JP2015151188A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container that can release gas generated from contents, has high heat insulating performance and strength and can reduce manufacturing costs.SOLUTION: The packaging container comprises: a first trunk part 110 that is cylindrically formed by rounding a first sheet material and overlapping and adhering both side edges thereof; a second trunk part 120 that is cylindrically formed by rounding a second sheet material and overlapping and adhering both side edges thereof and inserted into inside of the first trunk part; and a bottom part 130 and a lid part 140 that respectively seal two opening ends of the second trunk part. A bottom part-side opening end of the first trunk part is folded inward to form a bottom-side inner curl, and a bottom part-side opening end of the second trunk part is folded outward to form a bottom part-side outer curl. The bottom part is adhered to the whole periphery of the bottom part-side outer curl in a peripheral edge part of one surface and adhered to at least part of the bottom part-side inner curl in the other peripheral edge part. At a part leading to an inner wall of the packaging container is provided with a film member 3 having an anti-backflow function capable of exhausting gas to the outside of the container.

Description

  The present invention is a cylindrical packaging container that can efficiently discharge the gas generated from the contents by providing a backflow prevention function on the wall of the packaging container. The present invention relates to a cylindrical packaging container.

Conventionally, when storing contents that are heated in the final process of manufacturing, if sealed and packaged immediately after manufacturing, water vapor accumulates inside the packaging container, condensation occurs, and it adheres to the contents, resulting in an appearance and quality. There was a problem that caused a drop.
In addition, roasted coffee beans and the like have a problem that carbon dioxide gas is generated and the bag is filled and swollen.
Similarly, in the case of fermented foods such as miso and natto, if the yeast is alive, carbon dioxide gas is generated and the internal pressure rises. In addition, steam generated from foods immediately after cooking, especially baked foods such as bread and cookies, and if it stays inside the packaging container, it may become dew and fluff, resulting in gas generated inside the packaging container. There are also problems.

  In order to solve such a problem, Patent Document 1 discloses a packaging with a check valve comprising a packaging bag body made of a plastic film having an opening for accommodating an article, and a check valve installed in the packaging bag body. The check valve has a shorter dimension than the plastic film on one side of a long plastic film, and has a shorter dimension than the filter film having micropores and the long plastic film. The two plastic films are stacked one on top of the other, the left and right sides of each are bonded and closed to provide an upper opening, and the lower portion of the long plastic film and the filter film are bonded and closed horizontally. A gap channel for gas release is formed between the long plastic film and the filtration film, and the upper part of the two short plastic films is filtered. A check piece is formed by the inner plastic film of the two short-sized plastic films so as to protrude longer than the upper part of the film, and the two short-sized plastic films and the filtration film are Adhering laterally in place at the top of the filter film to form an operating pocket for the check piece between the two short plastic films, The filtration surface of the filtration film is formed on the lower side of the lower adhesive portion of the plastic film, and the filtration surface of the filtration film of the check valve is made of silicon as a low-viscosity inert liquid. A check release valve is formed in which a thin film for release having excellent release properties is formed by applying and diffusing oil, etc., and the filter film is inserted into the packaging bag body and the opening is in communication with the outside air. The It is installed in the bag body, and the inside and outside of the packaging bag can be communicated and closed via the filtration surface of the check valve, the gas discharge gap channel, the opening, and the check piece. A packaging bag with a check valve having a filtering surface is proposed.

However, in such a gas-permeable packaging bag type container, since the container body is simply a plastic film packaging bag, there is no heat insulation even if the generated gas such as water vapor or carbon dioxide is discharged outside the container. Difficult to transport, sell. If there is no heat insulation, the temperature of the contents will easily change even if the temperature controlled transportation such as a cold car is subject to temperature changes due to opening and closing of the door, etc. And the capacity changes. When the capacity is deformed, the check valve is also deformed and the function cannot be maintained completely, and there is a problem that oxidation deterioration, fragrance and moisture decrease occur, it is corroded, and freshness etc. are easily lost. .
Also,
On the other hand, in order to improve the heat insulation property, there is a method in which the base material of the container is made of paper and shaped like a cylinder. FIG. 4 is a cross-sectional view showing an example of this, and a base material 13 in which a peripheral edge portion 131 is folded is inserted into a body portion 11 formed by using paper as a main material and rolling a sheet material into a cylindrical shape. Along the inner surface of the body part 11, the peripheral part 131 of the bottom member 13 is folded and welded at the end of the body part 11. The body part 11 is in a state of sandwiching the peripheral part 131 of the bottom material, and similarly, the lid member 14 is also formed by being welded in a form in which the peripheral part is folded and the body part is folded.
However, when the peripheral part of the bottom part is sandwiched between the end parts of the body part, complicated processing is required, so that the cost of the mold or the like is high. In particular, if thick paperboard is used in order to enhance heat insulation, it is difficult to process because the waist is too strong, and it is difficult to cope with the steps at the joints. Therefore, there is a problem that the strength is remarkably reduced when a backflow prevention valve used in Patent Document 1 is sandwiched between them. Furthermore, the backflow prevention valve is conspicuous in appearance, and there is a problem that a high-class feeling cannot be obtained.
In addition, when a backflow prevention valve is attached to a cylindrical container, there is a problem that if the internal volume is reduced due to a decrease in temperature or the like, a large deformation occurs and the appearance is very poor.

