JP6772568B2 - Film container - Google Patents

Description

The present invention is a container for food made of a film, which has a self-supporting portion having a folding portion on the bottom surface, and can be cooked in a microwave oven or the like, opened, and eaten as it is as a container. Regarding film containers that can be made.

A self-supporting container made of a film that is self-supporting and uses a small amount of resin, such as a blow bottle, was developed by folding an intermediate film into the bottom side or side surface, and by incorporating a simple mechanism. , Can be produced with a bag making machine.
In particular, a self-supporting container with a folding part on the lower side is highly self-supporting, easy to manufacture, and the contents can be folded compactly before storage, so it is actively used as a package for replacing bottles. It's being used.

By the way, in recent years, it has been proposed to use a film container as a retort pouch and easily cook it in a microwave oven or the like.
Such a film container can be cooked well by heating the food in a state of being stored in the container and releasing the steam generated from the inside when the pressure rises to a certain level. When this film container is used as a retort pouch, the heated film container becomes very hot. In particular, since steam having a temperature of 100 ° C. or higher is ejected from the steam venting portion that allows steam to escape, there is a problem that the surroundings of the steam venting portion are easily burned even if it is handled by hand.

For example, in Patent Document 1, in a bag for heating by a microwave oven, the bottom surface is folded into an inverted V shape and inserted into the bottom surfaces of the front surface and the rear surface formed of a quadrangle constituting the body portion, and the front surface and the rear surface are inserted. The peripheral edge of the bottom surface is heat-sealed to form a top seal portion, a body seal portion, and a bottom seal portion, and the bottom portion can be expanded back and forth by the filled contents to be self-supporting. In a sex packaging bag, a U-shaped seal portion is provided by connecting to the top seal portion or the body seal portion, and a cut or cut is made in the unsealed portion surrounded by the U-shaped seal portion. We are proposing a packaging bag for a microwave oven, which is characterized by having at least one notch.

When this packaging bag for microwave ovens is heated in a microwave oven, the internal pressure rises, and it surely peels off from the U-shaped seal part, and the notch in the unsealed part surrounded by the U-shaped seal part, Alternatively, the vents formed by the notches act as steam vents to maintain a constant internal pressure for cooking.
However, although the temperature around the ventilation holes becomes very high, the film container tends to tilt if only one wide sealing portion is provided. If the vents are not kept in the highest position, the contents may spurt out from the vents, which may cause serious burns and may cause problems such as the surroundings of the container becoming dirty. It was.
Further, in order to open the packaging bag for a microwave oven after cooking, a notch is formed on the edge of the body seal portion and torn through this notch to open the bag. The notch shown in the figure is used. Is written on the upper end side of the bag rather than the U-shaped seal portion. In this case, the opening is narrowed by the U-shaped seal portion to make it difficult to take out the contents, and the contents may leak from the notch due to the notch or the notch.
Therefore, it was necessary to take measures such as transferring the cooked contents to another container after cooking.

Japanese Unexamined Patent Publication No. 2005-59872

Therefore, it is a container that can be safely taken out of the microwave oven and opened after cooking by suppressing the ejection of the contents, and a film container that makes it easy to eat the contents as it is without transferring it to another container after opening. Is an object of the present invention.

The film container of the present invention
It consists of at least a front film, a back film, and a bottom film that folds into the bottom.
It has a seal on the periphery of the left side, right side and bottom.
In a bag-shaped film container having a steam vent on one of the left and right sides,
It has an opening part that is almost parallel to the bottom side on the bottom side of the steam vent part.
And possess a vapor release section below the bottom side of one side surface with a vapor release section, the upper side of the other side, a wide seal portion,
The opening portion is an opening portion having notches on both left and right side surfaces.
The wide seal portions on the left and right side surfaces are film containers characterized in that the seal width is gradually narrowed to the notch position so that the inner edge of the wide seal portion approaches the outer peripheral edge in the vicinity of the notch .

