JP4340109B2 - Thermal insulation package - Google Patents

Description

More specifically, the present invention relates to a heat-insulating package, and more specifically, a heat generating agent that undergoes an exothermic chemical reaction with water and a substance that supplies water are separated and stored in advance, and these are mixed as necessary to quickly generate heat. The present invention relates to a heat insulating package of a type that exerts its action.
Examples of the use of heat-insulated packaging include warming the body surface such as the shoulders, hips, and limbs of humans and animals, warming the body surface in footwear, etc., and body surfaces for emergency treatment of bruises, sprains, and frostbite. A warming mode, a warming of the body surface for treatment of diseases such as stiff shoulders, muscle pain, arthritis, a warming of the eyes, neck, etc. to heal fatigue, and maintenance of the target individual so as not to decrease during surgery It is used in a wide variety of situations, such as warming the affected area, but since the set temperature and set time are different in each application scene, there is a need for a heat insulation package suitable for each application situation. ing.
The heat insulation package of the present invention is a heat insulation device for warming an affected part, and in particular, a relatively mild temperature in an application scene, for example, a temperature range in which a set temperature is close to a body temperature (for example, within 10 ° C. including a body temperature range). The present invention relates to a heat insulating package that is in a temperature range and maintains the temperature range for a long time (for example, 1 hour or more).

As a so-called chemical warmer using heat generated by a chemical reaction, a heat insulating package of a type using heat of hydration or heat of dissolution when inorganic salts as heat generating agents are dissolved in water is widely known. For example, Patent Document 1 discloses an inorganic salt powder which generates heat by water addition or a small amount of crystal water, and adsorbent powder such as silica gel, activated carbon, zeolite, kaolin and polymer adsorbent adsorbed with water, such as thin paper. There is disclosed a heater which is partitioned by an easily burstable separation sheet and stored in a flexible airtight container. Patent Document 2 discloses a “heating or cooling pack”, and the heating pack is a chemical (for example, calcium chloride) that chemically generates an exothermic reaction in one housing portion of the continuous packaging bag. And the structure which accommodates starch and accommodates water in another accommodating part is disclosed.
However, in the conventional heat insulation package, since emphasis was put on the control of the reaction temperature and the heating effect, there is nothing to consider about the touch of the bag. Therefore, when actually used, for example, if the heat-insulating package is directly applied to a local area such as an affected part, there is a disadvantage that the touch is bad.

In addition, as other problems, there are problems such as formation of massive crystals, liquid leakage associated therewith, and uncomfortable use.
For example, as described in Patent Document 1, when an inorganic salt powder and an adsorbent powder such as a polymer adsorbent that adsorbs water are separated by an easily rupturable separation sheet such as thin paper and hermetically packaged, by mixing Although the exothermic reaction proceeds, the reaction product becomes liquid and a crystalline lump is formed in the reaction solution. It seems that this crystalline substance may be formed because the base polyvalent metal ion of the exothermic agent is taken in and bonded into the highly water-absorbing resin swollen with water, and the highly water-absorbing resin cannot be ionically dissociated. Thus, when a crystal substance is generated in the package, the crystal lump hits the skin through the bag during use, and there is a sense of incongruity, and there is a risk that the package is broken and the reaction solution leaks. In addition, when using a powder such as silica gel that adsorbs water, both the exothermic agent and water retention agent are powders, so it is difficult to mix smoothly during use, and the adhesion to uneven surfaces is poor. There is.

As another problem, in the case of a heat-insulating package in a form that does not generate bulk crystals, the progress of the exothermic reaction at the start of use is slow, the heating ability such as the durability of the heat-retaining effect is low, and water leakage And problems such as handling properties.
That is, in the case of a heating pack configured to store a heat generating agent and starch in one housing part of a hermetic package as described in Patent Document 2 and to store water in the other housing part, The above-described problems hardly occur. However, since a large amount of starch is contained in the exothermic container (for example, about 20% with respect to calcium chloride), there is a disadvantage that the reaction is slow and the exothermic reaction is difficult to proceed. Moreover, there is a risk of water leakage due to a seal failure or the like in the water accommodating portion. If the water storage bag is torn during transportation, or if water leaks due to poor sealing, etc., an unexpected exothermic reaction will occur before use, and the product will be damaged. In addition, in the case of a structure in which the heat generating agent storage part and the water storage part are connected via an easily peelable fraction bonding part, in addition to the problem of contaminating other things when water leaks, Therefore, there was a problem that it was difficult to handle.

