JPS63140273A - Low-temperature insulating article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention is directed to cold-retaining articles used primarily for transportation and quality maintenance of frozen foods, fresh foods, medicines, ice cream, etc. More specifically, 1J describes a pine 1-shaped cold-retaining article formed by sandwiching a mixture obtained by mixing a highly water-absorbing plastic abrasive and a cryogen between two sheets, and a high This invention relates to a cold insulating f1 bag in which a mixture of a water-absorbing plastic material and a cryogen is sealed inside the bag.

[Conventional technology] Nowadays, there are many types of frozen foods, and their popularity is increasing not only in some cities but also on a golden yen scale.At the same time, the demand for safe transportation and storage of fresh foods is also increasing. I've been doing it.

In general, many fresh foods require low temperatures to maintain their consistency, and frozen foods also require low temperatures to prevent them from melting due to temperature. For this reason, cold materials such as bagged moss cold material and dry ice have been placed in returnable boxes and retail packaging cold containers used to transport this type of food from production areas to retail stores. Proposals have been made to incorporate cold-storage substances into the product packaging material itself.

However, a common problem with such cold storage materials and coolants is that they are bulky, and unless large hanging hooks are used, the cooling capacity is insufficient. In addition, as a cold storage material, a bagged cold storage material is generally used, which is a glass bag filled with a gel-like or U-shaped substance that has a cold storage effect and has a large heat capacity r. Each time, the product must be cooled in a refrigerator or the like in advance, and after cooling, it must be taken out and placed in a returnable product box or packaging container, which is a time-consuming problem. On the other hand, dry ice has the disadvantage that there is a risk of burns if touched with bare hands, and the gas generated by dry ice deteriorates the quality of foods such as fresh cream.

The object of the present invention is to provide a novel cold-retaining article that solves the problems of the prior art as described above.

[Means for solving the problem] That is, as a result of various studies, the present invention has developed a super absorbent glass that quickly absorbs water and forms a gel-like substance when it comes into contact with water. This cold-retaining article focuses on the plastic material 14+ and retains the mixture by mixing the plastic material 14+ with an appropriate amount of cold agent. This is a proposal.

In the present invention, a granular or powdered cryogen is blended into a powdered or fibrous superabsorbent plastic material,
This blend is sandwiched between two sheets to form a mat-like body, and the front and back sheets are partially fixed to form a mat-like or sheet-like cold-retaining article.

For the plating sheet covering the mixture, plastic, aluminum, paper, metal foil, or a laminated material thereof is selected from existing fF1 materials in consideration of water resistance, chemical resistance, and economic efficiency. For example, the front sheet 1- is made of a water-permeable material r1 such as a non-woven fabric, the other measured sheet is made of a non-water-permeable sheet made of a plastic material such as polyethylene, and both the front and back sheets are heat-sealed or hot-melted with resin. When partially fixed using other appropriate adhesives, a mat-like article is created that is suitable for cutting out and using each time for wrapping or wrapping fresh food.
You can get rid of it.

This is how you get it! The product allows moisture exuding from fresh foods and/or moisture generated by sweating to penetrate into the interior through the front sheet, or by actively spraying water on the sheet surface, or by injecting water into the interior with a syringe, etc. When the two people touch it, the superabsorbent plastic material comes into contact with water and absorbs hundreds of times more water than Yamanaka in a few minutes, creating a gel-like substance. Also, at this time, the cryogen that comes into contact with water is eluted and an endothermic reaction occurs, so the temperature of the gel body produced is lowered, and this gel body absorbs a large amount of water, resulting in III! ! Despite its size, it maintains its shape and is difficult to separate from water. In addition, as mentioned above, since the superabsorbent plastic increases in volume by absorbing water, a gel body with a large heat capacity M is produced.

Further, in the present invention, a bag-shaped product can be formed by enclosing a mixture of a highly water-absorbent plastic material and a cryogen in a flat, airtight bag made of a plastic sheet or the like. When using such a bag-shaped product, when a small hole is made in the bag and water is injected, the humidity becomes low, similar to the above-mentioned product, and it also swells to form a gel-like substance with a large heat capacity. generated.

