JP2012006652A - Center seal bag for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container for a microwave oven which can be heated in the microwave oven safely after it is once unsealed, and charged with food materials or the like.SOLUTION: A center seal bag for the microwave oven is a bag-like container composed of a body packaging material of two faces of the back and front and a bottom tape material folded in its lower part, and of which the mutual inner faces of the body packaging materials in the container ends except opening portions and of which the inner face of the bottom tape material with the inner face of the body packaging materials are heat-welded in the shape of a straight line is characterized in that it is provided with a steam passing-through portion which exfoliates by internal pressure in the position where the lower part of a chuck portion is approached by preparing the chuck portion which can be used to install by making the opening portion as a top face and which has resealing nature in the opening portion of this container which has resealing nature in the opening portion of this container, as a form of the center seal bag of which the bottom portion is extended by opening the bottom tape material folded up, and inserted into the inner face of the body packaging material.

Description

  TECHNICAL FIELD The present invention relates to a cooking bag for a microwave oven for charging food inside and cooking with a microwave oven together with a seasoning liquid and the like.

  Conventionally, so-called retort foods in which foods contained in packaging bags such as pouches are heated and sterilized in a retort kettle are widely distributed and used. Since the retort food is sealed by the packaging bag, if it is to be heated as it is in the microwave oven, the packaging bag may expand and burst due to water vapor generated from the food.

As a product using a cooking bag for cooking by heating in a microwave oven, open the pouch ingredients that have been retort sterilized with the seasoning liquid, put the specified ingredients and reseal with the bag chuck, Products with a structure that allows steam to escape from the chuck during heating and pressurization are on the market.
As a package equipped with a re-sealable chuck, a flat bag and a self-standing bag (standing pouch) are generally used.

To give an example of a self-supporting type, in Patent Document 1, there is a thawing bag provided with a linear fastener inside the opening on the upper side of the bag and having an unsealed portion for venting the side seal or bottom seal. Proposed.
In addition, the position and shape of the steaming part and chuck mechanism are devised in the form of a standing pouch, a chuck mechanism is provided at the top, and a valve mechanism that peels off by internal pressure is provided at the seal parts on both sides in the vicinity of the chuck mechanism. Patent Document 2 proposes a packaging container that can be reused repeatedly.

To give some examples of a flat bag with a devised steam vent structure, in Patent Document 3, an openable and closable opening is provided, and an inner film layer made of a polyolefin-based resin film having fine pores capable of passing through steam is provided. And an outer film layer made of a polyolefin resin film having fine pores fixed to the surface and capable of vapor transmission. These film layers have a function of adjusting the amount of water vapor vented by heating. A packaging bag has been proposed.
Furthermore, it is equipped with a steam release part, a food material input part having a zipper part that can be freely opened and closed, and a folded part on the back side. When heated and the internal pressure rises, the steam release part peels off to form a steam hole A packaging bag to be used is proposed in Patent Document 4, Patent Document 5, and Patent Document 6.

These proposals open the pouch food, put the specified food, reseal it with the bag chuck, and have a certain effect for the purpose of safely releasing the vapor from the bag when heating and pressurizing in the range However, in the actual handling work, there were some problems in that a series of cooking was performed simply and safely.
For example, in the case of putting fish in a bag and cooking it with seasonings, etc., in the form of free-standing bags, it is difficult to put in and out of the contents, especially when it is taken out of the bag after cooking is complete Is done.
Also, in the case of a flat bag, it is easy to put in and out because it opens from the side, but since the chuck is in the horizontal position, seasoning liquid spills from the bag into the range if the part of the chuck becomes sweet during cooking There is a high risk of escaping.

The present inventors have made use of an existing self-supporting bag making machine with a chuck, and it is easy for food (such as fish) to be taken in and out according to a palm bag with a chuck attached to the center (back) portion. Focusing on the fact that the seasoning liquid hardly leaks from the bag even if the fitting of a part of the chuck becomes sweet by being located at the upper center, the present invention has reached the packaging bag (joint bag) of the present invention.
According to this packaging bag, in the case of foods that tend to boil, after the chuck part is folded to one side of the bag, the chuck part is opened, the contents are inserted from the side and resealed before cooking in a microwave oven Even if the bag swells due to the heating inside and the fitting of a part of the chuck becomes sweet, the seasoning liquid can be taken out from the side without losing the contents in a state in which it is difficult to leak to the outside.

Japanese Utility Model Publication No. 63-3969 Japanese Patent No. 3802205 JP 2006-44708 A JP 2009-166853 A JP 2009-166846 A JP 2009-166847 A

The present invention has been made in view of the above circumstances, and provides a palm bag for a microwave oven that can be opened once and filled with water, a low-viscosity liquid and foods, and then heated safely in a microwave oven. The purpose is to do.
More specifically, even in the case of ingredients that tend to boil during cooking, after folding the chuck part to one side of the bag, open the chuck part, insert the contents from the top or side, reseal, and cook in the microwave By doing this, even if the bag expands due to heating and the fitting of a part of the chuck becomes sweet, it is possible to remove the contents from the top or side without breaking the contents while the seasoning liquid is difficult to leak outside. Providing is a challenge.