As a heat-insulating package having no problem as described above, the applicant of the present invention contains at least two heat-generating agents that can be communicated with each other by applying an external force that contains a heat-generating agent in one housing portion and a substance that dissolves the heat-generating agent in the other housing portion. As the bag body provided with one housing part, a bag body formed by firmly sealing the peripheral part of at least two sheet materials having different thermal conductivities and / or tactile sensations, or at least capable of communicating by applying external force One storage part of a bag having two storage parts contains powder or granules of at least one exothermic agent that dissolves in water and undergoes an exothermic chemical reaction, and water is added to the other storage part to contain water. Developed a heat insulation package containing at least one water-absorbing resin gelled, at least one thickener powder selected from the group consisting of an absorptive substance that gels by absorbing salt water and starch. And already Are allowed application (see Patent Document 3).
Japanese Patent Publication No. 58-48183 (Claims) Japanese Patent Publication No.57-19971 (Claims) JP 2001-258922 A (Claims)

Although the problems of the conventional heat insulation package as described above can be almost solved by the heat insulation package developed by the applicant, there is still room for improvement.
That is, when the water-containing gel obtained using the water-absorbent resin is used as the water supply source in the exothermic chemical reaction with the heat-generating agent, the heat-generating agent immediately combines with the water in the water-containing gel when the two containing parts are connected and mixed. It reacts and the temperature rises quickly. On the other hand, since the chemical reaction is completed in a short time and the temperature starts to drop after the chemical reaction is finished, the duration is shortened and it is difficult to maintain the set temperature range for a long time. In particular, in the case of a lower set temperature, since the amount of the heat generating agent is reduced, the duration is further shortened. That is, in the water-containing resin hydrogel, if an exothermic agent is present, water in the water-containing gel is released and an exothermic reaction is started, so that it is difficult to suppress the exothermic reaction.

  In addition, as for the gel state, the water-containing gel of the water-absorbent resin alone is in the form of gel before communication, but the two storage parts communicate with each other and liquefy and become liquid when mixed, so there is a risk of leakage during use There is also a problem of crystal lump formation as described above. In order to solve this problem, the applicant of the present invention is a powder of at least one thickening material selected from the group consisting of a water-absorbing resin hydrogel, an absorptive material that gels by absorbing salt water, and starch. It was proposed to coexist with the above (Patent Document 3). When a salt water-absorbing substance or the like is mixed with the water-absorbent resin hydrogel, the two containing parts are connected to each other, and after mixing, an emulsified state is obtained and the gel state gradually becomes viscous. However, if the amount of the salt water-absorbing substance used is small, it will not be in a gel state, while if it is too large, gel formation management will be troublesome. Furthermore, there is a risk of liquid leakage during the time zone when the gel state is reached.

Therefore, the basic object of the present invention is to provide a heat insulation package that can be set at a gentle heating temperature and can maintain the heating temperature range for a long time without the problems of the prior art as described above. It is in.
Furthermore, the object of the present invention is to maintain a stable gel state from the start of use until the use period, there is no fear of water leakage, a soft touch feeling is maintained, and a touch and thermal feeling can be adjusted and selected. It is to provide a package.
Another object of the present invention is to provide a heat insulating package that is easily gelled and that can arbitrarily set the volume and surface area of the heat insulating package.

In order to achieve the above object, according to the present invention, an exothermic chemical reaction is carried out by dissolving in water in one container A having at least two containers that can communicate with each other by applying force from the outside. The powder or granule of the exothermic agent to be stored is contained, and in the other storage part B, the salt water having a salt water concentration in the range of 7 to 50 parts by mass with respect to 100 parts by mass of water is gelled with a salt water absorbent resin. The salt-containing water gel having the viscosity is contained , and the blending ratio of the salt-containing water gel and the exothermic agent is in the range of 20 to 100 parts by mass of the exothermic agent with respect to 100 parts by mass of the salt-containing water gel. A thermal insulation package is provided.

  In a preferred embodiment in which the tactile sensation and thermal sensation of the heat retaining package to be used can be adjusted and selected, the bag body firmly seals the periphery of two sheet materials having different thermal conductivities and / or tactile sensations. The formed bag body, and the bag body provided with at least two accommodating portions that can communicate with each other by applying a force from the outside, preferably at least two by being detachably bonded at a predetermined fraction bonding portion The bag body divided into the accommodating part is used. In this case, one side surface of the bag body is made of a single layer or composite layer plastic film having water resistance and heat resistance, or a composite layer plastic film sandwiched with aluminum foil, and the other side surface is laminated with a resin on the inner surface side. It is preferably made of a non-woven fabric of resin or cotton, cloth or paper, or a single layer or composite layer plastic film having water resistance and heat resistance in which the outer surface is flocked or raised.

