JP2023003360A - Coldness/warmth keeper and method for producing the same and coldness/warmth keeping garment - Google Patents

Abstract

To provide a coldness/warmth keeper that can exhibit substantially uniformly a cooling effect or a warmth-keeping effect even after a lapse of time.SOLUTION: A coldness/warmth keeper 1 has: a coldness/warmth keeping material 10; and a covering member 20 having a back side-cover 22 to cover the side of the coldness/warmth keeping material 10 at which a coldness/warmth keeping object T is to be disposed, and a front side-cover 21 to cover the opposite side of the coldness/warmth keeping material 10 to the back side-cover 22 side. The front side-cover 21 and the back side-cover 22 each have: a thermal barrier 120; a one-side heat-conductive layer 110a disposed at one side of the thermal barrier 120 in the thickness direction; and an other-side heat-conductive layer 110b disposed at the other side of the thermal barrier 120 in the thickness direction. Providing the heat-conductive layers 110a, 110b on both sides of the thermal barrier 120 allows the coldness and warmth of the coldness/warmth keeping material 10 to transmit well inside the covering member 20 in the plane direction, so that a cold or warm state can be kept for a long time in a broad range of the coldness/warmth keeping material 10.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a cold insulator and a method of manufacturing the same. The present invention also relates to a cold-insulating/heat-retaining garment provided with this cold-insulating/heat-retaining tool.

In recent years, against the backdrop of global warming, products for cooling the body have been proposed one after another. Among them, cold-insulating clothes to which a cold insulator can be attached are attracting attention for their high effect because they can directly cool the body. Examples of such cold-insulating clothes include the work clothes 1 described in FIG. 2 of Patent Document 1, and the like. The working clothes 1 are equipped with pockets 2 at a plurality of locations on the inner surface thereof, and by putting a frozen cold insulating bag B (cooling device) in the pockets 2 and wearing it, it is possible to take measures against heat. It is said that

Conventionally, as a cold insulator to be put in the pocket 2, a gel bag filled with a gel-like cold insulator has been widely used. However, when such a general cold insulator is used, there is a problem that the frozen cold insulator quickly melts, and the cooling effect of the cold insulator does not last long.

In this respect, FIG. 2 of Patent Document 2 describes a cold storage device in which a cold storage material 3 is accommodated in a bag 1 having a sheet material 4a made of a foam material and a waterproof layer 4b. In this cold storage device, it is said that the cooling effect lasts longer than the conventional cold insulating material due to the heat insulating effect of the sheet material 4a.

Utility Model Registration No. 3225280 Japanese Patent Application Laid-Open No. 09-059607

However, when the cold storage device described in Patent Document 2 is frozen and used for cold storage, there is a problem that the range in which the cooling effect can be obtained becomes narrower with the passage of time. This is because, as the cold storage material 3 melts, the remaining unmelted solid portion (the portion exhibiting the cooling effect) becomes localized. A similar problem may arise with a heat retaining tool used for heat retention.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a cold-retaining and heat-retaining tool that can obtain a substantially uniform cooling effect or heat-retaining effect over time. It is also an object of the present invention to provide a method for manufacturing this cold insulating and heat insulating device and a cold insulating and heat insulating garment equipped with this cold insulating and heat insulating device.

The above issues are
a cold insulation material;
A cold insulating and heat insulating material comprising a covering member having a back side covering part covering a side of a cold insulating and heat insulating material on which a cold insulating and heat insulating object is arranged, and a front side covering part covering a side opposite to the back side covering part of the cold insulating and heat insulating material. is a tool,
The front side covering part and the back side covering part are
an insulating layer;
a one-side heat-conducting layer arranged on one side in the thickness direction of the heat-insulating layer;
The problem is solved by providing a cold insulation/warming tool characterized by comprising a heat conductive layer on the other side in the thickness direction of the heat insulating layer.

