JP7396745B1 - Heating device and heating method equipped with exothermic laminate - Google Patents

Abstract

[Problem] A chemical exothermic laminate that generates thermal energy by using a reaction between an exothermic agent and water, the laminate having an easy and reliable operation for generating heat, and a heating device equipped with the laminate inside. A method of heating an object using an apparatus is provided. [Solution] A water bag formed by storing water in a rectangular dish-shaped box body and a heat generating agent bag 4 in which a bag-like container houses a chemical heat generating agent that generates heat upon contact with water are supported in a stacked state. It is fixed to the board, and is further wrapped around the front and back of both the upper and lower surfaces of the water bag, and the front and back of both the upper and lower surfaces of the exothermic agent bag, and then wrapped around the box body. This is a heating device equipped with a heat generating laminate to which a string for tearing the water bag and heat generating agent bag is attached which is pulled out from the front. By pulling the part and pulling it out to the front of the box body and tearing the water bag and the exothermic agent bag, heat is generated and the object to be heated is heated. [Selection diagram] Figure 3

Description

The present invention relates to a method of heating an object to be heated using a novel exothermic laminate or heating device. The present invention also relates to improved exothermic laminates and heating devices. More specifically, the present invention is based on two patent applications (Japanese Patent Application No. 2022-124769 and Japanese Patent Application No. 2022-124769 and Patent Application No. Application No. 2022-156316, your patent application No. 2022-124769 has already been granted a patent based on the amended claims). The present invention also relates to methods for heating objects to be heated, and improvements to the exothermic laminates or heating devices disclosed in those patent applications.

In recent years, heat generation has been developed due to the chemical reaction between granular or powdered exothermic agents and water to heat or warm various foods and beverages such as bento boxes, cooked foods, emergency rations, Japanese sake, and hot water for preparing infant milk. Progress is being made in the use of heat generation systems to generate conditions. In other words, in situations where it is difficult to use heating equipment that uses flammable gas or electrical energy, such as while traveling or in the event of a disaster, food items such as bento boxes, pre-cooked foods, emergency rations, and infant milk may be used. When you want to heat or heat a beverage, such as hot water, you can store water and a heat-generating agent, such as quicklime, that generates heat when it comes into contact with water, separately in a bag and place it in a water-resistant container such as a dish. Prepare a heating device with each placed close to each other, and when necessary, place the cooked food to be heated on top of the heating device, and then heat the exothermic agent and water set in the heating device. This is a heat generating system that generates thermal energy by bringing the two into contact with each other, and uses that thermal energy to achieve desired heating.

Various types of heating devices and exothermic compositions that can be used to realize the above exothermic system have been considered so far.
To give an example, first of all, Patent Document 1 discloses that a heat-generating bag containing a heat-generating agent, a water bag containing water, and a support plate (plate) are stacked on top of each other. A heating container is disclosed in which strings (breaking strings) for breaking and tearing both sides of the bag are combined to form an integrated set, and this set is housed in the container. When heating bento boxes, cooked foods, etc. using this heating container, place the item (object to be heated) that requires heat treatment, such as the bento box or cooked foods, on top of the heating device, and break it at the desired time. By pulling the string, both the exothermic bag and the water bag are ruptured almost simultaneously, and this tearing operation brings the exothermic agent and water into physical contact, causing an exothermic reaction.
This Patent Document 1 describes a film made of synthetic resin such as polyethylene as an example of a material for a bag that contains a heat generating agent and water.

Patent Document 2 also discloses a heating device having a similar configuration to the heating device disclosed in Patent Document 1, and describes the use of a heat generating agent pack in which a nonwoven fabric bag is filled with a heat generating agent as the heat generating agent bag. ing.

Patent Document 3 also discloses a heating device that has a similar configuration to the heating device disclosed in Patent Document 1 and utilizes a similar chemical reaction. In addition, in this heating device, food products with heat-generating agent residues tend to scatter when the heat-generating agent bag breaks and ruptures, and rise together with water vapor generated by the reaction between the heat-generating agent and water, causing contamination of the food items placed above. A protective sheet is placed on the top of the heat generating device container to prevent contact with the heat generating device.

