JP5452106B2 - Cooling sheet and method for manufacturing cooling sheet - Google Patents

Description

  The present invention relates to a cooling sheet using a cooling agent and a manufacturing method thereof, and more particularly to a cooling sheet that can be brought into contact with various curved surfaces such as a human forehead and elbows in a frozen state and a manufacturing method thereof.

  Conventionally, a flat cooling pack in which water and a water-absorbing polymer are mixed and gelled at room temperature is used as a cryogen, and this is sealed in a bag body such as a film. Three types of such cooling packs are known: those that are cooled, those that are cooled in a freezer but not frozen, and those that are frozen and used in a freezer. Among them, the cooling pack used by freezing can be used for a longer time than the other types of cooling packs due to the latent heat of melting from 0 ° C. ice to 0 ° C. water. This cooling pack is used, for example, for preserving perishable foods or for cooling human heads, elbows, etc. for heat cooling or sports icing.

  On the other hand, the freezing type cooling sheet that can be used for a long time is a mode in which a cold insulation agent is filled in one bag body, so it is hardened into a flat plate shape when frozen and can be used in deformation. For example, it is not suitable for use on a cooling object having a curved surface, such as a forehead or an elbow.

  By the way, as a cooling pack that can be effectively brought into contact with a cooling target having a curved surface, a large number of pocket-shaped sachets arranged in a grid pattern are formed on the surface of a strip-shaped sheet body made of towel cloth, A cooling towel has been proposed in which a small-size cooling sheet is accommodated in the sachet (for example, Patent Document 1). In this cooling towel, since the connecting portion connecting between the pouch portions is towel cloth, it can be brought into contact with the curved surface to be cooled in use.

Registered Utility Model No. 3009469

  However, the cooling towel of Patent Document 1 needs to take out the cooling sheet from the sachet portion, freeze it, and store it again in the storage portion during use in order to prevent the towel cloth portion constituting the sheet body from hardening due to freezing. There is. Therefore, it takes a lot of work to use.

  Further, in the manufacture of the cooling towel disclosed in Patent Document 1, a cooling pack manufacturing process in which a cooling agent is formed using a mold and sealed in the bag body, and a large number of pockets are formed on the surface of the sheet body made of towel cloth. It is necessary to perform a process of forming a cooling pack fixing means on the sheet body to form a small sachet portion, and it takes time to manufacture compared to the manufacture of a normal cooling pack.

  The present invention has been made based on such circumstances, and can be used so as to be easily brought into contact with a cooling object having a curved surface, and can be easily manufactured with the same trouble as a normal cooling pack. It is an object to provide a cooling sheet that can be produced and a method for producing the cooling sheet.

As one aspect of the present invention, the present invention comprises a plurality of convex cold storage units arranged continuously through a thin wall portion,
A cold storage part and a thin part are related with the strip | belt-shaped cooling sheet | seat characterized by being the integrally molded object integrally shape | molded with the cold insulating agent which has a gel-like form at normal temperature.

  Further, as another aspect of the present invention, the present invention includes a plurality of convex cold storage units arranged continuously through a thin portion, and the cold storage portion and the thin wall portion have a gel-like form at room temperature. The present invention relates to a belt-like cooling sheet, which is an integrally formed body in which a thin-wall portion is a base material having flexibility and the cold storage portion and the thin-wall portion are integrally formed.

  Moreover, as another aspect of the present invention, the present invention includes a plurality of convex cold storage units arranged continuously through a thin portion, and a package that houses the cold storage portion and the thin portion, and the cold storage portion and the thin portion are In addition, the present invention relates to a belt-like cooling sheet, which is an integrally formed body integrally formed with a cold insulating agent, and the package body can hold the outer shape of the integrally formed body.

  Further, as another aspect of the present invention, the present invention includes a plurality of convex cold storage units arranged continuously through a thin portion, a thin portion and a packaging body that houses the cold storage portion, and the cold storage portion and the thin portion Is a unitary molded body in which the cold storage part is a cold insulator, the thin part is a flexible base material, and the cold storage part and the thin part are integrally molded, and the package has the outer shape of the integral molded body The present invention relates to a belt-like cooling sheet that can be held.

