the present invention, and tilting in a range that does not hinder the attachment of the lid member is allowed. It shall be. By forming the skirt portion of the container body of the present invention to be bent, the flange portion can be prevented from warping after filling the contents even when the container is filled with an object whose volume is reduced when the temperature is lowered. .

In the present invention, the lid body is attached to the flange portion provided with the skirt portion of the container body in the annular first attachment region, and the flat end portion extending from the skirt portion extends over at least a part of the outer peripheral edge. By attaching the lid in the attachment area of 2, the delamination starts from the flat edge when opening from the flat edge, and the delamination starts from the second attachment area to the cut groove over the first attachment area. Opened. For this reason, delamination can be obtained even with a container body provided with a skirt portion for the purpose of appearance, strength, handleability, and the like, in which one cut groove is provided on the opening side from the attachment region. Therefore, it is not necessary to provide another cut groove on the outer peripheral side of the attachment region. Therefore, by extending the outer peripheral side of the mounting area to the outer peripheral edge of the flange portion, the mounting strength in the mounting area can be improved and sealing can be performed with high strength. The work of adjusting the precision at the time of manufacturing accompanying the formation of the film is reduced.
Here, in the present invention, the term “bend” includes a state in which it is bent and is bent at an angle with a broken line, or a state in which it is bent so as to be bent without a broken line. In the present invention, the term “annular” includes a round shape and a polygonal shape having a plurality of corners.

And in this invention, it is preferable that the said flat edge part is set as the structure extended and extended toward the outer periphery of the said skirt part.
In the present invention, the flat end portion and the flange portion face the same upper surface to which the lid is attached, so that the lid can be attached in one operation from above, and the manufacturing efficiency can be improved.

In the present invention, when the flat end portion has an angle formed with respect to the opening surface of the opening portion of less than 60 °, more specifically when the position of the opening surface is 0 °, the flat end portion is upward. It is preferable that the angle formed by the extension is + 60 ° to the angle −60 ° formed by the flat end extending downward.
In the present invention, when the angle formed by the flat end with respect to the opening surface of the opening is + 60 ° or more, it is difficult to open, and when it is −60 ° or more, sealing may be difficult.

In the present invention, it is preferable that the skirt portion is formed so as to extend from the periphery of the flat portion.
In this invention, even if the first attachment region where the lid is attached to the flange portion and the second attachment region attached at the flat end portion are spaced apart and the region where the lid is not attached is interposed, It is possible to prevent the appearance from being damaged due to a gap between the lid and the skirt portion.

Furthermore, in this invention, it is preferable to set it as the structure by which the said 2nd attachment area | region and said 1st attachment area | region are formed continuously.
In this invention, since the delamination starting from the flat end portion at the time of opening proceeds continuously from the region attached to the skirt portion to the first attachment region with the flange portion, delamination can proceed smoothly and smooth A feeling of opening can be provided. In particular, in the configuration in which the skirt portion is formed to be inclined and extend from the periphery of the flat portion, the attachment with the skirt portion is facilitated, and a configuration in which a smooth opening feeling can be obtained can be easily manufactured.

The container body of the present invention has a recess, a first flat portion formed extending from an edge of the opening of the recess, and an outer peripheral edge of the first flat portion toward the bottom side of the recess. A container body having a laminated structure in which at least a part of the opening is closed by attaching a lid to the first flange portion, the flange portion having a skirt portion formed by bending. A second flat portion extending outward from the outer peripheral edge of the skirt portion with respect to the recess, and an annular first attachment region to which the lid of the first flange portion is attached. An annular groove located on the edge side of the opening, and a groove that cuts at least one layer facing the surface to which the lid is attached in the flange portion, and an outer peripheral edge of the second flat portion Over at least a portion, wherein the second mounting area in which the lid is attached is provided.
The skirt portion of the container main body of the present invention is bent and formed from the outer peripheral edge of the first flat portion toward the bottom surface side of the recess. Here, the angle for forming the bend is not particularly limited as long as it is bent in the direction of the bottom surface of the recess. In addition, the first flat portion means that the first flat portion is substantially flat with respect to the facing surface of the lid attached to the container body of the present invention, and the inclination is within a range that does not hinder the attachment of the lid. It shall be allowed. By forming the skirt portion of the container body of the present invention to be bent, the flange portion can be prevented from warping after filling the contents even when the container is filled with an object whose volume is reduced when the temperature is lowered. .

In the present invention, a lid is attached to the flange portion provided with the skirt portion of the container body in the annular first attachment region, and at least a part of the outer peripheral edge extends to the second flat portion extending from the skirt portion. When the lid is attached in the second attachment region, delamination starts from the second flat portion when opening from the second flat portion, and delamination extends from the second attachment region to the groove over the first attachment region. And then opened.
For this reason, delamination can be obtained even with a container body provided with a skirt portion for the purpose of appearance, strength, handleability, etc., with one groove provided on the opening side of the recess from the attachment region. Therefore, it is not necessary to provide another groove on the outer peripheral side of the attachment region. Therefore, it is possible to improve the mounting strength in the mounting area by expanding the outer peripheral side of the mounting area to the outer peripheral edge of the flange part, and at the same time can be sealed with high strength, and at the same time, by eliminating one groove, accompanying the formation of the groove The precision adjustment work during manufacturing is reduced.