The invention according to claim 1 of the present invention comprises a main body wrapping material having two front and back surfaces and a bottom tape material folded at the lower part thereof, and the inner surface of the main body wrapping material at the container end other than the opening and the inner surface of the bottom tape material. A bag-like container in which the inner surface of the main body packaging material is thermally welded linearly,
Opening the bottom tape material inserted on the inner surface of the main body packaging material, and opening the bottom part, it can be installed with the opening part as the upper surface, and a chuck part with resealability at the opening part of the container It is provided with a steaming part that is provided and is provided with a steaming part that is peeled off by an internal pressure at a position near the lower part of the chuck part.

  In the invention according to claim 2 of the present invention, the height of the bottom tape material folded at the bottom is different between the front and back surfaces, and the shorter height is longer than the length from the folded position of the bottom tape material to the opening. The gas palm bag for a microwave oven according to claim 1, wherein

  The invention according to claim 3 of the present invention is characterized in that the shape of the seal region in which the inner surface of the bottom tape material and the inner surface of the main body packaging material are heat-welded is the same shape as the linear seal region in which the main body packaging material is heat-welded. It is a palm bag for a microwave oven according to any one of claims 1 to 2.

  The invention according to claim 4 of the present invention is characterized in that the height of the main body packaging material is in the range of 100 mm to 250 mm, and the height of the bottom tape material folded in the lower portion is in the range of 80 mm to 150 mm. It is a palm bag for a microwave oven according to any one of claims 1 to 3.

In the invention according to claim 5 of the present invention, the vapor passing part has a diameter of 1 mm provided on an unsealed part having a width of 1 mm to 3 mm provided on both sides of the container below the chuck part mechanism or on the side seal part on one side, or on the main body packaging material. It is comprised by several through-holes from 2 mm to 2 mm, The palm bag for microwave ovens of any one of Claim 1 to 4 characterized by the above-mentioned.

  According to the palm bag for the microwave oven of the present invention, even in the case of foods that are easily boiled during cooking, after the chuck portion is bent to one side of the bag, the chuck portion is opened, and the contents are inserted from above or from the side again. By cooking in a microwave oven after sealing, the bag expands due to heating, and even if the fitting of a part of the chuck becomes sweet, the seasoning liquid can be taken out without breaking the contents from the top or side in a state that it is difficult to leak outside It is possible to provide a palm bag for a microwave oven. The main points of the above effect will be described below with reference to the drawings showing the state in use.

  FIG. 8 shows a schematic view when the chuck portion of the palm bag for a microwave oven of the present invention is used as an upper surface. (A) is a general view of the bag before it is made into a palm form, and (b) is a schematic view in which the upright standing part is raised from the bottom tape folding part to make it a joint form. FIG. 9 is an explanatory diagram of how to use the bags when the chuck is used with the upper surface (a) and when used sideways (b).

  As shown in FIG. 8 (a), the joint bag of the invention of claim 1 is composed of a main body wrapping material on the front and back surfaces and a bottom tape material (4) folded at the lower part thereof, and the container end other than the opening. A bag in which the inner surface of the main body packaging material is thermally welded linearly at the position of the side seal (6) and the inner surface of the bottom tape material and the inner surface of the main body packaging material at the position of the bottom seal length (7a) and the side of the bottom seal (7b). Assembled from a container. In the figure, A indicates the height from the bottom tape fold (8) to the opening, B indicates the width of the main body packaging material, and W indicates the height from the bottom tape fold (8) to the bag bottom.

After creating this container, as shown in FIG. 8 (b), the bottom tape material (4) folded and inserted into the inner surface of the main body packaging material is opened at the folding portion (8), and the bottom portion is expanded as a form of a palm bag. It can be installed with the raised opening as the upper surface.
In addition, since the container has a resealable chuck part at the opening of the container, and a steaming part for a microwave oven provided with a steaming part that peels off by internal pressure at a position near the lower part of the chuck part, the chuck part ( A use method of opening and resealing in a standing state with the back chuck part including the opening part provided with 1) on the upper surface is possible.
Since the opening can be arranged at the top in this way, it is easy to take in and out even large contents, and even when the chuck is slightly sweetened, liquid contents such as seasoning liquid are not easily spilled during cooking. Have.

  Furthermore, by providing a steaming part that peels off by the internal pressure at a position close to the lower part of the chuck part, even when the internal pressure of the bag rises due to heating in microwave cooking, the steam is released by the internal pressure. Less likely to break into bags due to the effect of the steaming section. Even if the internal pressure is larger than expected and the vapor permeation through the steaming part alone does not prevent leakage from the chuck part, the leaked content is because the chuck part is provided in the upper part of the standing bag. The worst result of things spilling on the top of the bag and spreading into the range can be avoided.

