JP2928496B2 - Multipurpose cooling sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the use of a packaging bag or cardboard insole as a packaging material for maintaining freshness in transporting fresh goods requiring cold insulation, or as a sweat wipe during a sports break, or The present invention relates to a cooling sheet used for multiple purposes such as use as an oscillating sheet.

[0002]

2. Description of the Related Art Conventionally, in the transportation of fresh products, a cooling material is usually put in a packed cardboard or the like to play a role of maintaining freshness.

[0003]

However, the cold insulator does not function as it is, but after freezing it in a freezer,
Like ice, it was used for cooling, and it was essential to freeze it in the freezer. It was impossible to create a cold one and use it whenever you wanted to use it.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a multi-purpose apparatus that can be used in a cold state whenever it is needed without using a freezer and ice and with only water. Another object of the present invention is to provide a cooling sheet which can be used for a cooling device.

[0005]

For this purpose, the present invention provides a pair of water-absorbent cooling sheets, a resin film package bag interposed between the pair of water-absorbent cooling sheets, A water-absorbent exterior nonwoven fabric coated with a water-absorbent cooling sheet main body, wherein the pair of water-absorbent cooling sheet main bodies is a water-absorbing polymer on a sheet main body such as kraft paper which is in contact with the package bag of the resin film. A water-absorbent nonwoven fabric is integrally bonded and bonded through a mixed layer of salt particles and hot melt powder, and the resin film package bag is filled with a vaporized liquid that reacts with water and vaporizes, In addition, an opening means of the resin film package bag is provided, and the resin film package bag can be opened from the outside of the pair of water-absorbent cooling sheets through the opening means. The superposed peripheral portions of the main body of the pair of water-absorbent cooling sheets and the exterior nonwoven fabric are integrally thermally bonded to each other to form a sheet of an appropriate size, and the exterior nonwoven fabric and the main body of the water-absorbent cooling sheet are provided. , The package bag of the resin film is opened, the vaporized liquid is mixed with the absorbed water, and the absorbed water is cooled.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an example of a multipurpose cooling sheet according to the present invention, and FIG. 2 is an enlarged cross-sectional view of a partly omitted line along line 2-2 in FIG. , A water-absorbent cooling sheet main body, a resin film package bag, and an exterior nonwoven fabric.

[0007] A pair of water-absorbent cooling sheet bodies 10 comprises a mixed layer 15 of a water-absorbing polymer 12 having a water absorbing capacity of about 800 times its own weight, salt grains 13 and hot melt powder 14 on a sheet body 11 such as kraft paper. The water-absorbent nonwoven fabric 16 is polymerized through the intermediary, and the periphery is integrally heat-bonded to form a sheet of an arbitrary size. Note that the salt particles 13 are for maintaining the cooling state of the entire sheet for a long time, and are one third to one third of the water absorbing polymer 12.
/ 5. The hot melt powder 14 is a resin hot melt powder having a melting point of about 100 ° C. or higher, whereby the water-absorbing polymer 12 and the salt particles 13 are adhered to the sheet main body 11 in a substantially uniform state. The non-woven fabric 16 is a highly water-absorbing non-woven fabric made of a sheet by collecting innumerable bristles of pure pulp paper.

[0008] The mixed layer 15 is formed as shown in FIGS.
Is formed on the entire surface of the sheet main body 11 as shown in FIG. 2, but is formed with a regular array having a predetermined interval so that the sheet can be used even when the sheet is cooled and frozen. It is formed with an irregular arrangement (see FIGS. 3 and 4) (see FIGS. 5 and 6).

A vaporizing liquid 21 which reacts with water and vaporizes is enclosed in a package bag 20 made of a resin film such as polypropylene, polyester, or polyethylene. This vaporized liquid 21 has no harmful effects on the human body with toxic gas, etc., does not cause pollution such as air pollution, has no danger of ignition or ignition, has no skin irritation, does not cause low-temperature burns, It is necessary to satisfy various conditions such as no generation of pathogenic bacteria, and examples thereof include liquefied nitrogen, alternative Freon, carbon dioxide and the like. The amount of the vaporized liquid 21 to be filled is set such that the sheet is appropriately cooled depending on the type of the liquefied gas, the use of the sheet, and the amount of absorbed water.