The heat retaining package of the present invention uses a salt-containing gel obtained from salt water using a salt water-absorbing resin as a water supply source in an exothermic chemical reaction with the exothermic agent. When external pressure is applied to connect the accommodating parts A and B, the reaction between the exothermic agent and the salt water in the salt-containing water gel proceeds relatively gently, the rise of temperature is slightly delayed, and the chemical reaction takes time. The descent is slow and the set temperature range can be maintained for a long time. In addition, the concentrated salt water generated at that time is absorbed by the salt water-absorbing resin in a state diluted with salt water in the salt-containing water gel, so that a crystal lump is formed as in the case of using a conventional water-absorbing resin water-containing gel. There is no problem. Furthermore, the heat insulation package which can maintain the stable gel state through before and after communication of the accommodating parts A and B, and has the outstanding softness | flexibility and elasticity can be provided.
Compared with the case of using a conventional water-absorbent resin hydrogel, the salt-water gel can adjust the exothermic reaction with the exothermic agent by the salt water concentration and / or the amount of the salt water-absorbing resin used. The temperature and time to be set can be arbitrarily adjusted.

When a conventional water-containing resin hydrogel is used, there is a method of increasing the amount of water as means for expanding the volume of the water-containing gel container. However, the cost increases due to the increase in the amount of the water-absorbent resin for the gelation, and the problem that the gelation after the communication due to the increase in the amount of time occurs occurs. In addition, it affects the heating temperature and duration and may increase the amount of exothermic agent.
The volume of the conventional heat insulation package is mainly influenced by the capacity depending on the amount of water used, and affects the size of the surface area of the heat insulation package. That is, the small amount of water used means that the surface area of the heat insulation package is small. When the surface area of the heat insulation package is small, for example, a large number of sheets are required for a large affected area in the usage scene. Moreover, when using it for the incised affected part etc., it is preferable to use a small number (1, 2) in order not to hurt the wound, but the conventional heat-insulating package is not suitable for such a use mode.
On the other hand, in the case of the present invention, by changing the salt water concentration, it is possible to increase and expand the volume of the desired salt-containing water gel and the volume of the accommodating part B, and to change the volume and the surface area of the heat retaining package. it can. For example, it can be adjusted by increasing the salt water concentration and decreasing the water content in the salt-containing gel.

In addition, the heat retaining package of the present invention uses a salt-containing gel obtained from salt water using a salt water-absorbing resin as a water supply source in an exothermic chemical reaction with a heat-generating agent. There is no worry of water leakage from the start to use. That is, the salt-containing water gel does not have to worry about liquid leakage since the gel state does not change, such as liquefaction or emulsification, after the accommodating portions A and B are communicated.
In addition, it is desired that the affected part of the body is a heat-insulating package that softly covers the affected part, such as not hurting, not stimulating, and not compressing, and gives a pleasant heat feeling, but the heat-insulating package of the present invention is flexible. Since the salt-containing water gel having an appropriate viscosity and excellent elasticity is used, it can be used immediately after the accommodating portions A and B are communicated with each other, and can maintain a soft feeling of use for a long time.

Furthermore, according to another aspect of the heat insulation package of the present invention, the bag body is composed of a combination of two sheet materials having different thermal conductivities and tactile sensations, so the sheet surface is selected and pressed against the affected area. Thus, it is possible to select a rapid warming feeling or a gentle warming feeling, and it is possible to select the touch and the like, and a synergistic effect with the soft feeling of the package body provides a comfortable warm feeling different from the conventional one.
In addition, since it is a gel-like material that is contained in the heated packaging after use, it can be repeatedly used as a simple heated packaging with a high warming maintenance effect by heating again with a microwave oven or the like. You can also.

Hereinafter, each component of the heat insulation package of this invention is demonstrated in detail.
First, the exothermic agent is not particularly limited as long as it causes an exothermic reaction when dissolved in water. However, those that generate harmful substances or gases during the exothermic reaction are excluded. Specifically, with or without crystal water, calcium oxide, calcium chloride, calcium hydroxide, calcium sulfate, sodium carbonate, sodium hydroxide, cobalt chloride, copper sulfate, iron sulfate, iron chloride, calcium nitrate, bromide Magnesium, magnesium chloride, magnesium sulfate, potassium hydroxide, potassium carbonate, potassium sulfate, manganese sulfate, manganese chloride, sodium hydrogen carbonate, zinc sulfate, zinc chloride, barium hydroxide and the like can be mentioned alone or in combination of two or Three or more types can be used in combination.