  As another aspect of the present invention, the present invention is a method for manufacturing a belt-like cooling sheet in which a plurality of convex regenerators are connected via thin-walled portions, and a plurality of recesses are formed via partition walls. Injected into the freezing molded container is a cryogen having a gel-like shape by freezing to room temperature until it overflows from the recess, and then freezing the frozen molding container to freeze it. Of a cooling sheet having a cold storage part and a thin part made of a cold-retaining agent, and an integrally molded body obtained by integrally molding the cold storage part and the thin part Regarding the method.

  As another aspect of the present invention, the present invention is a method for manufacturing a belt-like cooling sheet in which a plurality of convex regenerators are connected via thin-walled portions, and a plurality of recesses are formed via partition walls. A cryogen having a gel-like form was injected into the recess of the freezing molded container by freezing to a room temperature, and the recess was covered with a flexible substrate, and the substrate was injected The frozen container is frozen while in contact with the cryogen, and the frozen cryogen and the base material combined with the cryogen are taken out from the cryomolding container, so that the cold storage part composed of the cryogen and the thin part composed of the substrate It is related with the manufacturing method of the strip | belt-shaped cooling sheet | seat characterized by the above-mentioned, and obtaining the integrally molded body which shape | molded this cold storage part and this thin part integrally.

  Moreover, as another aspect of the present invention, the present invention provides a method for producing a belt-like cooling sheet comprising a plurality of convex cold accumulators arranged in series via thin-walled portions, and a package that houses the cold-storage portions and the thin-walled portions. Then, in the freezing molded container in which a plurality of recesses are formed through the partition wall, the cryogen having a gel-like form is poured by allowing it to be at room temperature after freezing until it overflows from the recesses, Thereafter, the freezing molded container is frozen, and the frozen cryogen is taken out of the freezing molded container, so that it has a cold storage part and a thin part made of a cryogen, and the cold storage part and the thin part are integrally molded. It is related with the manufacturing method of the strip | belt-shaped cooling sheet | seat characterized by obtaining a body and accommodating an integrally molded body in the package body which can hold | maintain the external shape of this integrally molded body after that.

  Moreover, as another aspect of the present invention, the present invention provides a method for producing a belt-like cooling sheet comprising a plurality of convex cold accumulators arranged in series via thin-walled portions, and a package that houses the cold-storage portions and the thin-walled portions. A cryogen having a gel-like form is injected into the concave portion of the freezing molded container in which a plurality of concave portions are formed through the partition wall, and then cooled to room temperature, thereby flexing the concave portion. The frozen molding container in a state where it is in contact with the cryogen injected with the base material, and the frozen cryogen and the substrate bonded to the cryogen are taken out from the freezing molding container. A cold storage part composed of a cold storage agent and a thin-walled part composed of a base material, and obtaining an integrally molded body obtained by integrally molding the cold storage part and the thin-walled part, and then forming the integral molded body into the outer shape of the integral molded body In a package that can be held Strip process for producing a cooling sheet.

  According to the present invention, the cooling storage part can be bent around the thin part by providing the cold storage part continuously through the thin part. Therefore, it is possible to provide a cooling sheet that can be used so as to easily come into contact with a cooling target having a curved surface.

  In addition, according to the present invention, it is possible to provide a manufacturing method capable of easily manufacturing a cooling sheet that can be used to contact a cooling target having a curved surface with the same effort as a conventional cooling pack. .

It is a perspective view of the cooling sheet of a 1st embodiment. It is sectional drawing of the cooling sheet of 1st Embodiment of the AA 'line in FIG. It is a perspective view of the molding container for freezing which can be used in order to manufacture the cooling sheet in 1st Embodiment. It is sectional drawing in the same position as the AA 'line of FIG. 1 of the cooling sheet of 2nd Embodiment. It is sectional drawing in the same position as the AA 'line of FIG. 1 of the cooling sheet | seat of 3rd Embodiment. It is sectional drawing in the same position as the AA 'line of FIG. 1 of the cooling sheet of 4th Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view of the cooling sheet 1 of the first embodiment, and FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG.

