JP6280727B2 - Container body, container and container manufacturing method - Google Patents

Description

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

Conventionally, for example, as a container for foods, the top film is heat-sealed to the flange portion of the container body made of a multilayer sheet and firmly sealed, and when opened, it is easily opened by delamination of the multilayer sheet constituting the container body The structure which can be performed is known (for example, refer patent document 1).
This container weakens the interlayer adhesive force of the inner and outer layers in the multilayer sheet constituting the container main body from the adhesive force between the flange portion and the top film. 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 container is opened by peeling the inner layer of the container main body from the outer peripheral edge to the position of the cut groove together with the top film.

JP 62-251363 A

However, for example, when food is sealed in a container, when the top film is heat-sealed to the flange, or when heat treatment is performed for cooking or sterilization, the flange rises upward due to the tension of the top film. May be deformed and the appearance may be impaired.
An object of the present invention is to provide a container main body, a container, and a method for manufacturing the container that can prevent the flange portion from rising due to the tension of the lid.

The container body of the present invention has a layer structure of at least two layers of an innermost layer provided on a side capable of storing an object to be packaged and a layer provided along the innermost layer, and accommodates the object to be packaged. a housing recess having an opening, a flange portion extending from an outer peripheral edge of the opening, a container body Ru wherein the flange portion, the peripheral edge in the vertical direction of the opening edge of the opening is bent downward, the bent portion provided in an annular shape along the opening edge, an annular attachment region lid that give mounted for closing the opening, the opening side of the attachment region of the annular provided in the ring-shaped, anda cut groove formed in at least the innermost layer and have contact with the flange portion, the mounting area of the annular, the bending along the entire circumference of the outer peripheral edge of the bent portion so as to be positioned in parts, characterized in that it is eclipsed set to the flange portion

Cyclic In the present invention, the flange portion peripheral edge has a bent portion of the annular bent downward in the vertical direction than the opening edge of the opening, that the entire circumference of the outer peripheral edge of the bent portion, obtained the lid is attached A mounting area is provided. Thus, when the lid is attached to the annular attachment region, and the tension of the lid acts on the flange portion, the peripheral side bent downward from the opening edge in the bent portion is lifted, and the state is substantially horizontal become. For this reason, it can prevent that a flange part rises from an opening part with the tension | tensile_strength of a cover body, and an external appearance is impaired. Moreover, since the packaged item falls to the outer peripheral edge of the flange part at the top of the bent part and does not easily remain on the flange part, the packaging object remaining on the flange part causes poor mounting of the lid. Can also be prevented.
Here, the term “bent” includes a state in which it is bent and is bent at an angle with a broken line, and a state in which it is bent so as to be bent without a broken line. Further, the term “annular” includes a round shape and a polygonal shape having a plurality of corners.

And in this invention, the said attachment area | region is provided in the said flange part so that it may be located in the said bending part over the perimeter of the outer periphery of the said bending part .
As a result , the tension of the lid acts uniformly in the circumferential direction of the bent portion, and uniform roll-up prevention is obtained in the circumferential direction of the flange portion, and a better appearance is obtained. Furthermore, delamination can be started from any position on the outer peripheral edge of the flange portion, and the unsealing property can be improved.

Moreover, in this invention, it is preferable that the said bending part has an inclined surface part which inclines to an outer periphery side.
In this invention, by providing an inclined surface portion inclined toward the peripheral edge in the bent portion, the lid can be easily attached on the flat surface of the inclined surface portion inclined and can be easily manufactured.

Furthermore, in the present invention, the inclined surface portion is preferably formed to be inclined at an angle of 0.1 ° to 60 ° with respect to a horizontal plane.
In this invention, by forming the inclined surface portion by inclining at an angle of 0.1 ° to 60 ° with respect to the horizontal surface, the lid body can be easily attached to the flange portion, and the flange portion can be attached by the tension of the lid body. It is possible to prevent an appearance defect that rises upward from the opening even in a state of rising.
Here, when the inclination angle of the inclined surface portion is smaller than 0.1 °, a state in which the flange portion rises due to the tension of the lid body appears remarkably, and the appearance may be impaired. On the other hand, when the inclination angle of the inclined surface portion is larger than 60 °, it is difficult to attach the lid, and there is a possibility that the production efficiency cannot be improved. For these reasons, the inclination angle of the inclined surface portion is set to 0.1 ° or more and 60 ° or less.

In the present invention, it is preferable that the bent portion is further bent at the peripheral side.
According to the present invention, a plurality of bent portions may be bent so that a plurality of bent portions may be bent in response to a state in which the flange portion rises according to the tension of the lid body to be attached. A state can be prevented.