Since the film container of the present invention has wide seal portions on both the bottom surface side of the steam vent portion and the left and right above the side surface opposite to the steam vent portion, the container can be gripped by the wide seal portion so as not to tilt. Therefore, there is no risk that the contents will be ejected from the steam venting portion, and the film container can be safely taken out from a heated microwave oven or the like.
In addition, since it has an opening portion on the bottom surface side that is almost parallel to the bottom surface, it can be opened widely, and the contents can be eaten as it is without being transferred to another container.

It is an example of the film container of the present invention, and is the perspective view which shows the shape before filling. It is an example of the film container of this invention, and is the perspective view which shows the state which the contents are filled and sealed, and then heated in the microwave oven. It is an example of the film container of the present invention, and is the perspective view which shows the state which the container was torn and opened from the notches on the left and right side surfaces.

Hereinafter, an example of an embodiment of the film container of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an example of a film container of the present invention, and is a perspective view showing a shape before filling the contents.
The film container is composed of a front film 1, a back film 2 on the back side thereof, and a bottom film 3 folded into the bottom surface.
The front film 1 and the back film 2 have a shape in which the upper side is wide and the lower side is narrow.

The front surface film 1 and the back surface film 2 are fused with each other on the left side sealing portion 61 and the right side sealing portion 62.
Further, on the bottom side, there is a bottom film 3 folded in the front and back directions, and the front film 1 and the bottom film 3 are attached to each other, such as the left side seal portion 61, the right side seal portion 62, and the front bottom seal portion 31. It is sealed at the periphery of the surface to form a bottom surface shape.
Similarly, the back surface film 2 and the bottom surface film 3 are sealed to each other by peripheral portions such as the left side surface sealing portion 61, the right side surface sealing portion 62, and the back bottom surface sealing portion 32 to form a bottom surface shape. When the center of the folded bottom film 3 is widened, the front film 1 and the back film 2 near the bottom surface are separated to form the bottom surface 30.

At this time, a part of the bottom film 3 is opened in the left peripheral edge and the right peripheral edge of the bottom film 3, and the lower left fusion portion 610 and the lower right fusion portion 620 in which the front film 1 and the back film 2 are fused to each other. Is provided. Therefore, the waist of the bottom peripheral edge is strengthened, and stable independence can be ensured.

A steam venting portion 5 is provided on one of the left and right side surface sealing portions.
The steam venting portion 5 forms a fused portion protruding inside the film container. Then, the fusion width at the tip thereof is reduced, and the fusion outer edge portion 51 is set to be located inside the inner edge position of the other fusion portions.

Further, at both ends of the outer peripheral edge of the left side surface sealing portion 61 and the right side surface sealing portion 62, the left notch 71 and the right notch 72 are provided on the bottom surface side of the steam venting portion 5 and parallel to the bottom surface.
If the fragile line 73 runs in a straight line connecting the left notch 71 and the right notch 72, it is easier to open the film container more reliably.
The fragile line 73 can be dealt with by scanning a carbon dioxide laser to partially weaken the base film or by cutting the base film in half with a big blade or the like to make it easier to tear.

Further, the left side sealing portion 61 on the upper surface side of the left notch 71 has an upper wide sealing portion 611, and the right side sealing portion 62 on the upper surface side of the right notch 72 has an upper sealing portion 621. ..
Further, a lower wide seal portion 622 is also formed on the bottom surface side of the notch of the side seal portion having the steam vent portion 5.

In FIG. 1, the upper surface side of the film container is not sealed and is opened. Normally, the contents are filled through the opening 4 and then the upper surface sealing portion 63 is fused to form a film. Complete the container making.
At this time, it is necessary to limit the content to an amount that can be filled only on the bottom surface side of the steam venting portion 5.

FIG. 2 is an example of a film container of the present invention, and is a perspective view showing a state in which the contents are filled and sealed and then heated in a microwave oven.
When heated in a microwave oven, the moisture in the contents boils and the pressure inside the film container rises.
When the pressure inside the film container rises, the film container tends to inflate into a round, nearly spherical shape.
At this time, in the vicinity of the left notch 71 of the left side seal portion 61 and the vicinity of the right notch 72 of the right side seal portion 62, the unsealed portions on the left and right sides, which are the storage portions inside the side seal portion, are bulged outward. It has become. Therefore, the inside of the side seal portion near the notch, which is a fragile portion, does not peel off.