In this cold insulator/heat insulator, the cold insulator/heat insulator is covered with a covering member having a heat insulating layer. This makes it possible to prolong the cold insulating and heat insulating effect of the cold insulating and heat insulating material. In addition, one side heat conductive layer and the other side heat conductive layer are provided on one side and the other side in the thickness direction of the heat insulating layer, respectively. As a result, even if the cold insulation and heat insulation material partially loses its coldness (warmth) over time, the cold heat (heat) of the part that exhibits the cooling action (warming action) can be Through the side heat conductive layer, it becomes possible to transmit the heat to the entire cold insulating/warming tool. Therefore, it becomes easier to maintain a cold (warm) state over a wide area on the surface of the cold insulator/heat insulator. In addition, heat applied to the cold insulator/warmer from the outside, such as an object to be cold/warmed or outside air, can be dispersed throughout the cold insulator/warmer via the heat conductive layer on one side or the heat conductive layer on the other side. Therefore, it is possible to prevent the coldness (warmth) from being partially lost in the cold insulation/heat insulation (the coldness (warmth) is gradually lost in the entirety of the cold insulation/heat insulation). Therefore, it is possible to stably keep the object of cold insulation and heat retention for a long time.

In the cold insulating and heat retaining device according to the present invention, the front side covering portion has a structure in which a plurality of sets of covering lamination units each including one side heat conductive layer, a heat insulating layer, and the other side heat conductive layer are stacked. preferable. As a result, the heat insulating power of the front-side covering portion can be enhanced, and the cold insulating and heat insulating power can be concentrated on the back side where the cold insulating and heat insulating object is arranged, and the cold insulating and heat insulating effect can be more easily maintained. More preferably, the front-side covering portion has a structure in which three or more sets of covering lamination units are overlapped. On the other hand, it is preferable that the back side covering portion has only one set of lamination units for covering. As a result, the back side covering portion also has an appropriate heat insulating power, so that the object to be cold-insulated and heat-retained can be prevented from being excessively cold-insulated and heat-retained.

In this case, it is preferable that at least one set of the plurality of sets of covering lamination units provided in the front side covering portion and one set of covering lamination units provided in the back side covering portion are provided continuously with each other. This prevents cold air or warm air from escaping between the front-side covering portion and the back-side covering portion, making it easier to maintain the cold insulation and heat insulation effect.

In the cold-insulating/heat-retaining device according to the present invention, the covering member may be formed by folding a covering laminated sheet having a heat-conducting layer on one side, a heat-insulating layer, and a heat-conducting layer on the other side. preferable. This simplifies the manufacturing process of the cold insulator/heat insulator. Also, the number of parts of the covering member can be reduced. Therefore, the manufacturing cost can also be suppressed.

In the cold insulating and heat retaining device according to the present invention, it is preferable that the heat insulating layer includes a foamed resin layer. As a result, not only a heat insulating effect but also a cushioning effect can be obtained, and the cold insulation and heat retention equipment can be softened against the skin. Moreover, in the cold insulating and heat retaining device according to the present invention, it is preferable that the one side heat conductive layer and the other side heat conductive layer include a metal layer. As a result, heat conduction by the one-side heat-conducting layer and the other-side heat-conducting layer can be made more efficient.

It is preferable that the cold insulating and heat retaining tool according to the present invention further includes a packaging sheet that covers the outer side of the covering member. This makes it possible to make the covering member less likely to be damaged. In addition, it is also possible to prevent the one-side heat-conducting layer or the other-side heat-conducting layer from directly contacting the cold-insulating and heat-retaining object, so that the cold-insulating and heat-retaining object can be cold-insulated and heat-retained more mildly. Furthermore, for example, by applying a print or the like to the packaging sheet, it is possible to enhance the aesthetic appearance of the cold insulator.

A high cooling effect on the body is expected from the cold insulating and heat insulating clothing provided with the cold insulating and heat insulating device according to the present invention. However, the cold insulator according to the present invention is not limited to clothes, and can be used for any purpose for cold insulating and heat insulating objects.

INDUSTRIAL APPLICABILITY As described above, the present invention makes it possible to provide a cold-insulating and heat-retaining tool that can obtain a substantially uniform cooling effect or heat-retaining effect over time. In addition, it becomes possible to provide a method for manufacturing this cold insulating/heat insulating tool and a cold insulating/heat insulating garment equipped with this cold insulating/heat insulating tool.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall view of the cold insulating and heat retaining tool of the first embodiment; Fig. 2 is a cross-sectional view showing the cold insulating and heat retaining device of the first embodiment cut along the SS plane in Fig. 1; It is a figure for demonstrating the manufacturing method of the cold-insulating/heat-retaining tool of 1st embodiment. Fig. 3 is a cross-sectional view showing the cold insulating and heat retaining device of the second embodiment cut along the same plane as in Fig. 2; FIG. 10 is a diagram for explaining the configuration and manufacturing method of the cold insulating and heat retaining device of the third embodiment. FIG. 10 is a diagram for explaining the configuration and manufacturing method of the cold insulator and heat insulator of the fourth embodiment. FIG. 10 is a cross-sectional view showing a cold insulating/warming tool of a comparative example cut along a plane substantially parallel to the thickness direction. It is a graph which shows the result of an evaluation experiment.

