JP2010011753A - Portable food - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable food having an easy structure and a low cost, free from becoming bulky, easy to store and carry, and capable of being heated only by unsealing and pouring water when eating and drinking. <P>SOLUTION: This portable food 1 is obtained by holding a food 3 and an exothermic agent pack 4 which is made by sealing an exothermic agent in a water permeable bag, in a container 2 followed by hermetically sealing. The exothermic agent reacts to water poured after unsealing the container 2 when eating and drinking, and generates heat to heat the food 3. The food 3 is heated by hermetically sealing the container 2. The exothermic agent contains granular or powdery calcium oxide and a composition comprising a neutralizer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable food that can heat and keep a cooked food at any time regardless of place and time.

  Conventionally, it has been known to combine a predetermined heating container and a carried food. For example, Japanese Patent Application Laid-Open No. 59-131317 (Patent Document 1) discloses a container having a predetermined shape in which a heating element is housed. Has been. In use, food is stored directly in a heating container, or a container such as a cup is stored to heat the food.

  In addition, Japanese Utility Model Publication No. 5-13326 (Patent Document 2) shows a heating pack in which a heating element is housed in a pack body that can be opened and closed. It is stored and heated.

In Japanese Patent No. 3467729 (Patent Document 3), a heating agent pack in which a heating agent is packaged is accommodated together with a water pack in a heating tray that opens to the upper surface, and the upper opening edge of the heating tray is provided with a protective sheet. A heating unit that is heat-sealed together with a tear tape that simultaneously cleaves the water pack and the protective sheet is disclosed.
JP 59-131317 A Japanese Utility Model Publication No. 5-13326 Japanese Patent No. 3467729

  Patent document 1 distinguishes a heating agent and food, and the structure of a heating container is complicated and requires manufacturing costs. Moreover, in patent document 2, the heating pack and the food to be heated are separate, and the upper part of the pack must be opened to store and heat the desired food during eating and drinking, which is troublesome to handle. Moreover, in patent document 3, it is a structure which accommodates a heat generating agent pack and a water pack in distinction from food, the structure of the tray for heat generation is complicated, and it takes a manufacturing cost. There are problems such as increased weight.

  The present invention has been made in view of such circumstances, has a simple structure, is low in cost, is not bulky, is easy to store and transport, and heats food simply by opening and injecting water during eating and drinking. It aims to provide portable food that can be.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a portable food in which a food and a heat-generating agent pack in which the heat-generating agent is sealed in a water-permeable bag are housed in a container and sealed.
The portable food is characterized in that the food is heated when the exothermic agent reacts with water injected by opening the container at the time of eating and drinking to generate heat.

  The invention according to claim 2 is the portable food according to claim 1, wherein the container is sealed and the food is heated.

  The invention according to claim 3 is characterized in that the exothermic agent includes a composition comprising granular or powdered quicklime and a neutralizing agent, according to claim 1 or claim 2. It is food.

The invention according to claim 4 is configured such that the water-permeable bag is made of a water-permeable woven or non-woven fabric containing weldable fibers,
The welded part formed by welding the woven fabric or the nonwoven fabric is composed of an outer part located in the outer shell, and an inner part located in the inner shell adjacent to the outer shell part,
The inner portion can be peeled off by the vapor pressure generated by the heat generated by the heat generating agent, and at least a part of the outer portion is not peelable, so that the inside and outside of the water-permeable bag cannot be communicated. It is characterized by it, It is a portable foodstuff of Claim 1.

  The invention according to claim 5 is the portable food according to claim 4, wherein the welding force of the outer shell part is set to be stronger than the welding force of the inner shell part.

  The invention according to claim 6 is the portable food according to claim 4, wherein the welding force of the outer portion is set to be gradually stronger than the welding force of the inner portion.

Invention of Claim 7 is comprised by the water-permeable woven fabric or nonwoven fabric in which the said water-permeable bag contains weldable fiber,
The welded part formed by welding the woven fabric or the nonwoven fabrics can be partly peeled off by the vapor pressure generated by the heat generated by the heat generating agent, and part of the welded part cannot be peeled off. Thus, the portable food according to claim 1, wherein the inside and outside of the water-permeable bag are configured so as not to communicate with each other.

  The invention according to claim 8 is the portable food according to claim 7, wherein the part of the welding force that cannot be peeled is set stronger than the part of the welding force that can be peeled off. is there.

  With the above configuration, the present invention has the following effects.

  In the invention according to claim 1, before eating or drinking, the food and the heat-generating agent pack are housed together in a container and sealed, and the container has a special structure for distinguishing between the food and the heat-generating agent pack, or the heat-generating agent. There is no need to provide a structure for setting the pack, etc., a simple structure, low cost, no bulk, and easy storage and transportation. When eating and drinking, if you open the container and inject water, the exothermic agent in the exothermic pack reacts with the water and generates heat, and by simply injecting water, the food is heated and easily edible, making it easy to carry food anytime, anywhere Can eat.

  In invention of Claim 2, a container can be made into a sealed state and a foodstuff can be heated in a short time.

  In the invention according to claim 3, the exothermic agent includes a composition comprising granular or powdered quicklime and a neutralizing agent, and heat is generated simply by injecting water to heat the food and easily enter an edible state. can do.