  The cooling sheet 1 of 1st Embodiment has a strip | belt-shaped external shape as shown in FIG. In addition, the cooling sheet 1 includes a cooling base 30 made of only a cooling agent and a support base 10 made of a flexible base that is joined to the cooling base 30. The cooling base 30 includes a plurality of cool storage units 2 arranged in a matrix, and a thin portion 3 coupled to the cool storage unit 2 at a lower portion of the cool storage unit 2. In other words, the plurality of cold storage units 2 are continuously provided via the thin portions 3. The support base 10 is joined to the cooling base 30 on the surface opposite to the surface from which the cold storage unit 2 protrudes. In addition, in description of 1st Embodiment and other embodiment, in order to understand easily, the surface by which the cool storage part 2 protrudes in the cooling sheet 1 is the surface of the cooling sheet 1, and mentions later. The surface on the side of the support base 10 that is the surface opposite to the front surface, which is used as the contact surface in the example of the usage method, is the back surface.

  Hereinafter, the configuration of the first embodiment will be specifically described. First, the cooling base | substrate 30 comprised by the cool storage part 2 and the thin part 3 is demonstrated. As shown in FIG. 2, the cool storage unit 2 included in the cooling base 30 has a convex outer shape in a side view, and is formed of a cooling agent. The cryogen that can be used is not particularly limited as long as it is a cryogen having a gel-like form at room temperature. For example, it can be set as the PVA aqueous solution which mix | blended 1-30 mass parts of polyvinyl alcohol (PVA) as a gelatinizer with respect to 100 mass parts of water. The cryogen, which is the PVA aqueous solution, is frozen and brought to room temperature and then cross-linked to have a gel-like form (known as a freeze-thaw method). Therefore, the outer shape of the cooling base 30 (the cold storage part 2 and the thin part 3) can be maintained even at room temperature. Moreover, a nucleating agent, a coloring agent, a preservative, etc. may be blended with the cold-retaining agent as necessary. These nucleating agents, preservatives, and coloring agents are appropriately selected and added by those skilled in the art, and the addition amount can be appropriately set based on a conventional method. In addition, in this specification, normal temperature means 20-30 degreeC.

  In the cooling base body 30 according to the first embodiment, the thin wall portion 3 is coupled to the lower portion of the cold storage portion 2, and the cold storage portion 2 is continuously arranged via the thin wall portion 3. As an example, in the first embodiment, a plurality of cold storage units 2 are arranged in a matrix with thin portions 3 interposed therebetween. Further, in the first embodiment, the thin-walled portion 3 is composed of a cold insulating agent as with the cold storage portion 2. That is, in 1st Embodiment, the cool storage part 2 and the thin part 3 are integrally shape | molded with the cold insulating agent which has a gel-like form at normal temperature. In addition, in order to make an understanding of the boundary of the cool storage part 2 and the thin part 3 easy, in FIG. 2, the boundary is represented using the broken line.

  In the first embodiment, the thickness of the thin portion 3 (the length of the broken line in FIG. 2) is not particularly limited, but is preferably 1 mm or less, and more preferably 0.5 mm or less. By setting it to 1 mm or less, the cold insulation agent in the thin-walled portion 3 is melted faster than the cold insulation agent in the cold storage portion 2 due to heat transmitted from the object to be cooled or the like, compared to the case where the thickness is thicker than 1 mm. Therefore, the cooling sheet 1 can be easily deformed by bending the cooling sheet 1 around the thin portion 3 softened by melting. In addition, by setting the thickness to 0.5 mm, even if the cold-retaining agent in the thin-walled portion 3 is frozen, the thin-walled portion 3 can be broken by a normal human force and the continuous arrangement of the cold-storage unit 2 can be released. The cooling sheet 1 can be deformed in a shorter time.

  In addition, it does not specifically limit about the lower limit of the thickness of the thin part 3, A person skilled in the art can set suitably. For example, it can be 0.01 mm or more.

  In the first embodiment, the above-described cooling base 30 is a support base made of a flexible base material on the back surface side opposite to the front surface side of the cooling sheet 1 from which the cold storage unit 2 protrudes. 10, and the cooling base 30 (the cold storage portion 2 and the thin portion 3) is joined to the support base 10 (that is, the cooling base 30 and the support base 10 join the flexible base material). Equivalent to an integrally molded body having a configuration of Thereby, even when the thin-walled portion 3 is broken, since the cold storage unit 2 is coupled to the support base 10, the cold storage unit 2 can be prevented from being scattered and separated. The support base 10 can be used as long as it is made of a material that does not harden at a normal freezer temperature (−15 to −25 ° C.). For example, polyethylene, polypropylene, polyurethane, polystyrene, polyamide, polyester, polyvinyl chloride or a copolymer thereof, polyvinylidene chloride or a copolymer thereof, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, polyethylene terephthalate Examples thereof include fabrics and films composed of polycarbonate, nylon, cellulose acetate, acrylonitrile sheet, natural or synthetic rubber, and the like. Moreover, you may make it comprise the film and cloth which consist of these materials.