In addition to the above, as a method for increasing the strength, there is a method using a spiral paper tube for the body portion. In this case, equipment for supplying the sheet material in a roll is required. Moreover, in order to insert a step of sandwiching the backflow prevention valve in the body portion, the paper base materials overlap in a complicated manner. Therefore, it is not easy to connect the inside and outside of the container with a film member having a backflow prevention function. Therefore, after forming the body part, a large-scale process is performed such that a hole is formed and a backflow prevention valve is attached to the hole, and there is a problem in that there is no productivity.
As described above, in any case, the manufacturing cost is high, and it takes time to start up. And as a cylindrical packaging container, there is a problem that a material whose main material is paper is limited to manufacture in a large lot.

Japanese Patent No. 2691881

  Accordingly, it is an object of the present invention to provide a packaging container that allows gas generated from the contents to escape while having high heat insulating properties, strength, and reduced manufacturing costs.

The packaging container of claim 1 of the present invention is:
A first body part that is formed by rounding the first sheet material, overlapping both side edges, and bonding the overlapping parts into a cylindrical shape;
Round the second sheet material, overlap the side edges with each other, glue the overlapping part into a cylindrical shape, a second barrel inserted into the first barrel,
A bottom portion and a lid portion that respectively seal the two open ends of the second body portion;
The bottom end side curl is formed by folding the open end on the bottom side of the first body portion inward,
A bottom-side outer curl is formed by folding the open end on the bottom side of the second body portion outward;
The bottom part is a packaging container that is bonded to the entire circumference of the bottom side outer curl at a peripheral part of one surface, and is bonded to at least a part of the inner curl of the bottom part at the peripheral part of the other surface,
The packaging container is characterized in that a film member having a backflow preventing function capable of discharging gas is provided outside the container at a part leading to the inner wall.

The packaging container according to claim 2 of the present invention is characterized in that the lid portion is
A ring that fits to the open end of each lid portion of the first body portion and the second body portion and is bonded at least to the entire circumference of the open end of the second body portion on the lid side;
It is a packaging container of Claim 1 which has a seal lid which a peripheral part adhere | attaches to the perimeter of the said ring, and covers the said ring.

In the packaging container according to claim 3 of the present invention, the lid end side inner curl is formed by folding the open end of the first body portion on the lid side inward,
The lid portion side outer curl is formed by folding the open end of the second body portion on the lid portion side outward,
2. The lid portion includes a top surface portion having a peripheral edge portion bonded to at least the entire circumference of the lid portion side outer curl and sandwiched between the lid portion side outer curl and the lid portion side inner curl. This is a packaging container.

  The packaging container of Claim 4 of this invention is a packaging container in any one of Claims 1-3 in which the said top | upper surface part has an opening plan part opened at the time of opening of a packaging container.

  The packaging container according to claim 5 of the present invention is characterized in that the film member having the backflow prevention function is provided by being sandwiched between overlapping portions of the second body portion of the packaging container. The packaging container according to any one of the above.

  The packaging container according to claim 6 of the present invention is characterized in that the film member having the backflow preventing function is provided by being sandwiched between portions where the bottom part of the packaging container and the second body part overlap. 4. The packaging container according to any one of 4 above.

  The packaging container according to claim 7 of the present invention is characterized in that the film member having the backflow prevention function is provided in an overlapping portion between the sealing lid of the packaging container and the ring. It is a packaging container of description.

  The packaging container according to claim 8 of the present invention is the packaging container according to claim 5 or 6, wherein the first body portion is air permeable.

  The packaging container of the present invention has high heat insulating properties and strength that can cope with changes in internal and external air pressure, and escapes gas generated from the contents, so that deformation of the container does not occur and low manufacturing costs can be realized.

