JP2017178331A - Container and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container which can be easily used by all people including older people.SOLUTION: A container has a container body 1 and a seal lid 2. The container body 1 comprises a bottom part 11, a trunk 12, a flange part 14 and an extension part 15. The trunk 12 is erected from an outer periphery of the bottom part 11. An opening part 13 is formed on an upper end of the trunk 12. The flange part 14 is extended outward from the opening part 13. The seal lid 2 has a seal lid body 21 and a tab part 22. The seal lid body 21 covers the opening part 13 and thermal deposited to the flange part 14. The tab part 22 is continuous on one side 21a of the seal lid body 21. The seal lid 2 is one flat resin film. The extension part 15 is extended to be inclined downward from the one side 14a of the flange part. In almost plan view, the extension part 15 is at a position corresponding to the tab part 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container and a method for manufacturing the container.

  Food and the like are circulated sealed in a plastic packaging container. The container includes a container body and a seal lid. A container main body is comprised from a bottom part, a trunk | drum, and a flange part. The seal lid is thermally welded to the flange portion.

  General food production and distribution will be described. In the container molding factory, the container body and the seal lid are molded and shipped from the container molding factory to the food factory. In the food factory, the contents are filled, the flange portion and the seal lid are thermally welded, and the contents are sealed. In this state, the product is shipped from the food factory to the store. The consumer purchases the product at the store, peels off the seal lid, and eats the contents.

  When handling food, it is necessary to pay particular attention to hygiene, such as preventing contamination by germs. Also, if the food is semi-solid such as jelly or sheep, it is easy to leak from the container. Therefore, it is important that the basic performance of the container is not easily peeled off (sealing property).

  On the other hand, food is eaten on a daily basis, and consumers expect it to be easy to peel off (openability). As described above, the container is required to have a contradictory performance between the sealing performance and the opening performance, and it is important to realize the two performances in a balanced manner.

  Various techniques have been proposed for this problem. For example, the flange of the container has a multilayer structure including a base layer and a release layer. By tightly bonding the flange and the seal lid, sealing performance is secured. On the other hand, at the time of opening, the release layer is peeled off together with the sealing lid from the container, thereby ensuring the opening (Patent Document 1).

  However, since the container of Patent Document 1 has a complicated configuration, the manufacturing cost cannot be ignored and it is difficult to say that the container is generally used. In practice, it is common to ensure sealing performance by increasing the sealing strength, such as by increasing the welding area, and to realize opening performance by extending a small tongue-like tab on the outer edge of the seal lid (Patent Document 2). ). The consumer grasps the container with the finger of one hand, picks the tab with the finger of the other hand, pulls it up, and peels off the sealing lid.

  When transported from the food factory to the store, the tabs or the tab and the adjacent container come into contact with each other, and the seal lid may be peeled off via the tab, and the contents may leak. Moreover, even if there is no leakage of the contents, the commercial value is lost simply by the tab being bent or bent. Also, if the tab is too large, the overall aesthetics will be impaired. Therefore, the tab is preferably as small as possible.

JP 2009-34986 A JP 2004-026222 A

  By the way, in recent years, an aging society has advanced rapidly, and the response is required. In other words, even if it can be performed without any problem by general consumers other than the elderly, the elderly may feel inconvenience because their physical functions are generally lowered.

  For example, consumers other than the elderly can pick up relatively small tabs without problems. However, for older people, the tabs are sometimes too small to pick up well. Even if you can grasp it, the tab is too small and the force is not transmitted well. In addition, as visual aging progresses, the tabs are too small and the position of the tabs may not be known. If you don't know where the tabs are, you'll be confused about where to open them.

  Although it may be possible to display the opening position and the opening method on the seal lid, there is a limit to the display size such as the opening position because there is a need to display the product name and the like, and there are restrictions on the design.

  Thus, the conventional general container was difficult to open for the elderly.

  This invention solves the said subject and aims at providing a container which is easy to use for all consumers including elderly people.

  In order to achieve the above object, the container of the present invention includes a container body and a seal lid. The container main body has a bottom, a barrel erected from the outer periphery of the bottom, an opening formed at the upper end of the barrel, and a flange extending outward from the opening. The seal lid includes a seal lid body that covers the opening and is thermally welded to the flange portion, and a tab portion that is continuous with the seal lid body. The extending portion is extended so as to be inclined downward from a part of the flange portion corresponding to the tab portion.

