JP7306763B1 - Heat-generating laminate suitable for cold storage and heating device - Google Patents

Abstract

A heating device is provided which is a chemically exothermic laminate that generates thermal energy by utilizing the reaction between an exothermic agent and water, and that includes therein a laminate that can be easily and reliably operated to generate heat. A water bag containing water in a water impermeable and easily tearable bag, a heat generating agent bag containing a chemical exothermic agent that generates heat when it comes into contact with water, and a baglike container for the chemical exothermic agent are containers made of a water impermeable and easily tearable metal film. It is characterized in that it is wound so as to straddle the upper and lower sides of the water bag, and that the water contained in the water bag contains an anti-freezing agent. [Selection drawing] Fig. 3

Description

TECHNICAL FIELD The present invention relates to an exothermic laminate and a heating device suitable for cold storage, and in particular, to generating heat energy using a chemical reaction caused by mutual contact between an exothermic agent and water placed in close proximity. The present invention relates to a heat-generating laminate used for heating and particularly suitable for cooling storage, and to a heating apparatus containing the heat-generating laminate in a box.

In recent years, in order to heat various foods and beverages such as boxed lunches, cooked foods, emergency foods, sake, and warm water for infant milk preparation, heat is generated by a chemical reaction between granular or powdered exothermic agents and water. The use of heat generation systems that cause In other words, when it is difficult to use heating appliances that use combustible gas or electrical energy, such as when traveling or in the event of a disaster, food such as boxed lunches, cooked foods, emergency food, and baby milk A heating device in which an exothermic agent such as quicklime and water are separately stored in bags in advance and placed close to each other in a water-resistant container such as a dish when heating or heating beverages such as hot water for preparation. is prepared, and when necessary, heat energy is generated by placing the cooked food to be heated on the heating device and bringing the exothermic agent set in the heating device and water into contact with each other. It is a heat generation system that generates heat and uses the heat energy to perform desired heating or heating.

Various types of heating devices and heat-generating compositions that can be used to realize the above heat-generating system have been considered so far.
For example, Patent Literature 1 discloses that a heat generating bag containing a heat generating agent, a water bag containing water, and a support plate (plate) are laminated to form a laminated body, in which both the heat generating bag and the water bag are broken. Then, a string (breaking string) for cleaving is combined to form an integral set, and a heating container is disclosed in which this set is accommodated in the container. When using this heating container to heat boxed lunches or cooked foods, the boxed lunches or cooked foods are placed on the heating device, and when desired, the breaking string is pulled to open both the heating bag and the water bag. is broken and cleaved, and this cleavage operation brings the exothermic agent and water into physical contact, causing an exothermic reaction.
This patent document 1 describes a film made of a synthetic resin such as polyethylene as an example of the material of the bag containing the exothermic agent and water.

Patent Document 2 also discloses a heating device having a configuration similar to that of the heating device disclosed in Patent Document 1, and describes the use of an exothermic agent pack in which a non-woven fabric bag is filled with an exothermic agent as an exothermic agent bag. ing.

Patent Document 3 also discloses a heating device having a configuration similar to that of the heating device disclosed in Patent Document 1 and utilizing a similar chemical reaction. In this heating device, the exothermic agent residue scatters when the exothermic agent bag is ruptured and split, rises together with steam generated by the reaction between the exothermic agent and water, and easily causes contamination of the food material placed above. A protective sheet is placed on top of the heat generating device enclosure to prevent contact.

Patent Document 4 discloses a heat-generating laminate obtained by improving the heating device disclosed in Patent Document 1. The heat-generating agent bag includes a heat-generating agent inner bag in which the heat-generating agent is contained in a water-permeable bag body, and a support plate fixed to the heat-generating agent bag. The exothermic agent bag is composed of a moisture-resistant outer bag that accommodates the exothermic agent inner bag in an unevenly distributed state on one side along the two sides, and the exothermic agent in the moisture-resistant outer bag is cut at a position where the exothermic agent bag is cut by a tear string A configuration is disclosed that is set so as not to overlap with the position of the inner bag.

Japanese Patent Laid-Open No. 11-292155 JP 2007-275170 JP 2010-68846 JP 2018-42605

As can be seen from the description of the above prior art documents and the explanation so far, many of the known heating devices that utilize heat generated by chemical reaction contain a granular or powder exothermic agent in a water bag or a bag-like container. a heating agent bag and a support plate laminated in an arbitrary order, and further comprising a single breaking string stretched over the upper and lower surfaces of the heating agent bag and the water bag, respectively. It has a structure housed in a square dish-shaped box with an open top. Also, in order to facilitate breaking (cleavage) of the water bag and the exothermic agent bag, it has been common to form a laminate in which one side of each bag is fixed to the support plate.