And in this invention, it is preferable that the said to-be packaged object is a foodstuff.
In this invention, it is sealed so that air does not enter, and is particularly effective for foods in which tension tends to act on the lid.

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 at least one layer indirect of the layer structure constituting the container main body force application is characterized by not being small Ri by adhesion between the lid and the flange portion.
In this invention, when the lid is attached to the annular attachment region, and the tension of the lid acts on the flange portion, the peripheral side bent downward from the opening edge in the bent portion is lifted, and the state is substantially horizontal Since the container main body of the present invention to be used is used, it is possible to prevent the flange portion from rising up from the opening due to the tension of the lid and the appearance from being damaged. In addition, since the package body is a container body that falls to the outer peripheral edge of the flange portion at the top of the bent portion and does not easily remain on the flange portion, the lid body is covered by the package material remaining on the flange portion. It is also possible to prevent the mounting failure.

The container manufacturing method of the present invention has a layer structure of at least two layers of an innermost layer provided on a side capable of storing an object to be packaged and a layer provided along the innermost layer, a housing recess having an opening for accommodating a flange portion extending from an outer peripheral edge of the opening, the container body with a method of manufacturing a container for closing the opening attach the lid The flange portion of the container body has a peripheral edge bent downward in the vertical direction from the opening edge of the opening portion, and a bent portion provided annularly along the opening edge, and the lid body. an annular attachment region that give mounted, provided in the ring-shaped than the annular attachment region for the opening side, and a cut groove formed in at least the innermost layer and have contact with the flange portion has, the At least one of the interlayer adhesion of the layer structure constituting the container body, the full Used as a Nji section smaller than the adhesive force between the cover so as to be positioned on the bent portion over the entire circumference of the outer peripheral edge of the bent portion, the mounting area of the annular provided in the flange portion characterized by Fit the said lid.

In the present invention, using a container body having a bent portion of the annular rim on the flange portion is bent downward in the vertical direction than the opening edge of the opening, Oite the flange portion of the container body, the outer peripheral edge of the bent portion The lid is attached to an annular attachment region provided so as to be located at the bent portion over the entire circumference . As a result, when the tension of the attached lid body acts on the flange portion, the peripheral side bent downward from the opening edge in the bent portion is lifted, and the state is substantially horizontal. For this reason, it can prevent that a flange part rises from an opening part with the tension | tensile_strength of a cover body, and an external appearance is impaired. Moreover, since the packaged item falls to the outer peripheral edge of the flange part at the top of the bent part and does not easily remain on the flange part, the packaging object remaining on the flange part causes poor mounting of the lid. Can also be prevented.

The perspective view which opened a part which shows the easy-open container of 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. It is side surface sectional drawing which shows a part of said easily openable container, (A) is the position of II in FIG. 2, (B) is the position of II-II in FIG. The perspective view which opened a part which shows the easily openable container in other embodiment of this invention. The top view which shows the easily openable container in other embodiment of this invention. The side view which shows the said easily openable container. Side surface sectional drawing which shows a part of said easily openable container. The top view which shows the easily openable container in other embodiment of this invention. The side view which shows the said easily openable container. Side surface sectional drawing which shows a part of easily openable container in other embodiment of this invention. Side surface sectional drawing which shows a part of easily openable container in other embodiment of this invention. The top view which shows a part of easily openable container in other embodiment of this invention. Side surface sectional drawing which shows a part of easily openable container in other embodiment shown in FIG. Side surface sectional drawing which shows a part of easily openable container in other embodiment of this invention. Side surface sectional drawing which shows a part of 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.

[Configuration of easy-open container]
1 to 3 show an easily openable container 1 which is a container according to the present invention. The easy openable container 1 includes a container body 2 in which an article to be packaged is stored and a lid 3 attached to the container body 2. I have.
As shown in FIG. 1 and FIG. 2, the easy-open container 1 includes a lid 3 that is held by a heat seal portion 23 by gripping an opening start end 3 </ b> A in which a part of the lid 3 protrudes in a tongue shape. It peels from the flange part 25 and is opened. In addition, the heat seal part 23 is the opening start position that is the position of the opening start end 3 </ b> A, and covers the outer periphery of the flange part 23 so as to bulge outward from the outer peripheral side of the heat seal part 23. Is opened, and delamination is started from the opening heat seal portion 29 to be opened. The portion where the unsealing heat seal portion 29 is not provided is provided at a position where the outer peripheral edge of the heat seal portion 23 is separated from the outer peripheral edge of the flange portion 25. Therefore, since the delamination cannot be started from the position where the opening heat seal portion 29 is not provided, it is possible to prevent unintentional opening.