  The extension portion is inclined downward, while the tab portion is horizontal. Thereby, a clearance is formed between the extended portion and the tab portion. The tab portion can be made relatively large. Thereby, opening can be induced visually and tactilely.

  Preferably, in the above invention, a range in which the extended portion of the outer peripheral portion of the flange portion is not extended matches a range in which the tab portion is not continuous in the outer peripheral portion of the seal lid main body. The flange portion and the seal lid main body are welded at least in the matching range of the outer periphery.

  Thereby, opening can be guided more visually and tactilely.

  Preferably, in the above invention, the outer peripheral portion of the flange portion and the outer peripheral portion of the seal lid body are polygonal, and the extending portion is continuous on one side of the polygon of the outer peripheral portion of the flange portion, The tab portion is continuous on one side of the polygon of the outer peripheral portion of the seal lid body.

  The present invention can be applied to a polygonal container including a quadrangle.

  Preferably, in the above-described invention, a throat that protrudes outward is formed corresponding to the extended portion of the inner peripheral portion of the flange portion.

  Thereby, a relatively large tab part center is pinched and it can open easily.

  Preferably, in the above invention, a strong seal portion is provided along a range of the inner periphery of the shed and the flange portion that does not correspond to the shed, and is inside the strong seal portion, In a corresponding range, a first weak seal portion weaker than the strong seal portion is provided, and a second weak seal portion weaker than the strong seal portion is provided outside the strong seal portion.

  Thereby, an openability and a sealing performance can be improved.

  Preferably, in the above invention, the container is filled with the contents through the opening, the seal lid main body and the flange are welded, and the extended portion of the outer peripheral portion of the flange portion is not extended. Is cut to a predetermined width.

  Thereby, the range in which the extending portion of the outer peripheral portion of the flange portion is not extended and the range in which the tab portion is not continuous in the outer peripheral portion of the seal lid body coincide with each other. In addition, the flange portion and the seal lid main body are surely welded to the matching range of the outer periphery.

  According to the present invention, the opening position is clear, it can be easily recognized even by elderly people, and the tab can be easily picked. As a result, the present container is easy to use for all persons including the elderly.

Outline structure of container Schematic configuration of container body (first embodiment) Schematic configuration of container body (second embodiment) Illustration of container manufacturing method Opening operation explanatory diagram (general consumers) Opening operation explanatory diagram (old people) Opening operation explanatory diagram (old people) Opening operation explanatory diagram (old people) Array state diagram Schematic configuration of container flange (third embodiment) Schematic configuration of container body (fourth embodiment) Schematic configuration of container body (fourth embodiment) Schematic configuration of container body (fifth embodiment) Schematic configuration of container body (sixth embodiment) Schematic configuration of container body (sixth embodiment)

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

-Configuration of the first embodiment-
FIG. 1 is a schematic configuration diagram of a container according to the first embodiment. The container of the first embodiment is rectangular. The container includes a container body 1 and a seal lid 2. FIG. 2 is a schematic configuration diagram of the container body 1 according to the first embodiment.

  The container body 1 is a resin container having a bottom part 11, a body part 12, and a flange part 14 as a basic configuration. The bottom 11 is rectangular. The trunk portion 12 is erected while being inclined slightly outward from the four outer peripheral sides of the bottom portion 11. A rectangular opening 13 is formed at the upper end of the body 12. The flange portion 14 extends outward from the opening portion 13. The outer peripheral part of the flange part 14 is rectangle 14a-d.

  The seal lid 2 includes a seal lid main body 21 and a tab portion 22. The seal lid body 21 covers the opening 13 and is thermally welded to the flange portion 14. The outer peripheral part of the seal lid main body 21 is rectangular 21a-d. The tab portion 22 continues on one side 21 a of the seal lid main body 21. The tab portion 22 is not thermally welded to the flange portion 14. For convenience of explanation, the seal lid 2 is divided into the seal lid main body 21 and the tab portion 22, but it is actually a single flat resin film. For example, PET or the like is preferably laminated on the support layer, and the support layer is composed of PET (2 μm) / NY (15 μm).

  Further, the container body 1 has an extending portion 15 as a characteristic configuration. The extending portion 15 extends so as to be inclined downward from one side 14a of the flange portion. The extended portion 15 is in a position corresponding to the tab portion 22 in a substantially plan view.