1. First Embodiment A preferred embodiment of the present invention will be described more specifically with reference to the drawings. FIG. 1 is an overall view of a cold insulator/heat insulator 1 of the first embodiment. 1(a) is a view of the cold insulator/heat insulator 1 viewed from the front surface 1a side, and FIG. 1(b) is a view of the cold insulator/heat insulator 1 viewed from the back surface 1b side. FIG. 2 is a cross-sectional view showing the cold insulating and heat retaining device 1 of the first embodiment cut along the SS plane in FIG.

The cold insulator 1 of the first embodiment has a front surface 1a and a back surface 1b, as shown in FIG. At the time of use, as shown in FIG. It is arranged near the object T for cold insulation and heat insulation so as to face the side. As a result, the object T to be cold-insulated/heat-retained can be stably kept cold/heat-retained for a long time. The reason for this will be described in detail below together with the configuration of the cold insulator 1 .

The cold insulator 1 of the first embodiment includes a cold insulator 10, a covering member 20, and a packaging sheet 30, as shown in FIG. The cold insulator/heat insulator 10 includes a gel-like cold insulator/heat insulator 11 and a flexible resin bag 12 that wraps the cold insulator/heat insulator 11. - 特許庁The covering member 20 is a member for covering the cold insulating and heat insulating material 10, and includes a front side covering portion 21 that covers the front side of the cold insulating and heat insulating material 10 (the side arranged on the front surface 1a side of the cold insulating and heat insulating device 1), and a cold insulating and heat insulating material. A back side covering portion 22 is provided to cover the back side of the heat insulating material 10 (the side arranged on the back surface 1b side of the cold insulating and heat insulating device 1). The packaging sheet 30 is a member for covering the outside of the covering member 20 .

The covering member 20 in the first embodiment is formed by folding one covering laminated sheet 100 . As shown in the enlarged portion of FIG. 2, the laminated covering sheet 100 has a structure in which a one-side heat-conducting layer 110a, a heat-insulating layer 120, and the other-side heat-conducting layer 110b are laminated and adhered in this order. have. The heat insulating layer 120 may have a one-layer structure, but in the first embodiment, it has a two-layer structure in which a heat insulating layer 120a on one side and a heat insulating layer 120b on the other side are laminated and adhered. Therefore, one covering laminate sheet 100 has a four-layer structure.

In this way, by covering the front side and the back side of the cold insulating and heat insulating material 10 with the covering laminated sheet 100 having the heat conductive layers 110a and 110b on both sides of the heat insulating layer 120, the coldness and warmth of the cold insulating and heat insulating material 10 can be transferred to the coating. It is possible to facilitate the transmission in the planar direction (the direction substantially perpendicular to the thickness direction of the heat insulating layer 120) inside the member 20. FIG. Therefore, even when the cold insulator 10 partially loses its coldness (warmth) over time, the surface of the cold insulator 1 can easily maintain a cold (warm) state over a wide area. A substantially uniform cooling effect or heat retaining effect can be obtained from the entire cold insulating and heat retaining device 1. - 特許庁In the first embodiment, no other member is interposed between the cold insulator 10 and the covering member 20, and the other heat conductive layer 110b is in direct contact with the surface of the cold insulator 10. Therefore, the above effect can be obtained more strongly.

The front-side covering part 21 may cover only a part of the front side of the cold insulation/heat insulating material 10, but in the first embodiment, it covers substantially the entire front side of the cold insulation/heat insulation material 10. . Similarly, the back side covering part 22 may cover only a part of the back side of the cold insulation/heat insulating material 10, but in the first embodiment, substantially the entire back side of the cold insulation/heat insulation material 10 is covered. I am assuming. Thereby, said effect can be heightened more.

The front-side covering portion 21 in the first embodiment is formed by stacking three laminated covering sheets 100 having a four-layer structure in the thickness direction. In other words, the front-side covering portion 21 has a structure in which three covering lamination units each including the one-side heat-conducting layer 110a, the heat-insulating layer 120, and the other-side heat-conducting layer 110b are stacked. Therefore, the front side covering portion 21 has a 12-layer structure. As a result, it is possible to prevent coldness and warmth from escaping to the front surface 1a where the cold insulation/heat insulation object T is not disposed, and the cold insulation/heat insulation effect of the cold insulation/heat insulation tool 1 can be extended. The three sets of covering lamination units constituting the front side covering portion 21 are described below in order from the side closest to the cold insulation and heat insulating material 10, respectively, the front side first lamination unit 21a, the front side second lamination unit It may be called a three-layer unit 21c.