(Container structure)
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 details will be described later, the heat seal portion 23 as an 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.
For the lower surface layer 22, a material having a loss tangent tan δ at 165 ° C. of less than 0.18, preferably 0.10 or less, particularly preferably 0.07 or less is used.
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 opens a substantially circular opening 24A. A flat portion 25A is disposed so as to overhang.
The outer peripheral edge of the flat portion 25A has a skirt portion 25B as a bent portion that is bent obliquely downward in the vertical direction from the opening edge of the opening 24A. That is, the skirt portion 25B is formed to have an inclined surface portion 25B1 that is inclined obliquely downward on the outer peripheral edge facing upward and outward. The flat portion 25A and the skirt portion 25B constitute a flange portion 25 to which the lid 3 is attached.
Furthermore, the skirt portion 25 </ b> B has an opening start end 25 </ b> C extending in a tongue-like shape outwardly in parallel with the flange portion 25 at a part of the outer peripheral edge.

Here, the inclined surface portion 25B1 is formed to be inclined at an angle of 0.1 ° to 60 °, preferably 5 ° to 55 °, particularly preferably 15 ° to 50 ° with respect to the horizontal plane.
When the inclination angle of the inclined surface portion 25B1 is smaller than 0.1 °, a state in which the flange portion 25 rises due to the tension of the lid 3 appears significantly, and the appearance may be impaired. On the other hand, when the inclination angle of the inclined surface portion 25B1 is greater than 60 °, it is difficult to heat-seal the lid 3 together with the heat seal portion 23 from above with one operation, and it may not be possible to improve manufacturing efficiency. For these reasons, the inclination angle of the inclined surface portion 25B1 is preferably set to 0.1 ° or more and 60 ° or less.

The thickness of the flange portion 25 of the container body 2 is preferably 200 μm or more and 2000 μm or less, more preferably 250 μm or more and 600 μm or less, and particularly preferably 300 μm or more and 500 μm 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 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 to which the cover body 3 is attached in the flange part 25 (refer 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.

  The easy-open container 1 has the flange portion 25 and the lid 3 placed on the flange portion 25 with respect to the opening 24A being heat-sealed so that the heat seal portion 23 as an annular attachment region has a notch 28. It is located on the outer peripheral side, and the inside of the easy-open container 1 is sealed. Further, the lid 3 has an opening start portion 3A provided in the form of a tongue on the outer peripheral edge, and is attached to the opening start end 25C of the container body 2 over the outer peripheral edge to form an opening seal portion 29. 2 is attached.

(Structure of the lid)
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.
As 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, by heat-sealing the container body 2 and the lid 3, the release layer 21 and the seal layer 31 are fused to form the heat seal portion 23 and the opening seal portion 29. On the other hand, the peeling layer 21 of the container body 2 that is weak against the peeling is peeled off from the notch 28 and the outer lower layer 22 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.
By this heat sealing, the opening start portion 3A provided in the form of a tongue on the outer peripheral edge is attached to the opening start end 25C of the container body 2 over the outer peripheral edge to form the opening heat seal portion 29, and the flange The lid 3 is heat-sealed at the flat portion of the portion 25, and a heat seal portion 23 as an annular attachment region is formed on the outer peripheral side from the notch 28, and the inside of the easy-open container 1 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, peeling occurs between the release layer 21 and the lower layer 22 at the opening start end 25C of the container body 2 having a multilayer structure, and the release layer 21 peels to the position of the notch 28. 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. In addition, since delamination cannot be started in parts other than the opening start end 25C, it is possible to prevent unintentional opening by strong heat sealing.

[Effect of the embodiment]
As described above, in the above embodiment, the lid 3 is connected to the outer peripheral edge of the flange portion 25 on the flange portion 25 having the annular skirt portion 25B whose peripheral edge is bent downward in the vertical direction from the opening edge of the opening portion 24A. It attaches with the heat seal part 23 which reaches the outer periphery of the skirt part 25B which becomes.
As a result, when the tension of the attached lid 3 acts on the flange portion 25, the peripheral side bent downward from the opening edge in the skirt portion 25B is lifted and is in a substantially horizontal state. For this reason, it can prevent that the flange part 25 rises upwards from the opening part 24A by the tension | tensile_strength of the cover body 3, and an external appearance is impaired.
When the packaged item is food, the lid 3 is attached so that air is not sealed so that the packaged item can be stored for a long period of time. For this reason, it is particularly effective in the case of food applications in which the lid 3 contracts and tension acts during heat sealing and heat sterilization treatment after heat sealing.
Further, since the article to be packaged falls to the outer peripheral edge of the flange part 25 at the position of the top of the skirt portion 25B and does not easily remain on the flange part 25, the lid 3 is covered by the article to be packaged remaining on the flange part 25. It is possible to prevent the mounting failure.