  That is, the extended portion 15 is inclined downward, while the tab portion 22 is horizontal. Thereby, the clearance 3 is formed between the extended portion 15 and the tab portion 22.

-Second embodiment configuration-
The first embodiment is characterized by the clearance 3, and the details of the thermal welding between the seal lid main body 21 and the flange portion 14 are not questioned. The configuration of the second embodiment further limits the thermal welding between the seal lid main body 21 and the flange portion 14 in the first embodiment.

  Of the outer periphery of the flange portion 14, the three sides 14 b to d where the extending portion 15 is not extended, and the three sides 21 b to d where the tab portion 22 is not continuous among the outer periphery of the seal lid main body 21, They have the same shape in a substantially plan view, that is, the same shape and size.

  The flange portion 14 and the seal lid main body 21 are heat-welded at least at the outer peripheral matching ranges 14b to d and 21b to d.

  FIG. 3 is a schematic configuration diagram of a container body 1 which is an example of the second embodiment.

  A seal convex portion 16 having a convex section is provided on the upper surface of the flange portion 14 so as to surround the opening 13. When the seal lid main body 21 and the flange portion 14 are heat-welded, the seal convex portion 16 corresponds to the seal convex portion 16. A strong seal is formed.

  A weak seal portion 17 is formed from the annular outer side formed by the seal convex portion 16 to the flange outer circumferences 14a to 14d. For example, the weak seal portion 17 may have a shape in which an adhesive portion and a non-adhesive portion are mixed, such as a knurled shape.

  The strong seal seals the contents, and the weak seal prevents the seal lid main body 21 from dripping from the flange portion outer circumferences 14a to 14d.

  The seal protrusion 16 is preferably close to the opening 13, and is particularly preferably provided at the time of the opening 13.

  The closer the seal convex portion 16 is to the opening portion 13, the greater the distance between the tab portion 22 and the seal convex portion 16, and a larger moment acts when opening from the tab portion 22, so that the seal can be opened with less force. become.

  Further, the closer the seal convex portion 16 is to the opening portion 13, the less the force applied when peeling the strong seal is distributed to the force that bends the flange portion 14, so opening with less force is possible. become able to.

  In the present embodiment, the seal projection 16 is provided at the opening 13.

  FIG. 4 is a diagram for explaining an example of the manufacturing method.

  Generally, a container body and a seal lid are formed in a container forming factory, and are shipped from the container forming factory to a food factory. In the food factory, the contents are filled, the flange portion and the seal lid are thermally welded, and the contents are sealed. In this state, the product is shipped from the food factory to the store.

  On the other hand, in this embodiment, a container main body and a sealing film whose flange portions are slightly larger at the container forming factory are formed and shipped from the container forming factory to the food factory.

  In the food factory, the contents are filled, and the one-larger flange portion and the sealing film are thermally welded, and the contents are sealed.

  Further, at the cut line 41, the sheet film and the flange portion are integrally punched. The unnecessary part 42 is removed. Thereby, the outer periphery three sides 14b-d of the flange part 14 and the three sides 21b-d of the seal lid main body 21 correspond, and it welds accurately and reliably to the coincidence range 14b-d, 21b-d.

  In this state, the product is shipped from the food factory to the store.

~ Opening action ~
This invention solves the said subject and aims at providing a container which is easy to use for all consumers including elderly people. Therefore, general consumers other than the elderly are also targeted.

  FIG. 5 is a diagram for explaining an example of a general consumer opening operation. It may be opened in the same manner as a general conventional container.

  Support both sides of the torso 12 with the left thumb, index finger, and middle finger, hold the left end of the tab portion 22 in the figure with the right hand, and pull it up diagonally in the upper right direction in the figure.

  After the welding on the front left side and the front right side of the flange part is peeled off, the welding on the rear left side and the back right side of the flange part is peeled off.

  The illustration assumes a right-handed hand, but a left-handed hand can also pick and open the right end.

  On the other hand, an elderly person has a generally deteriorated physical function, and the operation of supporting the torso 12 with the belly of the finger or the operation of picking the end of the tab portion 22 may be difficult.

  FIG. 6 is a diagram for explaining an example of an elderly person's opening operation.

  The bottom part 11 is placed on the center of the left palm, and the flange part outer periphery 14b is lightly bited into the thumb ball, and the middle finger and the ring finger are brought into contact with the reverse side of the flange part. This ensures that the container is supported.

