JP2564461B2 - Rice ball packaging material for separating seaweed and method for opening the same - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] The idea is to make the onigiri and the seaweed that have been isolated and packaged come into direct contact with one-touch, so that anyone can easily wrap the rice ball with the nori and eat it. Regarding the method.

[0002]

2. Description of the Related Art In recent years, rice balls are wrapped in seaweed and sold at convenience stores, supermarkets and the like due to changes in lifestyle.

However, if the rice ball is directly wrapped with seaweed at the time of gripping the rice ball, the seaweed will be immediately moistened, and the aroma and flavor will be impaired when purchased and eaten.

Therefore, the scent and flavor of seaweed are not impaired,
It is generally hygienic and storable, and it is a common practice to separate the seaweed and the rice ball so that the rice ball wrapped with the seaweed can be eaten in a dry state that feels good anytime, anywhere.

Various kinds of rice ball packaging materials for separating seaweed have been used, for example, Japanese Utility Model Publication No. 63-40152, Japanese Patent Publication No. 63-307064 and Japanese Patent Publication No. 4-20252. Etc.

[0006]

The conventional rice ball wrapping material for separating seaweed and the method for opening the seaweed have a high manufacturing cost and cannot be opened easily. If the rice ball is not directly handled, it will be wrapped in seaweed. There were many things that did not exist.

[0007] The hands are not always clean outdoors, and if you grab this kind of rice ball with your hands, which is often eaten outdoors, the rice grains will stick to your hands and you will eat the rice grains, which is not hygienic. There was a flaw.

In Japanese Utility Model Publication No. 63-40152, a perforation is provided substantially in the center of the exterior film, and seaweed is placed in a bag-shaped storage portion formed by the exterior film and a pair of isolation films. The rice balls placed on the are packed in a triangular shape.

When eating, the packaging film wrapped in a triangular shape is opened, the exterior film is cut off at the perforations, and the packaging film can be removed while leaving seaweed and rice balls together with the isolation film. is there.

However, in this publication, since the perforations are provided in the approximate center of the exterior film, there is a drawback that the perforations may be broken when the packed rice ball is handled by hand. In addition, the seaweed stored in the bag-shaped storage portion formed by the exterior film and the pair of isolation films may come into contact with the outside air through the perforations, so that the seaweed has a fatal drawback.
And when eating, since the isolation film is sealed over the entire circumference of the exterior film, the seaweed sandwiched between the exterior film and the isolation film is hard to come off,
There was a drawback that the seaweed broke.

Further, Japanese Unexamined Patent Publication No. Sho 63-307064 comprises an outer wrapping material and an inner wrapping material. The inner wrapping material is superposed on the outer wrapping material from both ends of the outer wrapping material to the central portion and overlaps each other at the central portion. The present invention relates to a packaging material for rice balls, which is composed of. In addition, a breaking portion is provided at the center of the outer packaging material.

When eating, the rice ball with seaweed or the like can be eaten by simply breaking the fractured portion at the center of the outer packaging material and pushing out the rice ball.

[0013] However, in this publication, after breaking the breaking portion, the rice ball with seaweed is extruded from the packaging material and eaten, or is picked up from the packaging material and eaten.
There was a problem that it was not possible to eat with one touch just by breaking the broken part.

In addition, since the seaweed is cut into the shape of a turtle shell cut off at the four corners of the rectangle, there is the problem that it takes time to cut the seaweed. Moreover, since the turtle shell-shaped seaweed is stored by heat-sealing the four corners in a diamond shape between the outer and inner packaging materials, it is difficult to pull out the seaweed from between the outer and inner packaging materials and the seaweed breaks. There was a drawback to do.

Further, Japanese Patent Laid-Open No. 4-20252 discloses that
Nori seaweed is placed on a piece of synthetic resin film, and both sides of this film are bent inwardly in an envelope shape to form a non-adhesive polymerized portion at the center. Since the peripheral portion is sealed except for this overlapping portion, there is a problem that it is not easy to store the seaweed. In addition, when eating, the sheet-shaped seaweed intervenes in the packaging material for rice balls that is folded in a triangular shape, so it is difficult for sheet-like seaweed to come out between the synthetic resin film and the bent pieces, and the seaweed is broken. There was a big drawback.