FIG. 9 shows how to use the bags when the chuck part is used with the upper surface as described above (a) and when it is used sideways (b).
According to the invention of claim 2, when used sideways, the chuck is opened in a state where the back portion including the chuck portion (1) is lying on one side of the bag and bent as shown in FIG. When the contents (foodstuffs) are put in and out from the side as indicated by the white arrows, the bottom tape material (4) folded at the bottom has different heights on the front and back sides, and the shorter one (A + α) is the bottom tape material. By being longer than the length (A) from the folded position to the opening, liquid substances such as seasoning liquid leaking from the opening do not directly stain the bottom surface of the range.
In addition, after resealing the chuck portion and cooking in the microwave oven, it is possible to easily take out slender contents such as Sanma from the side without breaking the shape.

  According to invention of Claim 3, the shape of the seal | sticker area | region (7) which heat-welded the bottom tape material inner surface and the main body packaging material inner surface is the same shape as the linear seal area | region (6) which heat-welded main body packaging materials. For this reason, the folded bottom tape material is inserted into the main body packaging material without punching, and a vertical heat seal is applied to the main body packaging material, and the main body packaging material and the bottom tape material are thermally welded to perform bottom sealing, and the same width dimensions Since the side sealing can be performed by thermally welding the inner surfaces of the main body packaging material, both can be performed with a heat seal bar having the same shape, and thus can be easily manufactured.

  According to the invention of claim 4, since the height of the main body wrapping material is in the range of 100 mm to 250 mm, and the height of the bottom tape material folded in the lower portion is in the range of 80 mm to 150 mm, It is the dimension which can be easily put into the inside of the cooking chamber. In addition, if the height of the part to be raised is too high, it will be unstable when placed on the bottom of the range and the contents will not be stored efficiently, and if the height of the part to be raised is too low, it will be difficult to operate. Can be avoided.

According to the invention of claim 5, a plurality of through-holes having a diameter of 1 mm to 2 mm provided in an unsealed portion having a width of 1 mm to 3 mm provided on both sides or a side seal portion on one side of the lower portion of the chuck mechanism or a main body packaging material. Providing the steaming part constituted by the holes can prevent the container from rupturing due to an increase in the steam internal pressure in the container during heating by the microwave oven and the unintentional disconnection of the chuck mechanism. This prevents the contents from spilling outside during cooking.
The width of the unsealed portion provided in the side seal portion and the dimensions of the plurality of through holes provided in the main body wrapping material are determined by the above-mentioned effects and the content protecting property as a container. In this case, the above dimensions are desirable.

  Some examples of such a vapor passage section are shown in FIG. (1) in FIG. 6 is an unwelded part in which 1 to 5 grooves having a width of 1 to 3 mm are put in a linear seal bar around the lower part of the chuck part, which is constituted by unsealed parts provided on side seal parts on both sides of the container. The structure which formed is shown. In FIG. 6 (1), only the bag end (13) on the left side in the container width direction is shown, but of course, the opposite bag end or both ends may be used. The side seal (6) on the side of the bag end (13) on the side of the lower part (not shown) of the chuck part has an unwelded part (10) as a seal part over the width between the bag end and the inside of the container (12). It is alternately formed with (11) and forms a steaming section (9).

  The shape of this vapor passing portion is, for example, a wedge-shaped unwelded portion (10) formed on the seal portion (11) of the side seal (6) as shown in FIGS. 6 (3), (4) and (5). It may be a shape that peels off from the front end of the unwelded portion due to the stress concentration in the peeling direction increased by the internal pressure P (indicated by white arrows) during heating.

  By concentrating the welding pattern of the heat seal part formed on the heat seal part on the side of the container as shown in the figure, stress concentrates on the peeling of the steaming part due to an increase in pressure inside the container during microwave heating. It is possible to prevent the generation of steam holes outside the steaming section by starting sensitively at a predetermined position. As a result, it is possible to more reliably perform cooking by microwave heating safely without causing leakage of contents or jetting of steam at unexpected parts.

FIG. 6 (2) shows an example of the steaming section formed by a plurality of through holes (14) provided in the main body packaging material. According to this method, it is possible to form the steaming part without using a specially shaped seal bar with a space corresponding to the unwelded part region in the heat seal bar of the side seal (6). If necessary, a plurality of methods may be used to form the vapor passage section.

  That is, by forming at least two steaming parts, even if there is an abnormality in one steaming part, the contents in an unexpected part by steaming from the other steaming part. It is possible to more securely cook by microwave heating without the leakage of things and the ejection of steam.

FIG. 7 shows an example of a heating mode in a microwave oven when the palm bag for a microwave oven according to the present invention is used with the chuck portion lying sideways. (A) of FIG. 7 is a schematic diagram when a steaming part is provided in the side seal part, and (b) is a schematic view when a through hole is provided in the main body packaging material.
In the palm bag filled with the contents (15), the bottom surface of the bottom tape material (4), which is pushed around the folded portion (8), is spread downward and the main body packaging material (2) is facing upward. It is placed on the range floor. The main body wrapping material (3) on the back surface is folded inward with the folded portion (8) of the bottom tape material (4) as the center, and the standing portion including the steaming portion (9) is located above the opening portion (5). On the back of the main body packaging material (3) (with the chuck portion sideways).

