JP5962037B2 - Packaging container - Google Patents

Description

  The present invention relates to a packaging container for packaging a substance having fluidity such as powder, granule, and liquid and transferring the contents to a storage container.

  Powdered or granular foods such as instant coffee are generally sold in a state of being filled in a highly sealed packaging container such as a bottle with a cap so that the sealedness during storage can be maintained. As such a packaging container, Patent Document 1 proposes a packaging container for refilling that allows the contents to be refilled more easily.

  In FIG. 14, the longitudinal cross-sectional view of the conventional packaging container 900 which patent document 1 discloses is shown. The packaging container 900 includes a cylindrical container body 920, a funnel part 930, a seal lid 960, and an overcap 980. The funnel part 930 includes a funnel 931 and a side wall 932 connected to the wide-mouth end of the funnel 931. The side wall 932 is fitted inside the container main body 920 and joined to the inner surface of the container main body 920. The funnel 931 has a shape whose diameter narrows toward the outside of the opening of the container body 920. The container body 920 is filled with the contents 950 and the edge of the open end of the container body 920 is sealed with a seal lid 960. The seal lid 960 is formed with a plurality of perforations (not shown) extending radially from the center. Further, an overcap 980 that covers the top of the seal lid 960 is attached during storage or distribution, and prevents the seal lid 960 from being broken.

  When refilling the contents 950 of the packaging container 900, the overcap 980 is removed from the packaging container 900, and the seal 960 is pushed into the opening of the refilling container while applying the seal lid 960, thereby sealing along the perforation. By breaking the lid 960, the contents 950 can be easily refilled via the funnel 931 formed in the funnel part 930.

JP 2009-262955 A

  In the packaging container 900, by providing the overcap 980, the number of parts increases and the manufacturing cost is high. For this reason, it is desirable to eliminate them, but conventionally, without them, the protection of the seal lid 960 becomes insufficient during storage and distribution, and it has been difficult to prevent the seal lid 960 from being broken.

  Further, from the viewpoint of environmental problems, it is desirable to reduce the amount of plastic and aluminum foil used, and there is a demand for dealumination and paper-making of the container body and funnel parts.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a packaging container lid material that is not easily broken during storage or distribution, and that is compatible with environmental problems, such as reducing the amount of aluminum foil used.

The present invention is a packaging container comprising a container body and a lid material for sealing the container body, the lid material sealing the container body with the peripheral edge sealed to the opening of the container main body. Perforations are radially formed in the removed central part, and the lower film is broken by external pressure, the entire periphery of the peripheral part of the lower film, and the part where the perforations in the central part are not formed in at least one adhesive region is provided, consisting of an upper film that is releasably adhered to the lower film.

  ADVANTAGE OF THE INVENTION According to this invention, the lid | cover material of the packaging container which is hard to be fractured | ruptured at the time of storage or distribution | circulation can be provided.

The perspective view of the packaging container which concerns on the 1st Embodiment of this invention The longitudinal cross-sectional view of the packaging container which concerns on the 1st Embodiment of this invention The top view and sectional drawing of the cover material which concern on the 1st Embodiment of this invention Sectional drawing of the cover material which concerns on the 1st Embodiment of this invention The expanded sectional view of the packaging container which concerns on the 1st Embodiment of this invention The figure which shows the manufacturing method of the packaging container which concerns on the 1st Embodiment of this invention. The perspective view and longitudinal cross-sectional view of the packaging container which concern on the 1st Embodiment of this invention Diagram showing conventional issues The enlarged view of the tab part of the cover material which concerns on the 1st Embodiment of this invention The top view and sectional drawing of the cover material which concern on the 2nd Embodiment of this invention Top view of a lid according to an embodiment of the present invention The top view of the cover material which concerns on the modification of this invention The perspective view of the packaging container which concerns on the modification of this invention, and the top view of a cover material Vertical section of a conventional packaging container