It is the longitudinal cross-sectional view and cross-sectional view of the packaging container which concern on the 1st Embodiment of this invention. It is sectional drawing which shows the movement according to the step in embodiment of the prior art which shows an example of the film member which has a backflow prevention function. It is a longitudinal cross-sectional view of the packaging container which changed the attachment position of the film member which has a backflow prevention function with the packaging container which concerns on the 1st Embodiment of this invention. It is an example of the conventional packaging container formed in the cylindrical shape, and is the longitudinal cross-sectional view and a cross-sectional view. It is a chart which shows the manufacturing process of the packaging container which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the filling process of the packaging container which concerns on the 1st Embodiment of this invention. It is the longitudinal cross-sectional view and cross-sectional view of the packaging container which concern on the 2nd Embodiment of this invention. It is the longitudinal cross-sectional view and cross-sectional view of the packaging container which concern on the 3rd Embodiment of this invention.

Hereinafter, the carrying of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1-1 is a view schematically showing a longitudinal section of the packaging container 100 according to the present embodiment, and FIG. 1-2 shows a transverse section. The packaging container 100 includes a first body part 110, a second body part 120, a bottom part 130, and a lid part 140. The second body 120 is inserted into the first body 110. The bottom portion 130 and the lid portion 140 seal the open ends below and above the second body portion 120, respectively. A space surrounded by the second body 120, the bottom 130, and the lid 140 serves as a storage unit 150 that stores the contents.

An open end of the first body 110 on the bottom 130 side is folded inside the first body 110 to form a bottom-side inner curl 111. The open end of the second body 120 on the bottom 130 side is folded outside the second body 120 to form a bottom side outer curl 121. In the example shown in FIG. 1, the bottom side inner curl 111 is formed by winding the open end of the first body portion 110 one or more times. Further, the bottom side outer curl 121 is formed by simply folding without folding the open end of the second body portion 120. The bottom portion 130 is bonded to the entire periphery of the bottom portion side outer curl 121 at the peripheral edge portion of the surface on the accommodating portion 150 side. The bottom 130 is bonded to the bottom side inner curl 111 at the peripheral edge of the other surface. The bottom 130 may be bonded to the entire circumference of the bottom-side inner curl 111 or may be partially bonded. Accordingly, the second body 120 is fixed to the first body 110 so as not to come out of the first body 110, and the peripheral portion of the bottom 130 can be protected by the bottom-side inner curl 111. .
As shown in FIG. 1-2, the second body portion 120 is manufactured by winding a single sheet, and the film member 3 having a backflow prevention function is provided at the joining portion that is overlapped at the start and end of winding. It is sandwiched and fused. However, since the second body portion is inside the first body portion, the state in which the film member having the backflow preventing function is sandwiched cannot be confirmed in appearance and prevents the appearance from deteriorating. .

  The lid 140 has an annular ring 141 and a seal lid 142. The ring 141 is fitted to the open ends of the first body part 110 and the second body part 120 on the lid part side, and fixes the positional relationship between the body parts. The ring 141 includes an outer ring portion 1411 that contacts the outer surface of the first body portion 110 and an inner ring portion 1412 that contacts the inner surface of the second body portion 120. The inner ring portion 1412 may contact the inner surface of the first body portion 110 and the outer surface of the second body portion 120. The ring 141 is adhered to the entire circumference of the open end of the second body 120 on the lid side, and the seal lid 142 is bonded to the entire circumference of the ring 141 to cover the ring 141. Yes. The ring 141 may be further bonded to the open end of the first body 110 on the lid side. The packaging container 100 is opened by peeling the seal lid 142 from the ring 141 or by opening a hole in the seal lid 142. The seal lid 142 may have a tab 143.

  The second body 120, the bottom 130, and the lid 140 are preferably formed of a sheet material having a barrier property. For example, the 2nd trunk | drum 120 can consider the sheet | seat etc. which have the layer structure of PE (polyethylene) / paper / PE / GL (silicon oxide vapor deposition film) / PE from the outer side to the inner side of the packaging container 100. There may not be PE of the outermost layer, and an aluminum foil or the like may be used instead of GL. Moreover, it is preferable that the bottom part 130 is formed with the sheet | seat material which has a barrier property which has a layer structure of PE / paper / PE / GL / PE from the outer side of the packaging container 100 to an inner side. There may not be PE of the outermost layer. Alternatively, the bottom portion 130 may be reinforced by stacking two or more sheet materials. Further, the ring 141 is formed of plastic, for example. For the seal lid 142, for example, a laminate including a resin having a barrier property or an aluminum foil is used. The first body 110 may not use a sheet material having a barrier property. For example, paper can be used as the sheet material. Alternatively, the sheet material may have a layer that can be fused like PE / paper from the outside to the inside of the packaging container 100.