The container of the present invention comprises the container main body of the present invention and a lid attached to the flange portion of the container main body to close the opening, and the container main body has an adhesive force between the flange portion and the lid. It is characterized in that at least one interlayer adhesive force of the laminated structure constituting the container body is formed small.
In the present invention, the container body of the present invention that can be delaminated is used even with a configuration having a skirt portion and a single groove, so that the mounting strength in the mounting region can be improved, and at the same time high-strength sealing can be achieved. , One groove can be eliminated, and the accuracy adjustment work during manufacturing associated with the groove formation can be reduced.

The container manufacturing method of the present invention includes a storage recess having an opening for storing an object to be packaged, a flat portion formed extending from the outer periphery of the opening, and a container body from the outer periphery of the flat portion. A method for manufacturing a container in which a lid is attached to the flange portion and the opening portion is closed on a container body having a multi-layer structure including a flange portion having a skirt portion that is bent toward the bottom portion. The container main body is provided in an annular shape so as to be positioned closer to the opening side than a flat end portion extending outward from an outer peripheral edge of the skirt portion and an attachment region to which the lid body is attached in the flange portion. And a flange having a notch groove for cutting at least one surface of the flange portion facing the surface to which the lid body is attached, the lid body, the flange portion and the lid. In the state where at least one interlayer adhesive force of the multilayer structure constituting the container body is smaller than the adhesive force with the annular attachment in the attachment region, and over the at least part of the outer peripheral edge of the flat end portion A lid is attached to the flat end.

In the present invention, a container body having a flat end portion extended to a skirt portion provided in the flange portion is used, and the lid body is attached to the flange portion with an annular attachment region, and at least a part of the outer peripheral edge of the flat end portion. Since the lid is attached to the opening start portion, delamination starts from the flat end when opening from the flat end portion, and the delamination starts from the flat end to the cut groove. For this reason, delamination can be obtained even with a container body provided with a skirt portion for the purpose of appearance, strength, handleability, and the like, in which one cut groove is provided on the opening side from the attachment region. Therefore, it is not necessary to provide another cut groove on the outer peripheral side of the attachment region. Therefore, it is possible to improve the mounting strength in the mounting area by expanding the outer peripheral side of the mounting area to the outer peripheral edge of the flange portion, and at the same time can be sealed with high strength, and at the same time eliminating one cutting groove, The work of adjusting the precision at the time of manufacturing accompanying the formation of the film is reduced.

And in this invention, it comprises the container main body of this invention, and the cover body which is attached to the flange part of the said container main body, and obstruct | occludes the said opening part, A said 1st attachment area | region is at least of outer periphery It is preferable that a position corresponding to the flat end portion is formed by an annular seal bar formed in a curved shape.
In this invention, as an annular seal bar for attaching the lid, a position corresponding to at least the flat end portion of the outer peripheral edge is formed in a curved surface, so that a resin reservoir is formed on the outer peripheral edge of the first attachment region. Is prevented, and the unsealing by the resin reservoir is prevented from being impaired when the lid is unsealed, and a smooth unsealing property can be obtained.

In the present invention, it is preferable that the first attachment region is formed by a curved surface around the outer periphery of the seal bar.

The container main body of the present invention includes a storage recess having an opening for storing an object to be packaged, a flat portion formed by extending from the outer peripheral edge of the opening, and a bottom of the container main body from the outer peripheral edge of the flat portion. A container body having a multi-layer structure including a flange portion having a skirt portion bent toward a direction, and the opening portion being closed by attaching a lid to the flange portion, At least a part of the outer peripheral edge of the flat portion of the flange portion is not formed by bending the skirt portion, and the annular portion is located closer to the opening than the annular attachment region to which the lid body is attached in the flange portion. A cut groove that cuts at least one layer facing the surface to which the lid body is attached in the flange portion, and the skirt portion is bent and formed. And without an outer peripheral edge of the flat portion and the outer peripheral edge of the annular attachment region, characterized in that match.

In this invention, at least a part of the outer peripheral edge where the skirt part in the flat part is not bent is formed as a flat end part, and the outer peripheral edge of the annular attachment region to which the lid body is attached in the flange part is used as the flat part in the flat end part. Therefore, when opening from the flat end, delamination starts from the flat end, and delamination is performed up to the cut groove over the first attachment region. From this, delamination can be obtained even in a container body provided with a skirt portion for the purpose of appearance, strength, handling, etc., and having one cut groove on the opening side from the attachment region. For this reason, it is not necessary to provide another cut groove on the outer peripheral side of the attachment region. Therefore, it is possible to improve the mounting strength in the mounting area by expanding the outer peripheral side of the mounting area to the outer peripheral edge of the flange portion, and at the same time can be sealed with high strength, and at the same time eliminating one cutting groove, The work of adjusting the precision at the time of manufacturing accompanying the formation of the film is reduced.

