KR101700854B1 - Double envelope for food packing - Google Patents

Abstract

The present invention relates to a double envelope for food packaging, and more particularly, to a double envelope in which an inner envelope is received inside an outer envelope and integrally formed by bonding, wherein the upper outer surface of the inner envelope is opened The inner surface of the inner envelope is provided with a fusing sheet so that the inner surfaces of the inner envelopes are fusion-bonded to each other to seal the inner surface of the inner envelopes. The present invention relates to a double envelope for food packaging, which facilitates the production of double envelopes.
In the double bag for food packaging according to the present invention, the left and right edges are joined while the two sheets are overlapped, the upper portion is opened, and the lower portion is joined with the left and right edges in the state where the closed outer envelope and two sheets are overlapped, The opening of the outer envelope is opened and closed by a zipper. The lower portion of the opening is closed and the contents are received in the inner envelope. Two outer edges of the upper edge of the sheet are heat- Wherein an inner envelope integrally joined to the inner envelope is integrally joined by thermal fusion between the outer envelope and the inner envelope so that the two inner surfaces of the inner envelope are not joined together by heat welding, And a non-fusible sheet is provided on the inner surface of the upper edge so that the upper and lower portions of the outer envelope Is applied to the one of heat and pressure to the inside direction is characterized in that formed.

Description

Double envelope for food packaging {DOUBLE ENVELOPE FOR FOOD PACKING}

The present invention relates to a double envelope for food packaging, and more particularly, to a double envelope in which an inner envelope is received inside an outer envelope and integrally formed by bonding, wherein the upper outer surface of the inner envelope is opened The inner surface of the inner envelope is provided with a fusing sheet so that the inner surfaces of the inner envelopes are fusion-bonded to each other to seal the inner surface of the inner envelopes. The present invention relates to a double envelope for food packaging, which facilitates the production of double envelopes.

The food culture of our country has a very high proportion of the food that is cooked from rice, which is a stock, to various stew and soup. For this reason, even when eating out in a variety of leisure activities mainly performed in the outdoors, a portable burner was used to cook food.

However, there are many places that prohibit the cooking of food using fire because of environmental protection and fire prevention such as mountains and parks, and there are many cases where food that does not require cooking using fire is needed to be prepared for outdoor activities.

In recent years, as people's living standards have improved, interest in health and leisure activities has increased, and outdoor activities such as mountain climbing, fishing, and sports have been increasingly available, so they can be purchased easily at convenience stores or marts. Demand for portable food such as ready-to-eat lunches, bread, sandwiches, and canned drinks is increasing.

However, the portable food described above can not be warmed up by using fire even when the weather is cold, so it has been inevitable to ingest it as it is in a cold state.

When such portable food is eaten as it is in a cold state, not only does it not feel the taste of the food properly, but some people also cause abdominal pain due to cold food.

In order to solve the above-mentioned problems, a portable food heating container has recently been developed, which can easily and safely heat and eat foods in the open air.

As an example, Korean Utility Model Publication No. 20-2010-0009406 (published on September 29, 2010) "Portable heating cooker" has been proposed.

The portable heating cooker of the related art has a structure in which a separate inner envelope, which can contain food, is housed in the outer envelope containing the exothermic agent and is integrally attached to the outer envelope.

In the portable heating cooker of the related art, the opening located at the upper portion of the outer envelope is closed by the zipper for opening and closing so that a closed heating chamber is formed in the outer envelope, and steam is discharged to the upper portion of the outer envelope So that it is prepared for the sudden pressure expansion due to the hydration reaction of the heat generating agent and water.

Conventionally, conventional heat-generating containers having the above-described conventional envelopes have a double structure in which inner envelopes are received in an outer envelope and are integrally attached to the outer envelopes as in the prior art.

That is, the inner envelope is accommodated in the outer envelope, and a space such as a heat generating chamber is formed between the outer envelope and the inner envelope so that the heat generating agent and water are accommodated in the receiving space, The inside of which is configured to warm the food.

On the other hand, since most of the portable food heat-generating vessels react with the exothermic agent by water to heat the foods to heat them, it is very important to prevent the exothermic agent, which may be harmful to the human body, from mixing with the food, It is important.

As described above, it is preferable that the heat-generating container made of the envelope having the double structure as described above is configured to separate the accommodating space for accommodating the exothermic material, that is, the food accommodating space of the heat-generating room and the inner envelope, The heat generating chamber and the food receiving space are separated from each other.

Such a double-structure envelope has a complicated structure and is manufactured through various steps. That is, since the production of the envelope is very difficult, it takes a lot of time and cost to manufacture the envelope.

Meanwhile, since the double-layered envelope is mainly made of a vinyl material, a heat-sealing method using heat and pressure is often used to bond the outer envelope with the inner envelope.

A conventional bonding process of bonding the outer envelope and the inner envelope using the above-described thermal welding method will be briefly described below.