(First embodiment)
The first embodiment of the present invention will be described below. FIG. 1 is a perspective view of a packaging container 100 according to the present embodiment. 2 is a cross-sectional view taken along line AA ′ shown in FIG. The packaging container 100 includes a cylindrical container body 120, a funnel part 130, and a lid member 160. The funnel part 130 includes a funnel 131 and a side wall 132 that is connected to the wide-mouth end of the funnel 131 and surrounds the outer surface of the funnel 131. The side wall 132 is fitted into the container body 120 and joined to the inner surface of the container body 120. The funnel 131 has a shape whose diameter narrows toward the outside of the opening of the container body 120. After the container body 120 is filled with the contents 150 such as powder, the flange portion 121 and the lid member 160 constituting the opening of the container body 120 are sealed, and the container body 120 is sealed.

  3A is a plan view of the lid member 160, and FIG. 3B is a diagram schematically showing a cross section along the line BB ′. In the packaging container 100, the lid member 160 is configured by laminating an upper film 161 that is an outer side and a lower film 162 that is an inner side. The upper film 161 has a layer structure of barrier film (thickness 12 to 100 μm) / easy peel material (thickness 1 to 150 μm) from the outside of the packaging container 100, and the lower film 162 is outside of the packaging container 100. The layer structure of PET (polyethylene terephthalate) (thickness 12 μm) / polyethylene (thickness 30 to 200 μm). As the barrier film, a film having an inorganic oxide vapor deposition film, a metal vapor deposition film, an ethylene-vinyl alcohol copolymer (EVOH), a polyvinyl alcohol (PVA), or the like can be used.

  Alternatively, as shown in the cross-sectional view of FIG. 4, the upper film 161 may further include a PET (thickness: 12 μm) layer on the outer side of the packaging container 100. The lower film 162 may further include a barrier film (thickness: 12 to 100 μm) between the PET layer and the polyethylene layer. In particular, when food is contained as contents, the upper film 161 and the lower film 162 can be printed more safely in terms of food hygiene by laminating a PET layer on which ink is printed on the barrier film layer. It becomes possible.

  On the lower film 162, radial perforations 199 are formed over a predetermined length from the center. That is, the perforation 199 is formed so as not to reach the vicinity of the end of the outer peripheral edge of the lid member 160. The upper film 161 and the lower film 162 are partially sealed in each region sandwiched between the perforations 199, and a plurality of circular adhesive regions 163 are formed. The upper film 161 has a function of protecting the lower film 162 that is easily broken by the perforation 199.

  When the lid 160 seals the container main body 120, the peripheral portion 167 of the lower film 162 and the flange portion 121 of the container main body 120 are heat-sealed, and the peripheral portions of the upper film 161 and the lower film 162 are sealed. 166 are heat sealed at the same time. Further, heat sealing is performed not only on the top surface of the flange portion 121 but also on a region outside the top surface of the flange portion 121 indicated by an arrow in FIG. That is, the outer peripheral part of the peripheral part 167 of the lower film 162 is crimped and heat-sealed in a state along the region outside the top surface of the flange part 121. These heat-sealed portions and the adhesion region 163 are indicated by oblique lines in FIGS. 1 and 3A and indicated by bold lines in FIG. 3B.

  Further, tabs 164 are formed so as to be connected to part of the peripheral portions of the upper film 161 and the lower film 162. The tab 164 is provided so that the upper film 161 and the lower film 162 are bonded to each other in a part of the region 168 including the tip, but other regions that are not bonded cross the tab 164. . The lower film 162 is formed with a cut 165 across the tab 164 in this unbonded region. That is, the lower film 162 is separated by the cut 165, and the tab 164 is connected only by the upper film 161.

  In this embodiment, as an example, the diameter of the lid member 160 is 88 mm, and the perforations 199 are radially formed from the center of the lid member 160 into six straight lines. Also. The perforation length was 1.5 mm, and the perforation joint length was 2 mm. Further, six bonding regions 163 were formed between the perforations 199.