According to the present invention, the front film is removed together with the back film which isolates the rice ball and the seaweed, and the rice ball and the seaweed are in direct contact with each other, so that the rice ball can be wrapped in the seaweed with one-touch and eaten. The purpose is to provide a method. Specifically, the direction of easy tearing of the front and back films of the directional synthetic resin is aligned in the vertical direction in the vertical direction or in the horizontal direction in the horizontal direction, and two back films are partly overlapped and polymerized with seaweed on the top and bottom of the front film. Then, the four corners of the front film are sealed with the upper and lower back films to form a packaging material. Next, cuts are made in the center of the upper and lower ends of the polymerized front and back films in this packaging material, or in the center of the left and right ends of the upper and lower back films that are polymerized with the front film. When packing rice balls, place a triangular rice ball on top of the upper and lower films and fold the lower and upper films together. Then, the front and back films with the corners on both sides of the rice ball sealed are folded over the rice ball, wrapped in a triangular shape, and sealed with adhesive tape or the like. In addition, when eating, pull the packaging material on the top of the rice ball left or right or pull the left and right edges of the packaging material up and down to make a notch at the top or bottom of the front and back films or the center of the left and right ends of each back film. Cleave vertically or horizontally from the notch reaching the front film provided in the section. In this way, the packaging material can be separated and removed from the rice ball and the seaweed, and the rice ball and the seaweed can be directly contacted, and the rice ball packaging material for separating seaweed and the opening method can be opened so that the rice ball can be wrapped with the seaweed and eaten with one touch. The purpose is to do.

[0017]

[Means for Solving the Problems] In order to achieve this object, as a rice ball wrapping material for separating seaweed, a directional synthetic resin front film and two backs similar to the front film, which are slightly larger than half of the front film, are used. The film is provided with the easy tearing direction being the vertical direction.

[0018] A part of these two backside films is overlapped, and nori seaweed is inserted between the front and back films above and below the front film to polymerize, and the front film and the top and bottom backing films are fixed to the four corners of the front film. Provide a seal to

A notch is provided at the center of the upper and lower ends of these polymerized front and back films, a triangular rice ball is placed so that the top is located at the center of the upper and lower films, and the lower and back films are folded over the rice balls together with the front and back films. Next, the front and back films with the upper corners of both sides of the rice ball sealed were folded over the rice ball, wrapped in a triangular shape, and sealed with an adhesive tape or the like.

As another rice ball wrapping material for separating seaweed, a directional synthetic resin front film and two back films similar to the front film, which are slightly larger than a half of the front film, are left and right in the lateral direction. Set in the direction.

Part of these two backside films are overlapped with each other, and seaweed 3 is inserted between the front and back films above and below the front film to polymerize them, and the front film and the top and bottom back films are formed at the four corners of the front film. Provide a seal to fix the.

A notch reaching the front film is provided at the center of the left and right edges of the upper and lower back films of these polymerized front and back films, and a triangular rice ball is placed so that the top is at the center of the upper and back films, and the lower back film is placed. Fold the above together with the front film onto the rice ball. Next, the front and back films with the upper corners of both sides of the rice ball sealed were folded over the rice ball, wrapped in a triangular shape, and sealed with an adhesive tape or the like.

As a method for opening the rice ball wrapping material for separating seaweed, a directional synthetic resin front film and two back films similar to the front film, which are slightly larger than half of the front film, can be easily torn in the vertical direction in the vertical direction. To

Then, a part of the two back films is overlapped and superposed on the top and bottom of the front film, seaweed is inserted between the front and back films, and seals for fixing the top and bottom back films are provided at the four corners of the front film.

A notch is made at the center of the upper and lower ends of these front and back films, a triangular rice ball is placed so that the top is located at the center of the upper and lower films, and the lower and back films are folded over together with the front films.

Then, the front and back films having the upper corners on both sides of the rice ball sealed are folded on the rice ball and packaged in a triangular shape and sealed with an adhesive tape or the like to form a packaging material.

The adhesive tape or the like is peeled off from the packaging material, the corners are sealed, and the front and back films folded on top of the rice ball are extended.

Then, the upper and lower ends of the front and back films are pulled to the left and right, and are vertically cut at a notch provided at the center of the upper and lower ends of the front and back films, thereby removing the back film separating the rice ball and seaweed together with the front films. .

