JP3229667B2 - Multi-layer coolant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a multilayer coolant.
More specifically, the present invention relates to a multilayer coolant capable of maintaining a proper cooling sensation for a long time.

[0002]

2. Description of the Related Art In general, a cooling material is used as a pillow in order to reduce heat during heat generation or to relieve heat and heat when sleep cannot be achieved due to heat. Conventionally, as this coolant, a two-layer structure type of an antifreezing composition and a freezing composition (see Japanese Utility Model Laid-Open No. 58-67424, Japanese Utility Model Laid-Open No. 61-86074, As shown in FIG. 4, a combination type of an air layer such as a urethane foam provided with a plurality of through-holes and a granular material layer and a cold insulator (Japanese Utility Model Laid-Open No. 61-177623).
Japanese Utility Model Laid-Open No. 4-11371) is known.

[0003]

Generally, the properties required of a coolant include the ability to maintain a cool sensation for a long time and the excellent fit to the human body, especially the head. In the two-layer structure type of the antifreezing composition 2 and the freezing composition 3, the cold heat is directly transmitted to the head, and the cooling sensation is too strong. Since it becomes stiff itself, it has a drawback that it cannot sleep well due to inferior tactile sensation and fit to the head, and complains of discomfort in infants. On the other hand, in the combination type of the air layer 12 and the cold insulator 11, the cold insulator 11
However, there is a drawback that the cold is transmitted directly to the head, so that the cooling sensation is too strong or, conversely, a sufficient cooling sensation is not transmitted.

[0004] It is an object of the present invention to solve the above-mentioned drawbacks and to provide a multi-layer type coolant capable of maintaining a proper cooling sensation on the human body, especially on the head, for a long time. Another object of the present invention is to provide a multilayer cooling material which has less discomfort to the human body, especially the head, and has excellent fit.

[0005]

As a result of various studies to achieve the above object, the present inventor has found that in a two-layer structure type of an antifreeze composition layer and a freeze composition layer, both layers are made of foam. ,
We found that a suitable cooling sensation could be maintained for a long time by partitioning with a heat insulating material selected from nonwoven fabric and corrugated cardboard and by forming a through hole that allowed both layers to partially contact this heat insulating material. Thus, the present invention has been completed.

That is, the multilayered coolant of the present invention is a foam having a through hole in which the antifreeze composition layer and the freezing composition layer can at least partially indirectly contact each other . Unfortunate
Woven cloth, disposed opposite to each other with a heat insulating material selected from cardboard , and housed in a bag body, desirably, the above-mentioned through hole is the entire area where the antifreeze composition layer and the freeze composition layer face each other. Is formed in the heat insulating material so as to be 30% to 80% of the above, and the freezing composition layer is divided into two or more parts so as to be bent at least at the center.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic sectional view showing a multilayer coolant of the present invention. In the figure, T is a multilayer type cooling material, in which an antifreeze composition layer 1 and a freezing composition layer 2 are disposed opposite to each other with a heat insulating material 3 interposed therebetween, and housed in a bag 4. Further, through holes 31 are formed in the heat insulating material 3 so that the antifreeze composition layer 1 and the freeze composition layer 2 can be at least partially indirectly contacted with each other.

The antifreeze composition used in the present invention includes:
Gelatin, polyacrylate, polyvinyl alcohol,
Water-soluble or superabsorbent polymers such as polyethylene oxide, sodium carboxymethylcellulose and polyacrylamide; polyhydric alcohols such as propylene glycol and ethylene glycol; NaCl, KCl, and Ca
Sol component composed of an electrolyte such as Cl ₂ , water or the like, or a gel-like material subjected to a suitable crosslinking treatment, rubber components such as isoprene, styrene-isoprene ternary block copolymer, mineral oil, olive oil, oil such as liquid paraffin Examples thereof include a sol composed of a composition in which components and, in some cases, water are emulsified, and a gel that has been subjected to an appropriate crosslinking treatment. Among them, a sol or gel made of a water-soluble or superabsorbent polymer having excellent flexibility and head stability, a polyhydric alcohol and water is preferable.

[0009] Further, as the freezing composition, gelatin,
A water-soluble or superabsorbent polymer such as polyacrylic acid salt, polyvinyl alcohol, polyethylene oxide, sodium carboxymethylcellulose, polyacrylamide, or a sol made of water or the like, or a gel obtained by performing an appropriate crosslinking treatment is preferably used. it can.