  Here, the refilling procedure will be described. First, the tab 164 is pinched and pulled in a direction in which the lid member 160 is pulled away from the container body 120. FIG. 5 shows an enlarged cross-sectional view in the vicinity of the tab 164 at this time. A cut 165 is formed on the lower film 162. Further, since the lid member 160 is laminated with the lower film 162 via the easy peel material layer of the upper film 161, the flange portion 121 is located in a region between the flange portion 121 and the position where the cut 165 is formed. And the lower film 162 are sealed, but an area where the upper film 161 and the lower film 162 are not sealed is formed. Therefore, the tension is transmitted only through the upper film 161 and is not directly transmitted to the heat-sealed portion between the lower film 162 and the flange portion 121 of the container body 120. That is, the tension is concentrated on the bonding portion between the upper film 161 and the lower film 162 on the flange portion 121. Since the adhesive force between the easy peel material of the upper film 161 and the PET film of the lower film 162 is weaker than the adhesive force due to heat sealing between the polyethylene of the lower film 162 and the flange portion 121 of the container body 120, The upper film 161 is peeled from the lower film 162 by the tension. Next, as in the prior art, the lower film 162 is applied and pushed into the opening of the refill destination container, and the lid 160 is broken along the perforation 199, so that the contents are passed through the funnel 131. Refill.

  The lid member 160 is required to maintain the sealing of the container body 120 even when the container body 120 receives external force and the flange portion 121 is deformed. Since the upper film 161 and the lower film 162 are bonded not only at the peripheral edge portions 166 and 167 but also at the bonding region 163, the flange portion 121 is deformed in the radial direction by dropping or the like, and is horizontally aligned with the surface of the lid member 160. Even if tension is generated, the upper film 161 does not peel from the lower film 162, and the concentration of the tension on the perforation 199 of the lower film 162 is avoided, so that the lower film 162 can be prevented from being broken. Generally, when evaluating the adhesive strength, a peel test is performed by generating a tension in a direction perpendicular to the adhesive surface. However, the adhesive region 163 is required not to be peeled against the tension in the direction horizontal to the surface of the lid member 160. Therefore, it is appropriate to evaluate the adhesive strength of the adhesive region 163 by generating a tension in a direction horizontal to the surface of the lid member 160 and performing a peel test. The adhesive strength of the adhesive region 163 is desirably a strength that does not peel even when a tension of 30 to 70 N is applied in a direction horizontal to the surface of the lid member 160. If the adhesive strength is 30 N or more, it was confirmed that even when the deformation amount of the flange portion 121 of the container main body 120 reaches 25 mm, peeling from the lower film 162 of the upper film 161 and breakage of the lower film 162 can be prevented. . If the adhesive strength is 70 N or more, it is difficult to peel the upper film 161 from the lower film 162 during refilling.

  Moreover, since the peripheral part 166 is heat-sealed, the airtightness of the lid | cover material 160 is ensured by the layer of the barrier film with which the upper film 161 is provided.

  With reference to FIG. 6, the manufacturing method of the cover material 160 and the packaging container 100 is demonstrated. First, as shown in FIG. 6A, a perforation 199 and a cut 165 are formed in a sheet-like lower film material 172 that becomes the lower film 162, and then a sheet-like upper film material 171 that becomes the upper film 161. Are laminated. Thereafter, the bonding region 163 of the upper film material 171 and the lower film material 172 and the region 168 including the portion constituting the tip of the tab 164 are bonded by heat sealing. Next, as shown in (b) of FIG. 6, the upper film material 171 and the lower film material 172 are covered with the laminated upper film material 171 and the lower film material 172, and the upper film material 171, the lower film material 172, The flange part 121 of the container body 120 is heat-sealed. Thereby, the heat seal with respect to the peripheral part 167 of the lower film 162 and the flange part 121 of the container main body 120 and the heat seal of the peripheral part 166 of the upper film 161 and the peripheral part 167 of the lower film 162 are simultaneously performed. Note that the alignment in the heat sealing process is such that the perforation 199 formed in the lower film material 172 is positioned substantially at the center of the opening of the container body 120, and the cut 165 is the flange of the container body 120. It suffices if it is positioned outside the portion 121, and no more highly accurate alignment is required. After that, as shown in FIG. 6C, the upper film material 171 and the lower film material 172 are die-cut into the shape of the lid material 160 so that the lid body 160 seals the container body 120. The container 100 is completed. Furthermore, it is preferable that the outer peripheral portion of the peripheral edge portion 167 of the lower film 162 is heat-sealed to the flange portion 121 in a state where it is crimped along a region outside the top surface of the flange portion 121. In addition, the manufacturing method of the cover material 160 and the packaging container 100 is not limited to the above-mentioned method. For example, various modifications can be made such as changing the order of heat sealing and die cutting.