First, a heat-generating material such as a heating agent and an aqueous solution bag is put in an outer envelope, and then an inner envelope is inserted thereon. Next, the inner surface of the outer envelope of one side is joined to the outer surface of the inner envelope by using a heat fusion machine, and the inner surface of the outer envelope of the other side is joined to the outer surface of the inner envelope, do.

Thus, in order to join the outer envelope and the inner envelope integrally, it is necessary to perform two steps of joining the inner surface of the outer envelope on one side and the outer surface of the inner envelope.

When the outer envelope and the outer envelope are integrally joined by using the conventional method, two or more heat-sealing processes are necessarily required, so that a considerable loss occurs in the time of manufacturing the envelope having a double structure, Since complicated mechanical devices are required to carry out the heat fusion process more than twice, it is also disadvantageous in that it requires a great deal of cost in providing the production facility.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a double envelope in which an inner envelope is received in an inner envelope and is integrally formed by joining, The upper inner surface of the inner envelope is bonded to the upper outer surface of the inner envelope so that the upper inner surfaces of the inner envelopes are fusion-bonded to each other to prevent the inner envelope from being sealed, The present invention provides a double envelope for food packaging, which facilitates the production of double envelopes by integrally joining the envelopes and the inner envelopes.

It is another object of the present invention to provide an air conditioner in which an inner envelope in which contents of food or the like are accommodated is integrally formed by being joined to the inside of an outer envelope and a heat generating agent and an aqueous solution envelope are provided in a heat generating space portion formed between the outer envelope and the inner envelope And a cutting means connected to one side of the aqueous solution envelope so as to cut the aqueous solution envelope is provided so that the user can easily heat and cook the food only by a simple operation of pulling the cutting means, So that it can be consumed.

It is a further object of the present invention to provide an air bag for a garment in which, in a packaged state, an outer envelope and an inner envelope are joined so that moisture in the air is not introduced into the inner bag, A part of the joint line between the outer envelope and the inner envelope is formed to form a steam outlet so that the moisture in the air is prevented from being in contact with the exothermic agent in the packaged state and the steam generated when the food is heated is discharged through the newly formed steam outlet So that the envelope can be prevented from being ruptured by the pressure of the steam.

In order to attain the above object, the double envelope for food packaging according to the present invention is characterized in that two sheets are overlapped and left and right edges are joined, and the upper part is opened, and the lower part is a state in which the closed outer envelope and two sheets are overlapped Wherein the upper opening is open and the opening is provided with an opening and closing zipper and the lower portion is closed so that the contents are received inside the upper portion of the outer envelope, Wherein the inner envelope is integrally joined to the inner surface of the two sheets by thermal fusion, and the outer envelope and the inner envelope are integrally joined to each other by thermal fusion, And a non-fusible sheet is provided on the inner surface of the upper edge of the inner envelope so that the non-fusible sheet is in contact with the non- Is a single heat and pressure to the inside direction on both sides of the upper outer surface of the outer envelope is characterized in that applied on the formed.

The double envelope for food packaging according to the present invention may further comprise a heat absorbing member accommodated in a heat generating space formed between the outer envelope and the inner envelope and reacting with the aqueous solution to generate heat, Further comprising an aqueous solution bag containing an aqueous solution to be reacted and cutting means connected to one side of the aqueous solution bag to cut the aqueous solution bag while being pulled by an external force, To the first bonding line.

In addition, the aqueous solution envelope of the double envelope for food packaging according to the present invention is characterized in that a skirt for joining to the inner surface of the outer envelope is formed at one side edge thereof, and a skirt for joining to the inner surface of the outer envelope is formed on one side of the skirt in the longitudinal direction And a cut-out piece cut in a predetermined width is formed.

The double envelope for food packaging according to the present invention is characterized in that a connecting hole is formed at a central portion of the cut-off piece so that one end of the cut-out means is inserted and connected, and the cut-out means is formed in a stick shape having a predetermined length, A pair of latching pieces are formed on both sides in the width direction of the one end so as to prevent one end from being pulled out from the connection hole when the other end is pulled in a state where the one end is inserted into the hole, And the other end is provided with an elliptical pulling ring having a pointed end so that the user can easily pull the finger therebetween.

Further, the pulling ring of the double bag for food packaging according to the present invention may be configured such that a part of the pulling ring of the second envelope for food packaging is exposed to the upper openings formed between the upper end of the outer envelope and the open / close zipper of the inner envelope, And is integrally joined to the inside of the pulling ring along the second joining line by thermal fusion in a state that the joining lines are arranged on the joining line.

Further, in the double bag for food packaging according to the present invention, when pulling a part of the pulling ring exposed to the upper hollow portion, the inner joining portion of the pulling ring of the second joining line is separated and steam generated during the exothermic reaction And a steam outlet for discharging the steam.