  Next, the salt water-absorbing resin is not particularly limited as long as it is a resin that absorbs salt water and gels (swells). Specifically, poly (meth) acrylate polymer, copolymer of poly (meth) acrylate polymer and hydrophilic compound having unsaturated double bond, starch and poly (meth) acrylate Of poly (meth) acrylamide resin, copolymer of poly (meth) acrylamide resin and hydrophilic compound having unsaturated double bond, starch and poly (meth) acrylamide resin Examples thereof include powders of synthetic salt-absorbing aqueous resins such as copolymers, and natural salt-absorbing water-based resins such as starch, cellulose, and natural gum polymers (xanthan gum, locust bean gum, guar gum, etc.). It can be used as a seed or a mixture of three or more. In the present specification, “(meth) acrylic acid” is a generic term for acrylic acid and methacrylic acid, and the same applies to other similar terms.

  For example, in the case of a sodium acrylate polymer cross-linked product, the water absorption amount of a water-absorbing resin used conventionally is about 500 times its own weight in pure water, about 300 times in tap water, about 50 times in urine and physiological saline, In seawater, about 7 times, as the salt concentration increases, the water absorption rate decreases remarkably. This is because the superabsorbent polymer cannot be ionically dissociated due to the presence of ions caused by salts, and repulsion due to charging of the polymer chain (for example, in the case of a sodium acrylate-based polymer cross-linked product, it has a sodium carboxylate group that is easily ionized. Therefore, when water enters the network of the polymer chain, sodium ions in the sodium carboxylate group dissociate, and the carbonyl groups remaining in the polymer chain are electrically repelled by negative ions. )) Explains that the expansion of the mesh does not occur. In particular, polyvalent metal ions such as calcium salts, magnesium salts, and aluminum salts are incorporated into and bonded to the superabsorbent polymer, so that the water absorption ratio is greatly reduced and a massive crystal is formed. Cause problems.

  The synthetic salt water-absorbing resin is obtained by improving the disadvantage that the water-absorbing resin has a low salt water-absorbing ability, and is a highly water-absorbing polymer having a dissociation group that hardly takes in polyvalent metal ions. That is, a hydrophilic group other than a carboxyl group or a hydroxyl group, such as a sulfonic acid group, a sulfate group, or a phosphoric acid group, is introduced into the superabsorbent polymer. Specifically, the hydrophilic polymer itself before cross-linking is incorporated into the superabsorbent polymer. A method of introducing a sulfonic acid group (JP-A 61-36309, JP-A 60-55011), a method of introducing a phosphoric acid group (JP-A 55-15634), or a hydrophilic polymer crosslinking agent ( Diglycidyl ether, ethylenediamine, succinic acid, hexamethylene diisocyanate, etc., which is an epoxy group that reacts with a carboxyl group, an amino group, a hydroxyl group that reacts with a hydroxyl group, a polyfunctional compound having two or more functional groups such as an isocyanate group) There is a method of adding a sulfonic acid group to form a superabsorbent polymer (Japanese Patent Laid-Open No. 57-42765).

  The starch is a mixture of a linear polymer (amylose) and a branched polymer (amylopectin) of α-glucopyranose units. For example, starch compounds such as etherified starch, esterified starch, cross-linked starch, α-starch These can be used alone or as a mixture of two or more. Specific examples include wheat, corn, potato, sweet potato starch, etc., which can be used in any type, but preferably has a high performance of absorbing salt water and increasing its viscosity. Potato starch and sweet potato starch are preferred.

  The salt water raw material used for preparing the salt water-containing gel using the salt water-absorbing resin may be any material that dissolves in the salt water-absorbing resin and gels, such as calcium chloride, sodium chloride, magnesium chloride, Aluminum chloride, magnesium sulfate, aluminum sulfate, calcium sulfate and the like can be mentioned, and these can be used alone or as a mixture of two or more. Moreover, the hydrate of these salt water raw materials is preferable from points, such as handling.

  The concentration of the salt water used for preparing the salt-containing water gel using the salt water-absorbing resin is preferably in the range of 7 to 50 parts by mass of the salt water raw material with respect to 100 parts by mass of water. In this concentration range, it is possible to set the warming temperature to a warm temperature, for example, a temperature close to body temperature (temperature range within 10 ° C. including the body temperature range), and the temperature range is maintained for a long time. In addition, it is possible to provide a heat-insulating package that gives a feeling of use such as a tactile sensation that does not cause a sense of incongruity to the affected part of the body and a thermal feeling that the temperature is transmitted gently. If it is less than the lower limit of the above range, it is applied to a higher heating temperature. On the other hand, if it exceeds the upper limit, mixing with the heat generating agent and heat generation take time, which is not preferable. Also, increasing the concentration does not extend the duration. Furthermore, the range which consists of 10-30 mass parts of salt water raw materials with respect to 100 mass parts of water is more preferable.

Although the usage-amount of the salt water absorptive resin used for the gelatinization of the said salt water changes a little with salt water concentration, it is 3-15 mass parts with respect to 100 mass parts of water, Preferably it is 4-10 mass parts.
If it is less than the lower limit of the above range, a gel close to a liquid state is produced or gelation is not preferable. On the other hand, if the above upper limit is exceeded, the gel becomes hard and mixing with the heat generating agent takes time, which is not preferable.