Patent Document 4 describes a heat generating laminate that is an improved heating device disclosed in Patent Document 1, and includes a heat generating agent bag, a heat generating agent inner bag in which a heat generating agent is encapsulated in a water permeable bag body, and a heat generating agent bag fixed to a support plate. It consists of a moisture-resistant outer bag that accommodates the exothermic agent inner bag unevenly distributed along one side, and the position where the exothermic agent bag is cut by the tearing string is the exothermic agent inside the moisture-resistant outer bag. A configuration is disclosed in which the position is set so as not to overlap with the position of the inner bag.

JP 11-292155 JP2007-275170 JP2010-68846 JP2018-42605

As can be seen from the descriptions of the above-mentioned prior art documents and the previous explanations, most of the heating devices that utilize heat generated by a known chemical reaction contain a granular or powdery exothermic agent in a water bag or bag-like container. A heat-generating laminate is constructed in which a heat-generating agent bag and a support plate are laminated in an arbitrary order, and a breaking string is strung across the upper and lower surfaces of each of the heat-generating agent bag and the water bag. It has a structure housed in a square dish-shaped box with an open top. Further, in order to easily break (cleave) the water bag and the exothermic agent bag, it has also been common to form a laminate in which one side of each bag is fixed to a support plate.

However, it is known that the heating devices that utilize various heat generating laminates that have been known so far have the following problems.
As described in Patent Document 1, in a heat generating agent bag in which a heat generating agent such as powdered or granular quicklime is encapsulated in a synthetic resin film bag, a normal synthetic resin film bag exhibits moisture permeability. The exothermic agent contained in the bag quickly loses its activity due to moisture absorption, and a typical exothermic agent bag can only maintain its exothermic function for a short storage period of about one month. Therefore, as a heating device stored for the purpose of use in an emergency, maintenance of activity is likely to be insufficient. In addition, when the water bag and the exothermic agent bag are simultaneously broken and torn by pulling the string, the force (pulling In addition to this, force is also required to loosen the lumps of powder or granular heat-generating agent packed in the heat-generating bag and clumped together due to moisture absorption, etc., which is difficult for elderly people, children, etc. who do not have strong physical strength. There is a problem in that it tends to be difficult to reliably pull the breaking string.

The exothermic agent pack described in Patent Document 2, in which the exothermic agent is housed in a bag made of nonwoven fabric, has a similar tendency, and the heat generating device described in Patent Document 3 also has similar problems.

The heating device described in Patent Document 4 was provided as an improved device of the heating devices described in Patent Documents 1 to 3, but according to the detailed study of the inventor of the present invention regarding the practical operation process. In the configuration described in Patent Document 4, in which a heat-generating agent is encapsulated in a water-permeable inner bag and the heat-generating agent inner bag is housed in a moisture-resistant outer bag, although the storage stability of the heat-generating agent is improved, Since the inner agent bag is unevenly distributed on one side of the moisture-resistant outer bag, the position of the single breaking string that is stretched between the upper and lower surfaces of the exothermic agent bag and the water bag, respectively. It has been found that a problem arises in that it is difficult to simultaneously break the heating agent bag and the water bag using the breaking string.

As a result of continuing research aimed at solving all of the above-mentioned problems related to known heating devices, the inventor of the present invention discovered a heat-generating laminate having the structure described in Patent Document 4, which exhibits particularly excellent practical performance. By using the exothermic laminate and heating device having the configurations described below, many points can be significantly improved. is discovered first.
Regarding this invention, the inventor filed an application and filed an application for accelerated examination on August 4, 2022. As a result of this application being examined as Japanese Patent Application No. 2022-124769, a notice of reasons for refusal was first issued, and then procedures for amending the scope of claims were carried out by the applicant. Thereafter, a grant of patent was issued based on the amended claims.