  In the invention according to claim 4, the water used for heat generation by the heat generation of the heat generating agent is vaporized to become water vapor, and the generation of water vapor generates the vapor pressure. Try to spread. This vapor pressure energy peels off the inner part constituting the welding part. Corresponding energy is consumed to peel off the inner portion, but the vapor pressure energy is reduced by the consumed amount. Moreover, when the volume of the water-permeable bag increases with the peeling of the inner part, the vapor pressure decreases. Furthermore, a part of the water vapor flows out of the water-permeable bag through the woven or non-woven fabric. Steam outflow is also a factor in reducing steam pressure. The reduced vapor pressure energy works in the direction of peeling the outer part, but it is not large enough to peel the outer part. As a result, a part or the whole of the outer portion remains without being peeled off, thereby effectively preventing communication between the inside and outside of the water-permeable bag, that is, tearing of the water-permeable bag. In some cases, some unseparated parts may remain in the inner part and some peeling may occur in the outer part due to variations in welding force based on the degree of welding and the level of vapor pressure (a little water vapor generation amount). It is assumed that such a case is within the scope of the present invention. In other words, the part that intentionally peels off is the inner part, and if it is originally not intended to be peeled off, preliminary peeling is performed when the vapor pressure cannot be suppressed only by peeling the inner part. A site | part is an outline part, and the communication inside and outside a water-permeable bag should just be prevented finally.

  In the invention according to claim 5, by setting the welding force of the outer portion more strongly than the welding force of the inner portion, when the vapor pressure generated by the heat generated by the heat generating agent acts on the water permeable bag, the vapor pressure The inner part is peeled off first by the energy associated with the action of the above, and the energy still remaining by peeling is defeated by a part or all of the outer part, and as a result, the tearing of the water-permeable bag is effectively prevented.

  In the invention according to claim 6, by setting the welding force of the outer part gradually stronger than the welding force of the inner part, when the vapor pressure generated by the heat generated by the heat generating agent acts on the water-permeable bag, The inner part is gradually peeled off first by the energy associated with the action of the vapor pressure, and the energy that remains even after peeling is defeated by some or all of the outer part, and as a result, the breakage of the water-permeable bag is effectively prevented Is done.

  In the invention according to claim 7, the effect is the same as that of the invention according to claim 4, but the welded part can be partially peeled off by the vapor pressure generated by the heat generated by the heat generating agent, and the welded part is welded. Since the inside and outside of the water-permeable bag cannot be communicated because a part of the part cannot be peeled off, part or all of the welded part remains without being peeled off, thereby allowing communication between the inside and outside of the water-permeable bag, that is, the water permeation The tearing of the sex bag is effectively prevented.

  In the invention according to claim 8, the vapor pressure generated by the heat generated by the heat generating agent is applied to the water-permeable bag by setting a part of the welding force that cannot be peeled stronger than the part of the welding force that can be peeled. Sometimes, due to the energy associated with the action of the vapor pressure, a part of the welding site having a weak welding force is peeled off first, and the energy that remains even after peeling is defeated by a part or all of the welding part. The tearing of the sex bag is effectively prevented.

  Hereinafter, embodiments of the portable food of the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

[Structure of mobile food]
1 and 2 show an embodiment of a portable food product, FIG. 1 is a perspective view, and FIG. 2 is a cross-sectional view. The portable food 1 of this embodiment is a container 2 in which a food 3 and a heat generating agent pack 4 in which a heat generating agent is enclosed in a water-permeable bag are accommodated and sealed. The heat generating agent pack 4 is a heat generating agent. Reacts with the water injected by opening the container 2 to generate heat and heat the food 3.

  The container 2 is formed of a heat-resistant body that wraps the food 3 and the heat generating agent pack 4 and has a rectangular bag shape having the fixing portion 2a on the outer periphery, but is not limited thereto. On the opening side of the container 2 of this embodiment, a notch 20 serving as a guide for opening on both sides is formed, and a cut line 21 connecting the notch 20 is formed on the inner side of the fixing portion 2a on the opening side. ing. A seal portion 2b is linearly formed inside the cut line 21, and this seal portion 2b is composed of a concave portion 2b1 and a convex portion 2b2. However, the notch 20 and the seal portion 2b may not be provided. .

  The food 3 is, for example, cooked pilaf, dried cooked rice, and the like, packed in a transparent resin bag 30, and further packed in a transparent resin bag 31 together with a seasoning pack 3a, a spoon 3b, and the like.

[Use of mobile food]
FIG. 3 is a diagram showing a usage form of portable food. As shown in FIG. 3A, the portable food 1 is a food in which a food 3 and a heat generating agent pack 4 in which a heat generating agent is sealed in a water-permeable bag are contained in a container 2 and sealed. And the exothermic pack 4 are housed in the container 2 together and sealed, and the container 2 has a special structure for distinguishing the food 3 from the exothermic pack 4, a structure for setting the exothermic pack 4, and the like. There is no need to provide it, and it has a simple structure, is low in cost, is not bulky, and is easy to store and transport.

  At the time of eating and drinking, as shown in FIG. 3 (b), the portable food 1 is opened by cutting the container 2 from the notch 20 along the cut line 21. And the transparent resin bag 30 which put the foodstuff 3 from the transparent resin bag 31, the seasoning pack 3a, and the spoon 3b are taken out. Further, the food 3 is taken out from the transparent resin bag 30 and placed in the container 2, the seasoning is taken out from the seasoning pack 3 a, placed in the container 2, stirred with the spoon 3 b, and the spoon 3 b is placed in the container 2. Instead, as shown in FIG. 3 (c), a predetermined amount of water 5a is injected from the cup 5, and the container 2 is sealed.

  As shown in FIG. 3D, the container 2 is sealed by fitting the concave portion 2b1 and the convex portion 2b2 of the seal portion 2b. In this sealed state, the exothermic agent of the exothermic pack 4 reacts with water. The food 3 is heated to generate heat. By setting the container 2 in a sealed state, the food 3 can be heated in a short time by the exothermic pack 4.