The ratio of the salt-containing water gel (or the internal volume of the storage part B) and the heat generating agent (or the internal volume of the storage part A) is exothermic with respect to 100 parts by weight of the salt-containing water gel (or the internal volume of the storage part B). It is preferable that it is in the range of 20 to 100 parts by mass (or the internal capacity of the accommodating part A). Within the range of the blending ratio, a heat-insulating package having a large surface area to be heated can be obtained, and there is an advantage that it can be applied to use scenes where the affected area is wide and the number of sheets used can be reduced.
The surface area (surface to be heated) of the heat insulating package depends on the volumes of the two storage units, but the volume mainly depends on the volume of the storage unit B. That is, the amount of the salt-containing water gel in the storage part B can be increased with respect to the amount of the heat generating agent in the storage part A, and the capacity can be increased. it can.
If the temperature is less than the lower limit of the above range, the heating temperature is lowered, the temperature decreasing rate is increased, and the heating duration is shortened, which is not preferable. On the other hand, even if the above upper limit is exceeded, almost no change is observed in the heating temperature and / or duration, and any further blending is useless.
Further, the blending ratio is more preferably in the range of 30 to 70 parts by mass of the exothermic agent with respect to 100 parts by mass of the salt-containing water gel. Within this range, the temperature decrease is slow and the set temperature range is maintained for a long time. be able to.

  The two sheets used for making the heated package may be made of the same material, but in this case, it is not possible to select a feeling of warmth or touch with the same heated package. In the suitable aspect which can select a feeling of heat, the touch, etc. with the same heating package body, the both sides | surfaces of a bag body are comprised from two sheet materials from which a material differs. That is, in the bag formed by firmly sealing the periphery of two sheets having different thermal conductivities and / or tactile sensations, two accommodating portions that can communicate with each other by applying force from the outside are provided, Constitutes a bag body which is detachably bonded at a predetermined fraction bonding portion and divided into two housing portions. In this case, since it is composed of a combination of two sheet materials having different thermal conductivities and tactile sensations, a rapid warming feeling or gentle heating can be achieved by selecting the sheet surface and pressing it against the mounted part such as the affected part. A warm feeling can be selected, and a touch etc. can be selected. In addition, by applying different sheet surfaces having different thermal conductivities, tactile sensations, and the like to the affected area and the like alternately, it is possible to obtain a thermal sensation different from the conventional one.

Hereinafter, a suitable bag structure will be described with reference to the accompanying drawings.
1 and 2 show one embodiment of a bag structure used in the heat insulation package of the present invention, and the four peripheral portions of two sheet materials 1 and 2 having water resistance and heat resistance, respectively, are tightly sealed. And can be peeled off by applying force from the outside in the fractional bonding part 3 so as to be divided into left and right according to the blending ratio of the heat generating agent and the salt water gel. It is a bag body bonded and partitioned into two housing parts A and B.
At least one type of exothermic agent that dissolves in water and undergoes an exothermic chemical reaction as described above is accommodated in one accommodating portion A of the bag body, and a salt-containing water gel is accommodated in the other accommodating portion B. In addition, the powder of the salt water-absorbing resin may be accommodated in the one accommodating portion A together with the exothermic agent, and water that is not hydrated in the salt-containing water gel coexists in the accommodating portion B. It doesn't matter.
In use, exothermic reaction is achieved by exfoliating the fraction-adhering part 3 and connecting the two accommodating parts A and B by mixing the contents well by applying external force such as pinching the package by hand. To start.

  On the other hand, FIG. 3 shows another embodiment of the bag structure used for the heat-insulating package of the present invention, in which the four peripheral portions of the two sheet materials 1 and 2 having water resistance and heat resistance are strengthened, respectively. The bag formed by sealing is the same as the embodiment shown in FIGS. 1 and 2, but in the case of this embodiment, a water-resistant film or thin paper between the two sheet materials 1 and 2 is used. The bag body is provided with an easily ruptured separation sheet 4 and the like, and is divided into upper and lower parts and divided into upper and lower housing parts A and B. Similar to the above-described embodiment, at least one kind of exothermic agent is accommodated in one accommodating portion A, and a salt-containing water gel is accommodated in the other accommodating portion B.