The package bag 20 made of a resin film is provided with a means for opening the package bag 20. This opening means is a cut tape 22. As shown in FIGS. 1 and 2, the cut tape 22 is adhered to the central portion of the inner surface of the package bag 20 made of a resin film, and the adhesive end portion thereof is provided. Is folded back to the outside through the central portion of the outer surface of the package bag 20 to form a picked end 23.

The pair of water-absorbent cooling sheets 10
A package bag 20 made of a resin film in which a vaporized liquid 21 is sealed at a substantially central portion between the cutout tape 22 and the package end 20 of the cutout tape 22 is fixed to the outside of the main body 10 of the water-absorbent cooling sheet. Furthermore, a pair of water-absorbent cooling sheet main bodies 1
The outer periphery of the outer non-woven fabric 30 is covered with a water-absorbent exterior nonwoven fabric 30, and the peripheral edges of the exterior nonwoven fabric 30 and a pair of the water-absorbent cooling sheet main bodies 10 are integrally formed except for the cut tape picking end 23. Heat bonded. The exterior nonwoven fabric 30 used is one subjected to antibacterial processing if necessary.

When the cooling sheet having the above structure is put in water or sprayed with water, water is applied to the exterior nonwoven fabric 3.
It is absorbed by the water-absorbing polymer 12 from 0 to about 800 times its own weight of the water-absorbing cooling sheet main body 10. Then, pick end 2
3 and pulling out the cut tape 22, the resin film package bag 20 is opened by the cut tape 22, and the vaporized liquid 21 therein is mixed with the absorbed water to vaporize, and the heat of vaporization causes absorption of water. Since is cooled, it is used for a variety of purposes, such as shrinking in this cooled state, as a package bag for fresh products, or as an insole for cardboard.

[0013]

Thus, according to the present invention, it is possible to obtain a cold sheet whenever and wherever it is desired to use it, without the need for a freezer or ice, and with water.
This can be used as an oscilloscope, and can be used for various purposes such as packaging bags or cardboard insoles, which are packaging materials for maintaining freshness, in transporting fresh products requiring cold insulation.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of a multipurpose cooling sheet according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a part omitted along the line 2-2 in FIG. 1;

FIG. 3 is an explanatory plan view of a mixed layer of a water-absorbing polymer, salt particles, and hot melt powder.

FIG. 4 is a partially enlarged sectional view of FIG. 3;

FIG. 5 is another planar arrangement explanatory view of a mixed layer of a water-absorbing polymer, salt particles, and hot melt powder.

FIG. 6 is a partially enlarged sectional view of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mainly a pair of water-absorbent cooling sheets 11 Mainly sheet 12 Water-absorbing polymer 13 Salt 14 Hot-melt powder 15 Mixed layer 16 Non-woven fabric 20 Package bag of resin film 21 Vaporized liquid 22 Opening means (cut tape) 23 Pick end 30 Exterior non-woven fabric

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F25D 7/00 F25D 3/00

Claims (3)

(57) [Claims] 1. A pair of water-absorbent cooling sheets, a package bag of a resin film interposed between the pair of water-absorbent cooling sheets, and a water-absorbent exterior nonwoven fabric covering the pair of water-absorbent cooling sheets. The pair of water-absorbent cooling sheet main body, through a mixed layer of a water-absorbing polymer and salt particles and hot melt powder on a sheet main body of kraft paper or the like that is in contact with the package bag of the resin film. A water-absorbent non-woven fabric is integrally bonded by heat.The resin film package bag is filled with a vaporized liquid that reacts with water and evaporates, and is provided with means for opening the resin film package bag. The package bag of the resin film is set in such a manner that it can be opened from the outside of the main body of the pair of water-absorbent cooling sheets via the opening means. The main body and the polymerized peripheral portion of the exterior nonwoven fabric are integrally thermally bonded to form a sheet of an appropriate size, and the exterior nonwoven fabric and the water-absorbent cooling sheet mainly absorb water, and then the resin A multipurpose cooling sheet characterized in that the film package bag is opened, the vaporized liquid and the absorbed water are mixed, and the absorbed water is cooled. 2. The mixed layer of the water-absorbing polymer and the salt particles and the hot melt powder is regularly or irregularly formed so that the sheet can be folded when the water-absorbent cooling sheet main body and the exterior nonwoven fabric are cooled. The multipurpose cooling sheet according to claim 1, wherein the multipurpose cooling sheet is dispersed and provided on a sheet main body. 3. The multipurpose cooling sheet according to claim 1, wherein the exterior nonwoven fabric has been subjected to an antibacterial treatment.