According to the above-described structure, the double envelope for food packaging according to the present invention comprises a double envelope in which an inner envelope is received in an outer envelope and integrally formed by bonding, wherein the upper outer surface of the inner envelope is opened The inner surface of the inner envelope is provided with a fusing sheet so that the inner surfaces of the inner envelopes are fusion-bonded to each other to seal the inner surface of the inner envelopes. So that it is possible to easily manufacture an envelope having a double structure.

In the double envelope for food packaging according to the present invention, an inner envelope in which the content of food or the like is received is inserted into the outer envelope and is integrally formed by bonding. In the heat-generating space portion formed between the outer envelope and the inner envelope, The aqueous solution bag does not need to be supplied with a separate aqueous solution for reacting with the exothermic agent and is provided with cutting means connected to one side of the aqueous solution envelope so as to cut off the aqueous solution envelope, Can be easily heated, cooked and ingested.

In addition, in the double wrapper for food packaging according to the present invention, the outer envelope and the inner envelope are joined so that moisture in the air does not flow into the inner envelope in the packaged state, so that the heat generating space portion is kept in a hermetically sealed state. A part of the joint line between the outer envelope and the inner envelope is dropped to form a steam outlet so that moisture in the air is prevented from coming into contact with the exothermic agent in the packaged state and when the food is heated, It is possible to prevent the envelope from being ruptured by the pressure of the steam.

FIG. 1 and FIG. 2 are cross-sectional views illustrating a process of joining an outer envelope and an inner envelope in a conventional double envelope manufacturing process
Fig. 3 is an external perspective view of a double bag for food packaging according to the first embodiment of the present invention. Fig.
4 is a schematic cross-sectional view taken along line B-B '
FIG. 5 is a cross-sectional view illustrating a process of joining an outer envelope and an inner envelope of a double envelope for food packaging according to a first embodiment of the present invention,
6 is a front view of a double envelope for food packaging according to a second embodiment of the present invention
7 is a cross-sectional view of a double envelope for food packaging according to a second embodiment of the present invention
Fig. 8 is an external perspective view showing a state in which the double bag for food packaging shown in Fig. 6 is cut along the incision groove; Fig.
FIG. 9 is a schematic view showing a process of cutting an aqueous solution bag and a process of forming a steam outlet of a double envelope for food packaging according to a second embodiment of the present invention
10 is a schematic view showing a process of combining the aqueous solution envelope and the cutting means of the double envelope for food packaging according to the second embodiment of the present invention.
11 is a schematic sectional view taken along the line D-D 'in Fig. 8 (a)

Hereinafter, a double bag for food packaging according to the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 3 is a perspective view of a double envelope for food packaging according to a first embodiment of the present invention, FIG. 4 is a schematic cross-sectional view taken along line B-B 'of FIG. 3, FIG. 2 is a reference view showing the process of bonding the outer envelope and the inner envelope during the construction and manufacture of the double envelope for packaging.

The present invention provides a double envelope in which an inner envelope (20) is housed in an outer envelope (10) and is integrally formed by joining, the outer envelope (10) The non-fusible sheet S is provided on the inner surface of the upper portion of the inner envelope 20 so as to prevent the inner surface of the inner envelopes 20 from being fused with each other to seal the inner surface of the inner envelopes 20 by heat- The outer envelope 10 and the inner envelope 20 are integrally joined to each other by a single heat-sealing process, thereby making it possible to easily produce an envelope having a double structure.

3 to 5, the double envelope for food packaging according to the first embodiment of the present invention includes an outer envelope 10, an inner envelope 20, and a fusing sheet S. [

The outer envelope 10 has a structure in which the inner envelope 20 is accommodated therein and in which two sheets 11a and 11b are overlapped and the left and right edges are joined together and the upper portion is opened and the lower portion is closed .

The outer envelope (10) may be constructed such that the inner envelope (20) and other contents are accommodated therein, and the upper end thereof is finally joined to seal the inner envelope (20).

The outer envelope 10 may be made of a heat-resistant vinyl material to prevent deformation due to heat.

In the first embodiment of the present invention, the outer envelope 10 is composed of two sheets 11a and 11b, the left and right edges of which are joined, and the lower sheet 12 is attached to the lower ends of the two sheets 11a and 11b And the upper part is closed, and the inner surface of the upper end edge, which is not shown in the figure but is opened when the inner envelope 20 and other contents are contained therein, is joined by heat fusion, .

The outer envelope 10 may be folded to reduce the volume of the entire upper envelope 10 when the envelope 10 is distributed and stored and may be used to unfold the lower envelope 12 when in use, .

The inner envelope 20 is integrally joined to the outer envelope 10 while being accommodated in the outer envelope 10 and has two sheets 21a and 21b, The upper and lower openings are provided with the opening and closing zipper 22 and the lower portion thereof is closed so that the contents can be received therein.

The open / close zipper 22 is configured to close the opening of the inner envelope 20.

5, the outer edge of the upper edge of the two sheets 21a and 21b is received by the two outer edges of the outer envelope 10 in the state of being accommodated in the outer envelope 10, And are integrally joined to the inner surface of the upper portion of the sheet 11a 11b by thermal fusion.