The container body of the present invention includes a concave portion, a flat portion formed extending from an edge of the opening of the concave portion, and a skirt portion formed by bending from the outer peripheral edge of the flat portion toward the bottom side of the concave portion. A container body having a laminated structure in which at least a part of the opening is closed by attaching a lid to the flange part, wherein the flange part is at least an outer peripheral edge of the flat part. A part of the skirt portion is not bent and is provided in an annular position on the opening side of an annular attachment region to which the lid of the flange portion is attached, and at least the lid of the flange portion is attached. A groove for cutting one layer facing the surface, and an outer peripheral edge of the flat portion where the skirt portion is not bent and the annular mounting region At least a portion of the outer periphery of which is characterized in that match.

In this invention, at least a part of the outer peripheral edge where the skirt portion in the flat portion is not bent is formed as a flat end portion, and the outer peripheral edge of the annular mounting region to which the lid in the flange portion is attached is defined as the flat portion at the flat end portion. Since it coincides with the outer peripheral edge, delamination starts from the flat end when opening from the flat end, and delamination up to the groove is performed across the first attachment region. Therefore, delamination can be obtained even with a container body provided with a skirt portion for the purpose of appearance, strength, handling, etc. and having one groove on the opening side from the attachment region. For this reason, it is not necessary to provide another groove on the outer peripheral side of the attachment region. Therefore, it is possible to improve the mounting strength in the mounting region by expanding the outer peripheral side of the mounting region to the outer peripheral edge of the flange portion, and to seal with high strength, and at the same time, by eliminating one groove, accompanying the formation of the groove The precision adjustment work during manufacturing is reduced.

The perspective view which opened a part which shows the easily openable container of 1st embodiment which concerns on the container of this invention. The top view which shows the said easily openable container. The side view which shows the said easily openable container. FIG. 3 is a side sectional view taken along the line II in FIG. 2 showing a part of the easy-open container. Side surface sectional drawing of the position of II-II in FIG. 2 which shows a part of said easily openable container. Explanatory drawing explaining the sealing operation | movement of the said easily openable container. The perspective view which opened a part which shows the easily openable container of 2nd embodiment which concerns on the container of this invention. Side surface sectional drawing of the position of the flat edge part which shows a part of said easily openable container. Side surface sectional drawing of the position of the skirt part which shows a part of said easily openable container. The perspective view which opened a part which shows the easily openable container in other embodiment of this invention. Side surface sectional drawing in the flat edge part of the easily openable container in other embodiment of this invention. Side surface sectional drawing in the skirt part in the easily openable container of the said further another embodiment. The top view which shows the easily openable container in other embodiment of this invention. The perspective view which opened a part which shows the easily openable container in other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, a circular container is illustrated, but the present invention is not limited to this.

{First embodiment}
[Configuration of easy-open container]
1 to 3 show an easily openable container 1 which is a container according to the present invention, and this easily openable container 1 includes a container body 2 and a lid 3 which is a lid. The container body 2 is formed by molding a multilayer sheet, specifically, by heating, and is a laminate in which two layers of a release layer 21 and a front lower layer 22 are laminated in this order (see FIG. 4). .
Here, the peeling layer 21 is a layer that comes into contact with an object to be packaged enclosed in the easy-open container 1 and is heat-sealed with the sealant of the lid 3. Although the details will be described later, the first heat seal portion 23 as the first attachment region, which is a portion heat-sealed with the lid 3, is peeled from the container body 2 together with the lid 3.
As the peeling layer 21, for example, a material heat-sealed with the lid 3, preferably a polyolefin resin is suitably used. Specifically, polypropylene resins such as homopolypropylene (HPP), random polypropylene (RPP) and block polypropylene, polyethylene resins such as high density polyethylene (HDPE) and low density polyethylene (LDPE), linear ethylene- An α-olefin copolymer or the like is used.

The front lower layer 22 constitutes a lower layer of the release layer 21 adjacent to the release layer 21, and is delaminated with the release layer 21 when the easy-open container 1 is opened.
As a specific material constituting the upper and lower layer 22, for example, it is preferable that the material is composed of at least one selected from the group of olefin resin, polystyrene resin, and polyester resin.
As the olefin resin, specifically, polypropylene, polyethylene, and the like are used. In particular, polypropylene is preferably used because it is widely distributed and easily available, is inexpensive, and has high strength.
Specific examples of the polystyrene-based resin include general-purpose transparent and rigid GP grade polystyrene and impact-resistant HI grade polystyrene, and particularly required when HI grade polystyrene is used as a container. It is preferably used from the viewpoint of impact resistance.
As the polyester resin, specifically, amorphous polyester, crystalline polyester, or the like is used, and amorphous polyester is particularly preferably used for reasons of processability.