  Insert the right thumb into the clearance 3, pick the center of the tab portion 22, and lift it diagonally upward (left and right center) from the front to the back in the figure.

  After the weak seal is peeled off, the strong seal is peeled off by utilizing the moment applied to the seal convex portion 16. As a result, the weld on the front side of the flange portion 14 is peeled off. Subsequently, after the welds on both sides of the flange portion 14 are peeled off, the welds on the back side of the flange portion 14 are peeled off.

  In order to realize the above operation, it is also important to set the container of the present embodiment to an appropriate size. The assumed size is illustrated to assist in understanding the invention.

  The bottom is preferably 30 × 30 to 50 × 50 mm. In addition, the shape (for example, square) without an extreme bias is preferable so that a bottom part may be easily put on a palm.

  A flange width of 5 to 15 mm and a height to the flange of 15 to 30 mm are preferable. The horizontal length of the extended portion is preferably 5 to 15 mm, and the extended height of the extended portion is preferably 2 to 6 mm.

  The distance from the opening 13 to the seal projection is preferably 0 to 5 mm.

  FIG. 7 is a diagram for explaining another operation example.

  The bottom part 11 is placed on the center of the left palm, and the outer periphery 14c of the flange part is lightly bited into the thumb ball, and the middle finger and the ring finger are brought into contact with the reverse side of the flange part. This ensures that the container is supported.

  The middle finger of the right hand is inserted into the clearance 3, the center of the tab portion 22 is picked, and is lifted diagonally upward (front-rear center) from the right side to the left side in the figure.

  After the weak seal is peeled off, the strong seal is peeled off by utilizing the moment applied to the seal convex portion 16. Thereby, the welding of the flange part 14 right side peels off. Subsequently, after the welds on the front and rear sides of the flange portion 14 are peeled off, the welds on the left side of the flange portion 14 are peeled off.

  FIG. 8 is a diagram for explaining another operation example.

  The bottom portion 11 is placed on the center of the left palm, and the outer periphery 14d of the flange portion is lightly bited into the thumb ball, and the middle finger and the ring finger are brought into contact with the reverse side of the flange portion. This ensures that the container is supported.

  The middle finger of the right hand is inserted into the clearance 3, the center of the tab portion 22 is picked, and it is lifted obliquely upward (left and right center) from the far side in the figure to the near side.

  After the weak seal is peeled off, the strong seal is peeled off by utilizing the moment applied to the seal convex portion 16. Thereby, the welding of the flange part 14 back side peels off. Subsequently, after the welds on both sides of the flange portion 14 are peeled off, the welds on the front side of the flange portion 14 are peeled off.

  As described above, the opening method is limited for elderly people.

-Effects of the first and second embodiments-
Compared to the width of the flange three sides 14, the flange width at the flange one side 14 a including the extending portion 15 is clearly wider. Further, the tab portion 22 is provided corresponding to the flange outer peripheral side 14a, so that the tab becomes relatively large.

  Such a clear bias in the shape of the upper surface of the container makes it possible to visually guide opening even for an elderly person whose vision has aged slightly.

  The tab portion 22 is provided corresponding to the seal cover body outer peripheral side 21a (flange portion outer peripheral side 14a). This makes the tabs relatively large and easy to pick. Further, when the tab 22 is picked, a finger is inserted into the clearance 3. Since the extended portion 15 functions as a guide, it is easy to pick.

  On the other hand, the container outer periphery three sides 14b-d and 21b-d are heat-welded and cannot be opened. Moreover, if the bottom part 11 is put on a palm, the opening method will be limited (refer FIGS. 6-8).

  Due to such a clear difference in ease of opening, even an elderly person whose vision has aged can be opened tactilely.

  By the way, the extended portion 15 functions to protect the tab 22 from external damage factors during the transportation of goods. Therefore, even if the tab 22 is relatively large, there is no problem when the product is transported.

  In an example of the second embodiment (FIG. 3), the vicinity of the tab 22 is weakly sealed. Therefore, the weak seal can be peeled off with a relatively weak force.

  On the other hand, the opening 13 is strongly sealed by the seal projection 16. That is, a certain distance is secured between the tab 22 and the strong seal. As a result, a large moment acts. The strong seal can be peeled by utilizing this moment action and the urging force when the weak seal is peeled off. Further, since the position of the strong seal is provided at the opening 13, there is little loss that the force for peeling off the strong seal is dispersed in the force for bending the flange portion 14.