That is, the peeling of the fused portion that occurs when the film container is heated gradually starts from the inside of the sealing portion that opposes the spherical shape from the center of the container. Therefore, it starts to peel off from the inside of the steam venting portion 5 which is fused in a state of protruding to the center.
In the film container of the present invention, in particular, the fused outer edge portion 51 of the steam venting portion 5 is set to be located inside the inner edge position of the other fused portions, so that the tip of the steam venting portion 5 is located. However, it penetrates the outside of the container first in the container.

In the seal portion on the periphery of the container, the steam venting peeling portion 50 that was peeled off first peels off to the outside of the fusion outer edge portion 51 according to the internal pressure, and the steam venting portion 5 to the steam 8 inside the container, etc. The boiling steam of is ejected.
At this time, since the contents are filled only on the bottom surface side of the steam venting portion 5, if the film container is made independent, only the steam of the contents is ejected and the ejection of liquid or the like can be suppressed.
If the contents come inside the steam venting portion 5, the liquid contents themselves may spurt out and cause burns, so it is necessary to prevent the container from tilting.

Since the wide seal portions such as the upper wide seal portion 611 and the lower wide seal portion 622 are separated from the storage portion, even if the film container is heated, the temperature does not rise and it is easy to hold.
Further, since the high-temperature steam flows upward, the upper seal portion 621 becomes hot, but the lower wide seal portion 622 on the steam vent side does not become hot.
Therefore, when the heated film container is taken out from the microwave oven, the container can be taken out by holding the wide seal portion.
At this time, there are a lower wide seal part 611 on the steam vent side, an upper wide seal part 622 on the opposite side of the steam vent, and wide seals on the left and right, so if you grab the left and right wide seals at the same time and lift , It is possible to hold the bottom surface horizontally without tilting the container. In a state where steam is generated by heating, if the steam venting portion 5 is lower than the liquid level of the contents, the contents may be ejected at once.

When the steam inside the film container is completely released, the air pressure inside becomes the same as the outside air pressure, and the film container deflates. Then, the back film can be torn and opened between the left notch 71 and the right notch 72 parallel to the bottom surface with the one notch as a base point. If the fragile line 73 seems to be processed, the rupture line to be torn does not shift, and it is easy to break along the fragile line.

FIG. 3 is a perspective view of a film container in which the opening portion 70 is torn from the left notch 71 to the right notch 72 as described above.
Since the film container of the present invention in which the opening portion 70 is torn does not have a steam venting portion inside the opening portion 70, it has a large opening and does not have a blocking shape. Further, in the vicinity of the opened portion 70, the storage portion, which is an unsealed portion, has a shape that bulges outward, so that the tip is the most widened like a bowl. Therefore, the shape is very easy to take out the contents.
In particular, the lower left fusion portion 610 and the lower right fusion portion 620 make it easier to secure a strong waist at the bottom peripheral edge and secure stable independence.
Further, even after opening, there is a lower wide seal portion 622 on the side surface where the steam vent portion was located, so if the lower wide seal portion 622 is grasped, the holding hand does not get hot and the contents can be easily taken out.

The front film and the back film used in the film container of the present invention include a base film having at least a certain waist and a highly adhesive sealant film, and a film that can be torn from the notch is used.
In addition, it must be suitable for retort pouching and can maintain its shape without being melted by heating in a microwave oven. In particular, it is necessary to have rigidity that can maintain an independent state even at high temperatures in a microwave oven.

For example, it is a configuration example of polyethylene terephthalate stretched from the outside, polyethylene, a barrier film, and a sealant layer.
As the barrier film, a stretched polyamide film in which a metal oxide such as silicon oxide or aluminum oxide is metal-deposited can be considered, and a film in which a pure metal such as aluminum is vapor-deposited or a metal foil generates heat at a high temperature in a microwave oven. do not use.
Polyamide film is used because it is hard to break, has high impact resistance, and has high flexibility.
As the sealant, linear low-density polyethylene having high fusion strength and heat resistance is preferable.
These films can be produced by laminating them with a normal dry lamination machine, extruder laminating machine, or the like.