Like the outer envelope 10, the inner envelope 20 may be made of a heat resistant vinyl material to prevent deformation by heat.

As in the first embodiment of the present invention, the inner envelope 20 is formed in such a manner that one sheet 21 formed in a lengthwise direction much longer than the width direction is folded in half and the two sheets 21a and 21b are overlapped The upper portion is opened and the lower portion is closed, and the opening and closing zipper 22 is provided in the upper opening of the opened portion so that the inside can be closed or opened.

In the meantime, in the first embodiment of the present invention, the inner envelope 20 is formed in a folded structure in which the lower end folded in half is pushed in from the outside to the inner edge to a certain depth so that the folded portion of the lower end is opened, Lt; / RTI >

The fused sheet (S) is a key constituent that has the most important technical features of the double envelope for food packaging according to the present invention.

5, in the process of joining the outer envelope 10 and the inner envelope 20 together to form an integral body, the upper inner surfaces of the inner envelope 20 are fusion-bonded to each other It prevents the suturing.

When the inner envelope 20 is integrally joined to the outer envelope 10 by thermal fusion, the inner surface of the two sheets 21a and 21b of the inner envelope 20 is heat- And is provided on the inner surface of the upper edge of the inner envelope 20 so as not to be joined by fusion.

That is, in the state that the non-fusible sheet S is provided on the inner surface of the upper edge of the inner envelope 20, the outer envelope 10 and the inner envelope 20 are joined together by thermal fusion.

The inner envelope 20 and the inner envelope 20 are integrally joined to each other by thermal fusion so that the inner surfaces of the two sheets 21a and 21b of the inner envelope 20 are opened The non-fusible sheet S is provided on the inner surface of the upper edge of the inner envelope 20 so as not to be joined by fusing so that the outer envelopes 10 This is done by applying one heat and pressure in the inner direction.

Since the non-fusible sheet S is provided on the inner surface of the upper edge of the inner envelope 20, the outer envelope 10 and the inner envelope 20 can be integrally joined with each other only by one heat fusion process will be.

That is, the non-fusible sheet S makes it possible to greatly simplify the manufacturing process in manufacturing an envelope having a double structure.

The fused sheet S is made of a material having a higher melting temperature than the sheet 11 of the outer envelope 10 and the sheet 21 of the inner envelope 20.

The non-fusible sheet S has a sheet or film-shaped member having a higher temperature than the sheet 11 of the outer envelope 10 and the sheet 21 of the inner envelope 20, As shown in FIG.

The non-fusible sheet S may be formed of a material having a higher melting temperature than the sheet 11 of the outer envelope 10 and the sheet 21 of the inner envelope 20, Or may be applied on the inner surface of the edge.

In the double envelope for food packaging according to the present invention, the non-fusible sheet (S) is manufactured by forming a cell sheet which is initially manufactured in a large size in order to make a sheet 21 of the inner envelope (20) As shown in FIG.

That is, the non-fused sheet S is provided at a predetermined position in the state of the battery sheet before cutting, and then the non-fused sheet S is placed on the upper edge of the inner surface of the inner envelope 20, The sheet 21 of the inner envelope 20 is cut to a predetermined size.

Hereinafter, with reference to the drawings, an advantage that the double-sealed food envelope according to the present invention has by having the structure of the non-fused sheet S will be described in comparison with a conventional double-structure envelope making method.

A method of joining an outer envelope and an inner envelope integrally in a conventional double envelope manufacturing process will be briefly described as follows.

1, after inserting the inner envelope 200 into the outer envelope 100, the inner envelope 200 is inserted into the outer envelope 100 using a heat sealing machine HD as shown in FIG. 1 (a) So that the inner surface of the outer envelope 100 and the outer surface of the inner envelope 200 are thermally fused to each other. 1B, when the inner surface of the outer envelope 100 and the outer surface of the inner envelope 200 are thermally fused, the outer envelope 100 and the inner envelope 200 are integrally formed A bonded double-structure envelope is made.

2, after inserting the inner envelope 400 into the outer envelope 300, the inner envelope 400 is inserted into the inner envelope 300, (P) is inserted between the inner surfaces of the inner envelopes (400). 2 (b), the inner surface of the outer envelope 300 and the inner surface of the inner envelope 400 are pressed together in the inner direction from both outer surfaces of the outer envelope 300, A part of the outer surface is bonded by heat fusion. As shown in FIG. 2 (c), when the heat seal prevention plate member P is retracted between the inner surfaces of the inner envelope 400, the outer envelope 300 and the inner envelope 400 are integrally formed A bonded double-structure envelope is made.

As described above, the conventional two methods must be manufactured in various stages in order to integrally join the outer envelopes 100, 300 and the inner envelopes 200, 400.

That is, in order to join the outer envelope 100 and the inner envelope 200, the first method is to heat the inner envelope 100 and the inner envelope 200 to one side and the other side, The process is absolutely necessary.