By doing so, the seaweed and the rice ball were brought into direct contact with each other, and the rice ball was wrapped with the seaweed with one touch so that it could be eaten.

As another method for opening the rice ball wrapping material for separating seaweed, a directional synthetic resin front film and two back films similar to the front film, which are slightly larger than half of the front film, are placed in the easy tear direction. Set to the left / right direction.

A part of these two back films is overlapped and superposed on the top and bottom of the front film, seaweed is inserted between these front and back films, and seals for fixing the top and bottom back films are provided at the four corners of the front film.

A notch reaching the front film is made at the center of the left and right ends of the upper and lower back films which are superposed on and under the front film.

Then, a triangle-shaped rice ball is placed so that the top is located in the center of the upper back film, the lower back film is folded together with the front film onto the onigiri, and the front and back films with the upper corners on both sides of the rice ball are sealed. Fold in,
Wrap in a triangular shape and seal with adhesive tape to make a packaging material.

The adhesive tape or the like is peeled off from the packaging material, the corners are sealed, and the front and back films folded on the rice ball are extended.

Then, by pulling the left or right ends of the front and back films up and down, the back films separating the rice balls and seaweed are horizontally cut at the notches provided at the central portions of the left and right ends of the top and bottom films, respectively. Remove with.

By doing so, the seaweed and the rice ball were brought into direct contact with each other, and the rice ball was wrapped with the seaweed with one touch so that it could be eaten.

[0037]

[Function] A directional synthetic resin film is used for the front and back films 1, 2 and 2a so that the easy tearing direction is the vertical direction in the vertical direction or the horizontal direction in the horizontal direction, and the two back films 2, 2a are partially overlapped. Together, the seaweed 3 is inserted between the front and back films 1, 2 and 2a above and below the front film 1 to polymerize. Then, seals 4 for fixing the front film 1 and the upper and lower back films 2, 2a are provided at the four corners of the front film 1.

Then, the notches 5 and 5 are provided in the central portions of the upper and lower ends of the front and back films 1, 2 and 2a. Alternatively, notches 5a, 5a reaching the front film 1 are provided at the central portions of the left and right ends of the upper and lower back films 2, 2a.

Next, the triangle-shaped onigiri 6 is placed in the center of the upper back film 2 and the lower back film 2a is folded over the onigiri 6, and the upper corners of both sides of the onigiri 6 are sealed. Fold the front and back films 1, 2 and 2a onto the rice ball 6.

In this way, the rice balls 6 are wrapped in a triangular shape, and the rice balls 6 in which the front and back films 1, 2 and 2a are folded are formed.
The upper corners of both sides are sealed with adhesive tape 7 or the like. Then, the notches 5 and 5 provided at the central portions of the upper and lower ends of the front and back films gather on the top of the rice ball 6.

Or, a notch 5 reaching the front film 1 provided at the center of the left and right ends of the upper and lower back films 2, 2a.
a and 5a gather at the center of both sides of the rice ball 6.

When eating, the adhesive tape 7 or the like in FIG. 6 is peeled off, and the folded front and back films 1, 2 and 2a at the upper corners on both sides of the folded rice ball 6 are shown in FIG. 5 (A).
As shown in FIG. 2, the upper and lower sides of the front and back films 1, 2 and 2a are pulled left and right in the arrow direction. Then, the front and back films 1, 2 and 2a are vertically torn from the cuts 5 gathered at the one place, and the front film 1 is removed from the onigiri and the seaweed together with the back films 2 and 2a which isolate the rice ball 6 and the seaweed 3. Easily bring the rice ball and nori directly into contact.

Alternatively, as shown in FIG. 5B, when either of the both ends of the front and back films 1, 2, 2a is pulled up and down in the direction of the arrow, the notches 5a, 5a gathered at the central parts of both sides of the rice ball 6 are formed. Torn laterally and easily contact the rice ball and seaweed directly.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rice ball packaging material for separating seaweed and a method for opening the same according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a view showing the front and back films of the rice ball wrapping material for separating seaweed of the present invention, which are superposed on each other.
Shows the seaweed inserted between the front and back films, and FIG. 3 shows the front and back films of FIG. 2 with the four corners sealed. FIG. 4, FIG. 5 (A), (B) and FIG. 6 show a procedure for wrapping a rice ball with a packaging material having the seaweed inserted therein. Of these, FIG. 4, FIG. 5 (A) and FIG. 6 are those of Example 1 in which the easy tear direction is the vertical vertical direction, and FIG. 5 (B) is the embodiment in which the easy tear direction is the horizontal lateral direction. Example 2
belongs to. FIG. 7 shows the unwrapped rice balls and seaweed of Example 1 when opened, and FIG. 8 shows the rice balls wrapped with seaweed of Examples 1 and 2.

