JP5107980B2 - Thermal storage pack for cold insulation - Google Patents

Description

  The present invention is a cold pack that is bundled when packaging fresh food, or a cold pack that is attached to clothes, hats, helmets, car seats, etc., and is used for giving a cool feeling to human bodies and pets, Alternatively, the present invention relates to a heat insulation pack (heat storage pack for cold insulation) used for heating foods, human bodies, pet animals, and the like.

  At present, most of the products that are distributed in the market as cryogens such as fresh foods are made by packing a gel-like substance in a flexible bag (such as a plastic bag or a polyethylene bag). The conventional cryogen using a gel-like substance can maintain the cool effect for a long time compared to a liquid (for example, water) packed, and a hole has been opened in the exterior (pack). Even in this case, there is an advantage that the contents are not easily leaked.

JP-A-5-86361 Japanese Patent Publication No. 5-8663 JP 2006-141272 A

  The cryogen is frozen in advance by storing it in a freezer for at least 1 hour and used in that state, but a conventional cryogen is a general freezer for home use (about -10 ° C). If it is stored for about 1 hour, it will freeze hard.

  If the cryogen is hard and frozen, the storage space cannot be secured in the container (for example, a polystyrene foam container) that is intended to wrap the object to be cooled, and may not be bundled. . In addition, if one surface of the cold insulation agent can be made to follow one surface of the cold insulation object (the surface to be kept cold), a higher cold insulation effect can be expected, but the cold insulation agent has been frozen hard. In this case, it becomes difficult to follow the surface to be kept cold.

  Furthermore, the conventional cooling agent cannot be thrown away as combustible waste or garbage, and needs to be collected separately as incombustible waste. In addition, when used on infants and pets, there is a risk of accidentally swallowing the contents of the cryogen, so if it contains toxic substances, use it on infants and pets. Should not do.

  The present invention has been made to solve the problems of the prior art as described above, and is flexible even when cooled under a considerably low temperature condition. It is intended to provide a heat storage agent pack for cold and heat insulation that can be easily followed in any shape and can be used safely even when targeting infants and pets. .

  The heat storage agent pack for cold insulation according to the present invention is a mixture of alkaline water having a pH of 12 to 13 and raw egg yolk corresponding to 4.5 to 5.5 times the weight of the alkaline water. While maintaining the temperature in the range of 20 to 30 ° C., the mixture is stirred until alkaline water and raw egg yolk are mixed, and this stirred mixture has a carbohydrate corresponding to 0.9 to 1.1 times the weight of the raw egg yolk. Is added, and the paste-like substance produced by stirring for at least 1 hour is kept in a flexible bag while keeping it in the range of 80 to 90 ° C. under the condition of 1 to 10 atm. It is characterized by that.

  The heat storage agent pack for cold insulation according to the present invention has a characteristic that a paste-like substance enclosed in a bag does not freeze under a low temperature condition of −30 ° C. and has flexibility. Therefore, for example, when trying to wrap a cold object, even if it is not possible to ensure a sufficient space for storing the cold agent in the container, it corresponds to the shape of the gap between the cold object and the container. By making it deform | transform, it can be anticipated that the enclosure in a container is attained.

  In addition, it can be easily followed regardless of the shape of the surface to be cooled, and a high cooling effect can be expected. Furthermore, since the heat storage agent pack for heat insulation and heat retention according to the present invention is formed by enclosing an edible material, it can be disposed of as combustible or garbage. Moreover, even if the contents are accidentally swallowed, there is no problem at all. Therefore, it can be used extremely safely for infants and pets.

  Here, the form for implementing this invention is demonstrated. The heat storage agent pack for cold insulation according to the present invention is a mixture of alkaline water having a pH of 12 to 13 and raw egg yolk corresponding to 4.5 to 5.5 times the weight of the alkaline water. While maintaining the temperature in the range of 20 to 30 ° C., the mixture is stirred until the alkaline water and the raw egg yolk are mixed, and a saccharide corresponding to 0.9 to 1.1 times the weight of the raw egg yolk is added to the stirred mixture. After the addition, the paste-like substance produced by stirring for at least 1 hour while keeping the temperature in the range of 80 to 90 ° C. under the condition of 1 to 10 atm is sealed in a flexible bag. It will be.