As the cooling agent used in the present invention, generally known t, n M ammonium, sodium nitrate, ztrium chloride, etc. are used, but are not limited to these. The highly absorbent plastic snack materials used for this are “Aqua Keep” (Steel Chemical KK), “Sumikagel” (Sumitomo Chemical KK), and “Rin Wet” (Sumitomo Chemical KK).
It is commercially available under trade names such as Sanyo Kasei KK) rsGP502s J (Henkel Japan Co., Ltd.), and is usually supplied in the form of powder, lambda pieces, and particles.

[Example 1] Next, the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 is a perspective view showing the main parts of a cold-retaining article of the present invention in the form of a pine 1 or a sheet, and reference numeral 81 denotes a front sheet made of a water-permeable material tH1 such as a nonwoven fabric. 2 is Brass Jitsukushi-1
To/^ Which non-permeable +! Back sheet made of 1 piece of material. 3
shows a mixture of super absorbent plastic l1 and a cryogen sandwiched between the front sheets in the form of a sandwich.

The highly water-absorbent plastic material i1 is in the form of 41 III strips, and ammonium nitrate beads are uniformly mixed therein to form a mat-like material. The front and back sheets I to 1 and 2 are partially fixed to the heat-melting 18J finger bonding means to hold the internal mixture between the front and back sheets.゜When water penetrates into the inside of the cold-insulating layer article constructed as described above through the front sheet 1, the highly water-absorbent plastic material comes into contact with water and gels, and the ammonium nitrate pieces are eluted into the water and undergo an endothermic reaction. As a result, the temperature of the glue body is reduced.

FIG. 2 shows a cold bag made by enclosing a mixture 3 of a powdered highly water-absorbent plastic material and 1 cum of ammonium t1'1 acid in a water-impermeable plus book bag 4 which is hermetically sealed on all four sides. When a small hole is made in this bag and water is injected, the highly water-absorbing plastic material inside, F+, gels and increases in volume. Because of this, the body is heated to a lower temperature.

In any of the above embodiments, the gel body absorbs three times of water, but the absorbed water is retained by the gel body and is difficult to separate, and the gel body has a long shape. ,'cK
In addition, a double-sided adhesive tape 5 with 1, ', and 1 paper is disposed on one side of the cold bag shown in FIG.

[Effects of the Invention] The cold storage container of the present invention can be used to sprinkle water on the instep when transporting or storing frozen good products or manufactured foods. Just by touching it with one person or with moisture exuding from food, the cooling effect will be exerted, making it the best! J, packaged frozen or fresh! ! 1' Keep food at low temperature 1'
or prevent the product from rising in temperature.

Therefore, like conventional cold storage materials, the number of uses is
You can save yourself the trouble of using a refrigerated container such as a refrigerated container.

Furthermore, since the cold-retaining article of the present invention is a thin and flat product before use, it is easy to handle and store. /1 Functions as a gel-like cold storage material, so it is colder than conventional cold! It is highly useful as an alternative to JI materials and cold storage materials.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are perspective views showing an embodiment of the present invention. 1...Front sheet. 2... Back sheet, 3... Highly absorbent Plus Deck material cryogen mixture, 4... Bag,
5... Double-sided adhesive tape.

Claims (1)

[Claims] 1. A cold-retaining article characterized in that the front and back sides of a mixture of powder particles and/or fiber strips of a highly water-absorbent plastic material and a cold agent are covered with thin sheets. 2. The cold-retaining article according to claim 1, wherein a water-impermeable sheet is polymerized on the back side of the mixture, and a water-permeable sheet is polymerized on the front side, and the front and back sheets are partially fixed. 3. The cold-retaining article according to claim 1, wherein a mixture of the super absorbent plastic material and a cryogen is enclosed in a bag made of the thin sheet. 4 The cryogen is ammonium nitrate, sodium nitrate,
The cold-retaining article according to claim 1 or 3, which is one type selected from sodium chloride. 5. The cold-retaining article according to claim 3, wherein the bag is made of a water-impermeable sheet.