  In this way, the tab 22 can be easily opened even from the center of the flange portion by pinching the center.

  In addition, the sealing performance improves because the portion near the opening 13 is strongly sealed.

~ Array state ~
Although the container of this embodiment may be used individually one by one, when the content is a Western confectionery such as jelly or a Japanese confectionery such as mutton, a plurality of containers are arranged and boxed for gifts. Sometimes used.

  At this time, it is preferable that the containers are arranged without gaps because the containers do not rattle in the box and the box itself becomes compact.

  In addition, when the containers are arranged without gaps, a beautiful appearance in which the contents are tightly packed is formed, and the sense of quality as a gift is improved. In addition, it is possible to add a sense of fun such as forming one image when the containers are gathered.

  However, if the containers are arranged without gaps, there is a problem that it is difficult to take out the containers from the box.

  FIG. 9 is a view for explaining the container arrangement state and the container removal operation of the present embodiment.

  For example, the operation when one container is taken out from a state in which 3 × 3 containers are arranged with almost no gap and packed in a box will be described.

  Focus on the container adjacent to the object to be removed. A clearance 3 is formed under the tab 22. Therefore, when the tab 22 of the adjacent container is pushed from above, the film is bent.

  Thereby, a finger can be hung on the back of the flange 14 of the container to be taken out. Further, the object to be taken out is slightly inclined, and the flange portion is grasped and taken out.

  Thus, the container of this embodiment can be easily taken out even if it is arranged without a gap. Further, even if the size of the extended portion 15 is taken into consideration, the packaging can be sufficiently compact.

-Third embodiment-
In the third embodiment, the shape of the seal convex portion 16 at a position facing the extending portion 15 of the second embodiment is changed. FIG. 10 is a schematic configuration diagram of the flange portion of the present embodiment.

  A portion of the seal convex portion 16 that faces the extended portion 15 protrudes outward, and a shed 18 is formed. Accordingly, a strong seal is formed along a range of the inner peripheral portion of the flange portion 14 that does not correspond to the throat 18, that is, along the seal protrusion 16 and the throat 18 where the throat 18 is not formed.

  An inner weak seal portion 19 (first weak seal) is formed inside the shed 18, that is, on the opening 13 side. As the first weak seal, for example, a shape in which an adhesive portion and a non-adhesive portion are mixed, such as a knurled shape, can be considered. The first weak seal prevents contents from entering a pocket formed at the position corresponding to the mouth.

  A weak seal portion 17 (second weak seal) is formed from the annular outer side formed by the seal convex portion 16 to the flange outer circumferences 14a to 14d. As the second weak seal, for example, a shape in which an adhesive portion and a non-adhesive portion are mixed, such as a knurled shape, can be considered.

  Preferably, the first weak seal and the strong seal are formed at the same time, and then the second weak seal is formed. By forming the first weak seal and the strong seal at the same time, it is possible to reliably prevent the contents from leaking out to the first weak seal portion due to full filling.

  The first weak seal, the strong seal, and the second weak seal are formed as follows. First, a knurled hot plate is prepared at the location corresponding to the first weak seal, and the first lid and the strong seal are heat-sealed by sandwiching the seal lid 2 and the flange portion 14 between the hot plate and the flat seal receiving plate. After that, the second weak seal portion is formed by heat welding in the same manner using a heat plate having a knurled shape at a location corresponding to the second weak seal. Thus, a strong seal and a weak seal can be realized by a simple process.

  Also in the third embodiment, the right thumb is inserted into the clearance 3, the center of the tab portion 22 is picked, and it is lifted obliquely upward (left and right center) from the front side to the back side in the drawing.

  After the second weak seal adjacent to the tab 22 is partially peeled off, the peeling force is distributed in the direction in which the left and right strong seals are peeled off by the shed 18, and the strong seal begins to peel off, and the first weak seal and the second weak seal are Peel off. Subsequently, after the welds on both sides of the flange are peeled off, the welds on the back side of the flange are peeled off.

  In this manner, the center of the tab 22 can be picked by the mouth opening 18 and can be easily opened from the center of the flange portion.

-Fourth embodiment-
The fourth embodiment changes the bottom shape of the first to third embodiments. FIG. 11 is a schematic configuration diagram of a container main body according to the present embodiment. FIG. 12 is another example of this embodiment.