The invention filed as the above patent application No. 2022-124769 (the invention stated in the independent claim of the claims before amendment) is the invention of the following heating device and exothermic laminate.
(1) Heating device
Inside a square dish-shaped box with an open top, a water bag is made of a water-impermeable, easily tearable bag containing water, and a chemical exothermic agent that generates heat when it comes into contact with water is housed in a bag-like container. The exothermic agent bags are stacked and fixed to the support plate with a support plate having an opening interposed between the bags, and one end is fixed to the support plate (= support plate). ), and the other end is wrapped around both the upper and lower surfaces of the water bag, and around both the upper and lower surfaces of the heating agent bag, and then A heating device comprising a heat-generating laminate to which a water bag pulled out from the front of a box body and a string for tearing a heat-generating agent bag are attached,
The bag-like container for the chemical heat generating agent is a water-impermeable and easily tearable metal film container, and the chemical heat generating agent is divided into left and right sides through a blank area inside the metal film bag-like container. and a string for tearing the water bag and the exothermic agent bag is wound so as to straddle the upper and lower sides of the blank area. heating device.

(2) A water bag made of a water-generating laminate containing water in a water-impermeable and easily tearable bag, and a heat-generating agent bag containing a chemical exothermic agent that generates heat upon contact with water in a bag-like container, The bags are fixed to a support in an overlapping state via a support plate having an opening interposed between the bags, and further, one end is fixed to the support plate and the other end is fixed to the support body. , wrapped around the front and back of both the upper and lower surfaces of the water bag, and the front and back of both the upper and lower surfaces of the heating agent bag, and then pulled out from one side of the support plate. A heat generating laminate comprising a string for tearing a water bag and a heat generating agent bag,
The bag-like container for the chemical heat generating agent is a water-impermeable and easily tearable metal film container, and the chemical heat generating agent is divided into left and right sides through a blank area inside the metal film bag-like container. and a string for tearing the water bag and the exothermic agent bag is wound so as to straddle the upper and lower sides of the blank area. Exothermic laminate.

In addition, after the amendment procedure was carried out in the above-mentioned patent application 2022-124769, each claim in the amended scope of claims for which a grant of patent was issued (for dependent claims, the main claim should be considered as the above claim) The inventions described in ) are as follows.

(Claim 1)
A water bag is formed by storing water in a water-impermeable and easily tearable bag inside a square dish-shaped box with an open top, and a chemical exothermic agent that generates heat when it comes into contact with water is stored in the bag-like container. The exothermic agent bags are fixed to the support plate in a stacked state from above through a support plate having an opening interposed between the bags, and further, one end is fixed to the support plate in a stacked state from above. and the other end is wrapped around the front and back of both the upper and lower surfaces of the water bag and the front and back of both the upper and lower surfaces of the heating agent bag, and then A heating device comprising a heat generating laminate to which a string for tearing a water bag pulled out from the front of the body and a heat generating agent bag is attached,
The bag-like container for the chemical heating agent is made of a water-impermeable and easily tearable metal film or a synthetic resin film with a metal layer formed on the surface, and the chemical heating agent is inside the bag-like container. The chemical exothermic agent divided left and right inside the bag-like container is housed in a state where it is divided into left and right sides through a blank area, and each of the chemical exothermic agents divided left and right inside the bag-like container is placed in a water-permeable or water-soluble inner bag. and a string for tearing the water bag and the heating agent bag is wound so as to straddle the upper and lower sides of the blank area.
(Claim 2) The heating device according to the above-mentioned Item 1, wherein both of the inner bags containing the chemical exothermic agent are made of nonwoven fabric.
(Claim 3) The heating device according to Claim 1, wherein the exothermic bag containing the chemical exothermic agent is made of aluminum foil.
(Claim 4) The heating device according to Claim 1, wherein the chemical exothermic agent is a mixture of quicklime and metal aluminum powder.
(Claim 5) The heating device according to Claim 1, wherein the water bag containing water is made of a plastic film with metal vapor-deposited on the surface.
(Claim 6) The heating device according to Claim 1, wherein the dish-shaped box is made of plastic.
(Claim 7) A water bag comprising water contained in a water-impermeable and easily tearable bag and a heat generating agent bag comprising a chemical exothermic agent that generates heat upon contact with water contained in a bag-like container. They are fixed to the support plate in a stacked state from above through a support plate with an opening interposed between the bags, and one end is fixed to the support plate and the other end is fixed to the support plate in a stacked state from above. is wrapped around both the upper and lower surfaces of the water bag, and around both the upper and lower surfaces of the heating agent bag, and then pulled out from one side of the support plate. A heat-generating laminate comprising a water bag and a string for tearing the heat-generating agent bag, the bag-like container for the chemical heat-generating agent being water-impermeable and easily tearable. It is a container made of a metal film or a synthetic resin film with a metal layer formed on the surface, and the chemical exothermic agent is housed inside the bag-like container divided into left and right sides with a blank area. In particular, each of the chemical exothermic agents divided left and right inside the bag-like container is housed in a water-permeable or water-soluble inner bag, and there is a separate inner bag for tearing the water bag and the exothermic agent bag. A heat generating laminate characterized in that a string is wound so as to straddle the upper and lower sides of the blank area.
(Claim 8) The heat-generating laminate according to the above-mentioned Item 7, wherein each of the inner bags containing the chemical heating agent is made of non-woven fabric.
(Claim 9) The exothermic laminate according to Item 7, wherein the chemical exothermic agent is a mixture of quicklime and metal aluminum powder.
(Claim 10) The exothermic laminate according to Item 7, wherein the exothermic bag containing the chemical exothermic agent is made of aluminum foil.
(Claim 11) The exothermic laminate according to Item 7, wherein the water bag containing water is made of a plastic film with metal vapor-deposited on the surface.