In addition, between the left and right notches of the opened part, laser irradiation processing is performed using laser light such as YAG laser, which is a solid-state laser using yttrium aluminum garnet, to weaken it and make it more linear. It may be easy to tear.
Further, a film having a stronger stretching of the base material in the left-right direction of the film container may be used.

The film used for the bottom film may be composed of a front film or a back film. However, there is no need to emboss or half-cut, so
Biaxially stretched polyethylene terephthalate / polyethylene,
Biaxially stretched polyamide / polyethylene / inorganic oxide vapor-deposited polyethylene terephthalate / polyethylene,
Biaxially stretched polyethylene terephthalate / polyethylene / ethylene vinyl acetate copolymer saponified product / polyethylene,
Biaxially stretched polyethylene terephthalate / polyethylene / adhesive resin / polyamide / adhesive resin / polyethylene,
Biaxially stretched polypropylene / polyamide / adhesive resin // polyethylene,
A general configuration such as is conceivable.
These films can also be produced by laminating them with a normal dry lamination machine, extruder laminating machine, or the like.

The film container of the present invention is as described above, and is left and right of the lower wide seal portion on the bottom side of the steam vent portion on which the steam ejected from the steam vent portion is not applied and the upper wide seal portion on the other upper side. Since it has a wide seal portion, the film container can be taken out from a microwave oven or the like that has been safely heated so as not to tilt.
In addition, since it has an opening on the bottom side that is almost parallel to the bottom, it can be opened wide, and you can eat the cooked contents while it is hot without having to move it to another container. It is an easy-to-use film container.
Further, since it can be manufactured using a conventional manufacturing line, it can be manufactured without particularly incurring equipment costs, and the merit of the present invention is great.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Front film 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ Back film 3 ・ ・ ・ ・ ・ ・ ・ ・ Bottom film 30 ・ ・ ・ ・ ・ ・ ・ ・ Bottom 31 ・ ・ ・Front bottom seal 32 ... Back bottom seal 4 ... Opening 5 ... Steam vent 50 ...・ ・ ・ ・ ・ ・ Steam venting peeling part 51 ・ ・ ・ ・ ・ ・ ・ ・ Fusion outer edge part 61 ・ ・ ・ ・ ・ ・ ・ ・ Left side seal part 610 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower left fusion part 611 ・・ ・ ・ ・ ・ ・ Upper wide seal part 62 ・ ・ ・ ・ ・ ・ ・ ・ Right side seal part 620 ・ ・ ・ ・ ・ ・ ・ ・ Lower right fusion part 621 ・ ・ ・ ・ ・ ・ ・ Upper seal part 622 ・ ・・ ・ ・ ・ ・ Lower wide seal part 63 ・ ・ ・ ・ ・ ・ ・ ・ Top surface seal part 70 ・ ・ ・ ・ ・ ・ ・ ・ Opening part 71 ・ ・ ・ ・ ・ ・ ・ ・ Left notch 72 ・ ・ ・ ・ ・ ・・ ・ Right notch 73 ・ ・ ・ ・ ・ ・ ・ ・ Vulnerable line 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ Steam

Claims (3)

It consists of at least a front film, a back film, and a bottom film that folds into the bottom.
It has a seal on the periphery of the left side, right side and bottom.
In a bag-shaped film container having a steam vent on one of the left and right sides,
It has an opening part on the bottom side of the steam vent that is almost parallel to the bottom.
And possess a vapor release section below the bottom side of one side surface with a vapor release section, the upper side of the other side, a wide seal portion,
The opening portion is an opening portion having notches on both left and right side surfaces.
The wide seal portion on both the left and right side surfaces is a film container characterized in that the seal width is gradually narrowed to the notch position so that the inner edge of the wide seal portion approaches the outer peripheral edge in the vicinity of the notch . The film container according to claim 1, wherein the unsealed portions on the left and right side surfaces of the storage portion have a shape that bulges outward in the vicinity of the opened portion. The first or second claim is characterized in that the bottom surface film has holes on the left and right sides of the bottom surface seal portion, and the front surface film and the back surface film are fused at the fusion zone. The film container described.

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