However, it is known that the heating devices using various heat-generating laminates hitherto known have the following problems.
As described in Patent Document 1, in the exothermic agent bag in which a exothermic agent such as powdery or granular quicklime is enclosed in a synthetic resin film bag, a normal synthetic resin film bag exhibits moisture permeability, Deactivation of the exothermic agent contained in the bag due to moisture absorption progresses at an early stage, and a general exothermic agent bag has a short storage period of about one month in which the exothermic function can be maintained. For this reason, it tends to be insufficient as a heating device to be stored for the purpose of use in an emergency. In addition, when the water bag and the exothermic agent bag are broken at the same time by pulling the string, the force (pull In addition to force), a force is also required to untangle the lumps of the powder or granular exothermic agent packed in the exothermic agent bag. is likely to become difficult.

The exothermic agent pack described in Patent Document 2, in which an exothermic agent is contained in a bag made of non-woven fabric, has the same tendency.

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 detailed studies by the inventors of the present invention, In a configuration in which an exothermic agent is enclosed in a water-permeable inner bag, and the exothermic agent inner bag is accommodated in a moisture-resistant outer bag, the exothermic agent can be stored in an improved manner, but the exothermic agent inner bag is moisture-resistant. Because it is unevenly distributed on one side in the outer bag, the position at which the single breaking cord that is hung over the upper and lower surfaces of the exothermic agent bag and the water bag is limited. It has been found that it is not easy to break the exothermic agent bag and the water bag at the same time using the breaking string.

The inventors of the present invention conducted research with the aim of solving all of the above-mentioned various problems, and as a result, a heat generation method that improved the insufficient points appearing in the heat-generating laminate and the heating device having the configuration described in Patent Document 4. By using the heat-generating laminate and the heating apparatus having the configurations described below as the heat-generating laminate and the heating apparatus, we have found that many points can be remarkably improved, and have arrived at the invention described below. The invention was previously filed (on Aug. 4, 2022) as Japanese Patent Application No. 2022-124769.

The invention filed as Japanese Patent Application No. 2022-124769 is the invention of the following heating device and heat-generating laminate.
heating device
Inside a square dish-shaped box with an open top, a bag-shaped container contains a chemical exothermic agent that generates heat when the water comes into contact with a water bag that contains water in a water-impermeable and easily tearable bag. and a heating agent bag are fixed to the support plate in a state of being superimposed via a support plate having an opening interposed between the bags, one end of which is fixed to the support, The other end is wound around both the top and bottom surfaces of the water bag and around both the top and bottom surfaces of the exothermic agent bag, and then wound from the front of the box. A heating device comprising a heat-generating laminate to which a string for tearing the pulled-out water bag and exothermic agent bag is attached,
The bag-like container for the chemical exothermic agent is a container made of a water-impermeable and easily tearable metal film, and the chemical exothermic agent is divided into left and right sides via a blank area inside the bag-like container made of the metal film. 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.

A heat-generating laminate A water bag containing water in a water-impermeable and easily tearable bag and a heat-generating agent bag containing a chemical heat-generating agent that generates heat upon contact with water in a bag-like container. It is fixed to the support in a superimposed state via a support plate having an opening interposed therebetween, one end of which is fixed to the support plate, and the other end of which is a water bladder. a water bag wound around both the upper surface and the lower surface and around both the upper surface and the lower surface of the exothermic agent bag, and drawn out from one side of the support plate; A heat-generating laminate provided with a string for tearing a heat-generating agent bag,
The bag-like container for the chemical exothermic agent is a container made of a water-impermeable and easily tearable metal film, and the chemical exothermic agent is divided into left and right sides via a blank area inside the bag-like container made of the metal film. 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.

The inventors of the present invention have further studied the practicality of the heating device and the heat-generating laminate described in Japanese Patent Application No. 2022-124769. As a result of the investigation, it was found that although there are no particular problems with the practicability of the heating device and the heat-generating laminate, there are cases in which there is a need to improve their storage stability.