What is submitted in this application is the following description using the heating device or exothermic laminate described in each claim of the amended claims for which a patent was granted after the amendment procedure in Japanese Patent Application No. 2022-124769. This is an invention of a method for heating an object to be heated.

(1) A bag-shaped container containing a chemical exothermic agent that generates heat when it comes into contact with a water bag made of a water-impermeable and easily tearable bag containing water inside a square dish-shaped box with an open top. The heat generating agent bags housed in It is fixed to the support plate, and the other end is wound around both the upper and lower surfaces of the water bag, and around both the upper and lower surfaces of the exothermic agent bag, and then , preparing a heating device equipped with a heat-generating laminate to which a string for tearing the water bag and the heat-generating agent bag pulled out from the front of the box body is attached;
The bag-like container for the chemical heating agent is made of a water-impermeable and easily tearable metal film or a synthetic resin film with a metal layer formed on the surface, and the chemical heating agent is inside the bag-like container. The chemical exothermic agent divided left and right inside the bag-like container is housed in a state where it is divided into left and right sides through a blank area, and each of the chemical exothermic agents divided left and right inside the bag-like container is placed in a water-permeable or water-soluble inner bag. The string for tearing the water bag and heat generating agent bag is wrapped around the upper and lower sides of the blank area. Place the object, then pull the front part of the string for tearing the water bag and exothermic agent bag, pull it out to the front of the box, and tear the water bag and exothermic agent bag. A method for heating an object to be heated, characterized by heating the object by causing heat generation.
(2) A heating method using the heating device described above, in which both inner bags containing the chemical heating agent are made of nonwoven fabric.
(3) A heating method using the heating device described above, in which the exothermic bag containing the chemical exothermic agent is made of aluminum foil.
(4) A heating method using the heating device described above, in which the chemical exothermic agent is a mixture of quicklime and metal aluminum powder.
(5) A heating method using the heating device described above, in which the water bag containing water is made of a plastic film with metal vapor-deposited on its surface.
(6) A heating method using the above heating device in which the dish-shaped box is made of plastic.
(7) A water bag made of a water-impermeable and easily tearable bag containing water, and a heat-generating bag made of a bag-like container containing a chemical heat-generating agent that generates heat upon contact with water. They are fixed to the support plate in a stacked state from above through a support plate with an opening interposed therebetween, and further, one end is fixed to the support plate, and the other end is The water is wrapped around the front and rear sides of both the top and bottom surfaces of the water bag and the front and back around both the top and bottom surfaces of the exothermic bag, and is drawn out from one side of the support plate. A heat-generating laminate comprising a heat-generating laminate to which a bag and a string for tearing the heat-generating agent bag are attached; It is a container made of film or synthetic resin film with a metal layer formed on the surface, and the chemical exothermic agent is housed inside the bag-like container divided into left and right sides with a blank area, Each of the chemical exothermic agents divided into left and right parts inside the bag-like container is housed in a water-permeable or water-soluble inner bag, and a string for tearing the water bag and the exothermic agent bag is provided. The object to be heated is placed on the top surface of the heat-generating laminate that is wound so as to straddle the upper and lower sides of the blank area, and then a A heating object that is characterized by generating heat and heating the object by pulling the front part of the string and pulling it out to the front of the laminate (see arrow) and tearing the water bag and the exothermic agent bag. How to heat things. .
(8) A heating method using the above exothermic laminate, in which both of the inner bags containing the chemical exothermic agent are made of nonwoven fabric.
(9) A heating method using an exothermic laminate in which the chemical exothermic agent is a mixture of quicklime and metal aluminum powder.
(10) A heating method using an exothermic laminate in which the exothermic bag containing the chemical exothermic agent is made of aluminum foil.
(11) A heating method using a heat-generating laminate in which the water bag containing water is made of a plastic film with metal vapor-deposited on the surface.