  Next, a method of using the cooling sheet 1 of the first embodiment will be described by taking as an example a case where the sheet is brought into contact with skin or a plastic bottle. When the cooling sheet 1 of the first embodiment is used, the cooling base 30 is frozen by being placed in a freezer previously set to about −25 to −15 ° C. for a predetermined time, for example, about 3 to 12 hours. After that, it is taken out from the freezer, and the back surface (that is, the surface opposite to the surface on which the support base 10 abuts on the cooling base 30) that is the surface opposite to the surface from which the cold storage unit 2 protrudes is used as a contact surface. Make contact. At this time, due to heat conducted from the skin or the like, the cold insulation agent in the thin wall portion 3 softens faster than the cold insulation agent in the cold storage portion 2. Therefore, the cooling sheet 1 can be bent along the curved surface of the surface of the skin or the like with the thin portion 3 as the center.

  Moreover, when the user desires to perform the deformation of the cooling sheet 1 in a shorter time, the thin portion 3 may be broken. At this time, since each of the cold storage units 2 is coupled to the support base 10, even if the thin wall portion 3 is broken, the cold storage units 2 are prevented from being scattered and separated. Therefore, when the thin portion 3 is broken, the cooling sheet 1 can be bent along the curved surface of the surface of the skin or the like with the portion located below the thin portion 3 in the support base 10 as the center. Therefore, the cooling sheet 1 can be brought into contact with the curved surface to be cooled earlier than waiting for the cold-retaining agent in the thin portion 3 to soften.

  Then, an example of the manufacturing method of the cooling sheet 1 of 1st Embodiment is demonstrated. The cooling sheet 1 of 1st Embodiment can be manufactured using the shaping | molding container 20 for freezing provided with a shape as shown, for example in FIG.

  As shown in FIG. 3, the freezing molded container 20 has a shape in which a plurality of recesses 21 are connected via a partition wall 22. A person skilled in the art can appropriately set the width of the apex portion of the partition wall 22. In addition, an outer peripheral frame 23 is formed along the outer periphery of the freezing molded container 20 so as not to leak from the freezing molded container 20 when a sol-like PVA aqueous solution is poured. Furthermore, the upper side of the freezing molded container 20 is open. The height of the outer peripheral frame 23 can be set as appropriate by those skilled in the art, but can be the same as the thickness of the thin portion 3 to be formed, for example.

  In manufacturing the cooling sheet 1, first, a PVA aqueous solution (cooling agent) to which 1 to 30 parts by mass of polyvinyl alcohol is added to 100 parts by mass of water is poured into the freezing container 20. A nucleating agent, a coloring agent, a preservative, and the like may be added to the PVA aqueous solution. At this time, in the first embodiment, an amount of PVA aqueous solution overflowing from the recess is injected. For example, the PVA aqueous solution is injected to substantially the same height as the outer peripheral frame 23.

  Next, the support base 10 made of a flexible base material is brought into contact with a PVA aqueous solution to be formed later as the cooling base 30 on the freezing molded container 20. The size of the support base 10 is not particularly limited and can be set as appropriate. For example, the support base 10 can be set to have an area larger than the area surrounded by the outer peripheral frame 23.

  Subsequently, in a state in which the contact between the support base 10 and the PVA aqueous solution that will later become the cooling base 10 is maintained, the freezing molded container 20 is placed in a freezer and frozen. As a result, the PVA aqueous solution that is a cooling agent is frozen to form the cold storage part 2, the cold storage part 2 is connected via the thin wall part 3 formed therebetween, and the cooling base 30 and the support base 10 are provided. And join. At this time, the length of the thin wall portion 3 to be formed (that is, the interval at which the cold storage portion 2 is continuously provided) corresponds to the width of the apex portion of the partition wall 22.