Example 1 In this example, a directional synthetic resin film was used with the easy tearing direction being the vertical direction, and the front film 1 was used.
Can be easily torn in the longitudinal direction.

The upper and lower back films 2 and 2a are directional synthetic resin films similar to the front film 1 and are used with the easy tearing direction being the vertical direction in the vertical direction, and have the same width as the front film 1. The vertical direction is slightly larger than half of the front film 1.

The seaweed 3 is pre-cut to a size capable of wrapping the rice ball 6 which will be described later, and when the upper and lower back films 2 and 2a are partially superposed on the upper and lower sides of the front film 1 to be polymerized,
As is well known, the front and back films 1, 2 and 2a are mechanically inserted and accommodated.

The seals 4 such as heat seals are provided at the four corners of the superposed front and back films 1, 2 and 2a. The front film 1 and the upper and lower back films 2 and 2a.
Is to fix.

The notches 5 and 5 are the front and back films 1, 2 and 2, respectively.
The front and back films 1, 2 and 2a are torn in the vertical direction to form a fractured portion.

The triangle-shaped rice ball 6 is one in which the top is placed at the upper center of the upper back film 2 as shown in FIG. 4, for example.

Of course, the triangular rice ball 6 may be placed with its apex located in the lower center of the lower back film 2a.

In assembling the packaging material of this embodiment, the front film 1 is mechanically arranged as shown in FIG.
Part of 2a is superposed in the middle and polymerized on the upper and lower sides of the front film 1. At this time, between the front and back films 1, 2 and 2a,
As shown in FIG. 2, laver 3 is inserted.

Then, as shown in FIG. 3, seals 4 for fixing the front film 1 and the upper and lower back films 2, 2a are provided at the four corners of the front film 1, and the front and back films 1, 2, 2 of the seaweed 3 are provided.
Prevent it from coming out from between a. Further, when the front and back films 1, 2, 2a are torn by the cuts 5 and 5, the engagement between the seaweed 3 and the seal 4 is promptly released to separate the seaweed 3 from the front and back films 1, 2, 2a. The seaweed 3 is prevented from breaking.

Next, in packaging the rice ball 6,
For example, as shown in FIG. 4, a triangle-shaped rice ball 6 is placed on the upper back film 2 with the top centered upward, and the lower back film 2a is folded onto the rice ball 6 together with the sealed front film 1.

Finally, the front and back films 1 and 2, 1 and 2a which are sealed in the upper left and right corners of the rice ball 6 are placed on the rice ball 6.
Fold in the direction of the arrow in FIG. 5A along the triangular hypotenuse. And the front and back films 1, 2, and 2a that are overlapped
The lower back film 2a is sealed at its corners and the front film 1 folded on the rice ball 6 is sealed with an adhesive tape 7 or the like.

When eating, the adhesive tape 7 and the like are peeled off, and the front and back films 1 and 2 or 1 and 2a having the left and right upper corners of the rice ball 6 sealed are extended to the state shown in FIG. Direction (left and right).

Then, the front and back films 1 and 2 or 1 and 2a are vertically split from the cuts 5 and 5 gathered on the top of the rice ball 6. Then, the seaweed 3 and the upper and lower back films 2, 2a inserted between the upper and lower back films 2, 2a and the front film 1
The rice ball 6 wrapped between them comes into direct contact as shown in FIG. 7 and can be eaten with one touch.

The seaweed 3 and the rice ball 6 may be eaten in a state of being in direct contact, or the rice ball 6 may be wrapped in the seaweed 3 from the state of being in direct contact as shown in FIG.

Example 2 In this example, the directional synthetic resin film was used with the direction of easy tearing being set to the lateral and lateral directions.
Can easily be torn laterally.

Similarly, the upper and lower back films 2 and 2a are also used with the easy tearing direction set to the lateral left and right directions, and the notches 5a and 5a reaching the front film 1 at the center of the left and right ends of the back films 2 and 2a, respectively. Is provided, and other than that is similar to the first embodiment.