As mentioned above, the inventor of the present invention has further studied the practicality of the heating device and the heat-generating laminate described in the above-mentioned Japanese Patent Application No. 2022-124769. Although there are no particular problems with the practicality of the laminates, it has been found that there are cases in which there are problems with heat generation operations and storage stability, and there are cases where there is room for improvement.

For example, it may not be easy to tear apart the water bag and heat generating agent bag by pulling out the string.

Another example is that it is not easy to control the rate of heat generation that occurs due to contact with exposed surfaces within the exothermic agent bag at about the same time as the water is allowed to flow freely due to withdrawal of the string.

Another example is that it is not easy to control the heat generated by pulling out the cord and the rate at which the high-temperature water vapor generated by the heat dissipates from the top surface of the box.

The inventors of the present invention have found that it is effective to improve any one or all of the following measures as an additional improvement to the above-mentioned problems.

(1) At least one of the water bag and the exothermic agent bag is provided with a cut or a V-shaped notch at the intended tearing position to facilitate tearing.
(2) Regarding the heating device, a porous plastic sheet is attached to the top of the box to enable control of the rate of dissipation of high-temperature water vapor from the top of the box.

The operation of heating an object to be heated using the exothermic laminate or heating device of the present invention is easier than the conventional exothermic laminates or heating devices, and the operation for generating heat is easier. Improvements that are extremely advantageous in practical terms, such as improvements in various types of convenience, are realized.

FIG. 1 is a plan view (top view) of a heating device equipped with a heat generating laminate of the present invention. In order to facilitate understanding of the layer structure of the heat-generating laminate, the diagram is drawn as a plan view with a portion of the porous film attached to the top surface of the heating device removed. In addition, to avoid complexity, a part of the string for tearing the water bag and heat generating agent bag has been omitted. FIG. 2 is a sectional view of the heating device shown in FIG. 1 viewed from the right side. The cross section seen from the left side also has approximately the same shape. FIG. 2 is a plan view (top view) illustrating the location of the inner bag containing the exothermic agent, which is arranged in divided areas and accommodated in the exothermic agent bag of the heating device shown in FIG. 1; Note that this plan view is drawn with the exothermic agent bag partially cut away.

Next, a method for heating an object to be heated using the exothermic laminate and heating device of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a plan view (top view) of a heating device equipped with a heat generating laminate according to the present invention.

