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Cold insulation tool

A device and indicator technology, applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve problems such as difficult cooling conditions

Inactive Publication Date: 2017-08-18
TOPPAN MOORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the cold storage device described in Patent Document 1, even if the cold storage composition contains a dye, it is difficult to visually confirm the cooling state such as freezing, whether the cold storage device can be sufficiently cooled to the required temperature for cold storage, and difficult Visually check the cooling status, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110]

[0111] At room temperature (20°C to 25°C), water (97 parts by mass), diammonium hydrogenphosphate (2 parts by mass), CMC (1 part by mass), and BCP were added and mixed to obtain a composition for cold preservation. At this time, the compounding quantity of BCP was adjusted so that the content in the obtained composition for cold preservation may become 10 ppm. Table 1 shows each mixing component other than water, its content (concentration), pH (A), pH (B), and the like. And the pH (C) before freezing of the obtained composition for cold preservation was measured. The results are shown in Table 1. pH (A), pH (B), and pH (C) are all the results of measuring the temperature of the object to be measured as 25°C.

[0112] In addition, in Table 1, the value recorded in the unit of "mass %" in the column of inorganic salt indicates the content of the inorganic salt of the composition for cold preservation and the concentration of the aqueous solution of the inorganic sa...

Embodiment 2 to 19、 comparative example 1 to 13

[0123] Except for the mixing components and concentration of the composition for cold preservation shown in Tables 1 to 5, the composition for cold preservation and the cold preservation appliance were manufactured by the same method as Example 1, and the composition for cold preservation was evaluated. The results are shown in Tables 1 to 5. For example, in Example 6, four kinds of sodium chloride, potassium chloride, sodium sulfate, and diammonium hydrogen phosphate are used as inorganic salts, but their contents in the composition for cold preservation and Ph (A) are measured. The concentration in the aqueous solution was 10% by mass of sodium chloride, 5% by mass of potassium chloride, 2% by mass of sodium sulfate, and 0.1% by mass of diammonium hydrogenphosphate. In the table, "-" means that the ingredient is not mixed, and it also means that the corresponding pH (A) or pH (B) is not measured.

[0124] [Table 1]

[0125]

[0126] [Table 2]

[0127]

[0128] [tabl...

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Abstract

A cold insulation tool comprises a cold-insulating composition comprising water, an inorganic salt, a thickening agent and a pH indicator, wherein the thickening agent is a polysaccharide, the pH (A) of the cold-insulating composition is 7.0 or more when all of components other than the inorganic salt and water are replaced by water and the pH (A) satisfies the relation represented by formula (I): (the pKa value of the pH indicator) - 0.5 <= pH(A) <= (the pKa value of the pH indicator) + 3.5.

Description

technical field [0001] The present invention relates to a cold storage device provided with a composition for cold storage in which a color change during cooling can be easily confirmed visually. [0002] This application is based on and claims priority from Patent Application No. 2014-221679 filed in Japan on October 30, 2014, the entire contents of which are hereby incorporated by reference. Background technique [0003] Cold storage appliances are widely used in the storage and transportation of various fresh items, and can generally be reused. Such a cold storage device is configured to include a cold storage composition having a cold storage function, and the cold storage composition is enclosed in a thermally conductive container. [0004] As a composition for cold preservation, there is known a composition containing a coloring agent so that its presence can be easily confirmed visually from the outside of the cold preservation appliance. A cooling device whose quan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/08C09K5/14
CPCC09K5/08C09K5/14
Inventor 内野绫田中康弘
Owner TOPPAN MOORE CO LTD
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