On the other hand, the back side covering portion 22 in the first embodiment is formed by laying out only one laminated covering sheet 100 having a four-layer structure. In other words, the back side covering portion 22 has only one set of lamination units for covering. Therefore, the back side covering portion 22 is in a state of being composed of only four layers. As a result, the coldness and warmth of the cold insulating and heat insulating material 10 can be transmitted to the cold insulating and heat insulating object T with moderate strength. Hereinafter, one set of covering lamination units constituting the back side covering portion 22 may be referred to as a back side lamination unit 22a.

The number of covering lamination units constituting the front side covering portion 21 is not limited to three sets. However, if the number of covering lamination units is too small, it may become difficult to maintain the cold insulating and heat insulating effect of the cold insulating and heat insulating device 1 for a long time. For this reason, the number of covering lamination units constituting the front-side covering portion 21 is preferably two sets or more, and more preferably three sets or more. On the other hand, if the number of lamination units for covering is too large, the cold insulator 1 may become thick and bulky. Therefore, the number of covering lamination units constituting the front-side covering portion 21 is preferably 6 sets or less, more preferably 5 sets or less, and even more preferably 4 sets or less.

The number of covering laminate units (the number of covering laminate sheets 100 ) constituting the back side covering portion 22 is usually smaller than that of the front side covering portion 21 . Although the number of covering lamination units constituting the back side covering portion 22 may be two or more sets, one set is preferable as adopted in the first embodiment.

FIG. 3 is a diagram for explaining the manufacturing method of the cold insulator 1 of the first embodiment. The cold insulator 1 of the first embodiment includes a covering step of covering the cold insulator 10 with the covering member 20, and the outside of the cold insulator 10 and the covering member 20 after the covering step is covered with the packaging sheet 30 (Fig. 2). It can be manufactured through a covering and packaging process. Among these steps, in the covering step, as shown in FIG. 3( a ), the cold insulating and heat insulating material 10 is covered using one covering laminated sheet 100 formed in a strip shape. Hereinafter, for convenience of explanation, each portion obtained by dividing the covering laminate sheet 100 into approximately four equal parts in the longitudinal direction is called a first portion 100a, a second portion 100b, a third portion 100c, and a fourth portion 100d in order from one side in the longitudinal direction. I may call

The covering step in the first embodiment includes, as shown in FIG. 3(a), a first folding step of folding the _first portion 100a along the folding line L1 to overlap the second portion 100b, and FIG. 3(b). , the first portion 100a and the second portion 100b, which have been overlapped through the first folding step, are adhered at both ends in the width direction of the covering laminate sheet 100 to form the bag portion 23. a forming step, a cold insulating heat insulating material inserting step of inserting the cold insulating heat insulating material 10 into the bag portion 23 formed in the bag portion forming step, as shown in FIG. , a _second folding step of folding the fourth portion 100d with the line L2 as the folding line and overlapping the third portion 100c, and as shown in FIG. and a _third folding step of folding the fourth portion 100d along the folding line L3 to overlap the bag portion 23 (first portion 100a). As a result, as shown in FIG. 2, a front-side covering portion 21 having three laminated covering sheets 100 and a back-side covering portion 22 having only one laminated covering sheet 100 can be formed. The bonding method in the bag portion forming step is not particularly limited, and heat welding, bonding using an adhesive agent, bonding using a tape or the like, or the like can be employed.

In the cold insulator/heat insulator 1 manufactured in this way, as shown in FIG. 2, the front side first lamination unit 21a and the back side lamination unit 22a are continuous with each other. The front side third lamination unit 21c and the back side lamination unit 22a are also continuous with each other. As a result, the coldness and warmth of the cold insulating and heat insulating material 10 can be more easily transmitted in the surface direction within the covering member 20 . In addition, the insulation effect of the covering member 20 can be enhanced to prolong the cold insulation/heat insulation effect of the cold insulation/heat insulation device 1 .