  The fourth embodiment also has the characteristic configuration of the first to third embodiments. Also, the fourth embodiment is common in that it is a rectangular container as in the first to third embodiments. Therefore, the fourth embodiment has the same effect as the first to third embodiments.

  On the other hand, the bottom part of FIG. 11 is substantially circular, and the bottom part of FIG. 12 is substantially hexagonal. As a result, the number of planes forming the body portion 12 increases, and the ridgeline formed by the planes and planes also increases.

  Here, it is assumed that the contents are semi-solid such as jelly or sheep, and the container is turned upside down to put the contents on a plate. In the vicinity of the ridgeline, air easily enters between the container and the contents due to slight container deformation. Thereby, the contents can be easily put on the plate.

-Fifth embodiment-
Although the flange part of 1st-4th embodiment was a rectangle (rectangle), it is not limited to this, Polygons other than a rectangle may be sufficient. FIG. 13 is a schematic configuration diagram of a container body according to the present embodiment.

  The flange part of 5th Embodiment is a hexagon, and a bottom part is an octagon.

  Furthermore, it has an extension part similarly to 1st-4th embodiment. The extended portion is extended so as to be inclined downward from one side of the outer periphery of the flange portion. When the seal lid is heat-welded, the extended portion is at a position corresponding to the tab portion in a substantially plan view.

  The fifth embodiment also has an extending portion that is a characteristic configuration of the first to fourth embodiments. Therefore, the fifth embodiment has the same effect as the first to fourth embodiments.

-Sixth embodiment-
Although the flange part of 1st-5th Embodiment was a polygon containing a rectangle, it is not limited to this, A substantially circular shape and a substantially elliptical shape may be sufficient. FIG. 14 is a schematic configuration diagram of a container main body according to the present embodiment. FIG. 15 is another example of the present embodiment.

  The flange part of FIG. 14 is circular, and a bottom part is an octagon. The flange part of FIG. 15 is circular, and the bottom part is circular.

  Furthermore, it has an extending part similarly to 1st-5th embodiment. The extending portion extends from the part of the outer periphery of the flange portion so as to be inclined downward. When the seal lid is heat-welded, the extended portion is at a position corresponding to the tab portion in a substantially plan view.

  The sixth embodiment also has an extending portion that is a characteristic configuration of the first to fifth embodiments. Therefore, the sixth embodiment has the same effect as the first to fifth embodiments.

DESCRIPTION OF SYMBOLS 1 Container main body 2 Seal lid 3 Clearance 11 Bottom part 12 Body part 13 Opening part 14 Flange part 15 Extension part 16 Seal convex part 17 Weak seal part 18 Mouth 19 Inner weak seal part 21 Seal lid main body 22 Tab part 41 Cut line 42 Unnecessary Part

Claims (6)

A container body having a bottom portion, a trunk portion erected from the outer periphery of the bottom portion, an opening portion formed at an upper end of the trunk portion, and a flange portion extending outward from the opening portion;
A seal lid body that covers the opening and is thermally welded to the flange portion; and a seal lid having a tab portion continuous with the seal lid body.
The container main body has an extending part corresponding to the tab part and extending downwardly from a part of the flange part. The range in which the extended portion of the outer peripheral portion of the flange portion is not extended matches the range in which the tab portion is not continuous in the outer peripheral portion of the seal lid main body,
The container according to claim 1, wherein the flange portion and the seal lid main body are heat-welded at least in a matching range of the outer periphery. The outer peripheral part of the flange part and the outer peripheral part of the seal lid main body are polygonal,
The extending portion is continuous on one side of the polygon of the outer peripheral portion of the flange portion, and the tab portion is continuous on one side of the polygon of the outer peripheral portion of the seal lid body. Item 3. The container according to Item 1 or 2. The container according to any one of claims 1 to 3, wherein a mouth is formed to protrude outward corresponding to the extended portion of the inner peripheral portion of the flange portion. A strong seal portion is provided along a range that does not correspond to the shed of the inner periphery of the shed and the flange portion,
A first weak seal portion, which is weaker than the strong seal portion, is provided in a range corresponding to the shed, inside the strong seal portion,
The container according to claim 4, wherein a second weak seal portion that is weaker than the strong seal portion is provided outside the strong seal portion. Filling the container with the contents through the opening,
Welding the seal lid body and the flange;
The method for manufacturing a container according to claim 2, wherein a range in which the extended portion is not extended in the outer peripheral portion of the flange portion is cut by a predetermined width.