And in the said embodiment, the cover body 3 is attached over the perimeter of the outer periphery of the flange part 25. FIG.
For this reason, the tension of the lid body 3 acts uniformly in the circumferential direction of the flange portion 25, and the rise of the flange portion 25 becomes uniform in the circumferential direction, thereby preventing appearance defects due to partial rise prevention. Better appearance can be obtained. Furthermore, delamination can be started from any position on the outer peripheral edge of the flange portion 25, and the unsealing property can be improved.

Further, the skirt portion 25A is formed in a planar shape having an inclined surface portion 25B1 that inclines toward the outer peripheral edge.
For this reason, by providing the skirt portion 25A with the inclined surface portion 25B1 inclined to the peripheral edge side, the shape of the annular seal disc for attaching the lid 3 to the skirt portion 25A located on the outer peripheral edge of the flange portion 25 is changed to the inclined surface portion 25B1. What is necessary is just to use what was formed in the planar shape according to. Therefore, the lid 3 can be easily formed on the skirt portion 25B, and the easily openable container 1 that can prevent the appearance from being damaged can be easily formed. Furthermore, the shape of the annular sealing disk can be prevented from becoming complicated, and the annular sealing disk can be easily formed.

And it inclines at an angle of 0.1 degree or more and 60 degrees or less with respect to a horizontal surface, and forms inclined surface part 25B1.
For this reason, even if the flange portion 25 rises due to the tension of the lid 3, it is possible to better prevent an appearance defect that rises above the opening 24 </ b> A, and to align the lid 3 with the flat portion of the flange portion 25. Thus, the heat seal with the lid 3 in the skirt portion 25B can be performed by one operation as in the conventional case, and the production efficiency can be prevented from being impaired.

[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 square shown in FIG. 5, not only when providing the opening start end 25C in all the positions of a corner, but what is necessary is just to make at least any one place the opening start end 25C.

And although the opening start end 25C was provided in the flange part 25, the opening start end 25C is not provided, for example like embodiment shown in FIGS. You may make it heat-seal.
6-8, it forms so that the outer periphery of the cover body 3 may extend from the outer periphery of the skirt part 25B, and the whole outer periphery of the cover body 3 becomes the opening start part 3A. .
With this configuration, delamination can be performed from any position on the outer periphery, and opening workability can be improved.

Moreover, it is not limited to the case where heat sealing is performed on the entire circumference of the outer peripheral edge of the flange portion 25. For example, as in the embodiment shown in FIGS. You may make it seal.
In such a configuration, the lid 3 is heat-sealed so that the opening start portion 3 </ b> A is positioned corresponding to the portion extending over the outer peripheral edge of the flange portion 25.
In the configuration as shown in FIG. 9 and FIG. 10, since it is difficult to open except for the opening start portion 3A, unnecessary opening can be prevented.

The flange portion 25 is not limited to the configuration in which the skirt portion 25B is formed by bending the rim downward, that is, the skirt portion 25B is provided on the rim of the plane portion. For example, as shown in FIG. The outer peripheral edge may be bent downward from the opening edge from the opening edge, and the flange portion 25 may be inclined like the skirt portion 25B.
In the configuration shown in FIG. 11, when the tension of the lid body 3 is applied, the entire flange portion 25 rises, and the appearance defect due to the rise can be prevented better.
Further, the inclination angle of the skirt portion 25B is not limited to 0.1 ° or more and 60 ° or less.

Further, as shown in FIG. 12, the flange portion 25 may be formed to be curved downward.
That is, the amount of deformation is increased so as to rise by the tension of the lid body 3 along the peripheral edge side that is the free end of the flange portion 25. For this reason, in the structure shown in FIG. 12, even if the tension | tensile_strength of the cover body 3 acts on the flange part 25, it will be in the state which the flange part 25 is rolled up in the planar shape along a horizontal surface, and a favorable external appearance will be obtained.
As shown in FIG. 12, the heat seal portion 23 may be formed on the outer peripheral side from the position of the notch 28. Thus, even if the notch 28 and the heat seal part 23 are separated from each other, delamination is performed up to the position of the notch 28.