The second method includes a step of inserting a plate member for preventing fusion of the inner surface of the inner envelope 400 to bond the outer envelope 300 with the inner envelope 400, And then a step of removing the plate member is added.

As described above, the conventional manufacturing methods are complicated in manufacturing the envelope of the double structure, resulting in a loss in time and cost. In addition, since complicated mechanical devices are required for the two thermal fusing processes or the plate member inserting process, there is a disadvantage that a large amount of manufacturing equipment is required.

The process of joining the outer envelope 10 and the inner envelope 20 together in the process of manufacturing the double envelope for food packaging according to the present invention will be briefly described with reference to FIG.

As shown in FIG. 5, the double envelope for food packaging according to the present invention first inserts the inner envelope 20 into the outer envelope 10. 5 (a) and 5 (b), heat and pressure are applied to the outer envelope 10 from both outer sides of the outer envelope 10 in the inner direction using a heat fusion machine HD, The inner surface and a part of the outer surface of the inner envelope 20 are thermally fused to each other. This completes the process of integrally joining the outer envelope 10 and the inner envelope 20 of the double envelope for food packaging according to the present invention.

That is, since the double envelope for food packaging according to the present invention is provided with the fused sheet S on the inner surface of the upper edge of the inner envelope 20, the outer envelope 10 and the inner envelope (20) can be integrally joined.

As described above, the double bag for food packaging according to the present invention has been developed in order to overcome the problems of the conventional method for manufacturing an envelope having a double structure as described above. By simplifying the manufacturing process of the double bag structure, The loss can be minimized.

Hereinafter, a double bag for food packaging according to a first embodiment of the present invention is described, and a double bag for food packaging according to a second embodiment of the present invention will be described below.

Meanwhile, the double envelope for food packaging according to the first embodiment of the present invention is particularly useful when applied to an exothermic bag for instant cooking, which can be easily consumed with warm food in the outdoors without using a separate cooking device to be.

That is, the double envelope for food packaging according to the present invention has a double structure in which an inner envelope (20) in which food is received is inserted into the outer envelope (10) and integrally joined together, and the outer envelope (10) The heat generating space portion 13 is formed between the heating space portion 13 and the heating member 30 and the aqueous solution envelope 40 are enclosed in the heat generating space portion 13. The heat generating agent 30 reacts with the aqueous solution to generate heat, And it is mainly applied to an exothermic cooking bag for cooking food (F) inside the envelope (20).

Therefore, in the second embodiment of the present invention, the heating envelope 30, the aqueous solution envelope 40, and the cutting means 50 are further included in the double envelope for food packaging according to the first embodiment of the present invention, And it is configured to be used as a heating bag for heat.

FIG. 6 is a front view of a double envelope for food packaging according to a second embodiment of the present invention, FIG. 7 is a sectional view of a double envelope for food packaging according to a second embodiment of the present invention, FIG. 9 is a schematic view showing a process of cutting a double envelope for food packaging according to a second embodiment of the present invention and a process of forming an aqueous solution bag and a process of forming a steam discharge port. FIG. FIG. 10 is a schematic view showing a process of combining the aqueous solution bag and the cut-out means of the double bag for food packaging according to the second embodiment of the present invention, FIG. 11 is a schematic sectional view taken along the line D-D ' to be.

6 to 11, the double envelope for food packaging according to the second embodiment of the present invention includes an outer envelope 10, an inner envelope 20, a non-fusion sheet S, a heat generating agent 30, an aqueous solution envelope 40 ), And cutting means (50).

The double envelope for food packaging according to the second embodiment of the present invention is configured such that a steam outlet 60 is formed by a user pulling the cut-out means 50 to heat and cook the food F .

In the second embodiment of the present invention, the outer envelope 10, the inner envelope 20, and the non-fusible sheet S have the same configuration as that of the first embodiment of the present invention, Hereinafter, the heat generating agent 30, the aqueous solution envelope 40, the cutting means 50, and the steam outlet 60, which are not included in the first embodiment of the present invention, will be described in detail.

The outer envelope 10 has a structure in which the contents are accommodated in the outer envelope 10, and the left and right edges are joined while the two sheets 11a and 11b are overlapped, the upper portion is opened, and the lower portion is closed.

In the second embodiment of the present invention, the outer envelope 10 has a structure in which an upper portion is opened, and the inner envelope 20, the heat generating agent 30, the aqueous solution envelope 40 and the cut- The inner surface of the edge of the opened upper end portion is joined by heat fusion and the inside is sealed.

6, when the upper end of the outer envelope 10 is joined to seal the inner envelope 10, the outer envelope 10 can be easily opened and closed by the user The outer envelope 10 may be provided with a cutout groove 15 so as to be opposed to each other in the inward direction on both side edges of the upper end of the outer envelope 10.

The aqueous solution envelope 40 is bonded to one side of the inner surface of the outer envelope 10 along the first bonding line L1.