The covering member 20 may be formed by combining a plurality of laminated covering sheets 100 separated from each other. However, in this case, for example, there is a risk that a mistake such as losing a part of the plurality of laminated covering sheets 100 may easily occur. In this respect, as described above, if the covering member 20 is formed from a single laminated covering sheet 100, errors in manufacturing the cold insulator 1 can be reduced. In addition, since the number of laminated covering sheets 100 to be prepared can be reduced, the manufacturing process can be simplified.

The one-side heat-conducting layer 110a included in the covering laminated sheet 100 (covering laminated unit) is not particularly limited in its specific form as long as it can exhibit a heat-conducting effect. The one-side heat conductive layer 110a can be made of metal, for example. Examples of such metals include aluminum, copper, tin, lead, and alloys containing these. Such a metal may be formed into a layer by being held on a carrier such as a film, formed into a foil, or directly vapor-deposited on the heat insulating layer 120 to form a single heat conductive layer. 110a may be formed. The same configuration as that of the one-side heat-conducting layer 110a can also be adopted for the other-side heat-conducting layer 110b. The one-side heat-conducting layer 110a and the other-side heat-conducting layer 110b may have the same configuration, or may have different configurations.

In the first embodiment, the one-side heat-conducting layer 110a and the other-side heat-conducting layer 110b are formed by vapor-depositing aluminum on the surface of a flexible resin film. As a result, it is possible to reduce the amount of metal used while maintaining heat conduction efficiency. In addition, the strength of the laminated covering sheet 100 can be increased.

The specific aspect of the heat insulating layer 120 is not particularly limited as long as it can exhibit a heat insulating effect. The heat insulating layer 120 can be formed of foam such as foamed resin or foamed rubber. Alternatively, the heat insulating layer 120 can be made of air packing (a bubble sheet formed by laminating a plurality of flexible resin sheets and forming air bubbles between them), fibers, or the like. The heat insulating layer 120 may be formed by combining multiple types of materials. In the first embodiment, the heat insulating layer 120 has a two-layer structure in which the one side heat insulating layer 120a and the other side heat insulating layer 120b are laminated, but the one side heat insulating layer 120a and the other side heat insulating layer 120b have the same structure. may be employed, or a different configuration may be employed. In the first embodiment, the one-side heat insulating layer 120a and the other-side heat insulating layer 120b are both made of foamed resin obtained by foaming thermoplastic resin.

The thickness W ₁ (FIG. 2) of the heat insulating layer 120 is also not particularly limited. However, if the heat insulating layer 120 is too thin, it may become difficult to obtain the desired heat insulating effect. Therefore, the thickness W1 of the heat insulating layer 120 is preferably ₁ mm or more, more preferably 1.5 mm or more. On the other hand, if the heat insulation layer 120 is too thick, there is a possibility that coldness or warmth will be difficult to be transmitted to the cold insulation and heat insulation target T. In addition, the cold insulation/heat insulation device 1 may become thick and bulky. Therefore, the thickness W1 of the heat insulating layer ₁₂₀ is preferably 4 mm or less, more preferably 3 mm or less. The thickness W1 of the heat insulating layer 120 in the _first embodiment is approximately 2 mm.

The one-side heat-conducting layer 110a, the one-side heat-insulating layer 120a, the other-side heat-insulating layer 120b, and the other-side heat-conducting layer 110b do not need to be adhered to each other, and may be independent (or may be separate members). ). Further, another layer may be interposed between each of these layers. However, as adopted in the first embodiment, the covering laminated sheet 100 in which the one-side heat conductive layer 110a, the one-side heat insulating layer 120a, the other-side heat insulating layer 120b, and the other-side heat conductive layer 110b are laminated and bonded in advance is used. When the covering member 20 is formed using the material, the labor required for manufacturing the cold insulating and heat retaining device 1 can be greatly reduced.

There is no particular limitation on the method of adhering the one-side heat-conducting layer 110a and the one-side heat-insulating layer 120a. As the bonding method, heat welding, bonding using an adhesive, or the like can be adopted. In the first embodiment, as already described, the one-side heat conductive layer 110a is formed by depositing aluminum on the surface of a flexible resin film. As shown in the enlarged view of FIG. 2, the bonding between the one-side heat-conducting layer 110a and the one-side heat-insulating layer 120a is achieved by bonding is performed by partially heat-sealing. As a result, a space can be secured between the one-side heat-conducting layer 110a and the one-side heat-insulating layer 120a, and the heat-insulating properties of the covering laminate sheet 100 can be further enhanced. The same applies to the method of adhering the other-side heat conductive layer 110b and the other-side heat insulating layer 120b. The method of adhering the one-side heat insulating layer 120a and the other-side heat insulating layer 120b is also not particularly limited, and heat welding, adhesion using an adhesive, or the like can be employed.