  The two sheets 1 and 2 may be made of the same material, but preferably two sheets having different thermal conductivities and / or tactile sensations are used. Specifically, one sheet material 1 is made of a single layer or composite layer plastic film having water resistance and heat resistance, or a composite layer plastic film sandwiched with aluminum foil, and the other sheet material 2 has a resin on the inner surface side. Made of resin or cotton non-woven fabric, cloth or paper, or single layer or composite layer plastic film with water resistance and heat resistance whose outer surface is flocked or raised, or composite layer plastic film sandwiched with aluminum foil The Here, the “composite layer” refers to a laminate in which a plurality of the same or different types of sheet materials are laminated. When a sheet material other than a plastic film is used as a constituent material, the inner surface is provided to provide heat sealability. The side is laminated with resin. In the case of a composite layer, the sheet material used in the present invention is referred to as a composite layer plastic film including a case where a sheet material other than a plastic film is used as a constituent material because at least the inner surface side is composed of a resin film. In addition, examples of the sheet material on which the outer surface side is flocked include those in which fine plastic fibers are flocked on the film surface by dielectric welding or the like, and examples of the sheet material on which the outer surface side is raised include a nonwoven fabric, a cloth, and the like. All have a soft touch.

  As a more specific combination example of the two sheet materials 1 and 2 having different thermal conductivities and / or tactile sensations, biaxially oriented polypropylene / polyvinylidene / low density polyethylene, biaxially oriented polyester / ever, low pressure・ Low density polyethylene, biaxially stretched polyester / polyvinylidene / low density polyethylene, biaxially stretched polyester / low density polyethylene / aluminum foil / low density polyethylene, biaxially stretched nylon / polyvinylidene / low pressure, low density polyethylene, normal cellophane / A sheet having a flat surface composed of low density polyethylene, biaxially oriented polypropylene / eval / low density polyethylene, etc .; a sheet obtained by laminating polyethylene on a polyester spunbond nonwoven fabric, and a sheet obtained by laminating polyethylene on a polypropylene spunbond nonwoven fabric A combination of a sheet with a rough surface such as a sheet laminated with polyethylene on a nonwoven fabric made of pulp fiber, a sheet laminated with polyethylene on a nylon spunbond nonwoven fabric, or a sheet laminated with polyethylene on a cotton spunbond nonwoven fabric. It is done.

  By using two sheet materials having different properties as described above, it is possible to select thermal feeling and touch. For example, a resin or cotton nonwoven fabric in which a rapid heating effect is obtained by pressing the sheet surface of a sheet material 1 made of a single-layer or composite-layer plastic film against a required portion, and the inner surface side is laminated with a resin. Pressing the sheet surface of the sheet material 2 having a low thermal conductivity and / or soft touch made of a cloth or paper, or a single-layer or composite-layer plastic film in which the outer surface side is flocked or raised, to the required part Can be warmed gently.

  The heat-insulating package of the present invention is further made from a resin or cotton nonwoven fabric, cloth or paper laminated with resin on the inner surface side, or a single layer or composite layer plastic film in which the outer surface side is flocked or raised, as desired. A volatile perfume or essential oil may be attached to or applied to the sheet material 2. By attaching or applying a fragrance or essential oil having volatility in this way, it is possible to give the user a feeling of peace due to the scent.

  The heat insulation package of the present invention is not limited to the one having the structure as described above, and has, for example, a double bag structure of an inner bag and an outer bag, and the salt-containing water gel is accommodated in the inner bag. A structure in which the heat generating agent is accommodated in the accommodating portion between the bag and the outer bag, or an accommodation mode opposite to this may be employed. In such a structure, the inner bag is made of an easily breakable water-resistant plastic film, and the outer bag is a single layer or composite layer plastic film, or a resin or cotton non-woven fabric or cloth whose inner surface is laminated with a resin. Or what is necessary is just to produce from the single layer or composite layer plastic film which has water resistance and heat resistance by which the outer surface side was flocked or raised.

In addition, when the blending ratio of the exothermic agent is small, by providing a plurality of exothermic agent accommodating portions, it is easy to mix the entire salt-containing water gel, and the temperature can be raised quickly. Further, the exothermic agent can contribute to the exothermic reaction without waste. For example, the storage part A is provided on both sides of the storage part B for storing the salt water gel to store the heat generating agent, or the four storage parts A are provided at the square part of the storage part B for storing the salt water gel. An exothermic agent can also be accommodated.
Furthermore, by providing a plurality of compartments having the accommodating portions A and B in the heat insulation package, a heat insulation package having a larger total surface area can be obtained, leading to expansion of the use scene. Moreover, as the heat insulation package is enlarged, it becomes difficult to mix the exothermic agent and the salt-containing water gel, and in this case, the difficulty of mixing can be solved by connecting and increasing the size of the easy-to-mix sections. For example, it is the aspect which the accommodating part connected with A / B / B / A.