  As shown in FIG.3 (e), food | food 3 can be eaten / drinked by cancel | releasing fitting of the recessed part 2b1 and the convex part 2b2 of the seal | sticker part 2b. In this way, at the time of eating and drinking, just by opening the container 2 and injecting water, the exothermic agent of the exothermic pack 4 reacts with water and generates heat and becomes easily edible, and easily eats portable food anytime and anywhere. be able to.

  Next, the configuration of the portable food 1 will be described in detail.

(container)
The material and structure of the container 2 are not particularly limited, and are appropriately selected from metal, plastics, wood, ceramics, paper, laminate film, composite materials of various materials, taking into account food, merchandising, cost, etc. Is done. Depending on merchandising, it may be desirable to make the container transparent so that the contents can be observed. In that case, the material of the transparent single layer is styrene resin, polypropylene, polypropylene / eval / polypropylene if you want to make a transparent multilayer type, and external protective paint / aluminum foil / heat if you want to make an aluminum foil type. It is preferable to manufacture with seal lacquer, outer surface protective paint / aluminum foil / polypropylene.

  In recent years, disposal of used plastic containers has become a problem. Volume reduction is the initial treatment required to process used plastic containers quickly and economically. Therefore, if the container is made of a material that can be easily reduced in volume, it can contribute to environmental problems.

  The cross-sectional shape of the container 2 varies depending on the type of food. For example, for rice such as red rice, white rice, gomoku rice, chirashi sushi, various cooked foods, prepared dishes, curry, beef stew, gratin, pilaf, etc. A tray type is preferred. The cup type is suitable for liquid foods such as pot rice, udon, ramen, spaghetti, oden, etc.

(Food)
The type of food 3 is not particularly limited, but as described above, for example, rice such as red rice, white rice, gomoku rice, chirashi sushi, various cooked foods, prepared dishes, curry, beef stew, gratin, pilaf, etc. Also, there are ekiben, catered lunches, and other liquid foods such as kamameshi, udon, ramen, oden, soups, and sake. These foods 3 may be packed with resin or the like, or may not be packed, but the liquid food needs to be packed.

(Fever pack)
The heat generating agent pack 4 encloses the heat generating agent in a water permeable bag and seals it, and the heat generating agent reacts with water that permeates from the water permeable bag to generate heat.

"Fever"
The exothermic agent includes a composition comprising granular or powdered quicklime and a neutralizing agent. Any exothermic agent may be used as long as it uses an exothermic reaction of a chemical substance, and a typical exothermic agent that uses a hydration reaction between quick lime (calcium oxide) and water is used.

  15-30% of powdered quicklime of 100 mesh (-150 [mu] m 90% or more) to 200 mesh (-75 [mu] m 95% or more), and -330 mesh (-45 [mu] m) is 40-60%, +330 mesh per mass of the heat generating agent (+45 μm) is 15-30%, +235 mesh (+63 μm) is 15%>, +200 mesh (+75 μm) is 70% to 85% powdery aluminum having a particle size distribution, and when reacted with water, Water vapor of about 90 ° C. to about 100 ° C. is generated in a short time, and the duration until it drops to 60 ° C. is at least 20 minutes.

Furthermore, the amount of heat generated can be increased by adding sodium chloride (NaCl), and the heat generation time can be extended and the amount of hydrogen generated can be reduced by adding magnesium chloride (MgCl ₂ ).

  Further, since the exothermic agent reacts with water and generates heat to become alkaline, it is neutralized by adding a neutralizing agent. The neutralizing agents are organic di- or poly-carboxylic acids such as maleic acid, fumaric acid, oxalic acid, malonic acid, succinic acid and similar acids, and in particular hydroxy acids such as citric acid, gluconic acid, ascorbine. Acids, glycolic acid, glyceric acid, lactic acid, malic acid, tartaric acid, salicylic acid and similar acids, as well as benzoic and phosphoric acids and other inorganic acids.

  The type and amount of the neutralizing agent are preferably about pH 6.0 to 8.0, and citric acid is preferable from the viewpoint of price. The neutralizing agent may also be present, for example, in capsules, granules or small tablets. Such capsules, granules or small tablets have a size, for example 50-250 μm, and may be evenly distributed throughout the absorbent material.

  Here, the exothermic agent includes a composition composed of granular or powdered quicklime and a neutralizing agent, so that it hardly emits odor at the time of exotherm, heat generation efficiency is relatively good, and directly heats food. It is because it can eat and drink.

  Moreover, the water injected by opening the container 2 at the time of eating and drinking can be used as electrolytically reduced water, and it is suppressed that the exothermic agent reacts with the electrolytically reduced water to generate heat, and the exothermic agent is granular. Or just powdery quicklime is sufficient, and a neutralizing agent becomes unnecessary.

"Water-permeable bag"
In this embodiment, the heat-generating agent pack 4 is one in which the heat-generating agent is enclosed in a water-permeable bag, and the water-permeable bag is constituted by a water-permeable woven or non-woven fabric containing weldable fibers, and water penetrates. However, the exothermic agent enclosed inside does not leak to the outside.

(The exothermic pack of the first embodiment)
As shown in FIG. 4, the overall shape of the heat generating agent pack 4 is generally rectangular when viewed from above, but it is not necessary to limit to this shape. As can be understood from the method for producing the heating agent, the rectangle is the most easily produced shape, but various shapes can be selected depending on the food or the like in which the heating agent is used. For example, a triangle or a shape in which a part of the side is formed as a curve can be cited as a shape other than a rectangle.

  As shown in FIG. 5, the heat generating agent pack 4 includes a heat generating agent 40 and a water-permeable bag 41 in which the heat generating agent 40 is enclosed. The exothermic pack 4 is used for heating and heating food. The exothermic agent 40 has a property of generating heat by addition of water, that is, a property of generating heat by causing exothermic reaction upon contact with added water.