The cold insulating and heat insulating agent 11 filled in the cold insulating and heat insulating material 10 is not particularly limited in its specific configuration as long as it can exhibit a cold storage function or heat storage function, and may be gel or sol. A substance, a liquid substance, or a solid substance can be adopted. As the gel-like substance, a relatively soft gel having fluidity at room temperature, a relatively hard gel formed in a bead shape, or the like can be used. In the first embodiment, a gel-like cold-insulating/heat-retaining agent 11 having fluidity at room temperature is employed. The member that wraps the cold insulator 11 is not limited to the resin bag 12, and a rigid resin case or the like may be employed.

The packaging sheet 30 can be omitted, but by providing it, the covering member 20 can be prevented from being damaged. In addition, it is possible to make the contact of the cold insulating/heat insulating device 1 mild against the skin. The packaging sheet 30 may partially cover the covering member 20, but preferably covers the whole. In the first embodiment, as shown in FIG. 2, two packaging sheets 30 are overlapped and their peripheral edges are heat-sealed to form a bag body, in which the covering member 20 is enclosed. This makes it difficult for the user to take out the covering member 20 and the cold insulation/heat insulating material 10 from the packaging sheet 30, thereby preventing the structure of the covering member 20 from collapsing. The material of the packaging sheet 30 is not particularly limited, and can be made of resin, cloth, rubber, or the like. In the first embodiment, the packaging sheet 30 is made of thermoplastic resin.

In the first embodiment, as shown in FIG. 1, a front surface 1a (outer surface) or a rear surface 1b (cooling surface) is provided at a portion of the packaging sheet 30 that is disposed on the back surface 1b of the cold insulator 1. An identification display 31 is provided for displaying which one. As a result, the front surface 1a and the back surface 1b of the cold insulator/heat insulator 1 can be distinguished at a glance. The identification display 31 may be provided on the front surface 1a. A decoration 32 may also be applied to the packaging sheet 30 . As a result, the design of the cold insulator 1 can be enhanced. Alternatively, the packaging sheet 30 may be made of a transparent material, and the identification display 31, the decoration 32, and the like may be provided inside the packaging sheet 30. FIG.

2. Second Embodiment FIG. 4 is a cross-sectional view showing the cold insulating and heat retaining device 1 of the second embodiment cut along the same plane as in FIG. In the cold insulator 1 of the second embodiment, as shown in FIG. 4, two covering laminated sheets 100 having a four-layer structure are laminated in the thickness direction to form the front side covering portion 21 . In other words, the front-side covering portion 21 in the second embodiment has a structure in which two sets of lamination units for covering are overlapped, and has an eight-layer structure. As a result, the thickness of the cold insulator/heat insulator 1 can be reduced compared to the cold insulator/heat insulator 1 of the first embodiment, and the cold insulator/heat insulator 1 can be made compact.

The cold insulating and heat retaining device 1 of the second embodiment is the covering laminated sheet 100 (coating member 20) obtained by removing the fourth portion 100d from the covering laminated sheet 100 for the cold insulating and heat retaining device 1 of the first embodiment shown in FIG. It can be produced by covering the cold insulating and heat insulating material 10 using That is, the second folding step shown in FIG. 3(d) is not performed in the manufacturing process of the cold insulating and heat retaining device 1 of the second embodiment. Other than this, the same configuration as in the first embodiment can be adopted.

3. Third Embodiment FIGS. 5A and 5B are diagrams for explaining the configuration and manufacturing method of a cold insulating and heat retaining device 1 according to a third embodiment. In the third embodiment, as shown in FIG. 5( a ), a single T-shaped laminated covering sheet 100 (covering member 20 ) is used to cover the cold insulating and heat insulating material 10 . This laminated covering sheet 100 has a central portion 100e formed in a substantially rectangular shape, and first peripheral portions 100f provided continuously on three sides of the four sides of the central portion 100e excluding one short side. , a second peripheral portion 100g and a third peripheral portion 100h. As shown in FIG. 5(b), the cold insulation/thermal insulation material 10 is placed on the central portion 100e, and the first peripheral portion 100f, the second peripheral portion 100g and the third peripheral portion 100h are respectively folded back and placed on the central portion 100e. By stacking, as in the first embodiment shown in FIG. 2, a front side covering portion 21 having three laminated covering sheets 100 and a back side covering portion 22 having only one covering laminated sheet 100 are formed. A covering member 20 can be formed with.