In the second embodiment of the present invention, the inner envelope (20) accommodates food (F) capable of being instantly cooked therein.

In addition, the inner envelope 20 may be formed in a folded structure in which the folded lower end is pushed to a certain depth from the outside to the inner fold, and if necessary, the folded portion of the lower end is unfolded to have a bottom face of a predetermined area, When the food F is consumed, the lower end portion of the inner envelope 20 can be unfolded to widen the inner space, thereby facilitating the ingestion of the food F.

The inner envelope 20 is connected to the outer envelope 10 in a state of being accommodated in the outer envelope 10 to form a heat generating space 13 between the inner envelope 20 and the outer envelope 10, ).

That is, in the second embodiment of the present invention, when the inner envelope 20 is accommodated in the outer envelope 10, the outer surface of the upper edge of the inner envelope 20 on both sides of the outer envelope 10 And the heat generating space portion 13 is formed by being joined to the inner surface and integrated therewith.

It is preferable that the heat generating space portion 13 maintains the closed state because the moisture in the air flowing into the heat generating space portion 13 is blocked during circulation and storage, So as not to cause it.

In the meantime, the heat generating agent 30, the aqueous solution envelope 40 and the cutting means 50 are accommodated in the heat generating space portion 13.

11, in the second embodiment of the present invention, the outer envelope 10 and the inner envelope 20 are formed by overlapping two sheets 11a and 11b, 21a and 21b, respectively, The four sheets 11a, 11b, 21a and 21b constituting the outer envelope 10 and the inner envelope 20 have the same length in the width direction and the two sheets 21a and 21b of the inner envelope 20 The left and right edges of the four sheets 11a, 11b, 21a and 21b are interposed between the two sheets 11a and 11b of the outer envelope 10, 4 junction line L4. This is a method of further simplifying the manufacturing process of the double bag for food packaging according to the present invention as well as integrating the outer envelope 10 and the inner envelope 20 as described above.

The heat generating agent 30 is accommodated in the heat generating space part 13 formed between the outer envelope 10 and the inner envelope 20 and reacts with the aqueous solution to generate heat. A heat generating agent made of quicklime powder may be used.

The heating agent 30 may be formed in the form of a heating element pack stacked with a nonwoven fabric such as a nonwoven fabric.

The aqueous solution envelope 40 is accommodated in the heat generating space portion 13 formed between the outer envelope 10 and the inner envelope 20 and includes an aqueous solution containing therein an aqueous solution And is formed by being packed in a packing material made of a vinyl material.

It is preferable that the aqueous solution envelope 40 has a certain degree of durability so that the packaging paper is blown by the external force generated during circulation and storage and the aqueous solution does not flow out.

On the other hand, the aqueous solution contained in the aqueous solution envelope 40 may be pure water only, and a catalyst may be added to the pure water to further enhance the reaction effect with the heat generating agent 30.

As shown in FIG. 7, the aqueous solution envelope 40 is bonded and fixed to the inner surface of the outer envelope 10 along one side of the first bonding line L1. At this time, it is preferable that the bonding method is bonded by heat fusion.

Since the aqueous solution envelope 40 is bonded to the inner surface of the outer envelope 10 and is fixed without moving, when the user pulls the cutout means 50 to be described later, the aqueous solution envelope 40 is easily cut.

A skirt 41 for joining the inner surface of the outer envelope 10 is formed at one side edge of the aqueous solution envelope 40. The inner surface of the skirt 41 is formed so as to facilitate cutting of the aqueous solution envelope 40, A cut-out piece 42 cut in a predetermined width is formed on one side in the longitudinal direction of the cutter.

The skirt 41 is formed for the purpose of ensuring a sufficient bonding surface and length for bonding the aqueous solution envelope 40 to the inner surface of the outer envelope 10 and at the same time for forming the cut- And is formed for the purpose of securing space.

The cut-out piece 42 is connected to one end of the cut-out means 50 and is configured such that when the user pulls the cut-out means 50, the aqueous solution bag 40 can be easily cut.

As shown in FIG. 6, the cut pieces 42 are formed in a shape of '└┘' having a predetermined width. The cut pieces 42 are formed so that both ends of the cut-out are directed toward the inside of the aqueous solution bag 40 do.

On the other hand, a connection hole 43 is formed at a central portion of the cut-out piece 42 to connect one end of the cut-out means 50 to the other end.

The cut-out means (50) has a configuration in which one end is connected to one side of the aqueous solution bag (40) and pulled by an external force to cut the aqueous solution bag (40) At one end thereof, a latching piece 51 and a fixing protrusion 52 are formed, and at the other end thereof, a pulling ring 53 is provided.

The cutting means 50 is preferably made of a material having elasticity capable of changing its shape by an external force. In the second embodiment of the present invention, the cutting means 50 is made of a synthetic resin material capable of elastic deformation.