For example, the above-mentioned heating device or heat-generating laminate is used at gatherings, trips, banquets, etc. where many people gather and eat, or at restaurants, etc. In order to provide the heat-generating laminate in this state, it is desirable to prepare a large number of heating devices or heat-generating laminates in advance. A problem has been found in that the material tends to lose activity over time due to contact with moisture, such as humidity.

In order to solve the above problems, it is desirable to refrigerate (cool) the heating device and the heat-generating laminate. It was found that water used for heat generation tends to freeze during refrigeration, which limits the improvement of storage stability by refrigeration. As a result of considering the problems caused by such cold storage, the present inventor added an anti-freezing agent such as salt to the water placed inside the heat-generating laminate and accommodated in the water bag. Therefore, it was found that it is effective to prevent or suppress freezing.

Therefore, the inventions of the heating device and heat-generating laminate newly provided this time are the following inventions.
(1) Heating device
Inside a square dish-shaped box with an open top, a bag-shaped container contains a chemical exothermic agent that generates heat when the water comes into contact with a water bag that contains water in a water-impermeable and easily tearable bag. and a heating agent bag are fixed to the support plate in a state of being superimposed via a support plate having an opening interposed between the bags, one end of which is fixed to the support, The other end is wound around both the top and bottom surfaces of the water bag and around both the top and bottom surfaces of the exothermic agent bag, and then wound from the front of the box. A heating device comprising a heat-generating laminate to which a string for tearing the pulled-out water bag and exothermic agent bag is attached,
The bag-like container for the chemical exothermic agent is a container made of a water-impermeable and easily tearable metal film, and the chemical exothermic agent is divided into left and right sides via a blank area inside the bag-like container made of the metal film. and the string for tearing the water bag and exothermic agent bag is wound so as to straddle the upper and lower sides of the blank area. A heating device, characterized in that the contained water contains an anti-freezing agent.

(2) Exothermic laminate A water bag containing water in a water-impermeable and easily tearable bag and an exothermic agent bag containing a chemical exothermic agent that generates heat upon contact with water in a bag-like container, The bags are superimposed and fixed to a support via a support plate having an opening interposed between them, and one end is fixed to the support plate and the other end is fixed to the support plate. , around both the upper and lower surfaces of the water bag, and around the upper and lower surfaces of the exothermic agent bag, and are pulled out from one side of the support plate. A heat-generating laminate provided with a string for tearing the water bag and the exothermic agent bag,
The bag-like container for the chemical exothermic agent is a container made of a water-impermeable and easily tearable metal film, and the chemical exothermic agent is divided into left and right sides via a blank area inside the bag-like container made of the metal film. a string for tearing the water bag and exothermic agent bag is wound so as to straddle the upper and lower sides of the blank area; An exothermic laminate, characterized in that the contained water contains an anti-freezing agent.

Compared to conventional heat-generating laminates, the heat-generating laminate of the present invention is easier to operate for generating heat and furthermore has improved cooling storage stability. Convenience at the time of wearing is remarkably improved.

1 is a plan view (top view) of a heating device provided with a heat-generating laminate of the present invention; FIG. In order to facilitate understanding of the layer structure of the heat-generating laminate, the plan view is drawn with a part of the porous film attached to the upper surface of the heating device removed. In order to avoid complication, description of part of the string for tearing the water bag and exothermic agent bag is omitted. 2 is a cross-sectional view of the heating device shown in FIG. 1 as viewed from the right side; FIG. The cross section seen from the left side surface has substantially the same shape. FIG. 3 is a plan view (top view) for clarifying the location of an inner bag containing a heat generating agent arranged in divided regions accommodated in the heat generating agent bag of the heating device shown in FIG. 1 ; Note that this plan view is drawn with the heat generating agent bag partially cut away.

Next, the heat-generating 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 provided with the heat-generating laminate of the present invention.

The basic structure of the heating device 1 of the present invention is that a water impermeable and easy A water bag 3 containing water in a tearable bag and an exothermic agent bag 4 containing a chemical exothermic agent that generates heat upon contact with water in a bag-like container are provided with an opening interposed between the bags. One end is fixed to the support plate 5 and the other end is attached to both the upper surface and the lower surface of the water bag 3 . A string for tearing the water bag and the heat generating agent bag, which is wound around the front and rear of the heat generating agent bag and around both the upper surface and the lower surface of the heat generating agent bag, and is pulled out from the front side of the box body 2. A heating device comprising an exothermic laminate to which a body 5 is attached. The upper surface of the dish-shaped box 2 is usually covered with a porous plastic film in order to prevent the water bag 3 and exothermic agent bag 4 contained inside from falling off and to efficiently increase the thermal energy generated by the exothermic reaction. It is