In the cold insulator 1 of the third embodiment, all of the three sets of laminated covering units constituting the front side covering portion 21 are continuous with one set of covering laminated units constituting the back side covering portion 22. there is As a result, the coldness and warmth of the cold insulating and heat insulating material 10 can be more easily transmitted in the surface direction within the covering member 20 . In addition, the insulation effect of the covering member 20 can be enhanced to prolong the cold insulation/heat insulation effect of the cold insulation/heat insulation device 1 . Furthermore, in the covering step in the third embodiment, it is not necessary to form the bag portion by adhesion or the like. Therefore, the manufacturing process of the cold insulating/heat insulating device 1 can be simplified. Other than this, the same configuration as in the first embodiment or the second embodiment can be adopted.

4. Fourth Embodiment FIGS. 6A and 6B are diagrams for explaining the configuration and manufacturing method of a cold insulator 1 according to a fourth embodiment. In the fourth embodiment, as shown in FIG. 6(a), a single cross-shaped laminated covering sheet 100 (covering member 20) is used to cover the cold insulating and heat insulating material 10. As shown in FIG. This laminated covering sheet 100 includes a central portion 100e formed in a substantially rectangular shape, and a first peripheral portion 100f, a second peripheral portion 100g, and a third peripheral portion provided continuously on the four sides of the central portion 100e. 100h and a fourth peripheral portion 100i. By placing the cold insulation/heat insulating material 10 on the center portion 100e, folding the first peripheral portion 100f, the second peripheral portion 100g, the third peripheral portion 100h, and the fourth peripheral portion 100i and overlapping them on the center portion 100e, It is possible to form a covering member 20 having a front side covering portion 21 ( FIG. 2 ) in which four laminated covering sheets 100 are stacked and a back side covering portion 22 having only one laminated covering sheet 100 . Other than this, the same configuration as in the first embodiment, second embodiment, or third embodiment can be adopted.

5. Application The use of the cold insulator 1 according to the present invention is not particularly limited. The cold-insulating/heat-retaining tool 1 according to the present invention can be used for cold-insulating/heat-retaining foods and the like, but is particularly suitable for cold-retaining/heat-retaining the bodies of humans and animals. The method of holding the cold insulation/heat insulation tool 1 near the cold insulation/heat insulation object T is not particularly limited either. In the case where the target T for cold insulation and heat retention is the body of a human being or an animal, as a method of holding the cold insulation and heat retention device 1, for example, cold insulation and heat retention clothes can be adopted. That is, a cold insulation/heat insulation garment having a cold insulation/heat insulation mounting portion for attaching the cold insulation/heat insulation equipment 1 is prepared, and the cold insulation/heat insulation equipment 1 that has been cooled or heated in advance is attached to the cold insulation/heat insulation equipment mounting portion. By having the object T (human or animal) to wear it, the object T can be kept cold and warm comfortably for a long time. The cold insulator/heat insulator attaching portion is not limited to a specific aspect thereof. As the attachment portion for the cold insulator/heat insulator, a pocket-shaped portion capable of accommodating the cold insulator/heat insulator 1 therein, or a portion to which the cold insulator/heat insulator 1 can be attached using a hook-and-loop tape, a button, a string, or the like can be adopted. .

6. Experiment An experiment for evaluating the cold insulation and heat retention effect of the cold insulation and heat retention device 1 according to the present invention was conducted in the following manner.

[Example]
As the cold-insulating/heat-retaining tool 1 of the example, one equivalent to the cold-insulating/heat-retaining tool 1 of the first embodiment shown in FIG. 2 was used. As the cold insulation and heat insulation material 10, a resin bag filled with about 200 g of gel cold insulation and heat insulation was used. As the one-side heat conductive layer 110a and the other-side heat conductive layer 110b of the covering laminated sheet 100 forming the covering member 20, a flexible resin film having aluminum vapor-deposited on its surface was employed. As the heat insulating layer 120, a laminate of a heat insulating layer 120a on one side and a heat insulating layer 120b on the other side made of foamed resin is used. The thicknesses of the one side heat insulating layer 120a and the other side heat insulating layer 120b were both about 1 mm.