In particular, as the surface lower layer 22, a polymer containing at least a part of a propylene unit (hereinafter referred to as a polypropylene resin, and appropriately referred to as PP) and a polymer containing an ethylene unit at least in a part (hereinafter referred to as a polyethylene resin) It is preferable to use a resin composition in which PP: PE = 30% by mass or more and 99% by mass or less: 1% by mass or more and 70% by mass or less.
Here, if the mass ratio PP / PE is smaller than 0.67, there is a possibility that a resin pool is generated during heat sealing, resulting in inconvenience that unsuccessful opening occurs. In particular, when the mass ratio PP / PE is less than 0.429, rigidity may be insufficient, and when the mass ratio PP / PE is more than 99, flexibility may be insufficient.
The polypropylene resin is specifically selected from any of four types of homopolypropylene, random polypropylene, block polypropylene, and mixtures thereof. And when heat resistance is considered, it is preferable in order of a homo polypropylene, a block polypropylene, and a random polypropylene. Moreover, when considering the sealing properties with other layers, random polypropylene, block polypropylene, and homopolypropylene are preferable in this order.
Specific examples of the polyethylene-based resin include high-density polyethylene and low-density polyethylene. Particularly, low-density polyethylene is preferably used for reasons of molding process stability.

Note that an inorganic filler such as talc may be added to the front and lower layers 22.
Moreover, although the surface lower layer 22 is laminated | stacked directly adjacent to the peeling layer 21, between the peeling layer 21 and the surface lower layer 22, it does not flow by heat seals, such as an adhesive layer, or is comparatively difficult to flow. A thin layer may be provided.

The container body 2 has a substantially circular cup shape having a predetermined depth, and has a storage recess 24 that is a recess that opens a substantially circular opening 24A. A flat portion 25A, which is a first flat portion, is disposed so as to project outward. On the outer peripheral edge of the flat portion 25A, a skirt portion 26 is bent toward the bottom of the container, specifically, obliquely downward in the vertical direction. Further, a tongue-like flat end portion 27 that is a second flat portion is extended outward from a part of the outer peripheral edge of the skirt portion 26 in parallel with the flange portion 25. The flat portion 25A and the skirt portion 26 constitute a flange portion 25 to which the lid 3 is attached.
Here, the flat end 27 extends upward when the angle formed with respect to the opening surface of the opening 24A is less than 60 °, more specifically when the position of the opening surface is 0 °. The formed angle is in the range of + 60 ° to the angle of −60 ° formed by the flat end extending downward, preferably in the range of + 30 ° to −30 °.
This is because if the angle formed by the flat end 27 with respect to the opening surface of the opening 24A is + 60 ° or more, it is difficult to open, and if it is −60 ° or more, sealing may be difficult. In addition, from the viewpoint of both the shape of the mold that forms the flat end portion 27, the manufacturability of the mold, and the sealing performance to the flat end portion 27, the angle formed with respect to the opening surface is approximately 0 °. Is preferred.

Moreover, the thickness dimension of the flange part 25 of the container main body 2 becomes like this. Preferably they are 200 micrometers or more and 2000 micrometers or less, More preferably, they are 250 micrometers or more and 1500 micrometers or less, Most preferably, they are 300 micrometers or more and 1000 micrometers or less.
Here, if the thickness of the flange portion 25 is less than 200 μm, there is a possibility that the rigidity of the container is lowered. If the thickness is greater than 2000 μm, many materials are required and the manufacturing cost (raw material cost) increases. Therefore, the above range is set.

Moreover, the notch 28 as a notch groove which is a groove | channel is provided in the flange part 25 in the state which cuts the peeling layer 21 which is a layer which faces at least the surface in which the cover body 3 is attached in the flange part 25 (FIG. 4).
Here, the notch 28 is cut at the position of the notch 28 when the lid 3 is opened even when a part of the thickness of the release layer 21 in the position of the notch 28 remains. The depth is not particularly limited as long as it does not delaminate the release layer 21 on the opening 24A side. In particular, it is preferable that the depth reaches the surface lower layer 22, that is, a depth equal to or greater than the thickness dimension of the release layer 21.
In addition, as a groove | channel in this invention, it can be set as various shapes, such as a cross-sectional V shape and a cross-sectional U shape. Further, the groove is not limited to being formed by cutting, but can be formed by various methods such as pressing and cutting.

And the easy-open container 1 is the 1st heat seal part 23 as a cyclic | annular attachment area | region by heat-sealing the flange part 25 and the cover body 3 mounted in the flange part 25 with respect to 24 A of opening parts. Is formed on the outer peripheral side of the notch 28, and the inside of the easy-open container 1 is sealed. Further, the lid 3 has a second attachment region in which an opening start portion 3A provided in a tongue shape on the outer peripheral edge is attached to the flat end portion 27 of the container body 2 over the outer peripheral edge. A heat seal portion 29 is formed and attached to the container body 2.
In order to open the easily-openable container 1 in a sealed state, as shown in FIG. 1, if the lid 3 is pulled upward at the opening start portion 3 </ b> A of the lid 3, the easy-openable container 1 can be easily used. Opened.