  Then, by taking out the frozen PVA aqueous solution from the freezing molded container 20, a cooling base 30 (cold storage part 2 and thin part 3) made of a cooling agent and joined to the support base 10 is obtained, and the belt-like cooling sheet 1 is obtained. To do. Here, in the first embodiment, the cold storage part 2 and the thin part 3 formed by freezing proceed with a crosslinking reaction when melted, so that the outer shape is maintained in a gel state even at room temperature.

  In the first embodiment, the size (dimension) of the cooling sheet 1 can be appropriately set by those skilled in the art. For example, in a plan view, a rectangular shape having a longitudinal direction of about 25 cm and a width direction of about 10 cm can be made suitable for icing by being wound around an elbow or the like, although there are individual differences.

  Thus, according to 1st Embodiment, the cooling sheet | seat 1 which can be deform | transformed according to the curved surface which cooling object has can be manufactured with the same effort as manufacturing the conventional cooling pack.

(Second Embodiment)
In 1st Embodiment, the case where the cooling base | substrate 30 was comprised only with the cold storage agent, ie, the case where the thin part 3 was comprised with the same material as the cool storage part 2, was demonstrated. In 2nd Embodiment, the cooling base | substrate 30 is comprised by arrange | positioning the cool storage block 4 which consists of a cold insulating agent in matrix form on the cloth body 12 provided with flexibility at predetermined intervals. Therefore, in 2nd Embodiment, the thin part 3 is comprised with the material different from the cool storage part 2. FIG. Hereinafter, although the cooling sheet 1 of 2nd Embodiment is demonstrated, about the structure which is common in 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 4 is a cross-sectional view of the cooling sheet according to the second embodiment at the same position as the line AA ′ of FIG. 1. As shown in FIG. 4, also in the second embodiment, as in the first embodiment, a plurality of cold storage blocks 4 (corresponding to a cold storage unit) made of a cold insulating agent are connected via a thin portion 3. . Moreover, in 2nd Embodiment, as shown in FIG. 4, the cool storage block 4 is arrange | positioned on the cloth body 12 with the predetermined space | interval, and the part corresponded to the thin part 3 is comprised only by the cloth body 12. As shown in FIG. Has been. Therefore, in 2nd Example form, the cooling base | substrate 30 is comprised by the cool storage block 4 which consists of a cold insulating agent, and the thin part 3 which consists of the cloth body 12. FIG.

  In manufacturing the cooling sheet 1 of the second embodiment, first, as in the first embodiment, 100 parts by mass of water is placed in a freezing molded container 20 in which a plurality of recesses 21 are connected via a partition wall 22. A PVA aqueous solution containing 1 to 30 parts by mass of polyvinyl alcohol (including a nucleating agent, a coloring agent, a preservative, etc., if necessary) is injected. At this time, in the second embodiment, a PVA aqueous solution (an amount of PVA aqueous solution that can be accommodated in the concave portion) is injected into the concave portion 21 of the freezing molded container 20. A person skilled in the art can appropriately set the injection amount of the aqueous PVA solution as long as it can be accommodated in the recess (an amount not exceeding the height of the partition wall 22). A certain amount of PVA aqueous solution can be injected.

  Next, the cloth body 12 is disposed so as to cover the recess 21. In addition, the dimension of the cloth body 12 that can be used for manufacturing the cooling sheet 1 is not particularly limited and can be set as appropriate. For example, the area can be smaller than the area surrounded by the outer peripheral frame 23.

  Subsequently, in a state where the aqueous PVA solution injected into the recess 21 is in contact with the cloth body 12 covering the recess 21, the freezing molded container 20 is placed in a freezer and frozen. At this time, in 2nd Embodiment, when the PVA aqueous solution is inject | poured to the height substantially the same as the partition wall 22, the state which the PVA aqueous solution and the cloth body 12 contact | maintains can be maintained easily. In the second embodiment, the PVA aqueous solution is frozen while being in contact with the cloth body 12 as described above, thereby forming the cold storage block 4 and combining the cold storage block 4 and the cloth body 12. That is, in this process, it is possible to form the cold storage block 4 made of a cold-retaining agent that is continuously provided by the thin portion 3 made of the cloth body 12.