  Thus, the packaging container 100 has a double structure in which the second body 120 sealed by the bottom part 130 and the lid part 140 is housed and protected in the first body 110 and has a hollow part. Furthermore, since the peripheral edge portion of the bottom portion 130 is protected by the bottom side outer curl 121, the shape retaining property, the heat retaining property, and the cold retaining property are excellent. Further, by using a material having a barrier property, the sealing property of the accommodating portion 150 is enhanced, and particularly excellent as a container for food and beverages. In addition, when the packaging container 100 is a container that is heated in a microwave oven, the first body 110 is not extremely heated even if the second body 120 becomes high temperature due to the double structure. High safety. Moreover, since the 1st trunk | drum 110 is protected by the 2nd trunk | drum 120, as long as the content can be accommodated appropriately, paper thinner than the conventional paper container can be used.

FIG. 2 is an embodiment showing an example of a film member having a backflow prevention function.
This example is a film member having a backflow prevention function used when the contents to be stored are powders or granules, and the sectional view of the film body and the movement of the film are shown in the sectional view.
FIG. 2-1 shows a balanced state in which the pressure inside the packaging container and the outside of the packaging container immediately after the contents are stored are the same.
The film member 3 having a backflow preventing function has a filter film 32 that has a short dimension on one side of a long-sized plastic film 31 of the substrate and has fine holes on one side, and a long-sized plastic film 31. The two plastic films 33 and 34 having a shorter dimension are sequentially overlapped, the left and right sides of each are adhered and closed, an opening 36 is provided on the outside of the attachment, and the longer plastic film 31 and the filtering film 32 are provided. A tip seal portion 371 was formed by adhering and closing the inner side of the attachment in the direction perpendicular to it, and a gas discharge gap channel 35 was formed between the long plastic film 31 and the filtration film 32 on the outer side. Then, the opening side of the two short-sized plastic films protrudes longer than the outside of the filter film 32, and a backflow prevention valve is formed by the plastic film on the side of the two short-sized plastic films. Has been established.
The filtration film 32 and the two short plastic films are bonded and closed by the second seal portion at a position that is displaced from the tip seal portion 371 and sufficiently opens a gap.

By the way, when the content is coffee, carbon dioxide gas is generated from the roasted coffee beans and fills the inside of the container, so the whole container swells and thin parts etc. are deformed to the outside Occurs. Similarly, in the case of fermented foods such as miso and natto, carbon dioxide gas is generated when the yeast is alive. In addition, water vapor is also generated from the food immediately after cooking, causing problems due to the gas 5 generated inside the food packaging container, such as condensation and softening.
FIG. 2-2 shows that when the internal pressure of the container is increased by pushing the packaging container from the outside or when the internal pressure of the container is increased by the gas generated from the stored contents, the air and gas 5 are blocked by the silicon oil film 321. Enters the inside of the film member 3 having a backflow preventing function through the filtering film 32, flows through the gas discharge gap channel 35, flows to the opening side of the short plastic film 33, and is discharged to the outside of the container. .

FIG. 2-3 shows a state where the inside of the container is cooled, the internal pressure is lowered, and the pressure outside the packaging container is higher than the inside.
When the external pressure becomes high, external air cannot pass through the gas discharge gap channel 35 closed by the silicon oil film 321, so the external air of the packaging container enters the pocket portion 341, and the gas discharge gap channel The inner short dimension plastic film 33 is pushed in the direction in which 35 closes. And the opening part of the inner side short dimension plastic film 33 closes.
Although there are several backflow prevention valve functions of the film member 3 having a backflow prevention function, the film member 3 opens and closes almost in such a mechanism.

The surface to which the film member 3 having the backflow prevention function is attached is preferably a seal portion where both ends of the second body 120 are rolled up. In addition to the second body portion 120, as shown in FIG. 3, the lid portion 140 (FIG. 3-1) or the bottom portion 130 (FIG. 3-2) may be provided.
When the film member 3 having a backflow prevention function is attached to a place such as the second body 120 or the bottom 140, the gas is discharged to the inside of the first body 110.
Therefore, it is preferable that the first body 110 is made of a material having high gas permeability so that the generated gas permeates out from the first body 110. For example, a method of providing only a paper portion of the base material, providing holes in the front and back coating layers, or coating with a material having high permeability to the internally generated gas can be considered.