  As shown in the perspective view of FIG. 7A, heat sealing is performed with the outer peripheral portion of the peripheral edge portion 167 of the lower film 162 being crimped along the outer edge of the flange portion 121. In this case, the shape of the packaging container 100 becomes compact and the aesthetic appearance is improved, and there is no possibility that the lid 160 is peeled off due to contact between the ends of the lid 160 during storage or distribution. In this case, it is preferable to use a polyester material as the easy peel material of the upper film 161. Accordingly, by appropriately setting the heating temperature at the time of the heat sealing process, the lower film 162 and the portion outside the top surface of the flange portion 121 of the container main body 120 adhere to each other in the crease portion. 161 and the lower film 162 can form a region that is not bonded. Thereby, when peeling the upper film 161 from the lower film 162, it can prevent that peeling becomes difficult.

  Further, in the case where the brazing is performed, as shown in the cross-sectional view of FIG. 7B, the radius of the lid member 160 is set to the outer diameter radius of the flange portion 121 and the top curl portion constituting the flange portion 121. It may be larger than the sum of the height. By doing so, even if the upper film 161 and the lower film 162 are pseudo welded at the outer edge portion of the flange portion 121, a region that is not welded to the outer side of the lid member 160 can be provided. Thereby, it can prevent that the cover material 160 tears from an outer peripheral part at the time of opening. It is preferable that the radius of the lid member 160 is increased by about 1 mm to 3 mm from the lower end of the top curl portion of the flange portion 121. Moreover, it is not necessary to enlarge a radius over the perimeter of a cover material. It suffices if the tension from the tab 164 can prevent cracking in a range where the crack of the lid member 160 may progress, and it is sufficient to increase the radius over at least a half circumference of the lid member 160 around the tab 164.

  By the above-described manufacturing method, the heat seal position with respect to the peripheral edge portion 167 of the lower film 162 and the flange portion 121 of the container body 120 and the heat seal position between the upper film 161 and the lower film 162 are highly accurately aligned. Without being performed, they substantially coincide with the surface of the lid member 160 when viewed from the vertical direction. Accordingly, when the tab 164 is pinched and the lid member 160 is pulled away from the container body, the lower film 162 on the center side of the lid body 160 is cut together with the upper film 161 from the cut 165 as shown in FIG. The tension transmitted from the tab 164 without being lifted tends to concentrate on the end portions of the heat sealing position between the upper film 161 and the lower film 162. Further, since the adhesive strength between the easy peel material of the upper film 161 and the lower film 162 is weaker than the adhesive strength between the lower film 162 and the flange portion 121 of the container body 120, the upper film 161 is peeled off from the lower film 162. The lower film 162 is not peeled off from the flange portion 121 of the container body 120. In addition, the adhesive strength here is normal adhesive strength evaluated by generating tension in a direction perpendicular to the bonding surface.