In the present embodiment, the lid 3 is a laminated body including an outer layer 32 that appears outside the easily openable container 1, a release layer 21 of the container body 2, and a seal layer 31 that is heat-sealed.
For the outer layer 32 constituting the lid 3, a polyethylene terephthalate (PET) film, a biaxially stretched nylon film (O—Ny), or the like can be used. The seal layer 31 can be made of a resin composition such as linear low density polyethylene (LLDPE).
Then, the container body 2 and the lid 3 are heat-sealed, whereby the release layer 21 and the seal layer 31 are fused to form the first heat seal portion 23 and the second heat seal portion 29, which are opened. In this case, the peeling layer 21 of the container body 2 that is weak against stress is peeled from the lower layer 22 from the notch 28 on the outer peripheral side.

[Seal operation]
Next, the sealing operation for attaching the lid 3 to the container body 2 will be described.

In manufacturing the easy-open container 1, a sealing device provided with an annular sealing disk is used. In order to fuse the flange portion 25 of the container body 2 and the lid body 3 so that the easily openable container 1 is in a sealed state, the lid body 3 is overlaid on the flange portion 25 of the container body 2. Heat sealing is performed by pressing an annular sealing disk in a heated state of the sealing device from the upper surface.
With this heat sealing, the opening start portion 3A provided in a tongue-like shape on the outer peripheral edge is attached to the flat end portion 27 of the container body 2 over the outer peripheral edge to form the second heat seal portion 29. The lid 3 placed on the flange portion 25 is heat-sealed to form a first heat seal portion 23 as an annular attachment region located on the outer peripheral side from the notch 28, and the easy-open container 1. The inside is sealed.
Further, in order to open the easily-openable container 1 in a sealed state, the lid 3 is pulled upward at the opening start portion 3A of the lid 3 as shown in FIG. As a result, the peeling layer 21 peels to the position of the notch 28 at the flat end portion 27 of the multilayer container body 2 between the peeling layer 21 and the surface lower layer 22. Then, after the delamination reaches the position of the notch 28, only the lid 3 is peeled off. For this reason, even if the lid 3 and the flange portion 25 of the container body 2 are firmly bonded, an easy peel is possible, and the easy-open container 1 is easily opened.

As the annular seal disk which is a seal bar, any one capable of forming the first heat seal part 23 and the second heat seal part 29 can be applied. For example, an annular seal disk 40 shown in FIG. 5 is used. preferable. The annular seal disc 40 shown in FIG. 5 has an R edge processed on the outer periphery of the upper surface of the flange portion 25, and the outer periphery is delayed from the tip of the annular seal disc 40 (tip 41 in FIG. 5). Specifically, an inclined surface portion 42 having an inclined cross section is formed on the inner peripheral edge side via the boundary A (which is also the tip 41 of the annular seal disc 40). On the outer peripheral edge side, a curved surface portion 43 that is R-processed and has a curved cross section is continuously formed.
As shown in FIG. 5, it is preferable that the inner peripheral edge of the heat seal portion 23 is provided so as not to coincide with the position of the notch 28 because high sealing performance can be obtained.

Among these, the angle (θ) that is formed from the outer peripheral edge toward the inner peripheral edge with respect to the flange portion 25 as shown in FIG. 5 in the inclined surface portion 42 formed on the inner peripheral edge side of the annular seal disc 40 is Although it varies depending on the width D of the annular seal disc 40, it is preferably set in a range of 2 ° to 20 °, preferably in a range of 3 ° to 15 °.
If the angle of the inclined surface portion 42 is smaller than 2 °, a resin reservoir portion is easily formed on the inner peripheral edge side even when pressed at the time of heat sealing, and the obtained easy-open container 1 is opened at the time of opening. There is a possibility that the resistance becomes large inside the heat seal portion 23 of 1 and it is difficult to smoothly open the easy-open container 1. On the other hand, if the angle of the inclined surface portion 42 exceeds 20 °, the periphery of the boundary A may be gently pointed, and the lid 3 may be cut at the time of sealing or opening, which may impair easy-openability. There is.

Here, with respect to the annular seal disc 40, the inclined surface portion 42 and the curved surface portion 43 are formed such that the boundary A is closer to the outer side (closer to the outer peripheral edge) with respect to the cross-sectional width direction of the annular seal disc 40. Is preferred. If the boundary A is outside with respect to the cross-sectional width direction of the annular seal disc 40, the curved surface portion 43 is formed on the outer peripheral edge side of the annular seal disc 40, and the inclined surface portion 42 is formed on the inner peripheral edge side of the annular seal disc 40. In combination, the tip 41 comes into contact with the lid 3 first from the inner peripheral edge of the annular seal disc 40 during heat sealing (the outer peripheral edge of the annular seal disc 40 comes into contact with the lid 3 after the tip 41). Is prevented, and a resin reservoir is prevented from being formed on the outer peripheral side edge of the first heat seal portion 23, and the lid 3 can be opened smoothly.