  And in 2nd Embodiment, the formed cold storage block 4 and the cloth body 12 couple | bonded with this cold storage block 4 are taken out from the shaping | molding container 20 for freezing, and the cooling base | substrate 30 (The cold storage part 2 and cloth body which consist of a cold insulating agent). The thin-walled portion 3) consisting of 12 is obtained as the cooling sheet 1.

  In addition, as a fiber which comprises the cloth body 12, as long as the cloth body 12 has flexibility, it is not specifically limited, For example, it can be set as cotton, polyester, nylon, rayon, and as long as it has flexibility, Those skilled in the art can also set the thickness of the non-woven body 12 as appropriate. Furthermore, any base material having flexibility may be used, and the material is not limited to a cloth body. For example, a film or the like may be used.

(Third embodiment)
The third embodiment includes a cooling base 30 composed of the cold storage part 2 and the thin-walled part 3 and a package 14 that accommodates the cooling base 30. Hereinafter, although the cooling sheet 1 of 3rd Embodiment is demonstrated, about the structure which is common in 1st and 2nd embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 5 is a cross-sectional view of the cooling sheet of the third embodiment at the same position as the line AA ′ of FIG. 1. In addition, since the external shape of the cooling sheet 1 and the cooling base body 30 is the same as that of the first embodiment, the description thereof is omitted. As shown in FIG. 5, the cooling sheet 1 according to the third embodiment seals a cooling base 30 made of only a cooling agent in a package 14. The packaging body 14 is formed in a shape that matches the outer shape of the cooling base body 30 (that is, the cold storage section 2 and the thin-walled section 3), and the packaging body 14 can maintain the shape of the internal cooling base body 30. It is.

  Also in 3rd Embodiment, the cooling base | substrate 30 (The cool storage part 2 and the thin part 3) is formed with the cold insulating agent similarly to 1st Embodiment. On the other hand, in 3rd Embodiment, the cryogen which can be used is not specifically limited, 1-30 mass parts of PVA was mix | blended with respect to 100 mass parts of water demonstrated in 1st Embodiment. In addition to the PVA aqueous solution, it may be a refrigeration agent having a sol-like form when the room temperature is set after freezing. For example, a gelling agent selected from natural polysaccharides such as carboxymethylcellulose, sodium polyacrylate, guar gum, xanthan gum, locust bean gum, starch, gelatin, and glucomannan sugar foods is added to water. Can do. The addition amount of these gelling agents can be about 1-5 mass parts with respect to 100 mass parts of water according to a conventional method, for example. Further, as in the first embodiment, nucleating agents, preservatives, coloring agents and the like can also be added, and the addition amount can be appropriately set by those skilled in the art based on conventional methods.

  Although the thickness of the thin portion 3 is not particularly limited in the third embodiment, it can be 1 mm or less, more preferably 0.5 mm or less, as in the first embodiment. Further, the lower limit value of the thickness of the thin portion 3 is not particularly limited as in the first embodiment, and can be set as appropriate by those skilled in the art, for example, 0.01 mm or more.

  In 3rd Embodiment, the cooling base | substrate 30 which consists of the cool storage part 2 and the thin part 3 demonstrated above is sealed and accommodated in the package body 14. As shown in FIG. The material of the package 14 can be used as long as it is a polymer material that is not cured at a normal freezer temperature (−15 to −25 ° C.) and is used as a package material having airtightness. For example, polyethylene, polypropylene, polyurethane, polystyrene, polyamide, polyester, polyvinyl chloride or a copolymer thereof, polyvinylidene chloride or a copolymer thereof, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, polyethylene terephthalate And polycarbonate, nylon, cellulose acetate, acrylonitrile sheet, natural or synthetic rubber, and the like. Moreover, you may make it the package 14 be comprised as a laminated body of two or more layers according to the objective.

  Here, in the third embodiment, the package 14 is formed in a shape that matches the outer shape of the cooling base 30. As a result, even when a refrigeration agent having a sol form at normal temperature is used as the material of the cooling base 30, the packaging body 14 can retain the outer shape of the internal cooling base 30, so that it can be put in the freezer again. By freezing, the internal cooling base 30 can be made to have substantially the same outer shape as that before use.