Moreover, since the warming surface becomes loose as the heat insulation package is enlarged, it becomes difficult to use it correctly on the affected surface. In this case, it is possible to eliminate the slack by connecting the housing portions having a size and shape that does not loosen, thereby increasing the heating efficiency of the affected area and facilitating the handling thereof. For example, the shape of the accommodating portion A is a triangular shape that bites into the accommodating portion B, the shape of the fraction bonding portion is not a straight line, but a zigzag shape, or each accommodating portion is horizontally long so that the long side portions are in contact with each other. Various aspects such as an aspect in which a plurality of accommodating parts are fractionated (for example, arrangement of accommodating parts B / A / B) can be adopted.
Furthermore, it can employ | adopt as a heat insulation package provided with the some heating function as a reserve. For example, after a pair of accommodating portions are communicated and used, if the usage time is extended against a schedule, another pair of accommodating portions can be communicated and continuously used.

  Hereinafter, the present invention will be described more specifically with reference to examples (test examples) in which the effects of the present invention have been specifically confirmed. However, the present invention is not limited to the following examples.

Test Example 1 (Heat Keeping Condition of Warm Package by Changing Salt Water Concentration of Salt Water Gel)
A bag body having two housing parts A and B with the substantially center bonded in a peelable manner as shown in FIGS. 1 and 2 is prepared, and as shown in Table 1, calcium chloride 2 is used as a heat generating agent in the housing part A. Containing water salt granules, and using calcium chloride dihydrate as the salt water raw material of the salt-containing water gel that reacts exothermically with the exothermic agent, and containing each salt water concentration obtained by changing the amount used. The salt-containing water gel was accommodated, and the exothermic state when the contents of both accommodating portions were mixed was examined.

The exothermic test was conducted as follows.
Exothermic test: In a thermostatic chamber at room temperature of 25 ° C., external pressure is applied to each heat insulation package produced as described above to peel off the adhesion at the center, and the contents of both containers are mixed well for 40 seconds, and the heat insulation package Was placed on the table, the center of the heat insulation package was folded, a thermometer was inserted between them, and the temperature change was measured. FIG. 4 shows a graph of temperature change over time (up to 120 minutes) based on the average value of three tests. It should be noted that the time required for the 10 ° C. drop is the test No. 1 for about 100 minutes. 2 for about 130 minutes, test no. 3 for about 145 minutes, test no. 4 for about 170 minutes, test no. 5-No. 8 was over 190 minutes.

  As is clear from the results shown in FIG. No. 8 to test no. As the salt water concentration decreases in the order of 1, the heating temperature increases and the temperature decreasing rate tends to increase. 1 to test no. As the salt water concentration increased in the order of 8, the heating temperature gradually decreased, and the temperature decreasing rate tended to be gentle. For example, test no. In Nos. 2, 3 and 4, test no. In 5-8, 3 hours or more were required, and the result which maintained heating temperature for a long time was obtained. In addition, Test No. 7 to test no. As the salt water concentration increased with 8, the hardness of the gel increased and it took longer to mix with the exothermic agent.

Test example 2
In Test Example 1, magnesium chloride hydrate was used instead of calcium chloride dihydrate, and the exothermic state at each salt concentration shown in Table 2 was examined in the same manner as described above. FIG. 5 shows a graph of temperature change over time (up to 120 minutes) based on the average value of three tests. It should be noted that the time required for the 10 ° C. drop is the test No. 9 for about 145 minutes, test no. 10 for about 175 minutes, test no. 11-No. 15 was 180 minutes or more, and showed a tendency to be longer than when calcium chloride dihydrate was used as a whole.

  As is clear from the results shown in FIG. 15 to test no. As the salt water concentration decreases in the order of 9, the heating temperature increases. No. 9 to test no. As the salt water concentration increased in the order of 15, the heating temperature gradually decreased, and the temperature decreasing rate tended to be gentle. For example, test no. In Nos. 9 and 10, test no. In 11-15, 3 hours or more were required, and the result which maintained heating temperature for a long time was obtained.

Test Example 3 (Insulation status of the insulation package by changing the amount of salt water-absorbing resin added)
Test No. 1 used in Test Example 1 above. As shown in Table 3, for the prescriptions 2, 4, and 7, the gel state in the housing part B due to the change in the amount of salt water-absorbing resin added and the gel state during mixing in which both housing parts were communicated were visually evaluated. did. Moreover, the temperature change at the time of heat_generation | fever was also investigated. The exothermic test is the same as the above test, and FIG. 6 shows a graph of the change in temperature over time (up to 120 minutes) based on the average value of the number of tests three times.