[0062]

The seaweed 3 and the triangular rice ball 6 separated by the front and back films 1, 2 and 2a are easily separated from the seaweed 3 by cutting the notch 5 at the top of the packaging material as shown in FIG. 5 (A). The rice ball 6 directly contacts. Alternatively, as shown in FIG. 5 (B), the seaweed 3 and the rice ball 6 are easily brought into direct contact with each other by cleaving the cuts 5a, 5a at the center of the left and right ends of the packaging material. Therefore, anyone can easily wrap rice ball 6 with seaweed 3 and eat it.

Further, in the present invention, the direction of easy tearing of the directional synthetic resin film is used with the vertical direction in the vertical direction or the horizontal direction in the horizontal direction. , 5, 5a, 5a are provided, it is not necessary to provide perforations or the like. Therefore, the rice ball packaging material for separating seaweed becomes inexpensive. In addition, there is no risk that the perforations will unintentionally tear, and the front and back films 1, 2, 2a
The direction of tearing is fixed, so there is no need to worry about the cleavage opening to an unnecessary location. Further, since the seal 4 parts of the front and back films 1, 2 and 2a are only the four corners of the front film 1, engagement of the seaweed 3 and the seal 4 part is small, and the seaweed 3 is quickly transferred from the front and back films 1, 2 and 2a. Release, front and back film 1,
It does not get caught in 2, 2a. Therefore, the seaweed 3 is not broken or only the rice ball is not exposed.

Further, since it is not necessary to provide perforations or the like on the front film, there is no infiltration of moisture from the perforations or the like, and the seaweed 3 will not get wet.

[Brief description of drawings]

FIG. 1 is a perspective view in which front and back films of a packaging material of the present invention are polymerized.

FIG. 2 is a plan view showing a state in which seaweed is inserted between front and back films.

FIG. 3 is a plan view showing a state in which four corners of the front film of FIG. 2 are sealed, and cuts are formed in the upper and lower sides of the front and back films in the vertical center.

FIG. 4 is a plan view showing a procedure for wrapping a rice ball, in which the rice ball is placed on one of the back films.

FIG. 5 shows a procedure for wrapping a rice ball, and is a plan view showing a state in which the other back film is folded over the rice ball,
(A) is that of the first embodiment, and (B) is that of the second embodiment.

FIG. 6 shows a procedure for wrapping a rice ball, in which the corners where the front and back films on both sides of the rice ball are sealed are shown in FIG.
It is a perspective view of the state which folded in the arrow direction of (A), and sealed the front film with the adhesive tape.

FIG. 7 shows a state when the packaging material is opened, in which the front and back films above both sides of the folded rice ball are expanded, and FIG.
FIG. 4 is a plan view showing a state in which the both sides of the upper portion are pulled to the left and right to cut the notch in the state shown in FIG.

FIG. 8 is a perspective view of a rice ball wrapped with seaweed.

[Explanation of symbols]

 1 Front film 2 Upper back film 2a Lower back film 3 Nori 4 Seal 5,5a Notch 6 Triangular rice ball 7 Adhesive tape

Claims (4)