[0010] As the heat insulating material, foam, non-woven fabric,
Although corrugated cardboard or the like can be used, it is preferable to use a flexible foam since the fit of the coolant to the human body is further improved. Examples of the foam include polyethylene foam, polyvinyl chloride foam, and polyurethane foam. The heat insulating material is used after being molded to a thickness of 1 to 6 mm, preferably 2 to 4 mm. If the thickness of the heat insulating material is less than 1 mm, it is not preferable because the cooling feeling of the freezing composition cannot be reduced. On the other hand, if the thickness of the heat insulating material exceeds 6 mm, the cooling heat of the freezing composition layer 2 is not sufficiently transmitted to the outside, which is not preferable.

The multilayer coolant T of the present invention is manufactured by the following method. When the antifreeze composition layer 1 is used on one side of the heat insulating material 3 and a gel is used, the molded product may be used as it is or may be put in a bag and molded to have a thickness of 5 to 20 mm, preferably. Is formed to 7 to 17 mm. Then, on the other side of the heat insulating material 3, the freezing composition layer 2 is used as it is when a gel material is used, or it is used as it is, or it is put in a bag and molded to have a thickness of 10 to 10. The thickness is 30 mm, preferably 15 to 25 mm.

In addition, when a sol is used as the antifreeze composition and / or the freeze composition,
In order to prevent this from leaking outside, it is necessary to store it in a bag and seal it. As the sealing bag, nylon, polyester, polypropylene, or polyethylene can be used, but it is preferable to use a composite film including a nylon film having excellent strength and a sealing layer.

In addition, a through hole 31 is formed in the heat insulating material in advance so that the antifreeze composition layer 1 and the freeze composition layer 2 can be at least partially indirectly contacted with each other. The through hole 31 has a size such that the antifreeze composition layer 1 and the freezing composition layer 2 can be sufficiently adhered to each other by using a sealing machine, a Thomson punching machine, or the like, and has a shape such as a square shape or a circular shape. It is formed as follows.
If the size of the through hole 31 is too small, punching becomes difficult, and cold air is difficult to be transmitted. .

The through hole 31 has an area at least indirectly in contact with the entire area of the layer where the antifreeze composition layer 1 and the freezing composition layer 2 face each other with the heat insulating material 3 interposed therebetween. Is 3
The heat insulating material 3 is formed so as to be 0 to 80%, preferably 50 to 70%. If the area of the through hole 31 is less than 30%, the cold of the freezing composition layer 2 cannot be sufficiently transmitted to the antifreezing composition layer 1, and therefore, the cold transmitted from the multilayer cooling material T to the head can not be transmitted. It is not preferable because the feeling is poor and it cannot endure practical use. On the other hand, when it exceeds 80%, the cold heat of the freezing composition layer 2 is excessively transmitted to the antifreezing composition layer 1, and the multilayer coolant T
The cooling sensation transmitted from the head to the head is too strong, while the duration of the cooling effect tends to be short, which is not preferable.

In the present invention, it is preferable that the above-mentioned coolant be bent at the central portion, because the feeling of strangeness to the head is alleviated and the fit to the head is improved.
That is, when the freezing composition layer 2 is divided into at least 2 or more, preferably 2 to 6 pieces, the coolant can be bent at the central portion, and the sense of discomfort to the head is reduced. preferable. If the degree of division is 7 or more, the frozen composition is easily melted, and the durability of the cooling sensation decreases, which is not preferable. In addition, the antifreeze composition layer 1 may be divided into a plurality of pieces and disposed. Thereby, when the antifreeze composition is a sol, it is possible to prevent the localization thereof, which is preferable.

The above-mentioned coolant is accommodated in the bag 4, and the bag is sealed to produce a multilayer coolant. As the bag 4, a film of soft vinyl chloride, polyurethane, urethane-vinyl chloride copolymer, modified polyolefin or the like having excellent low-temperature characteristics can be used. As shown in FIG. 2, it is preferable to use a composite film obtained by quilting a thin foam, since the soft feeling on the head is further improved.

The multilayer coolant produced by the above method is cooled in a freezer or the like at 0 to -30 ° C. for 3 to 24 hours to freeze the layer of the freezing composition, and then applied to a cooled object such as a human body. Use with contact.