  When the internal pressure of the container increases due to the water vapor generated from the contents (15) by heating in the microwave oven, the volume of the internal space increases, and the main body packaging material (2) on the front surface is further pushed upward, and the chuck portion (1) and As the position of the steaming section (9) increases, water vapor is ejected from the steaming section (9) and the through hole (14). In this case, since the water vapor ejection position is high and the direction of ejection is from the side to the top, and the opening (5) is positioned above the folded back main body packaging material (3), It is possible to minimize the influence such as leakage of contents from the chuck portion (1) which may occur.

  As described above, the palm bag for the microwave oven according to the present invention uses the vapor pressure of water vapor generated inside the container when heated in the microwave oven to release water vapor outside the container without causing the container to burst, and By forming a steaming part above the container, it is also equipped with a structure that raises the water vapor release position and prevents leakage of contents food, so it is opened once and filled with water, low viscosity liquid and food After that, you can safely cook in the microwave.

FIG. 3 is a schematic diagram of bag making of the palm bag according to the present invention (when the chuck portion is used as an upper surface). (A) Overall view (b) X-X 'sectional view Schematic diagram with bottom tape material extended to the left and right in the form of a palm (when used with the chuck part on top). (A) Overall view (b) Cross section The bag making schematic diagram of the palm bag of this invention (when using a chuck | zipper part sideways). (A) Overall view (b) X-X 'sectional view Schematic diagram of slit after heat sealing with the back side of the main unit and bottom tape material (when using the chuck part sideways). (A) Overall view (b) X-X 'sectional view Schematic diagram in which the bottom tape material is spread left and right and the chuck portion is folded upward to form a palm-like configuration (when the chuck portion is used sideways). (A) Overall view (b) X-X 'sectional view Example of a partially enlarged schematic diagram of the steaming part of the gasshobukuro of the invention The example of the form at the time of the heating in the microwave oven using the palm bag of this invention (when using a chuck | zipper part sideways). (A) When the steaming part is provided in the side seal part (b) When the steaming part is provided as a through hole under the chuck part. The example of the bag making schematic diagram of the palm bag of this invention (when using a chuck | zipper part as an upper surface). (A) Overall view (b) Schematic diagram in the form of a palm Explanatory drawing of the usage method of the palm bag of the present invention (when using the chuck portion as the upper surface (a) and when using it sideways (b)) The cross-sectional schematic diagram which shows an example of the material which comprises the palm bag of this invention. (A) An example of a main body packaging material, (b) An example of an intermediate | middle layer.

  Hereinafter, an embodiment of a cooking bag for a microwave oven according to the present invention will be described with reference to the drawings. In the following description, a case is described where the microwave-sized palm bag is used in a state where the chuck portion is at the top and the opening portion is facing upward during cooking. If so, the present invention can also be applied when the orientation of the opening is lateral. A first representative shape example that can be applied as a palm bag for a microwave oven according to the present invention is shown in FIGS. 1 and 2, and other typical shape examples are shown in FIGS.

FIG. 1 is a schematic diagram of bag making when the zipper bag of the present invention is used with the chuck portion as an upper surface, (a) is a schematic front view of the whole, and (b) is an XX ′ line of (a). FIG.
FIG. 2 is a schematic view in which the bottom tape material is spread left and right in the joint bag of FIG. 1 to form a joint form, (a) is a schematic front view of the whole, and (b) is a sectional view.

  As shown in FIGS. 1 (a) and 1 (b), the palm bag for a microwave oven of the present invention has a main body packaging material (2) constituting the front surface of the bag and a front and back 2 of the main body packaging material (3) constituting the back surface of the bag. It consists of a main body packaging material on the surface and a bottom tape material (4) folded in the lower part (bottom portion), and the inner surface of the main body packaging material at the three container ends other than the opening (5) is thermally welded linearly (6) A bag-like container in which the inner surface of the bottom tape material and the inner surface of the main packaging material are linearly heat-welded (7) (bottom seal), and the bag is made using a normal automatic bag making machine. I can do it.

  FIG. 1 is a schematic view of bag making in the case of using the chuck portion (1) with the upper surface of the container when the contents are put in and out or heated in a microwave oven. The opening part (5) is provided with a resealable chuck part (1) for taking in and out the contents, and a steaming part (9) for peeling off by internal pressure is provided at a position near the lower part of the chuck part. It prevents bag breakage during heating in the microwave.

  2 (a) and 2 (b), the bottom tape material (4), which is inserted into the main body packaging material by folding, is opened from the bottom tape folding portion (8) with respect to the bag after the bag making shown in FIG. As a form of a palm bag with the bottom expanded, the palm bag for a microwave oven in a state that can be installed with the opening (5) on the upper surface is shown.