The packaging container 100 of the present invention can be manufactured by a highly productive method. FIG. 5 shows a chart of the manufacturing process of the packaging container 100 according to this embodiment, and details are described below.
(Step S1) A rectangular first sheet material is prepared.
The first sheet material is, for example, a sheet material having a layer structure of paper or PE / paper.
The first sheet material is rolled into a cylindrical shape, one side edge and the side edge opposite to each other are overlapped with each other, and the overlapping portion is bonded to form the first body 110.
The first sheet material may have a notch formed by notching at least one location on the bottom 130 side of the corner portion. By forming the notch, the position of the notch becomes a trigger for bending when forming the bottom side curl 111 described later, and the formation becomes easy.
Adhesion can be performed with an adhesive such as a hot melt adhesive, or when a resin such as PE is laminated on both the front and back surfaces of the first sheet material, it can also be performed by thermal welding or ultrasonic welding. .

(Step S2) A rectangular second sheet material is prepared.
The second sheet material is a sheet material having a layer structure including, for example, PE / paper / PE / GL (silicon oxide vapor deposition film) / PE.
One side edge or both side edges of the second sheet material are protected by a skive hemming process, an edge protection tape or the like. A sheet in which an edge protection tape such as a PE tape is attached to the end face of the roll paper may be cut into a rectangular shape to form the second sheet material. Further, in the second sheet material, as in the first sheet material, a notch is formed in at least one of the corner portions on the bottom 130 side, and the bottom side outer curl 121 described later is formed. The formation of the bottom side outer curl 121 may be facilitated by using the position of the notch as a trigger for bending.

(Step S3) The film member 3 having a backflow prevention function is formed.
The film member 3 having a backflow prevention function is formed using a plastic film, a filtration film 32, or the like. Further, the silicon oil may be included in the filtration film 32 after being attached to the second body 120.

(Step S4) The second sheet material is rounded to form the second body 120.
Before the second sheet material is rolled, the film member 3 having a backflow preventing function is attached to one side end to be bonded. Then, the end-protected second sheet material is rolled into a cylindrical shape having an outer diameter smaller than the inner diameter of the first body 110, and one side edge and the opposite side edge are overlapped with each other, and the overlapping portion is bonded. The second body 120 is formed by bonding with an agent, heat welding, or ultrasonic welding. The outer diameter of the second body 120 is formed smaller than the inner diameter of the first body 110.
At this time, the film member 3 having a backflow prevention function attached to one side end of both side ends that are overlapped and bonded to each other is sandwiched, but a pressure is applied so that there is a step and a gap does not appear around. Adjust and paste.

  (Step S <b> 5) Among the open ends of the second body 120, the open end on the bottom 130 side is pressed with a mold while being heated and bent outward to form the bottom-side outer curl 121. The bottom side outer curl 121 is formed by, for example, folding the second sheet material without winding it. In addition to this example of the open end treatment, the bottom side outer curl 121 may improve the strength by forming the curl one or more times. Further, the open end treatment may be formed by crushing the curl so as to form a flange having a flat surface, thereby increasing the degree of adhesion with the bottom 130 and enhancing the protection effect of the bottom 130.

(Step S6) A bottom sheet material is prepared. The bottom sheet material is, for example, paper / PE / GL / P
A sheet material having a layer structure of E. The bottom sheet material is punched in accordance with the outer shape of the bottom side outer curl 121 of the second body 120 to form the bottom portion 130.
When the backflow prevention valve 3 is installed at the bottom portion 130, the backflow prevention valve is attached to the periphery of the bottom sheet material. For attachment, methods such as hot melt adhesive and heat fusion can be employed.

  (Step S <b> 7) The peripheral edge portion of one surface of the bottom portion 130 is bonded to the entire circumference of the bottom side outer curl 121. Adhesion is performed by heat welding or ultrasonic welding.

  (Step S8) A hot melt adhesive is applied to the peripheral edge of the other surface of the bottom portion 130. Thereafter, the second body 120 to which the bottom 130 is bonded is inserted into the first body 110.

(Step S9) A ring 141 is prepared.
A ring 141 is fitted to each open end of the first body part 110 and the second body part 120 on the lid part 140 side. After the ring 141 is fitted to the open end of each barrel portion, the inner ring portion and the entire circumference of the open end of the second barrel portion 120 are bonded together by ultrasonic welding. At this time, the ring 141 and other portions of the body portions may be further bonded. In addition, the enclosure of the content in the accommodating part 150 is performed between this step S9 and the following step S10, for example.