[Effects of Embodiment]
As described above, in the first embodiment, the lid body 3 is attached to the flange portion 25 provided with the skirt portion 26 of the container body 2 by the annular first heat seal portion 23 and extends from the skirt portion 26. The lid 3 is attached over the outer peripheral edge of the provided flat end portion 27.
Thus, when the flat end portion 27 is opened, delamination starts from the second heat seal portion 29 of the flat end portion 27, and the notch is extended from the second heat seal portion 29 to the first heat seal portion 23. It is peeled up to 28 and opened.
For this reason, even if the container body 2 is provided with the skirt portion 26 for the purpose of appearance, strength, handleability, etc., the structure in which one notch 28 is provided on the side of the opening 24A from the first heat seal portion 23 is also delaminated. Can be implemented. Therefore, when the first heat seal portion 23 is provided, the accuracy on the outer peripheral side of the first heat seal portion 23 is not required, the lid 3 can be easily attached, and the manufacturing apparatus is simplified. Can do.
Furthermore, by expanding the outer peripheral side of the first heat seal portion 23 to the outer peripheral edge of the flange portion 25, the sealing area of the first heat seal portion 23 can be increased, the mounting strength can be improved, and the sealing can be performed with high strength. .

In the first embodiment, the flat end portion 27 is formed to extend outward on the outer peripheral edge of the skirt portion 26.
For this reason, the flat end portion 27 and the flange portion 25 face the same upper surface on which the lid body 3 is attached, so that the lid body 3 can be attached by one operation from above, and the manufacturing efficiency can be improved.

Further, the skirt portion 26 is formed so as to extend obliquely downward from the periphery of the flange portion 25.
As a result, when the lid 3 is heat-sealed, the unsealing start portion 3A of the lid 3 is pressed and is in a state along the upper surface of the skirt portion 26. For this reason, the 1st heat seal part 23 in which the cover 3 is attached to the flange part 25, and the 2nd heat seal part 29 attached in the flat end part 27 are spaced apart, and the area | region where the cover 3 cannot be attached exists. Even if it interposes, as shown to FIG. 4 (A), a clearance gap does not arise between the cover body 3 and the skirt part 26, and it can prevent that the external appearance by a clearance gap is impaired.
Then, by forming the skirt portion 26 to extend obliquely downward, the upper surface of the skirt portion 26 faces upward. For this reason, it becomes possible to heat-seal the cover body 3 to the outer periphery of the skirt part 26, the sealing width of the 1st heat seal part 23 can be increased, and sealing performance can be improved more.

{Second embodiment}
Next, the easily openable container of 2nd embodiment of this invention is demonstrated based on drawing.
FIG. 6 is a perspective view in which a part of the easy-open container of the second embodiment is opened. FIG. 7 is a side sectional view showing a part of the easy-open container of the second embodiment, where (A) is the position of the flat end portion and (B) is the position of the skirt portion. Note that the same or similar components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 6, the easy-open container 1 of the second embodiment replaces the tongue-shaped flat end portion 27 in the easy-open container 1 of the first embodiment with a skirt from the outer periphery of the flat portion 25 </ b> A. The portion 26 and the tongue-shaped flat end portion 27 are cut off, and the outer peripheral edge of the flat portion 25A is formed as a flat end portion 27A.
Specifically, the easy-open container 1 has a first heat as an annular attachment region by heat-sealing the flange 25 and the lid 3 placed on the flange 25 with respect to the opening 24A. The seal portion 23 is formed on the outer peripheral side of the notch 28, and the inside of the easy-open container 1 is sealed. In addition, the 1st heat seal part 23 is spaced apart from the notch 28, and is formed in the outer peripheral side in order to acquire high sealing performance like embodiment shown in FIG.
The lid 3 is attached to the container body 2 so that an opening start portion 3A provided in a tongue shape on the outer peripheral edge is positioned at the flat end portion 27A of the container body 2.
At the flat end portion 27A, as shown in FIG. 7A, the lid 3 is heat sealed so that the outer peripheral edge of the first heat seal portion 23 is located. In the portion where the skirt portion 26 is provided, as in the first embodiment, as shown in FIG. 7B, the first heat seal portion 23 is formed in an annular shape by the flat portion 25A.
And in order to open the easily openable container 1 in the sealed state, as shown in FIG. 6, if the lid 3 is pulled up at the opening start portion 3A of the lid 3, the outside of the flat end portion 27A The delamination is performed from the periphery, and the easy-open container 1 is easily opened.