  By opening the bottom tape (4) approximately 180 degrees, a bottom surface twice as long as the folding width (W) of the bottom tape is formed, and at the same time, the bottom tape folding portion (8) to the chuck portion (1) are provided. The upright portion formed at the height (A) of the opening is raised at an angle with respect to the bottom surface formed by opening the bottom tape. The height (A) of the opening and the angle (β) with respect to the bottom surface are not fixed, but can be freely set depending on the overall size of the joint bag considering the stability, the ease of taking in and out the contents, and the like. .

When used for cooking in a home microwave oven, the height (W + A) of the main body wrapping material is in the range of 100 mm to 250 mm, and the height (W) of the bottom tape material folded at the bottom is 80 mm to 150 mm. It is desirable to be in the range.
In addition, when the height of the container front surface and the container rear surface of the bottom tape folding part is the same, the width of the seal bar that thermally welds the inner surface of the bottom tape material and the inner surface of the main body packaging material is heat-sealed between the main body packaging materials. This is advantageous from the standpoint of bag-making efficiency because it has the same shape as the linear seal bar.

FIG. 6 shows some examples of the shape of the steaming part of the palm-bag for the microwave oven according to the present invention.
FIG. 6 (1) shows the case where the steaming part (9) is formed by the unsealed parts (10) provided on the side seal parts (6) on both sides of the container below the chuck part (1) mechanism. It was.
Heat welding using a seal bar provided with a depression on the line in the width direction of the seal at the lower part of the chuck part (1) mechanism of the linear side seal (6) provided at the bag end (13) of the container In this way, an unwelded portion having a width of 1 mm to 3 mm having a vapor passing function can be formed.

6 (3), FIG. 6 (4), and FIG. 6 (5) are examples of another shape of the vapor transmission section, and in the gas palm bag of the present invention, the vapor transmission section (9) is the main body. The example in the case of being configured by a plurality of through holes having a diameter of 1 mm to 2 mm provided in the packaging material is shown. Since these descriptions are already described, they are omitted.
By making the steaming part of the gas palm bag for microwave ovens in such a seal shape, the adhesive part on the inner surface of the main body packaging material peels off at the narrowest part due to internal pressure during heating in the microwave oven and reaches the end of the side seal Then it opens and passes the steam.

After filling the joint bag from the chuck part (1) at the upper part of the opening, the chuck is resealed and microwave heating is performed. When heating by the microwave oven progresses and the internal pressure rises and stress concentrates in the seal recess, the seal retreat begins, and the narrowest part retreats from the bag end (13) to the outside, releasing steam ( Steaming) is started. In the figure, the white pressure arrow P symbolizes the internal pressure stress in the bag end direction.
As a result, the contents of the foodstuff and the like can be discharged from the steaming section without causing leakage, and the pressure of excess water vapor can be dissipated to prevent the container from bursting and can be heated safely.

Another typical shape example is shown in FIGS. FIG. 3 is a schematic view of bag making when the zipper bag of the present invention is used with the chuck portion lying sideways, (a) is a schematic front view of the whole, and (b) is a XX ′ line of (a). FIG.
4A and 4B are schematic views showing a state in which the back body packaging material and the bottom tape material are slit after heat sealing in the joint bag of FIG. 3, wherein FIG. 4A is a schematic front view of the whole, and FIG. .
FIG. 5 is a schematic view in which the bottom tape material is spread left and right in the joint bag of FIG. 4 and the chuck portion is folded upward to form a joint form, (a) is a schematic front view of the whole, and (b) is a sectional view. It is.
When using the palm bag of the present invention with the chuck portion sideways, the height of the bottom tape material folded at the bottom at the bag making stage differs between the front and back sides, and the shorter height is folded into the bottom tape material. It is easier to use a shape longer than the length from the raised position to the opening in consideration of taking in and out the contents of an elongated outer shape and possible leakage from the opening.

  FIG. 3 is a schematic view of bag making that is convenient when the chuck part (1) is used while being laid sideways on the upper surface of the container when the contents are put in and out or heated in a microwave oven. The opening part (5) is provided with a resealable chuck part (1) for taking in and out the contents, and a steaming part (9) for peeling off by internal pressure is provided at a position near the lower part of the chuck part. It prevents bag breakage during heating in the microwave.

  As shown in FIGS. 3 (a) and 3 (b), the palm bag for a microwave oven of the present invention has a main body packaging material (2) constituting the front surface of the bag and a front and back 2 of the main body packaging material (3) constituting the back surface of the bag. It consists of a main body packaging material on the surface and a bottom tape material (4) folded in the lower part (bottom portion), and the inner surface of the main body packaging material at the three container ends other than the opening (5) is thermally welded linearly (6) A side-sealed bag-like container in which the inner surface of the main body packaging material and the inner surface of the bottom tape material are thermally welded linearly (7) (bottom seal) using an automatic bag-making machine. You can make bags.

4 (a) and 4 (b), the bottom side packaging material and the bottom tape material are bottom sealed at a position shorter than the front side in the vertical direction with respect to the bag after bag making shown in FIG. The state of the stage which formed the bag-shaped part of the folding height shorter than the front side by slitting is shown.
5 (a) and 5 (b), the bottom tape material (4) inserted into the main body packaging material by folding is opened from the bottom tape folding portion (8) with respect to the bag after bag making shown in FIG. As a form of a palm bag with the bottom expanded, the palm bag for a microwave oven in a state that can be installed with the opening (5) on the upper surface is shown.