The engaging piece 51 is formed at one end of the cut-off means 50. When the one end of the cut-out means 50 is inserted into the connection hole 43 and connected to the other end, Is formed on both sides in the width direction of one end so as not to be detached from the connection hole.

In the second embodiment of the present invention, as shown in FIGS. 6 and 10, one end of the cut-off means 50 in which the latching pieces 51 are formed is formed in a "?" Shape.

The fixing protrusions 52 are spaced apart from the locking pieces 51 by a predetermined distance so as to fix the position of one end in a state where one end of the cutout means 50 is inserted into the connection hole 43, do.

6, the fixing protrusions 52 are spaced from one end of the cut-out means 50 in which the engaging pieces 51 are formed at regular intervals in the other end direction, And the distal end is formed to be inclined downward toward the latching piece 51.

The one end of the cutting means 50 can be kept fixed at a predetermined position without falling in the direction opposite to the direction in which the cutting means 50 is inserted by the fixing projections 52. [

That is, in a state where one end of the cutting means 50 is installed in the connection hole 43, the holding member 51 and the fixing protrusion 52 maintain the fixed state without falling in any direction.

The pulling ring 53 is provided at the other end of the cutting means 50. The pulling ring 53 is formed in a ring shape so that the user can easily pull the finger by pulling the finger, and has an oval shape with a sharp top.

The pulling ring 53 is made of a material having elasticity capable of changing its shape by an external force. The second embodiment of the present invention is made of a synthetic resin material capable of elastic deformation.

As shown in FIG. 6, since the pulling ring 53 is formed in the shape of an elliptical ring as a whole, when the material is made of a synthetic resin material, a predetermined elastic deformation is possible.

6, a part of the pulling ring 53 is configured to be exposed to the upper hollow portion 14 formed between the upper end of the outer envelope 10 and the opening and closing zipper of the inner envelope 20 . With the above-described pulling rim 53 constructed as described above, the position of the pulling ring 53 can be easily grasped by use, and the pulling ring 53 can be easily pulled by pulling the finger.

The pulling ring 53 is disposed on the second joining line L2 on which the outer envelope 10 and the upper portion of the inner envelope 20 are joined, And are integrally joined together by thermal fusion along the second bonding line (L2). By this bonding, a part of the pulling ring 53 is exposed to the upper hollow portion 14, and at the same time, the heat generating space portion 13 can maintain the sealed state.

In addition, since the pulling ring 53 is fixed to the specified position by being joined as described above, it is possible to solve the drawback that the pulling string of the string type, which has been mainly used as the conventional pulling means, .

The cutting means 50 constructed as described above is inserted into the connection hole 43 formed in the cut-off piece 42 and is coupled to the aqueous solution bag 40.

Referring to FIG. 10, the process of combining the aqueous solution envelope 40 and the cut-out means 50 will be briefly described below.

First, one end of the long shaft of the pulling ring 53 is inserted into the connecting hole 43, and the pulling ring 53 is pushed until it passes completely.

10 (b), since the one end of the long axis of the pulling ring 53 is formed to be sharp, the diameter of the pulling ring 53 is smaller than the length of the short axis of the pulling ring 53, The pulling ring 53 can be easily inserted into the hole 43 and the pulling ring 53 is made of a material capable of being elastically deformed and formed into a thin oval shape as a whole so that the pulling ring 53 is elastically deformed, The inner space of the connecting hole 43 is narrowed and can pass through the connecting hole 43.

In this state, the user pulls the finger to the pulling ring 53 and pulls the finger until the hooking piece 51 is hooked on the heat hole 43 after passing through the fixing protrusion 52, .

In this way, the coupling of the slitting means (50) and the aqueous solution bag (40) is completed.

In this state, as shown in FIG. 10 (c), the fixing protrusions 52 protruding downwardly can maintain the fixed state without falling in the opposite direction in which the cut-out means 50 is fitted.

In the double bag for food packaging according to the second embodiment of the present invention, the steam outlet 60 for discharging the steam generated during the exothermic reaction is not normally formed, that is, at the time of distribution and storage, The steam discharge port 60 is formed when the pulling ring 53 is pulled.

8 and 9, when the pulling ring 53, which is partially exposed by the upper hollow portion 14, is pulled out, the steam outlet 60 of the second joint line L2 And the inner joining portion of the pulling ring 53 is separated.

In other words, the steam outlet 60 is formed between the inner surface of the upper one side of the outer envelope 10 and the outer surface of the upper side of the upper side of the inner envelope 20 while the pulling ring 53 is interposed therebetween, L2 so that the heat generating space portion 13 is kept in a hermetically closed state and the pulling ring 53 is pulled so that the inner space of the pulling ring 53 of the second joining line L2 So that a small vapor discharge passage is formed therebetween.

Hereinafter, referring to the drawings, the use state of the double bag for food packaging according to the second embodiment of the present invention will be briefly described.