[0018]

According to the above construction, the antifreeze composition layer and the freezing composition layer are disposed opposite to the heat insulating material, and a through hole is formed in the heat insulating material to form the antifreeze composition layer and the freezing composition. Since the composition layer was brought into partial contact with the composition layer, the cold heat of the freezing composition was once transmitted to the antifreeze composition layer, and then transmitted to the head. It becomes possible to give a cool feeling. In addition, since the heat transfer mechanism having the above-described configuration is formed, heat transfer from the head to the freezing composition layer is suppressed, and cold heat from the freezing composition layer is continuously supplied for a long time. Become. In addition, the antifreeze composition layer and the freezing composition layer are arranged opposite to each other via a heat insulating material, and the freezing composition layer is divided into a plurality of pieces. It is possible to bend and the discomfort to the head is alleviated, and the fit to the head is excellent.

[0019]

The present invention will be specifically described below with reference to examples. It goes without saying that the present invention is not limited to this. Example 1 (Preparation of antifreeze composition layer) Polyvinyl alcohol 100 parts Borax 1 part Water 800 parts Propylene glycol 400 parts The above composition was mixed with a disper stirrer, and 300 g of this mixture was put in a nylon / PE laminated film bag. The mixture was gelled to prepare an antifreeze composition layer.

(Preparation of Freezing Composition Layer) Polyvinyl alcohol 100 parts Borax 2 parts Water 800 parts Dehydroacetate Na 0.3 part The above composition was mixed with a disper stirrer to prepare two molded gels of 400 g of the mixture. Then, a freezing composition layer was prepared.

(Preparation of heat insulating material) Length 150 mm, width 230 mm
A polyethylene foam (2 mm thick, 30-fold foam) sheet was formed with a through hole through which the antifreeze composition layer and the freezing composition layer could come into contact, and used as a heat insulating material. Square holes were formed at four places on the sheet by a Thomson punching machine so that the area of the through hole was 50% of the area of the sheet.

(Preparation of Coolant) Soft vinyl chloride was processed by a high-frequency welder to prepare an outer bag 180 mm long and 300 mm wide, and as shown in FIG. 1. A freezing composition layer 2 and a heat insulating material 3 were provided and sealed to produce a double layer coolant T.

Examples 2 to 3 The same as Example 1 except that the through holes 31 of the heat insulating material were formed so as to cover 30% (Example 2) and 80% (Example 3) of the sheet area. In this way, a double-layer coolant was produced.

Comparative Example 1 A cooling material having a two-layer structure was produced in the same manner as in Example 1 except that no heat insulating material was used.

Comparative Example 2 A double-layer coolant was prepared in the same manner as in Example 1 except that no through-hole was formed in the heat insulating material sheet.

Comparative Examples 3 to 4 The same as Example 1 except that the through holes 31 of the heat insulating material were formed so as to cover 20% (Comparative Example 3) and 90% (Comparative Example 4) of the sheet area. In this way, a double-layer coolant was produced.

Comparative Example 5 In Example 1, a two-layer cooling material was produced without using a heat insulating material and further without dividing the freezing composition.

Comparative Example 6 A cooling material was used in the same manner as in Example 1 except that the antifreeze composition was not used, and a 6-mm-thick polyurethane foam expanded 30 times was used as a heat insulating material. Produced.

Example 4 (Preparation of antifreeze composition layer) Water 100 parts Propylene glycol 50 parts Superabsorbent polymer 1 part (Sunwet, manufactured by Sanyo Chemical Industries, Ltd.) The above composition was mixed by hand, and this mixture was mixed. 300 g was put in a nylon / PE laminated film bag and gelled to prepare an antifreeze composition layer.

(Preparation of Freezing Composition Layer) Water 100 parts Na dehydroacetate 0.03 part Superabsorbent polymer 2 parts (Sunwet, manufactured by Sanyo Chemical Industries, Ltd.) The above composition was mixed by hand, and this mixture was mixed. And 200 g each of the nylon / PE laminated film bags divided into four sections to prepare a freezing composition layer.