(57) [Claims] 1. A directional synthetic resin front film 1 and two back films 2 and 2a similar to the front film 1, which are slightly larger than half of the front film 1, are provided with the easy tearing direction being the vertical direction in the vertical direction. , The two back films 2, 2a are partly overlapped with each other, and the seaweed 3 is inserted between the front and back films 1, 2 and 2a to be superposed above and below the front film 1, and superposed on the four corners of the front film 1. Front film 1 and upper and lower back films 2, 2
A seal 4 for fixing a is provided, and cuts 5 and 5 are provided at the central portions of the upper and lower ends of the polymerized front and back films 1, 2 and 2a.
The triangle-shaped rice ball 6 is placed so that the top is located at the center of the upper back film 2, and the lower back film 2a is folded together with the front film 1 onto the rice ball 6, and the front and back films 1 having the upper corners on both sides of the rice ball 6 sealed. A rice ball wrapping material for separating seaweed characterized in that 2, 2a is folded on a rice ball 6, wrapped in a triangular shape, and sealed with an adhesive tape 7 or the like. 2. A directional synthetic resin front film 1 and two back films 2 and 2a similar to the front film 1, which are slightly larger than half of the front film 1, are provided with the easy tearing direction in the lateral direction. , Two back films 2, 2a are partly overlapped and superposed on top and bottom of the front film 1, and seaweed 3 is inserted between these front and back films 1, 2 and 2a, and the front film is placed at four corners of the front film 1. 1 and the upper and lower back films 2, 2a are provided with a seal 4, and the front and back films 1, 2, which are polymerized
Cuts 5a, 5a reaching the front film 1 are provided at the central portions of the left and right ends of the upper and lower back films 2, 2a, respectively.
The triangle-shaped rice ball 6 is placed so that the top is located at the center of the upper back film 2, and the lower back film 2a is folded together with the front film 1 onto the rice ball 6, and the front and back films 1 having the upper corners on both sides of the rice ball 6 sealed. A rice ball wrapping material for separating seaweed characterized in that 2, 2a is folded on a rice ball 6, wrapped in a triangular shape, and sealed with an adhesive tape 7 or the like. 3. A directional synthetic resin front film 1 and two back films 2, 2a similar to the front film 1, which are slightly larger than half of the front film 1, are made to have an easy tearing direction in the vertical direction. A part of the back film 2, 2a is superposed and superposed on and under the front film 1, and the front and back films 1, 2,
Nori 3 is inserted between 2a, seals 4 for fixing the upper and lower back films 2, 2a are provided at the four corners of the front film 1, and cuts 5, 5 are made in the center of the upper and lower ends of the front and back films 1, 2, 2a. , A triangle-shaped rice ball 6 is placed so that the top is located at the center of the upper and lower film 2, and the lower and rear film 2a is folded together with the front film 1 onto the rice ball 6 and the front and back films 1 on both sides of which the rice balls 6 are sealed , 2, 2a are folded on the rice ball 6, wrapped in a triangular shape, and sealed with an adhesive tape 7 or the like, and the adhesive tape 7 or the like is peeled off from the packaging material, and the corner is folded on the rice ball 6 The front and back films 1, 2 and 2a whose parts are sealed are extended to form the front and back films 1, 2,
By pulling the upper or lower ends of 2, 2a to the left and right to vertically cut at the notches 5 and 5 provided in the central portions of the upper and lower ends of the front and back films 1, 2, 2a, the rice ball 6
The back film 2 and 2a which separated the seaweed 3 and the seaweed 3 are removed together with the front film 1, and the seaweed 3 and the rice ball 6 are directly contacted,
A method for opening a rice ball packaging material for separating seaweed, characterized in that rice ball 6 is wrapped with seaweed 3 with one touch so that it can be eaten. 4. A directional synthetic resin front film 1 and two back films 2, 2a similar to the front film 1, which are slightly larger than half of the front film 1, are made to have an easy tearing direction in a lateral direction and a left and right direction. A part of the back film 2, 2a is superposed and superposed on the top and bottom of the front film 1, and seaweed 3 is inserted between these front and back films 1, 2 and 2a, and the top and bottom back films 2 are placed at the four corners of the front film 1. , 2a are provided with a seal 4 and the upper and lower films formed on the upper and lower sides of the front film 1
Cuts 5a, 5a reaching the front film 1 are made in the central portions of the left and right ends of 2a, and a triangular rice ball 6 is placed so that the top portion comes to the center of the upper back film 2 and the lower back film 2a.
The front and back films 1, 2, 2 with the front film 1 folded over the rice ball 6 and the corners above both sides of the rice ball 6 are sealed.
Fold a on rice ball 6 and wrap it in a triangular shape and seal it with adhesive tape 7 etc. Remove the seal of adhesive tape 7 etc. from this packaging material and seal the corner folded on rice ball 6 The front and back films 1, 2, and 2a are stretched, and the left and right ends of the front and back films 1, 2, and 2a are pulled up and down to separate the rice ball 6 and the seaweed 3 from the back films 2 and 2a.
Is removed along with the front film 1 by laterally splitting it in the notches 5a, 5a provided at the center of the left and right ends of the upper and lower back films 2, 2a, respectively, and the seaweed 3 and the rice ball 6 are directly contacted, and the rice ball 6 is one-touched. A method of opening a rice ball packaging material for isolating seaweed, characterized in that it was wrapped in seaweed 3 so that it could be eaten.