By opening the bottom tape (4) approximately 180 degrees, a bottom surface having a length corresponding to the folding width (W + A + α) of the bottom tape is formed.
At the same time, the upright portion formed at the height (A) of the opening provided with the chuck portion (1) from the bottom tape folding portion (8) is folded with the back body packaging material inside, and the bottom tape is opened. It is raised at a certain angle with respect to the bottom surface (length A + α) on the back side main body packaging material. This angle is preferably about 0 degrees in view of operability when opening and closing the chuck of the opening portion in which the contents are taken in and out sideways. The height (A) of the opening can be set within a range shorter than the folding width (W) of the front side bottom tape so that the length (α) of the protruding portion can be appropriately taken.
The height of the opening (A) and the length (α) of the protruding portion and the angle (β) with respect to the bottom of the bottom opening (A) formed by folding the back body packaging material inside are fixed. However, it can be set freely depending on the overall size of the joint bag considering the stability, the ease of taking in and out the contents, and the like.

The main body wrapping material and the bottom tape material used for the microwave oven joint bag of the present invention are formed of a sheet-like flexible film (hereinafter “main body film”) having heat sealability.
Usually, the main body film uses a laminated film of two or more layers including a base material having heat resistance and contents protection as a cooking bag and a sealant excellent in heat sealability.
Fig.10 (a) is a cross-sectional schematic diagram which shows an example of the main body film (20) which comprises the palm bag for microwave ovens of this invention. In this case, a main body film base material (21) having a printed layer (23) on the inner side surface and a main body film sealant (22) are laminated on the innermost side from the outer side of the container, and an intermediate layer (25) is interposed between them. Laminated on both sides via an adhesive layer (24).
The printing layer (23) and the intermediate layer (25) are provided as necessary, and specific examples of the intermediate layer will be described later.

As a material of the main body film base material (21) constituting the main body film (20) in the palm bag for the microwave oven of the present invention, it has necessary heat resistance and is generally used as a food packaging material heated in a microwave oven. As long as it is, there is no particular limitation.
For example, polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyolefins such as polyethylene (PE) and polypropylene (PP), polyamides such as nylon-6 and nylon-66 Stretched or unstretched resin such as (PA), polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH) Any of a film, nylon 6 / metaxylylenediamine nylon 6 coextruded film, polypropylene / ethylene-vinyl alcohol copolymer coextruded film, and the like can be used.
Alternatively, a composite film obtained by laminating these two or more films may be used.

In addition, the thickness of the main body film substrate (21) is preferably in the range of 10 to 50 μm, more preferably in the range of 10 to 30 μm, in consideration of processability.
For example, known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a coloring agent can be added to the main body film substrate, and they are appropriately added as necessary.
Furthermore, surface modification such as corona discharge treatment and anchor coating treatment may be performed on the surface of the main body film base material to improve adhesion with a sealant layer and the like, which will be described later, and printability.

Moreover, a printing layer (23) can be formed in the surface or back surface of a main body film base material (21) as needed.
The printing layer (23) can be formed on either the front or back side of the main film base (21), but in consideration of the ink friction resistance, weather resistance, etc., as in the case of printing on a general plastic film bag. And it is preferable to provide by the gravure printing system etc. in the surface used as the container inner surface of a base material.

In the palm bag for a microwave oven of the present invention, the innermost body film sealant (22) constituting the body film (20) may be, for example, a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), a high density Polyethylene resin (HDPE), linear low density polyethylene resin (L-LDPE), polypropylene resin (PP), ethylene-propylene copolymer (EP), ethylene-α olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl methacrylate copolymer (EMMA) Resin such as ionomer resin, ethylene-vinyl acetate copolymer (EVA), or You may use these resins formed form a film and the film.
Moreover, the thickness of the layer of the main body film sealant (22) is preferably in the range of 20 μm to 100 μm, more preferably in the range of 30 μm to 70 μm, considering the sealing strength, physical properties, and workability.

  Examples of the method of laminating the outermost body film base material (21) of the main body film (20) and the innermost body film sealant (22) include, for example, a dry lamination method, an extrusion lamination method, and the extrusion lamination. A known method such as a sandwich lamination method using the method can be used.

  The adhesive used in the dry lamination method is appropriately selected from generally used adhesives for laminates such as polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, and others. Can be used.

In the main film (20) of the palm-sized bag for the microwave oven according to the present invention, when the main film base material (21) and the main body film sealant (22) alone cannot sufficiently function as the palm-sized bag for the microwave oven. Can provide an intermediate layer (25) between the main body film substrate and the main body film sealant.
Examples of the function of the cooking bag include gas barrier properties, mechanical toughness, flex resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, and the like. These functions required as a packaging container for a palm-joint bag are achieved by providing an intermediate layer.