  The water-permeable bag 41 according to this embodiment is formed of a water-permeable woven fabric including weldable fibers such as ultrasonic waves, high frequencies, and heat, and has a bag shape as a whole. In order to form the water-permeable bag 41 in a bag shape, it is necessary to partially form a welded part such as an ultrasonic wave, a high frequency, and heat. This is because it cannot be formed into a bag shape at the stage of manufacturing a woven fabric, and it is necessary to fold one piece of cloth formed into a sheet shape and weld the overlapping portions by bending. It is also possible to form two sheets of cloth by welding alone without bending.

  Examples of the woven fabric including the weldable fiber include a woven fabric woven with only the weldable fiber and a woven fabric woven with the weldable fiber and fibers other than the weldable fiber. Moreover, the water-permeable bag 41 can be formed with the water-permeable nonwoven fabric containing a weldable fiber. Nonwoven fabrics containing weldable fibers include, for example, nonwoven fabrics in which the contained fibers are only welded fibers, and nonwoven fabrics in which the contained fibers contain fibers other than the welded fibers. The weldable fibers are made of synthetic fibers such as polyester fibers, polypropylene fibers, and polyethylene fibers, and have a property of softening and melting when ultrasonic waves, high frequencies, heat, and the like are applied.

  Whether to select a woven fabric or a non-woven fabric depends on the preference of the user / manufacturer, but in this embodiment, a woven fabric was used.

  As for the woven fabric which comprises the water-permeable bag 41, the welding fiber which comprises this is preferably comprised only from a polyester fiber. In other words, it is better not to mix fibers other than polyester fibers. This is because when different fibers are mixed, inconveniences such as difficulty in adjusting the welding are expected.

  The weaving density of the woven fabric constituting the water permeable bag 41 is preferably 300 to 1200 in the number of warps and wefts per square inch (2.54 cm × 2.54 cm) of the woven fabric. This is because leakage of the heat generating agent 40 from the water permeable bag 41 can be prevented. The reason for excluding the woven density of less than 300 is to eliminate such a fear because if the number is less than 300, the texture of the woven fabric becomes too coarse and the heat generating agent 40 may leak from the water permeable bag 41. is there. On the other hand, the reason why the weaving density exceeding 1200 is excluded is that if it exceeds 1200, the texture of the woven fabric is too fine and sufficient water permeability cannot be secured.

  Although it does not prevent the fiber diameter from being set in a range outside the above range, the reason for setting the fiber diameter in the above range lies in these points. Furthermore, by selecting the weave density within the above range, it is possible to adjust the time required for water to permeate the woven fabric, and hence the time required for the water to contact the heat generating agent 40 and generate heat. According to the experiment, when the weaving density is about 300, immediately after the addition of water, about 500, after about 5 seconds after addition, about 800, after about 60 seconds after addition, In the case of around 1200 pieces, it was found that the exothermic agent 40 generated heat after about 1 week after the addition of water.

  The water permeable bag 41 is required to have water permeability, but because of this water permeability, water is applied to the heat generating agent pack 4 to hydrate the heat generating agent 40 through the woven fabrics 41a and 41b of the water permeable bag 41. Can do. The water added to the heat generating agent 40 through the woven fabrics 41a and 41b causes the heat generating agent 40 to generate heat by touching the heat generating agent 40, and the water is heated and vaporized as the heat is generated, and becomes water vapor. The water vapor exerts a vapor pressure on the water permeable bag 41 from the inside toward the outside, and a part of the water vapor leaks from the inside through the eyes of the woven fabrics 41 a and 41 b constituting the water permeable bag 41. The heat of the leaked water vapor and the heat of the heat generating agent pack 4 itself are directly or indirectly transmitted to the substance of the food 3 through air or the like to exert a heating or heating action.

  The water permeable bag 41 has a welding portion 50. The welding part 50 is formed by welding the woven fabrics 41a and 41b so that an enclosing space for the heat generating agent 40 is generated between them. As shown in FIG. 4, the water-permeable bag 41 having the welded portion 50 welds the U-shaped peripheral edges of the two woven fabrics 41 a and 41 b generated by folding one long and narrow rectangular woven fabric. For example, as shown in FIG. 6, two woven fabrics stacked on top of each other can be welded along four sides of a rectangle. When folding is performed, no welded portion is formed at the bent portion.

  The welding part 50 has an outer part 50a located on the outer part and an inner part 50b surrounded by and adjacent to the outer part 50a, and the enclosure space of the heat generating agent 40 is directly partitioned by the inner part 50b. ing. For this reason, the inner shell part 50b directly touches the heat generating agent 40.

  The outer portion 50a and the inner portion 50b are set so that the welding force of the outer portion 50a is stronger than the welding force of the inner portion 50b. For example, the welding force of the outer portion 50a is set to be gradually stronger than the welding force of the inner portion 50b, and this gradual strength may be stepwise or continuous instead of stepwise.

  The degree of welding force of the outer portion 50a and the degree of welding force of the inner portion 50b are determined when the woven fabrics 41a and 41b receive the pressure of water vapor (vapor pressure) generated by the addition of water to the heating agent 40. 41a and 41b can be peeled off at the inner shell part 50b and cannot be peeled off at least at a part of the outer shell part 50a, so that the inside and outside of the water-permeable bag 41, that is, the inside and outside of the enclosed space cannot be communicated. .

  Further, the welding force is increased stepwise from the inside toward the outside of the inner shell portion 50b, and in addition to or in place of this, the outer shell portion 50a itself is stepped from the inside toward the outside (for example, The welding power can be increased in two stages). This is because it is considered that the tearing of the water-permeable bag 41 can be more difficult to occur when the peeling is performed in stages than at once.