  Then, an example of the manufacturing method of the cooling sheet 1 of 3rd Embodiment is demonstrated. Similarly to the first and second embodiments, the cooling sheet 1 of the third embodiment can also be manufactured using a freezing molded container 20 having a shape as shown in FIG.

  In manufacturing the cooling sheet 1, first, a sol-like cooling agent is poured into the freezing molding container 20, and the freezing molding container 20 is frozen in a freezer, so that the cooling substrate 30 inside the cooling sheet 1 is formed. Let it form. At this time, also in the third embodiment, as in the first embodiment, an amount of the cryogen overflowing from the concave portion is injected into the freezing molded container. In other words, the cooling agent is injected beyond the partition wall 22 until, for example, the height of the outer peripheral frame 23 is substantially the same.

  Next, the formed cooling base 30 is taken out from the freezing forming container 20 and accommodated in the package 14 made of the package material as exemplified above. In the third embodiment, the package 14 is formed in advance in a shape that matches the outer shape of the cooling base 30. And the cooling sheet | seat 1 is manufactured by sealing the inside of the package body 14 by fusion | fusion, for example.

(Fourth embodiment)
As a third embodiment, a case has been described in which the cooling base 30 is formed of only a cold-retaining agent as in the first embodiment and is accommodated in the package 14. In 4th Embodiment, it replaces with the cooling base | substrate 30 comprised only from a cold insulating agent, and as shown in FIG. 6, the cool storage block 4 which consists of a cold insulating agent arrange | positioned at predetermined intervals like 2nd Embodiment. And the cooling base | substrate 30 provided with the thin part 3 which consists of the fabric body 12 is accommodated in the package 14 which can hold | maintain the external shape of the said cooling base | substrate 30. FIG. In this case as well, as in the third embodiment, the cryogen may have a sol form when placed at room temperature. Further, the package 14 that can be used for manufacturing is shaped in advance so as to match the outer diameter shape of the formed cooling substrate 30 and can maintain the shape of the internal cooling substrate. Can be used.

  The cooling sheet 1 and the manufacturing method thereof according to the first to fourth embodiments have been described above. According to the cooling sheet 1 of the first to fourth embodiments, the cooling sheet 1 is formed under the thin portion 3 (if the thin portion 3 is broken, the support base 10 or the cloth body 12 is below the thin portion 3. The cooling sheet 1 can be deformed by bending it around the portion located on the side. Therefore, the cooling sheet 1 of these embodiments can be used such that the back surface of the cooling sheet 1 is brought into contact with the curved surface to be cooled such as skin.

  In addition, according to the manufacturing methods described in the first to fourth embodiments, the cooling sheet 1 that can be used to abut along the curved surface to be cooled can be connected to the cooling sheet 1 through a plurality of recesses. It can manufacture by freezing a cryogen in a freezer etc. using the forming container 20 for freezing to install. Therefore, the process of forming the fixing means of the cooling pack to the towel, which is necessary in addition to the manufacturing of the cooling pack with the conventional cooling towel that can be brought into contact with the curve of the cooling target, is omitted. The cooling sheet 1 having the above actions can be manufactured. In other words, the cooling sheet 1 of the first to fourth embodiments can be manufactured with the same effort as the conventional cooling pack.

(Other embodiments)
As mentioned above, although the cooling sheet 1 of the 1st-4th embodiment was demonstrated, this invention is not limited to this, It can also be set as another structure.

  For example, in the first embodiment, by providing the support base 10, it is possible to prevent the cold storage units 2 from being scattered and separated even if the thin portion 3 is broken. On the other hand, even when the supporting base 10 is not provided, the cooling sheet 1 can be configured, and in this case, for example, the cooling sheet 1 can be deformed by softening the thin-walled portion 3 by external conduction heat or the like. Those skilled in the art can naturally understand.

  Also in the first embodiment, the cooling base 30 and the support base 10 may be accommodated in the package as in the third embodiment. Further, the non-bonding surface of the cooling base 30 with the support base 10 can be covered with a film made of, for example, a polymer material.

  Moreover, in 3rd Embodiment, after forming the cooling base | substrate 30 using the shaping | molding container 20 for freezing, the example accommodated in the package 14 and manufactured was shown. However, the manufacturing method is not limited to this, and those skilled in the art can fully understand that the manufacturing method can be performed by other methods.