In the second embodiment, the outer peripheral edge of the flat portion 25A where the skirt portion 26 is not formed is defined as a flat end portion 27A, and the outer peripheral edge of the first heat seal portion 23 coincides with the outer peripheral edge of the flat end portion 27A. A lid 3 is attached to the container body 2.
For this reason, as with the first embodiment, when the flat end portion 27A is opened, delamination starts from the outer periphery of the flat end portion 27A, and the first heat seal portion 23 is delaminated to the notch 28 and opened. The
For this reason, even if the container body 2 is provided with the skirt portion 26 for the purpose of appearance, strength, handleability, etc., the structure in which one notch 28 is provided on the side of the opening 24A from the first heat seal portion 23 is also delaminated. Can be implemented. Therefore, when the first heat seal portion 23 is provided, the accuracy on the outer peripheral side of the first heat seal portion 23 is not required, the lid 3 can be easily attached, and the manufacturing apparatus is simplified. Can do.
Furthermore, by expanding the outer peripheral side of the first heat seal portion 23 to the outer peripheral edge of the flange portion 25, the sealing area of the first heat seal portion 23 can be increased, the mounting strength can be improved, and the sealing can be performed with high strength. .

[Modification]
Although the best configuration for carrying out the present invention has been disclosed in the above description, the present invention is not limited to this. That is, the present invention has been described primarily with reference to specific embodiments, but with respect to the above-described embodiments without departing from the scope of the technical idea and object of the present invention, the material, quantity, and other details. In this configuration, those skilled in the art can make various modifications.
Accordingly, the description of the materials, layer structures, and the like disclosed above is exemplary for easy understanding of the present invention, and does not limit the present invention. Descriptions with names excluding some or all of the limitations are included in the present invention.

For example, the easy-open container 1 is not limited to the configuration having the circular opening 24A, but various shapes such as a quadrangle, an ellipse, a polygon, a gourd, a tear, and a character as shown in FIG. Applicable to
In addition, when there exists a corner | angular part like the rectangle shown in FIG. 8, not only when providing the flat end part 27 in all the positions of a corner | angular, but what is necessary is just to make the flat end part 27 at least any one place.
Further, the outer peripheral side of the first heat seal portion 23 may be formed across the outer peripheral edge of the skirt portion 26. By setting it as such a structure, as mentioned above, the sealing width | variety of the 1st heat seal part 23 can be increased, and sealing performance can be improved more.

The skirt portion 26 is not limited to the case where the skirt portion 26 is formed to be inclined. For example, as shown in FIG. 9 and FIG. As shown, it may be further bent or may be bent so as to be gently curved from the flange portion 25 to the skirt portion 26.
In addition, in the easily openable container 1 of embodiment shown to FIG. 9 and FIG. 10, the flat edge part 27 is formed so that it may protrude outside.
Further, the flat end portion 27 may be formed so as not to protrude parallel to the flange portion 25 but to be inclined obliquely downward. In this case, as described above, the second heat seal portion 29 can be formed together with the first heat seal portion 23 by setting the angle to be less than −60 °, preferably −30 ° or less with respect to the horizontal plane. Therefore, it is preferable.

And the 1st heat seal part 23 and the 2nd heat seal part 29 may be formed continuously.
Accordingly, delamination starting from the second heat seal portion 29 of the flat end portion 27 at the time of opening continuously proceeds from the region attached to the skirt portion 26 to the first heat seal portion 23 with the flange portion 25. Therefore, delamination can proceed smoothly and a smooth opening feeling can be provided. In particular, in the configuration in which the skirt portion 26 is formed to be inclined and extend from the peripheral edge of the flange portion 25, the skirt portion 26 and the lid 3 can be easily attached, and a configuration in which a smooth opening feeling can be obtained is easily manufactured. it can.

Moreover, although the 2nd heat seal part 29 was provided and demonstrated over the whole outer periphery of the flat end part 27, as shown, for example in FIG. 11, the edge of the front-end | tip part of the flat end part 27 where opening is started You may provide the 2nd heat seal part 29 over only.
And the 1st heat seal part 23 may be provided apart from the notch 28, or may be provided from the position of the notch 28.

Further, the attachment of the lid 3 is not limited to the case where the opening is sealed in a state of being attached to the flange portion 25. For example, as shown in FIG. 12, a lid provided with a window portion such as a hole or a notch is attached. It is good also as a structure which obstruct | occludes a part of opening.
Moreover, the attachment of the container main body 2 and the lid 3 is not limited to heat sealing, and various methods such as welding by ultrasonic waves and adhesion by an adhesive or an adhesive can be used.