  According to this, as shown in FIG. 5, the woven fabrics 41a and 41b are swollen by receiving the vapor pressure as the heated exothermic agent 40 generates heat, and the water vapor V is diffused to the outside through the woven fabrics 41a and 41b. At this time, peeling occurs in the inner part 50b (indicated by an imaginary line). At this time, a part of the vapor pressure energy that tries to spread the woven fabrics 41a and 41b is consumed for the separation of the inner portion 50b, and the vapor pressure decreases. In other words, the inner shell part 50b has a function as a buffer part for preventing a strong pressure from being applied to the outer shell part 50a.

  Further, the volume of the encapsulating space of the heat generating agent 40 increases due to the peeling of the inner portion 50b, and this also causes a decrease in vapor pressure. Further, a part of the generated water vapor flows out of the water permeable bag 41 through the woven fabrics 41a and 41b, and the vapor pressure is also lowered by this. The reduced vapor pressure exerts a peeling force on the outer portion 50a connected to the inner portion 50b, but is not large enough to peel the entire outer portion 50a. As a result, at least a part of the outer portion 50a remains without being peeled off, thereby preventing communication between the inside and outside of the water-permeable bag 41, that is, the tearing of the water-permeable bag 41.

  The width dimension of the outer part 50a and the width dimension of the inner part 50b, the degree of welding of these parts, and the like are appropriately determined in consideration of the amount of the heat generating agent 40, the tensile strength of the woven fabrics 41a and 41b, and the like. As described above, when the woven fabric is folded, a welded portion is not formed in the bent portion, and therefore a buffer function cannot be expected for that portion. Since an extra burden is applied to the inner contour portion 50b formed as much as it is not formed, it is necessary to set the extra contour in consideration of the extra burden when designing the inner contour portion 50b.

  Moreover, in the example of illustration, although the heat generating agent pack 4 has a rectangular planar shape as a whole, it can replace with this and can have another arbitrary planar shape. Furthermore, the shape of the welding part 50 can have another arbitrary planar shape. For example, a semi-circular shape can be used instead of the illustrated example of the U-shape, and a circular shape can be used instead of the rectangular shape.

(Method of manufacturing a heat generating agent pack according to the first embodiment)
The exothermic pack 4 shown in FIG. 4 can be manufactured as follows. First, a water-permeable woven fabric containing weldable fibers is procured (material procurement process). Next, the heat-generating agent 40 is sealed in the water-permeable bag 41 by folding the procured woven fabric and welding the overlapped woven fabrics (heat-generating agent pack forming step).

  For encapsulating the heat generating agent 40, for example, a method of forming a partially unwelded water-permeable bag 41 and filling the heat generating agent 40 through the unwelded portion (opening) and then welding the unwelded portion, There is a method in which the other woven fabric is stacked on one woven fabric on which the heat generating agent 40 is placed, the heat generating agent 40 is sandwiched, and the woven fabrics stacked so as to surround the heat generating agent 40 sandwiched are welded.

  In the material procurement process, for example, an elongated strip-shaped woven fabric is prepared. By applying the heat generating agent pack forming step to the strip-shaped woven fabric, a plurality of heat generating agent packs 4 connected to each other can be manufactured continuously. The obtained plurality of exothermic agent packs 4 can be used in the above-described applications as they are, that is, in a continuous state, or by cutting them into a single body.

  An apparatus for performing the exothermic agent pack forming step can be configured as shown in FIG. This apparatus includes a pair of heating sealers 67, 67 extending in the longitudinal direction (vertical direction) of the woven fabric, and a pair of heating sealers extending below the heating sealers 67, 67 and extending in the transverse direction (lateral direction) of the woven fabric. 69, 69, and a pair of feed rollers 80, 80 for feeding the woven fabrics 41a, 41b in the longitudinal direction thereof.

  When the woven fabric is passed between a pair of heating sealers 67, 67, sandwiched from both sides by the heating sealers 67, 67 and pressed, the woven fabric is folded into two, and the two woven fabrics 41a, 41b are heat welded to each other at these edges. This heat welding is performed while the woven fabric is moved by the feed rollers 80 and 80.

  After the woven fabrics 41a and 41b are moved by a predetermined distance, the operation of the feed rollers 80 and 80 is stopped, and the edges of the two woven fabrics 41a and 41b are sandwiched from both sides by the heating sealers 69 and 69. Press and heat weld (FIG. 7A). Thereafter, a predetermined amount of exothermic agent 40 is filled between the two woven fabrics 41a and 41b that have been welded.

Next, the heating sealers 67 and 69 are opened, that is, separated from the edges of the two woven fabrics 41a and 41b (FIG. 7 (b)), and the feed rollers 80 and 80 are operated, whereby the heating sealers 67 and 69 are operated. The woven fabrics 41a and 41b are moved until 67 becomes opposed to the unheated weld location. Thereafter, in the same manner as described above, the edges of the two woven fabrics 41a and 41b are thermally welded by the heating sealers 67 and 69, whereby one heat generating agent pack 4 is formed.

  At this time, as shown in FIG. 8, each of the two woven fabrics 41a and 41b has two portions 50a and 50b with different degrees of thermal welding on the outer portion of the edge portion and the inner portion thereof. Two heat transfer suppression layers 81 are arranged on both surfaces of the pair of heating sealers 67 and 69 facing each other. The heat transfer suppressing layer 81 is made of, for example, a sheet made of polytetrafluoroethylene, and transmits heat from both the heating sealers 67 and 69 to the inner walls of the edges of the two woven fabrics 41a and 41b. Restrict.

  According to this, heat transfer from the heating sealers 67 and 69 to the inner wall of the edge portions of the two woven fabrics 41a and 41b is suppressed, thereby welding to two parts having different degrees of thermal welding, that is, welding to the outer wall. The outer shell portion 50a having a high degree of welding is formed, and the inner shell portion 50b having a low welding degree is formed in the inner shell adjacent to the outer shell portion 50a.