(Step S10) Among the open ends of the first body 110, the open end on the bottom portion 130 side is pressed with a mold while being heated and bent inward, as shown in the longitudinal section of FIG. 111 is formed. The bottom side inner curl 111 is formed by winding a curl one or more times.
However, the shape of the bottom side inner curl 111 is not limited to this, and it may be formed by folding the first sheet material without winding it, and the curl is crushed so as to form a flange shape having a flat surface. It may be formed. Thereafter, in step S8, the peripheral portion of the other surface of the bottom portion 130 to which the hot melt adhesive is applied is pressed and bonded to the bottom side inner curl 111 of the first body portion 110. The bottom 130 may be adhered to the entire circumference of the bottom-side inner curl 111 or may be partially adhered.

FIG. 6 is a cross-sectional view showing the filling of the contents, the manufacture of the lid 140, and the process of sealing the lid to the packaging container manufactured up to step S10.
First, the seal lid 142 is prepared. The seal lid 142 is a film having a barrier property, and includes at least a barrier layer formed of a resin or aluminum foil, and a fusion layer to be fused to the end of the trunk portion of the packaging container.
As shown in FIG. 6A, the outer shape of the seal lid 142 is pulled out.
At this time, as shown in FIG. 6B, a knob 143 protruding at one end of the outer periphery of the seal lid 142 is provided, and the fused seal lid 142 is peeled from the ring 141 to trigger opening of the packaging container 100. It is good to be.
FIG. 6-3 is a packaging container composed of a body part and a bottom part without the sealing lid 142, which is the packaging container shown in the manufacturing process of FIG. The contents are filled here. The contents are attached to the ring 141 so that the fusion is not hindered.
6-4, the lid 140 is aligned with the ring 141. In FIG. 6-5, the peripheral edge of the seal lid 142 is bonded to the top surface of the ring 141 by thermal welding, and the seal lid 142 Cover the hole. Thereby, the cover part 140 is added and manufacture and filling of the packaging container 100 are completed.
When the film member 3 having a backflow prevention function is provided between the lid part 140 and the ring 141, the cover part 140 is attached so as to cover the hole of the ring 141 after the film member 3 having the backflow prevention function is attached to the ring 141. Glue.

  Through the above steps, the packaging container 100 shown in FIG. 1 can be manufactured. Each step may be changed as appropriate or the order may be exchanged.

  Such a manufacturing method eliminates the need for complicated processing of sandwiching the peripheral edge of the bottom portion at the end of the body portion as in the prior art, and eliminates the need to supply a roll because a spiral paper tube is not created. Therefore, the manufacturing cost can be kept lower than before, and packaging containers having various calibers and heights can be provided at low cost even in a small lot.

(Second Embodiment)
FIG. 7 is a view schematically showing a longitudinal section of the packaging container 200 according to the present embodiment. The description will focus on the differences between the present embodiment and the first embodiment. The same reference numerals are assigned to the same components.

The packaging container 200 differs in the cover part 240 from the cover part 140 of the packaging container 100 in 1st embodiment. Further, the lid body side inner curl 112 is formed in the first body part 110 by folding the open end on the cover part 240 side inward.
The second body 120 is formed in a cylindrical shape by fusing both side ends with the film member 3 having a backflow prevention function sandwiched therebetween, and then the lid 140 side open end is folded outward. A part-side outer curl 122 is formed.
The lid portion 240 includes a top surface portion 241 in which the peripheral edge portion of one surface is bonded to the entire circumference of the lid portion side outer curl 122. The peripheral surface of the top surface portion 241 is protected by the lid-side inner curl 112 of the first body portion 110 on the other surface. In the example shown in FIG. 12, the lid-side inner curl 112 is formed by winding the open end of the first body 110 one or more times. The lid-side outer curl 122 is formed by simply folding the lid body-side outer curl 122 without involving the open end of the second body 120.
Here, the first body 110 may be provided with a ruled line that is recessed in a linear shape. After use of the packaging container 200, it can be easily folded and discarded by folding along the ruled line. The ruled line may be a trigger for folding, and the shape is not particularly limited. The ruled line may be formed on the second body 120. In addition, you may provide the same ruled line also in the packaging container 100 of 1st Embodiment.

The top surface portion 241 has a hole, and the spout 4 is inserted into the hole as a planned opening portion that opens at the time of opening, and the flange of the spout 4 is bonded to the top surface portion 241 over the entire circumference. An outer thread is formed on the spout and is screwed with a cap formed with the inner thread. The packaging container 200 is opened by turning the cap and opening it. In addition, the packaging container 200 can be resealed by reattaching the cap after opening.
Of course, a cap in which the cap and the spout are connected by a hinge may be used, or a combination of a spout and a cap that is not a screw type but a stopper type may be used.