  In the present embodiment, as the paste-like substance to be enclosed in the bag, one manufactured by the manufacturing method described in Japanese Patent No. 4185040 (emulsifier for food addition) is used. In the production of the paste-like substance, it is preferable to use “alkaline water having a pH of 12 to 13” produced by the method described in JP-A-8-24865.

  The heat-retaining agent pack for cold and heat retention according to the present invention can be used as a cold-reservoir pack by storing it in a freezer for a predetermined time or more in advance and cooling it, or by preheating it with a hot water bath or the like. Can be used as a heat insulation pack. Hereinafter, an example (Example 1) in the case of using the present invention as a cryogen pack and an example (Example 2) in the case of using as a heat insulating pack will be described.

  Initially, an example of the manufacturing method of the paste-like substance used for the heat storage agent pack for cold insulation heat according to the present invention will be described. First, 200 g of alkaline water having a pH of 12.5 and 1000 g of raw egg yolk are prepared, and these are put in a container and mixed, and the mixture is stirred while being kept in the range of 20 to 30 ° C. Then, while stirring this mixture, 1000 g of sucrose is added little by little. The mixture to which sucrose has been added is placed in a pressure vessel and stirred for 80 minutes while maintaining the temperature at 85 ° C. under the condition of 5 atm. Then, when this is strained with a net, a paste-like substance having a semi-denatured egg yolk component is obtained.

  The paste-like material thus produced is filled into a flexible bag (for example, a plastic bag, a polyethylene bag, etc.) and sealed to obtain a heat storage pack for cold insulation. Here, sucrose is used as the added sugar, but the sugar is not limited to this, and glucose, trehalose and the like can also be used.

  When using this heat storage agent pack for cold insulation as a cold insulation pack, it cools for a predetermined time (at least 1 hour or more) in a freezer set to -5 to -30 ° C, and then takes it out.

  Here, the specific example in the case of using the thermal insulation agent pack for cold insulation warming which concerns on this invention as a cryogen pack and its effect are demonstrated. This heat storage agent pack for cold and heat insulation is bundled when fresh food is stored in a cold storage container (such as a polystyrene foam container or a cooler box) in the same manner as a conventional cold storage pack. At this time, since the heat-reserving agent pack for cold and warming according to the present invention has flexibility even when cooled to −30 ° C., even in a case where sufficient space cannot be secured in the cold-keeping container. (For example, when the cold pack is hard and frozen, even if it cannot be inserted into the gap between the cold container and the fresh food), it can be appropriately deformed according to the shape of the gap. , The possibility of insertion is increased. In order to maintain the cold insulation effect for a longer period of time, it is necessary to use a larger refrigerant pack, but the larger the refrigerant pack used, the more serious the problem that it becomes impossible to store in the cold container. Therefore, the effect which can be expected in the heat storage agent pack for cold insulation according to the present invention becomes more prominent as a larger size of the cold insulation pack is required.

  In addition, when the heat storage agent pack for cold insulation and warming according to the present invention is used for cold preservation of foods and drinks contained in cylindrical cans and bottles, the cold insulation is maintained along the outer peripheral surface of the cans and bottles. By appropriately deforming the heat storage agent pack for use, it is possible to follow and adhere to the target surface, so that a higher cold insulation effect can be expected. For example, in recent years, plastic bottle-specific cold bags that are formed in a shape and size that can accommodate just one plastic bottle using a highly heat-insulating material have been supplied to the market. Since the heat storage agent pack for cold insulation can be easily inserted between the PET bottle and the dedicated cold insulation bag, it can be suitably used as a more effective cold insulation means by combining with the cold insulation bag. .

  Furthermore, the heat-retaining agent pack for cold insulation and warming according to the present invention can be used as a means for giving a cool feeling to a human body or a pet and cooling down. For example, by forming pockets on vests, belts, hats, headbands, helmets, etc., and storing the heat-reserving packs for cold and warm insulation in those pockets, under hot weather or other severe temperature conditions The body temperature of an exposed worker or the like can be suitably lowered to give a cool feeling.

  Thus, when using as a cold preservation pack, it can be used repeatedly many times. Moreover, since the enclosed paste-like substance is edible, it is safe and can be used safely even when used for infants and pets.

  Next, the test results conducted by the inventor of the present invention will be described with respect to the cold insulation effect of the heat storage agent pack for cold insulation. First, 500 g of a paste-like substance produced by the above method was sealed in a plastic bag (Example A), and 100 g of the paste-like substance sealed in a plastic bag (Example B) were prepared. A was cooled to −10 ° C., and Example B was cooled to −4 ° C. and left in a room maintained at an air temperature of 28 ° C., and the temperature was measured every unit time (10 minutes). We examined changes. The results are shown in the following table.