The basic configuration of the heating device 1 used in the present invention is similar to the heating devices using chemical exothermic agents known up to now. A water bag 3, which is an easily tearable bag containing water, and a heat generating agent bag 4, which is a bag-shaped container containing a chemical exothermic agent that generates heat when it comes into contact with water, open an opening between the bags. They are arranged on the support plate 5 in an overlapping state via the support plate 5 provided, one end is fixed to the support plate 5, and the other end is attached to the upper and lower surfaces of the water bag 3. It is wrapped around both sides of the water bag and the exothermic agent bag, and is wound around the front and back of both the upper and lower surfaces of the exothermic agent bag, and is pulled out from the front side of the box body 2 for tearing the water bag and the exothermic agent bag. This heating device includes a heat generating laminate to which a string 5 is attached. Note that the upper surface of the dish-shaped box 2 is usually covered with a porous plastic film that is effective for preventing the water bag 3 and exothermic agent bag 4 housed inside from falling off, and for efficiently increasing the thermal energy generated by the exothermic reaction. Preferably, it is covered by

The rectangular dish-shaped box 2 with an open top that houses the exothermic laminate of the present invention is preferably a water-resistant container made of synthetic resin that is commonly used in conventional heating devices of the same type. However, even though it is a dish-shaped box, there is no particular limitation on its depth. Additionally, cardboard or cardboard with increased water resistance can also be used.
Further, it is preferable that a cutout portion for pulling out the string (breaking string) 6 to the outside is preferably formed at the edge along the opening surface of the box body 2. However, this notch is not necessarily required, and instead of the notch, a hole may be provided on the front side surface (side wall) of the box body 2.

It is preferable to provide a recess or a V-shaped depression on the bottom of the rectangular dish-shaped box 2 in order to collect water that diffuses to the bottom of the box when the water bag breaks.

The water bag 3 and the exothermic agent bag 4 are fixed to the support plate 5 in an overlapping state with a support plate 5 having an opening interposed between the bags. The water bag 3 and the exothermic agent bag 4 are fixed by joining and fixing the rear edge of the water bag 3 and the rear edge of the exothermic bag by sandwiching the rear edge of the support plate. It is preferable to do so.

The water contained in the water bag 3 may be ordinary tap water or industrial water, but it is preferable to add an antifreeze agent such as salt or ethylene glycol to the water. The amount of the antifreeze agent added can be appropriately determined in consideration of the cooling conditions of the exothermic laminate and the heating device. By way of example, the amount of antifreeze added to the water can be in the range from 5 to 30% by weight, especially in the range from 10 to 20% by weight. What is required is that the fluidity of the water is not significantly impeded under the planned chilled storage conditions, such as the planned chilled storage temperature and chilled storage period.

As the exothermic agent, it is preferable to use known quicklime or a strongly exothermic exothermic agent prepared by adding a heat generating enhancer such as metal aluminum powder to quicklime. The exothermic agent is usually in the form of a known powder or granules, but it may also be in the form of pieces or plates.

The main structural features of the heating device or exothermic laminate used in the present invention are: a) the bag-like container for the chemical exothermic agent is made of a water-impermeable and easily tearable metal film container; , b) The chemical exothermic agent is housed inside the metal film bag-like container divided into left and right sides with a blank area, and c) A container for tearing the water bag and the exothermic agent bag. The string is wound so as to straddle the upper and lower sides of the blank area.
The above-mentioned blank area is provided at a position where the chemical exothermic agent corresponds approximately to the center within the bag-like container.

As a water-impermeable, easily tearable metal film container containing a heat generating agent, a bag made by joining each of the four edges of two sheets of aluminum foil is usually used. The chemical exothermic agent to be incorporated into the exothermic laminate is divided into approximately equal parts in advance, each portion is packed in a water-permeable inner bag made of non-woven fabric, etc., and the chemical exothermic agent is water-impermeable and easily tearable. It is housed in the left and right positions inside the metal film bag (outer bag). In addition, the "left and right" arrangement in this case refers to the positional relationship between the left and right sides of the string so that they do not overlap with the string set in the heating device, and is based on the direction in which the string is pulled. It is the arrangement. Further, the left and right arrangement does not need to strictly match the pulling direction of the string.

FIG. 3 shows a typical example in which the exothermic agent is packed into each of two inner bags (4a, 4b) and separated left and right with a blank area provided inside the outer bag 4 made of metal film. FIG. 3 is a plan view showing the positional relationship.

As can be understood from FIGS. 1 and 2, the heat-generating laminate 1 is usually housed in a dish-shaped (there is no particular limit to the depth, and materials such as synthetic resin or cardboard can be used) a water-resistant container 2. be done.