DESCRIPTION OF SYMBOLS 1 ... Easy-open container which is a container 2 ... Container main body 3 ... Lid which is a lid | cover 23 ... 1st heat seal part as a 1st attachment area which is an attachment area 24 ... Storage which is a recessed part Recess 24A ... Opening 25 ... Flange 25A ... Flat part as first flat part 26 ... Skirt part 27, 27A ... Flat end part as second flat part 28 ... Incision groove as groove The second notch 29 is a second heat seal portion as a second attachment region, which is an attachment region 40 ...... Annular sealing disc 43 which is a seal bar 43 …… Curved surface portion

Claims (12)

A storage recess having an opening for storing an object to be packaged, a flat portion extending from the outer peripheral edge of the opening, and bent from the outer peripheral edge of the flat portion toward the bottom of the container body. A container body having a multilayer structure in which the opening portion is closed by attaching a lid to the flange portion.
The container body is provided in an annular shape so as to be positioned closer to the opening side than a flat end portion extending outward from the outer peripheral edge of the skirt portion and an attachment region to which the lid body is attached in the flange portion. A cutting groove that cuts at least one layer facing the surface to which the lid is attached in the flange portion,
The attachment region has a first attachment region provided in an annular shape on the flange portion, and a second attachment region provided over at least a part of the outer peripheral edge of the flat end portion. Body. The container body according to claim 1,
The container main body characterized in that the flat end portion is formed to extend outward on an outer peripheral edge of the skirt portion. The container body according to claim 2,
The container main body, wherein the flat end portion is formed to extend within an angle of less than 60 ° with respect to the opening surface of the opening. The container body according to any one of claims 1 to 3,
The container body according to claim 1, wherein the skirt portion is formed to be inclined and extend from a peripheral edge of the flat portion. The container body according to any one of claims 1 to 4,
The container body, wherein the second attachment region and the first attachment region are formed continuously. A concave portion, a first flat portion formed extending from an edge of the opening of the concave portion, and a skirt portion formed bent from the outer peripheral edge of the first flat portion toward the bottom side of the concave portion. A container body having a laminated structure in which at least a part of the opening is closed by attaching a lid to the first flange portion,
The flange portion includes a second flat portion extending outward from the outer peripheral edge of the skirt portion with respect to the concave portion, and an annular first portion to which the lid of the first flange portion is attached. A groove that is provided on the edge side of the opening from the attachment region and is provided in an annular shape and cuts at least one layer facing the surface to which the lid is attached in the flange portion;
A container body, wherein a second attachment region to which the lid is attached is provided over at least a part of the outer peripheral edge of the second flat portion. A storage recess having an opening for storing an object to be packaged, a flat portion extending from the outer peripheral edge of the opening, and bent from the outer peripheral edge of the flat portion toward the bottom of the container body. A container body having a multilayer structure in which the opening portion is closed by attaching a lid to the flange portion.
The container body is
At least a part of the outer peripheral edge of the flat portion of the flange portion is not formed by bending the skirt portion,
A notch groove for cutting at least one layer facing the surface to which the lid body is attached in the flange portion, which is provided in an annular position on the opening side from the annular attachment region to which the lid body is attached in the flange portion; Have
A container body, wherein an outer peripheral edge of a flat portion where the skirt portion is not bent is coincident with an outer peripheral edge of the annular attachment region. A concave portion, a flat portion formed extending from an edge of the opening of the concave portion, and a flange portion having a skirt portion bent from the outer peripheral edge of the flat portion toward the bottom side of the concave portion. A container body having a laminated structure in which at least a part of the opening is closed by attaching a lid to the flange portion;
In the flange portion, at least a part of the outer peripheral edge of the flat portion is not formed by bending the skirt portion,
A groove for cutting at least one layer facing the surface to which the lid is attached in the flange portion, which is annularly provided on the opening side from the annular attachment region to which the lid in the flange portion is attached;
The container main body characterized in that at least a part of an outer peripheral edge of the flat portion where the skirt portion is not bent is coincident with an outer peripheral edge of the annular attachment region. The container body according to any one of claims 1 to 6,
A lid attached to the flange portion of the container body and closing the opening;
The container body is formed such that at least one interlayer adhesive force of a laminated structure constituting the container body is smaller than an adhesive force between the flange portion and the lid. A storage recess having an opening for storing an object to be packaged, a flat portion extending from the outer peripheral edge of the opening, and bent from the outer peripheral edge of the flat portion toward the bottom of the container body. A container body having a multi-layered structure including a flange portion having a skirt portion, and a method for producing a container for closing the opening by attaching a lid to the flange portion,
The container body is provided in an annular shape so as to be positioned closer to the opening side than a flat end portion extending outward from the outer peripheral edge of the skirt portion and an attachment region to which the lid body is attached in the flange portion. And a slit having a cut groove for cutting at least one layer facing the surface to which the lid is attached in the flange portion,
The lid is attached to the flange portion in an annular manner in the attachment region in a state where at least one interlayer adhesive force of the multilayer structure constituting the container body is smaller than the adhesive force between the flange portion and the lid. The lid is attached to the flat end over at least a part of the outer peripheral edge of the flat end. The container body according to any one of claims 1 to 5,
A lid that is attached to the flange portion of the container body and closes the opening,
The container according to claim 1, wherein the first attachment region is formed by an annular seal bar having a curved surface at a position corresponding to at least the flat end portion of the outer peripheral edge. The container according to claim 8,
The container according to claim 1, wherein the first attachment region is formed by a curved surface around the outer periphery of the seal bar.

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