  The top surface portion 241 is preferably formed of a sheet material having a barrier property. For example, it is preferable to have a paper / PE / GL / PE layer structure from the outside to the inside of the packaging container 200. The spout 4 is preferably formed of a resin such as PE.

  The lid-side inner curl 112 may be located on the same side as the top surface 241 instead of the opposite side of the lid-side outer curl 122.

The manufacturing method of the packaging container 200 in the second embodiment shown in FIG. 7 will be described below with respect to the difference from the packaging container 100.
In the present embodiment, the ring 141 is not used.
The second body portion is formed by fusing both end portions into a cylindrical shape with the film member 3 having a backflow preventing function interposed therebetween, and then the lid portion 240 side of the open end of the second body portion 120. The opening end that is to be is pressed with a mold while being heated and bent outward to form the lid side outer curl 122. In the present embodiment, the lid-side outer curl 122 is formed by simply diffracting once without involving the second sheet material. The shape of the lid-side outer curl 122 is not limited as in the case of the curls on the bottom side, and may be formed by winding the curl one or more times, and the curl is crushed so as to form a flange shape having a flat surface. May be formed.

  The top sheet material is, for example, a sheet material having a layer configuration of paper / PE / GL / PE. The top sheet material is punched in accordance with the outer shape of the lid-side outer curl 122 of the second body 120. Moreover, the hole of the spout 4 is formed in the top sheet material.

First, a spout 4 is prepared to form the lid. The spout 4 is formed of a thermoplastic resin that can be fused to the inner surface of the lid, such as a linear low-density polyethylene resin or a high-pressure low-density polyethylene resin. As the cap screwed into the spout, for example, PE, polypropylene, olefin resin such as polymethylpentene, acrylonitrile / butadiene / styrene resin, acrylonitrile / styrene resin, and the like can be considered.
The spout 4 is inserted into the hole of the top sheet material, and the flange formed on the spout 4 is bonded to the top surface portion 241 by ultrasonic welding over the entire circumference. Hot melt adhesive or heat fusion may be used.

  The peripheral edge portion of the top surface portion 241 is bonded to the entire circumference of the lid portion side outer curl 122 of the second body portion 120 by heat welding. As described above, the spout 4 is not directly bonded to the second body portion 120 but is bonded to the top surface portion 241, so that the diameter of the spout 242 can be made smaller than the diameter of the second body portion 120. It is possible to facilitate adhesion by welding. In addition, the enclosure of the content in the accommodating part 150 is performed immediately before this process, for example.

Among the open ends of the first body 110, the open end on the lid 240 side is pressed with a mold while being heated and bent inward to form the lid-side inner curl 112. The lid side curl 112 is formed at a position that holds the peripheral edge of the top surface 241. In the present embodiment, the lid-side inner curl 112 is formed by winding the first sheet material one or more times. The shape of the lid-side inner curl 112 is not limited, as is the case with the other curls, and may be formed by simply diffracting the first sheet material so that the flange shape has a flat surface. The curl may be crushed and formed. The top surface portion 241 and the lid portion side curl 112 may or may not be bonded.
Each step may be changed as appropriate or the order may be exchanged.

  The packaging containers 100 and 200 may further include a shrink film, a paper tube, or the like. These cover, for example, portions including the lid portions 140 and 240 and the end portion of the first body portion 110 on the lid portion side, and function as a protective lid that protects the lid portion. The protective cover made of paper is manufactured, for example, by rolling rectangular paper into a cylindrical shape, and hot-melt bonding a top plate to one open end to close the open end.

FIG. 8 shows a longitudinal sectional view of a packaging container 300 according to still another modified example of the present invention.
In the packaging container 100 according to the first embodiment, the packaging container 300 is configured such that the ring 141 is fitted so that the outer ring portion contacts the inner surface of the first body 110, and the peripheral portion of the top surface of the ring 141 A lid-side inner curl 112 is formed at the lid-side open end of the first body 110 so as to hold down, and a seal lid 142 is bonded over the entire top surface of the lid-side inner curl 112. The packaging container 300 can be manufactured by appropriately changing the manufacturing method in each of the above-described embodiments.
As shown in FIG. 8, the opening for pouring out of the lid may also be a hole 144 with a peelable release film 41 attached, instead of the spout used in the packaging container 200. When the seal lid 242 is a paper substrate, the hole 144 needs to be edge protected.