  On the other hand, when the peripheral portion 166 of the upper film 161 and the lower film 162 is bonded in advance, and the heat sealing is performed on the peripheral portion 167 of the lower film 162 and the flange portion 121 of the container body 120, In order to match the heat seal position between the side film 162 and the flange portion 121 and the adhesion position between the upper film 161 and the lower film 162 when viewed from the direction perpendicular to the surface of the lid member 160, a high Accurate alignment is required. When the alignment accuracy is low, as shown in FIG. 8A, the bonding position may protrude outside the heat sealing position. In this case, when the tab 164 is picked up, the lower film 162 is lifted together with the upper film 161, and the tension transmitted from the tab 164 is the end of the adhesion point between the upper film 161 and the lower film 162 that is the peeling start position. It is difficult to concentrate on the part, and it becomes difficult to peel the upper film 161 from the lower film 162.

  In general, there is a similar problem in general packaging containers that use a lid material in which an upper film and a lower film are laminated and peel only the upper film during use. FIG. 8B shows an example of a cross section of the packaging container in which the container main body 1120 is sealed with a lid material 1160 in which an upper film 1161 and a lower film 1162 are laminated. In this example, a release layer 1169 is provided between the upper film 1161 and the lower film 1162. A half cut 1165 is provided on the lower film 1162 side of the tab 1164. In such an example, when the lower film 1162 is sealed to the flange portion 1121 with the half cut 1165 away from the outer edge of the flange portion 1121 by a certain distance or more, the upper film 1161 and the lower film 1162 Are adhered on the entire surface, and when the tab 1164 is picked up, the lower film 1162 is lifted together with the upper film 1161. Therefore, it is difficult for tension to concentrate on the half cut 1165 that is the peeling start position, and it is difficult to peel the upper film 1161 from the lower film 1162. In addition, when the lower film 1162 is sealed to the flange portion 1121 in a state where the half cut 1165 is overlapped with the upper portion of the flange portion 1121, the peeling start position is lost, and even if the tab 1164 is pulled, the upper film 1161 is moved to the lower side. The film 1162 cannot be peeled off. For these reasons, it is necessary to align the half cut 1165 with high accuracy so that the half cut 1165 is positioned outward from the outer edge of the flange portion 1121 of the container body 1120 within a certain distance.

  In the present embodiment, the upper film 161 is easily peeled off without highly accurate alignment between the lid member 160 and the flange portion 121, and the lower film 162 in which the perforation 199 is formed by the upper film 161. Since the strength of the lid member 160 itself can be improved and the number of parts can be reduced, the manufacturing cost can be reduced. As shown in FIG. 9, the tab 164 may be embossed to form a convex portion 170 after sealing the upper film 161 and the lower film 162, so that the tab 164 is made slippery and easy to grip.

(Second Embodiment)
A second embodiment of the present invention will be described. Components that are the same as or correspond to the components of the lid member 160 of the first embodiment are denoted by the same reference numerals. FIG. 10 is a diagram schematically illustrating a plan view of the lid member 260 according to the present embodiment and a cross section taken along the line CC ′. The lid member 260 is an annular shape instead of the adhesive region 163 having a plurality of circular shapes in the lid member 160 according to the first embodiment. Here, the center of the ring coincides with the center of the lid member 260. Further, the tips of the tabs 164 are partially bonded at a plurality of circular bonding regions 169.

  The upper film 161 and the lower film 162 are the same as those in the first embodiment, but may further include a PET (thickness 12 μm) layer on the outer side of the packaging container 100 of the upper film 161. The lower film 162 may further include a barrier film (thickness: 12 to 100 μm) between the PET layer and the polyethylene layer.

  In the present embodiment, as an example, the diameter of the lid member 260 is 86.8 mm, and the length of the perforation 199 is 55 mm. In addition, the ring-shaped adhesion region 163 has an inner diameter of 60 mm and an outer diameter of 66 mm. Moreover, the diameter of the adhesion area | region in the adhesion area | region 169 of the front-end | tip of the tab 164 was 2 mm, and it has arrange | positioned at intervals of 6 mm. In the present embodiment, the tab 164 may be embossed.

  The manufacturing method of the lid member 260 is the same as the manufacturing method of the lid member 160 of the first embodiment.