  When the cryogen pack is used for the purpose of suitably lowering the body temperature of workers, pets, etc. and giving a cool feeling, it is effective if the temperature of the cryogen pack is about 23 ° C. From the above measurement results, for Example A in which 500 g of a paste-like substance was sealed, the sample was cooled to −10 ° C. and room temperature was obtained. Even when used in a space with a relatively high temperature condition of 28 ° C., it was found that the effect lasts for about 100 minutes. Moreover, about Example B which enclosed 100-g pasty substance, when it cooled to -4 degreeC, it turned out that an effect lasts for about 60 minutes.

  Furthermore, Example A was cooled to −23.9 ° C. and Example B was cooled to −21.4 ° C. and left in a room kept at an air temperature of 23 ° C., and the temperature was changed every unit time (5 minutes). Was measured and the temperature change with time was examined. The results are shown in the following table.

  When the cryogen pack is used for cold storage of fresh food or the like, it is desirable that the temperature of the cryogen pack is 10 ° C. or less. From the above measurement results, for Example A in which 500 g of a paste-like substance is enclosed, It was found that if cooled to −23.9 ° C., a sufficient cooling effect is maintained for at least 60 minutes or more even when used in a space with a room temperature of 23 ° C. Therefore, when stored in a cool box such as a cooler box, it is considered that the cool effect can be maintained for a longer time. If it does so, it will be said that the thermal storage agent pack for cold preservation heat retention which concerns on this invention can fully be used also as a commercial cryogen pack used for cold preservation, such as fresh food. On the other hand, Example B in which 100 g of paste-like substance was sealed was cooled to −21.4 ° C., and when used in a space with a temperature condition of room temperature 23 ° C., it exceeded 10 ° C. before 25 minutes. Therefore, when used alone, it is not always possible to expect a sufficient cooling effect as a commercial cryogen pack for keeping fresh food, but when used in combination with Example A , You can expect some effect.

  Next, the inventor of the present invention relates to the fact that the heat storage agent pack for cold and thermal insulation according to the present invention has a characteristic that it does not freeze under a low temperature condition of −30 ° C. and has flexibility. The test results will be described. First, the above Example A and a commercially available general cold pack (comparative example) are prepared, and the elasticity when these are cooled (a plunger with a diameter of 1.6 cm is moved inward from the surface of the object. The stress applied when entering 1 mm) was measured with a rheometer (elasticity measuring device). For reference, elasticity was also measured for Example A before cooling and a comparative example (which was left in a room at 25 ° C. for 1 hour). The results are shown in the following table. In addition, cooling was performed by storing Example A and the comparative example for 1 hour in a freezer set to room temperature shown in the temperature column of the following table.

  From this test result, it was proved that Example A of the present invention still has elasticity even when stored in a freezer at −30 ° C. for 1 hour, does not freeze, and has flexibility. It was done. On the other hand, as for the comparative example, if it is stored in a freezer at −30 ° C. for 1 hour, it completely freezes, and even when the maximum load (1 kg) of the used rheometer is applied, the plunger can be allowed to enter from the surface to the inside. It was not possible to measure elasticity. The same was true at −20 ° C.

  When using the heat storage agent pack for cold insulation according to the present invention as a heat insulation pack, for example, it can be used as a scallop by warming it with a hot water bath and storing it in a pocket of clothing. Moreover, a lunch box can be heat-retained for a fixed period of time by sticking the warmed heat-retaining heat storage pack to a lunch box and wrapping it with a packaging material. Thus, when using as a heat insulating agent pack, it can be used repeatedly many times.

Claims (1)

  The alkaline water showing pH 12 to 13 and raw egg yolk corresponding to 4.5 to 5.5 times the weight of the alkaline water are mixed, and the temperature of the mixture is kept in the range of 20 to 30 ° C. The mixture is stirred until alkaline water and the raw egg yolk are mixed, and a saccharide corresponding to 0.9 to 1.1 times the weight of the raw egg yolk is added to the stirred mixture. Under the above conditions, a paste-like substance produced by stirring for at least one hour while maintaining the temperature in the range of 80 to 90 ° C. is enclosed in a flexible bag, and the heat storage agent pack for cold and warm insulation .