(Preparation of heat insulating material) Length 150 mm, width 230 mm
A polyethylene foam (3 mm thick, 15-fold foam) sheet was formed with a through hole through which the antifreeze composition layer and the freeze composition layer could come into contact, thereby forming a heat insulating material. The area of this through hole is set to 8% of the sheet by a sealing machine so as to be 60% of the area of the sheet.
Square holes were formed at several places.

(Preparation of Coolant) As shown in FIG. 2, a soft vinyl chloride film was combined with a sheet obtained by quilting a vinyl chloride foam to a length of 180 mm and a width of 300 mm.
Of the antifreeze composition 1,
The freezing composition 2 and the heat insulating material sheet 3 were provided and sealed to produce a double layer coolant T.

Example 5 A double layer coolant was prepared in the same manner as in Example 4 except that the antifreeze composition layer was replaced with the following antifreeze composition layer. (Preparation of Antifreeze Composition Layer) Styrene-Isoprene Triblock Copolymer 100 parts (Califlex TR1107, manufactured by Shell Chemical Co., Ltd.) Liquid paraffin (trade name Smoyl P-350, Matsumura Sekiyu) 800 parts The mixture was mixed at 100 ° C. with a disper stirrer, and 200 g of the mixture was placed in a nylon / PE laminated film bag, cooled and gelled, to prepare an antifreeze composition layer.

(Evaluation of Coolant) For each of the coolants obtained in Examples 1 to 5 and Comparative Examples 1 to 6, the cooling sensation, feeling of use, and cooling time were evaluated according to the following criteria. The results shown were obtained. Evaluation criteria Cool sensation: After cooling to -20 ° C, the coldness when contacted with the head at room temperature. Rating 1 ... Not cold, 2 ... Not too cold, 3 ... Moderate, 4 ... Cold, 5 ... Too cold Feeling of use: The degree of fit and discomfort when the head is placed at room temperature after cooling to -20 ° C. ◎: Very comfortable, ○: Comfortable, Δ: Uncomfortable, ×: Extreme Cooling time: After cooling to -20 ° C, leave at room temperature for 10 hours.
The time to rise to ° C. was measured. However, the above and the above evaluations are for men in their 20s
The average value of the evaluations by five people, two women, and a total of five people.

[0035]

[Table 1]

[0036]

As described above in detail, the multilayer type coolant of the present invention has an antifreeze composition layer and a freezeability composition layer opposed to a heat insulating material, and a through hole is formed in the heat insulating material. As the antifreeze composition layer and the antifreeze composition layer were formed so as to be in partial contact with each other, the cold heat of the antifreeze composition was once transmitted to the antifreeze composition layer, and then to the head. As a result, the head can be given an appropriate soft cooling sensation. In addition, since the heat transfer mechanism having the above-described configuration is formed, heat transfer from the head to the freezing composition layer is suppressed, and cold heat from the freezing composition layer is continuously supplied for a long time. Become. In addition, since the antifreeze composition layer and the freeze composition layer are arranged to face each other via the heat insulating material, and the freeze composition layer is divided into a plurality of pieces, the coolant is disposed at the center. It is possible to bend and the discomfort to the head is alleviated, and the fit to the head is excellent. Therefore, according to the present invention, compared with the conventional one, moderate cooling sensation lasts for a long time,
Moreover, a multi-layer coolant excellent in the fit to the human body can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a multilayer coolant of the present invention.

FIG. 2 is a schematic sectional view showing one embodiment of the multilayer coolant of the present invention.

FIG. 3 is a schematic sectional view showing an example of a conventional multilayer coolant.

FIG. 4 is a schematic sectional view showing an example of a conventional coolant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antifreeze composition layer 2 Freeze composition layer 3 Heat insulation material 31 Through hole 4 Bag body T Multi-layer type cooling material

Claims (3)

(57) [Claims] 1. The antifreeze composition layer and the freeze composition layer,
Foaming with a through hole that allows them to partially contact
A multi-layered cooling material that is disposed opposite to each other with a heat insulating material selected from the group consisting of a body, a nonwoven fabric, and a cardboard , and housed in a bag. 2. The heat insulating material according to claim 1, wherein the through holes are formed in the heat insulating material so as to cover 30 to 80% of the total area of the layer where the antifreeze composition layer and the freeze composition layer oppose each other. The multilayer coolant as described. 3. The multilayer cooling material according to claim 1, wherein the freezing composition layer is divided into two or more parts so as to bend at least the central part.