  Also in the present embodiment, as in the first embodiment, the upper film 161 can be easily peeled off without highly accurate alignment between the lid member 260 and the flange portion 121, and the lid member 260 itself Strength can be improved and the number of parts can be reduced. Moreover, airtightness can be further improved.

  The adhesive strength of the adhesive region 163 is desirably 30 to 70 N in a direction horizontal to the surface of the lid member 260. Since the bonding region 163 is provided over the entire circumference of the ring surrounding the perforation 199, a large bonding strength can be easily obtained in a direction horizontal to the surface of the lid member 260. In particular, when the adhesive strength is 50 to 70 N, peeling from the lower film 162 of the upper film 161 and breakage of the lower film 162 can be prevented even when the atmospheric pressure or the internal pressure of the packaging container 100 fluctuates. It was confirmed that it can withstand air transportation for about 10 hours at an external pressure of 0.8 atm.

  The lid members 160 and 260 in each of the above embodiments do not use ink, varnish, or the like for adhesion, so that no odor is generated. Further, it is made of a transparent film and can be printed with good aesthetics, and can be printed on the upper film 161 or the lower film 162 so as to be transparently visible.

  In each embodiment, when the upper film 161 is peeled from the lower film 162, the perforations 199 are gradually exposed as the peeling progresses. When protecting the sealing lid with a conventional shrink film or overcap, the perforation is instantly exposed by removing the shrink film or overcap. In other words, at high altitudes and high temperatures, the inner pressure of the packaging container is higher than the outer pressure, so that conventionally, the perforation breaks simultaneously with the exposure of the perforations, and the seal lid may burst and the contents may scatter. On the other hand, in this embodiment, since the upper film 161 protects the lower film 162 and the peeling proceeds gradually, the perforation 199 allows air to pass without breaking, and the pressure difference between the inside and outside of the packaging container 100 Is solved. Therefore, the lower film 162 can be prevented from bursting.

  Further, the position and number of the adhesive regions 163, such as the size of the cover materials 160 and 260, the number and length of the perforations 199 of the lower film 162, are not limited to the examples shown in each embodiment, and can be appropriately modified. .

  In the lid member 160, the length of the perforation 199 is preferably 50% to 75% of the diameter of the lid member 160 as shown in FIG. By separating the perforation from the peripheral edge portion of the lid member 160, it is possible to improve the drop impact resistance. Also in the lid member 260, the diameter of the lid member 260 is 50 under the condition that the length of the perforation 199 is away from the inner edge of the annular adhesive region 163 as shown in FIG. % To 75% is preferable. Thereby, it is possible to prevent the lid members 160 and 260 from being broken even when they are dropped during storage or distribution. For example, assuming that the diameter of the cover material is 100 mm and the length of the perforation 199 is 78 mm, the fracture occurred about 10% in the drop test at a height of 60 cm and 45 °, but the length of the perforation 199 is When it was 68 mm, no breakage was observed in the drop test.

  In addition, as a first modification, in the lid member 160, an annular region is provided as an adhesive region 163 in addition to a plurality of circular regions as shown in the plan view of FIG. Adhesive strength may be strengthened. Further, as shown in the plan view of FIG. 12B, a wide portion 191 having a wide width is provided in a part of the annular adhesive region 163, and an inner region surrounded by the annular adhesive region 163 is provided. From the inner periphery of the wide portion 191, the air bleed slit 192 may be formed in the upper film 161 over the inside of the adhesive region 163. The wide portion 191 and the air vent slit 192 are formed in the vicinity of the start side and the end side in the heat sealing process of the bonding region 163. As a result, the air accumulated inside the adhesive region 163 (between the upper film 161 and the lower film 162) through the air vent slit 192 when the film is wound into a roll after heat sealing. By releasing the air, it is possible to prevent the seal from being broken. In addition, by forming the air vent slit 192 in the wide portion 191, even if the positioning accuracy is low, the air vent slit 192 can be prevented from crossing the adhesion region 163, and deterioration of the seal quality can be prevented.