The square dish-shaped box 2 with an open top for housing the heat-generating laminate of the present invention is preferably a synthetic resin water-resistant container generally used in conventional heating devices of the same type. However, the depth of the dish-shaped box is not particularly limited. Thick paper or corrugated cardboard with improved water resistance can also be used.
Further, it is preferable that a notch portion is formed in the edge portion along the opening surface of the box 2 so as to pull out the string (breaking string) 6 to the outside. However, this notch portion is not necessarily required, and instead of the notch portion, a hole may be provided in the front side surface (side wall) of the box 2 .

It is preferable to provide a concave portion or a V-shaped depressed portion on the bottom surface of the square dish-shaped box 2 in order to collect the water that diffuses to the bottom side of the box when the water bag is broken.

The water bag 3 and the exothermic agent bag 4 are fixed to the support plate 5 in an overlapping state via 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 heat generating bag with the rear edge of the support plate interposed therebetween. preferably.

The water contained in the water bag 3 may be ordinary tap water or industrial water, but it is necessary to add an anti-freezing agent such as salt or ethylene glycol to the water. The amount of the antifreezing agent to be added can be appropriately determined in consideration of the heat-generating laminate and the cooling conditions of the heating device. By way of example, the amount of antifreeze added to the water can be in the range of 5-30% by weight, especially in the range of 10-20% by weight. What is required is that the fluidity of water should not be greatly hindered by the cooling storage conditions such as the planned cooling storage temperature and cooling storage period.

As the exothermic agent, it is preferable to use a known quicklime or a highly exothermic exothermic agent obtained by adding an exothermic enhancer such as metallic aluminum powder to quicklime. The exothermic agent is generally used in the form of powder or granules, but may be formed in the form of fragments or plates.

The main structural features of the heat-generating laminate of 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; The chemical exothermic agent is housed inside the bag-shaped container made of metal film in a state divided into left and right via a blank area, and c) the string for tearing the water bag and the exothermic agent bag, The reason is that it 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 inside the bag-like container.

As a water-impermeable, easily-tearable metal film container containing an exothermic agent, a bag body is usually used, which is prepared by bonding the four edges of two sheet-like aluminum foils to each other. Then, the chemical exothermic agent to be incorporated into the exothermic laminate is preliminarily divided into substantially equal parts, each of which is packed in a water-permeable inner bag made of non-woven fabric or the like, and the chemical exothermic agent is water-impermeable and easily tearable. It is housed and arranged at the left and right positions inside a bag (outer bag) made of metal film. In this case, the "left and right" arrangement refers to the positional relationship between the left and right sides of the string so as not to overlap the string set in the heating device, and is based on the pulling direction of the string. Placement. Also, the left and right arrangement does not need to strictly match the direction in which the string is pulled.

FIG. 3 shows a representative example in which two inner bags (4a, 4b) are filled with exothermic agents, and a blank area is provided inside the outer bag 4 made of a metal film, and the heat generating agent is divided into left and right portions. It is a top view which shows positional relationship.

As can be understood from FIGS. 1 and 2, the heat-generating laminate 1 is usually housed in a dish-shaped water-resistant container 2 (the depth is not particularly limited, and synthetic resin, cardboard, etc. are used as the material). be done.

In the heat-generating laminate 1 housed in the dish-shaped water-resistant container 2, the water bag and exothermic agent bag are ruptured or split when the string 6 is pulled out or pulled out of the water-resistant container. , Water flows out from the water bag into the container, and it contacts with the exothermic agent exposed in the exothermic agent bag due to similar breakage and splitting, and heat generation, that is, the generation of thermal energy, begins, and then continuous heat generation is realized. .