  The temperature (T) applied to the edges of the two woven fabrics 41a and 41b from the heating sealers 67 and 69 to form the outer portion 50a, and the heat transfer suppression layer 81 to form the inner portion 50a. The temperature (t) applied to the edges of the two woven fabrics 41a and 41b from the heating sealers 67 and 69 is the exothermic agent in which the degree of thermal welding in the outer portion 50a and the inner portion 50b is added. 40 so that the inner portion 50b can be peeled off by the vapor pressure generated by the heat generation of 40, and at least a part of the outer portion 50b is not peelable so that the inside and outside of the water-permeable bag 41 cannot be communicated. Has been.

  For example, when a woven fabric made of polyester fiber yarn having a woven density of 500 to 750 is used as the woven fabric, the values of the temperatures T and t are suitably 165 to 170 ° C. and 130 to 150 ° C., respectively. The pressing time of the heating sealer against the fabric is suitably 0.5 to 1.5 seconds.

  The manufacture of a heating agent having a heat-welded portion formed by heat-welding two woven fabrics stacked on each other along the four sides of a rectangle is performed by adding another pair of heat sealers to the apparatus shown in FIG. It can be performed using an additional device. The other pair of heating sealers are the same as the heating sealer 67 and are arranged in parallel with the heating sealer 67. According to this, the heating sealer 67 and the additional heating sealer can simultaneously form two portions extending along two mutually parallel sides of the rectangular heat welding portion, and the heating sealer 69 can Two portions extending along two other parallel sides of the rectangular heat-welded portion can be sequentially formed.

(Exothermic pack of the second embodiment)
Instead of the first embodiment in which the degree of welding strength of the welding part 50 is different between the outer part 50a and the inner part 50b, as shown in FIGS. 9 and 10, the welding part 50 as a whole is welded. The degree can be made uniform and only the outer portion 50a can be reinforced. The outer portion 50a can be reinforced by fixing, for example, a plastic cover 51 extending along the circumference of the outer portion 50a and covering the outer portion 50a to the outer portion 50a. .

  According to the heat generating agent pack 4 shown in FIG. 10, the woven fabrics 41a and 41b swell due to the vapor pressure as the heated heat generating agent 40 generates heat, and the water vapor V is diffused to the outside through the woven fabrics 41a and 41b. At this time, peeling occurs in the inner shell part 50a (shown by an imaginary line), and as described above, a part of the vapor pressure energy is consumed for peeling the inner shell part 50b, thereby lowering the vapor pressure. At this time, the peeling action on the inner shell part 50b tends to reach the outer shell part 50a adjacent thereto, but the cover 51 that covers the outer shell part 50a from its surroundings stops the transmission of the peeling action to the outer shell part 50a. Therefore, the outer portion 50a does not have a peeling action, and therefore, the outer portion 50a remains without being peeled, and the water-permeable bag 41 is prevented from being broken.

(Exothermic pack of the third embodiment)
Another example of the heat generating agent pack 4 is one having an adhesive portion bonded with an adhesive instead of the welding portion 50 in the water permeable bag 41 of the heat generating agent pack 4 according to the first embodiment (not shown). ) It does not ask | require whether the woven fabric which comprises the water-permeable bag 41 which has an adhesion part will contain the said weldable fiber, if it has water permeability. This is because the welded portion is not provided. Moreover, it can replace with the said woven fabric and can be set as the nonwoven fabric which has water permeability. The nonwoven fabric includes Japanese paper.

  As in the heat generating agent pack 4 shown in FIGS. 4 and 5, the adhesion part is constituted by an outer part located on the outer part and an inner part located on the inner part adjacent to the outer part, The adhesive force of the outer shell part is set stronger than the adhesive force of the inner shell part, and this setting may be set stronger stepwise or may be set gradually stronger.

  With regard to the adhesive strength of the outer shell portion and the adhesive strength of the inner shell portion, the inner shell portion can be peeled off by the vapor pressure generated by the heat generation of the heated exothermic powder, and at least a part of the outer shell portion is peeled off. It is set so that the inside and outside of the water-permeable bag 41 cannot be communicated by being impossible.

As in the case of the welding portion described above, the inner shell portion itself is gradually increased in adhesive force from the inside to the outside, or alternatively, the outer shell portion itself is stepped from the inside to the outside. It is also possible to increase the adhesion force (for example, in two stages).
(Method for manufacturing a heat generating agent pack according to the third embodiment)
The manufacturing method of the heat generating agent pack having the adhesion part includes a material procurement process for procuring a water-permeable woven fabric, and folding the woven fabric procured in this material procurement process, A heat generating agent pack forming step of enclosing the heat generating agent 40 in the water-permeable bag 41 by adhering the adhesive with an adhesive or by adhering two woven fabrics together with an adhesive. In the raw material procurement step, instead of procuring the woven fabric, the water-permeable nonwoven fabric can be procured, and the exothermic pack forming step can be performed using the nonwoven fabric.

  In the heat generating agent pack forming step, the bonded portion is formed by bonding the woven fabric with an adhesive. The adhesion part includes an outer part formed on the outer part with a relatively large adhesive force (P), and an inner part formed on an inner part adjacent to the outer part with a relatively small adhesive force (p). It is constituted by. The adhesive force (P) and the adhesive force (p) can be separated from each other by the vapor pressure generated by the heat generated by the heated exothermic agent 40, and at least a part of the outer portion is not peelable. Therefore, the inside and outside of the water-permeable bag 41 are set so as to be unable to communicate with each other.