  As a second modification, the tab 164 may be welded to the side wall 132 of the container main body 120 in the lid member 160 as shown in FIG. In this case, in the tab 164, the lower film 162 and the side wall 132 are welded, and at the same time, the upper film 161 and the lower film 162 are welded. As shown in the plan view of FIG. 13B, the welding region of the tab 164 is only the front end side central portion. When the tab 164 is welded to the side wall 132 of the container body 120, when opening is attempted using the tab 164, the resin forming the surface of the side wall 132 is also peeled off together when the tab 164 is peeled off from the side wall 132. Since the traces that have been made remain, it is possible to prevent mischief at stores and the like.

  INDUSTRIAL APPLICABILITY The present invention is useful for a packaging container or the like for transferring a substance having fluidity such as powder, granule, or liquid to another container.

100, 900, 901 Packaging container 120, 920, 1120 Container body 121, 1121 Flange part 130, 930 Funnel part 131, 931 Funnel 132, 932 Side wall 150, 950 Contents 160, 260, 1160 Cover material 161, 1161 Upper film 162 , 1162 Lower film 163, 169 Adhesive region 164, 1164 Tab 165 Cut 166, 167 Peripheral portion 168 Tip end region 170 Convex portion 171 Upper film material 172 Lower film material 191 Wide portion 192 Air vent slit 199 Perforation 960 Seal lid 980 Overcap 1165 Half cut 1169 Release layer

Claims (14)

A packaging container comprising a container body and a lid material for sealing the container body,
The lid material is
The peripheral film is sealed at the opening of the container body to seal the container body, the perforation is formed radially in the central part excluding the peripheral part, and the lower film is broken by external pressure,
And the entire circumference of the peripheral portion of the lower film, in at least one bonding area partially provided in a region where the perforations are not formed in the central portion, the upper is adhered peelable and the lower film A packaging container made of film.   The packaging container according to claim 1, wherein a length of the perforation is 50% to 75% of a diameter of the lid member.   The packaging container according to claim 1, wherein the adhesion region of the lid member includes a plurality of circular regions that are point-symmetric with respect to the center of the perforation.   The packaging container according to claim 1, wherein the adhesion region of the lid member includes an annular region that surrounds the perforation. The annular region has a wide part with a part wider than the other part,
The packaging container according to claim 4, wherein the upper film is formed with an air vent slit that passes through an inner peripheral edge of the wide portion. The lid further has a tab extending from a part of the peripheral edge,
In the tab, the upper film and the lower film are bonded in a part of the region including the tip, and the lower film is cut across the tab in a region other than the part of the tab. The packaging container according to any one of claims 1 to 5.   The said tab is a packaging container in any one of Claims 1-6 in which the convex part is formed by the embossing given to the said upper film and the said lower film.   The packaging container according to claim 6 or 7, wherein the tab is welded to a side wall of the container body. The upper film includes a barrier film / easy peel material layer structure,
The said lower film is a packaging container in any one of Claims 1-8 containing the layer structure of a polyethylene terephthalate / polyethylene.   The packaging container according to claim 9, wherein the easy peel material of the upper film is a polyester resin.   The packaging according to claim 9, wherein the barrier film of the upper film is a film having an inorganic oxide vapor deposition film, a metal vapor deposition film, or a film of ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol (PVA), or the like. container.   The packaging container according to claim 10, wherein the lid member is welded to the opening in a state of being crimped along the outer edge of the opening of the container body.   The packaging container according to claim 12, wherein the lid member includes an area where the upper film and the lower film are not welded outside the area where the opening is welded to the container body. Preparing a lower film having a perforation;
The upper film material is overlaid on the lower film material, and is adhesively laminated with the lower film in a peelable manner in at least one region partially provided in the region of the lower film where the perforation is not formed. Process,
By heat-sealing the opening of the container body and the laminated upper film material and the lower film material, the lower film and the opening of the container body are sealed, and the upper film and And a step of adhering the lower film to a position in contact with the entire circumference of the opening of the container body.

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