  For example, the cooling base material 30 is formed by injecting a cryogen into the package 14 formed so as to define the shape of the internal cooling base 30 and sealing it, and then freezing the cryogen in the freezer. It may be. Further, for example, after injecting and sealing a cryogen into the package 14 whose outer shape is a rectangular parallelepiped, the cryogen is frozen while pressing one side of the cryocontainer 20 as shown in FIG. Thus, the cooling base 30 may be formed. Further, the cooling base 30 formed by the freezing molded container 20 is accommodated in a rectangular packaging body, the inside is vacuumed and the packaging body is brought into close contact with the cooling base 30, and then the inside is sealed by fusion. Can also be manufactured.

  Moreover, in 3rd Embodiment, although the shape of the package 14 is made to correspond with the external shape of the internal cooling base | substrate 30, it is not limited to this as long as the external shape of the internal cooling base | substrate 30 can be hold | maintained. . For example, the outer shape of the cooling base body 30 can be maintained by forming the package 14 with two layers of film, and making the shape that matches the outer shape of the cooling base body 30 only with respect to the film constituting the inner layer. You may make it.

  Furthermore, in embodiment described above, the cool storage part 2 is couple | bonded with the thin part 3 in the lower part. However, it is not limited to this, The coupling | bonding position with respect to the cool storage part 2 of the thin part 3 can also be made into another position. On the other hand, as in the first and third embodiments, the thin-walled portion 3 is coupled to the thin-walled portion 3 at the lower portion of the cold-storage portion 2 (provided at a position where the back surface of the thin-walled portion 3 is substantially horizontal with the back surface of the cold-storage portion 2) It is preferable to configure 3 to be made of a cold insulator because the area that can be cooled with respect to the object to be cooled can be increased.

  Furthermore, as described above, the cooling sheet 1 of the above-described embodiment cools (or suppresses an increase in temperature) by bringing it into contact with not only human skin and plastic bottles but also other items having curved surfaces such as food. Can be used for However, the method of use is not limited to this, and it can be fully understood by those skilled in the art that the same use as a conventional cooling pack is possible. At this time, the cooling sheet 1 in the embodiment described above can be deformed by bending the thin portion 3 or the like as a center. Therefore, it can put in the space of various shapes rather than the conventionally known cooling pack. In other words, it is more versatile than conventional cooling packs.

  In addition, in the above embodiment, the cooling sheet 1 that has been cooled is deformed, and the case where the deformed cooling sheet 1 is used immediately is described as an example. It is not limited to this. For example, it can be used after being placed in a freezer while maintaining the deformed shape and frozen again in that state.

DESCRIPTION OF SYMBOLS 1 Cooling sheet 2 Cold storage part 3 Thin part 4 Cold storage block 10 Support base body 12 Cloth body 14 Packaging body 20 Molding container 21 for freezing Recess 22 Partition wall 23 Peripheral frame 30 Cooling base body

Claims (2)

A plurality of convex cold storage units arranged continuously through the thin-walled portion;
A substrate having flexibility,
The cold storage part and the thin-walled part are an integrally molded body that is integrally molded with a cold-retaining agent having a gel-like form at room temperature,
The integrally molded body has a configuration in which the base material is joined by contacting the base material with the cold storage portion and the thin portion on the surface opposite to the surface on which the cold storage portion projects. And
Wherein by bending around the thin portion or the thin portion zonal cooling sheet is deformable by breaking. A method for producing the belt-shaped cooling sheet according to claim 1,
In a freezing molded container in which a plurality of recesses are formed through a partition wall, a cryogen having a gel-like form is injected by allowing it to be at room temperature after freezing until it overflows from the recesses,
Then, freeze the molded container for freezing,
Removing a frozen cryogen from the freezing molded container, and including the cold storage part and the thin part made of the cryogen, and obtaining an integrally molded body obtained by integrally molding the cold storage part and the thin part. ,
The freezing molded containers, a substrate having flexibility in abutting contact with the cold agent comprising said cold storage unit and the thin portion in the surface opposite to the front Symbol recess recessed side surface it frozen cold, in the integrally molded body, on the surface opposite to the side on which the cold accumulation unit projects, producing bands like cooling sheet shall be the structure that joins the base material having flexibility Method.

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