  Regarding the state of the gel, Test No. When the use amount of the salt water-absorbing resin of 16, 17, 20, 23 is small, the gel shows a shabu-shave state. 16 was almost in a liquid state. On the other hand, test no. As the amount of the salt water-absorbing resin used was increased as in 19, 22 and 25, the gel became harder and it took time to mix with the exothermic agent. Moreover, the formation state of these gels was not influenced by the salt water concentration, and showed the same phenomenon.

Test Example 4 (Heat insulation state of the heat insulation package according to the blending ratio of the exothermic agent and the salt-containing water gel)
Test No. 1 used in Test Example 1 above. As shown in Table 4, using the contents of the storage part B in No. 6, the amount of the exothermic agent contained in the calcium chloride dihydrate in the storage part A was changed, and during the heat generation due to the blending ratio of the exothermic agent and the salt-containing water gel. The temperature change was examined. The exothermic test is the same as the above test, and FIG. 7 shows a graph of the temperature change over time (up to 120 minutes) based on the average value of the number of tests three times.

  As is clear from the results shown in FIG. 7, the heating temperature decreases as the amount of the heat generating agent in the storage portion A decreases, so that the test no. In 26 (about 15 parts by mass with respect to 100 parts by mass of the salt-containing water gel), the heating temperature did not reach the body temperature. On the other hand, when the amount of the exothermic agent is increased, the test No. No. 27 (about 20 parts by mass with respect to 100 parts by mass of the salt-containing water gel). The heating temperature increased in the order of 32 (about 70 parts by mass with respect to 100 parts by mass of the salt-containing water gel). In addition, Test No. As apparent from the results of 33 and 34 (about 80 parts by mass and 100 parts by mass with respect to 100 parts by mass of the salt-containing water gel, respectively), the exothermic agent does not dissolve and the heating temperature rises even if the amount is increased further. No longer.

  By using the heat insulation package of the present invention, it has good adhesion when pressed directly onto the skin and fits evenly on the uneven surface, and transfers the heat of the heat insulation package to the skin uniformly and over the entire surface. Can heat eyes, feet, etc., give moderate heat stimulation to improve blood circulation and eliminate fatigue, and can be used for various purposes as a simple warming bag, for example, for simple heating of affected areas be able to. . In addition, the improvement of the blood circulation of the affected area that is chronically in a state of poor blood circulation, and the direct improvement of the blood circulation of the affected area by heating, together with the normalization of the blood circulation insufficiency state, removal of chronic pain or Relaxation can also be achieved. Furthermore, since the heat insulation package of the present invention is convenient to carry, it is useful as a warming bag for leisure and emergency use.

It is a schematic sectional drawing which shows one embodiment of the heat insulation package of this invention. It is a schematic plan view of the heat insulation package shown in FIG. It is a schematic sectional drawing which shows the other embodiment of the heat insulation package of this invention. 4 is a graph showing temperature changes with time of each heat insulating package produced in Test Example 1. FIG. 6 is a graph showing a change in temperature over time of each heat insulation package produced in Test Example 2. FIG. 5 is a graph showing temperature changes with time of each heat insulating package produced in Test Example 3. FIG. 10 is a graph showing temperature changes with time of each heat insulating package produced in Test Example 4. FIG.

Explanation of symbols

1, 2 Sheet material 3 Fraction adhesion part 4 Separation sheet A, B accommodation part

Claims (4)

In one container part A of the bag body having at least two container parts that can communicate with each other by applying force from the outside, powder or granules of the exothermic agent that dissolves in water and undergoes an exothermic chemical reaction is contained, and the other the housing portion B, it houses a chlorine water gel having a viscosity concentration of salt water gelled brine in the range of salt water feed 7 to 50 parts by mass with brine absorbent resin with respect to 100 parts by mass of water, containing A heat-retaining package , wherein the blending ratio of the salt water gel and the heat generating agent is in the range of 20 to 100 parts by weight of the heat generating agent with respect to 100 parts by weight of the salt water-containing gel . The bag body is a bag body formed by firmly sealing the periphery of two sheet materials having different thermal conductivities and / or tactile sensations, and can be peeled off at a predetermined fraction bonding portion. The heat insulating package according to claim 1, wherein the package is a bag body partitioned into at least two storage portions. One side surface of the bag body is made of a single layer or composite layer plastic film having water resistance and heat resistance, or a composite layer plastic film sandwiched with aluminum foil, and the other side surface is a resin laminated on the inner surface side with a resin or 3. A heat-insulating package according to claim 1 or 2 , which is made of a cotton non-woven fabric, cloth or paper, or a water-resistant or heat-resistant single layer or composite layer plastic film in which the outer surface is flocked or raised. body. The usage-amount of the salt water absorptive resin used for the gelatinization of the said salt water exists in the range of 3-15 mass parts with respect to 100 mass parts of water, The Claim 1 thru | or 3 characterized by the above-mentioned. Thermal insulation package.

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