(Exothermic pack of the fourth embodiment)
Instead of the example of the third embodiment in which the degree of adhesive force of the adhesive part, that is, the magnitude of the adhesive force is different between the outer part and the inner part, the adhesive force of the entire adhesive part is As in the case described above, only the outer part is covered with a plastic cover having a U-shaped cross-sectional shape covering the periphery of the outer part as in the example shown in FIGS. Can be reinforced.

(Exothermic pack of the fifth embodiment)
In the exothermic pack 4 of another example of FIG. 11, the water-permeable bag 41 in which the heat-generating agent 40 is sealed is not bonded between the woven fabrics, but has a heat-resistant woven fabric 42 and a plastic, wooden or the like. It is formed by adhering the sealing member 45 with an adhesive. Although the sealing member 45 is made of a plate member in the illustrated example, the sealing member 45 may have any shape as long as it can form a sealing space, that is, a sealing space for the heating agent 40 in cooperation with the woven fabric 42.

  The heat generating agent pack 4 has an adhesion portion 43 formed by adhering the woven fabric 42 and the sealing member 45 with an adhesive. The adhesion part 43 extends along a closed curve such as a rectangle or a circle when viewed in plan. The exothermic agent 40 is enclosed between the woven fabric 42 and the sealing member 45 in the range surrounded by the closed curve, and the exothermic agent 40 is added through the woven fabric 42.

  The adhesion part 43 is constituted by an outer part 43a located in the outer part and an inner part 43b located in the inner part adjacent to the outer part 43a, and the adhesive force of the outer part 43a is that of the inner part 43b. It is set to be stronger (larger) than the adhesive strength. As a result, the woven fabric 42 can be peeled from the sealing member 45 at the inner portion 43b that receives the pressure (vapor pressure) of the water vapor V generated by the heat generated by the heated exothermic agent 40, and the woven fabric at the outer portion 43a. The inside and outside of the water-permeable bag 41 are configured to be unable to communicate with each other because at least a part of the water cannot be peeled off from the sealing member 45.

According to this, a part of the vapor pressure energy for pushing and spreading the woven fabric 42 is consumed for the separation of the inner portion 43b, that is, the separation of the woven fabric 42 in the inner portion 43b. This causes a drop in the vapor pressure. Moreover, the volume of the enclosing space of the heat generating agent 40 increases due to the peeling of the inner portion 43b, and this also causes the vapor pressure to decrease. Furthermore, a part of the generated water vapor flows out of the water-permeable bag 41 through the woven fabric 42, and the vapor pressure is further reduced. The reduced vapor pressure exerts a peeling force on the outer portion 43a connected to the inner portion 43b, but is not large enough to peel the entire outer portion 43a. As a result, at least a part of the outer portion 43a remains without being peeled off, and communication between the inside and outside of the water permeable bag 41, that is, the tear of the water permeable bag 41 is prevented (heating agent pack of the sixth embodiment).
Instead of the example shown in FIG. 13 in which the adhesion part 43 is composed of the outer part 43a and the inner part 43b having different adhesion strengths, the adhesion force of the entire adhesion part is, for example, the same as the adhesion force in the inner part. It is possible to reinforce only the outer part (not shown). As in the example shown in FIGS. 9 and 10, the outer portion can be reinforced by fixing a U-shaped plastic cover (not shown) covering the outer portion to the outer portion. .

  According to this, when the woven fabric swells due to the heat generation of the heated exothermic agent 40, the inner contour part peels off due to the peeling force. However, the outer portion does not peel off due to the reinforcement by the cover, thereby preventing the water-permeable bag 41 from being torn. In this example as well, a water-permeable nonwoven fabric can be used instead of the woven fabric.

(The exothermic pack of the seventh embodiment)
In another example of the heat generating agent pack 4 shown in FIG. 12, the water permeable bag 41 in which the heat generating agent 40 is enclosed is formed of a water permeable woven fabric or a non-woven fabric containing ultrasonic weldable fibers. The same thing as embodiment of this is used. The welded portion 60 of the water permeable bag 41 is formed by ultrasonic welding of woven or non-woven fabrics, and an outer portion 60a located on the outer contour and an inner contour located adjacent to the outer contour portion 60a. Similarly to the first to sixth embodiments, the inner portion 60b can be peeled off by the vapor pressure generated by the heat generated by the heat generating agent 40, and at least a part of the outer portion 60a is formed. The inside and outside of the water-permeable bag 41 cannot be communicated by being inseparable.

  An apparatus for performing the heat generating agent pack forming step can be configured as shown in FIG. This apparatus includes an ultrasonic horn 77 extending in the longitudinal direction (vertical direction) of the woven fabrics 41a and 41b, and an ultra sonic that is positioned below the ultrasonic horn 77 and extends in the transverse direction (lateral direction) of the woven fabrics 41a and 41b. A sonic horn 79 is disposed, and further includes a pair of feed rollers 80 and 80 for feeding the woven fabrics 41a and 41b in the longitudinal direction.

  The woven fabrics 41a and 41b are folded in two, and the two woven fabrics 41a and 41b generated by the folding are ultrasonically welded to each other by the ultrasonic horn 77 at their edges. This ultrasonic welding is performed while the woven fabrics 41 a and 41 b are moved by the feed rollers 80 and 80.

  After the woven fabrics 41a and 41b are moved by a predetermined distance, the operation of the feed rollers 80 and 80 is stopped, and the edges of the two woven fabrics 41a and 41b are sandwiched and pressed from both sides by the ultrasonic horn 79. Then, ultrasonic welding is performed (FIG. 13A). Thereafter, a predetermined amount of exothermic agent 40 is filled between the two woven fabrics 41a and 41b which are ultrasonically welded.