As described above, in the exothermic agent bag used in the exothermic laminate of the present invention, the exothermic agent is a water-permeable inner bag in which the exothermic agent is enclosed in a water-permeable bag body such as a nonwoven fabric (the exothermic agent is made of a nonwoven fabric or the like). The exothermic agent pack itself contained in a water-permeable bag is commercially available as a constituent member of an exothermic laminate or as an exothermic agent pack for use for other purposes), and this exothermic agent inner bag is prepared. Moisture-resistant outer bag that is larger in size than the separately prepared inner bag of exothermic agent (a bag body in which permeation of water vapor is remarkably suppressed, for example, a metal layer is formed on the surface of a metal film or synthetic resin film by means of vapor deposition or the like) (having a formed configuration) are arranged approximately evenly on the left and right sides. It is preferable that the cutting position of the exothermic agent bag by the rupturing string be set so as not to overlap with any position of the exothermic agent inner bag 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 moisture-resistant outer bag of the water bag and the exothermic agent bag can be broken and split by pulling the breaking string 6. To easily and reliably realize even a relatively weak tensile force. In addition, if the exothermic agent that is divided into left and right is packed in an inner bag made of non-woven fabric or the like, even if the exothermic agent bag (outer bag 4) is broken or ruptured, the exothermic agent will not flow into the water-permeable bag. The exothermic agent inner bag does not break or open, and the exothermic agent is kept in the water-permeable bag. is unlikely to rise with the rise of . Therefore, contamination of the food to be heated by the exothermic agent residue, which tends to be a problem in conventional heating devices, can be effectively prevented.

1 Exothermic laminate 2 Square dish-shaped box with an open top 3 Water bag containing water containing antifreeze 4 Exothermic agent bag (outer bag)
4a Exothermic agent inner bag 4b Exothermic agent inner bag 5 Support plate 6 String for breaking

Claims (11)

Inside a square dish-shaped box with an open top, a bag-shaped container contains a chemical exothermic agent that generates heat when the water comes into contact with a water bag that contains water in a water-impermeable and easily tearable bag. exothermic agent bags are fixed to a support plate in a state of being stacked one on top of the other through a support plate having an opening interposed between the bags, and one end of the heat generating agent bag is connected to the support plate. It is fixed to a plate , and the other end is wound around both the upper and lower surfaces of the water bag and around the upper and lower surfaces of the exothermic agent bag. A heating device comprising a heat-generating laminate to which a string for tearing the water bag and exothermic agent bag drawn out from the front of the box is attached,
The bag-like container for the chemical exothermic agent is a container made of a water-impermeable and easily tearable metal film or a synthetic resin film having a metal layer formed on the surface , and the chemical exothermic agent is contained inside the bag-like container. Each of the chemical exothermic agents divided into left and right inside the bag-like container is contained in a water-permeable or water-soluble inner bag. 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; A heating device, characterized in that an antifreeze agent is contained in the water in which the heating is carried out. 2. The heating device according to claim 1 , wherein both inner bags containing the chemical exothermic agent are made of non-woven fabric . 2. The heating device according to claim 1, wherein the exothermic agent bag containing the chemical exothermic agent is made of aluminum foil. 2. The heating device of claim 1, wherein the chemical exothermic agent is a mixture of quicklime and metallic aluminum powder. 2. The heating device according to claim 1, wherein the water bag containing water is made of a plastic film having a metal vapor-deposited on its surface. 2. The heating device according to claim 1, wherein the dish-shaped box is made of plastic. A water bag containing water in a water-impermeable and easily tearable bag and an exothermic agent bag containing a chemical exothermic agent that generates heat upon contact with water in a bag-like container are interposed between the bags. It is fixed to the support plate in a stacked state from the top through the support plate provided with the opening, and further, one end is fixed to the support plate , and the other end is connected to the water The water bag is wound around both the upper and lower surfaces of the bag and around the upper and lower surfaces of the exothermic agent bag, and is pulled out from one side of the support plate. and a heat-generating laminate to which a string for tearing the exothermic agent bag is attached ,
The bag-like container for the chemical exothermic agent is a container made of a water-impermeable and easily tearable metal film or a synthetic resin film having a metal layer formed on the surface , and the chemical exothermic agent is contained inside the bag-like container. Each of the chemical exothermic agents divided into left and right inside the bag-like container is contained in a water-permeable or water-soluble inner bag. 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; An exothermic laminate, characterized in that an antifreeze agent is contained in the water in which the heat is applied. 8. The heat-generating laminate according to claim 7 , wherein both inner bags containing the chemical exothermic agent are made of non-woven fabric . An exothermic laminate according to claim 7, wherein the chemical exothermic agent is a mixture of quicklime and metallic aluminum powder. The heat-generating laminate according to claim 7, wherein the heat-generating agent bag containing the chemical heat-generating agent is made of aluminum foil. 8. The heat-generating laminate according to claim 7, wherein the water bag containing water is made of a plastic film having metal deposited on its surface.

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