In the heat-generating laminate 1 housed in the dish-shaped water-resistant container 2, the water bag and the heat-generating agent bag are broken or torn, which occurs when the string 6 is pulled out or pulled out to the front side of the water-resistant container. , Water flows out from the water bag into the container, contacts the exothermic agent exposed in the exothermic agent bag due to similar breakage and rupture, and begins to generate heat, that is, thermal energy, and then continuous heat generation is realized. .

As mentioned above, the exothermic agent bag used in the exothermic laminate of the present invention is a water permeable inner bag in which the exothermic agent is encapsulated in a water permeable bag body such as a non-woven fabric. The heat-generating agent pack itself enclosed in a water-permeable bag is commercially available as a component of a heat-generating laminate or as a heat-generating pack for other purposes. A moisture-resistant outer bag that is larger in size than a separately prepared heat-generating agent inner bag (a bag body in which water vapor transmission is significantly suppressed; for example, a metal layer is formed on the surface of a metal film or synthetic resin film by means such as vapor deposition). (having a formed configuration) are placed approximately equally on the left and right sides. Note that it is preferable to set the cutting position of the exothermic agent bag by the breaking string so that it does not overlap with the position of any of the exothermic agent inner bags arranged in the moisture-resistant outer bag.

By configuring the exothermic agent bag of the exothermic laminate 1 as shown in FIGS. 1 to 3, the water bag and the moisture-resistant outer bag of the exothermic agent bag can be broken and torn by pulling the breaking string 6. can be easily and reliably realized even with a relatively weak tensile force. In addition, if the exothermic agents arranged on the left and right are each packed in an inner bag made of non-woven fabric, even if the exothermic agent bag (outer bag 4) breaks or rips, the exothermic agent will be transferred to the water-permeable bag. The exothermic agent inner bag does not break or rupture, and the exothermic agent remains encapsulated in the water-permeable bag, preventing the exothermic agent from scattering to the outside of the water-permeable bag or causing water vapor. It is unlikely that a rise will occur as a result of a rise in . Therefore, contamination of the food to be heated due to exothermic agent residue, which tends to be a problem with conventional heating devices, is effectively prevented.

1 Heat-generating laminate 2 Square dish-shaped box with an open top 3 Water bag 4 Heat-generating agent bag (outer bag)
4a Heat generating agent inner bag 4b Heat generating agent inner bag 5 Support plate 6 Breaking string arrow (→) Pulling direction of breaking string

Claims (2)

A water bag is formed by storing water in a water-impermeable and easily tearable bag inside a square dish-shaped box with an open top, and a chemical exothermic agent that generates heat when it comes into contact with water is stored in the bag-like container. The exothermic agent bags are fixed to the support plate in a stacked state from above through a support plate having an opening interposed between the bags, and further, one end is fixed to the support plate in a stacked state from above. and the other end is wrapped around the front and back of both the upper and lower surfaces of the water bag and the front and back of both the upper and lower surfaces of the heating agent bag, and then A heating device comprising a heat generating laminate to which a string for tearing a water bag pulled out from the front of the body and a heat generating agent bag is attached,
The bag-like container for the chemical heating agent is made of a water-impermeable and easily tearable metal film or a synthetic resin film with a metal layer formed on the surface, and the chemical heating agent is inside the bag-like container. The chemical exothermic agent divided left and right inside the bag-like container is housed in a state where it is divided into left and right sides through a blank area, and each of the chemical exothermic agents divided left and right inside the bag-like container is placed in a water-permeable or water-soluble inner bag. The above-mentioned string for tearing the water bag and exothermic bag is wound so as to span the upper and lower sides of the blank area , and is further wrapped around the upper and lower sides of the blank area. A heating device has a porous plastic sheet attached to it . Place the object to be heated on the top surface of the box of the heating device according to claim 1, and then pull the front part of the string for tearing the water bag and the exothermic bag to the front of the box, A method for heating an object to be heated, characterized in that the object to be heated is heated by causing an exothermic reaction by tearing a water bag and a heating agent bag .

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