This cold-insulating/heat-retaining tool was allowed to stand in a freezer for 24 hours. A thermocouple temperature sensor was attached to the back surface of the cold insulator taken out of the freezer, and the temperature was measured every 30 seconds for 300 minutes in a thermo-hygrostat at room temperature of 35°C and humidity of 65%.

[Comparative example]
FIG. 7 is a cross-sectional view showing the cold insulating and heat retaining device 9 of the comparative example cut along a plane substantially parallel to the thickness direction. As the cold insulator 9 of the comparative example, one provided with a cold insulator 10, a covering member 90, and a packaging sheet 30 was used as shown in FIG. The same cold insulating heat insulating material 10 and packaging sheet 30 as in the example were used. As the covering member 90, a covering sheet 900 having a heat-conducting layer 910 on only one side of a heat-insulating layer 920 was formed into a bag shape with the heat-conducting layer 910 facing outward. The same heat insulating layer 920 as the one side heat insulating layer 120a of the example was used, and the same heat conductive layer 910 as the one side heat conductive layer 110a of the example was used. This cold insulator 9 was evaluated under the same conditions as in the example.

[result]
FIG. 8 is a graph showing the results of evaluation experiments. As shown in FIG. 8, the cold-retaining and heat-retaining equipment of the example showed a lower temperature than the cold-retaining and heat-retaining equipment of the comparative example from immediately after the start of the measurement to the end of the measurement. In the cold insulator/heat insulator of the comparative example, the temperature began to rise from about 120 minutes after the start of measurement, and reached around 34°C at about 210 minutes after the start of measurement, whereas in the cold insulator/heat insulator of the example, the measurement was started. Even when 300 minutes had passed since then, the temperature was 29°C or less. As described above, the cold-insulating/heat-retaining tool according to the present invention can exhibit an excellent cold-insulating/heat-retaining effect for a long period of time even under high temperature and high humidity conditions.

Reference Signs List 1 cold insulator 1a front side 1b back side 10 cold insulator 11 cold insulator 12 resin bag 20 coating member 21 front side coating part 21a front side first layer unit 21b front side second layer unit 21c front side third layer unit 22 back side coating part 22a back side lamination unit 23 bag part 30 packaging sheet 31 identification mark 32 decoration 100 covering laminate sheet 100a first part 100b second part 100c third part 100d fourth part 100e center part 100f first periphery Portion 100g Second peripheral portion 100h Third peripheral portion 100i Fourth peripheral portion 110a One side heat conductive layer 110b Other side heat conductive layer 120 Heat insulating layer 120a One side heat insulating layer 120b Other side heat insulating layer

Claims (8)

a cold insulation material;
A cold insulating and heat insulating material comprising a covering member having a back side covering part covering a side of a cold insulating and heat insulating material on which a cold insulating and heat insulating object is arranged, and a front side covering part covering a side opposite to the back side covering part of the cold insulating and heat insulating material. is a tool,
The front side covering part and the back side covering part are
an insulating layer;
a one-side heat-conducting layer arranged on one side in the thickness direction of the heat-insulating layer;
A cold-insulating/heat-retaining device, comprising: a heat-conducting layer disposed on the other side in the thickness direction of the heat-insulating layer.
The front-side covering portion has a structure in which a plurality of sets of covering lamination units each including a one-side heat-conducting layer, a heat-insulating layer, and the other-side heat-conducting layer are stacked,
2. The cold-insulating/heat-retaining device according to claim 1, wherein the back side covering portion has only one set of covering lamination units.
3. The cold insulation and heat retention according to claim 2, wherein at least one set of the plurality of sets of laminated covering units provided in the front side covering portion and one set of laminated covering units provided in the back side covering portion are provided continuously with each other. equipment.
4. The cold-retaining/heat-retaining device according to any one of claims 1 to 3, wherein the covering member is formed by folding a laminated covering sheet having a heat-conducting layer on one side, a heat-insulating layer, and a heat-conducting layer on the other side. .
The heat insulating layer includes a foamed resin layer,
5. The cold-retaining/heat-retaining device according to any one of claims 1 to 4, wherein the one-side heat-conducting layer and the other-side heat-conducting layer comprise metal layers.
The cold-retaining/heat-retaining device according to any one of claims 1 to 5, further comprising a packaging sheet covering the outer side of the covering member.
A method for manufacturing a cold insulating/heat insulating device according to any one of claims 1 to 6.
A cold-retaining and heat-retaining garment comprising the cold-retaining and heat-retaining device according to any one of claims 1 to 6.

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