  The microwave bag for the microwave oven of the present invention basically achieves a function that can be handled safely without breaking the contents during cooking in the microwave oven, but depending on the contents to be stored, particularly oxygen gas, water vapor, light In the case where durability against long-term distribution at room temperature is required, a material having a function such as a gas barrier layer is provided on the intermediate layer or base material of the main body film at the same time as a structure that reinforces the sealing performance with only the chuck. Needs may arise.

  In FIG.10 (b), the cross-sectional schematic diagram which shows an example of the intermediate | middle layer (25) which comprises the palm bag for microwave ovens of this invention was shown. Here, the intermediate layer base material (29) is provided with a vapor-deposited thin film layer (31) of an inorganic oxide via a primer layer (30), and further a gas barrier coating layer (32) is provided on the surface thereof. Yes.

As the gas barrier layer for the above purpose, a gas barrier film using a gas barrier resin or a gas barrier film provided with another gas barrier layer as illustrated in FIG. 10B on a resin film is used.
For example, ethylene-vinyl alcohol copolymer film (EVOH), polyvinyl alcohol film (PVA), ethylene-vinyl acetate copolymer (EVA) saponified film, polyethylene terephthalate (PET), polyamide (PA), polypropylene (PP) film coated with polyvinylidene chloride, inorganic oxide (silicon oxide, aluminum oxide, etc.) deposited thin film layer, or laminated film combining one or more of these films Can be used.
Among these, a gas barrier film provided with a deposited thin film layer of an inorganic oxide (such as silicon oxide or aluminum oxide) that can be heated in a microwave oven and can be easily disposed of is preferable. These gas barrier layers may be provided on the substrate instead of the intermediate layer.

The chuck portion (1) provided on the inner surface of the upper opening of the palm bag for the microwave oven of the present invention shown in the figure is opened to take in and out the contents, and to seal and heat by the microwave oven It is provided and formed by attaching engagement protrusions that engage with each other using a molded product of a synthetic resin such as polypropylene resin.
Usually, since it is attached to the inner surface (sealant surface) of the container by a heat seal method, when a polypropylene resin is used as the sealant of the container, it is preferable to use a polypropylene resin also for the chuck. The chuck can be attached to the container in-line with the bag making by incorporating a dedicated attachment device into the bag making machine.

Hereinafter, an embodiment of a palm bag for a microwave oven according to the present invention will be described with reference to examples.
<Example 1>

(Material composition)
A biaxially stretched nylon film with a thickness of 15 μm (Idemitsu Unitech: TB1010) as a base material and a polypropylene film with a thickness of 80 μm (Toray: ZK93) as a sealant were bonded together by dry lamination, and the opposite surface was printed on the inner surface. An axially stretched polyethylene terephthalate film was bonded by dry lamination to prepare a main body film and a bottom tape material.
As an adhesive for dry lamination, LX703VL manufactured by Dainippon Ink & Chemicals, Ltd. was used, and the coating amount was 4 g / m ² . A 15 mm width PP-type chuck (Idemitsu Unitech: MFP306) was prepared as the chuck.

(Manufacture of gassho bags)
(1) A chuck is inserted into a sealant surface at a position 10 mm from the top of a main body film having a predetermined size of 290 mm in width and 200 mm in height and thermocompression bonded.
(2) After inserting the bottom tape material (120mm width) into the bottom part of the front and back members of the main body film of a predetermined size with the sealant surface aligned without punching, vertical and horizontal linear heat seal (6mm width) ) And heat weld the main body film and the bottom tape material.
(3) The front member and the rear member of the main body film are heat-bonded on both sides with side seal bars (6 mm width) with the sealant surfaces aligned.
For the side seal bar, heat welding is performed using a bar in which two 1.5 mm wide grooves are provided at intervals of 5 mm at positions 30 mm to 40 mm from the upper part of the main body. As a result, unwelded portions having a width of 1.5 mm are formed at the side seal portions at both ends of the joint bag.
(4) The above-mentioned bags that have been cut and discharged one by one are expanded into a bottom tape portion to form a palm-sack bag. The dimensions as a joint bag are a width of 240 mm (2 W), a height of 290 mm (B), and a center (back bonding) portion of 80 mm (A) (see FIG. 8).

(Cooking example)
After filling the contents consisting of ingredients and seasonings for sardine ginger boiled from the chuck part standing upright into the gas palm bag for microwave oven created in this way, the chuck is fitted and sealed, It was set as the palm-sized bag for microwave ovens with which the contents were sealed.
The ingredients are 60g of seasoning (boiled soup) with 100g of sardine (1 tablespoon soy sauce, 1 tablespoon of mirin, 1 tablespoon of sugar, 2 tablespoons of sake, 5 slices of ginger, appropriate amount of needle ginger, 1/3 of hawk nails) Was used.
First, cook sardines (sabaki, divide the torso into three parts, remove cotton, sprinkle with salt, sprinkle with sake). Next, open the gassho-bukuro, lay three slices of ginger, place the sardines on top, place the slices of ginger on top of the sardines, sprinkle the broth, and add chopped hawk claws.
This is chucked and heated in a microwave oven at 500 W for 2 minutes and 40 seconds. When finished, open the chuck, take out the sardine, heat the remaining broth in the bag for about 3 minutes, and when it is thick, turn it over the sardine and add the needle ginger.