The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the shape, position, and size of each component according to the design of the properties of the contents, the function of the packaging container, the design, etc. It is. For example, the lid portion and the dispensing opening portion may be a large spout formed by injection molding the entire top surface portion, and the base of the spout may have the shape of the ring 141 and can be bonded together.
In addition to such modified examples, various shapes such as a lid, a spout, and a drinking mouth can be implemented.
Further, the material of each component and the bonding method are not limited to those described above, and can be changed as appropriate. The present invention can be applied even when paper is not a main material.

The packaging container of the present invention is as described above, and a cylindrical packaging container that can efficiently discharge gas generated from the contents by sticking the film member 3 having a backflow prevention function to the wall of the packaging container. The second body portion 120 sealed by the bottom portion 130 and the lid portion 140 is housed and protected in the first body portion 110 to form a double structure having a hollow portion. Is protected by the bottom side outer curl 121. For this reason, by using a material having excellent shape retaining property, heat retaining property and cold retaining property and having a barrier property, the sealing property of the accommodating portion 150 is enhanced, and particularly excellent as a container for foods and beverages.
Furthermore, when the packaging container is heated in a microwave oven, the first barrel 110 is not very hot even if the second barrel 120 becomes high temperature due to the double structure. .
Since this packaging container has a double structure, the price of the container rises, but a highly productive manufacturing method is possible, the body is doubled, the strength is high, and it is thinner than the conventional paper container Price increase can be suppressed by using paper.
As described above, the packaging container of the present invention is a container with great merit.

100, 200, 300 ... packaging container 11 ... barrel 110 ... first barrel 111 ... ··········································································· (Gap between the second body)
120... ········ Second barrel 121 ······································································· Side curl 13 ......... Bottom material 130 ......... Bottom 131 ... ... Peripheral edge (bottom Material)
14 ... Lid 140, 240, 340 ... Lid 141 ... Ring 1411 ... ... Outer ring part 1412 that contacts the outer surface ... Inner ring part 142 that contacts the inner surface ... Seal lid 143 ... ···················· Tab 144
150 ································································································ Film member 31 ... Long plastic film 32 ... Filtration film 321 ... Silicone oil film 322 ... Filtering surface 33 ... Inside short plastic film 34 ...・ ・ Outside short dimension plastic film 341 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pocket 35 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Gas discharge gap channel 36 ・ ・ ・ ・ ・ ・···················································· Long film seal 372 Part 4 .............. spout 41 ............. release film 5 .............. gas

Claims (8)

A first body part that is formed by rounding the first sheet material, overlapping both side edges, and bonding the overlapping parts into a cylindrical shape;
Round the second sheet material, overlap the side edges with each other, glue the overlapping part into a cylindrical shape, a second barrel inserted into the first barrel,
A bottom portion and a lid portion that respectively seal the two open ends of the second body portion;
The bottom end side curl is formed by folding the open end on the bottom side of the first body portion inward,
A bottom-side outer curl is formed by folding the open end on the bottom side of the second body portion outward;
The bottom part is a packaging container that is bonded to the entire circumference of the bottom side outer curl at a peripheral part of one surface, and is bonded to at least a part of the inner curl of the bottom part at the peripheral part of the other surface,
A packaging container characterized in that a film member having a backflow preventing function capable of discharging gas is provided outside a container in a part communicating with an inner wall. The lid is
A ring that fits to the open end of each lid portion of the first body portion and the second body portion and is bonded at least to the entire circumference of the open end of the second body portion on the lid side;
The packaging container according to claim 1, further comprising a seal lid that is bonded to the entire circumference of the ring and covers the ring. The inner end curl is formed by folding the open end of the first body portion on the lid side inward,
The lid portion side outer curl is formed by folding the open end of the second body portion on the lid portion side outward,
2. The lid portion includes a top surface portion having a peripheral edge portion bonded to at least the entire circumference of the lid portion side outer curl and sandwiched between the lid portion side outer curl and the lid portion side inner curl. Packaging containers.   The said top | upper surface part is a packaging container in any one of Claims 1-3 which has an opening plan part opened at the time of opening of a packaging container.   The packaging container according to any one of claims 1 to 4, wherein the film member having a backflow prevention function is provided so as to be sandwiched between overlapping portions of the second body portions of the packaging container.   The packaging container according to any one of claims 1 to 4, wherein the film member having a backflow prevention function is provided by being sandwiched between portions where the bottom portion of the packaging container and the second body portion overlap each other.   The packaging container according to any one of claims 1 to 4, wherein the film member having a backflow prevention function is provided in an overlapping portion between a sealing lid of the packaging container and the ring.   The packaging container according to claim 5 or 6, wherein the first body portion has air permeability.

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