8 (a), when the user cuts the upper part of the outer envelope 10 along the incision groove 15 formed in the upper part of the outer envelope 10, The opening and closing zipper 22 of the inner envelope 20 and a part of the pulling ring 53 exposed above the second joining line L2 are visible.

In this state, the open / close zipper 22 of the inner envelope 20 is opened to mix the dried food F and the appropriate water into the inner envelope 20, and then the open / close zipper 22 is tightened again, Lt; / RTI >

Thereafter, as shown in Fig. 9 (a), when the user pulls the finger on the pulling ring 53 exposed above the second bonding line L2, The aqueous solution bag 40 is broken along the cut-off piece 42 connected to one end of the cut-off means 50. The aqueous solution contained in the aqueous solution bag 40 flows out of the heat- So that an exothermic reaction is generated, and high-temperature heat is immediately generated. And the food F contained in the inner envelope 20 is heated and cooked by the heat of the high temperature.

At this time, the outer envelope 10 may be rapidly expanded due to the steam generated by the instantaneous heat generated during the exothermic reaction. However, the outer envelope 10 has durability to withstand the expansion pressure due to the characteristics of the material constituting the outer envelope 10 The steam discharge port 60 formed by separating a part of the second joint line L2 by pulling the pulling ring 53 as shown in Figs. 8 (b) and 9 (b) Since the steam is discharged little by little, the problem such as the blowing of the outer envelope 10 does not occur.

The double bag for food packaging according to the second embodiment of the present invention having the above structure can be manufactured such that the food F is packaged and sold together or the double bag can be sold without the food F, The heating element 30 and the aqueous solution envelope 40 are accommodated together with the heating element 30 so that the function of the heating element 30 is exposed to external moisture so that the function of the heating element 30 is not degraded or reacted. It can be easily cooked by heating.

The steam generated at the time of cooking the food F can be drawn into the steam outlet 50 formed between the outer envelope 10 and the inner envelope 20 by pulling the pulling ring 53 of the cut- It is possible to prevent the envelope from being ruptured by the pressure of the steam, so that the user can safely use it.

The double bag for food packaging described above and shown in the drawings is only an embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

10 outer envelope
11 sheets
12 lower seat
13 Heating space part
14 upper punch
15 incision home
20 inner envelopes
21 sheet
22 opening and closing zipper
S nonfused sheet
30 Heating agent
40 aqueous solution envelope
41 skirts
42 cuttings
43 connecting ball
50 Cutting means
51 latch
52 Fixing projection
53 Pulling ring
60 steam outlet
L1 first junction line
L2 second junction line
L3 third junction line
L4 fourth junction line
F Food

Claims (6)

The left and right edges are joined with the two sheets overlapped, the upper portion is opened, and the lower portion is a closed outer envelope; The upper and lower openings are opened and closed with a zipper and the lower portion is closed so that the contents are accommodated in the inside of the outer envelope, An inner envelope in which an outer edge of the edge is integrally joined to the outer envelope by thermal fusion to inner surfaces of two sheets of the outer envelope; Including,
A heating member accommodated in a heat generating space formed between the outer envelope and the inner envelope, the heat generating member reacting with the aqueous solution to generate heat; An aqueous solution bag accommodated in the heat generating space portion and containing an aqueous solution for reacting the exothermic agent therein; Cutting means for cutting the aqueous solution bag while one end thereof is connected to one side of the aqueous solution bag and pulled by an external force; Further included,
Wherein the aqueous solution envelope has a skirt extending to one side edge of the outer envelope so as to be joined to the inner surface of the outer envelope and formed with a cut-out piece having a predetermined width on one side of the skirt in the longitudinal direction thereof,
The cut piece has a connecting hole formed at a central portion thereof to be connected to one end of the cut-
Wherein the cut-out means is formed in a stick shape having a predetermined length, and when the other end is pulled in a state where one end portion is inserted into the connection hole, a catching piece is formed on both widthwise sides of the one end portion, A fixing protrusion is formed at both sides in the width direction at a predetermined distance from the engaging piece so as to fix the position of the one end in a state where one end is inserted into the connection hole and the other end is formed into an elliptical shape with a pointed end Characterized in that a double-sided bag for food packaging is provided. The method according to claim 1,
Wherein the aqueous solution envelope has one side edge bonded to the inner surface of the outer envelope along a first bonding line. delete delete 3. The method according to claim 1 or 2,
Wherein the pulling ring is disposed on a second joint line in which the outer envelope and the inner envelope are joined such that a part of the pulling ring is exposed to an upper hollow portion formed between an upper end portion of the outer envelope and an opening and closing zipper of the inner envelope, Wherein the first and second bonding lines are integrally joined to each other by heat fusion to the inside of the ring along the second bonding line. 6. The method of claim 5,
Characterized in that when the part of the pulling ring exposed to the upper hollow portion is pulled out, a steam outlet for discharging the steam generated in the exothermic reaction while the inner joining portion of the pulling ring is separated from the second joining line is formed Double envelopes for packing.

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