  Next, as shown in FIG. 13B, by operating the feed rollers 80 and 80, the woven fabrics 41a and 41b are moved until the ultrasonic horn 77 is opposed to the non-ultrasonic welding location. The Thereafter, in the same way as described above, ultrasonic welding of the edges of the two woven fabrics 41a and 41b by the ultrasonic horns 77 and 79 is performed, whereby one heat generating agent pack 4 is formed.

  At this time, as shown in FIG. 14, the ultrasonic horns 77 and 79 are formed at the ends of the two woven fabrics 41a and 41b, respectively, and the tapes 77a and 79a are formed at the leading ends. 79a, the welding force of the outer portion 50b can be set gradually stronger than the welding force of the inner portion 50a.

  According to this, the ultrasonic waves from the ultrasonic horns 77, 79 to the inner edges of the edges of the two woven fabrics 41a, 41b are suppressed by the tapers 77a, 79a, and the degree of ultrasonic welding is thereby reduced. The portion 50b becomes gradually stronger than the inner portion 50a, the boundary between the ultrasonic welded portion and the non-ultrasonic welded portion becomes ambiguous, and steam generated by the heat generated by the heated exothermic agent 40 It is set so that the inner portion 50b can be peeled off by pressure, and the inside and outside of the water-permeable bag 41 cannot be communicated when at least a part of the outer portion 50b is not peelable.

(The exothermic pack of the eighth embodiment)
The exothermic pack 4 of another example of FIG. 15 is configured in the same manner as the exothermic pack of the eighth embodiment, but a welding portion 60 formed by welding woven fabrics or non-woven fabrics is a heating agent. The part 60c of the welding part 60 can be peeled off by the vapor pressure generated by the heat generation, and the part 60d of the welding part 60 cannot be peeled off, so that the inside and outside of the water-permeable bag 41 cannot be communicated. In this embodiment, a part 60c of the welding part 60 and a part 60d of the welding part 60 are provided in a zigzag pattern.

  The apparatus for carrying out the heating agent pack forming step is configured in the same manner as the apparatus of FIG. 13, and welded to the edges of the two woven fabrics 41a and 41b by ultrasonic horns 77 and 79 as shown in FIG. The welding force of the part 60c of the part 60 can be set to be weaker than the welding force of the part 60d of the welding part 60, and a part of the welding part 60 is generated by the vapor pressure generated by the heat generated by the heated exothermic agent 40. It is set so that the inside and outside of the water-permeable bag 41 cannot be communicated by being able to peel 60c and not being able to peel a part 60d of the welded portion 60.

  The heat generating agent packs of the seventh and eighth embodiments perform ultrasonic welding, but are not limited to this, and may be high-frequency welding.

  The present invention can be applied to portable foods that can be cooked and kept at any time regardless of location and time, and can be stored and transported with a simple structure, low cost and without bulk. It is easy, and food can be heated only by opening and injecting water during eating and drinking.

It is a perspective view of portable food. It is sectional drawing of portable food. It is a figure which shows the usage form of a portable food. It is a perspective view of the heat generating agent pack of 1st Embodiment. It is sectional drawing which shows the welding site | part of a heat generating agent pack. It is a perspective view of the other heat generating agent pack of 1st Embodiment. It is a figure explaining the manufacturing method of the heat generating agent pack which concerns on 1st Embodiment. It is sectional drawing which shows the other welding part of a heat generating agent pack. It is a perspective view of the heat generating agent pack of 2nd Embodiment. It is sectional drawing which shows the welding site | part of a heat generating agent pack. It is sectional drawing of the other heat generating agent pack of 5th Embodiment. It is a perspective view of the heat generating agent pack of 7th Embodiment. It is a figure explaining the manufacturing method of the heat generating agent pack which concerns on 7th Embodiment. It is sectional drawing which shows the welding site | part of a heat generating agent pack. It is a perspective view of the heat generating agent pack of 8th Embodiment. It is sectional drawing which shows the welding site | part of a heat generating agent pack.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable food 2 Container 3 Food 4 Exothermic pack 40 Exothermic agent 41 Permeable bag 43 Adhesion part 50,60 Welding part 67,69 Heating sealer 77, 79

Claims (8)

Portable food in which a food and a heat-generating agent pack in which a heat-generating agent is sealed in a water-permeable bag are housed and sealed;
A portable food characterized in that the exothermic agent reacts with water injected by opening the container during eating and drinking to generate heat and heat the food.   The portable food according to claim 1, wherein the container is sealed and the food is heated.   The portable food according to claim 1, wherein the exothermic agent includes a composition comprising granular or powdered quicklime and a neutralizing agent. The water-permeable bag is composed of a water-permeable woven or non-woven fabric containing weldable fibers,
The welded part formed by welding the woven fabric or the nonwoven fabric is composed of an outer part located in the outer shell, and an inner part located in the inner shell adjacent to the outer shell part,
The inner portion can be peeled off by the vapor pressure generated by the heat generated by the heat generating agent, and at least a part of the outer portion is not peelable, so that the inside and outside of the water-permeable bag cannot be communicated. The portable food according to claim 1, wherein the portable food is characterized.   The portable food according to claim 4, wherein a welding force of the outer portion is set to be stronger than a welding force of the inner portion.   The portable food according to claim 4, wherein a welding force of the outer shell part is set to be gradually stronger than a welding force of the inner shell part. The water-permeable bag is composed of a water-permeable woven or non-woven fabric containing weldable fibers,
The welded part formed by welding the woven fabric or the nonwoven fabrics can be partly peeled off by the vapor pressure generated by the heat generated by the heat generating agent, and part of the welded part cannot be peeled off. The portable food according to claim 1, wherein the inside and outside of the water-permeable bag are configured so as not to communicate with each other. The portable food according to claim 7, wherein a part of the welding force that cannot be peeled is set to be stronger than a part of the welding force that can be peeled off.