At this time, it was confirmed that in a few minutes after the ingredients were added and heating was started in the microwave, steam spouted from the steaming section at the top of the standing palm bag. During heating, steam continued to erupt from the steaming part, but no leakage of the contents from the steaming part or chuck part was observed.
Thus, since the steaming part in which the steam hole was formed was in the upper part where the gas-lack bag was erected, the cooking was safely completed without the contents leaking out from the steam hole or the chuck.

In the gas palm bag of the present invention, the chuck of the back (center) seal part of the gas palm bag is opened, and ingredients and seasonings according to the cooking recipe are put, and after resealing with the chuck, the microwave oven is heated. . After moderate pressure cooking by microwave heating, steam breaks out from under the chuck and side parts to prevent breakage due to a sudden rise in internal pressure and prevent the contents from opening and jumping out of the chuck It is a microwave cooking bag of structure. Furthermore, after cooking is completed, it is also a cooking bag that can be easily taken out by opening the chuck of the back (center) seal portion of the bag.
Examples of cooking objects include microwave ovens for a wide range of dishes, such as boiled fish (boiled sardine in sardine, boiled flounder), steamed steamed dishes, boiled foods in general, pumpkin simmered, hijiki simmered, simmered in Takano tofu, etc. Can be used for cooking.

The palm-sized bag for the microwave oven according to the present invention can be cooked without soiling the pot because it can not only warm the food but also enclose a favorite food together with the seasoning etc. and cook it in the microwave. It is possible to save detergent and water for cleaning.
In recent years, the boom in lifestyle habits called “returning to home meals” and “nesting” continues, and there is a significant trend toward an increase in the volume of Japanese and individual foods that are health-conscious. Cooking appliances such as microwave ovens are also widely used, and the penetration rate of the range exceeds 97%.

Corresponding to such a situation, the palm bag for the microwave oven according to the present invention can easily take out various objects to be cooked by heating and pressurizing in the range without breaking the shape with a small capacity. The bag after use is cooled and discarded, so that the time and effort for cleaning up can be saved.
Moreover, this bag can be applied not only to foods but also to heating of various materials including moisture in a microwave oven.

DESCRIPTION OF SYMBOLS 1 ... Chuck part 2 ... Front body packaging material 3 ... Back body packaging material 4 ... Bottom tape material 5 ... Opening part 6 ... Side seal 7 ... Bottom seal 7a ... Bottom seal length 7b ... Bottom seal width 8 ... Bottom tape folding part 9 ... steaming part 10 ... unwelded part 11 ... seal part 12 ... inner surface 13 ... bag end 14 ... through hole 15 ... contents 16 ... standing part (back seal part)
DESCRIPTION OF SYMBOLS 20 ... Main body film 21 ... Main body film base material 22 ... Main body film sealant 23 ... Printing layer 24 ... Adhesive layer 25 ... Intermediate layer 29 ... Intermediate layer base material 30 ... Primer layer 31 ... Deposition thin film layer 32 of inorganic oxide ... Gas barrier Covering layer A ... Standing part (back seal part) height B ... Width α ... Projection part height W ... Bottom tape folding width β ... Back seal part standing angle P ... Internal pressure

Claims (5)

It consists of the main body wrapping material on the front and back two sides and the bottom tape material folded in the lower part, and the inner surface of the main body wrapping material at the container end other than the opening and the inner surface of the bottom tape material and the inner surface of the main body wrapping material are linearly heat-sealed. A bag-like container,
Opening the bottom tape material inserted on the inner surface of the main body packaging material, and opening the bottom part, it can be installed with the opening part as the upper surface, and a chuck part with resealability at the opening part of the container A steaming bag for a microwave oven provided and provided with a steaming part that is peeled off by an internal pressure at a position near the lower part of the chuck part.   The height of the bottom tape material folded in the lower part is different between the front and back sides, and the shorter height is longer than the length from the folded position of the bottom tape material to the opening. Gassho for a microwave oven.   The shape of the sealing region where the inner surface of the bottom tape material and the inner surface of the main body packaging material are heat-welded is the same shape as the linear sealing region where the main body packaging material is heat-welded with each other. A palm bag for a microwave oven according to item 1.   The height of the main body wrapping material is in the range of 100 mm to 250 mm, and the height of the bottom tape material folded in the lower portion is in the range of 80 mm to 150 mm. A palm-sized bag for a microwave oven as described.   The steaming part is composed of an unsealed part having a width of 1 mm to 3 mm provided on both sides or one side seal part of the lower part of the chuck part mechanism or a plurality of through holes having a diameter of 1 mm to 2 mm provided in the main body packaging material. 5. The palm bag for a microwave oven according to claim 1, wherein:

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