  As shown in FIGS. 13 and 14, the flange portion 25 may be formed by bending a flange portion 25 </ b> D along the horizontal plane on the outer peripheral edge of the skirt portion 25 </ b> B. In the case of the flange portion 25 that is bent in such a multistage manner, the heat seal portion 23 may be provided on the flange portion 25D that is far from the notch 28 and is along the horizontal plane. This eliminates the need for highly accurate positioning during heat sealing and facilitates the work of attaching the lid 3.

Further, as shown in FIG. 15, the flange portion 25 may be configured to be bent a plurality of times so as to bend downward and further bend the peripheral side toward the side.
In particular, in the portion corresponding to the opening start portion 3A, the opening start portion 3A is in a state of extending laterally, and thus the opening operation is facilitated. Further, as in the configuration shown in FIGS. 13 and 14, heat sealing can be easily performed by heat sealing at a position far from the notch 28 and in a region substantially along the horizontal plane.

Moreover, the container main body 2 can be made into the shape according to various uses, such as the shape which has the level | step difference 27, as shown in FIG.
And if the cover body 3 is attached over at least a part of the outer periphery of the skirt portion 25B, it may not be attached over the entire periphery of the outer periphery of the skirt portion 25B. That is, only the position corresponding to the opening start portion 3A reaches the outer peripheral edge of the skirt portion 25B, and the heat sealing may be performed only to the middle of the skirt portion not reaching the outer peripheral edge.
Moreover, the heat seal part 23 may be provided apart from the notch 28 as in the embodiment shown in FIGS. 1 to 4, or may be provided from the position of the notch 28 as in the embodiment shown in FIG. 14. .

DESCRIPTION OF SYMBOLS 1 ......... Easily openable container which is a container 2 ......... Main body 3 ......... Cover body 23 ......... Heat seal part 24 which is a mounting area 24 ......... Storage recessed part 24A ... Opening part 25 ......... Flange Part 25A ...... Skirt part as a bent part 25B1 ... Inclined surface part 25C ... Opening start end 28 ......... Notch which is a cut groove

Claims (7)

A storage having an at least two layer structure of an innermost layer provided on a side capable of storing an object to be packaged and a layer provided along the innermost layer, and having an opening for storing the object to be packaged a recess, and a flange portion extending from an outer peripheral edge of the opening, a container body Ru provided with,
The flange portion is
A peripheral edge is bent downward in the vertical direction from the opening edge of the opening, and a bent portion provided in an annular shape along the opening edge;
An annular attachment region lid for closing the opening that obtained attached,
Wherein the annular attachment region provided on the opening side to a ring shape, has a cut groove formed in at least the innermost layer and have contact with the flange portion,
Attachment area of the annular, so as to be located in the bent portion over the entire circumference of the outer peripheral edge of the bent portion, the container body is characterized in that it eclipsed set to the flange portion. The container body according to claim 1 ,
The said bending part has the inclined surface part which inclines to an outer periphery side. The container main body characterized by the above-mentioned. The container body according to claim 2 ,
The inclined body is formed to be inclined at an angle of 0.1 ° to 60 ° with respect to a horizontal plane. The container body according to any one of claims 1 to 3 ,
The container body characterized in that the bent portion is further bent at the peripheral side. The container body according to any one of claims 1 to 4 ,
The container body characterized in that the package is food. 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,
At least one of the interlayer adhesion, the container, characterized in that has a small Ri by adhesion between the lid and the flange portion of the layer structure constituting the container body. A storage having an at least two layer structure of an innermost layer provided on a side capable of storing an object to be packaged and a layer provided along the innermost layer, and having an opening for storing the object to be packaged a recess, and a flange portion extending from an outer peripheral edge of the opening, the container body with a method of manufacturing a container for closing the opening attach the lid,
As the container body,
The flange portion is
A peripheral edge is bent downward in the vertical direction from the opening edge of the opening, and a bent portion provided in an annular shape along the opening edge;
An annular attachment region the lid is that obtained attached,
Provided in the ring shape on the opening side of the attachment region of the annular, the cut groove formed in at least the innermost layer and have contact with the flange portion has,
At least one of the interlayer adhesion of the layer structure constituting the container body is smaller than the adhesive strength between the lid and the flange portion
Use things
So as to be positioned on the bent portion over the entire circumference of the outer peripheral edge of the bent portion, the annular attachment region provided in the flange portion, fabrication of the container, characterized in that Fit the said lid Method.

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